ʻO ka mea i kapa ʻiapolyurethaneʻO ia ka pōkole o ka polyurethane, i hana ʻia e ka hopena o nā polyisocyanates a me nā polyols, a loaʻa i nā pūʻulu amino ester (- NH-CO-O -) ma ke kaulahao molekala.I loko o nā resins polyurethane synthesized maoli, ma kahi o ka hui amino ester, aia kekahi mau pūʻulu e like me ka urea a me ka biuret.ʻO nā polyols no nā molekole kaulahao lōʻihi me nā pūʻulu hydroxyl ma ka hopena, i kapa ʻia ʻo "nā ʻāpana kaulahao palupalu", aʻo nā polyisocyanates i kapa ʻia ʻo "nā ʻāpana kaulahao paʻakikī".
Ma waena o nā resins polyurethane i hana ʻia e nā ʻāpana kaulahao palupalu a paʻakikī, he hapa liʻiliʻi wale nō nā esters amino acid, no laila ʻaʻole kūpono ke kapa iā lākou he polyurethane.Ma ke ʻano ākea, ʻo ka polyurethane kahi mea hoʻohui o isocyanate.
Hoʻopili nā ʻano isocyanates like ʻole me nā pūhui polyhydroxy e hana i nā ʻano hana like ʻole o ka polyurethane, a laila e loaʻa ai nā mea polymer me nā waiwai like ʻole, e like me ka plastics, rubber, coatings, fibers, adhesives, etc. Polyurethane rubber
ʻO ka pulupulu polyurethane no kahi ʻano lāʻau kūikawā, i hana ʻia e ka hana ʻana i ka polyether a i ʻole polyester me ka isocyanate.Nui nā ʻano like ʻole ma muli o nā ʻano like ʻole o nā mea maka, nā kūlana pane, a me nā ʻano crosslinking.Mai kahi hiʻohiʻona hoʻolālā kemika, aia nā ʻano polyester a me nā polyether, a mai kahi hiʻohiʻona kaʻina hana, ʻekolu ʻano: ʻano hui ʻana, ʻano hoʻolei, a me ke ʻano thermoplastic.
Hoʻopili pinepine ʻia ka lāʻau polyurethane synthesized e ka hana ʻana i ka polyester linear a i ʻole polyether me ka diisocyanate e hana i kahi prepolymer kaumaha haʻahaʻa, a laila e hoʻopili ʻia i ka hopena hoʻonui kaulahao e hana i kahi polymer kaumaha molekala kiʻekiʻe.A laila, hoʻohui ʻia nā mea hana crosslinking kūpono a hoʻomehana ʻia e hoʻōla iā ia, e lilo ana i ka vulcanized rubber.Kapa ʻia kēia ʻano hana he prepolymerization a i ʻole ʻelua ʻano hana.
Hiki nō hoʻi ke hoʻohana i kahi ʻano ʻanuʻu hoʻokahi - hoʻohui pololei i ka polyester linear a i ʻole polyether me nā diisocyanates, nā mea hoʻonui kaulahao, a me nā mea hana crosslinking e hoʻomaka i kahi pane a hoʻoulu i ka polyurethane rubber.
