Lub hnab ntim khoom muaj ntau yam kev siv thiab lub koob npe nrov hauv kev lag luam kev thauj mus los, yog li nws tseem ceeb heev rau xaiv cov ntaub ntawv thaum ua.
Tam sim no lub hnab ntim khoom yog ua los ntawm ob yam khoom: PP PE. Polyethylene (PE), hu ua PE, yog cov thermoplastic cob tau los ntawm polymerization ntawm ethylene. Hauv kev lag luam, nws kuj suav nrog copolymer ntawm ethylene thiab me me ntawm alpha-olefins. Polyethylene tsis muaj ntxhiab tsw, tsis yog - tshuaj lom, zoo li siv quav ciab, muaj qhov tsis zoo ntawm qhov kub thiab txias (qhov kev ua haujlwm kub tuaj yeem ncav cuag -70 -100 degree), tshuaj lom neeg ruaj khov, thiab tuaj yeem tiv taus qhov yaig ntawm feem ntau cov kua qaub thiab alkalis (tsis yog resistant rau oxidative zog). Acid), insoluble nyob rau hauv ntau cov kuab tshuaj nyob rau hauv chav tsev kub, tsis tshua muaj dej nqus, thiab zoo heev hluav taws xob rwb thaiv tsev kev ua tau zoo; 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.
Los ntawm cov khoom siv, peb tuaj yeem txheeb xyuas tias qhov kev ua tau zoo ntawm lub thawv ntim khoom zoo heev, tab sis yog tias peb xav tau qhov zoo ntawm lub thawv ntim khoom, peb kuj xav tau lawv cov txheej txheem ntau lawm.
