Tsawg dua ntawv khob uas ntawv khob

Saib tuaj, yuav luag txhua lub tsev thiab npaj qhwv tas ib daim ntawv so ntswg khob, ib leeg ib tug, txawb tus uas, huv thiab yooj yim, yuav muab ib khob hom tau muab zais teeb meem ntau heev. Ntawv khob rau hauv lub lag luam faib ua peb: thawj yog ua los ntawm cov duab los qhia dawb pab roj thiab dej. Yog qhov ntawv waxed khob haus dej, ntev raws li qhov kom siab li cov dej kub tshaj 40 degrees centigrade ntxiv mus, cov ciab yuav yaj, tso carcinogens ntawm polycyclic uas muaj ntxhiab hydrocarbons. Third yog ntawv thiab khob yas, yog hais tias tsis zoo xaiv yuav tej khoom siv los yog kev ua tsis dhau, hauv polyethylene kub-yaj los yog coated ntawv khob yuav ua pyrolysis in the process of hloov, yuav ua rau mob cancer. Thiaj li yuav ua rau kom cov toughness thiab mob heev ntawm lub khob, khob ntawv yuav ntxiv ib plasticizer. Yog koob yog siv heev siab los yog txhaum cai ntawm plasticizers, kev mob nyuab nyuab heev yuav lav tsis tau.