ʻO ka A-segment i nā molekala TPU e maʻalahi ka hoʻololi ʻana i nā kaulahao macromolecular, e hāʻawi ana i ka rubber polyurethane me ka elasticity maikaʻi, e hōʻemi ana i ka wahi palupalu a me ka pae hoʻololi lua o ka polymer, a e hōʻemi i kona paʻakikī a me ka ikaika mechanical.Na ka ʻāpana B e hoʻopaʻa i ka hoʻololi ʻana o nā kaulahao macromolecular, e hoʻonui ai i ka wahi palupalu a me ka helu hoʻololi lua o ka polymer, e hoʻonui ai i ka paʻakikī a me ka ikaika mechanical, a me ka emi ʻana o ka elasticity.Ma ka hoʻololi ʻana i ka ratio molar ma waena o A a me B, hiki ke hana ʻia nā TPU me nā ʻano mechanical like ʻole.ʻAʻole pono e noʻonoʻo ke ʻano hoʻohui kea o TPU i ka hoʻopili kea mua wale nō, akā, ʻo ka hoʻopili ʻana i ke keʻa lua i hana ʻia e nā paʻa hydrogen ma waena o nā mole.ʻOkoʻa ka paʻa hoʻopaʻa keʻa mua o ka polyurethane mai ka hana vulcanization o ka hydroxyl rubber.ʻO kāna pūʻulu amino ester, pūʻulu biuret, hui urea formate a me nā hui hana ʻē aʻe i hoʻonohonoho ʻia i loko o kahi ʻāpana kaulahao paʻa maʻamau a hoʻokaʻawale ʻia, e hopena i kahi hoʻolālā pūnaewele maʻamau o ka lāʻau, nona ke kūpaʻa maikaʻi a me nā waiwai maikaʻi ʻē aʻe.ʻO ka lua, ma muli o ka loaʻa ʻana o nā pūʻulu hana like ʻole e like me ka urea a i ʻole nā hui carbamate i loko o ka polyurethane rubber, he ikaika kiʻekiʻe nā paʻa hydrogen i hana ʻia ma waena o nā kaulahao mole, a ʻo nā paʻa crosslinking lua i hoʻokumu ʻia e nā paʻa hydrogen he hopena koʻikoʻi i nā waiwai o pulupulu poliuretana.Hiki i ke kaula lua ke loa'a nā hi'ohi'ona o nā elastomers thermosetting ma kekahi lima, a ma ka lima 'ē a'e, 'a'ole i ho'opili maoli 'ia kēia ku'i ke'a, e lilo ana ia i mea ho'opili kea.ʻO ke kūlana hoʻohui keʻa e pili ana i ka mahana.Ke piʻi aʻe ka mahana, nāwaliwali a nalowale kēia hoʻopili kea.Loaʻa i ka polymer kekahi wai a hiki ke hoʻopili ʻia i ka hana thermoplastic.Ke emi iho ka mahana, e ho'ōla lohi a puka hou kēia loulou.ʻO ka hoʻohui ʻana i kahi mea hoʻopiha liʻiliʻi e hoʻonui i ka mamao ma waena o nā molekala, hoʻonāwaliwali i ka hiki ke hana i nā paʻa hydrogen ma waena o nā molekala, a alakaʻi i ka emi ʻana o ka ikaika.Ua hōʻike ʻia ka noiʻi ʻo ke ʻano o ka paʻa ʻana o nā pūʻulu hana like ʻole i ka polyurethane rubber mai kiʻekiʻe a haʻahaʻa: ester, ether, urea, carbamate, a me biuret.I ka wā kahiko o ka polyurethane rubber, ʻo ka hana mua ka haki ʻana i nā kaula hoʻopaʻa keʻa ma waena o ka biuret a me ka urea, a ukali ʻia e ka haki ʻana o nā kaula carbamate a me ka urea, ʻo ia hoʻi, ke kaulahao nui.
01 Hoomaemae
ʻO nā elastomers polyurethane, e like me nā mea polymer he nui, e palupalu i nā wela kiʻekiʻe a me ka hoʻololi ʻana mai kahi kūlana elastic i kahi kūlana kahe viscous, e hopena i ka emi wikiwiki o ka ikaika mechanical.Mai kahi hiʻohiʻona kemika, hilinaʻi nui ka mahana palupalu o ka elasticity i nā mea e like me kona haku mele, paona molekala pili, a me ka hoʻopili ʻana.
ʻO ka mea maʻamau, hoʻonui i ka paona molekala pili, hoʻonui i ka rigidity o ka ʻāpana paʻakikī (e like me ka hoʻokomo ʻana i ke apo benzene i loko o ka mole) a me ka ʻike o ka ʻāpana paʻakikī, a me ka hoʻonui ʻana i ka density crosslinking he mea pono no ka hoʻonui ʻana i ka mahana palupalu.No nā elastomers thermoplastic, ʻoi aku ka laina o ka molecular structure, a ke piʻi aʻe ka mahana palupalu o ka elastomer ke hoʻonui ʻia ka paona molekala pili.
