Hana ʻia nā mea ʻelua i nā mea like, akā ʻokoʻa nā ʻāpana o nā mea, ʻo ke ʻano i hoʻoheheʻe ʻia he palupalu ma kekahi ʻaoʻao a paʻakikī ma kekahi.
ʻeke plastik PVC
ʻO ke kala maoli he melemele translucent a ʻālohilohi.ʻOi aku ka maikaʻi ma mua o ka polyethylene a me ka polypropylene, akā ʻoi aku ka liʻiliʻi ma mua o ka polystyrene.Ma muli o ka nui o nā mea hoʻohui, hiki ke hoʻokaʻawale ʻia i ka polyvinyl chloride palupalu a paʻakikī.Loaʻa i nā huahana palupalu ka maʻalahi, paʻakikī a paʻa.ʻO ka paʻakikī o nā huahana paʻakikī, ʻo ia ka polyethylene haʻahaʻa haʻahaʻa, akā inā haʻahaʻa ia ma mua o ka polypropylene, e hele mai ke keʻokeʻo ma nā piko.Nā huahana maʻamau: nā pā, nā paipu, nā kapuaʻi, nā mea pāʻani, nā puka a me nā puka makani, nā uea, nā mea kākau, a me nā mea ʻē aʻe.
ʻO ke kino a me ke kino o PVC (Polyvinyl Chloride) ʻO PVC paʻa kekahi o nā mea i hoʻohana nui ʻia.ʻO ka mea PVC kahi mea amorphous.I ka hoʻohana maoli ʻana i nā mea PVC, hoʻohui pinepine ʻia nā stabilizers, lubricants, auxiliary treatments, pigments, impactors a me nā mea hoʻohui ʻē aʻe.
ʻAʻole hiki ke puhi ʻia nā mea PVC, ikaika, kūpaʻa i ka wā a he kūpaʻa geometric maikaʻi loa.Kūleʻa nui ʻo PVC i nā mea oxidizing, nā mea hoʻemi a me nā waikawa ikaika.Eia naʻe, hiki ke hoʻopōʻino ʻia e nā ʻakika oxidizing concentrated e like me ka sulfuric acid concentrated a me ka acid nitric concentrated, a ʻaʻole kūpono no ka hoʻopili ʻana me nā hydrocarbons aromatic a chlorinated.
ʻO ka wela hoʻoheheʻe o PVC i ka wā o ka hoʻoili ʻana he mea koʻikoʻi kaʻina hana.Inā ʻaʻole kūpono kēia ʻāpana, hiki mai nā pilikia decomposition waiwai.ʻAʻole maikaʻi loa nā waiwai kahe o PVC a he haiki loa ka laulā kaʻina hana.Hoʻohana mau ʻia nā mea PVC haʻahaʻa haʻahaʻa haʻahaʻa, ʻoi aku ka paʻakikī o ka hana ʻana i nā mea PVC kaumaha nui (keia ʻano mea pono e hoʻohui i nā lubricants e hoʻomaikaʻi i nā waiwai kahe).He haʻahaʻa loa ka shrinkage rate o PVC, maʻamau 0.2-0.6%.
Ka manawa hoʻouna: ʻOkakopa-20-2021
