... cross section. The reinforced materials include fiberglass roving, continuous fiberglass mat, stitched fiberglass mat and surface veil etc. Unsaturated polyester resin ... the extremely high longitudinal strength, the fiberglass mat (continuous strand mat, knitted mat and so on) makes the product ... usually the unsaturated polyester resin, the vinly resin, or the epoxy resin and the phenolic resin, the ...