Thaum muas lub thawv tshiab lossis zaj duab xis, koj yuav tsum tau them sai sai rau seb nws puas tau cim nrog lub npe tshwj xeeb lossis cov qauv tshuaj. Yog tias cov khoom tsuas muaj lub npe Askiv tab sis tsis muaj lub logo Suav, koj yuav tsum tau ceev faj. Nyob rau tib lub sijhawm, peb yuav tsum xaiv cov khoom cim nrog "khoom noj".
Cov thawv ntim khoom tshiab yog tsim los ntawm polyethylene (PE) thiab polypropylene (PP). Tus nqi sib txawv ntawm ob yam khoom tsis loj, tab sis polypropylene (PP) tuaj yeem tiv thaiv kev nkag mus ntawm cov roj zoo dua.
Thaum yuav cov yeeb yaj kiab tshiab, nws raug nquahu kom yuav cov nplaum nplaum tshiab uas ua los ntawm polyethylene (PE) ua ntej, tshwj xeeb tshaj yog thaum khaws cov nqaij thiab txiv hmab txiv ntoo tshiab, vim tias los ntawm kev xav ntawm kev nyab xeeb, PE cov yeeb yaj kiab tshiab yog qhov nyab xeeb tshaj plaws. Yog tias koj xav khaws cov tshiab rau lub sijhawm ntev, nws raug nquahu kom xaiv polyvinylidene chloride (PVDC), vim tias cov khoom no muaj cov dej noo zoo dua, thiab lub sijhawm khaws cia yog qhov ntev tshaj plaws ntawm peb cov ntaub ntawv. Polyvinyl chloride (PVC) cov yeeb yaj kiab tshiab tau dhau los ua qhov kev xaiv ntawm ntau tus neeg vim nws cov pob tshab zoo, zoo viscosity, zoo elasticity thiab tus nqi qis. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias nws tsis tuaj yeem siv rau cov khoom noj greasy tshiab, vim tias nws yog cov khoom siv los ntawm polyvinyl chloride resin, plasticizer thiab antioxidant, thiab tsis muaj tshuaj lom. Txawm li cas los xij, ntxiv plasticizers, antioxidants thiab lwm yam khoom siv tseem ceeb yog tshuaj lom. Cov plasticizers hauv cov khoom siv niaj hnub siv PVC feem ntau yog siv dibutyl terephthalate thiab dioctyl phthalate. Cov tshuaj no yog tshuaj lom. Ntxiv mus, cov roj hauv cov zaub mov tuaj yeem yooj yim yaj cov yas "ethylamonia" hauv cov yeeb yaj kiab tshiab, uas muaj kev puas tsuaj loj rau tib neeg endocrine system thiab yuav cuam tshuam cov tshuaj hormone metabolism hauv tib neeg lub cev. Lead stearate, antioxidant ntawm polyvinyl chloride, kuj yog tshuaj lom. Polyvinyl chloride (PVC) cov khoom uas muaj cov hmoov lead ntsev antioxidant yuav precipitate txhuas thaum tiv nrog ethanol, ether thiab lwm yam kuab tshuaj. Thaum polyvinyl chloride uas muaj cov hmoov lead ntsev yog siv los ua cov khoom ntim khoom noj thiab sib ntsib nrog cov khob cij kib, cov ncuav qab zib, cov ntses kib, cov nqaij siav, khoom qab zib thiab khoom noj txom ncauj, cov hmoov lead molecules yuav diffuse rau hauv cov roj. Yog li ntawd, polyvinyl chloride hnab yas tsis tuaj yeem siv los ntim cov khoom noj uas muaj roj. Tsis tas li ntawd, nws tsis raug tso cai siv qhov cub microwave rau cua sov thiab siv kub. Vim hais tias PVC cov khoom yas yuav maj mam decompose hydrogen chloride gas ntawm qhov kub thiab txias, xws li txog 50 degree, uas muaj teeb meem rau tib neeg lub cev, PVC cov khoom tsis haum rau ntim khoom noj.