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Resin membrane melt impregnation forming method of fiber reinforced PBT composite material

A fiber-reinforced material and melt impregnation technology, which is applied in the field of composite materials, can solve the problems of high molding temperature and molding pressure, strict mold equipment requirements, and high production costs, and achieve low heat resistance requirements, reduce production costs, and facilitate operation Effect

Active Publication Date: 2012-07-11
中材科技(邯郸)风电叶片有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these molding processes use thermoplastic prepreg tape, the molding temperature and molding pressure are high, the energy consumption is high, and the requirements for mold equipment are relatively strict, so the production cost is high, especially in the large-scale manufacturing of large components.

Method used

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  • Resin membrane melt impregnation forming method of fiber reinforced PBT composite material
  • Resin membrane melt impregnation forming method of fiber reinforced PBT composite material
  • Resin membrane melt impregnation forming method of fiber reinforced PBT composite material

Examples

Experimental program
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Effect test

example 1

[0051] Step 1), process and form a CBT resin film with a thickness of 15 μm; the specific operation is: heat CBT160 to 150°C and keep it warm. After the CBT resin is completely melted, immediately pour the CBT glue on the laid release cloth and a layer of density 260 g / m 2 On the glass cloth mold, scrape it into a film at 150°C, then immediately turn off the power to cool the mold, and lower the temperature to below 110°C to release the mold.

[0052] Step 2), lay the first layer of release cloth, 20 layers of CBT resin film formed in step 1) on the mold coated with release agent, and the density of the second layer is 630g / m 2 The glass fiber unidirectional cloth and the second layer of release cloth; the CBT resin film and the glass fiber unidirectional cloth are laid sequentially and combined to form an impregnated layer. The dimensions of the CBT resin film and the glass fiber unidirectional cloth are both 350mm×450mm.

[0053] Step 3), heating the component obtained in s...

example 2

[0061] Step 1), process and form a CBT resin film with a thickness of 300μm; the specific operation is: heat CBT160 to 170°C and keep it warm. After the CBT resin is completely melted, immediately pour the CBT glue on the laid release cloth and a layer of density 260 g / m 2 On the glass cloth mold, scrape it into a film at 150°C, then immediately turn off the power to cool the mold, and lower the temperature to below 110°C to release the mold.

[0062] Step 2), spread release cloth, 8 layers of CBT resin film and 4 layers of density of 630g / m on the mold coated with release agent in sequence 2 Glass fiber unidirectional cloth and release cloth, 2 layers of CBT resin film and 1 layer of glass fiber unidirectional cloth are laid alternately in the form of sandwich; that is, 2 layers of CBT resin film are laid, and the density of 1 layer on top is 630g / m 2 The glass fiber unidirectional cloth; lay the third and fourth layers of CBT resin film on the surface of the glass fiber uni...

example 3

[0071] Step 1), process and form a CBT resin film with a thickness of 380 μm; the specific operation is: heat and melt CBT100 at 180°C, add 0.1% chloromonobutyl stannic acid catalyst with a mass fraction of 0.1%, stir well, and immediately mix the obtained CBT resin mixed glue is poured on a layer of release cloth and a layer density of 400g / m 2 On the forming mold of the glass fiber felt, scrape it into a film at 180°C, then immediately turn off the power to cool the forming mold, lower the temperature to below 110°C and demould, and complete the processing of the above-mentioned CBT resin film.

[0072] Step 2) Lay the first layer of release cloth, 12 layers of CBT resin film and 4 layers with a density of 630g / m on the mold coated with the release agent from bottom to top 2 The glass fiber unidirectional cloth and the second layer of release cloth; among them, 3 layers of CBT resin film and 1 layer of glass fiber unidirectional cloth are laid in the form of alternate interl...

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Abstract

The invention discloses a resin membrane melt impregnation forming method of a fiber reinforced polyethylene terephthalate (PBT) composite material, comprising the following steps: 1) processing to form a cyclic butylenes terephthalate(CBT) resin membrane with the thickness of 15-700 mu m; 2) successively placing a demolding cloth, the CBT resin membrane, a fiber reinforced material and a demolding cloth on a mold; 3) heating up the assembly obtained by the step 2) to 180-225 DEG C under vacuum and preserving the heat for 5 min-6 h to melt the CBT resin in the CBT resin membrane and completely impregnate the fiber reinforced material, simultaneously polymerizing the CBT resin into PBT with high molecular weight, cooling, and then demolding. According to the invention, the forming method has no need to prepare a prepreg, the forming process can be realized at the temperature which is lower than the PBT melting temperature, the process is simple and easy to operate, the efficiency is high, and large members can be formed. The invention is beneficial for popularization and application.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a resin film melt impregnation molding method for fiber-reinforced PBT composite materials. Background technique [0002] Compared with thermosetting composite materials, thermoplastic composite materials have obvious advantages such as environmental friendliness, short processing cycle and recyclability, and can have better comprehensive properties, such as: light weight, good impact resistance, high damage tolerance, specific strength It has the characteristics of high specific rigidity, multiple molding, plastic repair and welding. With the development of new technologies, the performance of thermoplastic composite materials has been continuously optimized and improved, and the application fields have been continuously expanded. Among many thermoplastic resin matrices, polybutylene terephthalate (abbreviation: PBT) is an engineering plastic with excellent comprehe...

Claims

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Application Information

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IPC IPC(8): B29C70/36
Inventor 牟书香黄再满陈淳邱桂杰杜微
Owner 中材科技(邯郸)风电叶片有限公司
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