Wehewehe piha o na mea TPU

I ka makahiki 1958, ua hoʻopaʻa inoa ʻo Goodrich Chemical Company (i kapa hou ʻia ʻo Lubrizol) i ka inoa TPU Estane no ka manawa mua. I loko o nā makahiki he 40 i hala iho nei, ua ʻoi aku ma mua o 20 mau inoa inoa a puni ka honua, a ua loaʻa i kēlā me kēia brand nā ʻano huahana. I kēia manawa, ʻo nā mea hana waiwai TPU ka nui o BASF, Covestro, Lubrizol, Huntsman Corporation, Wanhua Chemical Group, Shanghai Hengʻan, Ruihua, Xuchuan Chemical, etc.

1 、 Kawai o TPU

Wahi a ka ʻāpana palupalu, hiki ke hoʻokaʻawale ʻia i ke ʻano polyester, polyether type, a me ka butadiene type, i loaʻa i kēlā me kēia pūʻulu ester, hui ether, a i ʻole pūʻulu butene.

Wahi a ka ʻāpana ʻāpana paʻakikī, hiki ke hoʻokaʻawale ʻia i ke ʻano urethane a me ke ʻano urethane urea, i loaʻa i kēlā me kēia mea mai ka ethylene glycol chain extenders a i ʻole diamine chain extenders. Hoʻokaʻawale ʻia ka hoʻohālikelike maʻamau i ke ʻano polyester a me ke ʻano polyether.

E like me ka hele ʻana a i ʻole ka ʻole o ka cross-linking, hiki ke hoʻokaʻawale ʻia i ka thermoplastic maʻemaʻe a me ka semi thermoplastic.

He ʻano laina laina maʻemaʻe ka mua a ʻaʻohe mea hoʻopaʻa keʻa; Loaʻa i ka mea hope kahi liʻiliʻi o nā mea paʻa i hoʻopili ʻia e like me ka Allophanic acid ester.

E like me ka hoʻohana ʻana i nā huahana i hoʻopau ʻia, hiki ke hoʻokaʻawale ʻia i nā ʻāpana profiled (nā ʻano mīkini like ʻole), nā paipu (sheaths, bar profiles), nā kiʻiʻoniʻoni (pepa, nā papa lahilahi), adhesives, coatings, fibers, etc.

2、 Hoʻohui o TPU

No ka polyurethane ka TPU ma ke ʻano o ke ʻano mole. No laila, pehea i hui ʻia ai?

Wahi a nā kaʻina hana synthesis, ua māhele nui ʻia i ka polymerization nui a me ka polymerization solution.

I ka polymerization nui, hiki ke hoʻokaʻawale ʻia i ke ʻano pre polymerization a me ke ʻano hana hoʻokahi e pili ana i ka hele ʻana a i ʻole ka ʻole o ka pane mua.

ʻO ke ʻano prepolymerization e pili ana i ka reacting diisocyanate me nā macromolecular diols no kekahi manawa ma mua o ka hoʻohui ʻana i ka hoʻonui kaulahao e hana i ka TPU;

ʻO ke kaʻina hana hoʻokahi ka hui pū ʻana a me ka pane ʻana i nā diols macromolecular, diisocyanates, a me nā mea hoʻonui kaulahao e hana i ka TPU.

Hoʻopili ka polymerization i ka hoʻoheheʻe mua ʻana i ka diisocyanate i loko o kahi mea hoʻoheheʻe, a laila hoʻohui i nā diols macromolecular e hana no kekahi manawa, a ma hope o ka hoʻohui ʻana i nā mea hoʻonui kaulahao e hana i ka TPU.

Hiki ke hoʻopili ke ʻano o ka ʻāpana palupalu TPU, ke kaumaha molekala, ka ʻāpana paʻakikī a palupalu paha, a me ka mokuʻāina hoʻohui TPU i ka mānoanoa o TPU, me ka mānoanoa ma kahi o 1.10-1.25, a ʻaʻohe ʻokoʻa koʻikoʻi ke hoʻohālikelike ʻia me nā lāʻau a me nā plastics ʻē aʻe.

Ma ka paʻakikī like, ʻoi aku ka haʻahaʻa o ka TPU ʻano polyether ma mua o ka TPU ʻano polyester.

