1. Cov xwm txheej tseem ceeb rau kev tsim cov ntawv PET yog kev tswj xyuas lub sij hawm kom qhuav thiab cua kub dew point. Cov nyhuv ziab ncaj qha txiav txim siab lub cev thiab cov khoom siv kho tshuab thiab cov ntawv tso tawm. Thaum lub sij hawm ziab, yuav tsum tau them nyiaj mloog mus rau kev tswj kom qhuav qhov kub thiab lub sij hawm, tsis txhob siab dhau los yog qis heev. Yog hais tias qhov dew point tsis tuaj yeem txo qis, xyuas cov molecular sieve. Cov hnub nyoog molecular sieves tsis tuaj yeem nqus dej noo hauv huab cua, yog li lawv tsis tuaj yeem ua tiav lub hom phiaj ntawm ziab cov hlais. Lub sijhawm no, lub molecular sieve yuav tsum tau hloov.
2. Yog hais tias lub melting kub tshaj 280C, daim ntawv PET yuav discolored los yog decomposed, yog li ntawd lub melting kub yuav tsum tau tswj hauv qab no 280C.
3. Qhov sib txawv ntawm daim di ncauj tuag txiav txim siab qhov flatness thiab thickness uniformity ntawm lub phaj, thiab qhov kub ntawm peb-roller plays lub luag hauj lwm tseem ceeb hauv lub flatness thiab smoothness ntawm phaj. Lub yaj ntawm daim ntawv PET yuav tsum ceev nrooj zam qhov kub ntawm qhov chaw nrog ceev ceev crystallization tus nqi, thiab tam sim ntawd poob ntawm lub melting kub mus rau hauv qab ntawm crystallization kub, yog li qhov kev ncua deb ntawm cov tuag thiab lub calender yob yog ib qho tseem ceeb tshwj xeeb.