FIBER BASE FOR COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To enhance smoothness of a surface by raising a strength of an outer surface of a fiber base for a composite material including an interlaminar or connecting surface's shearing strength and raising an impregnation efficiency of a matrix at the time of complexing. SOLUTION: The fiber base for the composite material is obtained by superposing single or a plurality of three-dimensional structures 3 obtained by knitting long fibers, raising the interlaminar or connecting surface's shearing strength, expediting a permeability of a matrix near and in a surface, and treating gigging 5 for enhancing the smoothness of the surface. The gigging is executed for the fiber base for the composite material obtained by superposing two-dimensional structures obtained by knitting the long fibers or superposing the two-dimensional structures and the plurality of the three-dimensional structures. The gigging is executed by needle punching. A short fiber web is inserted between fiber textures simultaneously upon the gigging at the time of the needle punching as needed. Thus, the surface is smoothed.