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Electromagnetic wave-shielding plastic

A technology of electromagnetic waves and plastics, applied in the direction of reagents, products, educts, etc., can solve the problems of conductive plastic mechanical strength and adverse effects on molding and processing performance, and achieve low resistivity and prevent electromagnetic waves from leaking out

Inactive Publication Date: 2012-06-27
费近峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carbon fiber has the inherent characteristics of carbon materials and the conductivity of metal materials, to make conductive plastics have a good conductive effect, it is necessary to add conductive carbon fibers with a higher filling amount, which will have a negative impact on the mechanical strength and molding performance of conductive plastics. Negative Effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The electromagnetic wave shielding plastic is characterized in that it is composed of 66 to 70 parts by mass of nylon, 50 parts of nickel-plated carbon fiber, 10 parts of carbon fiber, 20 parts of aluminum powder, and 20 parts of graphite powder.

[0015] According to the above formula, the nickel-plated carbon fiber was added to nylon 66 for mixing, and then the remaining materials were added to the temperature at 120 degrees Celsius for 2 hours.

[0016] Compared with commercially available products, the electromagnetic wave shielding plastic provided by the present invention can be used in the housing of communication equipment to prevent electromagnetic waves from leaking. The resistivity of the material is low, and the electromagnetic wave isolation and shielding effect can reach 40dB.

[0017]

Embodiment 2

[0019] The electromagnetic wave shielding plastic is characterized in that it is composed of 66 parts by mass of nylon 66, 65 parts of nickel-plated carbon fiber, 15 parts of carbon fiber, 20 parts of aluminum powder, and 10 parts of graphite powder.

[0020] According to the above formula, add nickel-plated carbon fiber to nylon 66 for mixing, and then add the remaining materials to 120 degrees Celsius for 3 hours.

[0021] Compared with commercially available products, the electromagnetic wave shielding plastic provided by the present invention can be used in a microwave oven shell to prevent electromagnetic waves from leaking. The resistivity of the material is low, and the electromagnetic wave isolation and shielding effect can reach 60dB.

[0022]

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Abstract

The invention discloses electromagnetic wave-shielding plastic. The electromagnetic wave-shielding plastic comprises: by mass, 60 to 70 parts of nylon 66, 30 to 50 parts of nickel-coated carbon fibers, 10 to 15 parts of carbon fibers, 15 to 20 parts of aluminum powder and 10 to 20 parts of graphite powder. The electromagnetic wave-shielding plastic can be utilized as a material of an electronic product housing and for preventing electromagnetic wave leakage. The electromagnetic wave-shielding plastic has low electrical resistivity and an electromagnetic wave shielding effect of 35 to 60dB.

Description

[0001] technical field [0002] The invention belongs to the technical field of conductive plastics, in particular to a plastic for shielding electromagnetic waves. [0003] Background technique [0004] Carbon fiber is a high-strength, high-modulus high-strength material. It not only has electrical conductivity, but also has good overall performance. Compared with other conductive fillers, it has the advantages of low density, good mechanical properties, and long-lasting material conductivity. The electromagnetic shielding performance of carbon fiber mainly comes from its good electrical conductivity, and its electrical conductivity increases with the increase of heat treatment temperature. Therefore, the conductivity of the carbon fiber obtained by high temperature treatment has gradually approached that of the conductor, and it has high electromagnetic shielding performance. The shielding effectiveness can reach 37 dB at 500 MHz. Although carbon fiber has the inherent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/06C08K9/02C08K7/06C08K3/08C08K3/04
CPCY02P20/141
Inventor 费近峰
Owner 费近峰