Tsis yog . 1 PET (Polyethylene Terephthalate)
Feem ntau pom muaj nyob rau hauv lub raj mis dej ntxhia, carbonated haus fwj, thiab lwm yam. Nws deforms yooj yim thaum raug tshav kub tshaj 70℃thiab tej zaum yuav leach tshuaj phem rau tib neeg lub cev. Tom qab 10 lub hlis ntawm kev siv, Tsis muaj . 1 cov khoom yas yuav tso tawm cov carcinogen DEHP. Tsis txhob cia lawv nyob hauv lub tsheb uas raug tshav ntuj; tsis txhob siv lawv khaws cawv, roj, lossis cov khoom zoo sib xws.
Tsis muaj . 2 HDPE (High-Ntev Polyethylene)
Feem ntau pom muaj nyob rau hauv cov fwj tshuaj dawb, ntxuav cov ntim khoom, thiab cov khoom siv da dej. Tsis txhob rov siv cov no ua khob haus dej lossis cov thawv ntim khoom rau lwm yam khoom. Tsis txhob rov siv dua yog tias lawv tsis tuaj yeem ntxuav kom huv.
Tsis yog . 3 PVC (Polyvinyl Chloride)
Feem ntau pom muaj nyob rau hauv raincoats, cov ntaub ntawv siv, yas films, yas thawv, thiab lwm yam Vim nws zoo heev plasticity thiab tsis tshua muaj nqi, nws yog dav siv, tab sis nws tsuas withstands kub txog 81 degree. Cov khoom tsis zoo tuaj yeem tso tawm ntawm qhov kub thiab txias, yog li nws tsis tshua siv rau ntim khoom noj. Nws yog qhov nyuaj rau kev ntxuav thiab ua rau cov khoom seem; tsis txhob rov siv dua. Tsis txhob yuav yog tias siv los ntim cov dej haus.
Tsis yog . 4 PE (Polyethylene)
Feem ntau pom muaj nyob rau hauv cling zaj duab xis, yas qhwv, thiab lwm yam. Cov khoom tsis zoo yog tsim los ntawm qhov kub thiab txias; yog tias cov co toxins nkag mus rau hauv lub cev los ntawm cov zaub mov, lawv tuaj yeem ua rau muaj mob xws li mob qog noj ntshav mis lossis kev tsis haum xeeb hauv cov menyuam mos. Tsis txhob siv cling zaj duab xis hauv microwave.
Tsis yog . 5 PP (Polypropylene)
Feem ntau pom muaj nyob rau hauv cov kua mis nyuj fwj, yogurt fwj, kua txiv hmab txiv ntoo fwj, thiab microwave-cov thawv ntim khoom noj. Nrog lub melting point siab li 167 degree, nws yog tib hom yas ntim khoom haum rau kev siv microwave thiab rov siv tau tom qab ntxuav tu. Nco ntsoov tias qee lub microwave- cov thawv ntim khoom nyab xeeb muaj lub cev ua los ntawm No. 5 PP tab sis lub hau ua los ntawm No. 1 PE; vim PE tsis tuaj yeem tiv taus qhov kub thiab txias, lub hau yuav tsum tsis txhob muab tso rau hauv lub microwave nrog rau lub thawv lub cev.
