Vim tias PVC yas raw cov ntaub ntawv muaj qhov zoo ntawm cov pob tshab siab, kev ruaj ntseg zoo thiab cov huab cua tsis zoo, nws yog dav siv hauv cov khoom ua si, khoom siv txhua hnub, nws pib qhov chaw, profiles thiab lwm yam. Cov kev xav tau zoo ntawm cov khoom yas no yog nruj heev, thiab yuav tsum tsis muaj qhov tsis xws luag xws li streaks, pores, whitening, halo, black spots, discoloration, tsis zoo gloss, thiab lwm yam. Yog li ntawd, nyob rau hauv tag nrho cov txheej txheem txhaj molding, cov ntaub ntawv raw. , cov khoom siv, thiab cov pwm yog nruj heev. thiab cov kev cai tshwj xeeb. Cov khoom tsim thiab pwm tsim yuav tsum tau them sai sai rau cov ntsiab lus hauv qab no: cov khoom yuav tsum tsis txhob muaj cov ces kaum ntse lossis hloov pauv sai li sai tau, thiab cov tuab yuav tsum tsis txhob hloov ntau yam kom tsis txhob muaj qhov degradation ntawm PVC; cov pwm yuav tsum muaj lub kaum sab xis ntawm ntau tshaj 10 degrees, thiab khaws cia txog 0.5 feem pua; Cov pwm kub yuav tsum tau tswj los ntawm cov dej txias, kom cov pwm kub tuaj yeem tswj tau ntawm 30 degree thiab 60 degree; cov pwm yuav tsum ci thiab chrome-plated los tiv thaiv corrosion; PVC yog cov khoom siv thaum tshav kub kub, thiab nws cov txheej txheem txhaj tshuaj molding yog qhov siab. Yog vim li cas yog tias kub melting kub heev los yog lub sij hawm cua sov ntev yuav ua tau yooj yim ua PVC synthesized, yog li tswj cov melting kub yog tus yuam sij rau txhaj molding PVC khoom.
