Dab tsi yog qhov sib txawv ntawm PE hnab thiab ib lub hnab PP

Cov khoom sib txawv, PE: polyethylene, PP: Polypropylene
PP yog yas tensile polypropylene yas, teej tug mus rau ib hom thermoplastic. Lub hnab PP yog ua tau ib lub hnab yas. Cov yam ntxwv ntawm cov hnab PP yog cov tsis muaj mob thiab tsis qab. Qhov ntsa ntawm PP hnab yog pob tshab thiab pob tshab. Nws yog dav siv cov tshuaj pleev ib ce, khoom noj khoom haus, khoom ua si, khaub ncaws, ntawv sau, hluav taws xob, kho vajtse thiab lwm yam lag luam. PP hnab xim yog pob tshab, zoo zoo, zoo toughness, muaj zog dua, tsis tuaj yeem tawg. PP lub hnab ua pheej yig heev, yam ntxwv yog: yooj yim rau kev hlawv, nplaim taws yog melting poob, lub daj thiab xiav, haus luam yeeb tsawg dua tom qab hluav taws, tseem yuav hlawv.
PE yog lub npe ntawm polyethylene, ib thermoplastic cob tau los ntawm polymerization ntawm ethylene. Polyethylene tsis muaj ntxhiab tsw, tsis muaj tshuaj lom, zoo nkaus li siv quav ciab, tsis muaj dab tsi zoo rau kev ua kom kub tsis ncav (minimum temperature) -70 ~ 100 C, , insoluble nyob rau hauv ntau cov kuab tshuaj nyob rau hauv chav tsev kub, dej tsis qab, zoo hluav taws xob rwb thaiv tsev zog; tab sis polyethylene rau ib puag ncig kev nyuab siab (tshuaj lom neeg thiab txhua yam ua haujlwm) yog qhov kev rhiab heev, kev kub hnyiab tuaj yeem txawv txav. Cov khoom ntawm polyethylene sib txawv nyob ntawm seb cov qauv molecular thiab ceev. Cov khoom ntawm qhov sib txawv ntawm qhov sib txawv (0.91 ~ 0.96g / cm3) tuaj yeem tau los ntawm ntau hom kev tsim. Cov duab tshiab ntawm PE yuav tuaj yeem hu ua PE hnab. Nws yog ib qho tsim nyog yuav tau xaiv cov khoom PE rau kev sib cuag nrog cov zaub mov. Nws yog kev ruaj ntseg rau tib neeg lub cev.
Qhov sib txawv tshwj xeeb yog tsuas yog kev xav ntawm tes
PE yog muag thiab muaj zog, txawm tias nws yog kneaded, nws tsis wrinkle.