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color:#9a5e1e;\n font-weight:900;\n font-size:12px;\n}\n.pok-compare-note{\n margin-top:20px;\n padding:18px 20px;\n border:1px solid #d8e5eb;\n border-left:6px solid var(--gold);\n border-radius:0 22px 22px 0;\n background:#fff;\n}\n.pok-compare-note strong{\n display:block;\n color:var(--ink);\n font-size:18px;\n margin-bottom:6px;\n}\n.pok-compare-note p{\n margin:0;\n font-size:15px;\n line-height:1.6;\n color:#425968;\n}\n@media(max-width:1040px){\n .pok-compare-widget__head,.pok-compare-body{grid-template-columns:1fr}\n .pok-compare-controls{grid-template-columns:1fr 1fr}\n .pok-compare-reset{grid-column:1\/-1}\n}\n@media(max-width:760px){\n .pok-compare-table{min-width:860px;table-layout:auto}\n .pok-compare-table th:first-child,\n .pok-compare-table td:first-child{width:190px}\n}\n@media(max-width:640px){\n .pok-compare-widget{padding:20px;border-radius:26px}\n .pok-compare-controls,.pok-compare-mini{grid-template-columns:1fr}\n .pok-radar-card{padding:22px 12px}\n .pok-radar-chart{max-width:100%;}\n .pok-radar-title{display:block}\n .pok-radar-title span{display:block;margin-top:6px}\n}\n<\/style>\n<p><\/head><br \/>\n<body><\/p>\n<section class=\"hero\" id=\"top\" aria-label=\"Polyketone POK \/ PK for friction, chemical contact and stable geometry\"><video autoplay loop muted playsinline preload=\"auto\" poster=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/image-03-5f44921b.jpg\"><source src=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/video-01-8fe90c2e.mp4\" type=\"video\/mp4\"><\/video><\/p>\n<div class=\"hero-inner\">\n<div class=\"hero-copy\">\n<div class=\"kicker\">A material platform for precision assemblies<\/div>\n<h1>Polyketone POK \/ PK for friction, chemical contact and stable geometry<\/h1>\n<p class=\"lead\">Polyketone POK \/ PK is a high-performance semi-crystalline thermoplastic for parts whose service life is governed by friction, contact with liquids or lubricants, micro-clearance stability, low water absorption and predictable behavior after operating cycles. Exablend\u00ae POK is positioned as a material platform for gears, rollers, valves, metering units, pump elements, fuel-contact and chemically loaded components.<\/p>\n<div class=\"hero-badges\">\n<div class=\"hero-badge\"><b>Wear resistance<\/b><span>controlled condition of the working surface in the friction pair<\/span><\/div>\n<div class=\"hero-badge\"><b>Chemical resistance<\/b><span>lubricants, fuels, cleaning and industrial media<\/span><\/div>\n<div class=\"hero-badge\"><b>Low water absorption<\/b><span>lower risk of fit change in a moisture-exposed assembly<\/span><\/div>\n<div class=\"hero-badge\"><b>Stable clearance<\/b><span>repeatable travel after operating cycles<\/span><\/div>\n<\/div>\n<div class=\"actions\"><button class=\"btn primary\" onclick=\"openModal('request')\" type=\"button\">Send inquiry<\/button><button class=\"btn outline\" onclick=\"openModal('tds')\" type=\"button\">Download TDS<\/button><a class=\"btn call\" href=\"tel:+380503232321\">Call us<\/a><\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"what-is-pok\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">01 \u00b7 Material foundation<\/div>\n<h2>What Is Polyketone POK \/ PK and Why It Is Evaluated at the Assembly Level<\/h2>\n<p class=\"lead\">Polyketone is a semi-crystalline aliphatic polymer based on carbon monoxide and olefins. Its regular chain structure, polar carbonyl groups and dense morphology produce a combination valuable for moving parts: wear resistance, hydrolytic stability, low moisture dependence, chemical resistance and barrier behavior.<\/p>\n<\/div>\n<div class=\"grid2\">\n<div class=\"card\">\n<h3>Evaluation starts with the mechanism of function loss<\/h3>\n<p>A gear, roller, bushing, metering element or bearing component can lose its function gradually: the clearance changes, noise increases, wear particles appear, smoothness of travel deteriorates, or the surface swells after contact with water or a working fluid.<\/p>\n<p>POK is correctly considered for parts where friction, the operating environment, impact toughness, shrinkage and repeatable geometry form a single engineering problem.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Position among engineering polymers<\/h3>\n<p>PA6\/PA66 have a broad structural track record, but water often becomes a design factor. POM performs well in many dry gear drives, yet it does not always cover requirements for chemical or fuel contact. PBT is appropriate for housings and electrical components, but it is not always the optimal candidate for assemblies with intensive friction. PPS, PPA and PEEK are justified for higher temperature or chemical regimes, though they may create an over-specified solution.<\/p>\n<p>POK’s strong zone is a moving part in a liquid or chemical environment where stable clearance, controlled wear and predictable geometry matter.<\/p>\n<\/div>\n<\/div>\n<div class=\"kpi-row\">\n<div class=\"kpi\"><b>~220\u00b0C<\/b><span>typical melting temperature of the POK platform<\/span><\/div>\n<div class=\"kpi\"><b>0.4%<\/b><span>water absorption of Exablend\u00ae POK CF20 TRM at 23\u00b0C \/ 50% RH<\/span><\/div>\n<div class=\"kpi\"><b>17 000 MPa<\/b><span>tensile modulus of Exablend\u00ae POK GF50 S4<\/span><\/div>\n<div class=\"kpi\"><b>~10\u00b3 \u03a9<\/b><span>surface resistance of Exablend\u00ae POK CF20 TRM<\/span><\/div>\n<\/div>\n<div class=\"conclusion\"><strong>Section takeaway<\/strong><\/p>\n<p>POK should be positioned as a platform for managing assembly function: contact surface service life, fit stability, behavior after moisture or chemical exposure, and repeatability of series-production geometry.<\/p>\n<\/div>\n<\/section>\n<section class=\"pok-compare-section\" id=\"pok-material-comparison\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">02 \u00b7 Interactive Comparison<\/div>\n<h2>POK vs POM, PA6, PA66, PA12, PBT and PPS: An Honest Engineering Selection Map<\/h2>\n<p class=\"lead\">Polyketone is not the cheapest engineering plastic and should not be presented as a universal replacement for all materials. Its strong zone is parts where friction, chemical contact, moisture, stable clearance and service life act simultaneously. In this block, POK is compared with its closest engineering alternatives without hiding its weak points: in cost-effectiveness it is inferior to commodity PA, POM and PBT, but it often wins where part failure is driven by wear, moisture, chemical attack or unstable motion.<\/p>\n<\/p><\/div>\n<div class=\"pok-compare-widget\" data-pok-compare>\n<div class=\"pok-compare-widget__head\">\n<div>\n<h3>Select 2 materials or add a third one for comparison<\/h3>\n<p>The chart shows relative engineering suitability across 9 criteria. The rating does not replace testing of a specific grade in a real part, but it helps to quickly understand where POK is genuinely appropriate and where another polymer is more economical or technically logical.<\/p>\n<\/p><\/div>\n<div class=\"pok-compare-mini\" aria-label=\"Key comparison takeaways\">\n<div><b>POK \u2260 the cheapest<\/b><span>price is not its strong point<\/span><\/div>\n<div><b>POK is strong in the assembly<\/b><span>friction + chemicals + moisture + clearance<\/span><\/div>\n<div><b>PPS is higher in heat resistance<\/b><span>but that is a different price class<\/span><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"pok-compare-controls\">\n<div class=\"pok-compare-field\">\n <label for=\"pokCompare1\">Material 1<\/label><br \/>\n <select id=\"pokCompare1\" data-pok-compare-select=\"1\"><\/select>\n <\/div>\n<div class=\"pok-compare-field\">\n <label for=\"pokCompare2\">Material 2<\/label><br \/>\n <select id=\"pokCompare2\" data-pok-compare-select=\"2\"><\/select>\n <\/div>\n<div class=\"pok-compare-field\">\n <label for=\"pokCompare3\">Material 3<\/label><br \/>\n <select id=\"pokCompare3\" data-pok-compare-select=\"3\"><\/select>\n <\/div>\n<p> <button class=\"pok-compare-reset\" type=\"button\" data-pok-compare-reset>Reset<\/button>\n <\/div>\n<div class=\"pok-compare-body\">\n<div class=\"pok-radar-card\">\n<div class=\"pok-radar-title\">\n<h3>Property radar<\/h3>\n<p> <span>higher = stronger position<\/span>\n <\/div>\n<p> <svg class=\"pok-radar-chart\" viewBox=\"0 0 720 540\" role=\"img\" aria-label=\"Radar comparison of materials\" data-pok-radar><\/svg><\/p>\n<div class=\"pok-radar-legend\" data-pok-legend><\/div>\n<\/p><\/div>\n<div class=\"pok-table-card\">\n<div class=\"pok-compare-table-wrap\" data-pok-table><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"pok-compare-note\">\n <strong>How to read the rating<\/strong><\/p>\n<p>The “cost-effectiveness” criterion is an inverse cost indicator: the higher the score, the more economical the material in typical high-volume applications. That is why PA6, PA66, POM and PBT score stronger here than POK. For POK, what matters is not the lowest price per kilogram, but the reduced risk of wear, swelling, chemical degradation, unstable clearance or premature assembly failure.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n<section class=\"wrap\" id=\"exablend-pok-grades\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">Exablend\u00ae POK \u00b7 Product Grades<\/div>\n<h2>Polyketone grades for different part operating regimes<\/h2>\n<p class=\"lead\">After the initial assessment of the assembly, it is important to move from the general logic of POK to a specific grade. Exablend\u00ae POK includes glass-filled, mineral-filled and carbon-filled compounds for friction parts, chemical contact, stable geometry, high stiffness and precision molding.<\/p>\n<\/div>\n<div class=\"grid3\"><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-gf30-g2\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag green\">30% GF \u00b7 balanced stiffness<\/span><\/p>\n<h3>Exablend\u00ae POK GF30 G2<\/h3>\n<p>Glass-filled POK with 30% GF for technical parts that require a combination of stiffness, wear resistance, chemical resistance and dimensional stability.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-gf50-f4\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag green\">50% GF \u00b7 high rigidity<\/span><\/p>\n<h3>Exablend\u00ae POK GF50 F4<\/h3>\n<p>Highly filled POK with 50% glass fiber for structural parts where stiffness, strength, dimensional stability and performance under load are critical.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-gf50-s4\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag green\">50% GF \u00b7 low shrinkage<\/span><\/p>\n<h3>Exablend\u00ae POK GF50 S4<\/h3>\n<p>POK with 50% GF for high stiffness, low shrinkage, precision molding and series-production parts where repeatable geometry after cooling matters.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-mf25-s2\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag orange\">25% MF \u00b7 low warpage<\/span><\/p>\n<h3>Exablend\u00ae POK MF25 S2<\/h3>\n<p>Mineral-filled POK for precise functional parts, housings, pump and valve components that require wear resistance, surface quality and warpage control.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-cf20trm\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag\">20% CF \u00b7 dimensional precision<\/span><\/p>\n<h3>Exablend\u00ae POK CF20 TRM<\/h3>\n<p>Carbon-filled POK with 20% CF for dimensional accuracy, fuel contact, barrier behavior and an electrically conductive surface profile in technical assemblies.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><\/div>\n<div class=\"conclusion\"><strong>How to use this block<\/strong><\/p>\n<p>If the technical specification is not yet detailed, selection should not start from the GF or CF percentage alone. First, define the part’s operating regime: the friction pair, environment, temperature, tolerances, shrinkage, surface requirements, electrical profile and geometry stability over cycles.<\/p>\n<\/div>\n<\/section>\n<section class=\"premium\" id=\"strengths\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">02 \u00b7 POK Strengths<\/div>\n<h2>The advantages of polyketone emerge in the combination of properties<\/h2>\n<p class=\"lead\">What matters to a technical decision-maker is not a list of characteristics but the risk the material removes from the part: clearance change after moisture, wear in liquid, gear-mesh noise, wall permeability, degradation after media contact or molding instability.<\/p>\n<\/div>\n<div class=\"grid4\">\n<div class=\"card\">\n<h3>Tribology<\/h3>\n<p>In a gear drive, wear means a change of tooth profile, backlash, noise, local heating and a growing amount of wear particles.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Chemical contact<\/h3>\n<p>The material is assessed by retention of mass, surface, strength, travel and dimensions after exposure to a specific medium.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Moisture and hydrolysis<\/h3>\n<p>Low moisture dependence reduces the risk of fit change, jamming, unstable actuation force and increasing noise.