US 5,599,612 A · Woven carbon fiber fabric

Abstract

A prepreg precursor including a carbon fiber woven fabric having applied to the fabric between about 0.5 to about 10 wt % of a stabilizer material for stabilizing the structural form of the fabric. Prepregs can then be produced using the woven fabric. Undesired settlement of matrix resin from the surface of the woven fabric is thus prevented. Hence, compared with a prepreg prepared using conventional woven fabric, a prepreg prepared by using the woven fabric of the invention can hold its tackiness for a long time and can be used to produce a fiber reinforced composite material excellent in smoothness without being devoid of surface resin.

Claims9

Dependent claims

A prepreg precursor comprising:

(a) carbon fiber threads woven into a carbon fiber woven fabric having a thickness, said threads of said woven fabric having points of intersection and being crimped in the direction of said fabric thickness;
and
(b) a stabilizer material, applied to said fabric for stabilizing the structural form of the fabric by promoting adhesion between said threads at said points of intersection, in an amount after hardening between about 0.5 to about 10 wt % by weight of fibrous material of the fabric;
wherein said precursor has a bending resistance value between about 20 to about 150 mm and a cover factor between about 90 to about 99.8%, and wherein said precursor is capable of being impregnated with a matrix resin to form a prepreg such that said fabric is flattened in said thickness direction and remains in a flattened state.

1 more element

Dependencies are inferred from the claim text.

Woven carbon fiber fabric

Life of this patent

Woven carbon fiber fabric

Life of this patent

Abstract

Claims9