Polyolefins

Polyolefins (polypropylene PP, polyethylene PE) — the largest class of thermoplastics by volume. Material Wizard supplies virgin and recycled polyolefin compounds for packaging, technical products and series production. PP vs PE — key differences Polypropylene (PP) — density 0.90-0.91 g/cm³, melting temperature 160-170 °C, stiffer than PE, better flex resistance, suitable for parts with hinges (living hinges). Withstands 100-110 °C in continuous service. Polyethylene (PE) — density 0.915-0.965 g/cm³, melting temperature 110-135 °C, softer and more impact-resistant. Continuous service up to 60-80 °C. Better low-temperature resistance. Homopolymer / Block copolymer / Random PP homopolymer — maximum stiffness and melting temperature. Suitable for rigid housings, thin-walled parts, packaging. PP block copolymer — additionally contains ethylene blocks that improve impact resistance at low temperatures. The standard for industrial containers and automotive parts. PP random copolymer — statistically distributed ethylene units. High transparency, flexibility, better organoleptic properties. The standard for transparent packaging, medical products and food containers. Polyethylene density and MI HDPE (High Density) — 0.941-0.965 g/cm³. Rigid, chemically resistant; for pipes, canisters, technical products. LDPE (Low Density) — 0.915-0.935 g/cm³. Soft, flexible; for films, bags, insulation. LLDPE (Linear Low Density) — linear LDPE with better mechanical properties. The standard for stretch film and packaging. Melt Flow Index (MFI) characterizes melt flowability: low MFI (0.5-2) — for extrusion and blow molding; medium (5-15) — for injection molding of large parts; high (20-40) — for molding small parts and for stretch films. Recycled PP/PE — cost-effective solutions Material Wizard offers certified recycled polyolefins with controlled particle size distribution, impurity removal and stabilization. This means a price 30-50 % below virgin material while retaining 80-95 % of the properties, depending on the application. Applications of recycled PP/PE: Technical products where food-contact certification is not required — canisters, crates, pallets. Construction materials — pipes (non-potable water), roofing elements, sewerage. Agricultural packaging, storage containers. Geomembranes, drainage systems. Furniture fittings, technical components. Composite solutions for PP/PE PP GF30 — polypropylene with 30 % glass fiber. Flexural modulus 5-7 GPa, HDT 140-150 °C. An alternative to PA GF30 in relatively dry applications. PP-T (talc) — mineral-filled PP for stiffness and dimensional stability. PE-X (cross-linked) — for hot-water supply lines and heating systems. Compatibilizers for PP/PE blends When PP and PE or their recyclates are blended, mechanical compatibility decreases. Compatibilizers based on MAH-functionalized PP/PE restore adhesion between the phases and bring properties back to 80-95 % of the virgin-material level. How to choose a polyolefin for your product Material Wizard will help you select the optimal PP/PE compound: copolymer type, MFI, filler content, additions of UV stabilizers, antistatic agents and flame retardants. For series production we offer recycled grades with guaranteed batch-to-batch consistency. Ask for a free consultation.