polyurethane qhia
Lub npe tag nrho yog polyurethane. Ib qho sib txuas polymer. Xyoo 1937, nws tau tsim los ntawm O. Bayer thiab lwm tus. Muaj ob hom polyurethane: polyester thiab polyether. Lawv tuaj yeem ua rau hauv polyurethane plastics (feem ntau ua npuas plastics), polyurethane fibers (paub hu ua spandex hauv Suav teb), roj hmab polyurethane thiab elastomers.
Mos polyurethane (PU) feem ntau muaj cov qauv thermoplastic linear qauv, uas muaj qhov zoo dua qhov ruaj ntseg, tshuaj lom neeg ua haujlwm, thev taus ntev thiab cov cuab yeej muaj zog dua li PVC cov khoom txau, thiab muaj tsawg dua kev deformation. Kev tshav kub zoo rwb thaiv tsev, suab rwb thaiv tsev, tiv taus poob siab, thiab tiv thaiv tus kab mob ua haujlwm. Yog li ntawd, nws yog siv los ua kev ntim khoom, suab rwb thaiv tsev thiab cov ntaub ntawv lim dej. Rigid PU yas yog lub teeb, soundproof, zoo tshaj nyob rau hauv rwb thaiv tsev kub, tshuaj lom neeg tsis kam, cov khoom hluav taws xob zoo, yooj yim rau cov txheej txheem, thiab cov dej tsis nqus. Nws yog tsuas yog siv hauv kev tsim kho, tsheb, dav hlau, thiab cov khoom siv rwb thaiv tsev thermal. Kev ua tau zoo polyurethane elastomer yog nruab nrab ntawm cov yas thiab roj hmab, roj tsis kam, ua haujlwm tsis kam, kub tsis kam, kev laus tiv taus, siab hardness thiab elasticity. Mas siv hauv kev lag luam khau thiab kev kho mob kev lag luam. Polyurethane tuaj yeem ua rau hauv kev ua kom tawv, lo lo tawv, tawv hluavtaws, thiab cov zoo li.