Ukuhlaziywa komkhuba wokuthuthukiswa komkhakha waseChina wePVC (polyvinyl chloride) ngo-2021, amandla okukhiqiza azozinza.

Ukuhlaziywa komkhuba wokuthuthukiswa komkhakha waseChina wePVC (polyvinyl chloride) ngo-2021, amandla okukhiqiza azozinza.

1. Uhlaka lokuthuthukiswa kwemboni ye-PVC

I-Polyvinyl chloride (PVC) iyi-polymer eyakhiwe yi-polymerization ye-vinyl chloride monomer (VCM) kuma-initiators afana nama-peroxides nama-azo compounds noma ngaphansi kwesenzo sokukhanya nokushisa ngokuvumelana nenqubo ye-polymerization yamahhala.isigaba esibalulekile.

Ama-resin e-polyvinyl chloride ahlukaniswa ngokuyinhloko abe ama-resin enhloso evamile futhi anamathisele ama-resin ngokuvumelana nokusetshenziswa kwawo: ama-resin enhloso evamile (ama-G resins) ama-resin ahlanganiswe namanani ajwayelekile ama-plasticizers noma izithasiselo ukuze enze izimpushana ezomile noma ezimanzi ukuze zicutshungulwe;ama-resin okunamathisela (P Resin) ngokuvamile akhiwe nge-plasticizer ukuze enze inhlaka yokunamathisela ukuze isetshenziswe;kukhona ne-PVC blend resin, okuyinhlaka ye-PVC ethatha indawo yengxenye ye-paste resin ngokuyihlanganisa lapho kwakhiwa i-PVC plastisol.

Ukuhlukaniswa okuyinhloko kwe-PVC resin

Izindlela eziyinhloko zokukhiqiza ze-PVC resin zihlanganisa indlela yokumiswa, indlela yobuningi, indlela ye-emulsion, indlela yesisombululo kanye nendlela ye-polymerization encane yokumiswa.Ngokombono wembulunga yonke, indlela yokumiswa iyindlela eyinhloko yokukhiqiza ye-PVC general-purpose resin, kuyilapho izindlela zokukhiqiza ze-PVC unama resin ziyindlela ye-emulsion kanye nendlela ye-polymerization micro-suspension.Ngenxa yezinqubo ezahlukene zokukhiqiza, amandla okukhiqiza ama-resin amabili awakwazi ukuguqulelwa kwenye.

2. Uchungechunge lwezimboni lwemboni ye-PVC

Inqubo yokukhiqiza ye-PVC ngokuyinhloko "indlela ye-calcium carbide" kanye "nendlela ye-ethylene", futhi izinto zayo zokusetshenziswa zingamalahle namafutha aluhlaza ngokulandelana.Amazwe amaningi emhlabeni asebenzisa umzila kawoyela negesi.Ngenxa yokuthi iShayina impofu ngowoyela futhi inothile ngamalahle, inqubo yokukhiqiza ye-PVC yezwe lami isekelwe kakhulu endleleni ye-calcium carbide.

I-PVC industry chain

Impahla eluhlaza yokukhiqizwa kwe-PVC nge-calcium carbide indlela ngamalahle.Kusukela ngo-2012, umkhiqizo wamalahle wezwe lami ukhombise ukuthambekela kokwehla kuqala bese anda.Ngokusho kweNational Bureau of Statistics, ukuphuma kwamalahle kuzwelonke kuzofinyelela kumathani ayizigidi eziyizinkulungwane ezingama-4.13 ngo-2021, okuwukunyuka kwamathani ayizigidi ezingama-228 uma kuqhathaniswa no-2020.

Izinto ezisetshenziswayo zokukhiqizwa kwe-PVC ngendlela ye-ethylene uwoyela ongahluziwe.Ngokusho kweNational Bureau of Statistics, izwe lami lizokhiqiza amathani ayizigidi eziyi-198.98 kawoyela ongahluziwe ngo-2021, okuwukunyuka kwamathani ayizigidi ezi-4.06 uma kuqhathaniswa no-2020. Phakathi kwawo, amathani ayizigidi eziyi-16.47 kawoyela ongahluziwe akhiqizwa ngoDisemba, unyaka nonyaka- ukunyuka konyaka ngo-1.7%.