Glass fiber fabric having double-sided twill stereo structure and method for preparing composite material
A double-sided twill and glass fiber technology, applied in fabrics, chemical instruments and methods, textiles, etc., can solve the problems of increasing the overall structure density, increasing the cost of raw materials, increasing the negative effect of interlayer strength of phenolic materials, etc., and achieving thickness and Increased weight ratio, low operating time and cost, and good process performance
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[0032] The invention relates to a double-sided twill weave glass fiber three-dimensional fabric and a method for preparing the composite material thereof: the fabric has a 2 / 6 double-sided twill weave imitation three-dimensional structure, and is prepared into a prepreg by a solution impregnation method, and then is cured by lamination Laminated structural composites, or formed and cured with honeycomb or foam cores into sandwich structural composites.
[0033] The schematic diagram of the texture of the double-sided twill glass fiber fabric is attached figure 1 As shown, it has a 2 / 6 double-sided twill imitation three-dimensional structure, its warp yarn density is 40±2 yarns / cm, and the weft yarn density is 12±1 yarns / cm (6±0.5 yarns / cm / layer, 2 layers in total). The density is 600±30g / m 2 , the thickness is 0.70±0.05mm; its warp and weft tensile breaking strength can reach 3000N / 25mm and 5000N / 25mm respectively.
[0034] The warp yarn is an alkali-free glass fiber yarn wi...
Embodiment 1
[0063] The non-alkali glass fiber yarn of EC9-34×1×2S40T5 (silane type sizing grade) is used as the warp yarn, and the alkali-free glass fiber yarn of EC9-68×1×4S28T5 is used as the weft yarn, and the three-dimensional weaving mechanism is adopted A fabric with a 2 / 6 double-sided twill imitation three-dimensional structure was prepared, and its performance test results are shown in Table 1.
[0064] Adopt above-mentioned fiberglass fabric to carry out the preparation of phenolic resin-based composite material, the steps are as follows:
[0065] 1) Stir evenly the barium phenolic resin with the aldehyde-phenol ratio of 1.6 and technical alcohol, and make the specific gravity of the obtained resin solution be 1.10;
[0066] 2) The solution obtained in step 1) and the fabric are continuously impregnated, dried and wound on a vertical solution impregnation machine to obtain a fiber-reinforced phenolic resin prepreg. The main process parameters of dipping include: the distance bet...
Embodiment 2
[0075]The non-alkali glass fiber yarn of the specification EC9-68×1Z28T5 (silane type sizing agent grade) is used as the warp yarn, and the non-alkali glass fiber yarn of the specification EC9-68×1×4S28T5 is used as the weft yarn, and is prepared by a three-dimensional loom A fabric with a 2 / 6 double-sided twill imitation three-dimensional structure was developed, and its performance test results are shown in Table 1.
[0076] Adopt above-mentioned fiberglass fabric to carry out the preparation of phenolic resin-based composite material, the steps are as follows:
[0077] 1) Stir evenly the barium phenolic resin with the aldehyde-phenol ratio of 1.6 and technical alcohol, and make the specific gravity of the obtained resin solution be 1.10;
[0078] 2) The solution obtained in step 1) and the fabric are continuously impregnated, dried and wound on a vertical solution impregnation machine to obtain a fiber-reinforced phenolic resin prepreg. The main process parameters of dippi...
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