Menene bambanci tsakaninTPUda kuma PU?
TPU (polyurethane elastomer)
TPU (Thermoplastic Polyurethane Elastomer)nau'in filastik ne mai tasowa. Saboda kyawun iya sarrafa shi, juriya ga yanayi, da kuma kyawun muhalli, ana amfani da TPU sosai a masana'antu masu alaƙa kamar kayan takalma, bututu, fina-finai, na'urori masu juyawa, kebul, da wayoyi.
Polyurethane thermoplastic elastomer, wanda aka fi sani da thermoplastic polyurethane roba, wanda aka rage wa suna TPU, nau'in polymer ne mai layi na (AB) n-block. A polyester ne mai nauyin kwayoyin halitta (1000-6000) ko polyether, kuma B diol ne wanda ke ɗauke da atom ɗin carbon madaidaiciya guda 2-12. Tsarin sinadarai tsakanin sassan AB shine diisocyanate, wanda yawanci MDI ke haɗa shi.
Robar polyurethane mai amfani da thermoplastic ta dogara ne akan haɗin hydrogen tsakanin ƙwayoyin halitta ko kuma haɗin gwiwa mai sauƙi tsakanin sarƙoƙi na macromolecular, kuma waɗannan tsarin haɗin gwiwa guda biyu ana iya juyawa tare da ƙaruwa ko raguwar zafin jiki. A cikin yanayin narkewa ko mafita, ƙarfin haɗin gwiwa yana raunana, kuma bayan sanyaya ko fitar da ruwa mai narkewa, ƙarfin haɗin gwiwa mai ƙarfi yana haɗuwa tare, yana dawo da halayen daskararrun asali.
Elastomers na thermoplastic na polyurethaneAna iya rarraba su zuwa nau'i biyu: polyester da polyether, tare da fararen barbashi masu siffar ƙwallo ko ginshiƙai marasa daidaituwa da kuma yawan da ya kai 1.10-1.25. Nau'in polyether yana da ƙarancin yawa fiye da na nau'in polyester. Zafin canjin gilashin na nau'in polyether shine 100.6-106.1 ℃, kuma na nau'in polyester shine 108.9-122.8 ℃. Zafin karyewar nau'in polyether da nau'in polyester yana ƙasa da -62 ℃, yayin da ƙarancin juriyar zafin jiki na nau'in ether mai tauri ya fi na nau'in polyester kyau.
Halaye masu ban mamaki na polyurethane thermoplastic elastomers sune juriya mai kyau ga lalacewa, juriya mai kyau ga ozone, tauri mai yawa, ƙarfi mai yawa, sassauci mai kyau, juriya mai ƙarancin zafi, juriya mai kyau ga mai, juriya ga sinadarai, da juriya ga muhalli. A cikin yanayin danshi, kwanciyar hankali na hydrolysis na polyether esters ya fi na nau'ikan polyester.
Elastomers na thermoplastic na Polyurethane ba su da guba kuma ba su da wari, suna narkewa a cikin sinadarai masu narkewa kamar methyl ether, cyclohexanone, tetrahydrofuran, dioxane, da dimethylformamide, da kuma a cikin gaurayen sinadarai masu narkewa waɗanda suka ƙunshi toluene, ethyl acetate, butanone, da acetone a cikin daidaiton da ya dace. Suna nuna yanayin rashin launi da haske kuma suna da kyakkyawan kwanciyar hankali na ajiya.
Lokacin Saƙo: Afrilu-22-2024