Feem ntau hais lus, yellowing ntawm cov khoom yas yog tshwm sim los ntawm cov laus lossis cov khoom siv tsis zoo. Feem ntau, PP tshwm sim los ntawm kev laus (ua rau muaj xeb). Vim tias muaj sab ntawm cov pab pawg sab ntawm polypropylene, nws txoj kev ruaj khov tsis zoo, tshwj xeeb tshaj yog thaum raug lub teeb. Rooj plaub. Feem ntau ntxiv cov teeb ci stabilizer. Raws li rau PE, vim tias tsis muaj ib pab sab, nws yuav tsis daj ntau hauv kev pib lossis siv.
PVC yuav tig daj, uas muaj feem cuam tshuam nrog cov mis ntawm cov khoom. Txhawm rau muab nws bluntly, nws yog oxidation. Qhov saum npoo ntawm qee tus pas nrig yog yooj yim rau oxidize, yog li nws yog qhov yuav tsum tau ua kev kho saum npoo ntawm cov pob master. Ntxiv rau qhov tsis zoo ntawm cov neeg quav tshuaj ntxiv thiab ua kom lub cev tsis zoo nyob rau hauv cov kab ke, uas feem ntau ua rau los ntawm kev laus, ntxiv cov kab mob antioxidant uas tsim nyog thiab cov neeg ua haujlwm tiv thaiv ultraviolet tuaj yeem txhim kho lub suab nrov ntawm PE thiab PP, tab sis ntau lub cev tiv thaiv phenolic antioxidant tshuab lawv tus kheej yuav coj me ntsis Tsis tas li ntawd, qee cov txheej txheem tiv thaiv kab mob thiab tiv thaiv kev tiv thaiv ultraviolet muaj qhov tawm tsam, yog li yuav tsum ceev faj thaum siv lawv. Ntxiv cov tshuaj pleev polymer ua kom nws tso tau los tsim cov txheej txheem ntawm cov tshuaj fluoropolymer rau ntawm phab ntsa ntawm lub tshuab, txhim kho cov txheej txheem kev ua tiav, kev kub siab thiab kev ua kom kub ntawm polyolefin resins, txhim kho cov khoom lag luam zoo, tsim tau, thiab txo tus nqi ntau lawm, txo lossis tshem tawm yaj. pob txha tawg, txo tus nqi seem.
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