No nā elastomers polyurethane pili kea, ʻoi aku ka nui o ka hopena o ka hoʻopili ʻana ma mua o ke kaumaha molekala pili.No laila, i ka hana ʻana i nā elastomers, hoʻonui i ka hana o nā isocyanates a i ʻole polyols hiki ke hana i kahi ʻōnaehana hoʻopaʻa hoʻopaʻa kemika i loko o kekahi o nā molekole elastic, a i ʻole ka hoʻohana ʻana i ka nui o ka isocyanate ratios e hana ai i ka isocyanate cross-linking structure i loko o ke kino elastic. he ala ikaika e hoʻomaikaʻi ai i ka pale wela, ka pale pale, a me ka ikaika mechanical o ka elastomer.
Ke hoʻohana ʻia ʻo PPDI (p-phenyldiisocyanate) e like me ka mea maka, ma muli o ka hoʻopili pololei ʻana o nā hui isocyanate ʻelua i ke apo benzene, ʻo ka ʻāpana paʻakikī i hana ʻia he ʻoi aku ka nui o ke apo benzene, kahi e hoʻomaikaʻi ai i ka rigidity o ka māhele paʻakikī a pēlā e hoʻonui ai. ka pale wela o ka elastomer.
Mai kahi hiʻohiʻona kino, pili ka mahana palupalu o nā elastomers i ke kiʻekiʻe o ka hoʻokaʻawale microphase.Wahi a nā hōʻike, haʻahaʻa loa ka mahana palupalu o nā elastomers ʻaʻole e hoʻokaʻawale i ka microphase, me kahi mahana hana o 70 ℃ wale nō, aʻo nā elastomers e hoʻokaʻawale i ka microphase hiki ke hiki i 130-150 ℃.No laila, ʻo ka hoʻonui ʻana i ke kiʻekiʻe o ka hoʻokaʻawale ʻana o ka microphase i nā elastomers kekahi o nā ala kūpono e hoʻomaikaʻi ai i ko lākou kūpaʻa wela.
Hiki ke hoʻomaikaʻi ʻia ke kiʻekiʻe o ka hoʻokaʻawale microphase o nā elastomers ma o ka hoʻololi ʻana i ka hoʻoili ʻana o ke kaumaha molekala pili o nā ʻāpana kaulahao a me ka ʻike o nā ʻāpana kaulahao paʻa, a laila e hoʻonui ai i ko lākou kūpaʻa wela.Manaʻo ka hapa nui o nā mea noiʻi ʻo ke kumu o ka hoʻokaʻawale ʻana o ka microphase i ka polyurethane ʻo ka thermodynamic incompatibility ma waena o nā ʻāpana palupalu a paʻakikī.ʻO ke ʻano o ka mea hoʻonui kaulahao, ka ʻāpana paʻakikī a me kāna ʻike, ke ʻano ʻāpana palupalu, a me ka hoʻopaʻa ʻana i ka hydrogen he hopena koʻikoʻi ia.
Hoʻohālikelike ʻia me nā mea hoʻonui kaulahao diol, nā mea hoʻonui kaulahao diamine e like me MOCA (3,3-dichloro-4,4-diaminodiphenylmethane) a me DCB (3,3-dichloro-biphenylenediamine) e hoʻokumu i nā pūʻulu amino ester polar i nā elastomers, a ʻoi aku ka nui o nā paʻa hydrogen hiki ke e hana ʻia ma waena o nā ʻāpana paʻakikī, e hoʻonui i ka pilina ma waena o nā ʻāpana paʻakikī a me ka hoʻomaikaʻi ʻana i ke degere o ka hoʻokaʻawale microphase i nā elastomers;ʻO nā mea hoʻonui kaulahao symmetric aromatic e like me p, p-dihydroquinone, a me ka hydroquinone he mea pono no ka hoʻomaʻamaʻa ʻana a me ka paʻa paʻa ʻana o nā ʻāpana paʻakikī, e hoʻomaikaʻi ai i ka hoʻokaʻawale microphase o nā huahana.
