Cov Hazard Of Paper Cups

Qhov zoo ntawm cov khob ntawv pov tseg ntawm kev ua lag luam sib txawv heev, nrog rau qhov tseem ceeb zais kev phom sij. Qee cov tuam txhab khob ntawv ntxiv cov tshuaj fluorescent whitening los ua kom lub khob zoo dua. Cov tshuaj fluorescent no tuaj yeem ua rau kev hloov pauv ntawm tes thiab dhau los ua qhov muaj peev xwm carcinogenic thaum nws nkag mus rau tib neeg lub cev. Txhawm rau kom ua tiav cov nyhuv dej tsis zoo ntawm cov khob ntawv, txheej txheej ntawm polyethylene waterproof zaj duab xis yog siv rau sab hauv phab ntsa thaum tsim khoom. Polyethylene yog cov tshuaj lom neeg muaj kev nyab xeeb tshaj plaws hauv kev ua zaub mov, tab sis yog tias cov khoom siv tsis zoo los yog cov txheej txheem ua tsis tau raws li tus qauv, nws tuaj yeem oxidize rau carbonyl compounds thaum lub sij hawm yaj los yog siv polyethylene rau khob ntawv. Carbonyl compounds tsis yooj yim rau evaporate ntawm chav tsev kub, tab sis tej zaum yuav evaporate thaum ncuav dej kub rau hauv khob ntawv, yog li cov neeg yuav hnov ​​​​cov ntxhiab tsw txawv txawv.
Txawm hais tias tsis muaj kev tshawb fawb los lees paub qhov kev puas tsuaj uas cov tshuaj carbonyl tso tawm los ntawm cov khob ntawv tuaj yeem ua rau tib neeg lub cev, kev hais lus theoretical, kev noj haus ntev ntev ntawm cov organic tebchaw no yeej muaj kev phom sij rau tib neeg lub cev. Dab tsi yog qhov kev txhawj xeeb ntau dua yog tias qee lub khob ntawv tsis zoo siv cov polyethylene rov ua dua tshiab, uas yuav raug hloov pauv thaum lub sijhawm rov ua dua, ua rau muaj ntau yam teeb meem uas muaj feem cuam tshuam rau hauv dej thaum siv. Lub teb chaws tau txwv tsis pub siv cov polyethylene rov ua dua tshiab rau kev ntim khoom noj, tab sis vim nws tus nqi qis, qee lub tsev lag luam me tseem siv nws tsis raug cai txhawm rau txuag nqi.