{"id":21,"count":14,"description":"

Polyphthalamides (PPA)<\/strong> are a class of semi-aromatic polyamides that combines the heat resistance typical of high-performance polymers with the processability of conventional polyamides. For the design engineer this means service temperatures of 180\u2013230 \u00b0C<\/strong>, minimal water absorption of 0,15\u20130,5 %<\/strong>, and retained stiffness where PA66 can no longer cope.<\/p>\r\n\r\n

How PPA differs from PA66<\/h3>\r\n

The structure of PA66 contains only aliphatic (-CH\u2082-) chains. In PPA an aromatic terephthalic ring<\/strong> (TPA, IPA) is added to them, which raises the melting temperature from 260 \u00b0C (PA66) to 290\u2013310 \u00b0C (PPA), and the continuous service temperature from 100\u2013120 \u00b0C to 170\u2013200 \u00b0C. At the same time water absorption drops 5\u201310 times, while dimensional stability in a humid environment is comparable to that of mineral-filled PBT.<\/p>\r\n\r\n

When to choose PPA<\/h3>\r\n
    \r\n
  • Automotive under-the-hood space<\/strong> \u2014 thermostat housings, pistons, cooling-system fittings, turbocharger brackets.<\/li>\r\n
  • SMT electronics<\/strong> \u2014 connectors and housings that withstand reflow soldering at 240\u2013260 \u00b0C without deformation.<\/li>\r\n
  • LED housings<\/strong> \u2014 colour and dimensional stability under prolonged heating at 110\u2013130 \u00b0C.<\/li>\r\n
  • Metal replacement<\/strong> \u2014 brackets, pump housings, frames where geometric stability is required under thermal cycling and vibration.<\/li>\r\n
  • Hot aggressive media<\/strong> \u2014 pump components, fittings, seals in contact with chemicals at 150 \u00b0C+.<\/li>\r\n<\/ul>\r\n\r\n

    PPA series from Material Wizard<\/h3>\r\n
      \r\n
    • Examid\u00ae HTN (high temperature nylon)<\/strong> \u2014 based on PA6T\/6I and PA66\/6T copolymers, reinforced with glass fibre and minerals. Service temperatures 180\u2013220 \u00b0C. Grades GF30, GF35, GF50.<\/li>\r\n
    • Examid\u00ae PPA GF series<\/strong> \u2014 a broad range of glass-filled PPA: GF30 5VA, GF33 HSL, GF33 V0 IR, GF40 HSL, GF45 V0, GF50 HSL \u2014 from structural to flame-retardant halogen-free grades.<\/li>\r\n
    • AKROMID\u00ae T series<\/strong> \u2014 premium-class polyphthalamides. AKROMID T5 GF50: HDT up to 280 \u00b0C, tensile strength 240 MPa, flexural modulus 15 000 MPa.<\/li>\r\n
    • GRIVORY\u00ae HT (EMS-Grivory)<\/strong> \u2014 the HT1V-4 FWA series, certified for contact with food and drinking water.<\/li>\r\n
    • ForTii\u00ae Ace MX53 (DSM\/Envalior)<\/strong> \u2014 premium PPA GF50 for components in extreme temperature and load conditions.<\/li>\r\n
    • Examid\u00ae PPA CF33<\/strong> \u2014 a polyphthalamide with 33 % carbon fibre. It combines the heat resistance of PPA with the exceptional stiffness of CF filling.<\/li>\r\n<\/ul>\r\n\r\n

      PPA limitations<\/h3>\r\n

      Processing PPA requires higher barrel temperatures (290\u2013330 \u00b0C) and mould temperatures (130\u2013160 \u00b0C). Not all injection moulding machines are suitable \u2014 the nozzle must be heated to 320\u2013340 \u00b0C. Drying is mandatory: 4\u20138 hours at 80\u2013100 \u00b0C. The price is 2\u20134 times higher than PA66, but 5\u201315 times lower than PPS, PEEK, PEI \u2014 which makes PPA an intermediate solution between engineering and high-performance polymers.<\/p>\r\n\r\n

      How to choose PPA for your product<\/h3>\r\n

      Material Wizard will help you select a PPA for your specific service conditions: operating temperature, load, aggressive environment, dimensional-stability requirements. Request a free consultation \u2014 we will discuss your project and propose TDS for the relevant grades.<\/p>","link":"https:\/\/materialwizard.com.ua\/en\/category\/polyamides\/ppa\/","name":"Polyphthalamides (PPA)","slug":"ppa","taxonomy":"category","parent":6,"meta":[],"yoast_head":"\nPPA \/ HTN \u2014 Metal & PA66 Replacement Above +180 \u00b0C | MW<\/title>\n<meta name=\"description\" content=\"PPA \u2014 semi-aromatic polyamide for parts at +180 \u00b0C. Examid\u00ae GF33\/GF40 HSL\/GF50 HLS, AKROMID T5, Grivory HTN. 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