Ntchito mundawo ndi chiyembekezo chitukuko cha zotanuka polyurethane zipangizo

Ma polyurethane elastomers ndi a chipika ma polima, ndiko kuti, ma macromolecules a polyurethane amapangidwa ndi "zigawo zofewa" ndi "zigawo zolimba" ndikupanga gawo lolekanitsa laling'ono.Magawo olimba (ochokera ku isocyanates ndi ma chain extenders) amamwazikana m'chigawo chofewa chagawo (chochokera ku oligomer polyols) ndikuchita gawo la mfundo zolumikizirana.Chifukwa chake, poyerekeza ndi mphira wopangira (ma elastomers), ma elastomer a polyurethane ali ndi mphamvu zabwinoko komanso kukana kuvala, kutalika kwapamwamba kumatha kusungidwa ngati kuuma kuli kwakukulu.

Elastic polyurethane zipangizo, amatchedwa "mlandu" m'mayiko akunja, makamaka zikuphatikizapo chikhalidwe polyurethane elastomer mankhwala, polyurethane pulasitiki msewu wonyamukira ndege ndi zipangizo m'misewu, polyurethane zokutira madzi, zomatira, sealants, potting zomatira, etc., mlandu pafupifupi 40% ya kuchuluka kwazinthu zonse za polyurethane.Zambiri mwazinthu zochiritsidwa zopangidwa ndi zida zachitsulo (zochokera kumadzi ndi zosungunulira zimachotsa madzi ndi zosungunulira) ndi zinthu zopanda thovu zotanuka polyurethane.PU synthetic leather resin, zokutira zina ndi zomatira ndizopangidwa ndi zosungunulira kapena zamadzimadzi, zomwe zimatha kuwonedwa ngati zida za polyurethane elastomer m'njira yotakata.Mwa njira yopapatiza, polyurethane elastomer imatanthawuza kuponyedwa kwa polyurethane elastomer (CPU), thermoplastic polyurethane elastomer (TPU) ndi yosakanikirana ya polyurethane elastomer (MPU), kuwerengera 10% kapena kuchepera pang'ono pa polyurethane yonse.CPU ndi TPU ndiye ma elastomers akuluakulu a polyurethane, ndipo kusiyana kwawo kuli pazifukwa monga kupanga ndi unyolo wowonjezera.Mtundu woterewu wa polyurethane elastomer, womwe umadziwikanso kuti "rabara ya polyurethane", ndi wamtundu wa rabala yapadera yopangira.High performance polyurethane elastomer ndiye chinthu chomwe chimakhala ndi kukana kovala bwino pakati pa zida zonse zopangidwa ndi polima.Amadziwika kuti "king of wear resistance".Imagwiritsidwa ntchito kwambiri m'magawo ambiri, ndipo mapulogalamu atsopano akukulirakulirabe.

Polyurethane elastomers angagwiritsidwe ntchito m'malo zitsulo, mapulasitiki ndi mphira wamba m'madera ena.

Poyerekeza ndi zida zachitsulo, polyurethane elastomer ili ndi ubwino wopepuka kulemera, phokoso lochepa, kukana kutaya, kutsika mtengo wokonza ndi kukana kwa dzimbiri la asidi.Poyerekeza ndi mapulasitiki, ali ndi ubwino wovuta kwambiri komanso kukana kuvala kwambiri.Poyerekeza ndi mphira wamba, polyurethane elastomer ili ndi ubwino wa kukana kuvala, kukana kudula, kukana misozi, kunyamula kwakukulu, kukana kwa ozoni, kupanga kosavuta, kupukuta ndi kuthira, ndi kuuma kwakukulu.

Polyurethane elastomer ndi mtundu wofunikira wa polyurethane.Pakalipano, kugwiritsa ntchito kwake kumakhala pafupifupi 10% ya magwiritsidwe onse a polyurethane.Polyurethane elastomer imagwiritsidwa ntchito popanga mitundu yonse ya mawilo a mphira, malamba otumizira, mipope ya mphira yosagwira madzi komanso yosagwira, mizere yosindikizira ndi mphete, mikanda ya chingwe ndi mafilimu osiyanasiyana.Mankhwalawa amagwiritsidwa ntchito kwambiri muzitsulo ndi zitsulo, kupanga mapepala, migodi, makina, kusindikiza ndi mafakitale ena.Polyurethane elastomer imatha kusinthidwa ndi ma polima ena, ulusi, zodzaza ufa, ndi zina zambiri kuti muchepetse mtengo ndikuwongolera magwiridwe antchito.