| 摘要 |
PURPOSE:To improve shock resistance and vibration damping performance by winding and coating a coating yarn round a combined filament yarn having a specific degree of filament combination so as to form a coated combined filament yarn having a specific volumetric content of reinforced fiber and a specific weight ratio of a coating yarn and stacking concentrically cord braids formed by braiding the coated combined filament yarn and throwing the same into a metal mold to be subjected to hot and pressure forming. CONSTITUTION:A coating yarn 13 made of a thermoplastic matrix fiber is wound and spread round a combined filament yarn 12 made of thermoplastic matrix fibers and reinforced fibers to form a coated combined filament yarn 11, plural cord braids formed by braiding coated combined filament yarns are concentrically stacked, and a tubular multi-braid is hot-formed in a metal mold. The combined filament yarn 12 is an untwisted combined filament yarn having 30% or more degree of filament combination, the multi-braid is formed by two to five cord braids, the reinforced fiber volumetric content of the coated combined filament yarn is 30-65%, and the weight ratio of the coating yarn 13 to the coated combined filament yarn 11 is 1-10%. The number of cord of the cord braid is from 24 to 48 in the innermost layer, from 36 to 96 in the outermost layer, and from 24 to 96 in the intermediate layer. |
