bpa pub dawb lub thawv ntim khoom noj: Tam sim no, feem ntau ntawm cov thawv ntim khoom noj khoom haus uas muag hauv khw yog cov khoom siv polyethylene thiab polypropylene, ob yam khoom no tuaj yeem tiv taus qhov kub siab tshaj 100 ° C, thiab muaj kev nyab xeeb rau kev siv, cov neeg siv khoom yuav tsum tau them sai sai rau seb cov khoom noj khoom haus zoo li cas. cov khoom yog cim PE (polyethylene) thiab PP (polypropylene) lo lus, feem ntau "5" sawv cev rau "polypropylene", uas yog, "PP" khoom. Qhov ntsuas kub ntawm cov khoom PP no yog -20 degrees - 120 degrees, uas tuaj yeem siv rau microwave cua sov. Yav dhau los, nws tau hais tias ntawm tag nrho cov hnab yas noj su, tsuas yog lub thawv noj su uas sau tias "5" (PP khoom) tuaj yeem siv rau microwave cua sov thiab muaj kev nyab xeeb heev. Tab sis cov khoom siv PP kuj muaj ntau qib sib txawv, cov khoom siv ntshiab PP yas noj su lub thawv muaj kev nyab xeeb heev. Yuav ua li cas txheeb xyuas seb cov khoom PP puas huv? Ntxiv nrog rau kev saib cov khoom lag luam thiab cov ntaub ntawv soj ntsuam ntsig txog, nws tseem tuaj yeem txheeb xyuas los ntawm cov txheej txheem hauv qab no: 1, ntxhiab tsw: yog tias muaj ntxhiab tsw ntxhiab tsw ntxhiab lossis saj tom qab dej, qhov pib muaj teeb meem. 2, saib: Sib piv cov khoom noj su zoo sib xws ua ke, qhov pob tshab ntau dua nws yuav ntshiab dua. 3, pinch: koj tuaj yeem pinch qhov toughness ntawm cov khoom, nkig heev nyias yuav raug tshem tawm; Tshawb xyuas seb cov khoom lag luam daim duab qhia thiab kev txheeb xyuas puas yog qhov tseeb, thiab seb lub thawv yas lub cev thiab lub thawv npog puas muaj cov khoom sib thooj.
