Full polyurethane kapa polyurethane, Ua collectively hou urethane pūʻulu (NHCOO) macromolecular hui i loaʻa i loko o ka papa kuhikuhiE kaulahao. Ua ua i mai i ke aloha diisocyanate paha polyisocyanate hui me elua a oi hydroxyl polyaddition. ʻO kēia naoh haʻilula: -N = C = O + HO- → -NH-COO-, ma ka hou ana i ka polyurethane macromolecule carbamate, hiki no hoi i pihaʻi me Etera, ester, urea, biuret, allophanate, etc. pūʻulu.
(Cyanate
Description: HOC≡N (N) cyanate HN = C = O (isocyanate) i kekahi (maikaʻi) cyanate a me isocyanate mauʻano. Ua noaʻakika mea i ka läÿau, o elua, i kaawale hamama, akā, kona nā mea kemika i nā 'ano apau loa. Cyanate mea e yiaeaiiacaaeneiie a me ka corrosive ke kinowai. Aia He He ikaikaʻala o aceticʻakika. Nuʻa 1,14. Paila wahi 23,6 ℃. Hōʻike i ikaikaʻakika ma koʻana koko pāʻoihana. He hu wale, eaaei polymerization. Ammonia a me carbon dioxide a ua loaʻa i hydrolysis. I ka hoʻomakaʻia carbamates a me ka waiʻona mai ke kino a Mānoa. (N) isocyanate ROC≡N oluolu polymerization, a me ka susceptible i ka hydrolysis, i loaa i loko o ke gula maikai ano pilikia. Isocyanate RN = C = O 'ole O = C = NRN = C = O, nui kaʻawaʻawa loa ala me ka wai. Cyanate cyanuricʻakika hiki ke hoomakaukau e thermal decomposition. )
Polyurethane huahana hana palupalu, kalaka nui-ʻoʻoleʻa a me kaʻoʻoleʻa hua, elastomers, pena, adhesives, sealants, kemikalaʻili ka penaʻana kēpau, elastomeric olona, hoʻomano hoʻohana ma ka ulia kaʻa manufacturing, Pahu Hau manufacturing, ka halihali, na 'enekinia, e kukulu, lole kamaʻa, kemikala ili, lole, hana, petrochemical, hoʻouku hana, aerospace, 'inikua, mahiai, a he nui nā mahinaʻai.
Ke kaumaha ma muli o kaʻokoʻa maka pono hana, hiki i nāʻano o nā huahana, nui nāʻano o ka polyester a me ka polyether. Polyether polyurethane meaʻano nui polyurethane mea e hoomakaukau ai i ho'ākāka 'ia no ka polyol, he polyurethane polyol i ua hoomakaukauia loa mai polyether polyol a me ka hapa nui o ka e noho ai i loko o ke kahua.
Polyether polyols ma ka hakakino 'ole, he Etera hoopaa cohesive ikehu mea haʻahaʻa, a me ka oluolu i ka ao ka, no laila ia mea he maikaʻi haʻahaʻa-wela polyurethane mea hoomakaukau ia e kona maʻemaʻe hana, maikaʻi hydrolysis ia'ku, eia nae aole i like ka maikai me ka ÿano waiwai o ka polyester polyurethane, akā, alo emi mau mea, a me ka oluolu isocyanate ke keʻena miscible mea hoʻonui, maikaʻi aaioee hana ana.
Polyester polyols ku una haawiia no ma ka dicarboxylicʻakika me ka glycol a me nā polyester polyol ma condensation naoh. Broadly i loaʻa ka ester pae (COO) a me ka kalepona pūʻulu (OCOO) polyol. Polyurethane hua i hoʻomano i hoʻohana. Kahi I Ke hua uaʻano nui hoʻohana no ka lako a me kaa o kekahi mau moena mea,'īpale lako; ʻoʻoleʻa hua'īpale uaʻano nui hoʻohana no ka hale nā mīkini home, neo? aaiiai? pa waterproofingʻehu hua'īpale, paipu'īpale kumuhana, hale Panel, refrigerated ia i kona kalaka a me ke anu pūnaewele'īpale a me nā pono hana; kalaka nui-ʻoʻoleʻa hua hoʻohana i kaʻa mea kani Panel, kōmike hoʻokele huila, a no laila, ma luna o. Ke kuai i kekahiʻano o ka hoakaka no polyurethane hua me ka hui pu ana o kekahi mau kumuhana (elua-ke keʻena premix),ʻano nui no ka (anu hoolaia) kiʻekiʻe resilience hua, kalaka nui-ʻoʻoleʻa hua, o Anederea, a me kaʻawa paakiki hua ea.
(Diethyl Etera wale no
1. Aia i ka läÿau, o ka ethanol a me kia sulfuricʻakika Ua enaena i 140 ℃ hiki intermolecular dehydration huahana me Etera wale no. I kia sulfuricʻakika me ka dehydrating Agena ma ka hōʻeleu.
