Kev ua tau zoo thiab kev ua haujlwm ntawm prepregs feem ntau yog txiav txim siab los ntawm lawv cov kev tsis sib xws, uas cuam tshuam ncaj qha rau cov txheej txheem molding thiab cov khoom zoo kawg nkaus ntawm cov khoom sib xyaw ua ke. Qhov tseem ceeb ntawm cov no yog cov ntsiab lus ntawm resin, feem ntau qhia raws li qhov hnyav feem pua. Cov ntsiab lus tsis txaus tuaj yeem ua rau lub zog tsis txaus, thaum cov ntsiab lus ntau dhau tuaj yeem cuam tshuam cov txheej txheem layup thiab molding; qhov sib txawv poob ntawm 30% thiab 60%.
Fiber ntim cov ntsiab lus qhia txog qhov kev faib ua feem ntawm tag nrho cov ntim uas nyob hauv fibers hauv cov khoom sib xyaw. Feem ntau, cov ntsiab lus fiber ntau ntau ua rau cov khoom siv zog ntau dua thiab nruj; Txawm li cas los xij, qhov no yuav ua rau muaj kev txo qis hauv kev ua haujlwm thiab toughness. Rau kev siv aerospace, fiber ntau cov ntsiab lus ntawm carbon fiber prepregs feem ntau yog li ntawm 50% mus rau 65%, thaum cov ntaub ntawv npaj rau tsheb thiab kev siv marine tej zaum yuav muaj cov qib qis dua.
Viscosity thiab flow yam ntxwv kuj tseem ceeb tsis tau. Thaum lub sij hawm layup thiab kub - xovxwm molding txheej txheem, prepregs yuav tsum muaj ib tug tej yam℃ntawm flowability los xyuas kom meej uniform resin impregnation ntawm cov fibers. Feem ntau, cov khoom yuav tsum tau ua kom pom ib theem ntawm thixotropy nyob rau hauv chav tsev kub, tsis tau ntws thiab kho sai heev thaum lub sij hawm rhuab curing theem. Curing kub thiab curing lub sij hawm yog lwm txheej ntawm cov cim tseem ceeb, raws li lawv ncaj qha cuam tshuam rau cov khoom sib xyaw kawg ntawm cov khoom siv kho tshuab thiab thermal stability. Rau prepregs siv ntau lub tshuab resin, qhov kub thiab txias ntau yam feem ntau spans los ntawm 120℃mus rau 180 degree, thaum lub sij hawm kho nws txawv ntawm ob peb kaum feeb mus rau ob peb teev, nyob ntawm seb cov khoom tuab thiab cov kev ua haujlwm tshwj xeeb.
