PVC ndi chiyani?

Zithunzi za PVCndi lalifupi la polyvinyl chloride, ndipo mawonekedwe ake ndi ufa woyera. PVC ndi imodzi mwa mapulasitiki asanu padziko lonse lapansi. Amagwiritsidwa ntchito kwambiri padziko lonse lapansi, makamaka pantchito yomanga. Pali mitundu yambiri ya PVC. Malinga ndi gwero la zopangira, zikhoza kugawidwa mucalcium carbidenjira ndinjira ya ethylene. Zopangira za njira ya calcium carbide makamaka zimachokera ku malasha ndi mchere. Zopangira zopangira ethylene makamaka zimachokera ku mafuta osapsa. Malinga ndi njira zosiyanasiyana zopangira, zitha kugawidwa mu njira yoyimitsidwa ndi njira ya emulsion. The PVC ntchito m'munda yomanga kwenikweni kuyimitsidwa njira, ndi PVC ntchito m'munda chikopa kwenikweni emulsion njira. Kuyimitsidwa PVC zimagwiritsa ntchito kupanga: PVCmapaipi, PVCmbiri, mafilimu PVC, PVC nsapato, PVC mawaya ndi zingwe, PVC pansi ndi zina zotero. Emulsion PVC zimagwiritsa ntchito kupanga: magolovesi PVC, PVC yokumba zikopa, PVC wallpaper, zoseweretsa PVC, etc.
Ukadaulo wopanga PVC nthawi zonse umachokera ku Europe, USA ndi Japan. Kuchuluka kwa PVC padziko lonse lapansi kunafika matani 60 miliyoni, ndipo China idawerengera theka la dziko lapansi. Ku China, 80% ya PVC imapangidwa ndi njira ya calcium carbide ndi 20% ndi ndondomeko ya ethylene, chifukwa China nthawizonse yakhala dziko la malasha ndi mafuta ochepa.