2. helu kaulike: 2 CH3-CH2-OH - catalyzed a kia H2SO4 → ma 140 ℃ CH3-CH2-O-CH2-CH3 + H2O)
Polyurethane elastomer
Polyurethane elastomer mea he polyurethane lua lako o keʻano, no ka mea, o kona 'ole me ka pahee a me ka paakiki mau Hoʻohana, hiki ke hoʻololi i ka haawi hakakino mea me ke kiʻekiʻe ikaika, toughness, e mae wale ia'ku, aila ia'ku, maikaʻi hana, nā me ka laholio me kiʻekiʻe elasticity a me rigidity o ke ea, i kapaia "lei-hoʻopale laholio."
Polyurethane elastomer hiki e hoʻohana i ka ia nui laholio mastication, hoʻohuihui, hoola iho la oia mōlina kaʻina (hoʻohuli i MPU); no hoi e i ka wai a laholio, hoolei mōlina pahaʻawa, ninini, centrifugal mōlina (i kapa i ka CPU); hiki e hoomakaukau no hoi i pellets, a, e like ano ea, ka pahu kui, extrusion, calendering, e hoʻokani mōlina a me nā keʻano o ka hanaʻana (o ka CPU). Mōlina a me ka pahu kui ua'omoʻomoʻia māhele, i loko o ka kekahi huahelu o ka paakiki, akā, i hiki ke okiia, wili,ʻeli a me nā machining. Aaioee o ke 'ano, ka polyurethane elastomer loa ākea applicability, noi hoʻomau e? Anoe.
Oil ia'ku,'okikene kolu ia'ku, kūnewa ia'ku, pāhawewe ia'ku, haʻahaʻa wela, ka aniani moakaka kani maikai, ikaika mea pīlali, maikaʻi biocompatibility a me ke koko hoʻokaulike. Mau pono o ka polyurethane elastomer hoʻomano hoʻohana i koa, aerospace, Acoustic, kālaimeaola a me nā kumu.
Ke kumu nui ia Morohiha o polyurethane elastomer:
1, o ka hana ana o ka hoʻoneʻe laulā. A helu o ke kino, a me mechanical hana nā hoailona hiki e like ma ka koho ana maka mea a me nā mea haʻilula keimikala, i loko o ka kekahi huahelu, e hālāwai me ka 'okoʻa koi no huahana hula. E like me ka paakiki, mea pinepine nui he anakahi o ka huina hoonui o mea hoʻohana, nā i ka polyurethane elastomer Shore A paakiki o 20 a no laila, palupalu pai rollers, akā, no hoi i oi aku mamua o 70 Shore D paakiki o ka hana laholio lole wili ua hiolo, keia mea he mau elastomeric mea hiki ole ke hana. Polyurethane elastomer mea he Polar pīlali lako e haku ana o na mea he nui Hoʻohana a me ka paakiki Hoʻohana haku o'ōlewa kaula, a me ka hana hou a me ka mea ulu o ka Polar pūʻulu nuʻa paakiki Hoʻohana like ana o elastomer palapala ikaika a me ka paakiki e mahuahua pela, e.
2, i oi Wear e kū'ē'ē mai. Pakahi aku la ia ma kahi o ka wai, kaʻaila wetting meakino na hana rula, o ka Wear ia'ku mea pinepine mau manawa i kekahi mau manawa o ka maʻamau laholio pono hana. Mea hao nā mea wela e like kila, naʻe loa paʻakikī, akā,ʻaʻole pono e mae wale, e like me nui EII ni nenoaio i? Āpana o ka Yellow River, ka overcurrent hoomalu eiiiiiaiou a me ka mea hiki ke hooheheeia waha ke komo lima o ke komo lima ma hope o ka hailonaʻana no sediment ka'aʻaiawā, 'aʻole i lawe haneri o na hora i ka loa hookomo i kulu, oiai ka hoʻohana o polyurethane elastomer kapa komo iā ia ka waha o ke komo lima a me ke komo lima o ka palekana mea ana hana 1800 i loko o kekahi mea uuku i komo. Others, e like me ka laiki mīkini wili pōhaku hoʻohana laholio lole wili kaulua mīkini, vibrating pākū kānana lānahu ahi e hoomakaukau ai, a Track kahua pâʻani nei runway, hōʻeuʻeu aila sila hoʻohana kaʻa hāpaiʻia manu'ū,'eleweka huila a me ka huila wili skates, etc. i kekahi polyurethane elastomer Ua hele mai nei i loko o. Ma keia olua wahi mea pono, e hoʻoikaika i ka kaʻi lau waiwai o ke kū'ē o ka haʻahaʻa-paakiki polyurethane elastomer hoa, e hoʻoikaika 'hookomo ia'ku ma lalo o haawe hanau ana, e nui ana ke hooloihi i ka uuku nui o ka Aluminum disulfide, graphite a mea pīlaliʻaila i loko o ia ka polyurethane elastomer, etc. lubricant.
Post manawa: Nov-24-2018