Abstract: Warp knitted fabric for composites has attracted great academic interest because of its perfect three-dimensional structure, quasi isotropic and many other excellent properties. Warp knitted spacer fabric preforms system is the basis of the high-strength composite materials. Compared with the ordinary fabric preforms, non-crimp fabric composite materials have excellent mechanical properties, which can use carbon fiber and glass fiber to manufacture non-crimp fabric without damaging the strength, providing broader application for composite materials. This paper outlines the warp knitted fabric preparation method, structure and properties, and the prospect of warp knitted reinforced fabric preforms.

Key words: composite material, non-crimp fabric, warp knitted spacer fabric, preform, 3D fabric, performance