Preparation method of polyimide prepreg

A polyimide and polyimide resin technology, which is applied in the field of preparation of polyimide prepregs, can solve the problem of low preparation efficiency, and the final volatile content and viscosity control of prepregs are greatly affected by ambient temperature. and other problems, to achieve the effect of reducing porosity, realizing batch stable preparation, and improving flatness

Active Publication Date: 2018-10-16
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing process adopts natural drying, and the final volatile content and viscosity control of the prepreg are greatly affected by the ambient temperature, and the preparation efficiency is low

Method used

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  • Preparation method of polyimide prepreg
  • Preparation method of polyimide prepreg

Examples

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preparation example Construction

[0035] Such as figure 1 Shown, a kind of preparation method of high temperature resistant polyimide prepreg, the preparation raw material of this high temperature resistant polyimide prepreg comprises polyimide resin solution and fiber reinforcement; The steps of this method comprise:

[0036] (1) polyimide resin solution is placed in reaction ax and carries out vacuum suction filtration, removes excess solvent;

[0037] (2) the treated polyimide resin solution obtained in the step (1) is placed in the glue tank, and adopts casting process, the polyimide resin solution is evenly coated on the release paper, polyimide The imide resin solution forms a polyimide resin film on the release paper;

[0038] (3) pulling the fiber reinforcement to the top of the polyimide resin film in step (2) by a set tension, and impregnating the polyimide resin film into the fiber reinforcement through a pressure roller;

[0039] (4) drying the product obtained in step (3) through the drying tunn...

Embodiment 1

[0066] The prepreg is prepared by using unidirectional carbon fiber reinforced PMR type 906 resin. Firstly, the 906 polyimide resin solution with a solid content of 50wt% is placed in the reaction axe. The temperature of the reaction kettle is set at 40°C. After 1.07, take out the resin glue and pour it into the glue tank, and use the double-roller meshing casting process to evenly coat the resin solution in the glue tank on the release paper, and adjust the gap between the two rolls to 0.37mm. The arranged carbon fiber tow is drawn to the top of the resin glue film under the tension of 260N, and the pressure of 0.05MPa is applied by the pressure roller to realize its impregnation, and then the prepreg is passed through the temperature at a uniform speed of 2.5m / min. Dry in a drying tunnel set at 70°C to remove excess solvent. After passing through the drying tunnel, the surface of the prepreg is covered with a film. The surface isolation film is pulled to the top of the prepre...

Embodiment 2

[0068] The prepreg is prepared by unidirectional carbon fiber reinforced PMR type 906 resin. Firstly, the 906 polyimide resin solution with a solid content of 50wt% is placed in the reaction axe. After 1.05, take out the resin glue and pour it into the glue tank, and use the double-roller meshing casting process to evenly coat the resin solution in the glue tank on the release paper, and adjust the gap between the two rolls to 0.38mm. The arranged carbon fiber tow is pulled to the top of the resin glue film under the tension of 260N, and the pressure of 0.05MPa is applied by the pressure roller to realize its impregnation, and then the prepreg is passed through the temperature setting at a uniform speed of 2m / min. Dry in a drying tunnel set at 70°C to remove excess solvent. After passing through the drying tunnel, the surface of the prepreg is covered with a film. The surface isolation film is pulled to the top of the prepreg under the action of a tension of 150N, and applied b...

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Abstract

The invention relates to a preparation method of polyimide prepreg, and belongs to the technical field of prepreg preparation. The method comprises the steps that proper resin solution viscosity is firstly contained through resin solution pretreatment, after release paper is coated with resin glue liquid through a tape casting process, a fiber enhancement body is paved, a pressure roller is utilized for achieving dipping of resin to the fiber enhancement body, then redundant volatile matter is removed through drying, and finally membrane coating and rolling are carried out. According to the preparation method, the technical problem about efficient impregnation of a low-viscosity polyimide resin solution is effectively solved by adopting the dual-roller engagement tape casting process, batched and stable preparation of the polyimide prepreg is achieved, and a good foundation is laid for engineering popularization and application of the polyimide prepreg.

Description

technical field [0001] The invention relates to a preparation method of polyimide prepreg, which belongs to the technical field of prepreg preparation. Background technique [0002] In the future, the flight Mach number of advanced high-speed missiles will continue to increase, endowing missiles with rapid response capabilities, strong penetration and high survivability, and can effectively strike high-value maneuvering targets and time-sensitive targets, which will play a very important role in future wars. High-speed missiles maneuvering in a dense atmosphere will experience more complex environments such as aerodynamic heat and large overload. Among them, the important components of missiles such as missile wings, air rudders, radome, and air inlets are in a harsh environment with low heat flow and long-term heating, and the surface temperature can reach above 300°C for a short time. Traditional epoxy composite materials, Shuangma composite materials have been unable to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C41/28B29B13/00B29C70/50B29C70/54
CPCB29B13/00B29B2013/002B29C41/28B29C70/504B29C70/54
Inventor 潘玲英崔超樊孟金赵伟栋孙宝岗孙宏杰蔡东旭
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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