Shanghai Daoqin Plastics Co., Ltd.

PP can according to different classification, in classification inner still can different melt rate specifications, can 依 别商 product use additives 情况 定 applications specification. 例如, mono polymer in, MFR: 12 left right can used for generally injection shot formed product, can production Multifilament fiber, more can manufacturing wide molecular weight distribution improvement fiber rear processing property; meanwhile can add slip agent and resistant versus agent, increase property, meet/satisfy plastics bag formed product requirements. more specifications large material property more, in non applications outer has substitute/replace property. this 里尝试以基材之 different classification:

1. generally grade （HOMOPOLYMER） mono polymer, or is homopolymer, is pure propylene polymerization formed raw materials.

2. resistant impact grade （IMPACT COPOLYMER） mono polymer add ethylene propylene 橡胶, impact strong/high degree high low main/primary 看橡胶 content high low, resistant degree good bad main/primary ethylene content high low. raw materials made different, most high ethylene content different.

automotive 保险杆

3. high crystallization grade （HIGH ISOTACTICITY or HIGH CRYSTALLINITY） decrease/reduce PP polymer in structure content, versus for improve/increase property structure content, improve/increase crystallization degree. main/primary improvement raw materials rigid property, hot property temperature degree, surface hardness, resistant property and gloss property. again add increase agent has upper material property increase 进.

4. transparent grade （RANDOM COPOLYMER）随 machine polymer, is propylene add ethylene copolymer combined, ethylene 不规则 dispersion in polymer in, main/primary decrease/reduce polymer crystallization degree improvement transparent property.

transparent PP材质 food box/case

5. hot grade （TERPOLYMER） is machine polymer 延伸, generally propylene ethylene （ non EPR） content most high in 3.5%, has made can add 至5%, ethylene content high product soft/flexible, hot type temperature degree, soft 化点, hot temperature degree low, has is need increase ethylene content need butadiene or its it formed formed is polymer, upper material property requirements.

6. alloy grade （ALLOY） different plastics raw materials high ratio/proportion mixed combined can alloy grade, 例如PP添 add LDPE can improvement soft/flexible property and impact strong/high degree, in processing upper can decrease/reduce shrink and increase property, in molding can decrease low material phenomenon. PP add EPR add HDPE can rigid property, decrease/reduce high EPR content formed whitening phenomenon, improvement impact strong/high degree.

7. composite/compounding material （COMPOUNDING） different material mixed combined composite/compounding material, 譬如添 add glass fiber, type machine material powder, has machine material powder, or material micro sheet/slice, in PP材 material inner improvement various material property. powder also 包括: slip powder, carbon acid 钙, acid 钡, 云母, carbon 黑, carbon fiber and bromine material and other.

long glass fiber reinforced PP pellets, used for automotive inner outer 饰, machine electrical, home appliances and other

8. 橡胶（RUBBER） 橡胶, TPR（ hot can property 橡胶） and TPE（ hot can property elastomer ）, has very difficult separation, various 界定说 method has, large 部份 橡胶都 can and PP versus mixed combined, remove EPR series outer, very difficult mixed combined is in alloy or composite/compounding material inner. generally and PP mixed combined has EPR and EPDM, combined and PP直接 mixed material has CATALLOY, PLASTOMER, ENGAGE, TAFMER, KRATON and SANTOPLENE and other.

9. specifications （SPECIALS）未含 cover/cap in front type can 归入此 type, 例如: high melt strong/high degree raw materials （HMS, High Melt Strength） can use in foaming inner improvement surface gas property improve/increase foaming 效果, can decrease/reduce sheet/plate molding material phenomenon.