Qhov txawv ntawm polypropylene thiab polyethylene yas zaj duab xis
Zoo li polyethylene, polypropylene kuj yog ib qho polyolefin polymer. Polypropylene thiab polyethylene muaj ntau yam zoo sib xws, xws li tsis muaj tshuaj lom, tsis muaj ntxhiab tsw, tsis qab, txhim khu kev qha huv si; acid, alkali, ntsev thiab ntau yam tshuaj, kev ua haujlwm ruaj khov;
Ntsuas lub cev thiab cov khoom siv kho tshuab; zoo noo noo tsis kam, noo noo tsis kam, qee yam oxygen kuj thiab roj kuj; zoo heev formability thiab zoo tshav kub sealability. Zoo li polyethylene, polypropylene muaj qhov zoo ntawm qhov muaj peev xwm ntau lawm, qhov chaw dav thiab tus nqi qis.
Piv nrog polyethylene, qhov sib txawv tseem ceeb ntawm polypropylene thiab polyethylene yog raws li nram no:
Lub tshav kub tsis kam ntawm polypropylene yog deb tshaj ntawm polyethylene, thiab nws tuaj yeem tiv taus qhov kub siab tshaj 120 degrees. Cov yeeb yaj kiab polypropylene siv los ntim cov zaub mov tuaj yeem tiv taus qhov kub thiab txias siab tshaj 140 degree.
Polypropylene yog superior rau polyethylene nyob rau hauv cov nqe lus ntawm clarity thiab lub zog. Txawm hais tias cov roj tsis kam ntawm polypropylene tsis zoo tagnrho, nws zoo dua li polyethylene.
Piv nrog polyethylene plastics, qhov tsis zoo ntawm polypropylene yog qhov tsis zoo rau kev ua haujlwm txias, thiab polypropylene homopolymer yuav pom tseeb brittleness ntawm xoom.
