BASE MATERIAL FROM STITCHED CARBON FIBRE AND WET PREPREG USING THEREOF Russian patent published in 2016 - IPC B32B5/12 B29B15/08 B32B5/28 B29C70/22 B32B5/26 B32B7/08 D04B21/16 D04H3/10 C08J5/24 

FIELD: space.

SUBSTANCE: invention can be used in aerospace industry, in production of sports goods and leisure products. Prepreg with formability comprises a base material from a stitched carbon fibre. Multiple sheet materials 1 are arranged in layers and then stitched and joined together in a stitched base material using stitch thread 2 interlaced when passing through sheet materials 1. Each sheet material 1 is formed by arranging lines 11 of the carbon fibre parallel to each other. Direction of arranging lines 11 of the carbon fibre of each sheet material 1 forms an angle ranging from ±30° to ±60° to the direction of movement of interlacing stitch thread 2. Degree of the stitched base material tension in its longitudinal direction in case when a specific load per inch of width of the stitched base material is applied in the direction of movement of interlacing stitch thread 2 is equal to or below 4 % when the load is equal to 5N and is equal to or higher than 10 % when the load is 25N. Prepreg is formed by impregnation of the base material from the stitched carbon fiber, in which multiple sheet materials 1 are arranged in layers and then stitched and joined together using stitch thread 2 interlaced when passing through sheet materials 1 by a thermosetting resin within the range from 30 wt% to 50 wt%.

EFFECT: invention enables to obtain a base material from a stitched carbon fibre, which has high shape stability and moldability and provides for convenience in processing a wet prepreg, facilitates production of a 3D shape.

9 cl, 6 dwg, 1 tbl, 4 ex