Cov ntaub ntawv sib txawv, PE: polyethylene, PP: polypropylene
PP yog polypropylene stretchable yas, uas yog ib hom thermoplastic.Lub hnab PP yog cov hnab yas tiag tiag.Cov yam ntxwv ntawm lub hnab PP tsis muaj tshuaj lom thiab tsis qab.Qhov saum npoo ntawm lub hnab PP yog du thiab pob tshab, thiab nws yog dav siv nyob rau hauv ntim cov tshuaj pleev ib ce, khoom noj khoom haus, khoom ua si, khaub ncaws, ntawv sau, electronics, khoom kho vajtse thiab lwm yam lag luam.Cov xim ntawm lub hnab PP yog pob tshab, zoo zoo, zoo toughness, muaj zog, thiab tsis tuaj yeem khawb.Tus nqi ua ntawm PP hnab yog pheej yig heev, thiab cov yam ntxwv yog: yooj yim rau hlawv, nplaim taws yog molten thiab dripping, lub sab sauv yog daj thiab qis dua yog xiav, tom qab tawm hauv qhov hluav taws kub, muaj pa taws tsawg dua thiab hlawv txuas ntxiv.
PE yog cov ntawv luv ntawm polyethylene, uas yog ib hom thermoplastic resin ua los ntawm polymerization ntawm ethylene.Polyethylene tsis muaj ntxhiab tsw, tsis muaj tshuaj lom, zoo li siv quav ciab, muaj qhov kub thiab txias tsis kam (qhov kub qis tshaj tuaj yeem ncav cuag -70 ~ 100 ℃), muaj tshuaj lom neeg ruaj khov, thiab tuaj yeem tiv taus cov kua qaub thiab alkalis feem ntau (tsis tiv taus oxidizing zog) Acid), insoluble nyob rau hauv cov kuab tshuaj nyob rau hauv chav tsev kub, tsis tshua muaj dej nqus, zoo heev hluav taws xob rwb thaiv tsev zog;tab sis polyethylene yog rhiab heev rau ib puag ncig kev nyuaj siab (tshuaj lom neeg thiab mechanical teebmeem), thiab tsis zoo thaum tshav kub kub aging kuj.Cov khoom ntawm polyethylene sib txawv ntawm hom mus rau hom, feem ntau nyob ntawm tus qauv molecular thiab ntom.Cov txheej txheem ntau lawm tuaj yeem siv kom tau txais cov khoom sib txawv (0.91 ~ 0.96g / cm3).Tsis tas li ntawd, cov ntaub qhwv yas ntawm cov khoom PE kuj tseem hu ua PE hnab.Nco ntsoov tias cov yas qhwv uas tuaj rau hauv kev sib cuag nrog cov zaub mov ncaj qha yuav tsum yog cov khoom siv PE, uas muaj kev nyab xeeb dua rau tib neeg lub cev.
Post lub sij hawm: Jun-17-2021