Nā kahua noi a me ka hoʻomohala ʻana i nā mea elastic polyurethane

ʻO nā elastomers polyurethane no nā polymers poloka, ʻo ia hoʻi, ua haku ʻia nā macromolecules polyurethane me nā "mau ʻāpana palupalu" a me "nā ʻāpana paʻakikī" a hana i kahi ʻano hoʻokaʻawale micro-phase, kahi e hoʻopuehu ʻia ai nā ʻāpana paʻakikī (mai nā isocyanates a me nā kaulahao kaulahao). ʻāpana ʻāpana māhele (mai nā oligomer polyols) e pāʻani i ke kuleana o nā kiko hoʻopili kino.No laila, ke hoʻohālikelike ʻia me nā ʻāpana synthetic ʻē aʻe (elastomers), ʻoi aku ka ikaika o ka polyurethane elastomers a me ke kūpaʻa ʻana, hiki ke mālama ʻia ka elongation kiʻekiʻe ke kiʻekiʻe ka paʻakikī.

ʻO nā mea polyurethane elastic, i kapa ʻia ʻo "CASE" ma waho, ʻo ka nui o nā huahana polyurethane elastomer kuʻuna, nā mea paving e like me ka polyurethane plastic runways, polyurethane waterproof coatings, adhesives, sealants, potting adhesives, etc., e helu ana ma kahi o 40% o ka huina nui. nā huahana polyurethane.ʻO ka hapa nui o nā huahana i hoʻōla ʻia o nā mea CASE (wai-wai a me nā huahana solvent ma hope o ka wehe ʻana i ka wai a me nā mea hoʻoheheʻe) he mau mea polyurethane elastic ʻole.ʻO ka resin ili synthetic PU, kekahi mau uhi a me nā mea hoʻopili he mea hoʻoheheʻe a i ʻole nā ​​​​huahana wai, hiki ke manaʻo ʻia he mau mea polyurethane elastomer ma ke ʻano ākea.Ma ka manaʻo haiki, ʻo ka polyurethane elastomers e pili ana i castable polyurethane elastomers (CPU), thermoplastic polyurethane elastomers (TPU) a me nā polyurethane elastomers (MPU) hui pū ʻia, he 10% a emi iki paha o ka nui o ka polyurethane.ʻO CPU a me TPU ka polyurethane elastomers nui, a aia ko lākou ʻokoʻa i ke kaʻina hana a me nā mea hoʻonui kaulahao.ʻO kēia ʻano polyurethane elastomer maʻamau, ʻike ʻia hoʻi ʻo "polyurethane rubber", no kahi ʻano kūikawā o ka synthetic rubber.ʻO ka polyurethane elastomer kiʻekiʻe ka mea maikaʻi loa i ka lole pale lole ma waena o nā mea polymer synthetic a pau, i kapa ʻia ʻo "ke aliʻi o ka pale pale", a hoʻohana nui ʻia i nā ʻano he nui, a ke hoʻonui nei nā noi hou.

Hiki ke hoʻohana ʻia ka polyurethane elastomer e hoʻololi i ka metala, ka plastic a me ka ʻōpala maʻamau i kekahi mau māla.

Ke hoʻohālikelike ʻia me nā mea metala, ʻoi aku ka maikaʻi o ka polyurethane elastomer i ka paona māmā, ka haʻahaʻa haʻahaʻa, ka pale ʻana i ka lole, ke kumukūʻai haʻahaʻa haʻahaʻa a me ke kūpaʻa ʻana o ka waika.Ke hoʻohālikelike ʻia me nā plastics, loaʻa iā ia nā pōmaikaʻi o ka paʻakikī kiʻekiʻe a me ke kūpaʻa ʻaʻahu kiʻekiʻe.Ke hoʻohālikelike ʻia me ka pāpaʻi maʻamau, ʻo ka polyurethane elastomer ka maikaʻi o ka pale ʻana i ka ʻaʻahu, ka ʻoki ʻana i ke kūʻē, ke kūʻē ʻana i ka waimaka, ka hiki ke hoʻokiʻekiʻe kiʻekiʻe, ka pale ʻana o ka ozone, a me nā mea ʻē aʻe, a maʻalahi ka hana ʻana, hiki ke hoʻoheheʻe ʻia, ninini ʻia, a loaʻa ka laulā o ka paʻakikī.