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A preparation method of prepreg fiber bundles for three-dimensional weaving

A three-dimensional weaving and pre-preg technology, applied in the coating and other directions, can solve the problems of high resin content, low resin content, high thermal cycle stability, and achieve excellent mechanical properties, low thermal expansion coefficient, and thermal cycle stability. Good results

Active Publication Date: 2021-11-23
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has many shortcomings, such as high requirements for resin, strict requirements for mold and process, insufficient or uneven resin impregnation, high resin content, high cost, etc., making the traditional process of weaving first and then injecting glue It is difficult to efficiently produce continuous fiber composite parts with low resin content, small thermal expansion coefficient, high stability in cold and heat cycles, and large size

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1). The liquid epoxy resin and solid aryl acetylene resin were mixed at 20:80 under room temperature conditions, and then mixed at 60 ° C for 30 minutes.

[0019] 2). A mixed resin glue of 30 m / min at a rate of 30 m / min is impregnated with a mixed resin glue of 30 m / min, cooling to room temperature, and cooling to room temperature. Capsule fiber bundle;

[0020] 3). The above prepreg carbon fiber is woven into a composite blank member using a three-dimensional woven machine.

[0021] 4). The composite blank obtained by step 3) is placed in the mold, and the resin distribution is uniformly resin carbon fiber composite material.

Embodiment 2

[0023] 1). The liquid epoxy resin is mixed with the solid polyimide resin at a mass ratio of 30:70 under room temperature, and then mixed at 70 ° C for 20 minutes.

[0024] 2). In a dipole machine with a heating rubber, the glass fiber bundle is impregnated to a mixed resin gel of 70 ° C by a mixed resin glue of 25 m / min, cooled to room temperature. Tool glass fiber bundle;

[0025] 3). The above prepreg glass fibers are woven into a composite blank member using a three-dimensional woven machine.

[0026] 4). Composite blank prepared by step 3) is placed in a molding die, and a high-quality resin-based glass fiber composite material having a uniform resin distribution is obtained by heating.

Embodiment 3

[0028] 1). Under room temperature, the liquid epoxy resin is mixed with the solid phenol triazine resin in accordance with the mass ratio of 25:75, and then stirred at 80 ° C for 15 minutes mixing;

[0029] 2. Pre-dissipate Jiakufra fiber bundle;

[0030] 3). With a three-dimensional woven machine, the above prepreg is braided into a composite blank member;

[0031] 4). The composite blank obtained by step 3) is placed in a molded mold, and a high-quality resin KKK-Kovila fiber composite material such as a resin distribution is obtained by heating.

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Abstract

The invention discloses a method for preparing pre-impregnated fiber bundles for three-dimensional weaving. Liquid resin and solid resin are mixed and mixed evenly after heating; Prepreg continuous fiber bundles are obtained; then the prepreg continuous fiber bundles are woven into various shapes of composite material blanks; the resin is evenly distributed by heating and pressing and curing, and there is no phenomenon of rich glue and poor glue. A high-quality composite product with a fiber volume content exceeding 55%; the invention adopts a process of fully impregnating the fiber and resin first, and then performing three-dimensional weaving and molding manufacturing, so as to better control the resin content, the uniformity of resin distribution, and the fullness of resin and fiber. Infiltration, so as to obtain a high-performance continuous fiber composite material with excellent mechanical properties, good stability in cold and heat cycles, and low thermal expansion coefficient.

Description

Technical field [0001] The present invention belongs to the preparation of continuous fiber composite materials, and in particular, the present invention relates to a preparation method for preparing a prepreg for three-dimensional braid manufacturing composite. Background technique [0002] The three-dimensional braided composite is an advanced composite material manufacturing technology that is developed to adapt to the needs of structural and functional composites in the aerospace field. The use of three-dimensional woven technology can be used to design a reinforcement of the fiber reinforcement in the three-dimensional space, which is more free and more targeted, and the three-dimensional weaving of this semicomous reinforcement. Composite materials not only have the advantages of high-volume strength, high ratio modulus, but also high damage tolerance and fracture toughness, and feature resistance, no hierarchical, anti-ambrracted and fatigue. At present, there is often a m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/22B29C70/46B29B15/14C08L49/00C08L63/00C08L79/08C08L79/04C08K7/06
CPCB29B15/14B29C70/222B29C70/46C08J5/24C08J2349/00C08J2379/04C08J2379/08C08J2463/00C08K7/06
Inventor 许培俊张宁李菡冀有志侯进
Owner CHANGAN UNIV
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