Cov tshuaj sib xyaw PVC yog ua los ntawm kev sib xyaw ua ke ntawm PVC polymer RESIN thiab cov khoom ntxiv uas muab cov qauv tsim nyog rau kev siv kawg (Cov kav dej lossis Cov Qauv Rigid lossis Cov Qauv Yooj Yim lossis Cov Ntawv). Cov tshuaj sib xyaw no yog tsim los ntawm kev sib xyaw ua ke cov khoom xyaw, uas tom qab ntawd hloov mus ua cov khoom "gelled" nyob rau hauv kev cuam tshuam ntawm cua sov thiab lub zog shear. Nyob ntawm hom PVC thiab cov khoom ntxiv, cov tshuaj sib xyaw ua ntej gelation tuaj yeem yog cov hmoov ntws dawb (hu ua kev sib xyaw qhuav) lossis cov kua hauv daim ntawv ntawm cov tshuaj nplaum lossis cov kua.
Cov tshuaj sib xyaw PVC thaum tsim, siv cov yas ua kom yooj ywm, mus rau hauv cov khoom siv yooj ywm, feem ntau hu ua PVC-P.
Cov Khoom Sib Xyaws PVC thaum tsim tsis muaj cov yas rau cov ntawv thov khov kho yog hu ua PVC-U.
Kev sib xyaw ua ke ntawm PVC tuaj yeem piav qhia raws li hauv qab no:
Cov hmoov sib xyaw PVC qhuav (hu ua Resin), uas kuj muaj lwm yam khoom siv xws li cov tshuaj stabilizers, cov khoom ntxiv, cov khoom sau, cov khoom txhawb nqa, thiab cov tshuaj tiv thaiv hluav taws, yuav tsum tau sib xyaw ua ke hauv cov tshuab sib xyaw. Kev sib xyaw ua ke thiab kev faib tawm yog qhov tseem ceeb, thiab txhua yam ua raws li cov kev txwv kub uas tau teev tseg zoo.
Raws li cov qauv, cov PVC resin, plasticizer, Filler, stabilizer thiab lwm yam khoom pab tau muab tso rau hauv lub tshuab sib tov kub. Tom qab 6-10 feeb, tso rau hauv lub tshuab sib tov txias (6-10 feeb) rau kev sib tov ua ntej. Cov khoom sib xyaw PVC yuav tsum siv lub tshuab sib tov txias kom tiv thaiv cov khoom lo rau tom qab lub tshuab sib tov kub.
Cov khoom sib tov tom qab ua kom yas, sib tov thiab sib kis kom sib npaug ntawm 155 ° C-165 ° C ces pub rau cov khoom sib tov txias. Cov khoom sib xyaw PVC yaj ces pelletised. Tom qab pelletizing, qhov kub ntawm cov granules tuaj yeem poob rau 35 ° C-40 ° C. Tom qab ntawd tom qab cua txias vibrating sieve, qhov kub ntawm cov khoom me me poob qis dua chav tsev kom xa mus rau qhov kawg khoom silo rau kev ntim khoom.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-11-2022