Dab tsi yog cov teeb meem thiab kev daws teeb meem raupolyurethane prepolymerua?
Yog tias cov polyurethane prepolymer tsis ua tiav raws li cov txheej txheem raug thiab cov txheej txheem thaum ua tiav, ntau yam teeb meem yuav tshwm sim uas cuam tshuam rau kev ua haujlwm ntawm cov khoom. Niaj hnub no, tus editor yuav tham txog cov teeb meem thiab cov kev daws teeb meem thaum lub sij hawm ua cov cam khwb cia polyurethane prepolymer.
1. Khoom hardness tsawg
Qhov piv ntawm curing tus neeg sawv cev rau prepolymer yog tsis sib npaug, lub sij hawm tom qab kho tsis txaus, cov khoom kub yog siab thaum lub sij hawm xeem, thiab qhov chaw xeem tsis sib xws.
2. Lub sijhawm gel ntev
Qhov piv ntawm curing tus neeg sawv cev thiab prepolymer yog tsis sib npaug, cov khoom kub yog nruab nrab thiab pwm kub yog tsawg.
3. Cov khoom pob tshab thiab hardness tsawg
Lub sij hawm ntev los yog rov ua cua sov ntawm prepolymer, tsawg npaum li cas ntawm tus neeg saib xyuas ntxiv, qhov sib txawv ntawm kev khiav hauj lwm kub, thiab hygroscopicity ntawm tus neeg sawv cev curing thiab prepolymer.
4. Cov khoom nto yog puas
Cov pwm tsis raug ntxuav kom huv si, qhov kub ntawm qhov sib txawv ntawm prepolymer thiab pwm yog loj, thiab cov txheej txheem pouring yog tsis tsim nyog.
5. Cov khoom muaj ntau npuas
Cov tshuaj tua kab mob thiab cov tshuaj prepolymer yog hygroscopic, cov txheej txheem pouring yog tsis tsim nyog, cov ntaub ntawv raw defoaming tsis tiav, tus neeg saib xyuas curing, xim muab tshuaj txhuam, thiab lwm yam. muaj dej ntau dhau thiab sib xyaw tsis raug.
6. Cov khoom shrinkage siab
Qhov piv ntawm curing tus neeg sawv cev thiab prepolymer yog tsis sib npaug, qhov kub ntawm qhov sib txawv ntawm prepolymer thiab pwm yog loj, thiab qhov kub ntawm qhov sib txawv ntawm cov khoom thiab qhov chaw cia khoom yog loj.