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A matsayin muhimmin sashi na dabarar samfuran PVC masu sassauƙa, mai hana filastik yana da babban tasiri akan aikin samfuran PVC masu sassauƙa. Idan ana buƙatar amfani da samfuran laushi na PVC (labulen ƙofa masu sanyi na PVC) a ƙananan yanayin zafi, dole ne a zaɓi masu hana filastik masu juriya ga zafin jiki mai kyau.
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DOP da DOTP su ne na'urorin filastik na gama gari da ake amfani da su don sanya PVC ta yi laushi, ta fi sassauƙa kuma ta fi sauƙin sarrafawa. Babban bambanci shine tsarin kwayoyin halittarsu: DOP, wanda yawanci ake kira DEHP, orthophthalate ne, yayin da DOTP, wanda kuma ake kira DEHT, terephthalate ne kuma galibi ana zaɓarsa azaman madadin da ba na orthophthalate ba.