Thermoplastic prepreg and preparation method thereof

A prepreg, thermoplastic technology, used in the field of composite material manufacturing, can solve the problems that hinder the rapid manufacture of composite material parts in a wide range of applications in the aerospace field, it is difficult to achieve close adhesion between layers, control the direction of fiber layup, and difficult to plastic deformation. and bending problems, to achieve the effect of improving stiffness, easy laying, and reducing force

Inactive Publication Date: 2018-05-11
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) Poor covering: thermoplastic resins are macromolecules with very long molecular chains entangled, agglomerated and crystallized. Below the Tg temperature, the molecular chains are in a glassy state, showing the high-strength and high-modulus properties of the material. Macroscopically, the resin cannot flow. It is difficult to plastically deform and bend, and self-bonding cannot be achieved. After the fiber is impregnated with resin, it needs to be heated and melted to form a prepreg, and the material obtained after heating and melting is relatively hard. , covering shape, it is difficult to achieve the requirements of near-clean prefabricated bodies such as close bonding between layers and controlling the direction of fiber laying. The general method is to use heating equipment to assist, and the process is cumbersome and difficult to achieve;
[0006] In summary, the shortcomings of existing thermoplastic prepregs and their preparation methods hinder the rapid manufacture of composite parts and their wide-scale application in the aerospace field.

Method used

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  • Thermoplastic prepreg and preparation method thereof
  • Thermoplastic prepreg and preparation method thereof
  • Thermoplastic prepreg and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, use the solution method to make the areal density to 135g / m 2 Carbon fiber is pre-impregnated with thermosetting resin polyimide, forming a continuous adhesive resin film on both sides of the carbon fiber; in the obtained material, the resin weight content is 10% of the carbon fiber, and the processing temperature is room temperature;

[0035] Step 2, at room temperature, evenly paint the PPS powder with a diameter of 20 μm on the surface of the thermosetting resin on both sides of the carbon fiber,

[0036] In step 3, the material obtained in step 2 is cold-pressed, coated, and rolled;

[0037] A structural example of the thermoplastic prepreg is shown in figure 1 shown.

[0038] During the preparation process of the prepreg, it only needs to be operated at room temperature and does not require high-temperature melting of thermoplastic resins, which not only reduces the energy consumption of the preparation, saves costs, but also prevents the performance of t...

Embodiment 2

[0040] Step 1, use the solution method to make the areal density 130g / m 2 Carbon fiber is pre-impregnated with thermosetting resin polyimide, forming a continuous adhesive resin film on both sides of the carbon fiber; in the obtained material, the resin weight content is 15% of the carbon fiber, and the processing temperature is room temperature;

[0041] Step 2, at room temperature, evenly paint PEEK powder with a diameter of 10 μm on the surface of the thermosetting resin on one side of the carbon fiber;

[0042] In step 3, the material obtained in step 2 is cold-pressed, coated, and rolled;

[0043] A structural example of the thermoplastic prepreg is shown in figure 2 shown.

[0044] During the preparation process of the prepreg, it only needs to be operated at room temperature and does not require high-temperature melting of thermoplastic resins, which not only reduces the energy consumption of the preparation, saves costs, but also prevents the performance of the resi...

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Abstract

The invention provides a thermoplastic prepreg and a preparation method thereof. The prepreg comprises continuous reinforcing fiber, thermosetting resin and thermoplastic resins, and is divided into four layers comprising a fiber layer, a thermosetting resin layer, a thermoplastic resin layer and a liner paper layer. The thermosetting resin layer is added in the thermoplastic prepreg to improve the bendability and conformability of the material, and is convenient for the overlay between layers of nearly-right-angle and high-curvature complex structural members, and the technical threshold foruse of the thermoplastic prepreg is reduced. The preparation method does not use a heat melting step, avoids the overheating and oxidation of resin, and provides a new solution for maintaining the stability of the thermoplastic prepreg.

Description

technical field [0001] The invention relates to a thermoplastic prepreg and a preparation method, belonging to the field of composite material manufacturing. Background technique [0002] Continuous fiber thermoplastic prepreg generally refers to the sheet material prepared by distributing or fully impregnating continuous fiber or fabric with thermoplastic resin in proportion through a special process, and then pre-pressing. It is one of the intermediate materials required for the preparation of thermoplastic composite materials. , when in use, the prepreg layer is stacked into the mold according to the designed layup form, the resin matrix is ​​softened and flowed by heating and melting, the mold is filled, cooled and consolidated into the expected thermoplastic composite material part, the continuous fiber thermoplastic prepreg The preparation methods are roughly divided into two categories: prepreg method and post prepreg method. The difference between the two is whether ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/10B32B27/12B32B37/08B32B38/08B32B9/00B32B9/04B32B27/28
CPCB32B5/02B32B9/007B32B9/045B32B27/10B32B27/12B32B27/288B32B37/08B32B38/08B32B2260/021B32B2260/046B32B2262/106
Inventor 毕向军许亚洪
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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