Feem ntau hais lus, yellowing ntawm cov khoom yas yog tshwm sim los ntawm kev laus los yog degradation ntawm cov ntaub ntawv.Feem ntau,PPyog tshwm sim los ntawm kev laus (degradation).Vim muaj cov pab pawg sab nraud ntawm polypropylene, nws qhov kev ruaj ntseg tsis zoo, tshwj xeeb tshaj yog nyob rau hauv cov teeb pom kev zoo.Feem ntau, lub teeb stabilizer ntxiv.Raws li rauPE, txij li tsis muaj sab hauv paus, tsis muaj ntau qhov teeb meem ntawm yellowing nyob rau hauv kev ua hauj lwm los yog thaum ntxov siv.PVCyuav tig daj, uas yog ze ze rau cov qauv ntawm cov khoom.Txhawm rau muab nws bluntly, nws yog oxidation.Lub nto ntawm ib co masterbatches yog ib qho yooj yim rau oxidized, yog li nws yog tsim nyog los nqa tawm kev kho mob nto ntawm lub masterbatches.
Ntxiv rau qhov tsis zoo additives thiab impurities nyob rau hauv lub cev, kuv xav tias lawv yog feem ntau tshwm sim los ntawm kev laus.Ntxiv cov tshuaj antioxidant tsim nyog thiab cov tshuaj tiv thaiv ultraviolet tuaj yeem txhim kho yellowing ntawm PE thiab PP, tab sis muaj ntau yam cuam tshuam phenolic antioxidant systems lawv tus kheej yuav ua rau yellowing me ntsis.Tsis tas li ntawd, qee cov kab mob antioxidant thiab cov tshuaj tiv thaiv ultraviolet muaj cov teebmeem tiv thaiv, yog li ceev faj thaum siv lawv.Polymer lubricant yog ntxiv los ua ib lub fluoropolymer flowable zaj duab xis rau ntawm lub tshuab phab ntsa, txhim kho cov extrusion ua kev ua tau zoo, extrusion siab thiab ua kub ntawm polyolefin resin, txhim kho cov khoom zoo thiab kev tsim khoom, txo cov nqi tsim khoom, txo lossis tshem tawm cov tawg tawg, thiab txo cov khoom seem. tus nqi.
1. Muaj cov khoom siv raw hu ua plasticizer hauv cov khoom yas, uas feem ntau ua lub luag haujlwm tiv thaiv kev laus, tab sis nws yuav ua rau huab cua tsis zoo, yog li thaum lub plasticizer txo qis, cov xim yuav ploj mus, thiab elasticity ntawm cov yas kuj yuav txo. , uas yuav ua rau nws nkig thiab daj.
2. Lub yellowing ntawm cov thawv yas tom qab ntau lawm los yog siv rau lub sij hawm ntev yog vim kev laus ntawm cov ntaub ntawv siv, los yog nws yuav ua tau tom qab degradation.Qhov tshwm sim loj tshaj plaws yog qee lub thawv yas dawb, xws li qee lub thawv dawb thiab cov thawv yas.
3. Qhov laj thawj feem ntau yog kev laus ntawm cov khoom yas.Yog vim li cas yog tias polypropylene muaj kev tawm tsam sab saud.Nws stability tsis zoo heev, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm lub sij hawm ntev qhuav.
4. Yog li ntawd, ua kom cov yas dawb nyob ntev, sim ua kom tsis txhob muaj lub teeb muaj zog.Yog hais tias nws muaj feem xyuam rau cov zaub mov, sim siv cov pob tshab thiab tsis muaj xim.Yog tias koj xav kom tshem tawm qhov tshwm sim no, koj tuaj yeem ntxiv qee yam ntawm tus stabilizer.
Post lub sij hawm: Sep-09-2022