Thaum PVC decomposes, dehydrochlorination tshwm sim rau cov txheej txheem conjugated polyolefin, uas yog xim daj. Tom qab ntawd, dab tsi ua rau kev laus thiab decomposition ntawm PVC, thiab peb tuaj yeem daws cov teeb meem no li cas? Tom ntej no, Lianda Chemical Co., Ltd. yuav tshawb xyuas qhov teeb meem thiab kev daws teeb meem ntawm PVC yellowing los ntawm ob qhov ntawm cov txheej txheem ntau lawm thiab cov mis.
Cov teeb meem siv thev naus laus zis
Nyob rau hauv cov txheej txheem ntawm extrusion, PVC yog rhuab thiab sheared los ntawm ntsia hlau thiab chim. Yog hais tias cov txheej txheem tsis tau teeb tsa zoo, nws yuav ua rau kev yaig thiab yellowing ntawm PVC rau qee yam. Qhov kev daws teeb meem yog raws li nram no: (1) qhov kev tshwm sim yellowing tuaj yeem hloov kho los ntawm kev txo qhov ntsuas qhov kub.
(2) nyob rau hauv qhov kev tsim nyog, txo kev sib hloov ceev ntawm lub cav loj thiab nce tus pub khoom noj tuaj yeem txo cov shear, ua cov ntaub ntawv hauv cov ntsia hlau zawj sib xyaw ntau tusyees, thiab ua rau lub stabilizer ua si lub luag haujlwm, kom txo tau lub suab qw.
(3) txoj kev pib ua haujlwm tsis raug kuj yuav ua rau cov khoom ua kom daj. Rov pib siv lub tshuab tuaj yeem daws cov teeb meem no.
Tsim cov teeb meem
Feem ntau tshwm sim hauv kev hloov ntawm cov kab ntawm cov yees ntxiv lossis cov chaw tsim khoom tom qab cov khoom daj. Kev daws yog raws li nram no:
(1) nce cov ntsiab lus ntawm stabilizer.
(2) kho cov roj hauv sab hauv thiab sab nraud kom sib npaug.
(3) txhawm rau daws cov teeb meem daj, peb yuav tsum ntxiv cov xim ntawm cov xim pleev xim lossis nce qhov feem ntawm fluorescent ntxuav hniav dawb tus neeg sawv cev.
(4) ntxiv UV absorbers nce ntxiv cov nyhuv los tiv thaiv kev laus, kev tiv thaiv ntev ntev los ntawm fading thiab qw!