Cov Excipients ntawm PVC cov khoom siv hluavtaws muaj toxicity
Apr 16, 2022
1. Polyvinyl chloride yog ib hom yas feem ntau siv. Nws yog ib qho resin muaj li ntawm polyvinyl chloride resin, plasticizer thiab antioxidant. Nws yog non-toxic nyob rau hauv nws tus kheej.
2. Cov plasticizer, antioxidant thiab lwm yam khoom tseem ceeb ntxiv rau cov yas yog tshuaj lom. Cov yas yas hauv PVC yas rau kev siv txhua hnub feem ntau yog siv dibutyl terephthalate, dioctyl phthalate, thiab lwm yam. cov tshuaj no yog tshuaj lom, thiab cov tshuaj antioxidant lead stearate ntawm PVC kuj yog tshuaj lom.
3. Polyvinyl chloride (PVC) cov khoom uas muaj cov hmoov lead ntsev antioxidant yuav precipitate txhuas nyob rau hauv kev sib cuag nrog ethanol, ether thiab lwm yam kuab tshuaj. PVC uas muaj cov hmoov lead ntsev yog siv los ua cov ntim khoom noj. Thaum nws sib ntsib nrog cov khob cij kib, kib ncuav, kib ntses, cov khoom noj nqaij, khoom qab zib thiab khoom noj txom ncauj, cov hlau lead molecules yuav diffuse rau hauv roj. Yog li ntawd, PVC hnab yas tsis tuaj yeem siv los ntim cov khoom noj, tshwj xeeb tshaj yog cov zaub mov oily.
4. PVC cov khoom yas yuav maj mam decompose hydrogen chloride roj ntawm qhov kub thiab txias, xws li txog 50 degree, uas yog teeb meem rau tib neeg lub cev. Yog li ntawd, cov khoom siv PVC tsis haum rau ntim khoom noj.
