ʻO Polyurethane (PU), ka inoa piha o ka polyurethane, he polymer compound, i hana ʻia ma 1937 e Otto Bayer a me nā mea ʻē aʻe. ʻElua mau ʻāpana nui ka Polyurethane: polyester a me polyether. Hiki ke hana ʻia i loko o nā plastic polyurethane (ka nui o ka ʻōpala), nā fibers polyurethane (i ʻike ʻia ʻo spandex ma Kina), polyurethane rubber a me nā elastomers. ʻO ka Polyurethane kahi mea polymer i kūpono no ka hoʻohana ʻana ma ke ʻano he uhi huila i ka hana ʻana i nā casters ʻoihana.
ʻO nā pōmaikaʻi nui o nā casters polyurethane e like me kēia:
ʻO ka mea mua, ka hana o ka laulā hiki ke hoʻololi
Hiki ke hoʻololi ʻia kekahi mau hōʻailona hana kino a me ka mīkini ma o ke koho ʻana i nā mea maka a me nā ʻano, i loko o kahi ʻano o nā loli maʻalahi, i mea e hoʻokō ai i nā koi kūikawā o ka mea hoʻohana no ka hana huahana.
ʻO ka lua, ʻoi aku ka pale abrasion
Ma ke alo o ka wai, ka aila a me nā ʻano hana hoʻomaʻemaʻe ʻē aʻe, ʻo ka polyurethane casters e hoʻopaʻa i ke kūpaʻa pinepine i nā manawa he nui a hiki i nā manawa he nui o nā mea lāʻau maʻamau. ʻO nā mea metala e like me ke kila a me nā mea paʻakikī ʻē aʻe, akā ʻaʻole pono e pale i ka lole!
ʻO ke kolu, nā ʻano hana, ka hoʻohana ākea
Hiki ke hoʻoheheʻe ʻia nā elastomers polyurethane me ka lāʻau kumu nui ma o ka plasticizing, mixing and vulcanizing (MPU); hiki iā lākou ke hana i loko o ka pahu wai, ka ninini ʻana a me ka hoʻoheheʻe ʻana a i ʻole ka hoʻoheheʻe ʻana, ka sila a me ka hoʻoheheʻe centrifugal (CPU); hiki ke hana ʻia i mau mea granular a me nā plastik maʻamau e ka injection, extrusion, calendering, blow molding a me nā kaʻina hana ʻē aʻe (CPU). ʻO nā ʻāpana i hoʻoheheʻe ʻia a i ʻole ʻia i loko o kahi ʻano paʻakikī, hiki ke ʻoki ʻia, wili, wili a me nā hana mīkini ʻē aʻe.
ʻO ka hā, kaʻaila kū'ē, ke kū'ē ozone, ke kū'ēʻana o ka wā kahiko, ke kū'ēʻana o ka radiation, ka haʻahaʻa haʻahaʻa haʻahaʻa, ka hoʻouna kani maikaʻi, ka ikaika adhesive ikaika, ka biocompatibility maikaʻi a me ka pili koko. ʻO kēia mau pōmaikaʻi ke kumu i hoʻohana nui ʻia ai ka polyurethane elastomers i ka pūʻali koa, aerospace, acoustics, biology a me nā kula ʻē aʻe.
Ka manawa hoʻouna: ʻOkakopa-30-2023