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Preparation method and product of fiber reinforced fluororesin composite membrane material

A composite membrane material and fiber-reinforced technology, which is applied in the field of fiber-reinforced fluororesin composite membrane products and the field of preparation of fiber-reinforced fluororesin composite membrane materials, can solve the problems of limited production process and performance without clear articles, etc. Achieve broad application prospects, excellent wave-transmitting performance, and improved compactness

Active Publication Date: 2019-01-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, domestic research on glass fiber reinforced PTFE is relatively limited, and there are no clear articles on the production process and performance of the material. Some units have successfully produced PTFE glass varnished laminates, but they can only be used as insulating materials for electrical appliances.

Method used

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  • Preparation method and product of fiber reinforced fluororesin composite membrane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of fiber-reinforced fluororesin composite membrane material, such as figure 1 shown, including the following steps:

[0029] 1) Surface modification of glass fiber cloth: treat the low-dielectric glass fiber cloth at 120° C. for 2 hours at high temperature, and cool to room temperature naturally; then put a silane coupling agent (KH-570 silane coupling agent) with a concentration of 1 wt % ) after soaking in the ethanol solution for 2 hours, take it out and put it into a vacuum oven to dry at 80°C for 4 hours to obtain a surface-modified glass fiber cloth;

[0030] 2) Immerse the surface-modified glass fiber cloth into a polytetrafluoroethylene dispersion water emulsion with a concentration of 40wt%, let it stand for 5 minutes, take out the impregnated glass fiber cloth and put it in an oven to dry at 100°C for 2 hours; The steps of immersion and drying are repeated until the weight content of PTFE resin in the dried film material reaches 50%.

[...

Embodiment 2

[0035] A method for preparing a fiber-reinforced fluororesin composite membrane, comprising the following steps:

[0036] 1) Surface modification of glass fiber cloth: treat the high-silica glass fiber cloth at 180°C for 1 hour, and cool it down to room temperature naturally; then put in 2 wt% silane coupling agent (KH550 silane coupling agent) ethanol After soaking in the solution for 1 hour, take it out and put it in a vacuum oven to dry at 80°C for 2 hours to obtain a surface-modified glass fiber cloth;

[0037] 2) Immerse the surface-modified glass fiber cloth into a polytetrafluoroethylene dispersion water emulsion with a concentration of 60wt%, let it stand for 10 minutes, take out the impregnated glass fiber cloth and put it in an oven and dry it at 200°C for 1 hour . Repeat the steps of immersion and drying until the weight content of PTFE resin reaches 70% in the dried composite film;

[0038]3) Arrange the glass fibers treated in step 3) between the two flat molds ...

Embodiment 3

[0042] A method for preparing a fiber-reinforced fluororesin composite membrane, comprising the following steps:

[0043] 1) Surface modification of glass fiber cloth: treat glass fiber (alkali-free glass fiber cloth) at a temperature of 300° C. for 1 hour, and cool to room temperature naturally; put the treated glass fiber into WD with a concentration of 0.5 wt % After soaking in the ethanol solution of -21 type silane coupling agent for 2 hours, take it out and dry it in a vacuum oven at 80°C for 1 hour to obtain a surface-modified glass fiber cloth;

[0044] 2) Immerse the surface-modified glass fiber cloth into a polytetrafluoroethylene dispersion water emulsion with a concentration of 20wt%, let it stand for 20 minutes, take out the impregnated glass fiber cloth and put it in an oven to dry at 150°C for 2 hours ; Repeat the immersion and drying steps until the weight content of PTFE resin in the dried composite film material reaches 30%;

[0045] 3) Arrange the glass fib...

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Abstract

The invention discloses a fiber reinforced fluororesin composite membrane material and a preparation method thereof. Polytetrafluoroethylene resin is selected as a main matrix material of the composite material, and a glass fiber cloth is selected as a reinforcing material. Surface modification is carried out on glass fibers by using a coupling agent, then immersion enhancing modification is carried out, and finally the composite material is obtained, wherein properties such as wear resistance, chemical resistance, tensile strength, water absorption rate, wave-transmitting performance and thelike of the obtained material are far superior to the properties of same-type membrane materials in China. Therefore, the composite membrane material provided by the invention has a wide application prospect in the fields of electronic communication, aerospace, military radars and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a preparation method of a fiber-reinforced fluororesin composite membrane, and also relates to a fiber-reinforced fluororesin composite membrane product obtained by the preparation method. Background technique [0002] Wave-transparent composite membrane material refers to a type of composite material that can transmit electromagnetic waves within a specified frequency range and has multiple functions such as wave transmission, heat insulation, and load bearing. When the electromagnetic wave encounters a certain material medium in the process of propagation, if the transmitted intensity is greater than a certain limit (>95%), the material can be used as a high wave-transmitting material. The main function of the wave-transparent composite material has two aspects: firstly, it must ensure the high wave-transparency of the material and reduce unne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L79/04C08L63/00C08K9/06C08K7/14C08J5/18
CPCC08J5/18C08J2327/18C08J2463/00C08J2479/04C08K7/14C08K9/06
Inventor 付鹏崔喆刘民英赵清香刘源杜详建
Owner ZHENGZHOU UNIV
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