Kodi pulasitiki ya PVC ndi chiyani?

Pulasitiki ya PVC imatanthawuza kuphatikizika kwa PVC mumakampani opanga mankhwala.Dzina la Chingerezi: polyvinyl chloride, chidule cha Chingerezi: PVC.Ichi ndiye tanthauzo lomwe limagwiritsidwa ntchito kwambiri la PVC.

Mtundu wake wachilengedwe ndi wonyezimira komanso wonyezimira.Kuwonekera ndikwabwino kuposa polyethylene ndi polypropylene, komanso koyipa kuposa polystyrene.Kutengera kuchuluka kwa zowonjezera, zitha kugawidwa mu PVC yofewa komanso yolimba.Zinthu zofewa ndi zofewa komanso zolimba, komanso zimakhala zomata.Kuuma kwa zinthu zolimba ndipamwamba kuposa polyethylene yotsika kwambiri, koma yotsika kuposa ya polypropylene, ndipo padzakhala alubino pamapindikira.Mankhwala wamba: mbale, mapaipi, soles, zidole, zitseko ndi mazenera, zikopa waya, zolembera, etc. Ndi mtundu wa zinthu polima kuti ntchito chlorine atomu m'malo atomu haidrojeni mu polyethylene.

Wothamanga ndi chipata: zipata zonse wamba zitha kugwiritsidwa ntchito.Ngati mukukonza magawo ang'onoang'ono, ndi bwino kugwiritsa ntchito chipata chamtundu wa singano kapena chipata chomira;Kwa zigawo zokulirapo, ndi bwino kugwiritsa ntchito zipata zooneka ngati fan.Kutalika kochepa kwa chipata chamtundu wa singano kapena chipata chomira pansi pamadzi chiyenera kukhala 1mm;Makulidwe a chipata chooneka ngati fan sikuyenera kuchepera 1mm.

Zomwe zimagwiritsidwa ntchito: mapaipi operekera madzi, mapaipi apanyumba, zikwangwani zanyumba, zipolopolo zamakina abizinesi, zopangira zamagetsi zamagetsi, zida zamankhwala, zotengera chakudya, ndi zina zambiri.

Chemical ndi thupi katundu wa PVC okhwima PVC ndi chimodzi mwa zinthu kwambiri ntchito pulasitiki zipangizo.PVC ndi chinthu cha amorphous.Ma stabilizer, mafuta, othandizira othandizira, inki, zolimbitsa thupi ndi zina zowonjezera nthawi zambiri zimawonjezedwa ku zida za PVC pakugwiritsa ntchito.

PVC zakuthupi sizimayaka, kulimba kwambiri, kukana nyengo komanso kukhazikika kwazithunzi.PVC ili ndi kukana kwambiri kwa okosijeni, reductants ndi zidulo zolimba.Komabe, imatha kuipitsidwa ndi zidulo zoyikira oxidizing monga sulfuric acid yokhazikika ndi asidi wa nitric, ndipo sizoyenera nthawi zina kukhudzana ndi ma hydrocarbon onunkhira ndi ma chlorinated hydrocarbon.

Kutentha kwa kutentha kwa PVC panthawi yokonza ndikofunika kwambiri.Ngati chizindikiro ichi sichiyenera, chidzabweretsa vuto la kuwonongeka kwa zinthu.Makhalidwe otaya a PVC ndi osauka kwambiri, ndipo njira zake zimakhala zopapatiza kwambiri.Makamaka, zida za PVC zokhala ndi kulemera kwakukulu kwa mamolekyu ndizovuta kwambiri kuzikonza (zinthuzi nthawi zambiri zimafunikira kuwonjezera mafuta kuti ziwongolere mawonekedwe akuyenda), kotero zida za PVC zokhala ndi ma cell ang'onoang'ono zimagwiritsidwa ntchito.Kuchepa kwa PVC ndikotsika kwambiri, nthawi zambiri 0.2 ~ 0.6%.