Importance

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Abstract

In a three-dimensional fabric as woven on a rotor-carrier type 3D fabric weaving machine, there is provided a reinforcing three-dimensional fabric for composite material, which is imparted with unevenly functioning characteristics by arbitrarily changing the thread orientation angle in part of the fabric structure. In the weaving process of the three-dimensional fabric, a large number of threads, which are oriented with an angle of inclination relative to the longitudinal direction of the fabric, are folded back at the surface of the fabric as they are continuously interwoven in the longitudinal direction thereof, and varied orientation angle portions are formed in part of the sectional area of the fabric by partially changing the angle of inclination of thread portions which continuously extend between adjacent weave portions of the fabric. The three-dimensional fabric can be woven on a rotor-carrier type 3D fabric weaving machine having a large number of rotors arranged in a matrix of multiple rows and arrays alternately with a large number of thread carriers, dividing the rotors into two groups each consisting of rotors in non-confronting positions, repeating a cycle of regular weaving operations where firstly rotors of a first group are turned through 90.degree. or 180.degree. in one direction and then rotors of the second group are turned through 90.degree. or 180.degree. in the reverse direction.

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First Claim