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Barrier behavior<\/h3>\n<p>In fuel, gas and metering systems, permeability, sorption and wall stability can be as critical as strength.<\/p>\n<\/div>\n<\/div>\n<div class=\"wear-grid\" id=\"wear-comparison\">\n<div class=\"wear-card\">\n<div class=\"eyebrow\">Tribological comparison<\/div>\n<h3>Wear index comparison of POK, PA and POM<\/h3>\n<p>Polyketone demonstrates pronounced wear resistance compared with traditional engineering plastics. In the comparative data presented, the wear index of POK is taken as 3 arbitrary units, PA as 8 and POM as 30. The lower the value, the lower the wear under comparable test conditions.<\/p>\n<p>In practical terms, this means POK can outperform POM by roughly a factor of 10 and polyamides by roughly a factor of 3 in wear resistance. For a series-production part, such data must be confirmed on the real friction pair, speed, pressure, temperature and presence of contaminant particles.<\/p>\n<div class=\"wear-data\">\n<div><b>3<\/b><span>POK \/ Exablend\u00ae POK<br \/>low wear index<\/span><\/div>\n<div><b>8<\/b><span>PA \/ polyamide<br \/>medium wear index<\/span><\/div>\n<div><b>30<\/b><span>POM \/ acetal<br \/>high wear index<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"wear-card\"><svg class=\"wear-svg\" viewBox=\"0 0 760 520\" role=\"img\"><title>Wear index comparison of POK, PA and POM<\/title><rect x=\"0\" y=\"0\" width=\"760\" height=\"520\" fill=\"#ffffff\"\/><text x=\"380\" y=\"42\" text-anchor=\"middle\" font-size=\"24\" font-weight=\"900\" fill=\"#07131b\">Wear comparison of POK, PA and POM<\/text><text x=\"380\" y=\"70\" text-anchor=\"middle\" font-size=\"14\" fill=\"#60717d\">wear index, arbitrary units \u00b7 lower = better<\/text><g stroke=\"#d8e5eb\" stroke-width=\"1\"><line x1=\"90\" y1=\"410\" x2=\"690\" y2=\"410\"\/><line x1=\"90\" y1=\"340\" x2=\"690\" y2=\"340\"\/><line x1=\"90\" y1=\"270\" x2=\"690\" y2=\"270\"\/><line x1=\"90\" y1=\"200\" x2=\"690\" y2=\"200\"\/><line x1=\"90\" y1=\"130\" x2=\"690\" y2=\"130\"\/><\/g><g fill=\"#60717d\" font-size=\"13\"><text x=\"70\" y=\"414\" text-anchor=\"end\">0<\/text><text x=\"70\" y=\"344\" text-anchor=\"end\">7<\/text><text x=\"70\" y=\"274\" text-anchor=\"end\">14<\/text><text x=\"70\" y=\"204\" text-anchor=\"end\">21<\/text><text x=\"70\" y=\"134\" text-anchor=\"end\">28<\/text><\/g><line x1=\"90\" y1=\"410\" x2=\"690\" y2=\"410\" stroke=\"#405967\" stroke-width=\"2\"\/><line x1=\"90\" y1=\"110\" x2=\"90\" y2=\"410\" stroke=\"#405967\" stroke-width=\"2\"\/><rect x=\"170\" y=\"380\" width=\"110\" height=\"30\" rx=\"8\" fill=\"#117a2e\"\/><rect x=\"325\" y=\"330\" width=\"110\" height=\"80\" rx=\"8\" fill=\"#ffe600\"\/><rect x=\"480\" y=\"110\" width=\"110\" height=\"300\" rx=\"8\" fill=\"#ffa51e\"\/><g fill=\"#07131b\" font-size=\"18\" font-weight=\"900\"><text x=\"225\" y=\"372\" text-anchor=\"middle\">3<\/text><text x=\"380\" y=\"322\" text-anchor=\"middle\">8<\/text><text x=\"535\" y=\"102\" text-anchor=\"middle\">30<\/text><\/g><g fill=\"#07131b\" font-size=\"15\" font-weight=\"900\"><text x=\"225\" y=\"444\" text-anchor=\"middle\">POK<\/text><text x=\"380\" y=\"444\" text-anchor=\"middle\">PA<\/text><text x=\"535\" y=\"444\" text-anchor=\"middle\">POM<\/text><\/g><text x=\"390\" y=\"486\" text-anchor=\"middle\" font-size=\"14\" fill=\"#60717d\">Wear index, arbitrary units. A lower value means less wear.<\/text><\/svg><\/div>\n<\/div>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Test<\/th>\n<th>POK \/ Exablend\u00ae<\/th>\n<th>POM \/ acetal<\/th>\n<th>PA66<\/th>\n<th>Engineering interpretation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Taber abrasion test<sup>1<\/sup><\/strong><\/td>\n<td class=\"good\">\u2191\u2191 very low wear<\/td>\n<td>high wear<\/td>\n<td class=\"limit\">failure or severe damage<\/td>\n<td>Simulates surface abrasion typical of friction with dust, sand or microparticles.<\/td>\n<\/tr>\n<tr>\n<td><strong>ASTM D-3702 PV limit<sup>2<\/sup><\/strong><\/td>\n<td class=\"good\">highest level<\/td>\n<td>medium<\/td>\n<td class=\"limit\">low<\/td>\n<td>A key parameter for dynamic friction assemblies where pressure and speed generate the thermal load.<\/td>\n<\/tr>\n<tr>\n<td><strong>Bevel-gear wear test<sup>3<\/sup><\/strong><\/td>\n<td class=\"good\">almost no wear<\/td>\n<td>significant damage<\/td>\n<td>significant damage<\/td>\n<td>Allows assessment of long-term performance under gear-tooth contact conditions.<\/td>\n<\/tr>\n<tr>\n<td><strong>Pin-on-Disk<sup>4<\/sup><\/strong><\/td>\n<td class=\"good\">low wear<\/td>\n<td>higher<\/td>\n<td>higher<\/td>\n<td>Shows surface resistance to sliding friction in a controlled contact configuration.<\/td>\n<\/tr>\n<tr>\n<td><strong>Friction noise coefficient<sup>5<\/sup><\/strong><\/td>\n<td class=\"good\">\u221216% vs POM<\/td>\n<td>baseline level<\/td>\n<td>depends on humidity and the friction pair<\/td>\n<td>Characterizes undesirable acoustic effects arising from contact between materials.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"table-notes\"><strong>Notes to the table<\/strong><\/p>\n<ol class=\"table-notes-list\">\n<li><b>The Taber abrasion test<\/b> simulates abrasion with dust, sand and microparticles.<\/li>\n<li><b>PV limit<\/b> describes the limiting combination of pressure and speed in a friction assembly.<\/li>\n<li><b>The bevel-gear wear test<\/b> is useful for assessing wear in gear drives.<\/li>\n<li><b>Pin-on-Disk<\/b> shows sliding friction in a controlled contact configuration.<\/li>\n<li><b>Friction noise<\/b> matters for drives, metering units, household appliances and mechanisms with acoustic requirements.<\/li>\n<\/ol>\n<\/div>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Chemical<\/th>\n<th>Duration<\/th>\n<th>Mass change, %<\/th>\n<th>Strength loss, %<\/th>\n<th>Comment<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Acetic acid 5%<\/strong><\/td>\n<td>365 days<\/td>\n<td>+2.8<\/td>\n<td>\u22128<\/td>\n<td>No change in appearance.<\/td>\n<\/tr>\n<tr>\n<td><strong>Acetone 100%<\/strong><\/td>\n<td>365 days<\/td>\n<td>+4.7<\/td>\n<td>\u221210<\/td>\n<td>Slight yellowing.<\/td>\n<\/tr>\n<tr>\n<td><strong>Benzene 1%, BTX mixture<\/strong><\/td>\n<td>120 days<\/td>\n<td>0<\/td>\n<td>\u22121\u2026\u22125<\/td>\n<td>Geometry retained.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ammonium hydroxide 10%<\/strong><\/td>\n<td>365 days<\/td>\n<td>\u22124.0<\/td>\n<td>\u221213<\/td>\n<td>Darkening; structure stable.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ethylene glycol-based antifreeze<\/strong><\/td>\n<td>730 days<\/td>\n<td>+0.6<\/td>\n<td>\u22127<\/td>\n<td>Full integrity.<\/td>\n<\/tr>\n<tr>\n<td><strong>Chloroform 100%<\/strong><\/td>\n<td>730 days<\/td>\n<td>+25.4<\/td>\n<td>\u221225<\/td>\n<td><span class=\"limit\">Swelling; not recommended without separate validation.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Media type<\/th>\n<th>POK resistance<\/th>\n<th>Application comment<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Aliphatic hydrocarbons<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>Hexane, octane, diesel \u2014 usually no significant changes after testing.<\/td>\n<\/tr>\n<tr>\n<td><strong>Aromatic hydrocarbons<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Toluene, xylene \u2014 slight yellowing possible; confirmation at operating temperature is required.<\/td>\n<\/tr>\n<tr>\n<td><strong>Alcohols and glycols<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>Ethanol, antifreeze \u2014 a strong zone for liquid contact.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ketones, ethers, esters<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Acetone, ethyl acetate \u2014 moderate swelling possible.<\/td>\n<\/tr>\n<tr>\n<td><strong>Weak and medium-strength acids<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Strength retention depends on concentration, temperature and contact time.<\/td>\n<\/tr>\n<tr>\n<td><strong>Alkalis and salts<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>NaOH, NH\u2084OH, CaCl\u2082 \u2014 stability under moderate regimes after formulation verification.<\/td>\n<\/tr>\n<tr>\n<td><strong>Water, humidity and aqueous media<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>Low water absorption and better dimensional stability compared with polyamides. Contact with steam or hot aqueous media requires verification for temperature, pressure and cycle duration.<\/td>\n<\/tr>\n<tr>\n<td><strong>Detergents and enzymes<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Slight discoloration possible; function is verified in the actual formulation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"engineering-logic\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">03 \u00b7 Assembly Engineering Logic<\/div>\n<h2>How POK works in an assembly: friction, moisture, chemicals and stable clearance<\/h2>\n<p class=\"lead\">This block shows the regimes in which POK should be tested first: a moving part, liquid contact, micro-clearance stability, water absorption, wear and geometry repeatability over cycles.<\/p>\n<\/div>\n<div class=\"grid3\">\n<div class=\"card\">\n<h3>Selection map<\/h3>\n<p>POK is not presented as a universal material. It should be included in testing first when the part is moving, contacts a liquid, has a critical clearance or shows PA\/POM risks in the real geometry.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Water absorption<\/h3>\n<p>In wet assemblies, POK reduces the risk of fit change and travel stability issues compared with polyamides, but actual behavior must be verified on the specific grade and geometry.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Metering systems<\/h3>\n<p>For metering units, valves and pump components, what matters is small precision mechanics, chemical contact, repeatable travel, surface cleanliness and micro-clearance stability.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"reinforced-pok-checklist\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">04 \u00b7 Reinforced Grades<\/div>\n<h2>What to verify in GF\/CF POK grades<\/h2>\n<p class=\"lead\">Reinforcement increases stiffness and dimensional stability under load. For a series-production part, it is important to verify the behavior of the specific geometry in the melt flow and after cooling.<\/p>\n<\/div>\n<div class=\"check-grid\">\n<div class=\"check-card\"><i>1<\/i><strong>Flow direction<\/strong><\/p>\n<p>fiber orientation relative to mating surfaces<\/p>\n<\/div>\n<div class=\"check-card\"><i>2<\/i><strong>Weld lines<\/strong><\/p>\n<p>strength and appearance at flow weld locations<\/p>\n<\/div>\n<div class=\"check-card\"><i>3<\/i><strong>Shrinkage<\/strong><\/p>\n<p>shrinkage along and across the flow direction<\/p>\n<\/div>\n<div class=\"check-card\"><i>4<\/i><strong>Trial molding<\/strong><\/p>\n<p>actual geometry after cycle stabilization<\/p>\n<\/div>\n<div class=\"check-card\"><i>5<\/i><strong>Functional test<\/strong><\/p>\n<p>fit, clearance, noise and actuation force in the real assembly<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"band\" id=\"not-use\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">05 \u00b7 Application Limits<\/div>\n<h2>When POK is technically excessive or carries a high risk of mismatch<\/h2>\n<p class=\"lead\">Honest positioning of a premium material separates the tasks where POK removes risk from products where another polymer is more rational or a higher temperature class is required.<\/p>\n<\/div>\n<div class=\"grid2\">\n<div class=\"risk-list\">\n<div class=\"risk\"><i>1<\/i><\/p>\n<div><strong>A dry mechanism already meets its service life<\/strong><span>If POM or PA run reliably without water, chemicals, noise or precision fits, switching to POK may not create a noticeable economic effect.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>2<\/i><\/p>\n<div><strong>A static housing without contact media<\/strong><span>For a housing without friction, permeability or liquid contact, PBT, PA or PC\/ABS often look more rational.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>3<\/i><\/p>\n<div><strong>Sustained high temperature<\/strong><span>For multi-year operation at elevated temperature under load, PPA, PPS or PEEK become the first candidates.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>4<\/i><\/p>\n<div><strong>Extreme chemistry<\/strong><span>For strong oxidizers, concentrated acids, aggressive solvent mixtures or prolonged contact at elevated temperature, POK should not be specified without dedicated testing.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>5<\/i><\/p>\n<div><strong>Complex reinforced geometry<\/strong><span>Long ribs, abrupt wall-thickness transitions, critical weld lines and asymmetric flow increase the need to verify shape stability.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>6<\/i><\/p>\n<div><strong>Regulated contact<\/strong><span>Food, drinking-water or medical contact requires separate confirmation of the grade and its regulatory basis.