Lub thermal stability thiab lub teeb ceev ntawm PVC daim ntawv uas ua los ntawm blister tshuab tsis zoo

Nyob rau ntawm 150 degree C, hydrogen chloride pib decompose, thiab cov kev phiv tshwm sim tshwm sim nrog tus nqi ntawm plasticizer. Tsis tas li ntawd, kev cuam tshuam ntawm cov xim ntawm PVC yog xav txog seb cov xim puas cuam tshuam nrog PVC thiab lwm yam khoom uas ua rau PVC cov khoom, nrog rau kev tsiv teb tsaws tsis kam thiab kub tsis kam ntawm cov xim nws tus kheej. Qee cov khoom xyaw hauv cov xim tuaj yeem ua rau cov resin degradation. Xws li hlau ions thiab zinc ions yog catalysts rau degradation ntawm PVC resins. Yog li ntawd, kev siv cov hlau oxide (liab, daj, xim av thiab dub) cov xim los yog xim dawb xws li zinc oxide, zinc sulfide thiab lithopone yuav txo qhov thermal stability ntawm PVC resins. Qee cov xim pleev xim tuaj yeem cuam tshuam nrog PVC resin degradation khoom. Piv txwv li, ultramarine xiav pigments muaj cov kua qaub tsis zoo, yog li hauv cov txheej txheem ntawm cov xim PVC, lawv yuav cuam tshuam nrog hydrogen chloride tsim los ntawm kev puas tsuaj ntawm PVC thiab poob lawv cov xim zoo. Yog li ntawd, nyob rau hauv cov nqe lus ntawm cov xim PVC, xav txog cov yam ntxwv ntawm cov resin thiab lwm yam additives siv, ua ke nrog cov yam ntxwv ntawm cov xim. Cov teeb meem hauv qab no yuav tsum tau them sai sai rau thaum xaiv cov xim xim.