Magaca astaanta PVC ee Shiinaha waxaa badanaa la isticmaalaa shahaadada polymerization ama sharraxaadda moodeelka.Tusaale ahaan, toddobo nooc oo PVC ah (calaamadaha S-800, SG-7) ama siddeed nooc oo PVC ah (calaamadaha S-700, SG-8) oo leh tayo wanaagsan ayaa si kala duwan loogu calaamadin doonaa soosaarayaal kala duwan.Badankooda waxaa lagu calaamadeeyay SG iyo hal nambar si ay u matalaan moodooyinka PVC.Tirada boqollaal iyo kumanaan calaamadood ayaa ka dhigan heerka polymerization (tiro isku mid ah ayaa ka dhigan isla badeecad, sida Qingdao Haijing HS1000, Shanghai chlor-alkali WS1000,Qilu Petrochemical S1000Dhammaan waxay ka dhigan yihiin shan nooc oo PVC ah).
Isbarbardhigga in aagga gurigu ay fuliso walxaha xaashida daahsoon waxay adeegsataa 7, 8 nooc oo ka badan, MAXAA caadi ahaan loo isticmaalo waa QILU PETROCHEMICAL, Shanghai CHLOR-ALKALI, CANG HUA, Qingdao HAI JING, DAGU HUA'S wax soo saarka.
La-hawlgalayaasha cusub iyo kuwa xiisaynaya qaarkood ayaa laga yaabaa inay waydiiyaan sababta soosaarayaasha xaashida u door bidaan inay isticmaalaan Nooca 7 iyo nooca 8 halkii ay ka isticmaali lahaayeen nooca 5. Mid kale ma jiro, laakiin todoba, siddeed nooc oo PVC polymerization degree waa mid hooseeya, fududahay in la farsameeyo.Ma aha oo kaliya xaashida, tuubooyinka PVC, tuubooyinka PVC ayaa sidoo kale ku habboon isticmaalka.
Warshadaha tuubooyinka sida caadiga ah waxay isticmaalaan nooca 5. Qayb sare oo kalsiyum carbonate ah ayaa sidoo kale lagu daray si loo yareeyo kharashyada, taas oo aan lagu faahfaahin halkan.
Sannadahaas foosha xun, PVC-ga waddankeena waxaa loo qaybiyay siddeed nooc, kuwaas oo kala ah nooca 1 ilaa 8. Siddeedda walaalaha ah waxaa lagu tijaabiyay (ku burburay) suuqa, waxaana hadhay afar kaliya.
Nooca 3(degree polymerization 1300, inta badan loo isticmaalo silig wax soo saarka iyo cable, film calending), nooca 5 (polymerization degree 1000, inta badan loo isticmaalo profiles, tuubooyinka), iyo nooca 7 siddeedaad.
Wax-soo-saarka guud ee PVC-ga iyadoo la adeegsanayo habka hakinta, xulashada kala-firdhinta cayrinta kala duwan, waxaa la heli karaa qaab-dhismeedka walxaha iyo qaab-dhismeedka laba nooc oo kala duwan oo xabagta ah.
Waqtiga boostada: Agoosto-08-2022