Kev siv ntau yam yas
No. 1 PET polyethylene terephthalate
Lub raj mis dej ntxhia, carbonated haus fwj, thiab lwm yam. Thaum tshav kub kub resistant rau 70 degree, yooj yim deform, nrog cov khoom tsim kev puas tsuaj rau tib neeg lub cev melting tawm. No. 1 yas yuav tso tawm carcinogen DEHP tom qab 10 lub hlis ntawm kev siv. Tsis txhob muab tso rau hauv lub tsheb kom bask nyob rau hauv lub hnub; Tsis txhob muaj cawv, roj thiab lwm yam khoom.
No. 2 HDPE high density polyethylene
Hom tshuaj dawb lub raj mis, cov khoom siv tu thiab cov khoom siv da dej. Tsis txhob siv nws ua lub khob dej lossis ua lub thawv rau lwm yam khoom. Tsis txhob rov ua dua yog tias kev ntxuav tsis tiav.
Nr 3 PVC
Cov tsho raincoats, cov ntaub ntawv hauv tsev, cov yeeb yaj kiab yas, cov thawv yas, thiab lwm yam nrog cov yas zoo thiab cov nqi qis, nws yog dav siv thiab tsuas tuaj yeem tiv taus 81 degree. Nws yog ib qho yooj yim los tsim cov khoom tsis zoo ntawm qhov kub thiab txias thiab tsis tshua siv rau ntim khoom noj. Nws yog qhov nyuaj rau kev ntxuav thiab yooj yim kom nyob twj ywm. Tsis txhob rov siv dua. Tsis txhob yuav dej haus.
No. 4 PE polyethylene
Feem ntau cov yeeb yaj kiab khaws cia tshiab, cov yeeb yaj kiab yas, thiab lwm yam. Cov tshuaj phem raug tsim thaum kub kub. Thaum cov tshuaj lom neeg nkag mus rau hauv tib neeg lub cev nrog zaub mov, lawv tuaj yeem ua rau mob qog noj ntshav ntawm lub mis, congenital defects ntawm cov menyuam mos thiab lwm yam kab mob. Tsis txhob muab cov yas qhwv rau hauv lub qhov cub microwave.
Nr 5 pp
Hom kua mis nyuj fwj, yogurt fwj, kua txiv haus fwj, microwave qhov cub noj su lub thawv. Lub melting point yog mus txog 167 degree, uas yog ib tug ntawm cov yas thawv uas yuav muab tso rau hauv lub microwave qhov cub thiab yuav rov qab siv tau tom qab ntxuav tu. Nws yuav tsum raug sau tseg tias rau qee qhov microwave qhov cub noj su lub thawv, lub thawv lub cev yog ua los ntawm No. 5 PP, tab sis lub thawv npog yog ua los ntawm No. 1 PE. Txij li PE 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 lub cev.
No. 6 PS polystyrene
Feem ntau cov tais ntawm instant noodles thiab khoom noj txom ncauj. Tsis txhob muab tso rau hauv lub qhov cub microwave kom tsis txhob tso cov tshuaj vim qhov kub thiab txias. Tom qab muaj cov kua qaub (xws li kua txiv kab ntxwv) thiab alkaline tshuaj, carcinogens yuav decomposed. Tsis txhob ntim cov zaub mov kub hauv lub thawv khoom noj txom ncauj. Tsis txhob siv lub microwave los ua noj cov noodles.
No.7 Lwm yam
Tej fwj dej, qhov chaw khob thiab lub raj mis mis. Cov khw muag khoom feem ntau siv cov khob dej no ua khoom plig. Nws yog ib qho yooj yim los tso cov tshuaj lom bisphenol A, uas yog teeb meem rau tib neeg lub cev. Tsis txhob tshav kub los yog ncaj qha mus rau lub hnub thaum siv.