Qhov ntau yam ntawm PET fwj yog feem ntau overestimated - txawm tias lawv yog ob qho tib si zaub mov- cov ntaub ntawv qib, muaj qhov sib txawv ntawm qhov kev nyab xeeb thiab cov yam ntxwv ua haujlwm:

Cov theem pib: haum rau cov pa ntim cov kua, tab sis ntev - kev sib cuag nrog acidic / oily tshuaj yuav ua rau kom cov khoom laus

Reinforced qib: los ntawm kev hloov kho cov kua qaub thiab alkali tsis kam, haum rau ntim cov khoom xyaw corrosive xws li kua txiv hmab txiv ntoo thiab khoom qab zib.

Qib tshwj xeeb: Ntxiv cov pa thaiv txheej txheej lossis txhim kho cov qauv sib khi, tshwj xeeb yog siv rau zib ntab, cov roj tseem ceeb thiab lwm yam khoom siv oxidized yooj yim.

Qhov sib txawv ntawm pob tshab kuj cuam tshuam rau kev txiav txim siab siv. Lub raj mis pob tshab yog qhov tsim nyog rau kev nthuav tawm cov ntsiab lus, tab sis yog tias lawv xav tau kev tiv thaiv los ntawm lub teeb (xws li qee cov khoom noj qab haus huv), frosted los yog xim - ntxiv versions yog qhov kev xaiv tsim nyog.