I-PVC iwuhlobo lwepulasitiki olusetshenziswa kabanzi ezintweni zokwakha.Ngakho-ke, ngeke ithathelwe indawo isikhathi eside esikhathini esizayo, futhi izoba nethuba elihle lokufaka isicelo ezindaweni ezingathuthukisiwe esikhathini esizayo.
Njengoba sonke sazi, kunezindlela ezimbili zokukhiqiza i-PVC, enye iyindlela evamile yomhlaba wonke ye-ethylene, kanti enye iyindlela eyingqayizivele ye-calcium carbide e-China.Imithombo yendlela ye-ethylene ikakhulukazi i-petroleum, kanti imithombo yendlela ye-calcium carbide ikakhulukazi amalahle, i-limestone nosawoti.Lezi zinsiza zigxile kakhulu eShayina.Isikhathi eside, indlela yaseChina ye-PVC ye-calcium carbide ibilokhu isendaweni ehamba phambili ngokuphelele.Ikakhulukazi kusukela ngo-2008 kuya ku-2014, amandla okukhiqiza e-PVC e-PVC yendlela ye-calcium carbide iye yanda, kodwa futhi ilethe izinkinga eziningi zokuvikela imvelo.
Ukusetshenziswa kwamandla okukhiqizwa kwe-calcium carbide kukhulu kakhulu, ngakho-ke lokhu kuzoletha izinselelo ezithile ekuhlinzekeni kukagesi eChina.Ngenxa yokuthi ugesi ukhiqizwa ngokushisa amalahle, udinga ukusebenzisa amalahle amaningi, ngakho ukushiswa kwamalahle kuzongcolisa nakanjani umkhathi.Kodwa-ke, i-China yenze izinguquko ezithile kuzinqubomgomo phakathi neminyaka.I-China ihlezi ithuthukisa uchungechunge lwayo lwezimboni.Manje sesiyabona ukuthi i-China ithenge uwoyela omningi kwamanye amazwe, futhi amabhizinisi endawo ayakhuthazwa ukuba angenise uwoyela ukuze acwengisise imikhiqizo engaphansi komfula.Ngakho-ke, eminyakeni yamuva, abakhiqizi bezinqubo ze-ethylene abasha abasha baye bangezwa e-China, futhi wonke amandla amasha okukhiqiza e-PVC e-China eminyakeni yamuva amandla okukhiqiza inqubo ye-ethylene.Amandla okukhiqiza wendlela yaseChina ye-calcium carbide amise ukugunyazwa okusha.Ngakho-ke, esikhathini esizayo esiseduze, inani lezitshalo ze-ethylene e-China lizoqhubeka landa futhi inqubo ye-calcium carbide izoqhubeka nokuncipha.Ngokuzayo, umthamo wokuthekelisa waseShayina wenqubo ye-ethylene uzoqhubeka nokukhula, futhi kancane kancane ube umthengisi ohamba phambili emhlabeni wenqubo ye-ethylene ye-PVC.
Isikhathi sokuthumela: May-07-2022