Preparation method of high-temperature-resistant thermoplastic composite unidirectional prepreg tape

A unidirectional prepreg tape, composite material technology, applied in the direction of coating, etc., can solve the problem of not providing solvent treatment, winding, solvent environment pollution and so on

Pending Publication Date: 2022-03-04
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention makes the continuous fiber-reinforced high-performance thermoplastic resin-based composite material solution impregnation molding process possible, and solves the problems of resin dissolution and fiber impregnation during continuous fiber winding and pultrusion of high-performance polyarylether series resins. The glass transition temperature of polyarylethersulfoneketone (PPESK) is 260-305°C, and there is no technical solution for solvent treatment. There are potential safety hazards such as solvent volatilization, environmental pollution, high temperature, flammability and explosion.

Method used

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  • Preparation method of high-temperature-resistant thermoplastic composite unidirectional prepreg tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] T-700 carbon fiber is used as reinforcing fiber, thermoplastic polyimide resin with a glass transition temperature Tg of 350°C developed by Changchun Yinghua Institute of Chinese Academy of Sciences is used as matrix resin, DMAc is used as solvent, and water is used as precipitant. The equipment parameters are set as: yarn feeding tension 2kg, winding tension 2kg, running speed 2.5m / min.

[0034] Specific steps are as follows:

[0035] 1) Configure the resin solution:

[0036] Weigh 2 kg of resin, put it into a flask, add 6 kg of solvent, and dissolve at room temperature to obtain a resin solution with a solid content of 25%, and add it to the dipping tank 3;

[0037] 2) Fiber impregnation: the fiber 1 enters the dipping tank 3 after being spread by the spreading rod 2, and the fiber 1 is fully impregnated in the dipping tank 3;

[0038] 3) Precipitation: Weigh 60kg of water, add it to the precipitation tank 4, import the unidirectional prepreg tape obtained in step 2...

Embodiment 2

[0043] T-700 carbon fiber is used as the reinforcing fiber, the thermoplastic polyimide resin with a Tg of 350°C developed by the Changchun Applied Chemical Institute of the Chinese Academy of Sciences is used as the matrix resin, and the solvent is a mixed solvent of DMF and DMAc (the mass ratio of DMF and DMAc = 1:1) , water is the precipitation agent. The equipment parameters are set as: yarn feeding tension 2kg, winding tension 2kg, running speed 1.5m / min.

[0044] Specific steps are as follows:

[0045] 1) Configure the resin solution:

[0046] Weigh 2 kg of resin, put it into a flask, add 8 kg of solvent, and dissolve at room temperature to obtain a resin solution with a solid content of 20%, and add it to the dipping tank 3;

[0047] 2) Fiber impregnation: the fiber 1 enters the dipping tank 3 after being spread by the spreading rod 2, and the fiber 1 is fully impregnated in the dipping tank 3;

[0048] 3) Precipitation: Weigh 60kg of water, add it to the precipitati...

Embodiment 3

[0053] T-700 carbon fiber is used as reinforcing fiber, polyarylether sulfone ketone (PPESK) resin with a Tg of 260°C is used as matrix resin, NMP is used as solvent, and water is used as precipitant. The equipment parameters are set as: yarn feeding tension 2kg, winding tension 2kg, running speed 2m / min.

[0054] Specific steps are as follows:

[0055] 1) Configure the resin solution:

[0056] Weigh 1.4kg of resin, put it into a flask, add 2.6kg of solvent, and dissolve at 60-80°C to obtain a resin solution with a solid content of 35%, and add it to dipping tank 3;

[0057] 2) Fiber impregnation: the fiber 1 enters the dipping tank 3 after being spread by the spreading rod 2, and the fiber 1 is fully impregnated in the dipping tank 3;

[0058] 3) Precipitation: Weigh 60kg of water, add it to the precipitation tank 4, import the unidirectional prepreg tape obtained in step 2) into the precipitation tank 4, set the water temperature in the precipitation tank 4 to 40-60°C, and...

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Abstract

The invention belongs to the technical field of composite materials, and particularly relates to a design and processing technology of fiber-reinforced high-temperature-resistant thermoplastic resin-based composite prepreg. The invention provides a preparation method of a fiber-reinforced high-temperature-resistant thermoplastic composite unidirectional prepreg tape, which comprises the following steps: firstly, preparing a resin solution, then carrying out precipitation treatment after fibers are fully infiltrated by the resin solution, and precipitating resin from the solution by using a precipitation agent so as to be attached to the fibers, so that solvent recovery and preliminary sizing of the prepreg tape are realized, and the fiber-reinforced high-temperature-resistant thermoplastic composite unidirectional prepreg tape is obtained. And performing drying, high-temperature setting, cooling and rolling to obtain the fiber-reinforced high-temperature-resistant thermoplastic composite unidirectional prepreg tape. The unidirectional prepreg tape prepared by the method is uniform and stable in glue content and high in production efficiency; the method is wide in application range, suitable for dissolvable thermoplastic resin, especially suitable for high-temperature-resistant thermoplastic polyimide resin with the glass transition temperature of 350 DEG C, and suitable for large-scale continuous production of prepreg.

Description

technical field [0001] The invention belongs to the technical field of composite materials. It involves the design technology of fiber-reinforced composite materials, specifically the design and processing technology of fiber-reinforced high-temperature resistant thermoplastic resin-based composite material prepreg. Background technique [0002] There are many studies on continuous fiber reinforced high-performance thermoplastic resin matrix composite prepregs at home and abroad, but most of them focus on powder mixing, film lamination, fiber mixing, melt impregnation, etc. High-performance thermoplastic resins such as PEEK, PEKK, etc. Dissolved only in concentrated H 2 SO 4 Therefore, there are few research reports on the solution dipping molding process. The resin content of the prepreg prepared by the solution method has high control precision and the quality of the prepreg is uniform and stable. The solution method is often used to prepare thermosetting resin-based pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B15/14
CPCB29B15/14
Inventor 张德宾徐国芬袁宝国夏池孔国强袁君闫龙马承燕陶炜魏化震李树军邵军
Owner SHANDONG NON METALLIC MATERIAL RES INST
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