Patent ID: 6524195
Filing Date: 2003-02-25
Classification: A63B,Y10T

Abstract:
A tubular body comprising: rolled layers of prepeg formed of reinforcing fibers impregnated with synthetic resin, wherein a ratio of impregnation of synthetic resin contained in a skew fiber body on which fibers are arranged on a skew direction and a ratio of impregnation of synthetic resin contained in an axial fiber body layer on which fibers are arranged in an axial direction, are each in a range from a value within a range between 10% wt to 25% wt, and a thin layer, the ratio of impregnation of synthetic resin of which is greater than 28% by weight, is provided between the skew fiber body layer and the axial fiber body layer,the skew fiber body layer, the axial fiber body layer and the thin layer are rolled over substantially the whole length of the tubular body, and a ratio of impregnation of synthetic resin each on the skew fiber body layer and the axial fiber body layer is lower than that of impregnation of synthetic resin on the thin layer.