polyurethane thermoplastic

ʻO ka Thermoplastic Polyurethane (TPU) kahi elastomer thermoplastic hana kiʻekiʻe me nā waiwai pālua kū hoʻokahi o ka elasticity rubber a me ka hiki ke hana plastic. Hoʻomohala mua ʻia i ka makahiki 1937, ua lilo ʻo TPU i hoʻokahi o nā mea polymer ulu wikiwiki loa a ʻoi loa i nā kahua ʻoihana hou. ʻAʻole e like me ka polyurethane thermoset maʻamau ʻaʻole hiki ke hoʻoheheʻe hou ʻia ma hope o ka hoʻōla ʻana, hōʻike ʻo TPU i ka plasticity thermal reversible: palupalu ia a lilo i moldable i ka wā e wela ai, a paʻakikī i loko o kahi kūlana paʻa paʻa i ka wā e hoʻomaʻalili ʻia ai, e hiki ai ke hana hou a me ka hana hou ʻana me ka ʻole o ka nalowale nui o nā waiwai kūkulu a me nā mechanical. Ma ke ʻano kemika, ʻo TPU kahi copolymer poloka segmented i synthesized ma o ka hopena polyaddition o diisocyanates, nā polyols kaulahao lōʻihi (polyether a polyester paha), a me nā mea hoʻolōʻihi kaulahao mole liʻiliʻi. ʻO kona ʻano molekala he mau ʻāpana paʻakikī a me nā ʻāpana palupalu, e hāʻawi ana iā TPU me nā pono hana piha a hiki ke hoʻololi ʻia e hoʻokaʻawale iā ia mai nā elastomers ʻē aʻe.

ʻO ka hana kūikawā o TPU mai kona ʻano hoʻokaʻawale microphase i hoʻokumu ʻia e nā ʻāpana paʻakikī a palupalu. ʻO nā ʻāpana paʻakikī, i haku ʻia me nā hui urethane, e hana i nā kiko cross-linking kino ma o ka hoʻopili hydrogen intermolecular, e hāʻawi ana iā TPU me ka ikaika tensile kiʻekiʻe, rigidity, wear resistance a me ke kūpaʻa wela. ʻO nā ʻāpana palupalu, i hana nui ʻia me nā kaulahao lōʻihi polyether a polyester paha, e hāʻawi i ka mea me ka maʻalahi maikaʻi loa, elasticity, ke kūpaʻa haʻahaʻa haʻahaʻa a me ka paʻakikī. Hiki ke hoʻololi maʻalahi ʻia ka lakio o nā ʻāpana paʻakikī a palupalu i ka wā o ka hana ʻana, e ʻae ana i nā mea hana e hoʻopilikino i nā huahana TPU me nā paʻakikī like ʻole, elasticity a me nā waiwai mechanical e hoʻololi i nā koi ʻoihana like ʻole. Ma muli o nā ʻano ʻāpana palupalu, ua māhele nui ʻia ka TPU kalepa i ka polyester TPU, polyether TPU a me ka TPU i hui pū ʻia, kēlā me kēia me nā hiʻohiʻona noi i kuhikuhi ʻia.

