摘要 |
PROBLEM TO BE SOLVED: To impregnate a fiber reinforcing material in a short time by a method wherein unsaturated polyester resin mixture containing liquid polymerizable monomer and curing catalyst at a specific ratio is applied to two sheets of release films and thickening agent and fiber reinforcing material of specific weight is added onto the release films and the release films are bonded to each other, with the coated surfaces being oriented inwards and pressed and heated at specific temperatures. SOLUTION: Unsaturated polyester resin mixture 2 containing 30-120 pts.wt. liquid polymerizable monomer and 0.1-7 pts.wt. curing catalyst, with respect to 100 pts.wt. unsaturated polyester resin, is mixed in a mixer 1. The mixture is applied to one or both of release films 3 at room temperature by means of a coater 4 and 20-120 pts.wt. thickening agent comprising thermoplastic resin powder 6 is scattered over the films 3 by means of a scattering machine 5 and next, 20-70 pts.wt. fiber reinforcing material 5 is cut off by means of a chopper 8 and added thereto and two sheets of release films 3, 3 are bonded to each other and pressed by means of a press roller 9 and heated to 40-70 deg.C to accelerate thickening so as to be wound around a winding roller 10. |