Vim yog lub hauv paus ntawm noo noo nqus ntawm carbon dub, dub compound PE yog rhiab heev rau ya raws.Lub sij hawm cia ntev los yog qhov chaw cia hnyav yuav ua rau kom cov dej noo ntau ntxiv.Raws li cov xwm txheej dav dav thiab kev siv, peb pom zoo kom preheating tsawg kawg yog 1 teev thiab qhov kub siab tshaj plaws ntawm 90 ° C.