TDI, MDI thiab NDI yog peb qhov tseem ceebcov ntaub ntawv polyurethane, thiab lawv muaj qhov sib txawv ntawm cov qauv tshuaj, kev ua tau zoo thiab kev siv.Bellow kab lus yog ib qho kev qhia txog peb cov ntaub ntawv nrog rau kev sib piv ntawm qhov zoo thiab qhov tsis zoo, qhov sib txawv ntawm kev ua haujlwm thiab kev txheeb xyuas tus nqi.
TDI (toluene diisocyanate) yog cov khoom siv feem ntau siv polyurethane raw khoom, feem ntau yog siv hauv cov ntaub mos mos, elastomers, coatings thiab lwm yam kev lag luam.Cov qauv tshuaj ntawm TDI ua rau nws muaj zog heev thiab tuaj yeem cuam tshuam nrog polyols los tsim polyurethane.Txawm li cas los xij, TDI muaj qee qhov tsis zoo. nyob rau hauv kev tsim khoom thiab siv cov txheej txheem, xws li yellowing yooj yim, tso tawm cov pa phem, thiab yooj yim decomposition ntawm kub kub.
Kev ua tau zoo sib txawv: Polyurethane ua los ntawm TDI muaj zoo elasticity thiab softness, thiab yog haum rau ua mos foams, elastomers thiab lwm yam khoom.Vim nws siab reactivity, TDI yog me ntsis tsis txaus rau zus tau tej cov high-strength thiab high-hardness polyurethane khoom.
Tus nqi: Tus nqi ntawm TDI raw cov ntaub ntawv yog tus nqi qis, yog li tus nqi ntawm kev siv TDI los ua polyurethane kuj tsawg.
Piv nrog TDI, MDI (diphenylmethane diisocyanate) muaj ntau dua reactivity thiab zoo dua tshav kub kuj.Polyurethane ua los ntawm MDI muaj siab zog, hardness thiab hnav tsis kam, thiab yog haum rau ua tawv foams, elastomers, adhesives thiab lwm yam khoom. Txawm li cas los, MDI kuj muaj. qee qhov tsis zoo hauv kev tsim khoom thiab siv cov txheej txheem, xws li yooj yim crystallization thiab tso tawm cov pa phem.
Kev ua tau zoo sib txawv: Polyurethane ua los ntawm MDI muaj lub zog siab, hardness thiab hnav tsis kam, thiab tsim nyog rau kev ua npuas tawv tawv, elastomers thiab lwm yam khoom siv.Piv nrog TDI, polyurethane ua los ntawm MDI muaj cov cua sov zoo dua thiab muaj zog dua.
Tus nqi: Tus nqi ntawm MDI raw cov ntaub ntawv yog qhov siab, yog li tus nqi ntawm kev siv MDI los ua polyurethane yog qhov siab.
NDI (naphthalene diisocyanate) yog ib yam tshiab ntawm polyurethane raw khoom nrog siab reactivity thiab zoo heev tshav kub tsis kam.Polyurethane ua los ntawm NDI muaj zoo heev zog, hardness thiab hnav tsis kam, thiab yog haum rau ua high-zoo polyurethane khoom, xws li engineering yas thiab tshwj xeeb elastomers.Txawm li cas los xij, NDI kuj muaj qee qhov tsis zoo hauv kev tsim khoom thiab siv cov txheej txheem, xws li cov nqi ntau lawm thiab yooj yim crystallization.
Kev ua tau zoo sib txawv: Polyurethane ua los ntawm NDI muaj lub zog zoo heev, hardness thiab hnav tsis kam, thiab yog tsim rau kev ua haujlwm siab polyurethane cov khoom, xws li engineering plastics thiab tshwj xeeb elastomers.Piv nrog TDI thiab MDI, polyurethane ua los ntawm NDI muaj kev kub siab dua thiab zoo dua dimension stability.
Tus nqi: Tus nqi ntawm NDI raw cov ntaub ntawv yog tus nqi siab, yog li tus nqi ntawm kev siv NDI los ua polyurethane kuj tseem siab heev.Txawm li cas los xij, nrog kev nce qib ntawm cov thev naus laus zis ntau lawm thiab kev ua tiav ntawm cov khoom lag luam, tus nqi ntawm NDI yuav tsum tau ua. maj mam txo.
Hauv cov ntsiab lus, muaj qhov sib txawv ntawm cov qauv tshuaj, cov khoom siv thiab kev siv ntawm peb cov ntaub ntawv polyurethane raw TDI, MDI thiab NDI.Ntawm lawv, TDI muaj elasticity zoo thiab softness, haum rau zus tau tej cov mos foams, elastomers thiab lwm yam khoom; MDI muaj zog, hardness thiab hnav tsis kam, haum rau zus tau tej cov foams tawv, elastomers thiab lwm yam khoom; NDI muaj lub zog zoo heev, hardness thiab hnav tsis kam, haum rau kev tsim cov khoom lag luam zoo polyurethane, xws li engineering plastics, tshwj xeeb elastomers, thiab lwm yam.Thaum xaiv polyurethane raw cov ntaub ntawv, kev txiav txim siab yuav tsum tau ua raws li kev ua tau zoo thiab cov nqi tsim nyog. ntawm cov khoom.