Polypropylene yog dab tsi
Jan 10, 2024| Polypropylene, hu ua PP, yog ib qho polymer ua los ntawm propylene los ntawm cov tshuaj tiv thaiv polymerization ntxiv. Nws yog cov khoom siv waxy dawb nrog lub pob tshab thiab lub teeb pom kev. Cov tshuaj formula yog (C3H6)n, qhov ceev yog 0.89 ~ 0.91g / cm3, Nws yog flammable, lub melting point yog 164 ~ 170 degree, nws softens ntawm txog 155 degree, thiab siv qhov kub thiab txias yog -30 ~ 140 degree . Nws tuaj yeem tiv thaiv corrosion ntawm acids, alkalis, kua ntsev thiab ntau yam organic solvents hauv qab 80 degree, thiab tuaj yeem decompose nyob rau hauv kub thiab oxidation. Polypropylene yog ib qho thermoplastic hluavtaws cob nrog cov khoom zoo heev. Nws yog xim tsis muaj xim, translucent thermoplastic lub teeb yuag dav dav-lub hom phiaj yas nrog tshuaj lom neeg tsis kam, kub tsis kam, hluav taws xob rwb thaiv tsev, lub zog muaj zog txhua yam thiab zoo hnav ua haujlwm ua haujlwm zoo. [5], dav siv hauv kev tsim khaub ncaws, pam vov thiab lwm yam khoom siv fiber ntau, khoom siv kho mob, tsheb, tsheb kauj vab, qhov chaw, cov kav dej thauj mus los, cov thawv ntim tshuaj, thiab lwm yam, thiab tseem siv rau hauv cov khoom noj thiab tshuaj ntim khoom.
Thaum Lub Kaum Hli 27, 2017, Lub Koom Haum Ntiaj Teb Kev Noj Qab Haus Huv Lub Koom Haum Ntiaj Teb Kev Tshawb Fawb Txog Kev Tshawb Fawb tau tshaj tawm cov npe ua ntej siv cov carcinogens. Polypropylene muaj nyob rau hauv cov npe ntawm Class 3 carcinogens.