Cov khoom

Polyurethane (PU), lub npe tag nrho yog polyurethane, yog polymer compound.Nws tau tsim los ntawm Otto Bayer hauv xyoo 1937.Polyurethane tau muab faib ua ob pawg: hom polyester thiab hom polyether.Lawv tuaj yeem ua rau hauv cov yas polyurethane (feem ntau yog foamed plastics), polyurethane fibers (hu ua spandex hauv Suav teb), polyurethane rubbers thiab elastomers.

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.Nws muaj cov thermal rwb thaiv tsev zoo, lub suab rwb thaiv tsev, kev poob siab thiab kev ua haujlwm tiv thaiv kab mob.Yog li ntawd, nws yog siv los ua ntim, suab rwb thaiv tsev, lim khoom.

Rigid polyurethane yas yog lub teeb nyob rau hauv qhov hnyav, zoo heev nyob rau hauv lub suab rwb thaiv tsev thiab thermal rwb thaiv tsev, tshuaj tsis kam, zoo hluav taws xob zog, yooj yim ua, thiab tsis tshua muaj dej nqus.Nws yog tsuas yog siv nyob rau hauv kev tsim kho, tsheb, aviation kev lag luam, thermal rwb thaiv tsev cov ntaub ntawv.

Kev ua haujlwm ntawm polyurethane elastomer yog nruab nrab ntawm cov yas thiab roj hmab, roj ua haujlwm, hnav tsis kam, tsis kub tsis kam, kev laus ua haujlwm, siab hardness thiab elasticity.Feem ntau 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.

Polyurethane tau tshwm sim hauv xyoo 1930.Tom qab ze li ntawm 80 xyoo ntawm kev txhim kho thev naus laus zis, cov khoom siv no tau siv dav hauv cov khoom siv hauv tsev, kev tsim kho, cov khoom siv niaj hnub, kev thauj mus los, thiab cov khoom siv hauv tsev.