Ob leeg TDI thiab MDI yog ib yam ntawm cov khoom siv raw hauv polyurethane ntau lawm, thiab lawv tuaj yeem hloov tau ib leeg rau qee qhov, tab sis tsis muaj qhov sib txawv me me ntawm TDI thiab MDI ntawm cov qauv, kev ua haujlwm thiab kev siv subdivision.
1. Cov ntsiab lus isocyanate ntawm TDI yog siab dua li ntawm MDI, thiab cov foaming ntim ib chav tsev loj dua.Lub npe tag nrho ntawm TDI yog toluene diisocyanate, uas muaj ob pawg isocyanate ntawm ib lub nplhaib benzene, thiab cov ntsiab lus ntawm pawg isocyanate yog 48.3%;Lub npe tag nrho ntawm MDI yog diphenylmethane diisocyanate, uas muaj ob lub nplhaib benzene thiab cov ntsiab lus ntawm pawg isocyanate yog 33.6%;Feem ntau, qhov siab dua cov ntsiab lus isocyanate, qhov loj dua chav tsev foaming ntim, yog li piv nrog ob, TDI chav tsev loj foaming ntim loj dua.
2. MDI tsis tshua muaj tshuaj lom, thaum TDI muaj tshuaj lom heev.MDI muaj qhov tsis tshua muaj vapor siab, tsis yooj yim rau volatilize, tsis muaj ntxhiab tsw ntxhiab, thiab tsis muaj tshuaj lom rau tib neeg, thiab tsis muaj kev tshwj xeeb rau kev thauj mus los;TDI muaj lub siab vapor siab, yooj yim rau volatilize, thiab muaj ib tug muaj zog pungent tsw.Muaj cov kev cai nruj.
3. Kev laus ceev ntawm MDI system yog ceev.Piv nrog TDI, MDI system muaj kev kho ceev ceev, luv molding voj voog thiab ua npuas ncauj zoo.Piv txwv li, TDI-raws li ua npuas ncauj feem ntau xav tau 12-24h cov txheej txheem kho kom ua tiav qhov kev ua tau zoo tshaj plaws, thaum MDI system tsuas yog xav tau 1h kom ua tiav qhov kev ua tau zoo tshaj plaws.95% kev loj hlob.
4. MDI yog ib qho yooj yim los tsim ntau yam khoom ua npuas ncauj nrog cov txheeb ze siab.Los ntawm kev hloov cov kev faib ua feem ntawm cov khoom, nws tuaj yeem tsim cov khoom nrog ntau yam hardness.
5. Lub downstream ntawm polymerized MDI yog tsuas yog siv rau zus tau tej cov ua npuas ncauj, uas yog siv nyob rau hauv lub tsev txuag hluav taws xob,tub yees lub freezers, thiab lwm yam. Kev tsim kho thoob ntiaj teb suav txog li 35% ntawm cov polymerized MDI noj, thiab lub tub yees thiab lub tub yees tso nyiaj txog li 20% ntawm cov polymerized MDI noj;ntshiab MDI mas Nws yog siv los tsim pulp,khau ib leeg, elastomers, thiab lwm yam, thiab yog siv rau hauv cov tawv hluavtaws, khau khiab, tsheb, thiab lwm yam.;thaum lub downstream ntawm TDI yog tsuas yog siv nyob rau hauv mos ua npuas ncauj.Nws tau kwv yees tias kwv yees li 80% ntawm lub ntiaj teb TDI yog siv los tsim ua npuas ncauj, uas yog siv rau hauv rooj tog, tsheb thiab lwm yam.
Post lub sij hawm: Jun-29-2022