초록 ▼

A tubular body comprises: rolled layers of prepreg formed of reinforcing fibers impregnated with synthetic resin, wherein a ratio of impregnation of synthetic resin contained in a skew fiber body layer on which fibers are arranged in a skew direction and also a ratio of impregnation of synthetic res

A tubular body comprises: rolled layers of prepreg formed of reinforcing fibers impregnated with synthetic resin, wherein a ratio of impregnation of synthetic resin contained in a skew fiber body layer on which fibers are arranged in a skew direction and also a ratio of impregnation of synthetic resin contained in an axial fiber body layer on which fibers are arranged in an axial direction are in a range from a value approximately not lower than 10 wt % to a value lower than 25 wt %, and a thin layer, the ratio of impregnation of synthetic resin of which is high, is provided between the skew fiber body layer and the axial fiber body layer. The specific strength and specific rigidity of the tubular body are high, and the tubular body is less susceptible to separation and damage of the fibers and layers even if an impact force is given to it.

대표청구항 ▼

[ What is claimed is:] [1.] A tubular body comprising:a skew layer formed of fiber reinforced fibers impregnated with synthetic resin, said skew layer having fibers substantially oriented in a skew direction and having a ratio of impregnation of synthetic resin within a range between ten percent and

[ What is claimed is:] [1.] A tubular body comprising:a skew layer formed of fiber reinforced fibers impregnated with synthetic resin, said skew layer having fibers substantially oriented in a skew direction and having a ratio of impregnation of synthetic resin within a range between ten percent and twenty percent by weight;an axial layer formed of fiber reinforced fibers impregnated with synthetic resin, said axial layer having fibers substantially oriented in an axial direction and having a ratio of impregnation of synthetic resin within a range between ten percent and twenty percent by weight; andan intermediate layer disposed between said skew layer and said axial layer, said intermediate layer having a ratio of impregnation of synthetic resin within a range between twenty eight percent to fifty eight percent by weight.