Prepregs feem ntau muaj ob yam khoom: reinforcing fibers thiab matrix resin. Ua ke, ob lub ntsiab lus no txiav txim siab cov khoom siv kho tshuab thiab cov yam ntxwv ntawm kev siv cov khoom sib xyaw ua ke. Cov fibers reinforcing pab raws li cov txheej txheem pob txha ntawm prepreg, bearing feem ntau ntawm tensile, flexural, thiab shear loads.
Hom fibers muaj xws li carbon fibers, iav fibers, thiab aramid fibers. Cov pa roj carbon fibers yog cov yam ntxwv ntawm lawv lub zog siab, siab modulus, thiab lub teeb yuag, ua rau lawv siv dav hauv aerospace, tsheb, thiab siab -kawg siv cov khoom ua si. Cov iav fibers muaj kev tiv thaiv corrosion zoo heev thiab cov nqi qis, thiab feem ntau siv hauv cov nkoj hauv hiav txwv, cua turbine hniav, thiab cov khoom siv. Aramid fibers muaj qhov tshwj xeeb toughness thiab cuam tshuam tsis kam, nrhiav kev siv dav hauv kev tiv thaiv iav thiab tshwj xeeb hauv kev lag luam.
Lub matrix resin yog ib qho tseem ceeb nyob rau hauv lub prepreg, ua hauj lwm los khi cov fibers ua ke, hloov txhua yam kev nyuaj siab, thiab txhim kho cov khoom nyob rau hauv ib puag ncig kuj. Feem ntau siv resins suav nrog epoxy, phenolic, polyester, thiab vinyl ester resins. Epoxy resins yog dav saws vim lawv cov khoom siv zoo tshaj plaws thiab muaj zog adhesion; phenolic resins muaj nuj nqis rau lawv qhov siab -kub tsis kam thiab nplaim hluav taws zoo heev; thaum polyester thiab vinyl ester resins feem ntau siv rau hauv daim ntawv thov uas yuav tsum tau muaj kev tiv thaiv corrosion thiab dej.
Ntxiv nrog rau cov fibers thiab resins, prepregs kuj tseem muaj cov tshuaj tua kab mob, tshuaj ntxiv, thiab cov tshuaj ntxiv. Curing agents yog siv los tswj tus nqi curing ntawm resin thiab txiav txim siab nws qhov kev ua tau zoo kawg nkaus; additives pab txhim kho cov resin flowability, tack tswj, thiab processability; thiab fillers tuaj yeem muab tso ua ke los txhim kho cov khoom hnav tsis kam, nplaim retardancy, lossis thermal conductivity. Los ntawm kev txiav txim siab ntawm cov khoom sib txawv no, prepregs tuaj yeem tsim kho kom tau raws li cov kev xav tau tshwj xeeb ntawm ntau hom kev thov.
