Yuav ua li cas yog vim li cas rau yellowing ntawm cov tsiaj yas hwj?

Thaum muas PET lub raj mis yas ntim khoom, qee tus neeg yuav pom tias cov khoom lag luam zoo ntawm qee tus neeg muag khoom yog qhov tsis zoo, thiab lub raj mis yas tsim muaj teeb meem xws li "daj" thiab "dawb pos", thiab lawv tsis paub vim li cas.

Vim li cas nws thiaj hloov xim? Vim tias PET muaj qee qhov dej ntawm hydrophilicity, thaum cov dej noo ntau tshaj qhov txwv, qhov hnyav molecular ntawm PET yuav txo qis thaum ua, ua rau muaj teeb meem xws li tawg thiab brittleness. Yog li yog tias cov khoom siv rov ua dua tshiab, qhov kev faib ua feem ntawm cov khoom siv rov ua dua yuav tsum tsis txhob siab dhau, thiab nws yuav tsum tau qhuav.

Qhov tshwm sim opaque "dawb pos" tshwm sim vim tias pwm kub tsis tswj tau zoo, lossis cov khoom kub tsis zoo tswj tau. Cov pwm yuav tsum tau khaws cia ntawm qhov kub thiab txias, thiab qhov txias yuav tsum ceev, kom cov nqi ntawm lub raj mis yas yuav pob tshab. zoo.

Thaum muas PET yas ntim lub raj mis, ntxiv rau kev saib xyuas ob qho teeb meem saum toj no, Jiaxing Ntim ceeb toom rau koj kom ua tib zoo saib seb lub thickness ntawm lub raj mis zoo li cas, seb lub peev xwm ntawm lub raj mis tsawg dhau, seb puas muaj roj. stains, seb qhov siab tsis sib npaug, seb lub caj dab yog concave, cov khoom siv thiab lwm yam teeb meem.