Qhov txawv
Polyethylene muaj kev ua tau zoo rwb thaiv tsev. Nyob rau ntawm chav tsev kub, polyethylene yog cov tsis haum rau ib qho kev paub daws teeb meem, thiab tiv taus cov kua tshuaj sulfuric acid, dilute nitric acid thiab lwm cov kua qaub ntawm lwm cov ntsiab lus, nrog rau alkali thiab ntsev cov kev daws teeb meem ntau yam. Polyethylene muaj qhov dej ntawm cov dej tsis kam, thiab nws cov kev ua tau zoo tuaj yeem tsis hloov pauv ntawm kev sib chwv nrog dej ntev. Polyethylene muaj dej tsis zoo vapor permeability, thaum oxygen, carbon dioxide thiab ntau cov ntaub ntawv organic muaj vapor zoo permeability.
Kub - huab cua tsis kam: polyethylene yuav muaj hnub nyoog thiab ua nkig hauv qab kev ua haujlwm ntawm tshav kub, lub teeb thiab oxygen. Feem ntau, kev pabcuam qhov kub thiab txias ntawm polyethylene yog li 800C, thiab cov polyethylene uas tsis tshua muaj siab siab yog li 1000C. Polyethylene tuaj yeem tiv taus txias, thiab nws muaj cov yam ntxwv zoo ntawm - 600C, thiab nws muaj qee yam muag muag ntawm - 700C.
Polyethylene terephthalate (tus tsiaj)
Polyethylene terephthalate yog cov xim tsis muaj pob tshab nrog cov luster (tsis muaj qhov tsis zoo), lossis opaque milky dawb khoom siv (crystalline hom). Nws tsis yooj yim rau kev hlawv, tab sis tom qab hlawv, txawm tias nplaim taws mus deb ntawm nws, nws tuaj yeem txuas mus hlawv. Thaum hlawv, nws yuav yaj thiab tawg ua tej daim. Cov nplaim yog xim daj, nrog rau lub ntug xiav thaum ntxov, cov tee me me poob qis, pa taws dub, thiab me ntsis qab zib thiab pungent tsis hnov tsw ntawm roob txoj siv. Cov khoom ntawm PET ntshiab yog qhov tsis zoo, tshwj xeeb tshaj yog kev cuam tshuam lub zog thiab kub tsis kam, tab sis tom qab iav fiber ntau lub zog, txhua yam khoom muaj peev xwm hloov tau zoo heev.
Polyethylene (PE)
Lub cev nqaij daim tawv: polyethylene yog qhov tsis zoo, tasteless thiab milky dawb. Qhov ntom ntawm 0.91-0.96g / cm3 yog crystalline yas. Polyethylene muaj qee yam ntawm cov neeg kho tshuab, tab sis piv nrog lwm cov plastics, nws lub zog ntawm lub zog tsis tshua muaj tsawg thiab nws cov npoo tawv tsis zoo.
