Polyethylene yog cov feem ntau ntawm cov yas. Qhov uas tau txais ntawm nws daim ntawv thov yog qhov dav heev uas ib tus neeg tuaj yeem tsuas xav tsis thoob txog cov yam ntxwv ntawm cov khoom no. Ib qho ntawm kev siv ntau tshaj plaws rau polyethylene yog ntim khoom.
Dab tsi yog polyethylene?
Polyethylene yog cov ntaub ntawv siv dav dawb polymer uas yooj yim thermoplastic. Tsis tas li ntawd, nws muaj tus lej ntawm cov khoom muaj zog uas ua rau nws tsis tuaj yeem hauv ntau qhov kev lag luam.
Polyethylene ua pov thawj tiv taus alkalis, organic acids, muaj cov ntsiab lus hydrochloric thiab hydrofluoric acids. Qhov no ua rau nws muaj peev xwm tsim ntau cov raj dej los ntawm nws rau kev ua haujlwm hauv qhov chaw muaj kev txhoj puab heev. Nws yog tus tiv taus hluav taws xob thiab tsis muaj mob nyob rau tib lub sijhawm. Kev ua haujlwm kub ntau ntawm polyethylene cov khoom lag luam yog rho tawm 80 mus txog rau 100 ° C.
Ntiaj teb ntim
Nws yog qhov tseeb tias cov khoom zoo li pheej yig thiab thev naus laus zis tau pom nws txoj kev siv ua cov khoom ntim. Tib qho teeb meem ntawm cov khoom ntim polyethylene yog nws qhov kev tawm tsam rau kev rhuav tshem. Ntawm qhov tod tes, polyethylene tuaj yeem kho tau yooj yim, uas txuag cov khoom nyoos rau nws ntau lawm.
Tau ntev, cov tuam ntxhab tau tso tseg daim ntawv thiab cov duab los qhia, nyiam cov zaj duab xis yas, uas tsis tsuas yog muab cov qib siab ntawm kev nyab xeeb, tab sis kuj ua rau nws yooj yim rau lub tshuab los ntim cov txheej txheem nws tus kheej.
Cov hnab yas zais ntshis
Ntxiv rau zaj duab xis, hnab yas yog dav siv rau ntim. Qhov no yog tib daim ntawv yas, tsuas yog ua nyob rau hauv daim ntawv ntawm cov khoom tiav.
Nws yog nqi tsim nyog nyob sib cais ntawm cov hau kev ntawm kev tsim khoom ntawm ob zaj duab xis nws tus kheej thiab lub hnab los ntawm nws. Polyethylene zaj duab xis yog tsim ntawm lub tshuab ua kom zoo nkauj tshwj xeeb. Cov zis yog ib hom yeeb nkab uas npaj rau kev siv txuas ntxiv. Nyob ntawm seb siv ntau li cas, zaj duab xis tuaj yeem tsim ua xim ob qho tib si thiab xim dawb.
Yog tias tsim nyog, duab yuav siv rau saum npoo ntawm hnab yas siv cov txheej txheem ib txwm luam ntawv. Txawm li cas los xij, lub hnab yas ntawm ntau yam duab thiab cov laj thawj yog tsim ntawm lub tshuab ua haujlwm siab tshwj xeeb.
Nyob ntawm cov khoos kas thiab cov khoom siv sib txuam, lawv tuaj yeem tsim cov hnab ntim zoo nkauj, lub hnab T-shirt, hnab nrog cov tes nrog thiab lwm tus. Hauv kev tsim khoom, cov tshuab zoo li no feem ntau siv raws li ib feem ntawm cov kab tsis siv neeg, uas cov duab tsim nyog yog tam sim ntawd siv rau pob.
