Lub raj mis yas feem ntau yog tsim los ntawm cov ntaub ntawv xws li polyethylene terephthalate (PET), siab -density polyethylene (HDPE), thiab polypropylene (PP). Txhawm rau pab txhawb kev rov ua dua tshiab thiab kev txheeb xyuas, kev txheeb xyuas thoob ntiaj teb feem ntau yog siv, uas muaj ib daim duab peb sab uas muaj tus lej (xws li 1 txog 7) txhawm rau txheeb xyuas hom yas.
"Tsis yog. 1" txhais tau tias PET (polyethylene terephthalate), uas feem ntau yog siv rau cov dej haus hauv lub raj mis xws li dej ntxhia thiab dej haus carbonated. PET tsis muaj ntxhiab tsw, lub teeb yuag, tshuaj lom neeg ruaj khov, thiab muaj cov khoom sib khi zoo. Nws tiv taus qhov kub li ntawm -20℃txog 65 degree; thaum tsim nyog rau cov dej sov los yog txias, nws yog qhov ua rau deformation thiab leaching ntawm cov khoom uas tsim kev puas tsuaj rau tib neeg kev noj qab haus huv thaum raug rau siab -kub kua los yog cua sov. Thaum siv, PET lub raj mis tuaj yeem tso tawm antimony-ib qho teeb meem hlau catalyst- thiab rov siv dua tuaj yeem ua rau leaching ntawm plasticizers xws li phthalates. Rov qab siv cov dej haus npliag lossis cov dej ntxhia los khaws cov khoom noj xws li vinegar lossis cawv tuaj yeem ua rau muaj kev hloov pauv ntawm cov tshuaj lom. Kev tshawb fawb qhia tias cov dej hauv lub raj mis muaj qhov nruab nrab ntawm kwv yees li 6 lab cov khoom yas ib liter-feem ntau yog nanoplastics-kiv los ntawm lub raj mis nws tus kheej (cov khoom siv PET) thiab lub hau; Cov khoom no tuaj yeem nkag mus rau tib neeg lub cev los ntawm kev noj, ua kom cov lus pom zoo kom txo cov dej hauv lub raj mis kom txo qis kev pheej hmoo ntawm microplastic raug.
"Tsis yog. 2" txhais tau tias HDPE (siab-polyethylene ntom ntom); Cov thawv yas rau cov tshuaj ntxuav thiab cov khoom siv da dej feem ntau yog tsim los ntawm cov khoom siv no. HDPE tuaj yeem tiv taus qhov kub txog li 110℃thiab muaj kev nyab xeeb rau kev cia khoom noj yog tias sau npe ua zaub mov- qib. Cov ntim khoom qub uas siv los ntxuav cov neeg ua haujlwm lossis cov khoom siv da dej tuaj yeem rov qab siv dua tom qab ntxuav tag.
"Tsis yog. 5" txhais tau hais tias PP (polypropylene), tsuas yog cov khoom yas uas haum rau microwave cua sov. PP withstands kub txog li 130℃thiab muaj ib tug melting point siab txog 167 degree; Txawm hais tias nws muaj qhov tsis tshua muaj pob tshab, nws tuaj yeem rov qab siv dua tom qab ua tib zoo tu.
Lwm cov naj npawb (3, 4, 6, thiab 7) kuj yog siv rau cov hom ntim ntim yas ntim. Hauv kev lag luam kev tu tus kheej thiab cov khoom siv hauv tsev, cov khoom siv lub raj mis yas muaj ntau yam; dhau ntawm PET, lawv suav nrog siab - ntom polyethylene (HDPE) thiab ntshiab polypropylene (CPP). Cov ncauj lus tseem ceeb suav nrog kev siv hauv -cov cuab yeej siv tshuab pwm los txhawb kev ntim khoom zoo, nrog rau kev txhim kho eco-cov ntaub ntawv ntim khoom zoo xws li cov thawv yas biodegradable, ntim yas nanocomposite, thiab cov tshuaj tiv thaiv kab mob.
