Ngwaahịa

Polyurethane (PU), aha zuru oke nke polyurethane, bụ ụdị ngwakọta macromolecular.Ọ bụ Otto Bayer mere ya na 1937. A na-ekewa Polyurethane n'ime ụdị polyester na ụdị polyether.Enwere ike ịme ha ka ọ bụrụ plastik polyurethane (karịsịa plastic ụfụfụ), eriri polyurethane (a na-akpọ spandex na China), roba polyurethane na elastomer.Polyurethane dị nro na-abụkarị usoro ntanetị nke thermoplastic, nke nwere nkwụsi ike ka mma, nkwụsi ike nke kemịkalụ, nkwụsi ike na ihe eji arụ ọrụ karịa ihe ụfụfụ PVC, ma nwee obere nrụrụ mkpakọ.Igwe ọkụ dị mma, mkpuchi ụda, nguzogide ujo na arụ ọrụ mgbochi nje.Ya mere, a na-eji ya dị ka nkwakọ ngwaahịa, ihe mkpuchi ụda na ihe nzacha.Plastic polyurethane siri ike bụ ìhè dị arọ, magburu onwe ya na mkpuchi ụda na ikpo ọkụ ọkụ, nguzogide kemịkalụ, dị mma na arụmọrụ eletrik, dị mfe nhazi, na obere ntinye mmiri.A na-ejikarị ya eme ihe n'iwu ihe owuwu, ụgbọ ala, ụlọ ọrụ ụgbọ elu na ihe nhazi ihe mkpuchi ọkụ.Ọrụ nke polyurethane elastomer dị n'etiti plastik na roba, nke na-eguzogide mmanụ, abrasion, okpomọkụ dị ala, ịka nká, ike siri ike na elasticity.A na-ejikarị ya na ụlọ ọrụ akpụkpọ ụkwụ na ụlọ ọrụ ahụike.A pụkwara iji polyurethane mee ihe ntanye, mkpuchi, akpụkpọ anụ sịntetik, wdg