Moulding material

摘要

A preform moulding material includes two individual unidirectional reinforcement layers of a fibrous reinforcement material and a resin material between adjacent ones of the fibrous reinforcement layers. The resin material is a matrix resin material that partially impregnates and conjoins the fibrous reinforcement layers. Each of the fibrous reinforcement layers includes a fabric that is skewed relative to a lengthwise direction of the preform moulding material and includes a weft of unidirectional fibrous reinforcement material disposed at an angle relative to the lengthwise direction and a warp of fibres in the lengthwise direction. The orientation of the unidirectional fibrous reinforcement material of one of the reinforcement layers differs from the orientation of the unidirectional fibrous reinforcement material of the other reinforcement layer such that the preform moulding material is bi-axial prepreg.