Cov khoom siv PP yog polypropylene, polypropylene yog cov tsis muaj tshuaj lom, tsis muaj ntxhiab, saj tsis muaj mis nyuj dawb siab crystalline polymer nrog qhov ntom ntawm tsuas yog 0.90-0.91g / cm3, uas yog ib qho ntawm ntau yam sib xws ntawm txhua tus. yas. Nws yog qhov tshwj xeeb ruaj khov rau dej, qhov nqus dej hauv dej tsuas yog 0.01 feem pua, thiab qhov hnyav molecular yog li 80, 000 txog 150,000. Zoo formability, tab sis vim loj shrinkage (1 feem pua ~ 2.5 feem pua). Cov khoom tuab-walled yog yooj yim rau dents. Rau qee qhov chaw nrog qhov tseeb qhov siab, nws nyuaj rau ua tau raws li qhov yuav tsum tau ua, thiab lub ntsej muag gloss ntawm cov khoom yog qhov zoo.
Polypropylene, yas, yog ib tug high-density, sab-chain-dawb, heev crystalline linear polymer nrog zoo heev cov khoom. Cov khoom lag luam: cov phiab, cov thoob, rooj tog zaum, cov yeeb yaj kiab, cov hnab ntim khoom, lub raj mis, lub tsheb bumpers, thiab lwm yam.
PP yas, lub npe tshuaj yog polypropylene, lus Askiv lub npe yog Polypropylene (hu ua pp), lub ntiajteb txawj nqus tshwj xeeb yog 0.9-0.91 g / cm3, molding shrinkage tus nqi yog 1. {5}}.5 feem pua , thiab molding kub yog 160-220 degree C. PP yog crystalline polymer, thiab kev ua tau zoo ntawm PP yog zoo dua li ntawm PE. PP cov khoom muaj lub teeb yuag, zoo toughness thiab zoo tshuaj tiv thaiv. Qhov tsis zoo ntawm PP: tsis tshua muaj qhov tseeb, tsis txaus rigidity, huab cua tsis zoo, nws muaj qhov tshwm sim tom qab shrinkage, thiab tom qab demolding, nws yog ib qho yooj yim rau hnub nyoog, ua nkig, thiab yooj yim rau deform. Hauv lub neej niaj hnub, cov thawv ntim khoom tshiab yog ua los ntawm cov ntaub ntawv PP.