Patent ID: 11926074
Assignee: TORAY INDUSTRIES, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 7:
8. A cross-ply laminate that is made up of a plurality of prepregs each of which contains unidirectionally oriented reinforcing fibers and a resin and whose volume fraction Vf of the reinforcing fibers is 45 to 65% and that is configured to include incised prepregs whose fiber directions intersect substantially at right angle,
wherein each prepreg is an incised prepreg which includes a plurality of incisions extending across reinforcing fibers and of which substantially all the reinforcing fibers have a fiber length (L) of 10 to 300 mm and a tensile property 1 indicated below is satisfied in a 25° C. environment or a tensile property 2 indicated below is satisfied in a 60° C. environment,
(tensile property 1) in the case where a fiber direction of one of the incised prepregs in the cross-ply laminate is 0°, load 1×0.5<load 2<load 1×1.5 where the load 1 is a load that occurs in the cross-ply laminate in a 0° direction when a tensile strain of 1% is applied to the cross-ply laminate in the 0° direction and the load 2 is a load that occurs in the cross-ply laminate in the 0° direction when a tensile strain of 2% is applied to the cross-ply laminate in the 0° direction, and
(tensile property 2) in the case where the fiber direction of one of the incised prepregs in the cross-ply laminate is 0°, load 1×0.5<load 2<load 1×1.5 where the load 1 is a load that occurs in the cross-ply laminate in the 0° direction when a tensile strain of 1% is applied to the cross-ply laminate in the 0° direction and the load 2 is a load that occurs in the cross-ply laminate in the 0° direction when a tensile strain of 2% is applied to the cross-ply laminate in the 0° direction.