Muaj kev cuam tshuam los ntawm kev tsim kho, khoom siv, thev naus laus zis thiab ib puag ncig, polyurethane rigid ua npuas ncauj yuav muaj ntau yam txawv txav thaum lub sijhawm tsim kho, uas yuav ua rau cov khoom tsis zoo. Tam sim no txheeb xyuas ntau yam xwm txheej raws li hauv qab no:
1. Cov ntaub ntawv A thiab B tsis ua npuas dej tom qab sib tov: a.Cov khoom kub tsis tshua muaj; b.Qhov kev faib tawm ntawm ob pawg tsis raug tso cai; c.Cov catalyst tsis ntxiv; d.Qhov zoo ntawm cov khoom B tsis zoo;
2. Lub shrinkage ntawm polyurethane txhav ua npuas ncauj: a. Cov khoom siv muaj ntau yam, uas txo lub zog ntawm polyurethane rigid ua npuas ncauj thiab ua rau shrinkage; b. Kev sib xyaw ntawm cov khoom siv thiab cov kua hauv cov phom txau tsis sib xws, cov tshuaj tsuag cua me dhau, lossis cov viscosity ntawm cov khoom loj dhau; c. Kev kho sai heev ua rau muaj kev tsim ntau dua Kaw cell; d. Cov roj yog deformed los ntawm thermal expansion thiab contraction.
3. Polyurethane txhav ua npuas ncauj yog nkig: a. Khoom siv B muaj ntau yam khoom; b. Cov dej noo ntau dhau; c. Ua hauj lwm saum npoo kub yog tsawg dhau; d.Material B muaj cov kua qaub loj thiab muaj ntau yam impurities; e. Cov nplaim hluav taws ntau dhau yog ntxiv.
4. Polyurethane txhav ua npuas ncauj yog mos heev thiab kho qeeb dhau: a. Tus nqi ntawm cov khoom B yog me me; b.Lub tin catalyst nyob rau hauv cov khoom A yog me me heev; c. Cov huab cua kub, cov khoom kub, thiab blanking ua hauj lwm qhov kub thiab txias yog tsawg.
5. Polyurethane txhav ua npuas ncauj tawg: a. Lub foaming gas yog generated sai heev, thiab cov amine catalyst nyob rau hauv cov khoom A yuav tsum raug txo
2. Cov npuas dej stabilizer tsis raug lossis alkaline; 3. Lub catalyst tsis raug lossis ploj lawm, thiab cov tin catalyst hauv cov khoom A yuav tsum tau ntxiv; 4. Tus nqi kua qaub hauv cov khoom siv raw yog loj.
6. Lub polyurethane txhav ua npuas ncauj muaj lub qhov hws loj: a.Qhov ua npuas ncauj stabilizer tsis raug lossis ploj lawm; b. Muaj dej ntau (dej hauv cov foaming agent lossis polyether); c.Qhov sib xyaw ntawm cov khoom A thiab B tsis sib xws; Tus nqi acid yog siab; d. Cov roj tiam ceev nrawm dua li ntawm cov gel.
7. Rigid polyurethane ua npuas ncauj tawg los yog kub hnyiab: a.Qhov kub ntawm cov khoom yog siab; b.Cov catalyst ntau dhau; c.Qhov ib zaug pouring tus nqi yog loj heev, thiab cov npuas yog tuab heev; d.Qhov nyiaj ntxiv thaum dej siv los ua tus neeg ua npuas dej ntau dhau; .
8. Polyurethane txhav ua npuas ncauj ntog tawm: a.Qhov av ntawm cov tshuaj txau ua haujlwm yog siab, uas ua rau cov tshuaj tiv thaiv tsis tiav thiab hauv qab ua npuas ncauj ua nkig, nkig, thiab hmoov; b.Cov tshuaj txau ua haujlwm yog qias neeg, oily, thiab plua plav
9. Fumes los ntawm nruj polyurethane ua npuas ncauj: a.Qhov ntau npaum ntawm catalyst yog siab dhau lawm; b.Tus nqi hydroxyl ntawm polyether siab dhau lawm; c.Cov khoom kub yog siab dhau.
Los ntawm cov kev soj ntsuam saum toj no ntawm cov laj thawj, nws paub tias ntxiv rau lub hom phiaj tseem ceeb, muaj ntau yam cuam tshuam nrog cov khoom siv A. Hauv kev tsim khoom tiag tiag, kev hloov pauv ntawm viscosity, lub sijhawm ua kua mis, lub sijhawm foaming, lub sijhawm kho, thiab lwm yam. feem ntau yog kho cov khoom siv A.
Polyurethane txhav ua npuas ncauj tsis yog tsuas yog sib tov ntawm cov ntaub ntawv A thiab B. Nws yog ib qho tsim nyog yuav tsum nkag siab txog lub hauv paus ntsiab lus ntawm kev tsim polyurethane rigid foam thiab kev sib cuam tshuam ntawm txhua qhov khoom, ua kom tiav txhua yam ntawm cov khoom, tshuaj xyuas lawv raws li lub hom phiaj, thiab txiav txim qhov muaj nyob ntawm cov khoom. teeb meem los ntawm nws, thiab nws tsis yooj yim los tsim cov khoom zoo polyurethane ua npuas ncauj. Polyurethane rigid ua npuas ncauj khoom.
