He aha ka ʻokoʻa ma waena o nā mea PVC a me EVA?

Me ka ulu mālie o ka manawa, ua loli nui ke ola o ka poʻe, a ua maʻalahi ka hoʻohana ʻana i nā mea hou like ʻole. No ka laʻana, PVC a meEVAHoʻohana nui ʻia nā mea i kēia mau lā, akā hoʻopili maʻalahi ka poʻe iā lākou. . A laila, e hoʻomaopopo mākou i ka ʻokoʻa ma waena o nā mea PVC a me EVA.

1. Nā hiʻohiʻona a me ke ʻano like ʻole:
Hiki ke hoʻokaʻawale ʻia ʻo PVC ma ka ʻāina nui o Kina i ʻelua mau ʻano: haʻahaʻa haʻahaʻa a pili i ka nohona a me nā mea ʻawaʻawa a me nā mea kūlohelohe. ʻO nā mea EVA nā mea pili i ke kaiapuni. He palupalu ka ili o EVA; ʻoi aku ka ikaika o kona ʻano paʻakikī ma mua o ka PVC, a manaʻo ʻo ia ka paʻa (akā, ʻaʻohe kelu ma ka ʻili); he keʻokeʻo a ʻikea, a ʻo ke kiʻekiʻe, ʻano like ka manaʻo a me ka manaʻo me ka kiʻi ʻoniʻoni PVC, no laila pono e uku ʻia e hoʻokaʻawale iā lākou.

2. Nā hana like ʻole:
ʻO PVC kahi resin thermoplastic polymerized e ka vinyl chloride ma lalo o ka hana a kahi mea hoʻomaka. He homopolymer ia o ka vinyl chloride. ʻO Vinyl chloride homopolymer a me vinyl chloride copolymer i kapa ʻia ʻo vinyl chloride resin. ʻO PVC ka mea i hana nui ʻia ma ka honua a ua hoʻohana nui ʻia. ʻO ke kumu molekala o EVA (ethylene vinyl acetate copolymer) ʻo C6H10O2 a ʻo kona kaumaha molekala ʻo 114.1424. Hoʻohana ʻia kēia mea e like me nā kiʻiʻoniʻoni like ʻole, nā huahana foam, nā mea hoʻoheheʻe wela a me nā mea hoʻololi polymer.

3. ʻOkoʻa ka palupalu a me ka paʻakikī: ʻO ke kala maoli o PVC he melemele iki, translucent a ʻālohilohi. ʻOi aku ka maikaʻi ma mua o ka polyethylene a me ka polystyrene, akā ʻoi aku ka maikaʻi ma mua o ka polystyrene. Ma muli o ka nui o nā mea hoʻohui, ua māhele ʻia i ka polyvinyl chloride palupalu a paʻakikī. Hiki ke maʻalahi a paʻakikī nā huahana palupalu, ʻoiai ʻoi aku ka paʻakikī o nā huahana paʻakikī ma mua o ka polyethylene haʻahaʻa haʻahaʻa. , a haʻahaʻa ma lalo o ka polypropylene, e loaʻa ke keʻokeʻo ma ka helu inflection. ʻOi aku ka palupalu o ka EVA (ethylene vinyl acetate copolymer) ma mua o PVC.

4. He okoa na kumu kuai:
ʻO nā mea PVC: ʻO ke kumukūʻai no ke tona ma waena o 6,000 a me 7,000 yuan. Loaʻa i nā mea EVA nā mānoanoa like ʻole a me nā kumukūʻai. ʻO ke kumu kūʻai ma kahi o 2,000 / cubic mika.

5. Nā ʻano like ʻole:
He maikaʻi nā waiwai insulation uila ʻo PVC, hiki ke hoʻohana ʻia e like me ke ʻano haʻahaʻa haʻahaʻa haʻahaʻa, a maikaʻi hoʻi kona kūpaʻa kemika. Ma muli o ka maikaʻi ʻole o ka wela o ka polyvinyl chloride, ʻo ka hoʻomehana lōʻihi e hana i ka decomposition, hoʻokuʻu i ke kinoea HCl, a me ka discoloration o ka polyvinyl chloride. No laila, haiki ka laulā noi, a ʻo ka mahana hoʻohana maʻamau ma waena o -15 a me 55 degere. Paʻa ka EVA ma ka lumi wela. Ke hoʻomehana ʻia, hoʻoheheʻe ʻia a lilo i wai e hiki ke kahe a loaʻa kekahi viscosity.