3 、 Ka hana ʻana o TPU

Pono nā ʻāpana TPU i nā kaʻina hana like ʻole e hoʻokumu i ka huahana hope, me ka hoʻohana nui ʻana i nā ʻano hoʻoheheʻe a me nā ʻano hoʻonā no ka hana TPU.

ʻO ka hoʻoheheʻe ʻana he hana maʻamau i hoʻohana ʻia i ka ʻoihana plastik, e like me ka hui ʻana, ka ʻōwili ʻana, ka extrusion, ka puhi ʻana, a me ka hoʻoheheʻe ʻana;

ʻO ka hoʻoponopono hoʻoponopono ke kaʻina hana o ka hoʻomākaukau ʻana i kahi hopena ma o ka hoʻoheheʻe ʻana i nā ʻāpana i loko o ka solvent a i ʻole ka polymerizing pono iā lākou i loko o ka solvent, a laila uhi ʻia, wili, a pēlā aku.

ʻO ka huahana hope loa i hana ʻia mai ka TPU maʻamau, ʻaʻole ia e koi i ka vulcanization crosslinking reaction, hiki ke hoʻopōkole i ke kaʻina hana a me ka hana hou ʻana i nā mea ʻōpala.

4、 Hana o TPU

He modulus kiʻekiʻe ka TPU, ka ikaika kiʻekiʻe, ka elongation kiʻekiʻe a me ka elasticity, ke kūpaʻa maikaʻi loa, ke kūpaʻa ʻaila, ka haʻahaʻa haʻahaʻa haʻahaʻa, a me ke kūpaʻa ʻelemakule.

ʻO ka ikaika tensile kiʻekiʻe, ka elongation kiʻekiʻe, a me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa o ka TPU.

E wehewehe nui ʻo XiaoU i nā waiwai mechanical o TPU mai nā ʻano e like me ka ikaika tensile a me ka elongation, resilience, hardness, etc.

Ka ikaika tensile kiʻekiʻe a me ka elongation kiʻekiʻe

Loaʻa i ka TPU ka ikaika tensile maikaʻi a me ka elongation. Mai ka ʻikepili i ka kiʻi ma lalo nei, hiki iā mākou ke ʻike i ka ikaika tensile a me ka elongation o ka polyether type TPU ʻoi aku ka maikaʻi ma mua o ka polyvinyl chloride plastic a me ka rubber.

Eia hou, hiki i ka TPU ke hoʻokō i nā koi o ka ʻoihana meaʻai me nā mea hoʻohui liʻiliʻi a ʻaʻohe mea hoʻohui i hoʻohui ʻia i ka wā o ka hana ʻana, he mea paʻakikī hoʻi no nā mea ʻē aʻe e like me ka PVC a me ka rubber.

ʻO ke kūpaʻa i ka wela

ʻO ke kūpaʻa o ka TPU e pili ana i ke kiʻekiʻe o ka hoʻihoʻi koke ʻana i kona kūlana mua ma hope o ka hoʻomaha ʻana o ke koʻikoʻi deformation, i hōʻike ʻia e like me ka ikehu hoʻihoʻi, ʻo ia ka lākiō o ka hana retraction deformation i ka hana e pono ai e hana i ka deformation. He hana ia o ka modulus dynamic a me ka friction kūloko o kahi kino elastic a paʻakikī loa i ka wela.

Hoʻemi ka rebound me ka emi ʻana o ka mahana a hiki i kahi mahana, a piʻi hou ka elasticity. ʻO kēia mahana ka mahana crystallization o ka māhele palupalu, i hoʻoholo ʻia e ke ʻano o ka macromolecular diol. He haʻahaʻa ka TPU ʻano polyether ma mua o ka TPU polyester type. Ma nā mahana ma lalo o ka mahana crystallization, lilo ka elastomer i mea paʻakikī a nalowale kona elasticity. No laila, ua like ke kūpale me ka rebound mai ka ʻili o ka metala paʻakikī.

ʻO ka pae paʻakikī ʻo Shore A60-D80

ʻO ka paʻakikī kahi hōʻailona o ka hiki o kahi mea ke pale i ka deformation, ka paʻi ʻana, a me ka ʻoki ʻana.

Hoʻohana pinepine ʻia ka paʻakikī o TPU me ka hoʻohana ʻana i nā mea hōʻike paʻakikī Shore A a me Shore D, me Shore A i hoʻohana ʻia no nā TPU palupalu a me Shore D i hoʻohana ʻia no nā TPU paʻakikī.

