PVC ndi chiyani?

PVCNdi chidule cha polyvinyl chloride, ndipo mawonekedwe ake ndi ufa woyera. PVC ndi imodzi mwa mapulasitiki asanu padziko lonse lapansi. Imagwiritsidwa ntchito kwambiri padziko lonse lapansi, makamaka pantchito yomanga. Pali mitundu yambiri ya PVC. Malinga ndi komwe kumachokera zipangizo zopangira, imatha kugawidwa m'magulu awiri.kashiamu kabidenjira ndinjira ya ethyleneZipangizo zopangira njira ya calcium carbide zimachokera makamaka ku malasha ndi mchere. Zipangizo zopangira ethylene zimachokera makamaka ku mafuta osakonzedwa. Malinga ndi njira zosiyanasiyana zopangira, zitha kugawidwa m'njira zoyimitsira ndi njira yopangira emulsion. PVC yomwe imagwiritsidwa ntchito popanga ndi njira yoyimitsira, ndipo PVC yomwe imagwiritsidwa ntchito m'munda wachikopa ndi njira yopangira emulsion. PVC yoyimitsira imagwiritsidwa ntchito kwambiri popanga: PVCmapaipiPVCmbiri, mafilimu a PVC, nsapato za PVC, mawaya ndi zingwe za PVC, pansi pa PVC ndi zina zotero. PVC ya emulsion imagwiritsidwa ntchito kwambiri popanga: magolovesi a PVC, chikopa chochita kupanga cha PVC, mapepala ophimba mapepala a PVC, zoseweretsa za PVC, ndi zina zotero.
Ukadaulo wopanga PVC nthawi zonse umachokera ku Europe, USA ndi Japan. Mphamvu yopanga PVC padziko lonse lapansi idafika matani 60 miliyoni, ndipo China idatenga theka la dziko lonse lapansi. Ku China, 80% ya PVC imapangidwa ndi njira ya calcium carbide ndi 20% ndi njira ya ethylene, chifukwa China nthawi zonse yakhala dziko lomwe lili ndi malasha ambiri komanso mafuta ochepa.