초록 ▼

A composite material comprises a web shaped material which is impregnated with a curable resin and which contains thermoplastic particles distributed in the web shaped material. The thermoplastic particles are of an expandable type but occur in the composite material in substantially unexpanded form

A composite material comprises a web shaped material which is impregnated with a curable resin and which contains thermoplastic particles distributed in the web shaped material. The thermoplastic particles are of an expandable type but occur in the composite material in substantially unexpanded form. The curable resin is in a A- or B-stage. In addition, the invention comprises use of a composite material of this nature for producing laminates by warm pressing and expanding the thermoplastic particles and a method for producing the composite material.

대표청구항 ▼

[ What is claimed is:] [1.] A method for producing a cured resin and foam-containing laminate by hot pressing, comprising:(i) preparing a semi-manufacture composite material by(a) providing a fibrous web material,(b) providing an impregnation solution containing a solvent, thermoplastic particles an

[ What is claimed is:] [1.] A method for producing a cured resin and foam-containing laminate by hot pressing, comprising:(i) preparing a semi-manufacture composite material by(a) providing a fibrous web material,(b) providing an impregnation solution containing a solvent, thermoplastic particles and a curable resin, said thermoplastic particles being expandable but occurring in the impregnation solution in unexpanded form,(c) impregnating the fibrous web material with the impregnation solution, and(d) regulating the solvent contents of the semi-manufacture composite material to not more than 40 percent by weight, said semi-manufacture composite material having the thermoplastic particles unexpanded and the curable resin in A- or B-stage, and(ii) hot pressing of said semi-manufacture composite material, to provide the cured resin and foam-containing laminate, the hot pressing being conducted so that the curable resin is caused to change from A- or B-stage to C-stage, the thermoplastic particles are caused to expand, and solvent contents remaining in the semi-manufacture composite material are caused to be evaporated.