ʻO nā ʻāpana amino ester i hoʻokumu ʻia e aliphatic isocyanates he kūpono maikaʻi me nā ʻāpana palupalu, e hopena i nā ʻāpana paʻakikī e hoʻoheheʻe ʻia i nā ʻāpana palupalu, e hōʻemi ana i ke kiʻekiʻe o ka hoʻokaʻawale microphase.ʻO nā ʻāpana amino ester i hoʻokumu ʻia e nā isocyanates aromatic he maikaʻi ʻole me nā ʻāpana palupalu, ʻoiai ke kiʻekiʻe o ka hoʻokaʻawale microphase.ʻO ka polyolefin polyurethane kahi ʻano hoʻokaʻawale microphase kokoke loa ma muli o ka mea ʻaʻole i hoʻokumu ʻia ka ʻāpana palupalu i nā paʻa hydrogen a hiki i nā paʻa hydrogen ke kū wale i ka ʻāpana paʻakikī.
He mea koʻikoʻi nō hoʻi ka hopena o ka hoʻopaʻa ʻana o ka hydrogen ma ka wahi palupalu o nā elastomers.ʻOiai hiki i nā polyethers a me nā carbonyl i ka māhele palupalu ke hana i ka nui o nā paʻa hydrogen me NH i ka ʻāpana paʻakikī, hoʻonui ia i ka wela palupalu o nā elastomers.Ua hōʻoia ʻia e paʻa mau nā paʻa hydrogen 40% ma 200 ℃.
02 Hoʻoheheʻe wela
Loaʻa nā pūʻulu Amino ester i kēia decomposition i nā wela kiʻekiʻe:
- RNHCOOR – RNC0 HO-R
- RNHCOOR – RNH2 CO2 ʻaneʻi
- RNHCOOR – RNHR CO2 ʻaneʻi
ʻEkolu mau ʻano nui o ka hoʻoheheʻe wela o nā mea i hoʻokumu ʻia i ka polyurethane:
① Hoʻokumu i nā isocyanates kumu a me nā polyols;
② α— Ua haki ka paʻa oxygen ma ke kumu CH2 a hui pū me hoʻokahi paʻa hydrogen ma ka CH2 lua e hana i nā waikawa amino a me nā alkenes.Hoʻoheheʻe ʻia nā amino acids i hoʻokahi amine a me carbon dioxide:
③ Puka 1 amine lua a me carbon dioxide.
ʻO ka hoʻoheheʻe wela o ka hale karbamate:
Aryl NHCO Aryl,~120 ℃;
N-alkyl-NHCO-aryl,~180 ℃;
Aryl NHCO n-alkyl,~200 ℃;
N-alkyl-NHCO-n-alkyl,~250 ℃.
ʻO ke kūpaʻa wela o nā esters amino acid e pili ana i nā ʻano mea hoʻomaka e like me isocyanates a me polyols.ʻOi aku ka kiʻekiʻe o nā isocyanates aliphatic ma mua o nā isocyanates aromatic, ʻoiai ʻoi aku ka kiʻekiʻe o nā ʻona momona ma mua o nā ʻona ʻala.Eia nō naʻe, hōʻike ka moʻolelo ʻo ka mahana decomposition wela o nā esters amino acid aliphatic ma waena o 160-180 ℃, a ʻo nā esters amino acid aromatic ma waena o 180-200 ℃, ʻaʻole i kūlike me ka ʻikepili ma luna.Pili paha ke kumu i ke ʻano hoʻāʻo.
ʻO ka ʻoiaʻiʻo, ʻoi aku ka maikaʻi o ka pale ʻana i ka wela ma mua o ka MDI a me TDI ʻo aliphatic CHDI (1,4-cyclohexane diisocyanate) a me HDI (hexamethylene diisocyanate).ʻOi aku ka nui o ka trans CHDI me ka hoʻolālā symmetrical i ʻike ʻia ʻo ia ka isocyanate pale wela loa.ʻO nā elastomers polyurethane i hoʻomākaukau ʻia mai ia mea he maikaʻi ka hana ʻana, maikaʻi ke kūpaʻa hydrolysis, kiʻekiʻe hoʻoluʻu wela, haʻahaʻa aniani hoʻololi wela, haʻahaʻa thermal hysteresis, a me ke kūpaʻa UV kiʻekiʻe.
