Cov kaus poom yas airtight hauv khw yog ua los ntawm PET, polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) thiab acrylonitrile-butadiene-styrene Copolymer (ABS). Yam khoom twg zoo yog nyob ntawm lub hom phiaj thiab cov khoom yuav tsum tau ntim.
1. Cov ntaub ntawv tseem ceeb ntawm cov tsiaj yas: Cov khoom siv feem ntau yog siv los ua lub raj mis haus, tshuaj tiv thaiv thiab lwm yam pob tshab tiv thaiv zaj duab xis.
2. Polyethylene yas yog qhov muag muag thiab muaj qhov zoo nkauj zoo nkauj rau qhov kov. Piv nrog rau tib cov yas, nws yog sib dua nyob rau hauv zoo thiab muaj tej yam pob tshab. Thaum nws kub hnyiab, nplaim taws yog xiav. Cov ntawv thov tseem ceeb yog: hnab yas, hnab tshos-style hnab yas, hnab ntim khoom noj, menyuam lub raj mis, pails, kettles, thiab lwm yam.
3. Polypropylene yog ib qho thermoplastic cob tau los ntawm polymerizing propylene. Feem ntau yog siv rau hauv kev txhaj tshuaj ntawm cov khoom siv hauv tsev, cov khoom siv hloov pauv, cov khoom siv tshuaj niaj hnub, cov kav dej, thiab lwm yam.
4. Polystyrene yas yog siv dav hauv cov cuab yeej kho qhov muag, tshuaj lom neeg kev lag luam thiab cov khoom siv niaj hnub, thiab yog siv los ua tshuaj yej tais, qab zib tais, xab npum, thawv luam yeeb, tub ntxhais kawm rulers, combs, thiab lwm yam. Vim nws cov huab cua permeability, thaum ua. rau hauv cov khoom ua yeeb yaj kiab, nws kuj tuaj yeem siv los ua cov khoom ntim khoom noj zoo.
Yog tias lub thawv yas airtight feem ntau yog siv los tuav cov zaub mov, nws yog qhov zoo los xaiv cov khoom siv tsiaj.
