He aha ka PVC?

PVChe pōkole no ka polyvinyl chloride, a he pauda keʻokeʻo kona helehelena. ʻO PVC kekahi o nā plastik nui ʻelima o ka honua. Hoʻohana nui ʻia ia ma ka honua holoʻokoʻa, ʻoi aku hoʻi ma ke kahua kūkulu. Nui nā ʻano PVC. Wahi a ke kumu o nā mea maka, hiki ke māhele ʻia icalcium carbideʻano a meʻano ethylene. No ka lanahu a me ka paʻakai ke kumu o ka calcium carbide method. No loko mai o ka aila ʻaila nā mea maka no ka hana ethylene. Wahi a nā kaʻina hana like ʻole, hiki ke hoʻokaʻawale ʻia i ke ʻano o ka suspension a me ke ʻano emulsion. ʻO ka PVC i hoʻohana ʻia i ke kahua kūkulu ʻo ia ke ʻano o ka hoʻokuʻu ʻana, a ʻo ka PVC i hoʻohana ʻia i ka māla ʻili ʻo ia ke ʻano emulsion. Hoʻohana nui ʻia ʻo Suspension PVC e hana: PVCpaipu, PVCprofiles, Nā ki'i'oni'oni PVC, nā kāma'a PVC, nā kaula PVC a me nā kaula, nā papahele PVC a pēlā aku. Hoʻohana nui ʻia ka Emulsion PVC e hana: nā mīkina lima PVC, ka ʻili kūlohelohe PVC, ka pepa kiʻi PVC, nā mea pāʻani PVC, etc.
Hele mai ka ʻenehana hana PVC mai ʻEulopa, USA a me Iapana. Ua hōʻea ka mana hana PVC honua i 60 miliona tons, a ʻo Kina ka hapa o ka honua. Ma Kina, 80% o ka PVC i hana ʻia e ka calcium carbide process a me 20% e ka ethylene process, no ka mea, he ʻāina mau ʻo Kina me ka nui o ka lanahu a me ka liʻiliʻi o ka aila.