Kev siv cov thawv yas rov qab yog qhov zoo rau ib puag ncig thiab noj qab nyob zoo

Raws li kev siv cov khoom siv sib txawv, lub thawv yas dav dav muaj cov cim kev ua haujlwm kom paub qhov txawv.

1-PET polyethylene terephthalate: Carcinogens tsim tom qab kaum lub hlis ntawm kev siv. Cov yas ntawm cov khoom siv no muaj qhov ua tau zoo ntawm kev muab pov tseg tom qab siv, thiab feem ntau yog siv los ua cov dej ntxhia dej, lub raj mis mis, thiab lwm yam. Nws tsis haum rau cov dej supercooled thiab superheated, uas yooj yim rau precipitate carcinogen DEHP.

2-HDPE (High Density Polyethylene): Tsis yooj yim los ntxuav, yooj yim rau cov kab mob, nws tsis pom zoo kom rov siv dua. Feem ntau cov fwj tshuaj pleev ib ce, da dej gel yas qhwv fwj yog cov khoom siv no.

3-PVC (polyvinyl chloride): Nws yog ib qho yooj yim los cais cov khoom tsis zoo nyob rau hauv qhov kub thiab txias, thiab feem ntau siv rau hauv cov tsho tiv nag, cov khoom ua si yas, cov khoom siv hauv tsev, thiab lwm yam.

4-LDPE (Low Density Polyethylene): Nws yog ib qho yooj yim los tsim cov khoom tsis zoo ntawm qhov kub thiab txias. Cov hnab yas thiab cov hnab yas feem ntau siv hauv lub neej txhua hnub yog tag nrho cov khoom siv no. Kev ntim cov khoom noj hauv hnab yas thiab cua sov tuaj yeem yooj yim yaj cov khoom tsis zoo nyob rau hauv muaj roj.

5-PP (Polypropylene): Cov khoom siv tsuas yog siv rau microwave cua sov, cov khoom siv zoo heev. Nws tuaj yeem rov siv tau tom qab ua tib zoo tu, tab sis feem ntau lub hau ntawm lub thawv yas microwave tsis yog ua los ntawm PP, yog li nws raug nquahu kom tshem lub hau thaum cua sov.

6-PS (polystyrene): heat-resistant and cold-resistant, it is the material for making bowl instant noodle boxes and foam fast food boxes. You can't put it in the microwave, because the temperature is too high to produce chemicals, so we need to reduce the use of fast food boxes to pack hot food.

7-AB (acrylonitrile butadiene): can not be used for food packaging, but before 2008, code 7 mainly refers to all plastics except 16, the plastic label of plastic milk bottles and water dispensers is usually '7'.

Peb yuav tsum sim kom tsis txhob muaj qhov kub thiab txias, rov siv dua thiab lwm yam kev sib txuas thaum siv cov thawv ntim yas, thiab cia siab tias yuav muaj ntau lub thawv ntim khoom zoo thiab noj qab nyob zoo rau yav tom ntej.