Ma waho aʻe o ka pūʻulu amino ester, loaʻa nā polyurethane elastomers i nā hui hana ʻē aʻe e like me ka urea formate, biuret, urea, a me nā mea ʻē aʻe.
NHCONCOO – (aliphatic urea formate), 85-105 ℃;
- NHCONCOO – (ʻono urea formate), ma kahi mahana wela o 1-120 ℃;
- NHCONCONH – (aliphatic biuret), ma kahi mahana mai 10 ° C a 110 ° C;
NHCONCONH – (biuret aromatic), 115-125 ℃;
NHCONH – (aliphatic urea), 140-180 ℃;
- NHCONH – (urea ʻala), 160-200 ℃;
Isocyanurate apo>270 ℃.
ʻOi aku ka haʻahaʻa o ka mahana decomposition wela o ka biuret a me ka urea based formate ma mua o ka aminoformate a me ka urea, ʻoiai ʻo isocyanurate ka ʻoi aku ka maikaʻi o ka wela.I ka hana ʻana i nā elastomers, hiki i ka nui o nā isocyanates ke hana hou aku me ka aminoformate i hana ʻia a me ka urea e hana i ka urea based formate a me ka biuret cross-linked structures.ʻOiai hiki iā lākou ke hoʻomaikaʻi i nā waiwai mechanical o nā elastomers, ʻaʻole paʻa loa lākou i ka wela.
No ka ho'ēmiʻana i nā pūʻulu paʻaʻole e like me ka biuret a me ka urea formate i nā elastomers, pono e noʻonoʻo i kā lākou lākiō waiwai a me ka hana hana.Pono e hoʻohana i ka nui o ka isocyanate ratios, a me nā ʻano hana ʻē aʻe e like me ka hiki ke hana mua i nā apo isocyanate hapa i loko o nā mea maka (ka nui o nā isocyanates, polyols, a me nā mea hoʻonui kaulahao), a laila hoʻokomo iā lākou i loko o ka elastomer e like me nā kaʻina hana maʻamau.Ua lilo kēia i mea hoʻohana maʻamau no ka hana ʻana i nā elastomers polyurethane pale wela a me ka lapalapa ahi.
03 Hydrolysis a me ka thermal oxidation
Hiki i ka polyurethane elastomers ke hoʻoheheʻe wela i ko lākou mau ʻāpana paʻakikī a me nā hoʻololi kemika pili i ko lākou mau ʻāpana palupalu i nā wela kiʻekiʻe.ʻO nā elastomers polyester he kūʻokoʻa wai maikaʻi a ʻoi aku ka koʻikoʻi o ka hydrolyze i nā wela kiʻekiʻe.Hiki i ke ola lawelawe o polyester/TDI/diamine ke hiki i 4-5 mau mahina ma 50 ℃, ʻelua pule wale nō ma 70 ℃, a he mau lā wale nō ma luna o 100 ℃.Hiki ke hoʻoheheʻe ʻia nā mea hoʻopaʻa Ester i loko o nā ʻakika a me nā ʻawaʻawa like ke ʻike ʻia i ka wai wela a me ka mahu, a ʻo ka urea a me nā pūʻulu amino ester i loko o nā elastomers hiki ke hana i nā hopena hydrolysis:
RCOOR H20- → RCOOH HOR
ʻO ka waiʻona Ester
Hoʻokahi RNHCONHR hoʻokahi H20- → RXHCOOH H2NR -
Ureamide
Hoʻokahi RNHCOOR-H20- → RNCOOH HOR -
Amino formate ester Amino formate alcohol
ʻO nā elastomers i hoʻokumu ʻia i ka polyether, ʻaʻole maikaʻi ke kūpaʻa o ka wela wela, a me nā elastomers etera α- Ua maʻalahi ka hydrogen ma ke kalapona kalapona, a lilo i hydrogen peroxide.Ma hope o ka hoʻoheheʻe hou ʻana a me ka hoʻokaʻawale ʻana, hoʻohua ia i nā radical oxide a me nā radical hydroxyl, a hiki ke hoʻoheheʻe i nā formates a i ʻole aldehydes.
