Patent ID: 9701069
Date: 2017-07-11
CPC Classifications: B29C,B29K,C08J

Claim:
1. A method for manufacturing a composite material, comprising performing press molding of a fiber matrix structure sheet including reinforcing fibers and a matrix resin which mainly includes a polyester-based resin having a crystallization temperature of 185° C. or lower, wherein the press molding is cold pressing, wherein preliminary press molding is performed in advance prior to the cold pressing of the fiber matrix structure sheet, wherein the matrix resin prior to the preliminary press molding is in a granular form, wherein the reinforcing fibers prior to the preliminary press molding are in a fiber bundle shape, after the preliminary press molding, the fiber matrix structure becomes an interim base material for the cold pressing, wherein a length of the reinforcing fibers is from 20 to 100 mm, and wherein the reinforcing fibers include fibers in a fiber bundle shape and opened fibers.