Hiki ke hoʻololi i ka paʻakikī o TPU ma ka hoʻoponopono ʻana i ka māhele o nā ʻāpana kaulahao palupalu a paʻakikī. No laila, he laula paʻakikī ko TPU, mai Shore A60-D80, e pili ana i ka paʻakikī o ka lāʻau a me ka plastic, a he elasticity kiʻekiʻe ma ka pae paʻakikī holoʻokoʻa.

Ke loli ka paʻakikī, hiki ke loli kekahi mau waiwai o TPU. No ka laʻana, ʻo ka hoʻonui ʻana i ka paʻakikī o ka TPU e hopena i nā loli hana e like me ka hoʻonui ʻana i ka modulus tensile a me ka ikaika o ka waimaka, ka hoʻonui ʻana i ka rigidity a me ke koʻikoʻi compressive (hiki ke hoʻouka), hoʻemi ʻia ka elongation, hoʻonui ʻia ka nui a me ka hoʻoulu ʻana i ka wela, a me ka hoʻonui ʻana i ke kūpaʻa kūlohelohe.

5 、 Hoʻohana i ka TPU

Ma ke ʻano he elastomer maikaʻi loa, loaʻa i ka TPU kahi ākea o nā kuhikuhi huahana i lalo a hoʻohana nui ʻia i nā mea e pono ai i kēlā me kēia lā, nā mea haʻuki, nā mea pāʻani, nā mea hoʻonaninani, a me nā māla ʻē aʻe.

Nā mea kāmaʻa

Hoʻohana nui ʻia ʻo TPU no nā mea kāmaʻa ma muli o kona elasticity maikaʻi loa a me ke kūpaʻa ʻana. ʻOi aku ka ʻoluʻolu o nā kāmaʻa kāmaʻa i loaʻa i ka TPU ma mua o nā huahana kāmaʻa maʻamau, no laila ua hoʻohana nui ʻia lākou i nā huahana kāmaʻa kiʻekiʻe, ʻoi aku ka nui o nā kāmaʻa haʻuki a me nā kāmaʻa maʻamau.

hose

Ma muli o kona palupalu, ikaika tensile maikaʻi, ikaika hopena, a me ke kū'ē i ke kiʻekiʻe a me ka haʻahaʻa haʻahaʻa, hoʻohana nui ʻia nā hose TPU ma Kina e like me nā hose kinoea a me ka aila no nā mea hana mechanical e like me nā mokulele, nā pahu, nā kaʻa, nā kaʻa kaʻa, a me nā mea hana mīkini.

uwea

Hāʻawi ʻo TPU i ke kūpaʻa waimaka, ke kūpaʻa ʻaʻahu, a me nā hiʻohiʻona kulou, me ke kūpaʻa kiʻekiʻe a me ka haʻahaʻa haʻahaʻa ke kī i ka hana uea. No laila, ma ka mākeke Kina, hoʻohana nā kelepona holomua e like me nā kaula mana a me nā kaula mana i nā TPU no ka pale ʻana i nā mea uhi o nā hoʻolālā uea paʻakikī, a ke ulu nui nei kā lākou noi.

Nā mea lapaʻau

ʻO ka TPU he mea palekana, kūpaʻa a me ke kūlana kiʻekiʻe o ka PVC mea pani, ʻaʻole e loaʻa i ka Phthalate a me nā mea ʻino ʻē aʻe, a e neʻe i ke koko a i ʻole nā ​​wai ʻē aʻe i loko o ka catheter lapaʻau a i ʻole ʻeke lapaʻau e hopena i nā hopena ʻaoʻao. He mea hoʻomohala kūikawā hoʻi ia i ka papa extrusion a me ka TPU papa injection.

kiʻiʻoniʻoni

He kiʻi ʻoniʻoni ʻoniʻoni ʻo TPU i hana ʻia mai ka TPU granular material ma o nā kaʻina hana kūikawā e like me ka ʻōwili, hoʻolei ʻana, puhi, a me ka uhi ʻana. Ma muli o kona ikaika kiʻekiʻe, ʻaʻahu kūʻokoʻa, elasticity maikaʻi, a me ka pale ʻana i ka wā, hoʻohana nui ʻia nā kiʻi ʻoniʻoni TPU i nā ʻoihana, nā mea kāmaʻa, nā lole kūpono, nā kaʻa, kemika, ka uila, ka lāʻau lapaʻau, a me nā ʻano ʻē aʻe.