Yuav ua li cas thiaj ua Polyurethane Daim txhuam cev tes ua npuas ncauj nrog me me thiab mos pores?
Hauv cov txheej txheem tsim khoom, cov qauv tsim nyog thiab yooj yim ua lub luag haujlwm tseem ceeb. Qhov xwm txheej uas tau tham hauv tsab xov xwm no yog nyob ntawm qhov chaw uas cov txheej txheem thiab cov qauv yog qhov tseeb.
Ua ntej, kho cov qauv piv txwv, txo MC thiab POP, thiab xyuam xim rau TDI Performance index. Muaj cov polyethers nyob rau hauv kev ua lag luam uas tuaj yeem ua rau qeeb ntawm foaming ceev. Raws li rau hom, nws tsis pom zoo. Tsuav nws yog ib qho polyether uas tuaj yeem ua rau qeeb ntawm foaming ceev, nws muaj txiaj ntsig zoo.
Tom qab ntawd, kev ua haujlwm thiab zoo ntawm silicone roj. Silicone roj nrog kev ua haujlwm siab tuaj yeem decompose ntawm qhov kub thiab txias kom cov pores thinner. Nws yog qhov zoo tshaj plaws los xaiv ib lub thoob tshiab ntawm cov roj silicone kom huv si, thiab ntxiv cov nqi tsim nyog.
Thib ob, txo cov kev siv cov catalysts thiab ua kom cov foaming ceev; cov nyhuv qhib ntawm tus neeg sawv cev qhib yog qhov tsis muaj zog.
Tsis tas li ntawd, qhov ceev thiab lub sij hawm ntawm stirring. Nyob rau theem pib, qeeb stirring yog yuav tsum tau, qeeb li sai tau, thiab lub sij hawm yog tswj nyob rau hauv ib tug ua tau ntau yam. Tom qab qeeb stirring, nres rau 1-2 feeb, tshem cov npuas dawb, do maj mam, ncuav TDI thiab do sai sai tom qab ib lub sij hawm ntawm lub sij hawm. Nws yog qhov zoo tshaj plaws los siv cov kiv cua zoo li nplawm hniav, hollow hauv nruab nrab, thiab ob lossis plaub rov qab baffles ntawm sab ntawm lub thoob. Txawm hais tias lub stirring qeeb los yog ceev, qhov ceev yuav tsum yog uniform li sai tau.
Los ntawm qhov no, nws tuaj yeem pom tias qhov nce qeeb, cov dej puv puv, cov khoom siv qis dua, thiab xaiv cov roj silicone zoo yog qhov tseem ceeb.
