A preparation method of thermoplastic resin fiber unidirectional tape toughened unidirectional prepreg

A technology of thermoplastic resin and unidirectional tape, which is applied in the field of composite material prepreg preparation, can solve the problems affecting the process performance of composite materials, cumbersome process, and poor paving performance, so as to facilitate large-scale production and improve preparation efficiency , good glue penetration performance

Active Publication Date: 2016-03-23
AVIC COMPOSITES
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Interlayer toughening technology can greatly improve the toughness of composite materials. The key lies in the selection of interlayer toughening materials. With the advancement of technology, various forms of interlayer toughening materials have been developed. Tough materials are the most widely used, but there are still many problems in the form of interlayer toughening of film structures, such as thermoplastic films will limit the removal of air bubbles during composite molding, and the redistribution of resin between layers.
Moreover, the traditional interlayer toughening method is to use the toughening material as an independent individual, and insert it into the reinforcing material layer by manual laying and other methods. The process is cumbersome and the efficiency is low, and the toughening material is mainly thermoplastic resin. Composition, paveability is poor, which seriously affects the process performance in the process of composite material preparation

Method used

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  • A preparation method of thermoplastic resin fiber unidirectional tape toughened unidirectional prepreg
  • A preparation method of thermoplastic resin fiber unidirectional tape toughened unidirectional prepreg

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preparation example Construction

[0022] A preparation method of thermoplastic resin fiber unidirectional tape toughened prepreg, the specific steps are as follows:

[0023] (1) According to the surface density requirements of the prepreg, arrange and unfold each bundle of reinforcing fibers drawn from the reinforcing fiber tow frame on the prepreg machine to form a reinforcing fiber unidirectional belt 1;

[0024] (2) Introduce the thermoplastic fiber tow above the reinforcing fiber of the prepreg machine, and spread it evenly to form a thermoplastic resin fiber unidirectional belt 2, and the surface density of the thermoplastic fiber unidirectional belt 2 is controlled at 10g / m 2 ~40g / m 2 , the thermoplastic fiber unidirectional belt 2 is equal in width to the reinforced fiber unidirectional belt 1, and aligned left and right, the thermoplastic fiber unidirectional belt 2 is located directly above the reinforced fiber unidirectional belt 1, and there is a gap between them;

[0025] (3) A threading device is...

Embodiment 1

[0029] Polyamide PA6 unidirectional fiber is selected as the toughening material, the average diameter of the fiber is about 5 μm, and CCF300 carbon fiber is used as the reinforcing material. After the CCF300 carbon fiber arrangement is completed, the PA6 fiber unidirectional tape is introduced to the surface of the CCF300 carbon fiber, and the surface density of the PA6 fiber unidirectional tape is controlled at 10g / m 2 . Every 25mm, the threading device crosses a bunch of PA6 fiber tows between the CCF300 carbon fiber unidirectional belt and the PA6 fiber unidirectional belt to prevent the PA6 fiber from being embedded in the carbon fiber and affecting the toughening effect. Then, the epoxy resin-based prepreg film is combined with PA6 fiber and CCF300 carbon fiber through a hot pressing roller to prepare a high-toughness prepreg product with PA6 fiber unidirectional tape toughening. After the release paper on the upper surface of the prepreg is peeled off and covered with ...

Embodiment 2

[0031] Polyethersulfone PES unidirectional fiber is selected as the toughening material, the average diameter of the fiber is about 15 μm, and T700 carbon fiber is used as the reinforcing material. After the T700 carbon fiber arrangement is completed, introduce the PES fiber unidirectional tape to the surface of the T700 carbon fiber, and the surface density of the PES fiber unidirectional tape is controlled at 10g / m 2 . Every 100mm, the threading device crosses a bunch of PES fiber tows between the T700 carbon fiber unidirectional belt and the PES fiber unidirectional belt to prevent the PES fiber from being embedded in the carbon fiber and affecting the toughening effect. Then, the epoxy resin-based prepreg film is combined with PES fiber and T700 carbon fiber through a hot pressing roller to prepare a high-toughness prepreg product with PES fiber unidirectional tape toughening. After the release paper on the upper surface of the prepreg is peeled off and covered with polye...

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Abstract

The invention belongs to the field of preparation of a composite material prepreg, and relates to a preparation method of a thermoplastic resin fiber one-way belt toughened one-way prepreg. In an arrangement process of the prepreg toughening fibers, the thermoplastic fibers are introduced into the surface of the toughening fibers, and then a prepreg resin adhesive film, the thermoplastic fiber one-way belt and the toughening fiber one-way belt are compounded by a hot-pressing roller, thus obtaining a high-toughness thermoplastic resin fiber one-way belt toughened prepreg product. The technological process is easy and convenient to realize; furthermore, the continuous production of the high-toughness prepreg can be realized, and the production efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the field of composite material prepreg preparation, and relates to a preparation method of thermoplastic resin fiber unidirectional tape toughened unidirectional prepreg. Background technique [0002] Fiber-reinforced resin-based composites have become the first choice after aluminum alloys, steels, and titanium alloys due to their high specific strength, high specific stiffness, good fatigue fracture resistance, strong structural designability, and superior environmental resistance. Four major aerospace structural materials. In the aviation industry, composite materials, especially carbon fiber composite materials, have long been used in large quantities for secondary load-bearing parts, and are currently occupying an increasing proportion in main load-bearing parts such as wings and fuselages of aircraft. This puts forward requirements for the damage tolerance of composite materials, especially for the problem of insufficie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B15/08
Inventor 包建文张代军钟翔屿张尧州陈祥宝
Owner AVIC COMPOSITES
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