<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"card\">\n<h3>How to make the decision<\/h3>\n<p>The question should be: which risk in the assembly costs more than the difference in material price? If mechanism stoppage, noise, wear in liquid, unstable clearance or permeability are critical, POK should be included in the test matrix.<\/p>\n<p>If the primary requirement is the lowest price, sustained high temperature or extreme chemistry, material selection should start from a different polymer group.<\/p>\n<\/div>\n<\/div>\n<div class=\"conclusion\"><strong>Section takeaway<\/strong><\/p>\n<p>POK is not a universal answer for every part. Its strong role emerges where a standard polymer gradually loses function, while a high-temperature material creates an over-specified solution.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"dark\" id=\"processing\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">06 \u00b7 POK Processing<\/div>\n<h2>Polyketone processing is part of the material solution<\/h2>\n<p class=\"lead\">The properties of POK in a part depend on drying, barrel cleanliness, melt residence time, temperature profile, mold temperature, pressure, injection speed, flow direction, weld lines and the actual shrinkage in a specific mold.<\/p>\n<\/div>\n<div class=\"grid2\">\n<div class=\"card\">\n<h3>GF30 \/ GF50 S4 \/ MF25<\/h3>\n<p>Typical molding profile: 220 \u2192 245\u00b0C, mold temperature around 80\u00b0C, pressure 80\u2013130 MPa, medium to high injection speed. For glass-filled grades, controlling fiber orientation and differential shrinkage is critical.<\/p>\n<div class=\"temp-profile\">\n<div class=\"temp\"><small>Zone 1<\/small><b>220<\/b><\/div>\n<div class=\"temp\"><small>Zone 2<\/small><b>225<\/b><\/div>\n<div class=\"temp\"><small>Zone 3<\/small><b>230<\/b><\/div>\n<div class=\"temp\"><small>Zone 4<\/small><b>235<\/b><\/div>\n<div class=\"temp\"><small>Adapter<\/small><b>240<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 1<\/small><b>245<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 2<\/small><b>245<\/b><\/div>\n<\/div>\n<\/div>\n<div class=\"card\">\n<h3>MW-010GP \/ CF20 TRM \/ GF50 F4<\/h3>\n<p>The unfilled grade offers a wider processing window for injection molding and extrusion. CF20 TRM requires careful control of fiber, surface quality and electrical profile. GF50 F4 can run at higher temperatures in the final zones but requires residence time control.<\/p>\n<div class=\"temp-profile\">\n<div class=\"temp\"><small>Zone 1<\/small><b>180<\/b><\/div>\n<div class=\"temp\"><small>Zone 2<\/small><b>190<\/b><\/div>\n<div class=\"temp\"><small>Zone 3<\/small><b>200<\/b><\/div>\n<div class=\"temp\"><small>Zone 4<\/small><b>210<\/b><\/div>\n<div class=\"temp\"><small>Adapter<\/small><b>220<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 1<\/small><b>230<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 2<\/small><b>240<\/b><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid3\" style=\"margin-top:24px\">\n<div class=\"card\">\n<h3>Drying<\/h3>\n<p>GF30: 4\u20136 h at 90\u2013110\u00b0C down to 0.02%. GF50 S4\/MF25: 2\u20133 h at 90\u2013110\u00b0C down to 0.02%. MW-010GP: 4\u20136 h at 80\u201390\u00b0C down to below 0.1%.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Melt residence time<\/h3>\n<p>Excessive temperature and prolonged residence in the barrel or hot runner can cause dark specks, viscosity changes, surface degradation and an unstable production run.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Equipment purging<\/h3>\n<p>Purging with polyolefins is advisable before and after POK. Particular attention is required after POM, PA and unknown colorants or additives.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"expertise\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">07 \u00b7 Material Wizard expertise<\/div>\n<h2>Material Wizard as the technical center for material decision-making<\/h2>\n<p class=\"lead\">The company’s role is to match the part’s failure mechanism to a material family, select an Exablend\u00ae POK grade, assess processing, run application testing and bring the solution to a stable production run.<\/p>\n<\/div>\n<div class=\"grid3\">\n<div class=\"card\">\n<h3>1. Assembly diagnostics<\/h3>\n<p>Friction pair, environment, temperature, cycle life, noise, tolerances, expected economics of failure.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>2. Material family selection<\/h3>\n<p>POK is compared with PA, POM, PBT, PPA, PPS and PEEK by the risk of functional failure.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>3. Exablend\u00ae formulation<\/h3>\n<p>Unfilled, glass-filled, carbon-filled, mineral-filled, conductive or specially modified formulations.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>4. Processing validation<\/h3>\n<p>Drying, temperature profile, pressure, weld lines, residence time, purging and actual mold stability.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>5. In-part testing<\/h3>\n<p>Friction, noise, fit, chemicals, moisture, thermal cycling, service life, repeatability, comparison with the current material.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>6. Series stabilization<\/h3>\n<p>Batch control, processing recommendations, formulation adjustments, support during launch and scale-up.<\/p>\n<\/div>\n<\/div>\n<div class=\"conclusion\"><strong>Overall conclusion<\/strong><\/p>\n<p>The POK landing page should demonstrate engineering confidence: Material Wizard understands the environment, loads, processing, alternatives and the economics of a series-production part.<\/p>\n<\/div>\n<\/section>\n<section class=\"band\" id=\"faq\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">Engineer’s questions<\/div>\n<h2>FAQ about polyketone POK \/ PK<\/h2>\n<p class=\"lead\">Brief answers for initial material screening before a technical consultation and testing in a specific part.<\/p>\n<\/div>\n<div class=\"faq-list\">\n<details class=\"faq-item\">\n<summary>What is polyketone POK \/ PK?<\/summary>\n<p>POK \/ PK is a high-performance semi-crystalline thermoplastic with a strong position in friction assemblies, chemical contact, moisture, fuel and metering environments.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>How does POK differ from POM?<\/summary>\n<p>POM is often strong in dry mechanisms. POK is worth testing when friction is combined with chemicals, water, fuel, micro-clearance stability, noise or barrier behavior.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>When is POK better than PA66?<\/summary>\n<p>POK has a practical advantage where the water absorption of PA66 can affect fit, clearance, noise, actuation force or dimensional stability after conditioning.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Is POK suitable for friction parts?<\/summary>\n<p>Yes, but the decision is made after verifying the actual friction pair, speed, pressure, lubricant, contact temperature, wear particles and noise after cycling.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>When should POK not be used?<\/summary>\n<p>POK may be excessive for simple static housings, dry assemblies already running reliably on POM, or parts exposed to sustained high temperatures of the PPS\/PPA\/PEEK class.<\/p>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"related-materials\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">Material architecture<\/div>\n<h2>Related material solutions<\/h2>\n<p class=\"lead\">POK should be considered together with alternatives and neighboring material families so that the choice is technically and economically justified.<\/p>\n<\/div>\n<div class=\"link-grid\"><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/pom\/\">POM \/ polyoxymethylene<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/polyamides\/injection-grade\/\">PA66<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/pbt-pk-abs-ps\/polibutilentereftalat\/\">PBT<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/high-performance-polymers\/pps-psu-pok-peek-tpee\/\">PPS \/ PSU \/ PEEK<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/polyamides\/ppa\/\">PPA<\/a><a class=\"link-card\" href=\"#\" onclick=\"openModal('request');return false;\">Polymer selection for your part<\/a><a class=\"link-card\" href=\"#\" onclick=\"openModal('request');return false;\">Compound development<\/a><a class=\"link-card\" href=\"#\" onclick=\"openModal('tds');return false;\">Exablend\u00ae POK grades<\/a><\/div>\n<\/section>\n<section class=\"wrap\">\n<div class=\"footer-cta\">\n<div>\n<div class=\"eyebrow\" style=\"color:#b8d8e8\">Engineering support<\/div>\n<h2>Select Exablend\u00ae POK for your part<\/h2>\n<p>A correct selection requires the friction pair, environment, tolerances, service life, geometry, processing method, expected failure mechanism and the economics of failure.<\/p>\n<\/div>\n<div>\n<div class=\"btns\"><button class=\"btn primary\" onclick=\"openModal('request')\" type=\"button\">Send an inquiry<\/button><button class=\"btn outline\" onclick=\"openModal('tds')\" type=\"button\">Download TDS<\/button><\/div>\n<p style=\"color:#cbd7de;margin-top:16px\">The values on this page are provided as typical reference points. The final decision is made after testing a specific grade in the part geometry.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<p><button aria-label=\"Scroll to top\" class=\"floating-top\" id=\"scrollTopBtn\" title=\"Top\">\u2191<\/button><\/p>\n<div class=\"modal-backdrop\" hidden id=\"modal-backdrop\" onclick=\"closeModal(event)\">\n<div class=\"modal\" onclick=\"event.stopPropagation()\" role=\"dialog\" aria-modal=\"true\"><button class=\"modal-close\" onclick=\"closeModal()\" type=\"button\">\u00d7<\/button><\/p>\n<div class=\"modal-panel\" hidden id=\"modal-tds\">\n<div class=\"modal-head\"><span>TDS \u00b7 Exablend\u00ae POK<\/span><\/p>\n<h2>Select the grade PDF file<\/h2>\n<p>Select the TDS for the required Exablend\u00ae POK grade. If the grade is not obvious, send a technical inquiry describing the part, environment, temperature, friction pair, tolerances and current material.<\/p>\n<\/div>\n<div class=\"tds-grid\"><a class=\"tds-card\" download=\"polyketone-mw-010gp.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-01-830149d8.pdf\"><span class=\"filetype\">PDF<\/span><strong>Polyketone MW-010GP<\/strong><small>unfilled POK \u00b7 flowability, impact toughness, low friction<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-gf30-g2.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-02-2a96b5f0.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK GF30 G2<\/strong><small>30% GF \u00b7 stiffness, wear resistance, dimensional stability<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-gf50-s4.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-03-ccf22653.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK GF50 S4<\/strong><small>50% GF \u00b7 high stiffness, low shrinkage, precision parts<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-gf50-f4.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-04-b2c5dbd4.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK GF50 F4<\/strong><small>50% GF \u00b7 high stiffness, functional parts<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-cf20-trm.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-05-a68b3c38.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK CF20 TRM<\/strong><small>20% CF \u00b7 fuel contact, barrier properties, dimensional accuracy<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-mf25-s2.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-06-fc9b6e3e.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK MF25 S2<\/strong><small>25% MF \u00b7 wear parts, pumps, valves<\/small><em>Download TDS<\/em><\/a><\/div>\n<\/div>\n<div class=\"modal-panel\" hidden id=\"modal-request\">\n<div class=\"modal-head\"><span>Technical inquiry<\/span><\/p>\n<h2>Send an inquiry about Exablend\u00ae POK<\/h2>\n<p>Describe the part, contact environment, temperature, friction pair, tolerances, current material and expected volume. This helps us select a POK grade faster or propose an alternative polymer family.<\/p>\n<\/div>\n<div class=\"actions\"><a class=\"btn primary\" href=\"mailto:info@materialwizard.com.ua?subject=\u0417\u0430\u043f\u0438\u0442 \u0449\u043e\u0434\u043e Exablend POK\">Write an email<\/a><button class=\"btn call\" onclick=\"copyEmail()\" type=\"button\">Copy info@materialwizard.com.ua<\/button><\/div>\n<p aria-live=\"polite\" id=\"copy-status\">\n<\/div>\n<\/div>\n<\/div>\n<p><script>function openModal(type){const b=document.getElementById('modal-backdrop'),t=document.getElementById('modal-tds'),r=document.getElementById('modal-request');if(!b||!t||!r)return false;t.hidden=type!=='tds';r.hidden=type!