Polyurethane flexible ua npuas ncauj yog ib hom kev hloov pauv polyurethane ua npuas ncauj nrog qee yam elasticity, uas yog cov khoom siv polyurethane tshaj plaws hauv cov khoom siv polyurethane.
Polyurethane mos ua npuas ncauj yog feem ntau qhib-cell qauv, nrog tsawg ntom, zoo elastic rov qab, suab haum, qhov cua, cua sov preservation thiab lwm yam khoom. Moulded mos ua npuas ncauj yog cov khoom ua npuas ncauj ncaj nraim nrog cov khoom siv raw thiab tom qab ntawd txhaj rau hauv pwm kom ua npuas dej rau hauv ib qho kev xav tau los ntawm txoj kev sib txawv.
Yuav ua li cas los daws qhov teeb meem ntawm kev sib txuas yooj yim thiab tev ntawm daim tawv nqaij mos ua npuas ncauj?
Ua ntej tshaj plaws, nws yuav tsum paub meej tias cov epidermis muaj feem xyuam rau cov txheej txheem no:
a. Kev teeb tsa thiab fluidity ntawm cov ntaub ntawv: suav nrog cov khoom siv raw, dej, thiab cov khoom ntxiv, txhua qhov kev teeb tsa tsis raug yuav tsis ua haujlwm;
b. Pwm kub, khoom kub: yuav tsum tsis txhob qis dhau;
c. Pwm qauv, tsim thiab tso;
d.Kev xaiv thiab ntau npaum li cas ntawm tus neeg tso tawm, qhov ntau npaum li cas yuav defoam, tsawg dua yuav tev;
e. Tswj lub sijhawm curing ntawm cov khoom. Kev kho tsis txaus (qhov kev faib ua feem ntawm cov khoom B siab dhau lawm) lossis kev kho kom ntev ntev tuaj yeem ua rau tev;
f. Lwm yam cuam tshuam.
Peb tuaj yeem hloov kho los ntawm cov ntsiab lus hauv qab no:
1. nrhiav qhov laj thawj hauv cov qauv. Yog tias cov khoom siv B muaj T / M, qhov sib piv yuav tsum tau txiav txim siab thiab MDI yuav tsum tau nce kom tsim nyog; nws raug pom zoo kom tshem tawm T-9 thiab ntxiv DMEA (dimethylethanolamine); tuav lub fluidity ntawm cov khoom.
2. cov dej thiab cov roj silicone yuav tsum yog nruab nrab, feem ntau tswj tau li ntawm 2.8--3.5, txwv tsis pub nws yuav lo rau ntawm daim tawv nqaij; cov roj silicone yuav tsum tsis txhob siv ntau dhau, txwv tsis pub nws yuav tev.
3. xyuas cov pwm, seb nws puas huv, seb puas muaj cov pa tawm, thiab seb qhov chaw tso khoom puas sib npaug, txwv tsis pub cov npuas npuas yuav ua rau cov mucous.
4. pwm kub thiab cov khoom kub, qhov sib txawv loj ntawm ob qhov kub thiab txias yog yooj yim tev thiab lo. Cov pwm kub feem ntau yog 30 txog 50 degrees, thiab cov khoom kub yog 21 txog 25 degrees. Qhov kub thiab txias yuav tsum tau kho thaum lub caij.
Tsis tas li ntawd, nws raug nquahu kom siv lub sijhawm ncua amine catalyst kom qeeb cov tshuaj tiv thaiv ceev; siv cov waxy tso tawm tus neeg saib xyuas kom tsim nyog tswj cov khoom lag luam lub sijhawm.
