A kind of foam sandwich composite material and preparation method thereof

Abstract

The invention discloses a foam interlayer composite material and a preparation method thereof, and relates to the technical field of foam interlayer composite materials. The present invention provides a foam interlayer composite material and a preparation method thereof. The non-twisted roving of alkali-free glass fiber is directly combined with the high-strength industrial polyester filament roving without twisting to prepare glass / polyester blended roving, and then the glass / polyester blended roving is prepared. Mixed roving combined with multi-axial stitched fabric production technology, using multi-directional yarn angles to lay at least one oblique yarn layer, and stitching each layer of oblique yarns to prepare multi-axial glass / polyester seams Braided fabric, and the multi-axial glass / polyester seam braided fabric is used as the reinforced skin layer material to be superimposed on the upper and lower sides of the PVC foam sandwich core material, and the foam sandwich composite material is prepared by co-curing and molding with the vacuum infusion molding process technology. Due to the high-strength industrial polyester fiber The density is much lower than the density of alkali-free glass fiber, and the grammage of the foam sandwich composite material is greatly reduced, achieving the technical effect of making the foam sandwich composite material lightweight.

Description

technical field [0001] The invention relates to the technical field of sandwich composite materials, in particular to a foam sandwich composite material and a preparation method thereof. Background technique [0002] Sandwich composite materials are popular for their advantages of high specific stiffness and specific strength. According to different sandwich core materials, they can be divided into sandwich structure composite materials such as foam, honeycomb, and balsa wood, which can meet the actual structural strength and stiffness requirements. Under the premise of light weight, light weight, high-speed operation, and energy saving, it is widely used as a structural material in the manufacture of boats, wind turbine blades, and high-speed trains. [0003] In order to further improve the comprehensive performance of sandwich composite materials in all aspects, people have carried out in-depth research on the design and development of sandwich composite materials and rela...

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Problems solved by technology

[0005] The foam sandwich composite material provided by the related technology uses a large amount of glass fibers, and the glass fiber is a high-density inorganic fiber, which easily leads to a high dead weight of the sandwich composite material with the glass fiber multi-axial seam braided fabric as the reinforced surface layer. The lightweight concept of the material is contrary. In addition, in the preparation process of the foam sandwich composite material, the flanging effect of the glass fiber multi-axial cloth is poor, and the glass fiber is brittle and hard and easily broken into fine fibers, which are easy to adhere to The skin of the staff may be inhaled by the staff, which will bring great health risks to the staff

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