=='request';b.hidden=false;document.documentElement.style.overflow='hidden';return false}function closeModal(){const b=document.getElementById('modal-backdrop');if(b){b.hidden=true;document.documentElement.style.overflow=''}}async function copyEmail(){const email='info@materialwizard.com.ua',s=document.getElementById('copy-status');try{await navigator.clipboard.writeText(email);if(s)s.textContent='Email copied: '+email}catch(e){if(s)s.textContent='Copy the email manually: '+email}}document.addEventListener('keydown',e=>{if(e.key==='Escape')closeModal()});(function(){const btn=document.getElementById('scrollTopBtn');if(!btn)return;const onScroll=()=>{window.scrollY>500?btn.classList.add('show'):btn.classList.remove('show')};window.addEventListener('scroll',onScroll,{passive:true});onScroll();btn.addEventListener('click',e=>{e.preventDefault();window.scrollTo({top:90,behavior:'smooth'})\/* UA fix: the button returns slightly below the absolute top *\/})})();<\/script><\/p>\n<p><script id=\"pok-interactive-compare-js\">\n(function(){\n const root = document.querySelector('[data-pok-compare]');\n if(!root) return;<\/p>\n<p> const axes = [\n {key:'wear', label:'Wear resistance', radar:'Wear'},\n {key:'friction', label:'Low friction', radar:'Friction'},\n {key:'chem', label:'Chemical resistance', radar:'Chemicals'},\n {key:'moisture', label:'Moisture stability', radar:'Moisture'},\n {key:'stiffness', label:'Stiffness', radar:'Stiffness'},\n {key:'impact', label:'Impact \/ toughness', radar:'Impact'},\n {key:'heat', label:'Heat resistance', radar:'Heat'},\n {key:'processing', label:'Processability', radar:'Processing'},\n {key:'price', label:'Cost affordability', radar:'Price'}\n ];<\/p>\n<p> const materials = {\n pok: {\n name:'POK \/ Polyketone',\n color:'#0d8d74',\n price:'$$$\u2013$$$$',\n values:{wear:5,friction:5,chem:5,moisture:5,stiffness:3.5,impact:4,heat:4,processing:4,price:2},\n notes:{\n wear:'POK\u2019s strong zone: gears, rollers, bushings, pump and metering assemblies.',\n friction:'Smooth motion and low wear in moving parts.',\n chem:'Strong resistance to fuels, lubricants, detergents and industrial media.',\n moisture:'Lower risk of fit and clearance changes than PA6\/PA66.',\n stiffness:'Base POK is moderate; GF\/CF grades sharply increase stiffness.',\n impact:'Good toughness in unfilled and moderately filled grades.',\n heat:'Good level for an engineering plastic, but PPS\/PPA\/PEEK are higher.',\n processing:'Requires discipline in drying and equipment purging, but processes well.',\n price:'Weaker than commodity PA\/POM\/PBT; the choice is justified by service life and reduced failure risk.'\n }\n },\n pom: {\n name:'POM \/ Acetal',\n color:'#d99a2b',\n price:'$$',\n values:{wear:4,friction:5,chem:3,moisture:4,stiffness:3,impact:3,heat:2.5,processing:5,price:4},\n notes:{\n wear:'A strong material for many dry mechanisms, but does not always win in a contaminated or chemical assembly.',\n friction:'One of POM\u2019s strengths \u2014 sliding and stable operation in dry drives.',\n chem:'Limited in a number of chemical environments; compatibility control is required.',\n moisture:'Good dimensional stability compared with PA.',\n stiffness:'Moderate structural stiffness.',\n impact:'Usually lower than tough engineering materials.',\n heat:'Thermal limit lower than POK, PA66, PBT and PPS.',\n processing:'Highly processable and familiar for series molding.',\n price:'Usually more economical than POK.'\n }\n },\n pa6: {\n name:'PA6',\n color:'#2d6cdf',\n price:'$\u2013$$',\n values:{wear:3,friction:3,chem:3,moisture:2,stiffness:3.5,impact:4,heat:3,processing:5,price:5},\n notes:{\n wear:'A workable level for many technical parts, but not a leader in tribology.',\n friction:'Sliding assemblies often require modification or lubrication.',\n chem:'Moderate chemical resistance, depending on the environment and conditioning.',\n moisture:'Strong moisture dependence \u2014 a factor in calculating fits and dimensions.',\n stiffness:'GF grades provide good stiffness.',\n impact:'Good impact strength, especially in modified grades.',\n heat:'A normal engineering level, but lower than high-temperature polymers.',\n processing:'Widely established and convenient for mass molding.',\n price:'One of the most economical options.'\n }\n },\n pa66: {\n name:'PA66',\n color:'#6f58c9',\n price:'$$',\n values:{wear:3,friction:3,chem:3,moisture:2,stiffness:4,impact:3.5,heat:4,processing:4,price:4},\n notes:{\n wear:'A good structural material, but in friction and moisture it does not always cover the task without modification.',\n friction:'Moderate level; sliding often requires special formulations.',\n chem:'A good but not universal resistance profile.',\n moisture:'Water absorption affects dimensions, modulus, fits and noise.',\n stiffness:'GF grades provide high load-bearing capacity.',\n impact:'A good level, but depends on the grade and moisture content.',\n heat:'Better than PA6, often strong in automotive components.',\n processing:'Widely established in mass production, but requires drying control.',\n price:'Usually more economical than POK and PA12.'\n }\n },\n pa12: {\n name:'PA12',\n color:'#2496a8',\n price:'$$$\u2013$$$$',\n values:{wear:3,friction:3,chem:3.5,moisture:4,stiffness:2.5,impact:4,heat:3,processing:4,price:2},\n notes:{\n wear:'Not POK\u2019s main tribological competitor, but good in flexible and stable parts.',\n friction:'A moderate level for sliding.',\n chem:'A good resistance profile in a range of media.',\n moisture:'Significantly more stable than PA6\/PA66 with respect to moisture.',\n stiffness:'Lower than PA66, PBT and reinforced POK.',\n impact:'Good toughness and stability at low temperatures.',\n heat:'A moderate temperature level.',\n processing:'Processes well, but requires proper drying.',\n price:'Priced close to the premium segment, so not always more economical than POK.'\n }\n },\n pbt: {\n name:'PBT',\n color:'#8a9b2f',\n price:'$$',\n values:{wear:2.5,friction:2.5,chem:4,moisture:4,stiffness:3.5,impact:2.5,heat:4,processing:5,price:4},\n notes:{\n wear:'Not a primary material for intensive tribology.',\n friction:'In sliding assemblies it falls behind POM and POK without special modifications.',\n chem:'A strong profile in housing and electrical applications.',\n moisture:'Good dimensional stability compared with PA.',\n stiffness:'GF grades provide good stiffness and stability.',\n impact:'Usually weaker than PA and POK in toughness.',\n heat:'A good level for electrical and housing applications.',\n processing:'A highly processable material for series molding.',\n price:'Usually more economical than POK.'\n }\n },\n pps: {\n name:'PPS',\n color:'#963232',\n price:'$$$$$',\n values:{wear:4,friction:3.5,chem:5,moisture:5,stiffness:4.5,impact:2.5,heat:5,processing:3,price:1},\n notes:{\n wear:'A strong material for high temperatures and chemicals, but not always needed for moderate regimes.',\n friction:'A good level, especially in special modifications.',\n chem:'One of the strongest positions among structural thermoplastics.',\n moisture:'Very stable in humid conditions.',\n stiffness:'High stiffness, especially in GF grades.',\n impact:'Can be more brittle than PA\/POK\/PA12.',\n heat:'Stronger than POK in high-temperature service.',\n processing:'More complex and demanding than PA\/POM\/PBT\/POK.',\n price:'The weakest cost affordability in this comparison.'\n }\n }\n };<\/p>\n<p> const defaults = ['pok','pom',''];\n const selects = Array.from(root.querySelectorAll('[data-pok-compare-select]'));\n const radar = root.querySelector('[data-pok-radar]');\n const legend = root.querySelector('[data-pok-legend]');\n const tableWrap = root.querySelector('[data-pok-table]');\n const reset = root.querySelector('[data-pok-compare-reset]');<\/p>\n<p> function fillSelects(){\n selects.forEach((select, index)=>{\n const options = Object.keys(materials).map(key => '<option value=\"'+key+'\">'+materials[key].name+'<\/option>').join('');\n if(index === 2){\n select.innerHTML = '<option value=\"\">\u2014 do not select a third material \u2014<\/option>' + options;\n }else{\n select.innerHTML = options;\n }\n select.value = defaults[index] || '';\n });\n }<\/p>\n<p> function polarPoint(cx, cy, r, index, total){\n const angle = -Math.PI\/2 + (Math.PI*2*index\/total);\n return [cx + Math.cos(angle)*r, cy + Math.sin(angle)*r];\n }<\/p>\n<p> function polygonFor(mat){\n const cx=360, cy=270, maxR=185;\n return axes.map((axis, i)=>{\n const score = materials[mat].values[axis.key] || 0;\n const p = polarPoint(cx, cy, maxR*(score\/5), i, axes.length);\n return p[0].toFixed(1)+','+p[1].toFixed(1);\n }).join(' ');\n }<\/p>\n<p> function drawRadar(picks){\n const cx=360, cy=270, maxR=185;\n let out = '';\n out += '<rect x=\"0\" y=\"0\" width=\"720\" height=\"540\" rx=\"24\" fill=\"#ffffff\"\/>';\n for(let ring=1; ring<=5; ring++){\n const r = maxR*ring\/5;\n const pts = axes.map((_,i)=>{\n const p=polarPoint(cx,cy,r,i,axes.length);\n return p[0].toFixed(1)+','+p[1].toFixed(1);\n }).join(' ');\n out += '<polygon points=\"'+pts+'\" fill=\"none\" stroke=\"'+(ring===5?'#b9cbd4':'#dce8ee')+'\" stroke-width=\"'+(ring===5?1.4:1)+'\"\/>';\n }\n axes.forEach((axis,i)=>{\n const lineEnd = polarPoint(cx,cy,maxR,i,axes.length);\n const label = polarPoint(cx,cy,maxR+68,i,axes.length);\n const anchor = label[0] < cx-12 ? 'end' : (label[0] > cx+12 ? 'start' : 'middle');\n out += '<line x1=\"'+cx+'\" y1=\"'+cy+'\" x2=\"'+lineEnd[0].toFixed(1)+'\" y2=\"'+lineEnd[1].toFixed(1)+'\" stroke=\"#dce8ee\" stroke-width=\"1\"\/>';\n out += '<text x=\"'+label[0].toFixed(1)+'\" y=\"'+label[1].toFixed(1)+'\" text-anchor=\"'+anchor+'\" dominant-baseline=\"middle\" font-size=\"16\" font-weight=\"900\" fill=\"#34434d\">'+axis.radar+'<\/text>';\n });\n picks.forEach((key,idx)=>{\n const mat = materials[key];\n out += '<polygon points=\"'+polygonFor(key)+'\" fill=\"'+mat.color+'\" fill-opacity=\"'+(idx===0?0.22:0.13)+'\" stroke=\"'+mat.color+'\" stroke-width=\"3.6\"\/>';\n axes.forEach((axis,i)=>{\n const score = mat.values[axis.key] || 0;\n const p = polarPoint(cx, cy, maxR*(score\/5), i, axes.length);\n out += '<circle cx=\"'+p[0].toFixed(1)+'\" cy=\"'+p[1].toFixed(1)+'\" r=\"5\" fill=\"'+mat.color+'\" stroke=\"#fff\" stroke-width=\"1.5\"\/>';\n });\n });\n radar.innerHTML = out;\n }<\/p>\n<p> function buildLegend(picks){\n legend.innerHTML = picks.map(key=>{\n const mat = materials[key];\n return '<span class=\"pok-radar-legend-item\"><i class=\"pok-radar-swatch\" style=\"background:'+mat.color+'\"><\/i>'+mat.name+'<\/span>';\n }).join('');\n }<\/p>\n<p> function scoreHTML(score){\n const pct = Math.max(0, Math.min(100, score\/5*100));\n return '<span class=\"pok-score\"><b>'+score+'\/5<\/b><span class=\"pok-score-bar\"><i style=\"width:'+pct+'%\"><\/i><\/span><\/span>';\n }<\/p>\n<p> function buildTable(picks){\n let html = '<\/p>\n<table class=\"pok-compare-table\">\n<thead>\n<tr>\n<th>Criterion<\/th>\n<p>';\n picks.forEach(key=>{ html += '<\/p>\n<th>'+materials[key].name+'<\/th>\n<p>'; });\n html += '<\/tr>\n<\/thead>\n<tbody>';<\/p>\n<p> axes.forEach(axis=>{\n html += '<\/p>\n<tr>\n<td>'+axis.label+'<\/td>\n<p>';\n picks.forEach(key=>{\n const mat = materials[key];\n html += '<\/p>\n<td>'+scoreHTML(mat.values[axis.key])+'<span class=\"pok-compare-comment\">'+(mat.notes[axis.key]||'')+'<\/span><\/td>\n<p>';\n });\n html += '<\/tr>\n<p>';\n });<\/p>\n<p> html += '<\/p>\n<tr>\n<td>Relative price level<\/td>\n<p>';\n picks.forEach(key=>{\n const mat = materials[key];\n html += '<\/p>\n<td><span class=\"pok-price-pill\">'+mat.price+'<\/span><span class=\"pok-compare-comment\">Indicative only: depends on the grade, filler content, color, batch and project requirements.