ʻO ka Elasticity maikaʻi loa a me nā waiwai mīkini: Hōʻike ʻo TPU i ke kūpaʻa kiʻekiʻe, ka ikaika tensile a me ka haehae koʻikoʻi, a me ke kūpaʻa ikaika o ka compression. Hiki iā ia ke kū i ke kūlou pinepine ʻana a me ka hoʻolōʻihi ʻana me ka ʻole o ka deformation mau loa, ʻoi aku ka maikaʻi ma mua o ka rubber maʻamau a me nā mea plastic. – Ke Kūʻē ʻana i ka Wear a me ke Scratch: Me kekahi o nā kūpaʻa ʻaʻahu maikaʻi loa i waena o nā elastomers maʻamau, hoʻohana nui ʻia ʻo TPU i nā ʻāpana pale ʻaʻahu e pono ai ka lawelawe lōʻihi. – Paʻa Kemika Nui: Hōʻike ia i ke kūpaʻa ikaika i ka ʻaila, ka wai, ka waikawa dilute, ka alkali dilute a me ka hapa nui o nā solvents organik, e mālama ana i ka hana paʻa i nā wahi kemika paʻakikī. – Hoʻololi Kaiapuni maikaʻi loa: Loaʻa i ka Polyether TPU ke kūpaʻa hydrolysis koʻikoʻi a me ka paʻakikī haʻahaʻa haʻahaʻa, ʻoiai ʻo ka polyester TPU e hōʻike ana i ka pale ʻaila maikaʻi a me ke kūpaʻa mechanical. Loaʻa i nā mea TPU āpau ke kūpaʻa maikaʻi i ka wā, e kūʻē ana i ka ʻelemakule i hoʻokumu ʻia e nā kukuna ultraviolet a me nā loli mahana. – Kaʻina Hana Maikaʻi a me ka Recyclability: Kākoʻo ia i nā ʻenehana hana thermoplastic kuʻuna me ka hoʻoheheʻe injection, extrusion, blow molding a me ka calendering. Hiki ke hoʻoheheʻe ʻia a hana hou ʻia nā mea TPU ʻōpala, e kūlike me nā manaʻo hana ʻōmaʻomaʻo a hoʻomau.

Polyester TPU: Hōʻike ʻia e ka ikaika mechanical kiʻekiʻe, ke kūpaʻa aila maikaʻi, ke kūpaʻa ʻana i ka ʻaʻahu a me ke kūpaʻa ʻana i ka wā ʻelemakule. Hoʻohana nui ʻia ia i nā mea pono hana, nā mea kāmaʻa, nā ʻāpana sila a me nā huahana elastic paʻa. – Polyether TPU: Hōʻike i ke kūpaʻa hydrolysis maikaʻi loa, ka maʻalahi o ka mahana haʻahaʻa, nā waiwai antibacterial a me ka mildew-proof, a me ka haʻahaʻa haʻahaʻa. He kūpono ia no nā lako wai, nā lako lapaʻau, nā pipeline maʻalahi a me nā huahana waho. – TPU Hana Kūikawā: Me ka TPU flame-retardant, TPU conductive, TPU kūpaʻa wela kiʻekiʻe a me ka TPU bio-based. I nā makahiki i hala iho nei, ua ulu wikiwiki ka TPU bio-based i hana ʻia mai nā mea maka hou, e lilo i mea hoʻomau i ka TPU fossil-based kuʻuna.

Mahalo i kāna hana hiki ke hoʻopilikino ʻia a me nā pono piha, ua komo ʻo TPU i nā ʻoihana like ʻole. I ka ʻoihana waiwai kūʻai, hoʻohana ʻia ia i nā kapuaʻi kāmaʻa haʻuki, nā hihia pale, nā kāʻei elastic a me nā waiwai haʻuki. I ka hana ʻoihana, lawelawe ia ma ke ʻano he mau kāʻei conveyor pale ʻaʻahu, nā hose hydraulic, nā gasket sila a me nā ʻāpana damping mechanical. I ka ʻoihana kaʻa, hoʻopili ʻia ʻo TPU i nā ʻāpana o loko o ka kaʻa, nā ʻāpana pale wai a me nā mea hoʻopūhoihoi, a me nā uhi pale o waho. Eia kekahi, hoʻohana nui ʻia ia i nā lako lapaʻau, nā mea pono uila, nā mea aerospace a me nā ʻoihana ikehu hou.

Me ka holomua o nā kulekele palekana kaiapuni ʻōmaʻomaʻo a me ka hoʻonui ʻana i nā ʻoihana, ke neʻe nei ka ʻoihana TPU i ka hana kiʻekiʻe, ka hana a me ke kūpaʻa. Ua lilo ka noiʻi a me ka hoʻohana ʻana i nā TPU bio-based, nā TPU degradable a me nā ʻenehana hana haʻahaʻa-kalapona i mau kuhikuhi nui. I kēia manawa, ua hoʻomohala mau ʻia ka TPU i hoʻololi ʻia me ka pale ahi kiʻekiʻe, ke kūpaʻa wela kiʻekiʻe a me ka paʻakikī wela haʻahaʻa loa e hoʻokō i nā koi koʻikoʻi o nā kahua hana kiʻekiʻe e like me nā kaʻa ikehu hou a me ka aerospace.