1. Tsiaj& PETE（Polyethylene terephthalate siv）:
Cov fwj dej ntxhia dej, cov fwj dej sib xyaw, cov fwj tshuaj pleev ib ce, thiab lwm yam. Kuj hu ua" Baote fwj", nws yog cua sov-tiv taus 70 ℃ thiab yooj yim rau deform, thiab cov tshuaj muaj teeb meem rau tib neeg lub cev yaj tawm.
Thaum tsiaj ntsib cov roj esters lossis cov khoom cawv, nws yooj yim los tsim cov carcinogen DEHP. Kev tiv thaiv tshav kub ntawm lub raj mis yas yog 70 ℃, thiab nws yog qhov yooj yim tso cov carcinogen DEHP tom qab raug tshav ntuj lossis khaws cia rau hauv qhov kub thiab txias ib puag ncig ntev. DEHP yog phthalate ester. Nws yog ib qho tseem ceeb tshaj plaws ntawm cov yas yas. 90% ntawm DEHP yog siv hauv PVC yas.
Tsis muaj yas 1 yuav tso carcinogen DEHP tom qab 10 lub hlis ntawm kev siv. Tsis txhob muab nws tso rau hauv lub hnub hauv lub tsheb; Tsis txhob haus cawv, roj thiab lwm yam tshuaj.
2. HDPE (High density polyethylene):
Cov thawv rau xab npum, tsuaj zawv plaub hau, pleev da dej, siv roj, tshuaj tua kab, thiab lwm yam yog ua los ntawm HDPE. Lub thawv feem ntau tsis pom kev thiab zoo li siv quav ciab.
Tsis txhob siv nws ua khob dej lossis ua lub thawv ntim khoom rau lwm yam khoom.
Cov ntaub ntawv no nws tus kheej tsis yooj yim los ntxuav kom huv, yog li nws tau pom zoo kom tsis txhob rov ua dua.
3. PVC (Polyvinyl chloride):
Nws tsuas yog siv los tsim cov kav dej, lub tsho loj, hnab hauv tsev kawm ntawv, cov khoom siv hauv tsev, zaj duab xis yas, thawv yas thiab lwm yam tais diav. Cov yas zoo heev thiab tus nqi qis, yog li nws tau siv dav.
Nws tsuas tuaj yeem tiv taus cua sov ntawm 81 ℃, thiab nws yooj yim los tsim cov tshuaj phem ntawm qhov kub, uas tsis tshua muaj siv hauv ntim khoom noj. Nyuaj rau kev ntxuav, yooj yim rau seem, tsis txhob rov ua dua.
4. LDPE (Tsawg ntom polyethylene):
Cov hnab yas uas tuaj yeem pom nyob txhua qhov chaw feem ntau yog ua los ntawm LDPE. Cov yeeb yaj kiab PE tshiab khaws cia, zaj duab xis yas, thiab lwm yam. Thaum kub siab, yuav muaj cov tshuaj phem. Tshaj 110 degrees centigrade, yuav kub yaj. Cov tshuaj lom tuaj yeem nkag mus rau hauv lub cev nrog zaub mov, uas tuaj yeem ua rau mob qog noj ntshav, menyuam yug los tsis xws luag thiab lwm yam kab mob. Tswv yim: tsis txhob qhwv zaj duab xis khaws cia tshiab ntawm cov zaub mov mus rau hauv lub qhov cub microwave.
5. PIB （Polypropylene）:
Cov tais diav hauv chav ua noj feem ntau siv los ua cov thoob, cov thoob khib nyiab, pob tawb, pob tawb thiab ntim khoom noj rau microwave ncu.
Lub ntsiab lus yaj yog siab li 167 ℃. Nws yog lub thawv yas nkaus xwb uas tuaj yeem tso rau hauv lub qhov cub microwave thiab tuaj yeem rov siv tau tom qab ua tib zoo ntxuav. Nws yuav tsum tau sau tseg tias rau qee lub thawv microwave qhov cub noj su, lub thawv ntawv yog ua los ntawm No. 5 PP, tab sis lub npov npog yog ua los ntawm No. 1 Tsiaj. Vim tias tsiaj tsis tuaj yeem tiv taus qhov kub siab, nws tsis tuaj yeem muab tso rau hauv lub qhov cub microwave ua ke nrog lub thawv ntawv.
