ʻO Polyurethane (PU), nona ka inoa piha he polyurethane, he pūhui polymer.Ua hana ʻia e Otto Bayer a me nā mea ʻē aʻe i ka makahiki 1937. ʻElua mau ʻano o ka polyurethane: polyester type a polyether type.Hiki ke hana ʻia i loko o nā plastic polyurethane (ka nui o ka ʻōpala), nā fibers polyurethane (i kapa ʻia ʻo spandex ma Kina), polyurethane rubber a me nā elastomers.
Loaʻa ka polyurethane palupalu i kahi ʻano laina thermoplastic.ʻOi aku ka maikaʻi o ke kūpaʻa, ke kūpaʻa kemika, ka resilience a me nā waiwai mechanical ma mua o nā mea PVC foam, a ʻoi aku ka liʻiliʻi o ka deformation compression.ʻO ka hoʻohaʻahaʻa wela maikaʻi, ke kani kani, ka anti-vibration a me ka hana anti-virus.No laila, hoʻohana ʻia ʻo ia e like me ka hoʻopili ʻana, ka insulation leo, a me nā mea kānana.
ʻO ka plastic polyurethane paʻakikī he māmā ke kaumaha, ke kani maikaʻi loa, ka hana hoʻoheheʻe wela, ke kūpaʻa kemika, ka hana uila maikaʻi, ka hana maʻalahi, a me ka haʻahaʻa o ka wai.Hoʻohana nui ʻia ia ma ke ʻano he mea hana no ke kūkulu ʻana, kaʻa, ʻoihana mokulele, a me ka insulation thermal.
ʻO nā waiwai o ka polyurethane elastomer ma waena o ka plastic a me ka rubber, ke kū'ēʻana i kaʻaila, ke kū'ē abrasion, ke kūpaʻa haʻahaʻa haʻahaʻa, ke kūpaʻaʻelemakule, ka paʻakikī kiʻekiʻe a me ka elasticity.Hoʻohana nui ʻia i ka ʻoihana kāmaʻa a me ka ʻoihana lapaʻau.Hiki ke hoʻohana ʻia ka Polyurethane e hana i nā adhesives, nā uhi, nā ʻili synthetic, etc.
Ua puka mai ka Polyurethane i ka makahiki 1930.Ma hope o ka aneane kanawalu makahiki o ka hoʻomohala ʻenehana, ua hoʻohana nui ʻia kēia mea ma ke kahua o ka lako hale, ke kūkulu hale, nā mea e pono ai i kēlā me kēia lā, ka lawe ʻana, a me nā mea pono home.
Aia ka mākeke polyurethane honua ma nā ʻāina i kūkulu ʻia ma ʻEulopa a me ʻAmelika.ʻO ka ʻāina ʻo ʻAsia-Pākīpika ka nui o Kina, Iapana, a me South Korea.ʻO nā ʻāina a me nā ʻāina i luna no 90% o ka mākeke polyurethane honua.Ma waena o lākou, ʻo ka nui o ka hoʻohana ʻana i ka polyurethane o koʻu ʻāina no ka hapalua o ka honua.Nui nā ʻano o nā huahana polyurethane i ka honua a hoʻohana ʻia lākou i nā ʻano hana like ʻole.Ma ka hopena o 2016, ua hiki i ka huina o ka polyurethane i ka honua ma kahi o 22 miliona tons.
Ka manawa hoʻouna: Jun-03-2019