He liʻiliʻi ka hopena o nā polyesters ʻokoʻa i ke kūpaʻa wela o nā elastomers, aʻo nā polyesters ʻē aʻe kekahi mana.Hoʻohālikelike ʻia me TDI-MOCA-PTMEG, ʻo TDI-MOCA-PTMEG he 44% a me 60% ka nui o ka paʻa ʻana o ka ikaika i ka wā o ka makahiki ma 121 ℃ no 7 mau lā, me ka ʻoi aku ka maikaʻi ma mua o ka mua.ʻO ke kumu paha he mau kaulahao lālā o ka PPG, ʻaʻole kūpono i ka hoʻonohonoho maʻamau o nā molela elastic a hoʻemi i ka pale wela o ke kino elastic.ʻO ke kauoha kūpaʻa wela o nā polyethers: PTMEG>PEG>PPG.
ʻO nā pūʻulu hana ʻē aʻe i loko o nā elastomers polyurethane, e like me ka urea a me ka carbamate, e loaʻa pū kekahi i ka hopena a me ka hydrolysis.Eia naʻe, ʻo ka hui ether ka mea maʻalahi loa i ka oxidized, aʻo ka hui ester ka mea maʻalahi loa i ka hydrolyzed.ʻO ke kauoha o kā lākou antioxidant a me ka hydrolysis resistance:
Ka hana antioxidant: esters>urea>carbamate>ether;
ʻO ke kūpaʻa hydrolysis: ester
No ka hoʻomaikaʻi ʻana i ke kūpaʻa ʻana o ka polyether polyurethane a me ke kūpaʻa hydrolysis o ka polyester polyurethane, hoʻohui pū ʻia nā mea hoʻohui, e like me ka hoʻohui ʻana i ka 1% phenolic antioxidant Irganox1010 i ka PTMEG polyether elastomer.Hiki ke hoʻonui ʻia ka ikaika tensile o kēia elastomer e 3-5 mau manawa i hoʻohālikelike ʻia me ka ʻole o nā antioxidants (nā hopena hōʻike ma hope o ka ʻelemakule ma 1500C no 168 mau hola).Akā ʻaʻole kēlā me kēia antioxidant ka hopena i ka polyurethane elastomers, ʻo ka phenolic 1rganox 1010 a me TopanOl051 wale nō (phenolic antioxidant, hoʻoneʻe i ka amine light stabilizer, benzotriazole complex) he hopena koʻikoʻi, a ʻo ka mea mua ka mea maikaʻi loa, malia paha no ka mea ʻoi aku ka maikaʻi o nā antioxidants phenolic me nā elastomers.Eia nō naʻe, ma muli o ke koʻikoʻi o nā pūʻulu phenolic hydroxyl i ke ʻano stabilization o nā antioxidants phenolic, i mea e pale ai i ka hopena a me ka "haʻole" o kēia pūʻulu phenolic hydroxyl me nā hui isocyanate i loko o ka ʻōnaehana, ʻaʻole pono ka ratio o isocyanates i polyols. nui loa, a pono e hoʻohui ʻia nā antioxidants i nā prepolymers a me nā mea hoʻonui kaulahao.Inā hoʻohui ʻia i ka wā o ka hana ʻana o nā prepolymers, e hoʻopilikia nui ia i ka hopena stabilization.
