inoa huahana:polyurethane

Huahana molecular structure:

Nā waiwai kemika:

ʻO ka Polyurethane (PU), ka inoa piha o ka polyurethane, he pūhui polymer. 1937 na Otto Bayer a me nā hana ʻē aʻe o kēia mea. ʻElua ʻano nui o ka polyurethane, polyester type a me 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.
ʻO ka polyurethane hiki ke hoʻololi i ka laina laina me ka thermoplasticity, ʻoi aku ka maikaʻi o ke kūpaʻa, ke kūpaʻa kemika, ka resilience a me nā waiwai mechanical ma mua o ka PVC foam, me ka liʻiliʻi o ka hoʻololi ʻana. Loaʻa iā ia ka pale wela maikaʻi, ke kani ʻana o ke kani, ke kū ʻana o ka haʻalulu, a me nā waiwai anti-toxic. No laila, hoʻohana ʻia ʻo ia e like me ka hoʻopili ʻana, ka insulation leo a me nā mea kānana. ʻO ka plastic polyurethane paʻa he māmā, hoʻopaʻa leo, ʻoi aku ka wela wela, kūpaʻa kemika, nā waiwai uila maikaʻi, hana maʻalahi, a me ka haʻahaʻa haʻahaʻa o ka wai. Hoʻohana nui ʻia ʻo ia e like me nā mea hana no ke kūkulu ʻana, kaʻa, ʻoihana mokulele, ka wela wela a me ka insulation thermal. Hana ʻia ka polyurethane elastomer ma waena o ka plastic a me ka lāʻau, ka aila kūpaʻa, ka pale ʻana i ka ʻaʻahu, ka haʻahaʻa haʻahaʻa haʻahaʻa, ke kūpaʻa ʻelemakule, ka paʻakikī kiʻekiʻe, ka elasticity. Hoʻohana nui ia i ka ʻoihana kāmaʻa a me ka ʻoihana lapaʻau. Hiki ke hana ʻia ka polyurethane i nā adhesives, coatings, synthetic leather, etc.

Noi:

ʻO nā polyurethanes kekahi o nā mea maʻalahi loa o ka honua i kēia lā. ʻO kā lākou hoʻohana nui ʻana mai ka ʻūhā maʻalahi i loko o nā lako upholstered, i ka ʻōpala paʻa e like me ka insulation i nā paia, nā hale a me nā mea hana i ka polyurethane thermoplastic i hoʻohana ʻia i nā lāʻau lapaʻau a me nā kāmaʻa, i nā uhi, nā mea hoʻopili, nā mea hoʻopaʻa a me nā elastomers i hoʻohana ʻia ma nā papahele a me nā kaʻa kaʻa. Ua hoʻohana nui ʻia ka polyurethanes i nā makahiki he kanakolu i hala iho nei i nā ʻano noi like ʻole ma muli o ko lākou hōʻoluʻolu, nā uku kumukūʻai, ka mālama ʻana i ka ikehu a me ka maikaʻi o ke kaiapuni. He aha kekahi mau mea e makemake nui ai ka polyurethanes? Hāʻawi nui ka polyurethane durability i ka lōʻihi o ke ola o nā huahana he nui. ʻO ka hoʻonui ʻia ʻana o ke ola o ka huahana a me ka mālama ʻana i nā kumuwaiwai he mea koʻikoʻi ka noʻonoʻo kaiapuni e makemake pinepine i ke koho ʻana i nā polyurethanes[19-21]. Hōʻike nā Polyurethanes (PU) i kahi papa koʻikoʻi o nā polymers thermoplastic a me nā thermoset no ka mea hiki ke hoʻopili ʻia ko lākou mau mea mechanical, thermal, a me nā mea kemika e ka hopena o nā polyols a me nā poly-isocyanates.