<\/span><\/td>\n<p>';\n });\n html += '<\/tr>\n<p>';<\/p>\n<p> html += '<\/tbody>\n<\/table>\n<p>';\n tableWrap.innerHTML = html;\n }<\/p>\n<p> function getPicks(){\n const seen = new Set();\n const picks = [];\n selects.forEach(select=>{\n const val = select.value;\n if(val && materials[val] && !seen.has(val)){\n seen.add(val);\n picks.push(val);\n }\n });\n return picks.length ? picks : defaults.filter(Boolean);\n }<\/p>\n<p> function render(){\n const picks = getPicks();\n drawRadar(picks);\n buildLegend(picks);\n buildTable(picks);\n }<\/p>\n<p> fillSelects();\n selects.forEach(select=>select.addEventListener('change', render));\n if(reset){\n reset.addEventListener('click', ()=>{\n selects.forEach((select,index)=>{ select.value = defaults[index] || ''; });\n render();\n });\n }\n render();\n})();\n<\/script><\/p>\n<p><\/body><br \/>\n<\/html><\/p>","protected":false},"excerpt":{"rendered":"<p>Polyketone POK \/ PK \u2014 Exablend\u00ae POK for Friction, Chemical Contact and Precision Parts | Material Wizard A material platform for precision assemblies Polyketone POK \/ PK for friction, chemical contact and stable geometry Polyketone POK \/ PK is a high-performance semi-crystalline thermoplastic for parts whose service life is governed by friction, contact with liquids […]<\/p>\n","protected":false},"author":1,"featured_media":3723,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5085","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\n<title>Polyketone POK \/ PK Supplier \u2014 Exablend\u00ae 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color:#9a5e1e;\n font-weight:900;\n font-size:12px;\n}\n.pok-compare-note{\n margin-top:20px;\n padding:18px 20px;\n border:1px solid #d8e5eb;\n border-left:6px solid var(--gold);\n border-radius:0 22px 22px 0;\n background:#fff;\n}\n.pok-compare-note strong{\n display:block;\n color:var(--ink);\n font-size:18px;\n margin-bottom:6px;\n}\n.pok-compare-note p{\n margin:0;\n font-size:15px;\n line-height:1.6;\n color:#425968;\n}\n@media(max-width:1040px){\n .pok-compare-widget__head,.pok-compare-body{grid-template-columns:1fr}\n .pok-compare-controls{grid-template-columns:1fr 1fr}\n .pok-compare-reset{grid-column:1\/-1}\n}\n@media(max-width:760px){\n .pok-compare-table{min-width:860px;table-layout:auto}\n .pok-compare-table th:first-child,\n .pok-compare-table td:first-child{width:190px}\n}\n@media(max-width:640px){\n .pok-compare-widget{padding:20px;border-radius:26px}\n .pok-compare-controls,.pok-compare-mini{grid-template-columns:1fr}\n .pok-radar-card{padding:22px 12px}\n .pok-radar-chart{max-width:100%;}\n .pok-radar-title{display:block}\n .pok-radar-title span{display:block;margin-top:6px}\n}\n<\/style>\n<p><\/head><br \/>\n<body><\/p>\n<section class=\"hero\" id=\"top\" aria-label=\"Polyketone POK \/ PK for friction, chemical contact and stable geometry\"><video autoplay loop muted playsinline preload=\"auto\" poster=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/image-03-5f44921b.jpg\"><source src=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/video-01-8fe90c2e.mp4\" type=\"video\/mp4\"><\/video><\/p>\n<div class=\"hero-inner\">\n<div class=\"hero-copy\">\n<div class=\"kicker\">A material platform for precision assemblies<\/div>\n<h1>Polyketone POK \/ PK for friction, chemical contact and stable geometry<\/h1>\n<p class=\"lead\">Polyketone POK \/ PK is a high-performance semi-crystalline thermoplastic for parts whose service life is governed by friction, contact with liquids or lubricants, micro-clearance stability, low water absorption and predictable behavior after operating cycles. Exablend\u00ae POK is positioned as a material platform for gears, rollers, valves, metering units, pump elements, fuel-contact and chemically loaded components.<\/p>\n<div class=\"hero-badges\">\n<div class=\"hero-badge\"><b>Wear resistance<\/b><span>controlled condition of the working surface in the friction pair<\/span><\/div>\n<div class=\"hero-badge\"><b>Chemical resistance<\/b><span>lubricants, fuels, cleaning and industrial media<\/span><\/div>\n<div class=\"hero-badge\"><b>Low water absorption<\/b><span>lower risk of fit change in a moisture-exposed assembly<\/span><\/div>\n<div class=\"hero-badge\"><b>Stable clearance<\/b><span>repeatable travel after operating cycles<\/span><\/div>\n<\/div>\n<div class=\"actions\"><button class=\"btn primary\" onclick=\"openModal('request')\" type=\"button\">Send inquiry<\/button><button class=\"btn outline\" onclick=\"openModal('tds')\" type=\"button\">Download TDS<\/button><a class=\"btn call\" href=\"tel:+380503232321\">Call us<\/a><\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"what-is-pok\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">01 \u00b7 Material foundation<\/div>\n<h2>What Is Polyketone POK \/ PK and Why It Is Evaluated at the Assembly Level<\/h2>\n<p class=\"lead\">Polyketone is a semi-crystalline aliphatic polymer based on carbon monoxide and olefins. Its regular chain structure, polar carbonyl groups and dense morphology produce a combination valuable for moving parts: wear resistance, hydrolytic stability, low moisture dependence, chemical resistance and barrier behavior.<\/p>\n<\/div>\n<div class=\"grid2\">\n<div class=\"card\">\n<h3>Evaluation starts with the mechanism of function loss<\/h3>\n<p>A gear, roller, bushing, metering element or bearing component can lose its function gradually: the clearance changes, noise increases, wear particles appear, smoothness of travel deteriorates, or the surface swells after contact with water or a working fluid.<\/p>\n<p>POK is correctly considered for parts where friction, the operating environment, impact toughness, shrinkage and repeatable geometry form a single engineering problem.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Position among engineering polymers<\/h3>\n<p>PA6\/PA66 have a broad structural track record, but water often becomes a design factor. POM performs well in many dry gear drives, yet it does not always cover requirements for chemical or fuel contact. PBT is appropriate for housings and electrical components, but it is not always the optimal candidate for assemblies with intensive friction. PPS, PPA and PEEK are justified for higher temperature or chemical regimes, though they may create an over-specified solution.<\/p>\n<p>POK’s strong zone is a moving part in a liquid or chemical environment where stable clearance, controlled wear and predictable geometry matter.<\/p>\n<\/div>\n<\/div>\n<div class=\"kpi-row\">\n<div class=\"kpi\"><b>~220\u00b0C<\/b><span>typical melting temperature of the POK platform<\/span><\/div>\n<div class=\"kpi\"><b>0.4%<\/b><span>water absorption of Exablend\u00ae POK CF20 TRM at 23\u00b0C \/ 50% RH<\/span><\/div>\n<div class=\"kpi\"><b>17 000 MPa<\/b><span>tensile modulus of Exablend\u00ae POK GF50 S4<\/span><\/div>\n<div class=\"kpi\"><b>~10\u00b3 \u03a9<\/b><span>surface resistance of Exablend\u00ae POK CF20 TRM<\/span><\/div>\n<\/div>\n<div class=\"conclusion\"><strong>Section takeaway<\/strong><\/p>\n<p>POK should be positioned as a platform for managing assembly function: contact surface service life, fit stability, behavior after moisture or chemical exposure, and repeatability of series-production geometry.<\/p>\n<\/div>\n<\/section>\n<section class=\"pok-compare-section\" id=\"pok-material-comparison\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">02 \u00b7 Interactive Comparison<\/div>\n<h2>POK vs POM, PA6, PA66, PA12, PBT and PPS: An Honest Engineering Selection Map<\/h2>\n<p class=\"lead\">Polyketone is not the cheapest engineering plastic and should not be presented as a universal replacement for all materials. Its strong zone is parts where friction, chemical contact, moisture, stable clearance and service life act simultaneously. In this block, POK is compared with its closest engineering alternatives without hiding its weak points: in cost-effectiveness it is inferior to commodity PA, POM and PBT, but it often wins where part failure is driven by wear, moisture, chemical attack or unstable motion.<\/p>\n<\/p><\/div>\n<div class=\"pok-compare-widget\" data-pok-compare>\n<div class=\"pok-compare-widget__head\">\n<div>\n<h3>Select 2 materials or add a third one for comparison<\/h3>\n<p>The chart shows relative engineering suitability across 9 criteria. The rating does not replace testing of a specific grade in a real part, but it helps to quickly understand where POK is genuinely appropriate and where another polymer is more economical or technically logical.<\/p>\n<\/p><\/div>\n<div class=\"pok-compare-mini\" aria-label=\"Key comparison takeaways\">\n<div><b>POK \u2260 the cheapest<\/b><span>price is not its strong point<\/span><\/div>\n<div><b>POK is strong in the assembly<\/b><span>friction + chemicals + moisture + clearance<\/span><\/div>\n<div><b>PPS is higher in heat resistance<\/b><span>but that is a different price class<\/span><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"pok-compare-controls\">\n<div class=\"pok-compare-field\">\n <label for=\"pokCompare1\">Material 1<\/label><br \/>\n <select id=\"pokCompare1\" data-pok-compare-select=\"1\"><\/select>\n <\/div>\n<div class=\"pok-compare-field\">\n <label for=\"pokCompare2\">Material 2<\/label><br \/>\n <select id=\"pokCompare2\" data-pok-compare-select=\"2\"><\/select>\n <\/div>\n<div class=\"pok-compare-field\">\n <label for=\"pokCompare3\">Material 3<\/label><br \/>\n <select id=\"pokCompare3\" data-pok-compare-select=\"3\"><\/select>\n <\/div>\n<p> <button class=\"pok-compare-reset\" type=\"button\" data-pok-compare-reset>Reset<\/button>\n <\/div>\n<div class=\"pok-compare-body\">\n<div class=\"pok-radar-card\">\n<div class=\"pok-radar-title\">\n<h3>Property radar<\/h3>\n<p> <span>higher = stronger position<\/span>\n <\/div>\n<p> <svg class=\"pok-radar-chart\" viewBox=\"0 0 720 540\" role=\"img\" aria-label=\"Radar comparison of materials\" data-pok-radar><\/svg><\/p>\n<div class=\"pok-radar-legend\" data-pok-legend><\/div>\n<\/p><\/div>\n<div class=\"pok-table-card\">\n<div class=\"pok-compare-table-wrap\" data-pok-table><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"pok-compare-note\">\n <strong>How to read the rating<\/strong><\/p>\n<p>The “cost-effectiveness” criterion is an inverse cost indicator: the higher the score, the more economical the material in typical high-volume applications. That is why PA6, PA66, POM and PBT score stronger here than POK. For POK, what matters is not the lowest price per kilogram, but the reduced risk of wear, swelling, chemical degradation, unstable clearance or premature assembly failure.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n<section class=\"wrap\" id=\"exablend-pok-grades\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">Exablend\u00ae POK \u00b7 Product Grades<\/div>\n<h2>Polyketone grades for different part operating regimes<\/h2>\n<p class=\"lead\">After the initial assessment of the assembly, it is important to move from the general logic of POK to a specific grade. Exablend\u00ae POK includes glass-filled, mineral-filled and carbon-filled compounds for friction parts, chemical contact, stable geometry, high stiffness and precision molding.<\/p>\n<\/div>\n<div class=\"grid3\"><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-gf30-g2\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag green\">30% GF \u00b7 balanced stiffness<\/span><\/p>\n<h3>Exablend\u00ae POK GF30 G2<\/h3>\n<p>Glass-filled POK with 30% GF for technical parts that require a combination of stiffness, wear resistance, chemical resistance and dimensional stability.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-gf50-f4\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag green\">50% GF \u00b7 high rigidity<\/span><\/p>\n<h3>Exablend\u00ae POK GF50 F4<\/h3>\n<p>Highly filled POK with 50% glass fiber for structural parts where stiffness, strength, dimensional stability and performance under load are critical.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-gf50-s4\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag green\">50% GF \u00b7 low shrinkage<\/span><\/p>\n<h3>Exablend\u00ae POK GF50 S4<\/h3>\n<p>POK with 50% GF for high stiffness, low shrinkage, precision molding and series-production parts where repeatable geometry after cooling matters.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-mf25-s2\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag orange\">25% MF \u00b7 low warpage<\/span><\/p>\n<h3>Exablend\u00ae POK MF25 S2<\/h3>\n<p>Mineral-filled POK for precise functional parts, housings, pump and valve components that require wear resistance, surface quality and warpage control.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><a class=\"card\" href=\"https:\/\/materialwizard.com.ua\/exablend-pok-cf20trm\/\" style=\"text-decoration:none;color:inherit\"><span class=\"tag\">20% CF \u00b7 dimensional precision<\/span><\/p>\n<h3>Exablend\u00ae POK CF20 TRM<\/h3>\n<p>Carbon-filled POK with 20% CF for dimensional accuracy, fuel contact, barrier behavior and an electrically conductive surface profile in technical assemblies.<\/p>\n<p><strong style=\"color:#27775b\">Go to product page \u2192<\/strong><\/a><\/div>\n<div class=\"conclusion\"><strong>How to use this block<\/strong><\/p>\n<p>If the technical specification is not yet detailed, selection should not start from the GF or CF percentage alone. First, define the part’s operating regime: the friction pair, environment, temperature, tolerances, shrinkage, surface requirements, electrical profile and geometry stability over cycles.<\/p>\n<\/div>\n<\/section>\n<section class=\"premium\" id=\"strengths\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">02 \u00b7 POK Strengths<\/div>\n<h2>The advantages of polyketone emerge in the combination of properties<\/h2>\n<p class=\"lead\">What matters to a technical decision-maker is not a list of characteristics but the risk the material removes from the part: clearance change after moisture, wear in liquid, gear-mesh noise, wall permeability, degradation after media contact or molding instability.<\/p>\n<\/div>\n<div class=\"grid4\">\n<div class=\"card\">\n<h3>Tribology<\/h3>\n<p>In a gear drive, wear means a change of tooth profile, backlash, noise, local heating and a growing amount of wear particles.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Chemical contact<\/h3>\n<p>The material is assessed by retention of mass, surface, strength, travel and dimensions after exposure to a specific medium.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Moisture and hydrolysis<\/h3>\n<p>Low moisture dependence reduces the risk of fit change, jamming, unstable actuation force and increasing noise.