ʻO nā mea hoʻohui i hoʻohana ʻia e pale i ka hydrolysis o nā polyester polyurethane elastomers ka nui o nā pūhui carbodiimide, e hoʻopili me nā waikawa carboxylic i hana ʻia e ka ester hydrolysis i loko o nā molekele elastomer polyurethane e hana i nā derivatives acyl urea, e pale ana i ka hydrolysis hou.ʻO ka hoʻohui ʻana o ka carbodiimide ma kahi hapa nui o 2% a 5% hiki ke hoʻonui i ka paʻa wai o ka polyurethane e 2-4 mau manawa.Eia kekahi, ʻo tert butyl catechol, hexamethylenetetramine, azodicarbonamide, a me nā mea ʻē aʻe kekahi mau hopena anti hydrolysis.
04 Nā hiʻohiʻona hana nui
ʻO ka polyurethane elastomers he mau ʻāpana copolymers maʻamau, me nā kaulahao molekala i haku ʻia me nā ʻāpana maʻalahi me ka mahana hoʻololi aniani i haʻahaʻa ma mua o ka mahana o ka lumi a me nā ʻāpana paʻa me kahi mahana hoʻololi aniani ʻoi aʻe ma mua o ka mahana o ka lumi.Ma waena o lākou, hana nā polyols oligomeric i nā ʻāpana maʻalahi, ʻoiai nā diisocyanates a me nā mea hoʻonui kaulahao liʻiliʻi e hana i nā ʻāpana paʻa.ʻO ke ʻano i hoʻopili ʻia o nā ʻāpana kaulahao maʻalahi a paʻa e hoʻoholo i kā lākou hana kūʻokoʻa:
(1) Aia ma waena o Shaoer A20-A90 ka laulā paʻakikī o ka pāpaʻi maʻamau, aʻo ka laulā paʻakikī e pili ana iā Shaoer A95 Shaoer D100.Hiki i nā elastomers polyurethane ke piʻi i kahi haʻahaʻa e like me Shaoer A10 a me ke kiʻekiʻe e like me Shaoer D85, me ka ʻole o ke kōkua hoʻopihapiha;
(2) Hiki ke mālama ʻia ka ikaika kiʻekiʻe a me ka elasticity i loko o kahi ākea o ka paʻakikī;
(3) Kūleʻa maikaʻi loa, 2-10 mau manawa o ka lāʻau kūlohelohe;
(4) Kūleʻa maikaʻi loa i ka wai, ka ʻaila, a me nā kemika;
(5) Ke kū'ē i ka hopena kiʻekiʻe, ke kūpaʻa luhi, a me ke kūpaʻa haʻalulu, kūpono no nā noi kulou kiʻekiʻe;
(6) Ke kūpaʻa haʻahaʻa haʻahaʻa maikaʻi, me ka brittleness haʻahaʻa haʻahaʻa ma lalo o -30 ℃ a i ʻole -70 ℃;
(7) Loaʻa iā ia ka hana insulation maikaʻi loa, a ma muli o kona haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, ʻoi aku ka maikaʻi o ka hopena insulation i hoʻohālikelike ʻia me ka lāʻau a me ka plastic;
(8) Biocompatibility maikaʻi a me nā waiwai anticoagulant;
(9) Hoʻopili uila maikaʻi loa, pale ʻana i ka mold, a me ka paʻa o UV.
Hiki ke hoʻokumu ʻia nā elastomers polyurethane me ka hoʻohana ʻana i nā kaʻina hana like me ka lāʻau maʻamau, e like me ka plasticization, ka hui ʻana, a me ka vulcanization.Hiki iā lākou ke hoʻoheheʻe ʻia ma ke ʻano o ka ʻōpala wai ma ka ninini ʻana, ka hoʻoheheʻe centrifugal, a i ʻole ka hoʻoulu ʻana.Hiki ke hana ʻia i loko o nā mea granular a hana ʻia me ka hoʻohana ʻana i ka injection, extrusion, rolling, blow molding, a me nā kaʻina hana ʻē aʻe.Ma kēia ala, ʻaʻole ia e hoʻomaikaʻi wale i ka hana pono, akā hoʻomaikaʻi pū i ka pololei dimensional a me ke ʻano o ka huahana.
Ka manawa hoʻouna: Dec-05-2023