+/-45-degree angle biaxial carbon fiber warp-knitted cloth

Abstract

The invention relates to a + / -45-degree angle biaxial carbon fiber warp-knitted cloth and belongs to the field of carbon fiber composites. The cloth is characterized in that one layer of parallel straight carbon fiber yarns are uniformly arranged in the direction at an angle of +45 degrees; the other layer of parallel straight carbon fiber yarns are uniformly arranged in the direction at an angle of minus 45 degrees; the models of the carbon fiber yarns are 3-50K; the mass per unit area of each layer of the parallel straight and uniformly arranged carbon fiber yarns is not less than 75g / m<2> and not more than 400g / m<2>; the laying density of the warp knitting threads is five threads per inch; and the mass per unit area of the laid warp knitting threads is not less than 5g / m<2> and not more than 12g / m<2>. The cloth has the following beneficial effects: the excellent performances of each component of the carbon fibers can be fully utilized, so that the tensile strength, the shear performance and the tear resistance are improved; and due to yarn binding, the friction between the yarns is improved and the interlayer performance of the fabric is enhanced, thus expanding the application range of the carbon fibers.

Description

technical field [0001] The invention relates to the field of carbon fiber knitted composite materials, in detail, it is a biaxial carbon fiber warp knitted fabric with an angle of ±45 degrees. Background technique [0002] As we all know, at present, the application of carbon fiber in many aspects such as aerospace, military industry, sports equipment, etc., mostly appears in the structure of unidirectional carbon fiber or carbon fiber woven fabric. Due to the anisotropy of the structure, the composite materials made of unidirectional carbon fibers make the tensile properties along the fiber direction much higher than the tensile properties perpendicular to the fiber direction, and the application range is limited. In addition, the thickness of unidirectional carbon fiber composite material is small, and the operation is complicated in the production of large and thick parts. [0003] The warp and weft yarns in the traditional carbon fiber woven structure are in a bending s...

AI Technical Summary

Problems solved by technology

Composite materials made of unidirectional carbon fibers, due to the anisotropy of their structure, make the tensile properties along the fiber direction much higher than the tensile properties perpendicular to the fiber direction, and the application range is limited

In addition, the thickness of unidirectional carbon fiber composite material is small, and the operation is complicated in the production of large thick parts.

[0003] The warp and weft yarns in the traditional carbon fiber woven structure are in a bending state. When the load is applied, the warp and weft yarns bend first and then straighten. The product has large deformation, low strength, low elastic modulus, poor shear performance, and poor interlayer performance. When the tearing force is applied, the single yarn is continuously stressed, the tear resistance is poor, and the fiber performance in the carbon fiber woven fabric cannot be fully exerted

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