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Barrier behavior<\/h3>\n<p>In fuel, gas and metering systems, permeability, sorption and wall stability can be as critical as strength.<\/p>\n<\/div>\n<\/div>\n<div class=\"wear-grid\" id=\"wear-comparison\">\n<div class=\"wear-card\">\n<div class=\"eyebrow\">Tribological comparison<\/div>\n<h3>Wear index comparison of POK, PA and POM<\/h3>\n<p>Polyketone demonstrates pronounced wear resistance compared with traditional engineering plastics. In the comparative data presented, the wear index of POK is taken as 3 arbitrary units, PA as 8 and POM as 30. The lower the value, the lower the wear under comparable test conditions.<\/p>\n<p>In practical terms, this means POK can outperform POM by roughly a factor of 10 and polyamides by roughly a factor of 3 in wear resistance. For a series-production part, such data must be confirmed on the real friction pair, speed, pressure, temperature and presence of contaminant particles.<\/p>\n<div class=\"wear-data\">\n<div><b>3<\/b><span>POK \/ Exablend\u00ae POK<br \/>low wear index<\/span><\/div>\n<div><b>8<\/b><span>PA \/ polyamide<br \/>medium wear index<\/span><\/div>\n<div><b>30<\/b><span>POM \/ acetal<br \/>high wear index<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"wear-card\"><svg class=\"wear-svg\" viewBox=\"0 0 760 520\" role=\"img\"><title>Wear index comparison of POK, PA and POM<\/title><rect x=\"0\" y=\"0\" width=\"760\" height=\"520\" fill=\"#ffffff\"\/><text x=\"380\" y=\"42\" text-anchor=\"middle\" font-size=\"24\" font-weight=\"900\" fill=\"#07131b\">Wear comparison of POK, PA and POM<\/text><text x=\"380\" y=\"70\" text-anchor=\"middle\" font-size=\"14\" fill=\"#60717d\">wear index, arbitrary units \u00b7 lower = better<\/text><g stroke=\"#d8e5eb\" stroke-width=\"1\"><line x1=\"90\" y1=\"410\" x2=\"690\" y2=\"410\"\/><line x1=\"90\" y1=\"340\" x2=\"690\" y2=\"340\"\/><line x1=\"90\" y1=\"270\" x2=\"690\" y2=\"270\"\/><line x1=\"90\" y1=\"200\" x2=\"690\" y2=\"200\"\/><line x1=\"90\" y1=\"130\" x2=\"690\" y2=\"130\"\/><\/g><g fill=\"#60717d\" font-size=\"13\"><text x=\"70\" y=\"414\" text-anchor=\"end\">0<\/text><text x=\"70\" y=\"344\" text-anchor=\"end\">7<\/text><text x=\"70\" y=\"274\" text-anchor=\"end\">14<\/text><text x=\"70\" y=\"204\" text-anchor=\"end\">21<\/text><text x=\"70\" y=\"134\" text-anchor=\"end\">28<\/text><\/g><line x1=\"90\" y1=\"410\" x2=\"690\" y2=\"410\" stroke=\"#405967\" stroke-width=\"2\"\/><line x1=\"90\" y1=\"110\" x2=\"90\" y2=\"410\" stroke=\"#405967\" stroke-width=\"2\"\/><rect x=\"170\" y=\"380\" width=\"110\" height=\"30\" rx=\"8\" fill=\"#117a2e\"\/><rect x=\"325\" y=\"330\" width=\"110\" height=\"80\" rx=\"8\" fill=\"#ffe600\"\/><rect x=\"480\" y=\"110\" width=\"110\" height=\"300\" rx=\"8\" fill=\"#ffa51e\"\/><g fill=\"#07131b\" font-size=\"18\" font-weight=\"900\"><text x=\"225\" y=\"372\" text-anchor=\"middle\">3<\/text><text x=\"380\" y=\"322\" text-anchor=\"middle\">8<\/text><text x=\"535\" y=\"102\" text-anchor=\"middle\">30<\/text><\/g><g fill=\"#07131b\" font-size=\"15\" font-weight=\"900\"><text x=\"225\" y=\"444\" text-anchor=\"middle\">POK<\/text><text x=\"380\" y=\"444\" text-anchor=\"middle\">PA<\/text><text x=\"535\" y=\"444\" text-anchor=\"middle\">POM<\/text><\/g><text x=\"390\" y=\"486\" text-anchor=\"middle\" font-size=\"14\" fill=\"#60717d\">Wear index, arbitrary units. A lower value means less wear.<\/text><\/svg><\/div>\n<\/div>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Test<\/th>\n<th>POK \/ Exablend\u00ae<\/th>\n<th>POM \/ acetal<\/th>\n<th>PA66<\/th>\n<th>Engineering interpretation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Taber abrasion test<sup>1<\/sup><\/strong><\/td>\n<td class=\"good\">\u2191\u2191 very low wear<\/td>\n<td>high wear<\/td>\n<td class=\"limit\">failure or severe damage<\/td>\n<td>Simulates surface abrasion typical of friction with dust, sand or microparticles.<\/td>\n<\/tr>\n<tr>\n<td><strong>ASTM D-3702 PV limit<sup>2<\/sup><\/strong><\/td>\n<td class=\"good\">highest level<\/td>\n<td>medium<\/td>\n<td class=\"limit\">low<\/td>\n<td>A key parameter for dynamic friction assemblies where pressure and speed generate the thermal load.<\/td>\n<\/tr>\n<tr>\n<td><strong>Bevel-gear wear test<sup>3<\/sup><\/strong><\/td>\n<td class=\"good\">almost no wear<\/td>\n<td>significant damage<\/td>\n<td>significant damage<\/td>\n<td>Allows assessment of long-term performance under gear-tooth contact conditions.<\/td>\n<\/tr>\n<tr>\n<td><strong>Pin-on-Disk<sup>4<\/sup><\/strong><\/td>\n<td class=\"good\">low wear<\/td>\n<td>higher<\/td>\n<td>higher<\/td>\n<td>Shows surface resistance to sliding friction in a controlled contact configuration.<\/td>\n<\/tr>\n<tr>\n<td><strong>Friction noise coefficient<sup>5<\/sup><\/strong><\/td>\n<td class=\"good\">\u221216% vs POM<\/td>\n<td>baseline level<\/td>\n<td>depends on humidity and the friction pair<\/td>\n<td>Characterizes undesirable acoustic effects arising from contact between materials.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"table-notes\"><strong>Notes to the table<\/strong><\/p>\n<ol class=\"table-notes-list\">\n<li><b>The Taber abrasion test<\/b> simulates abrasion with dust, sand and microparticles.<\/li>\n<li><b>PV limit<\/b> describes the limiting combination of pressure and speed in a friction assembly.<\/li>\n<li><b>The bevel-gear wear test<\/b> is useful for assessing wear in gear drives.<\/li>\n<li><b>Pin-on-Disk<\/b> shows sliding friction in a controlled contact configuration.<\/li>\n<li><b>Friction noise<\/b> matters for drives, metering units, household appliances and mechanisms with acoustic requirements.<\/li>\n<\/ol>\n<\/div>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Chemical<\/th>\n<th>Duration<\/th>\n<th>Mass change, %<\/th>\n<th>Strength loss, %<\/th>\n<th>Comment<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Acetic acid 5%<\/strong><\/td>\n<td>365 days<\/td>\n<td>+2.8<\/td>\n<td>\u22128<\/td>\n<td>No change in appearance.<\/td>\n<\/tr>\n<tr>\n<td><strong>Acetone 100%<\/strong><\/td>\n<td>365 days<\/td>\n<td>+4.7<\/td>\n<td>\u221210<\/td>\n<td>Slight yellowing.<\/td>\n<\/tr>\n<tr>\n<td><strong>Benzene 1%, BTX mixture<\/strong><\/td>\n<td>120 days<\/td>\n<td>0<\/td>\n<td>\u22121\u2026\u22125<\/td>\n<td>Geometry retained.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ammonium hydroxide 10%<\/strong><\/td>\n<td>365 days<\/td>\n<td>\u22124.0<\/td>\n<td>\u221213<\/td>\n<td>Darkening; structure stable.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ethylene glycol-based antifreeze<\/strong><\/td>\n<td>730 days<\/td>\n<td>+0.6<\/td>\n<td>\u22127<\/td>\n<td>Full integrity.<\/td>\n<\/tr>\n<tr>\n<td><strong>Chloroform 100%<\/strong><\/td>\n<td>730 days<\/td>\n<td>+25.4<\/td>\n<td>\u221225<\/td>\n<td><span class=\"limit\">Swelling; not recommended without separate validation.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Media type<\/th>\n<th>POK resistance<\/th>\n<th>Application comment<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Aliphatic hydrocarbons<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>Hexane, octane, diesel \u2014 usually no significant changes after testing.<\/td>\n<\/tr>\n<tr>\n<td><strong>Aromatic hydrocarbons<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Toluene, xylene \u2014 slight yellowing possible; confirmation at operating temperature is required.<\/td>\n<\/tr>\n<tr>\n<td><strong>Alcohols and glycols<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>Ethanol, antifreeze \u2014 a strong zone for liquid contact.<\/td>\n<\/tr>\n<tr>\n<td><strong>Ketones, ethers, esters<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Acetone, ethyl acetate \u2014 moderate swelling possible.<\/td>\n<\/tr>\n<tr>\n<td><strong>Weak and medium-strength acids<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Strength retention depends on concentration, temperature and contact time.<\/td>\n<\/tr>\n<tr>\n<td><strong>Alkalis and salts<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>NaOH, NH\u2084OH, CaCl\u2082 \u2014 stability under moderate regimes after formulation verification.<\/td>\n<\/tr>\n<tr>\n<td><strong>Water, humidity and aqueous media<\/strong><\/td>\n<td class=\"good\">\u2605\u2605\u2605\u2605\u2605<\/td>\n<td>Low water absorption and better dimensional stability compared with polyamides. Contact with steam or hot aqueous media requires verification for temperature, pressure and cycle duration.<\/td>\n<\/tr>\n<tr>\n<td><strong>Detergents and enzymes<\/strong><\/td>\n<td class=\"warn\">\u2605\u2605\u2605\u2605\u2606<\/td>\n<td>Slight discoloration possible; function is verified in the actual formulation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"engineering-logic\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">03 \u00b7 Assembly Engineering Logic<\/div>\n<h2>How POK works in an assembly: friction, moisture, chemicals and stable clearance<\/h2>\n<p class=\"lead\">This block shows the regimes in which POK should be tested first: a moving part, liquid contact, micro-clearance stability, water absorption, wear and geometry repeatability over cycles.<\/p>\n<\/div>\n<div class=\"grid3\">\n<div class=\"card\">\n<h3>Selection map<\/h3>\n<p>POK is not presented as a universal material. It should be included in testing first when the part is moving, contacts a liquid, has a critical clearance or shows PA\/POM risks in the real geometry.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Water absorption<\/h3>\n<p>In wet assemblies, POK reduces the risk of fit change and travel stability issues compared with polyamides, but actual behavior must be verified on the specific grade and geometry.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Metering systems<\/h3>\n<p>For metering units, valves and pump components, what matters is small precision mechanics, chemical contact, repeatable travel, surface cleanliness and micro-clearance stability.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"reinforced-pok-checklist\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">04 \u00b7 Reinforced Grades<\/div>\n<h2>What to verify in GF\/CF POK grades<\/h2>\n<p class=\"lead\">Reinforcement increases stiffness and dimensional stability under load. For a series-production part, it is important to verify the behavior of the specific geometry in the melt flow and after cooling.<\/p>\n<\/div>\n<div class=\"check-grid\">\n<div class=\"check-card\"><i>1<\/i><strong>Flow direction<\/strong><\/p>\n<p>fiber orientation relative to mating surfaces<\/p>\n<\/div>\n<div class=\"check-card\"><i>2<\/i><strong>Weld lines<\/strong><\/p>\n<p>strength and appearance at flow weld locations<\/p>\n<\/div>\n<div class=\"check-card\"><i>3<\/i><strong>Shrinkage<\/strong><\/p>\n<p>shrinkage along and across the flow direction<\/p>\n<\/div>\n<div class=\"check-card\"><i>4<\/i><strong>Trial molding<\/strong><\/p>\n<p>actual geometry after cycle stabilization<\/p>\n<\/div>\n<div class=\"check-card\"><i>5<\/i><strong>Functional test<\/strong><\/p>\n<p>fit, clearance, noise and actuation force in the real assembly<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"band\" id=\"not-use\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">05 \u00b7 Application Limits<\/div>\n<h2>When POK is technically excessive or carries a high risk of mismatch<\/h2>\n<p class=\"lead\">Honest positioning of a premium material separates the tasks where POK removes risk from products where another polymer is more rational or a higher temperature class is required.<\/p>\n<\/div>\n<div class=\"grid2\">\n<div class=\"risk-list\">\n<div class=\"risk\"><i>1<\/i><\/p>\n<div><strong>A dry mechanism already meets its service life<\/strong><span>If POM or PA run reliably without water, chemicals, noise or precision fits, switching to POK may not create a noticeable economic effect.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>2<\/i><\/p>\n<div><strong>A static housing without contact media<\/strong><span>For a housing without friction, permeability or liquid contact, PBT, PA or PC\/ABS often look more rational.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>3<\/i><\/p>\n<div><strong>Sustained high temperature<\/strong><span>For multi-year operation at elevated temperature under load, PPA, PPS or PEEK become the first candidates.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>4<\/i><\/p>\n<div><strong>Extreme chemistry<\/strong><span>For strong oxidizers, concentrated acids, aggressive solvent mixtures or prolonged contact at elevated temperature, POK should not be specified without dedicated testing.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>5<\/i><\/p>\n<div><strong>Complex reinforced geometry<\/strong><span>Long ribs, abrupt wall-thickness transitions, critical weld lines and asymmetric flow increase the need to verify shape stability.<\/span><\/div>\n<\/div>\n<div class=\"risk\"><i>6<\/i><\/p>\n<div><strong>Regulated contact<\/strong><span>Food, drinking-water or medical contact requires separate confirmation of the grade and its regulatory basis.