| 摘要 |
PROBLEM TO BE SOLVED: To provide a photo-setting prepreg capable of surely attaining close adhesion by a simple defoaming work. SOLUTION: The photo-setting prepreg P curable by the irradiation of light having a specific wavelength is produced by impregnating resins R1, R2 containing a photopolymerization initiator in fibrous substrates G1, G2 and forming in the form of a sheet. The prepreg has an upper layer 1 and a lower layer 2 produced by impregnating the resins R1 and R2 in the fibrous substrates G1 and G2 respectively and integrating the layers by lamination. The upper layer 1 contains at least two kinds of photopolymerization initiators in the resin R1, a part of the resin R1 is prepolymerized and cured by the irradiation of light having the first specific wavelength to activate at least one kind of the photopolymerization initiators, and the lower layer 2 contains the resin R2 containing exclusively a photopolymerization initiator which is not activated by the light having the first specific wavelength. COPYRIGHT: (C)2008,JPO&INPIT
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