Pulu
* ʻO Polyurethane (PU) ka pōkole o ka polyurethane, polyisocyanate a me ka polyhydroxy polymer polymerization, aia i loko o ke kaulahao nui o nā polymers i loaʻa i nā ʻāpana kaulahao urethane repetitive (-NHCOO-) o nā pūhui polymer.
* Hoʻopilikino ʻia nā huahana plastik PU
ʻO ka polyurethane, ka mea i ʻike ʻia he polyurethane a me ka polyurethane, he papa o nā macromolecules i loaʻa nā ʻāpana ʻano urethane i ke kaulahao nui. Loaʻa i kēia ʻano mea polymer ka elasticity o ka lāʻau a me ka ikaika a me ka hana hoʻoponopono maikaʻi ʻana o ka plastic, a he waiwai hoʻohana koʻikoʻi ma nā māla nui ʻehiku o ka plastics, rubber, foam, fiber, coatings, adhesives and functional polymers. Hoʻohana nui ʻia i ka ʻoihana i nā kaʻa haʻahaʻa wikiwiki, gaskets, moena kaʻa a me nā māla ʻē aʻe. I ke ola o kēlā me kēia lā, hoʻohana ʻia ka polyurethane e hana i nā ʻano ʻano like ʻole o ka huʻa a me ka ʻōhuʻu plastik.
He aha kāu e hana ai me PU Plastic?
ʻO ka polyurethane elastomers kahi papa o nā mea me nā mea ʻelua a me nā waiwai plastic, me ka ikaika tensile maikaʻi, ka ikaika o ka waimaka, ka hopena o ka hopena, ka pale ʻana i ka abrasion, ka pale ʻana i ka wā, ke kūpaʻa hydrolysis, ke kūpaʻa ʻaila a me nā pono ʻē aʻe.
Hoʻohana nui ʻia e like me nā mea hana (e like me nā hoses, gaskets, belts, rollers, gears, pipes, etc.), insulators, kāmaʻa wāwae a me nā kaila paʻa. No ka laʻana, e like me ka mining sieve plate, he haʻahaʻa haʻahaʻa, ke kiʻekiʻe permeability a me ke kūpaʻa ʻana ma mua o ka pā sieve metala kuʻuna. Eia kekahi, he biocompatibility maikaʻi loa ka polyurethane, ma ke ʻano he mea biomedical, hiki ke hoʻohana ʻia i nā pacemakers, nā kīʻaha koko artificial, iwi artificial, etc.
Eia kekahi mau noi no ka Polyurethane (PU)
- Kaʻahele
- Kūkulu
- Mīkini
- lako uila
- Lako hale
- Ka Hana Meaʻai
- Ka lole lole a me ka lole
- ʻili synthetic
- Paʻi ʻana
- ʻoihana Petrokimia
- Haʻuki
- Papahana mālama ola kino
Nā ʻano ʻano Polyurethane (PU).
* Hoʻokaʻawale ʻia ʻo Polyurethane foam i 2 mau ʻano: ʻoʻoʻa a me ka flexible foam, me ka elasticity maikaʻi loa, elongation, ka ikaika hoʻopiʻi a me ka maʻalahi, a me ke kūpaʻa kemika maikaʻi. Eia kekahi, ʻoi aku ka maikaʻi o ka hana ʻana o ka polyurethane foam, adhesion, insulation a me nā waiwai ʻē aʻe, no ka hana maikaʻi loa o ka mea cushioning.
ʻO ka polyurethane elastomer ma muli o kona ʻano he ʻāpana kaulahao palupalu a paʻakikī, no laila hiki ke hoʻolālā ʻia ke kaulahao molekala e hāʻawi i ka ikaika kiʻekiʻe o ka waiwai, ka paʻakikī maikaʻi, ka pale ʻana i ka ʻaʻahu, ka ʻaila a me nā waiwai maikaʻi ʻē aʻe, i kapa ʻia ʻo "wear-resistant. rubber" polyurethane i ka manawa like me ka elasticity kiʻekiʻe o ka pahu a me ka paʻakikī o ka plastic.
* He polarity ikaika nā mea polyurethane, kahi e hiki ai iā lākou ke hoʻopaʻa paʻa me ka hapa nui o nā mea a hiki ke hoʻohana ʻia e like me nā mea hoʻopili i ke kahua paʻa.
* Hoʻohana nui ʻia ka polyurethane adhesives i ka hoʻopili ʻana, ke kūkulu ʻana, ka lāʻau, ka automotive, a me nā ʻoihana kāmaʻa.
Pehea i hana ʻia ai ka polyurethane (PU)?
Ma muli o ka hydrophobicity ikaika o ka polyurethane, pono e hoʻohana i kahi ʻano synthesis hou e hoʻomākaukau ai i ka emulsion PU, ʻo ke kaʻina hana synthesis o ka polyurethane waterborne e like me kēia: ① e ka oligomer polyol, chain extender, diisocyanate e hana i kahi kiʻekiʻe molecular mass o ka PU pre-polymer; ② neutralized ma hope o ka pre-polymer emulsified i loko o ka wai e hana i ka hoopuehu.
ʻO nā ʻano hana hoʻomākaukau emulsion polyurethane ʻelua mau ʻano nui: ke ʻano emulsification waho a me ke ʻano emulsification kūloko.
1. ʻO keʻano o ka emulsification waho keʻano o ka emulsification hoʻoikaika i mua o ka emulsifier, shear kiʻekiʻe.
2. Hana ʻia ke ʻano emulsification ponoʻī ma ka hoʻokomo ʻana i nā pūʻulu hydrophilic i loko o ka iwi mole o ka polyurethane.
Hoʻokomo ʻia nā pūʻulu hydrophilic i loko o ka ʻiʻo molecular PU e ka hoʻonui kaulahao o nā monomers hydrophilic, kahi i hui ʻia me nā hui paʻakai a me nā reagents paʻakai.
Polyurethane (PU).
- Hiki ke hoʻokaʻawale ʻia ka Polyurethane (PU) i ka hana hou ʻana i ke kino a me ke kemika.Hāʻawi ka hoʻolāʻau kino i kahi ala maikaʻi a me ka hoʻokele waiwai no ka hana hou ʻana i nā ʻōhua polyurethane rigid a me nā composites. Hoʻemi mua ʻia ka nui o nā hua hua polyurethane foam i kahi maʻamau i hiki ke hana hou ʻia i nā kaʻina hana lua. Hoʻohaʻahaʻa ʻia nā mea ʻōpala i hana hou ʻia, a i ʻole nā ʻokiʻoki mai ke kaʻina hana, i nā ʻano ʻoi aku ka maikaʻi e like me nā flakes, granules a pauka paha.ʻO ka hana hou ʻana i ke kemika ke ʻano o ka wāwahi ʻana i nā pua polyurethane i loko o ka polyurethane raw material a i ʻole nā mea kemika ʻē aʻe e hoʻohana ana i ka alcoholysis, amineysis, hydrolysis a i ʻole pyrolysis. Loaʻa i ka polyurethane foam nā kaula urethane a me ka urea. I ke kaʻina hana o ka waiʻona, aminolysis a me ka hydrolysis alkali, ka urethane a me ka urea paʻa i loko o ka mole polyurethane ua haki a decomposed i polyols, aromatic polyamines, carbon dioxide a pēlā aku.
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