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Preparation method of fiber fabric with shaping and toughening double functions

A fiber fabric and dual-function technology, which is applied in the field of liquid molding composite material manufacturing, can solve the problems of high manufacturing cost and complicated process route, and achieve the effects of improving interlayer toughness, reducing solvent residue, and good wettability

Inactive Publication Date: 2014-07-02
AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method adopted in the above-mentioned patents, whether it is the preparation method of the fabric surface toughening layer or the preparation method of the shaping layer, has a relatively complicated process route, high manufacturing costs, and requires the use of complex continuous production equipment to achieve prefabrication. fabric preparation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A thermoplastic resin toughener and a benzoxazine resin auxiliary binder are attached to one of the surfaces by means of an atomized spraying process, and a benzoxazine resin prepolymer powder setting agent is attached to the other surface by mechanical spreading. Its preparation method comprises the following steps:

[0019] (1) Select thermoplastic resin as the toughening agent and benzoxazine resin as the auxiliary binder, wherein the amount of the auxiliary binder is 5 to 30 wt% of the amount of the toughening agent, and the above two components are dissolved in a solvent to prepare A uniform toughening agent-auxiliary binder mixed solution with a concentration of 5-20wt%;

[0020] (2) Utilize a spray gun to uniformly atomize and spray the above-mentioned mixed solution to the surface of the fiber fabric, and dry at room temperature to obtain a fabric with a toughening agent-auxiliary binder attached to one side, wherein the amount of the toughening agent is 10-25g / ...

Embodiment 1

[0024] The mixture of thermoplastic polyaryletherketone resin and benzoxazine resin is dissolved in tetrahydrofuran to obtain a toughening agent-auxiliary binder mixed solution, wherein the amount of thermoplastic polyaryletherketone resin toughening agent is 15g / m 2 Fiber fabric, the amount of benzoxazine resin auxiliary binder is 3g / m 2 Fiber fabric, the solid content of the mixed solution is 20wt%, stir and dissolve evenly, transfer it into a watering can, spray it on one side of the fiber fabric uniformly, leave it at room temperature for 12 hours, and dry it to obtain one side with toughening agent-auxiliary Binder fiber fabric.

[0025] Prepolymerize the benzoxazine resin at 140°C for 70 minutes, cool to room temperature, mechanically grind, and pass through a 50-mesh sieve to obtain a benzoxazine resin prepolymer powder setting agent, and uniformly mechanically spread the powder setting agent on the fiber On the side of the fabric without toughener-auxiliary binder, th...

Embodiment 2

[0028] The mixture of thermoplastic polyaryletherketone resin and benzoxazine resin is dissolved in tetrahydrofuran to obtain a toughening agent-auxiliary binder mixed solution, wherein the amount of thermoplastic polyaryletherketone resin toughening agent is 18g / m 2 For fiber fabrics, the amount of benzoxazine resin auxiliary binder is 4g / m 2 , the solid content of the mixed solution is 15wt%, stir and dissolve evenly, transfer it into a watering can, spray it uniformly on one side of the fiber fabric, place it at room temperature for 12 hours, and dry it to obtain a toughening agent-auxiliary binder on one side fiber fabric.

[0029] Prepolymerize the benzoxazine resin at 160°C for 40 minutes, cool to room temperature, mechanically grind, and pass through a 50-mesh sieve to obtain a benzoxazine resin prepolymer powder setting agent, and uniformly mechanically spread the powder setting agent on the fiber On the side of the fabric without toughener-auxiliary binder, the amoun...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention belongs to the technical field of manufacturing of a liquid-state forming composite material, and relates to a preparation method of a fiber fabric with shaping and toughening double functions. When the double-function fabric is prepared, a thermoplastic resin toughening agent and a benzoxazine resin auxiliary adhesive are attached to one surface by using an atomizing spraying process, and a benzoxazine resin prepolymer powder shaping agent is attached to the other surface in a mechanical spreading mode. The process is simple and easy to implement; and the toughening agent, the auxiliary adhesive and the shaping agent are uniformly distributed on the surfaces of the fiber fabric without entering the interior of tows, so that the fiber fabric keeps good wettability to a resin matrix.

Description

technical field [0001] The invention belongs to the technical field of manufacturing liquid forming composite materials, and relates to a method for preparing a fiber fabric with dual functions of shaping and toughening. Background technique [0002] In terms of low-cost manufacturing technology of advanced composite materials, liquid molding technology represented by resin transfer molding (Resin Transfer Molding, RTM) technology has become the mainstream of research and development in the field of international composite materials. At present, my country's aviation prepreg composite materials have begun to take shape and application experience, while liquid molding composite material technology started relatively late in my country. In terms of material development, the liquid molding material system with high toughness, high heat and humidity resistance and good process performance has become an important research direction. [0003] The basic principle of the RTM proces...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/53D06M15/63D06M15/37
Inventor 刘刚胡晓兰益小苏余荣禄
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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