<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"card\">\n<h3>How to make the decision<\/h3>\n<p>The question should be: which risk in the assembly costs more than the difference in material price? If mechanism stoppage, noise, wear in liquid, unstable clearance or permeability are critical, POK should be included in the test matrix.<\/p>\n<p>If the primary requirement is the lowest price, sustained high temperature or extreme chemistry, material selection should start from a different polymer group.<\/p>\n<\/div>\n<\/div>\n<div class=\"conclusion\"><strong>Section takeaway<\/strong><\/p>\n<p>POK is not a universal answer for every part. Its strong role emerges where a standard polymer gradually loses function, while a high-temperature material creates an over-specified solution.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"dark\" id=\"processing\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">06 \u00b7 POK Processing<\/div>\n<h2>Polyketone processing is part of the material solution<\/h2>\n<p class=\"lead\">The properties of POK in a part depend on drying, barrel cleanliness, melt residence time, temperature profile, mold temperature, pressure, injection speed, flow direction, weld lines and the actual shrinkage in a specific mold.<\/p>\n<\/div>\n<div class=\"grid2\">\n<div class=\"card\">\n<h3>GF30 \/ GF50 S4 \/ MF25<\/h3>\n<p>Typical molding profile: 220 \u2192 245\u00b0C, mold temperature around 80\u00b0C, pressure 80\u2013130 MPa, medium to high injection speed. For glass-filled grades, controlling fiber orientation and differential shrinkage is critical.<\/p>\n<div class=\"temp-profile\">\n<div class=\"temp\"><small>Zone 1<\/small><b>220<\/b><\/div>\n<div class=\"temp\"><small>Zone 2<\/small><b>225<\/b><\/div>\n<div class=\"temp\"><small>Zone 3<\/small><b>230<\/b><\/div>\n<div class=\"temp\"><small>Zone 4<\/small><b>235<\/b><\/div>\n<div class=\"temp\"><small>Adapter<\/small><b>240<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 1<\/small><b>245<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 2<\/small><b>245<\/b><\/div>\n<\/div>\n<\/div>\n<div class=\"card\">\n<h3>MW-010GP \/ CF20 TRM \/ GF50 F4<\/h3>\n<p>The unfilled grade offers a wider processing window for injection molding and extrusion. CF20 TRM requires careful control of fiber, surface quality and electrical profile. GF50 F4 can run at higher temperatures in the final zones but requires residence time control.<\/p>\n<div class=\"temp-profile\">\n<div class=\"temp\"><small>Zone 1<\/small><b>180<\/b><\/div>\n<div class=\"temp\"><small>Zone 2<\/small><b>190<\/b><\/div>\n<div class=\"temp\"><small>Zone 3<\/small><b>200<\/b><\/div>\n<div class=\"temp\"><small>Zone 4<\/small><b>210<\/b><\/div>\n<div class=\"temp\"><small>Adapter<\/small><b>220<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 1<\/small><b>230<\/b><\/div>\n<div class=\"temp\"><small>Nozzle 2<\/small><b>240<\/b><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid3\" style=\"margin-top:24px\">\n<div class=\"card\">\n<h3>Drying<\/h3>\n<p>GF30: 4\u20136 h at 90\u2013110\u00b0C down to 0.02%. GF50 S4\/MF25: 2\u20133 h at 90\u2013110\u00b0C down to 0.02%. MW-010GP: 4\u20136 h at 80\u201390\u00b0C down to below 0.1%.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Melt residence time<\/h3>\n<p>Excessive temperature and prolonged residence in the barrel or hot runner can cause dark specks, viscosity changes, surface degradation and an unstable production run.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Equipment purging<\/h3>\n<p>Purging with polyolefins is advisable before and after POK. Particular attention is required after POM, PA and unknown colorants or additives.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"expertise\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">07 \u00b7 Material Wizard expertise<\/div>\n<h2>Material Wizard as the technical center for material decision-making<\/h2>\n<p class=\"lead\">The company’s role is to match the part’s failure mechanism to a material family, select an Exablend\u00ae POK grade, assess processing, run application testing and bring the solution to a stable production run.<\/p>\n<\/div>\n<div class=\"grid3\">\n<div class=\"card\">\n<h3>1. Assembly diagnostics<\/h3>\n<p>Friction pair, environment, temperature, cycle life, noise, tolerances, expected economics of failure.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>2. Material family selection<\/h3>\n<p>POK is compared with PA, POM, PBT, PPA, PPS and PEEK by the risk of functional failure.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>3. Exablend\u00ae formulation<\/h3>\n<p>Unfilled, glass-filled, carbon-filled, mineral-filled, conductive or specially modified formulations.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>4. Processing validation<\/h3>\n<p>Drying, temperature profile, pressure, weld lines, residence time, purging and actual mold stability.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>5. In-part testing<\/h3>\n<p>Friction, noise, fit, chemicals, moisture, thermal cycling, service life, repeatability, comparison with the current material.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>6. Series stabilization<\/h3>\n<p>Batch control, processing recommendations, formulation adjustments, support during launch and scale-up.<\/p>\n<\/div>\n<\/div>\n<div class=\"conclusion\"><strong>Overall conclusion<\/strong><\/p>\n<p>The POK landing page should demonstrate engineering confidence: Material Wizard understands the environment, loads, processing, alternatives and the economics of a series-production part.<\/p>\n<\/div>\n<\/section>\n<section class=\"band\" id=\"faq\">\n<div class=\"wrap\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">Engineer’s questions<\/div>\n<h2>FAQ about polyketone POK \/ PK<\/h2>\n<p class=\"lead\">Brief answers for initial material screening before a technical consultation and testing in a specific part.<\/p>\n<\/div>\n<div class=\"faq-list\">\n<details class=\"faq-item\">\n<summary>What is polyketone POK \/ PK?<\/summary>\n<p>POK \/ PK is a high-performance semi-crystalline thermoplastic with a strong position in friction assemblies, chemical contact, moisture, fuel and metering environments.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>How does POK differ from POM?<\/summary>\n<p>POM is often strong in dry mechanisms. POK is worth testing when friction is combined with chemicals, water, fuel, micro-clearance stability, noise or barrier behavior.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>When is POK better than PA66?<\/summary>\n<p>POK has a practical advantage where the water absorption of PA66 can affect fit, clearance, noise, actuation force or dimensional stability after conditioning.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Is POK suitable for friction parts?<\/summary>\n<p>Yes, but the decision is made after verifying the actual friction pair, speed, pressure, lubricant, contact temperature, wear particles and noise after cycling.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>When should POK not be used?<\/summary>\n<p>POK may be excessive for simple static housings, dry assemblies already running reliably on POM, or parts exposed to sustained high temperatures of the PPS\/PPA\/PEEK class.<\/p>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wrap\" id=\"related-materials\">\n<div class=\"section-title\">\n<div class=\"eyebrow\">Material architecture<\/div>\n<h2>Related material solutions<\/h2>\n<p class=\"lead\">POK should be considered together with alternatives and neighboring material families so that the choice is technically and economically justified.<\/p>\n<\/div>\n<div class=\"link-grid\"><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/pom\/\">POM \/ polyoxymethylene<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/polyamides\/injection-grade\/\">PA66<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/pbt-pk-abs-ps\/polibutilentereftalat\/\">PBT<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/high-performance-polymers\/pps-psu-pok-peek-tpee\/\">PPS \/ PSU \/ PEEK<\/a><a class=\"link-card\" href=\"https:\/\/materialwizard.com.ua\/polyamides\/ppa\/\">PPA<\/a><a class=\"link-card\" href=\"#\" onclick=\"openModal('request');return false;\">Polymer selection for your part<\/a><a class=\"link-card\" href=\"#\" onclick=\"openModal('request');return false;\">Compound development<\/a><a class=\"link-card\" href=\"#\" onclick=\"openModal('tds');return false;\">Exablend\u00ae POK grades<\/a><\/div>\n<\/section>\n<section class=\"wrap\">\n<div class=\"footer-cta\">\n<div>\n<div class=\"eyebrow\" style=\"color:#b8d8e8\">Engineering support<\/div>\n<h2>Select Exablend\u00ae POK for your part<\/h2>\n<p>A correct selection requires the friction pair, environment, tolerances, service life, geometry, processing method, expected failure mechanism and the economics of failure.<\/p>\n<\/div>\n<div>\n<div class=\"btns\"><button class=\"btn primary\" onclick=\"openModal('request')\" type=\"button\">Send an inquiry<\/button><button class=\"btn outline\" onclick=\"openModal('tds')\" type=\"button\">Download TDS<\/button><\/div>\n<p style=\"color:#cbd7de;margin-top:16px\">The values on this page are provided as typical reference points. The final decision is made after testing a specific grade in the part geometry.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<p><button aria-label=\"Scroll to top\" class=\"floating-top\" id=\"scrollTopBtn\" title=\"Top\">\u2191<\/button><\/p>\n<div class=\"modal-backdrop\" hidden id=\"modal-backdrop\" onclick=\"closeModal(event)\">\n<div class=\"modal\" onclick=\"event.stopPropagation()\" role=\"dialog\" aria-modal=\"true\"><button class=\"modal-close\" onclick=\"closeModal()\" type=\"button\">\u00d7<\/button><\/p>\n<div class=\"modal-panel\" hidden id=\"modal-tds\">\n<div class=\"modal-head\"><span>TDS \u00b7 Exablend\u00ae POK<\/span><\/p>\n<h2>Select the grade PDF file<\/h2>\n<p>Select the TDS for the required Exablend\u00ae POK grade. If the grade is not obvious, send a technical inquiry describing the part, environment, temperature, friction pair, tolerances and current material.<\/p>\n<\/div>\n<div class=\"tds-grid\"><a class=\"tds-card\" download=\"polyketone-mw-010gp.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-01-830149d8.pdf\"><span class=\"filetype\">PDF<\/span><strong>Polyketone MW-010GP<\/strong><small>unfilled POK \u00b7 flowability, impact toughness, low friction<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-gf30-g2.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-02-2a96b5f0.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK GF30 G2<\/strong><small>30% GF \u00b7 stiffness, wear resistance, dimensional stability<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-gf50-s4.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-03-ccf22653.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK GF50 S4<\/strong><small>50% GF \u00b7 high stiffness, low shrinkage, precision parts<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-gf50-f4.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-04-b2c5dbd4.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK GF50 F4<\/strong><small>50% GF \u00b7 high stiffness, functional parts<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-cf20-trm.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-05-a68b3c38.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK CF20 TRM<\/strong><small>20% CF \u00b7 fuel contact, barrier properties, dimensional accuracy<\/small><em>Download TDS<\/em><\/a><a class=\"tds-card\" download=\"exablend-pok-mf25-s2.pdf\" href=\"https:\/\/materialwizard.com.ua\/wp-content\/uploads\/2026\/05\/tds-06-fc9b6e3e.pdf\"><span class=\"filetype\">PDF<\/span><strong>Exablend\u00ae POK MF25 S2<\/strong><small>25% MF \u00b7 wear parts, pumps, valves<\/small><em>Download TDS<\/em><\/a><\/div>\n<\/div>\n<div class=\"modal-panel\" hidden id=\"modal-request\">\n<div class=\"modal-head\"><span>Technical inquiry<\/span><\/p>\n<h2>Send an inquiry about Exablend\u00ae POK<\/h2>\n<p>Describe the part, contact environment, temperature, friction pair, tolerances, current material and expected volume. This helps us select a POK grade faster or propose an alternative polymer family.<\/p>\n<\/div>\n<div class=\"actions\"><a class=\"btn primary\" href=\"mailto:info@materialwizard.com.ua?subject=\u0417\u0430\u043f\u0438\u0442 \u0449\u043e\u0434\u043e Exablend POK\">Write an email<\/a><button class=\"btn call\" onclick=\"copyEmail()\" type=\"button\">Copy info@materialwizard.com.ua<\/button><\/div>\n<p aria-live=\"polite\" id=\"copy-status\">\n<\/div>\n<\/div>\n<\/div>\n<p><script>function openModal(type){const b=document.getElementById('modal-backdrop'),t=document.getElementById('modal-tds'),r=document.getElementById('modal-request');if(!b||!t||!r)return false;t.hidden=type!=='tds';r.hidden=type!