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Flexible electromagnetic wave shielding and absorbing cloth and production method thereof

A technology for shielding absorption and electromagnetic waves, applied in the field of fiber absorbing materials, can solve problems such as difficulty in taking into account waterproof, flame retardant and other properties, limit the practical application of absorbing materials, and single absorption band, etc., and achieve easy mass production and light weight. , good flexibility

Inactive Publication Date: 2016-11-09
山东天磁新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing absorbing materials have shortcomings such as narrow absorption frequency band, single absorption band, high density, large thickness, and easy oxidation, and when used in special places, it is difficult to take into account waterproof and flame-retardant properties, which limits the practical application of absorbing materials

Method used

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  • Flexible electromagnetic wave shielding and absorbing cloth and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Dry the nylon fiber fabric at 100°C for 24 hours to reduce its moisture content;

[0031] 2), the nylon fiber fabric described in step 1 is treated with an ion source for 40min, to improve its binding force with the plated metal;

[0032] 3), the nylon fiber fabric described in step 2 is vacuum-deposited a layer of 3 μm thick nickel;

[0033] 4), scrape-coat the nylon fiber fabric of the nickel-plated layer described in step 3 with a wave-absorbing coating with a thickness of 100 μm, wherein the wave-absorbing coating uses 10nm flake ferrite as the absorbent, and water-based polyurethane resin as the base material to absorb The mass ratio of agent to substrate is 60:40, prepared by high-speed dispersion;

[0034] 5), scrape the nylon fiber fabric of the wave-absorbing layer described in step 4 and apply a layer of flame-retardant waterproof coating with a thickness of 10 μm, wherein the flame-retardant waterproof coating uses magnesium hydroxide as a flame retardant...

Embodiment 2

[0039] 1) Dry the polyimide fabric at 80°C for 48 hours to reduce its water content;

[0040] 2), adopt corona treatment 20min with the polyimide fiber fabric described in step 1, to improve its binding force with the plated metal;

[0041] 3), physical vapor deposition of a layer of 0.5 μm thick copper and 2 μm thick silver on the polyimide fiber fabric described in step 2;

[0042]4), spray the polyimide fiber fabric with the nickel-plated layer described in step 3 with a layer of wave-absorbing coating with a thickness of 50 μm, wherein the wave-absorbing coating uses 100nm fibrous metal powder as the absorbent, and water-based epoxy resin as the base material , the mass ratio of absorbent to substrate is 90:10, prepared by high-speed dispersion;

[0043] 5), the polyimide fiber fabric of spraying wave-absorbing layer described in step 4 is scraped and coated with a layer of flame-retardant waterproof coating with a thickness of 5 μm, wherein the flame-retardant waterproof...

Embodiment 3

[0048] 1) Dry the acrylic fiber fabric at 60°C for 36 hours to reduce its water content;

[0049] 2), the acrylic fiber fabric described in step 1 is treated with plasma for 60min, to improve its binding force with the metal plating;

[0050] 3), the acrylic fiber fabric described in step 2 is chemically plated with 5 μm thick silver;

[0051] 4), dip-coat the acrylic fiber fabric of the nickel-plated layer described in step 3 with a layer of wave-absorbing coating with a thickness of 300 μm, wherein the wave-absorbing coating is an absorbent with a mixture of 1 μm spherical alloy powder and 500 nm flake carbon black, and water-based acrylic acid Resin is the substrate, and the mass ratio of absorbent to substrate is 40:60, which is prepared by high-speed dispersion; the mass ratio of spherical alloy powder and flake carbon black is 30:70;

[0052] 5), the acrylic fiber fabric that is dip-coated with the wave-absorbing layer described in step 4 is sprayed with a flame-retarda...

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Abstract

The invention discloses a flexible electromagnetic wave shielding and absorbing cloth and a production method thereof. The flexible electromagnetic wave shielding and absorbing cloth comprises a four-layer structure which sequentially comprises a chemical fiber fabric layer, an electromagnetic wave shielding layer, an electromagnetic wave absorbing layer and a flame-retardant and waterproof layer from bottom to top. The production method of the flexible electromagnetic wave shielding and absorbing cloth comprises the following steps: 1, drying the chemical fiber fabric; 2, preprocessing the chemical fiber fabric obtained in step 1; 3, plating the chemical fiber fabric obtained in step 2 with a layer of meta; 4, coating the metal layer plated chemical fiber fabric obtained in step 3 with a layer of a wave absorbing coating; and 5, coating the wave absorbing layer coated chemical fiber fabric obtained in step 4 with a layer of a flame-retardant and waterproof coating. The electromagnetic wave shielding and absorbing cloth has the advantages of wide wave absorption frequency band, high absorption intensity, flame retardation and waterproofing property, good flexibility, light weight and thin thickness, and can be applied to electromagnetic interference and electron strike prevention in the fields of electronic products and military devices.

Description

technical field [0001] The invention relates to a fiber wave-absorbing material, in particular to a flexible electromagnetic wave shielding absorbing cloth and a preparation method thereof. Background technique [0002] With the rapid development of the modern electronic industry, the application of electromagnetic waves in wireless communication and other fields has penetrated into everyone's life. In order to improve the transmission speed of signals, the frequency of use is still increasing. Satellites transmit and receive electromagnetic waves to the ground through antennas, and the information exchange between mobile phones and base stations is done through electromagnetic waves to complete the transmission of audio, video and various digital signals. In addition, the changing electromagnetic fields of various electronic products can generate electromagnetic waves, which radiate a large number of electromagnetic waves of different wavelengths and frequencies into the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/44D06M11/45D06M11/47D06M11/49D06M11/74D06M11/83D06M15/263D06M15/55D06M15/564D06M101/28D06M101/30D06M101/34
CPCD06M11/83D06M11/44D06M11/45D06M11/47D06M11/49D06M11/74D06M15/263D06M15/55D06M15/564D06M2101/28D06M2101/30D06M2101/34
Inventor 朱焰焰郑杰刘久荣
Owner 山东天磁新材料科技有限公司
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