Uhlalutyo lwendlela yophuhliso lweshishini laseTshayina lePVC (ipolyvinyl chloride) ngo-2021, umthamo wemveliso uya kuzinza.

Uhlalutyo lwendlela yophuhliso lweshishini laseTshayina lePVC (ipolyvinyl chloride) ngo-2021, umthamo wemveliso uya kuzinza.

1. Isishwankathelo sophuhliso lweshishini lePVC

I-Polyvinyl chloride (i-PVC) i-polymer eyenziwe yi-polymerization ye-vinyl chloride monomer (VCM) kwii-initiators ezifana ne-peroxides kunye ne-azo compounds okanye phantsi kwesenzo sokukhanya kunye nobushushu ngokwendlela ye-polymerization yamahhala.udidi olubalulekileyo.

I-Polyvinyl chloride resins ihlulwe ngokukodwa kwii-resin-purpose-purpose resins ngokuhambelana nokusetyenziswa kwazo: ii-resin-purpose-purpose-resin (G resins) zii-resin ezixutywe kunye nezixa eziqhelekileyo ze-plasticizers okanye izongezo zokwenza i-powders eyomileyo okanye emanzi ukuze kuqhutywe;i-resin yokunamathisela (i-P Resin) idla ngokuqulunqwa nge-plasticizer ukuze yenze i-resin yokunamathisela ukuze isetyenziswe;kukwakho nentlaka yomxube wePVC, eyintlaka yePVC ethatha indawo yentlaka yentlama ngokuxuba xa kusenziwa iplastisol yePVC.

Uluhlu oluphambili lwe-PVC resin

Iindlela eziphambili zokuvelisa i-PVC resin ziquka indlela yokumiswa, indlela yobuninzi, indlela ye-emulsion, indlela yesisombululo kunye ne-micro-suspension polymerization method.Ukusuka kwimbono yehlabathi, indlela yokunqunyanyiswa yindlela yokuvelisa i-PVC ngokubanzi-njongo ye-resin, ngelixa iindlela zokuvelisa i-PVC yokunamathisela i-resin yindlela ye-emulsion kunye ne-micro-suspension polymerization method.Ngenxa yeenkqubo ezahlukeneyo zokuvelisa, amandla okuvelisa i-resin ezimbini ayikwazi ukuguqulwa komnye nomnye.

2. Ikhonkco loShishino loshishino lwePVC

Inkqubo yokuvelisa i-PVC ikakhulu "indlela ye-calcium carbide" kunye "nendlela ye-ethylene", kwaye izinto zayo eziluhlaza ngamalahle kunye neoli ekrwada ngokulandelelanayo.Amazwe amaninzi ehlabathini asebenzisa indlela yeoli negesi.Ngenxa yokuba iTshayina ihlwempuzekile kwi-oyile kwaye ityebile ngamalahle, inkqubo yelizwe lam yePVC yokuvelisa isekelwe ikakhulu kwindlela ye-calcium carbide.

PVC ishishini chain

Izinto eziluhlaza zokuveliswa kwePVC nge-calcium carbide indlela ngamalahle.Ukusukela ngo-2012, imveliso yamalahle ekrwada yelizwe lam ibonise umkhwa wokuhla kuqala kwaye yanda.Ngokutsho kwe-National Bureau of Statistics, ukuphuma kwamalahle akrwada kuzwelonke kuya kufikelela kwi-4.13 yeebhiliyoni zeetoni ngo-2021, ukonyuka kweetoni ezizigidi ezingama-228 xa kuthelekiswa no-2020.

Izinto eziluhlaza zokuveliswa kwePVC ngendlela ye-ethylene yioli ekrwada.Ngokutsho kwe-National Bureau of Statistics, ilizwe lam liza kuvelisa iitoni ze-oyile ekrwada ezizizigidi ezili-198.98 ngo-2021, ukwanda kweetoni ezizizigidi ezi-4.06 xa kuthelekiswa no-2020. Phakathi kwabo, iitoni ze-oyile ekrwada eziyi-16.47 yezigidi zaveliswa ngoDisemba, unyaka- ukunyuka konyaka nge-1.7%.