Patent ID: 9427934
Filing Date: 2016-08-30
CPC Classification: B29C,B32B,D04B,D04H,D10B,Y02P,Y10T

Claim Text:
1. A stitched carbon fiber base material, wherein a plurality of sheet materials are layered and then stitched and united together into the stitched base material with a stitching yarn woven while passing through the sheet materials, each sheet material is formed by arraying carbon fiber lines, each having a predetermined width, in parallel with one another while an array direction of the carbon fiber lines of each sheet material forms an angle in a range from ±30° to ±60° to a weaving advancing direction of the stitching yarn, and a stretch ratio of the stitched base material in its lengthwise direction in a case where a load per inch width of the stitched base material is applied in the weaving advancing direction of the stitching yarn is equal to or below 4% when the load is 5 N, and is equal to or above 10% when the load is 25 N.