Qhov txawv ntawm polyurethane TDI, MDI thiab NDI yog dab tsi?
TDI (Toluene Diisocyanate) yog ib qho khoom siv feem ntau siv polyurethane raw khoom, feem ntau siv hauv cov npuas mos, elastomers, txheej, thiab lwm yam. Nws cov qauv tshuaj muaj kev ua haujlwm siab, ua rau nws hnov mob nrog polyols los ua polyurethanes. Txawm li cas los xij, TDI muaj qee qhov tsis zoo thaum lub sijhawm tsim khoom thiab siv, xws li yellowing, tso tawm cov pa phem, thiab decomposition ntawm qhov kub thiab txias.
Polyurethane ua nrog TDI muaj zoo elasticity thiab yooj, ua rau nws haum rau mos foams thiab elastomer khoom. Vim nws cov reactivity siab, TDI tsis tshua zoo tagnrho rau tsim high-strength thiab high-hardness polyurethane khoom.
TDI muaj tus nqi raw khoom tsawg, ua cov khoom siv polyurethane ua nrog TDI ntau tus nqi.
MDI (Methylene Diphenyl Diisocyanate) muaj ntau dua reactivity thiab zoo dua kub kuj piv rau TDI. Polyurethane ua nrog MDI nthuav tawm lub zog ntau dua, hardness, thiab hnav tsis kam, ua rau nws haum rau cov foams nruj, elastomers, adhesives, thiab lwm yam khoom. Txawm li cas los xij, MDI kuj tseem muaj qhov tsis zoo xws li crystallization thiab tso tawm cov pa phem.
Polyurethane ua nrog MDI nta superior zog, hardness, thiab hnav tsis kam, ua rau nws zoo tagnrho rau nruj foams thiab elastomers. Piv nrog rau TDI, MDI muab cov cua sov zoo dua thiab muaj zog dua.
MDI kim dua TDI, ua rau cov nqi ntau lawm rau cov khoom siv polyurethane ua nrog MDI.
NDI (Naphthalene Diisocyanate) yog cov khoom siv tshiab polyurethane raw khoom nrog kev ua haujlwm siab thiab ua haujlwm kub zoo heev. Polyurethane ua nrog NDI boasts zoo heev lub zog, hardness, thiab hnav tsis kam, ua rau nws haum rau high-kev ua tau zoo daim ntaub ntawv xws li engineering yas thiab tshwj xeeb elastomers. Txawm li cas los xij, NDI muaj qhov tsis zoo xws li cov nqi tsim khoom siab thiab crystallization tendencies.
NDI-raws li polyurethane muab tshwj xeeb lub zog, hardness, thiab hnav tsis kam, ua rau nws haum rau cov khoom ua tau zoo xws li engineering plastics thiab tshwj xeeb elastomers. Piv rau TDI thiab MDI, NDI muaj kev ua kom sov zoo dua thiab zoo dua qhov ntev.
NDI yog kim dua ob qho tib si TDI thiab MDI. Txawm li cas los xij, nrog kev nce qib hauv cov thev naus laus zis ntau lawm thiab maj mam ua lag luam ntawm NDI kev tsim khoom, nws cov nqi yuav tsum txo qis thaum lub sijhawm.