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Polypropylene Resin


Polypropylene is a synthetic resin made by polymerization of propylene (CH3-CH=CH2) with H2 as the molecular weight modifier. There are three stereomers of PP-isotactic, atactic and syndiotactic.

PP contains no polar groups and has excellent electrical insulation properties. Its water absorption rate is less than 0.01%, PP is a semi-crystalline polymer with good chemical stability. It is stable to most chemical except strong oxidizers. Inorganic acid, alkali and salt solutions have almost no damaging effect on PP.

PP has good heat resistance and low density. Its melting point is at around 165℃. It has high tensile strength, surface hardnessand good environmental stress crack resistance. It can withstand 120℃ continuously.

Both Clustering

Tensile strength at yieldMpa≥30292930292829
Flexural modxilusMpa≥1000120010001200120012001000
Charpy impact strength(23℃)KJ/m2≥23121.71
Isotactic index%95.0~99.095.0~99.0-95.0~99.095.0~99.095.0~99.095.0~99.0
ApplicationsExtruded filaments, Carpet backing cloth, Color band cloth, Polypropylene(PP) knitted bagUltra-fine staple fibers, Non-woven febricsInjection MoldingInjection MoldingCPPUltra-fine Staple Fibers, BCF Filament

Random Copolymerization

Tensile strength at yieldMPa≥20262419
Stretching broken column nominal strain%≥300---
Flexural modulusMPa≥620900800600
Charpy impact strength(23℃)KJ/m2≥3.53.532
Heat deflection temperature(0.45MPa)℃≥60--
ApplicationsCold water pipesTransparent materialTransparent materialBinary Heat Seal Layer

Block Copolymers

Tensile strength at yieldMPa≥22172021
Flexural modulusMPa≥10009008501000
Charpy impact strength(23℃)KJ/㎡≥98
Charpy impact strength(-20℃)KJ/㎡≥56
ApplicationsToys, Shells of storage batteries, Household appliances, Automotive partsHousehold Applianc­es,PackagesHigh-impact, Devices, Automotive Partsmachine barrel and partsHigh-impact devices, Automotive and Household appliances parts, Washing machine barrel and parts

Polypropylene Application