ʻO Olyvinyl chloride, i ʻike nui ʻia ʻo PVC, ʻo ia ke kolu o ka polymer synthetic i hana nui ʻia, ma hope o ka polyethylene a me ka polypropylene.ʻO PVC kahi ʻāpana o nā kaulahao vinyls, nona pū kekahi EDC a me VCM.Hiki ke hoʻohana ʻia nā māka resin PVC no nā noi paʻa a maʻalahi;ʻO rigid ka mea kūʻai nui, akā ma nā ʻāpana ua pili like nā mea ʻelua.Hoʻohana nui ʻia ka hapa nui o ka PVC paʻa i ka ʻoihana kūkulu no ka paipu a me nā mea pono e like me ka paipu drain-waste-vent (DWV), sewer, paipu wai, conduit (electrical, telecommunications), a me ka paipu wai.Aia nā māka paʻa o PVC i loko o ka hale a me nā hale kūʻai hale no nā noi profile e like me nā puka, nā puka makani, nā pā, nā papa, nā tile vinyl nani.Hana ʻia kahi puʻupuʻu liʻiliʻi loa o ka PVC paʻa no nā hue, nā ʻeke ʻai ʻole ʻē aʻe, a me nā kāleka hōʻaiʻē.Hiki ke hoʻohana ʻia ka resin PVC i nā noi maʻalahi e ka hoʻohui ʻana o nā plasticizers.Ma kēia ʻano, hoʻohana ʻia ia i ka uea a me ka insulation uwea, ka ʻili hoʻohālike, ka hōʻailona, nā huahana inflatable, nā uhi hale, a me nā noi he nui kahi e pani ai i ka lāʻau.ʻO kēia pōmaikaʻi nui, me nā ʻano like me ka durability, nonflammability, kū'ē i nā kemika a me ka aila, ka paʻa ʻana o ka mīkini, a me ka maʻalahi o ka hana ʻana a me ka hoʻoheheʻe ʻana, e hōʻike ana e noho mau ana ʻo PVC i kahi koho hoʻokūkū a hoihoi no nā noi he nui i ke kūkulu ʻana a me nā ʻoihana, ka mahiʻai, nā huahana uila. , a me nā ʻoihana mālama ola kino.No laila, e noho mau ʻo PVC i thermoplastic nui i ka wā lōʻihi.
No ka mea he mea koʻikoʻi ka ʻoihana kūkulu i ka mākeke PVC, pili pono ke koi no PVC i ka ulu ʻana o GDP honua a me ka hoʻomohala waiwai.ʻOi aku ka nui o ka hoʻohana ʻana i ka PVC ikaika i nā ʻoihana hoʻomohala ma Asia, e like me ka ʻāina nui o Kina, India, Pakistan, Vietnam, a me Indonesia.ʻO nā mea hoʻokele maʻamau o ka hoʻohana ʻana i ka PVC no nā wahi i makemake nui ʻia he waihona heluna nui me kahi ʻano politika kūpaʻa e pono ai ka hoʻolilo nui ʻana i nā ʻoihana.ʻO kekahi kumu ʻo ka nui a me ka pae o ka hoʻomohala ʻana o ka ʻoihana mahiʻai o ka ʻāina.ʻO India, no ka laʻana, koi i nā ʻōnaehana koʻikoʻi e hoʻoinu i kāna mau ʻāina mahiʻai, he koi nui a hoʻomau no nā paipu PVC a me nā mea pono.Ma keʻano laulā, ʻoi aku ka haʻahaʻa o ka ulu ʻana i nā ʻoihana hoʻokele waiwai no ka mea ua hoʻokumu ʻia nā hale a me nā ʻoihana kumu.
Hōʻike ka papa kuhikuhi i ka hoʻohana honua i ka PVC:
ʻO ka ʻoihana vinyls kahi ʻāpana makua me ka mōʻaukala lōʻihi.Ua hoʻomaikaʻi ʻia ka ʻenehana, ka nui o ka hana, ka wāwae kaiapuni, a me ke kumukūʻai i ka manawa me ka hoʻonui ʻana i ka palekana a me ka maikaʻi o ka huahana.Ke hoʻomau nei ka hana ʻenehana a ua kālele nui ʻia i ka hoʻokūkū kūʻai, ʻoiai ʻo ka hana vinyl he ʻoihana honua maoli, a pono e hoʻokūkū nā mea hana ma loko o ko lākou mau wahi a me ka honua holoʻokoʻa.
ʻOi aku ka maʻamau o ka hana ʻana o PVC ma luna o ka meaʻai ethylene, koe wale nō ka ʻāina nui ʻo Kina, kahi e noho aliʻi ai ka acetylene feedstock.Ma ke kaʻina hana ethylene, hana ʻia ka EDC e ka chlorination pololei mai ka chlorine a me ka ethylene.Ma kahi hana hope, ua haki ia e hana i ka VCM.ʻO ka hana ʻana o VCM ka hopena i ka hoʻokuʻu ʻia ʻana o ka hydrogen chloride by-product, ka mea maʻamau i hana hou ʻia e hana hou i ka EDC ma o ka oxychlorination me ka ethylene hou.A laila, polymerized ʻo VCM e hana i ka PVC.I ka hana acetylene, akā naʻe, ʻaʻohe hana EDC i komo;akā, hana pololei ʻia ʻo VCM mai ka acetylene.ʻO Mainland China wale nō ka mākeke me nā lako PVC nui acetylene;akā naʻe, ma muli o ka nui o ka ʻoihana ʻāina ʻo Kina, ʻo ke ala acetylene ke helu nei i kahi hapa nui o ka nui o ka mana PVC honua.
Ka manawa hoʻouna: Apr-07-2022