Cov khoom

Polyurethane (PU), lub npe tag nrho ntawm polyurethane, yog ib hom macromolecular compound.Nws tau tsim los ntawm Otto Bayer hauv xyoo 1937. Polyurethane tau muab faib ua hom polyester thiab polyether hom.Lawv tuaj yeem ua rau hauv cov yas polyurethane (feem ntau yog npuas yas), polyurethane fiber ntau (hu ua spandex hauv Suav teb), polyurethane roj hmab thiab elastomer.Mos polyurethane feem ntau yog cov thermoplastic linear qauv, uas muaj kev ruaj ntseg zoo dua, tshuaj tiv thaiv, resilience thiab mechanical zog dua li PVC ua npuas ncauj cov ntaub ntawv, thiab muaj tsawg compression deformation.Zoo rwb thaiv tsev kub, suab rwb thaiv tsev, poob siab tsis kam thiab tiv thaiv kab mob kev ua haujlwm.Yog li ntawd, nws yog siv los ua ntim, suab rwb thaiv tsev thiab lim cov ntaub ntawv.Rigid polyurethane yas yog lub teeb nyob rau hauv hnyav, zoo heev nyob rau hauv lub suab rwb thaiv tsev thiab tshav kub rwb thaiv tsev, tshuaj tiv thaiv, zoo nyob rau hauv hluav taws xob kev ua tau zoo, yooj yim rau txheej txheem, thiab tsis tshua muaj dej nqus.Nws yog tsuas yog siv nyob rau hauv kev tsim kho, tsheb, aviation kev lag luam thiab thermal rwb thaiv tsev cov ntaub ntawv.Kev ua tau zoo ntawm polyurethane elastomer yog nruab nrab ntawm cov yas thiab roj hmab, uas tiv taus roj, puas, tsis kub, laus, siab hardness thiab elasticity.Nws yog tsuas yog siv hauv kev lag luam khau thiab kev kho mob kev lag luam.Polyurethane kuj tseem siv tau los ua cov nplaum, txheej, tawv hluavtaws, thiab lwm yam