=='request';b.hidden=false;document.documentElement.style.overflow='hidden';return false}function closeModal(){const b=document.getElementById('modal-backdrop');if(b){b.hidden=true;document.documentElement.style.overflow=''}}async function copyEmail(){const email='info@materialwizard.com.ua',s=document.getElementById('copy-status');try{await navigator.clipboard.writeText(email);if(s)s.textContent='Email copied: '+email}catch(e){if(s)s.textContent='Copy the email manually: '+email}}document.addEventListener('keydown',e=>{if(e.key==='Escape')closeModal()});(function(){const btn=document.getElementById('scrollTopBtn');if(!btn)return;const onScroll=()=>{window.scrollY>500?btn.classList.add('show'):btn.classList.remove('show')};window.addEventListener('scroll',onScroll,{passive:true});onScroll();btn.addEventListener('click',e=>{e.preventDefault();window.scrollTo({top:90,behavior:'smooth'})\/* UA fix: the button returns slightly below the absolute top *\/})})();<\/script><\/p>\n<p><script id=\"pok-interactive-compare-js\">\n(function(){\n const root = document.querySelector('[data-pok-compare]');\n if(!root) return;<\/p>\n<p> const axes = [\n {key:'wear', label:'Wear resistance', radar:'Wear'},\n {key:'friction', label:'Low friction', radar:'Friction'},\n {key:'chem', label:'Chemical resistance', radar:'Chemicals'},\n {key:'moisture', label:'Moisture stability', radar:'Moisture'},\n {key:'stiffness', label:'Stiffness', radar:'Stiffness'},\n {key:'impact', label:'Impact \/ toughness', radar:'Impact'},\n {key:'heat', label:'Heat resistance', radar:'Heat'},\n {key:'processing', label:'Processability', radar:'Processing'},\n {key:'price', label:'Cost affordability', radar:'Price'}\n ];<\/p>\n<p> const materials = {\n pok: {\n name:'POK \/ Polyketone',\n color:'#0d8d74',\n price:'$$$\u2013$$$$',\n values:{wear:5,friction:5,chem:5,moisture:5,stiffness:3.5,impact:4,heat:4,processing:4,price:2},\n notes:{\n wear:'POK\u2019s strong zone: gears, rollers, bushings, pump and metering assemblies.',\n friction:'Smooth motion and low wear in moving parts.',\n chem:'Strong resistance to fuels, lubricants, detergents and industrial media.',\n moisture:'Lower risk of fit and clearance changes than PA6\/PA66.',\n stiffness:'Base POK is moderate; GF\/CF grades sharply increase stiffness.',\n impact:'Good toughness in unfilled and moderately filled grades.',\n heat:'Good level for an engineering plastic, but PPS\/PPA\/PEEK are higher.',\n processing:'Requires discipline in drying and equipment purging, but processes well.',\n price:'Weaker than commodity PA\/POM\/PBT; the choice is justified by service life and reduced failure risk.'\n }\n },\n pom: {\n name:'POM \/ Acetal',\n color:'#d99a2b',\n price:'$$',\n values:{wear:4,friction:5,chem:3,moisture:4,stiffness:3,impact:3,heat:2.5,processing:5,price:4},\n notes:{\n wear:'A strong material for many dry mechanisms, but does not always win in a contaminated or chemical assembly.',\n friction:'One of POM\u2019s strengths \u2014 sliding and stable operation in dry drives.',\n chem:'Limited in a number of chemical environments; compatibility control is required.',\n moisture:'Good dimensional stability compared with PA.',\n stiffness:'Moderate structural stiffness.',\n impact:'Usually lower than tough engineering materials.',\n heat:'Thermal limit lower than POK, PA66, PBT and PPS.',\n processing:'Highly processable and familiar for series molding.',\n price:'Usually more economical than POK.'\n }\n },\n pa6: {\n name:'PA6',\n color:'#2d6cdf',\n price:'$\u2013$$',\n values:{wear:3,friction:3,chem:3,moisture:2,stiffness:3.5,impact:4,heat:3,processing:5,price:5},\n notes:{\n wear:'A workable level for many technical parts, but not a leader in tribology.',\n friction:'Sliding assemblies often require modification or lubrication.',\n chem:'Moderate chemical resistance, depending on the environment and conditioning.',\n moisture:'Strong moisture dependence \u2014 a factor in calculating fits and dimensions.',\n stiffness:'GF grades provide good stiffness.',\n impact:'Good impact strength, especially in modified grades.',\n heat:'A normal engineering level, but lower than high-temperature polymers.',\n processing:'Widely established and convenient for mass molding.',\n price:'One of the most economical options.'\n }\n },\n pa66: {\n name:'PA66',\n color:'#6f58c9',\n price:'$$',\n values:{wear:3,friction:3,chem:3,moisture:2,stiffness:4,impact:3.5,heat:4,processing:4,price:4},\n notes:{\n wear:'A good structural material, but in friction and moisture it does not always cover the task without modification.',\n friction:'Moderate level; sliding often requires special formulations.',\n chem:'A good but not universal resistance profile.',\n moisture:'Water absorption affects dimensions, modulus, fits and noise.',\n stiffness:'GF grades provide high load-bearing capacity.',\n impact:'A good level, but depends on the grade and moisture content.',\n heat:'Better than PA6, often strong in automotive components.',\n processing:'Widely established in mass production, but requires drying control.',\n price:'Usually more economical than POK and PA12.'\n }\n },\n pa12: {\n name:'PA12',\n color:'#2496a8',\n price:'$$$\u2013$$$$',\n values:{wear:3,friction:3,chem:3.5,moisture:4,stiffness:2.5,impact:4,heat:3,processing:4,price:2},\n notes:{\n wear:'Not POK\u2019s main tribological competitor, but good in flexible and stable parts.',\n friction:'A moderate level for sliding.',\n chem:'A good resistance profile in a range of media.',\n moisture:'Significantly more stable than PA6\/PA66 with respect to moisture.',\n stiffness:'Lower than PA66, PBT and reinforced POK.',\n impact:'Good toughness and stability at low temperatures.',\n heat:'A moderate temperature level.',\n processing:'Processes well, but requires proper drying.',\n price:'Priced close to the premium segment, so not always more economical than POK.'\n }\n },\n pbt: {\n name:'PBT',\n color:'#8a9b2f',\n price:'$$',\n values:{wear:2.5,friction:2.5,chem:4,moisture:4,stiffness:3.5,impact:2.5,heat:4,processing:5,price:4},\n notes:{\n wear:'Not a primary material for intensive tribology.',\n friction:'In sliding assemblies it falls behind POM and POK without special modifications.',\n chem:'A strong profile in housing and electrical applications.',\n moisture:'Good dimensional stability compared with PA.',\n stiffness:'GF grades provide good stiffness and stability.',\n impact:'Usually weaker than PA and POK in toughness.',\n heat:'A good level for electrical and housing applications.',\n processing:'A highly processable material for series molding.',\n price:'Usually more economical than POK.'\n }\n },\n pps: {\n name:'PPS',\n color:'#963232',\n price:'$$$$$',\n values:{wear:4,friction:3.5,chem:5,moisture:5,stiffness:4.5,impact:2.5,heat:5,processing:3,price:1},\n notes:{\n wear:'A strong material for high temperatures and chemicals, but not always needed for moderate regimes.',\n friction:'A good level, especially in special modifications.',\n chem:'One of the strongest positions among structural thermoplastics.',\n moisture:'Very stable in humid conditions.',\n stiffness:'High stiffness, especially in GF grades.',\n impact:'Can be more brittle than PA\/POK\/PA12.',\n heat:'Stronger than POK in high-temperature service.',\n processing:'More complex and demanding than PA\/POM\/PBT\/POK.',\n price:'The weakest cost affordability in this comparison.'\n }\n }\n };<\/p>\n<p> const defaults = ['pok','pom',''];\n const selects = Array.from(root.querySelectorAll('[data-pok-compare-select]'));\n const radar = root.querySelector('[data-pok-radar]');\n const legend = root.querySelector('[data-pok-legend]');\n const tableWrap = root.querySelector('[data-pok-table]');\n const reset = root.querySelector('[data-pok-compare-reset]');<\/p>\n<p> function fillSelects(){\n selects.forEach((select, index)=>{\n const options = Object.keys(materials).map(key => '<option value=\"'+key+'\">'+materials[key].name+'<\/option>').join('');\n if(index === 2){\n select.innerHTML = '<option value=\"\">\u2014 do not select a third material \u2014<\/option>' + options;\n }else{\n select.innerHTML = options;\n }\n select.value = defaults[index] || '';\n });\n }<\/p>\n<p> function polarPoint(cx, cy, r, index, total){\n const angle = -Math.PI\/2 + (Math.PI*2*index\/total);\n return [cx + Math.cos(angle)*r, cy + Math.sin(angle)*r];\n }<\/p>\n<p> function polygonFor(mat){\n const cx=360, cy=270, maxR=185;\n return axes.map((axis, i)=>{\n const score = materials[mat].values[axis.key] || 0;\n const p = polarPoint(cx, cy, maxR*(score\/5), i, axes.length);\n return p[0].toFixed(1)+','+p[1].toFixed(1);\n }).join(' ');\n }<\/p>\n<p> function drawRadar(picks){\n const cx=360, cy=270, maxR=185;\n let out = '';\n out += '<rect x=\"0\" y=\"0\" width=\"720\" height=\"540\" rx=\"24\" fill=\"#ffffff\"\/>';\n for(let ring=1; ring<=5; ring++){\n const r = maxR*ring\/5;\n const pts = axes.map((_,i)=>{\n const p=polarPoint(cx,cy,r,i,axes.length);\n return p[0].toFixed(1)+','+p[1].toFixed(1);\n }).join(' ');\n out += '<polygon points=\"'+pts+'\" fill=\"none\" stroke=\"'+(ring===5?'#b9cbd4':'#dce8ee')+'\" stroke-width=\"'+(ring===5?1.4:1)+'\"\/>';\n }\n axes.forEach((axis,i)=>{\n const lineEnd = polarPoint(cx,cy,maxR,i,axes.length);\n const label = polarPoint(cx,cy,maxR+68,i,axes.length);\n const anchor = label[0] < cx-12 ? 'end' : (label[0] > cx+12 ? 'start' : 'middle');\n out += '<line x1=\"'+cx+'\" y1=\"'+cy+'\" x2=\"'+lineEnd[0].toFixed(1)+'\" y2=\"'+lineEnd[1].toFixed(1)+'\" stroke=\"#dce8ee\" stroke-width=\"1\"\/>';\n out += '<text x=\"'+label[0].toFixed(1)+'\" y=\"'+label[1].toFixed(1)+'\" text-anchor=\"'+anchor+'\" dominant-baseline=\"middle\" font-size=\"16\" font-weight=\"900\" fill=\"#34434d\">'+axis.radar+'<\/text>';\n });\n picks.forEach((key,idx)=>{\n const mat = materials[key];\n out += '<polygon points=\"'+polygonFor(key)+'\" fill=\"'+mat.color+'\" fill-opacity=\"'+(idx===0?0.22:0.13)+'\" stroke=\"'+mat.color+'\" stroke-width=\"3.6\"\/>';\n axes.forEach((axis,i)=>{\n const score = mat.values[axis.key] || 0;\n const p = polarPoint(cx, cy, maxR*(score\/5), i, axes.length);\n out += '<circle cx=\"'+p[0].toFixed(1)+'\" cy=\"'+p[1].toFixed(1)+'\" r=\"5\" fill=\"'+mat.color+'\" stroke=\"#fff\" stroke-width=\"1.5\"\/>';\n });\n });\n radar.innerHTML = out;\n }<\/p>\n<p> function buildLegend(picks){\n legend.innerHTML = picks.map(key=>{\n const mat = materials[key];\n return '<span class=\"pok-radar-legend-item\"><i class=\"pok-radar-swatch\" style=\"background:'+mat.color+'\"><\/i>'+mat.name+'<\/span>';\n }).join('');\n }<\/p>\n<p> function scoreHTML(score){\n const pct = Math.max(0, Math.min(100, score\/5*100));\n return '<span class=\"pok-score\"><b>'+score+'\/5<\/b><span class=\"pok-score-bar\"><i style=\"width:'+pct+'%\"><\/i><\/span><\/span>';\n }<\/p>\n<p> function buildTable(picks){\n let html = '<\/p>\n<table class=\"pok-compare-table\">\n<thead>\n<tr>\n<th>Criterion<\/th>\n<p>';\n picks.forEach(key=>{ html += '<\/p>\n<th>'+materials[key].name+'<\/th>\n<p>'; });\n html += '<\/tr>\n<\/thead>\n<tbody>';<\/p>\n<p> axes.forEach(axis=>{\n html += '<\/p>\n<tr>\n<td>'+axis.label+'<\/td>\n<p>';\n picks.forEach(key=>{\n const mat = materials[key];\n html += '<\/p>\n<td>'+scoreHTML(mat.values[axis.key])+'<span class=\"pok-compare-comment\">'+(mat.notes[axis.key]||'')+'<\/span><\/td>\n<p>';\n });\n html += '<\/tr>\n<p>';\n });<\/p>\n<p> html += '<\/p>\n<tr>\n<td>Relative price level<\/td>\n<p>';\n picks.forEach(key=>{\n const mat = materials[key];\n html += '<\/p>\n<td><span class=\"pok-price-pill\">'+mat.price+'<\/span><span class=\"pok-compare-comment\">Indicative only: depends on the grade, filler content, color, batch and project requirements.<\/span><\/td>\n<p>';\n });\n html += '<\/tr>\n<p>';<\/p>\n<p> html += '<\/tbody>\n<\/table>\n<p>';\n tableWrap.innerHTML = html;\n }<\/p>\n<p> function getPicks(){\n const seen = new Set();\n const picks = [];\n selects.forEach(select=>{\n const val = select.value;\n if(val && materials[val] && !seen.has(val)){\n seen.add(val);\n picks.push(val);\n }\n });\n return picks.length ? picks : defaults.filter(Boolean);\n }<\/p>\n<p> function render(){\n const picks = getPicks();\n drawRadar(picks);\n buildLegend(picks);\n buildTable(picks);\n }<\/p>\n<p> fillSelects();\n selects.forEach(select=>select.addEventListener('change', render));\n if(reset){\n reset.addEventListener('click', ()=>{\n selects.forEach((select,index)=>{ select.value = defaults[index] || ''; });\n render();\n });\n }\n render();\n})();\n<\/script><\/p>\n<p><\/body><br \/>\n<\/html><\/p>","protected":false},"excerpt":{"rendered":"<p>Polyketone POK \/ PK \u2014 Exablend\u00ae POK for Friction, Chemical Contact and Precision Parts | Material Wizard A material platform for precision assemblies Polyketone POK \/ PK for friction, chemical contact and stable geometry Polyketone POK \/ PK is a high-performance semi-crystalline thermoplastic for parts whose service life is governed by friction, contact with liquids […]<\/p>\n","protected":false},"author":1,"featured_media":3723,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5085","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\n<title>Polyketone POK \/ PK Supplier \u2014 Exablend\u00ae 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