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

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
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] Step 1), processing and forming a CBT resin film with a thickness of 15μm; the specific operation is: heating CBT160 to 150°C for heat preservation, and after the CBT resin is completely melted, immediately pour the CBT glue on the spread release cloth and a layer density 260 g / m 2 The glass cloth mold is scraped at 150°C to form a film, and then the mold is immediately cut off and cooled, and the temperature is lowered to 110°C and demolded.

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

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

Example Embodiment

[0060] Example 2

[0061] Step 1), processing and forming a CBT resin film with a thickness of 300μm; the specific operation is: heating CBT160 to 170°C for heat preservation, after the CBT resin is completely melted, immediately pour the CBT glue on the spread release cloth and a layer density 260 g / m 2 The glass cloth mold is scraped at 150°C to form a film, and then the mold is immediately cut off and cooled, and the temperature is lowered to 110°C and demolded.

[0062] Step 2) Lay a mold release cloth, 8 layers of CBT resin film and 4 layers with a density of 630g / m on the mold coated with the release agent. 2 The glass fiber unidirectional cloth and release cloth, 2 layers of CBT resin film and 1 layer of glass fiber unidirectional cloth are laid in alternate interlayer form; that is, 2 layers of CBT resin film are laid on top of which 1 layer has a density of 630g / m 2 Glass fiber unidirectional cloth; spread the 3rd and 4th layer of CBT resin film on the upper surface of thi...

Example Embodiment

[0070] Example 3

[0071] Step 1), processing and forming a CBT resin film with a thickness of 380μm; the specific operation is: heating and melting CBT100 at 180°C, adding 0.1% mass fraction of chloromonobutyl stannic acid catalyst, fully stirring, and mixing uniformly. CBT resin mixed glue is poured on a mold release cloth and a layer with a density of 400g / m 2 On the forming mold of the glass fiber mat, at 180°C, it is scraped into a film, and then the forming mold is immediately cut off and cooled, and the temperature is lowered to 110°C and demolded to complete the processing of the CBT resin film.

[0072] Step 2) Spread the first layer of release cloth, 12 layers of CBT resin film and 4 layers of mold release agent with a density of 630g / m 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 alternate interlayers to form an impregnat...

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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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