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Carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as preparation method and application

A technology of sheet molding compound and carbon fiber, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of stripping and delamination of conductive layers, and achieve the effects of decreased resistivity, obvious shielding effect, and excellent process performance

Inactive Publication Date: 2012-09-19
江苏兆新材料科技
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surface coating and surface spraying have been widely used, but these conductive layers are prone to peeling and delamination after years of application

Method used

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  • Carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as preparation method and application
  • Carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as preparation method and application
  • Carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A high-strength carbon fiber reinforced sheet molding compound with excellent electromagnetic wave shielding performance. The sheet molding compound contains the following components in weight fraction ratio: matrix resin 60, carbon fiber 60, low shrinkage agent 35, wave absorbing agent 5, inorganic mineral filler 180, curing agent 2, thickener 2, mold release agent 4; wherein: matrix resin is epoxy vinyl resin; carbon fiber is carbon fiber without graphitization treatment; low shrinkage agent is PVAc; wave absorbing agent is ferrite; inorganic mineral The filler is aluminum hydroxide; the curing agent is TBPB or a composite initiation system of TBPB and TBPO, wherein the weight ratio of TBPB / TBPO is 0.7 / 0.3; the thickener is magnesium oxide; the release agent is zinc stearate.

[0020] Put the above-mentioned epoxy vinyl resin, low shrinkage agent, wave-absorbing agent, inorganic mineral filler, release agent, and curing agent into the high-speed shear mixer accordi...

Embodiment 2

[0025] A high-strength carbon fiber reinforced sheet molding compound with excellent electromagnetic wave shielding performance. The sheet molding compound contains the following components in weight fraction ratio: matrix resin 60, carbon fiber 80, low shrinkage agent 35, wave absorbing agent 8, inorganic mineral filler 180, curing agent 2, thickener 2, mold release agent 4; wherein: matrix resin is epoxy vinyl resin; carbon fiber is carbon fiber without graphitization treatment; low shrinkage agent is PVAc; wave absorbing agent is ferrite; inorganic mineral The filler is aluminum hydroxide; the curing agent is TBPB or a composite initiation system of TBPB and TBPO, wherein the weight ratio of TBPB / TBPO is 0.7 / 0.3; the thickener is magnesium oxide; the release agent is zinc stearate.

[0026] Put the above-mentioned epoxy vinyl resin, low shrinkage agent, wave-absorbing agent, inorganic mineral filler, release agent, and curing agent into the high-speed shear mixer accordi...

Embodiment 3

[0035] Compared with Example 1, Example 3 differs only in components. A high-strength carbon fiber reinforced sheet molding compound with excellent electromagnetic wave shielding performance. The sheet molding compound contains the following components in weight fraction ratio: matrix resin 80, carbon fiber 30, low shrinkage agent 30, wave absorbing agent 2, inorganic mineral filler 130, curing Agent 1, Thickener 1, Release Agent 2.

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Abstract

The invention discloses a carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as a preparation method and application. The flaky moulding material contains the following components according to parts by weight: 60 to 100 of matrix resin, 30 to 100 of carbon fibre, 30 to 50 of low shrinking agent, 2 to 10 of wave absorbing agent, 130 to 230 of inorganic mineral filler, 1 to 4 of curing agent, 1 to 5 of thickening agent and 2 to 10 of other components; and the carbon fibre is carbon fibre which is not treated by graphitization, and acts as the function of absorbing electromagnetic waves in the compound material. The flaky moulding material has excellent electromagnetic wave shielding performance and mechanical performance and can be used for the fields of electronic equipment, traffic, military affairs and the like. The carbon fibre-reinforced flaky moulding material for shielding the electromagnetic waves is used as materials, such as a wave absorbing material, a battery case of an electric automobile with a novel energy resource, and an invisible material.

Description

technical field [0001] The invention relates to the field of electromagnetic wave shielding materials, in particular to an electromagnetic wave shielding carbon fiber reinforced sheet molding compound, its preparation method and application. Background technique [0002] Electromagnetic shielding materials mainly have two functions, one is to protect electronic circuits from the interference of external electromagnetic waves, and the other is to prevent internally generated interference waves from being emitted to the outside, that is, to isolate internal and external electromagnetic waves. The research on electromagnetic shielding materials is a relatively active field today, and various new materials are developing towards the direction of high shielding efficiency and light weight. A large number of plastics replace metal materials as the main material of the shell, and the electromagnetic shielding performance of the plastic shell must be increased. Carbon fiber is ...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L63/10C08K13/04C08K7/06C08K3/08C08K3/22C08K3/04B29C70/28C09K3/00
Inventor 鲁平才阮诗平
Owner 江苏兆新材料科技
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