Lightweight shielding square cabinet wall plate with radar stealth function, and a preparation method thereof

A radar stealth and bulkhead panel technology, which is applied to chemical instruments and methods, protective equipment, offensive equipment, etc., can solve the problems of large radar reflection cross-section area and obvious target characteristics in the shelter, and achieve light weight and high shielding performance Effect

Inactive Publication Date: 2018-07-13
ZHEJIANG SAINTYEAR ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional electromagnetic shielding shelter wall panels are generally composed of aluminum alloy plates as the inner and outer panels and low-density polyurethan

Method used

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Examples

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preparation example Construction

[0042] The present invention provides a method for preparing a lightweight shielding shelter panel with radar stealth function described in the above technical solution, comprising the following steps:

[0043] The wave-absorbing honeycomb sandwich layer, the first panel layer and the second panel layer are bonded to obtain a lightweight shielding shelter panel with radar stealth function;

[0044] The wave-absorbing honeycomb sandwich layer includes a honeycomb support skeleton and a wave-absorbing layer covering the surface of the skeleton;

[0045] Both the first panel layer and the second panel layer include a multi-layer metallized fiber fabric whose surface is coated with a wave-absorbing material.

[0046] In the present invention, the wave-absorbing honeycomb sandwich layer is preferably prepared according to the following method:

[0047] The fiber raw paper coated with a wave-absorbing layer on the surface is glued, laminated, hot-pressed, stretched, dipped and cure...

Embodiment 1

[0068] (1) Copper and nickel are plated on the surface of carbon fiber filaments by electroless plating process, the thickness of the copper plating layer is 2 μm, and the thickness of the nickel layer is 0.5 μm;

[0069] (2) Each bundle containing 1000 carbon fiber filaments is bidirectionally alternately woven into a plain weave bidirectional 1K carbon fiber fabric;

[0070] (3) Coating wave-absorbing paint on the surface of the above-mentioned carbon fiber fabric, the thickness of the coating is 5 μm; wherein the wave-absorbing paint is composed of iron, nickel, carbon black powder as wave absorbing agent and water-based polyurethane resin, the wave absorbing agent and resin The mass ratio is 45:55;

[0071] (4) Prepare the carbon fiber prepreg by impregnating the carbon fiber fabric in step (3) with epoxy resin, then spread the carbon fiber prepreg on the flat mold by hand lay-up process, and cure at a temperature of 130°C and a time of 90 minutes Demoulding after forming...

Embodiment 2

[0077] (1) The surface of the aramid twill fabric is coated with conductive silver paste and absorbing material by coating process to prepare conductive coating and absorbing coating; wherein the conductive silver paste is a commercially available product with a silver content of 60%, and the thickness of the coating is 5 microns, the absorbing material is made of iron-silicon aluminum alloy powder as the absorbing agent and water-based acrylic acid; the thickness of the absorbing layer is 8 microns;

[0078] (2) Impregnate the aramid fabric in step (1) with polytetrafluoroethylene resin to form a prepreg and use a lamination molding process to obtain the required first panel and second panel. The curing temperature is 120 °C and the time is uniform. 30min, the thickness of the first panel and the second panel are both 1.2mm;

[0079] (3) Immerse the polyurethane rigid foam board in the wave-absorbing glue (the wave-absorbing glue includes components: ferrite, ferrosilicon alu...

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Abstract

The invention provides a lightweight shielding square cabinet wall plate with a radar stealth function, and a preparation method thereof. The square cabinet wall plate comprises a wave absorbing honeycomb sandwich layer, a first surface plate layer and a second surface plate layer, wherein the first surface plate layer and the second surface plate layer are arranged on the upper side and the lowerside of the wave absorbing honeycomb sandwich layer, the wave absorbing honeycomb sandwich layer comprises a honeycomb type support skeleton and a wave absorbing layer covering the surface of the skeleton, and the first surface plate layer and the second surface plate layer respectively comprise a multi-layer metalized fiber fabric coated with a wave absorbing material on the surface. According to the present invention, by arranging the surface metalized fiber fabric and the wave absorbing material layer in the surface plate layers of the cabinet wall plate, the cabinet wall plate has the radar stealth function and the high shielding performance; by using the surface plate layer prepared with the surface metalized fiber fabric to replace the metal surface plate, such that the weight is light; and the shielding performance of the square cabinet wall plate is greater than 60 dB at 20 MHz-1.5 GHz, and the average absorption performance of the square cabinet wall plate at 8-18 GHz, 26.5-40 GHz and 90-110 GHz exceeds 10 dB.

Description

technical field [0001] The invention relates to the technical field of shelter panels, in particular to a lightweight shielding shelter panel with a radar stealth function and a preparation method thereof. Background technique [0002] With its good protection performance, airtight performance and transportation flexibility, the shelter is widely used in weapon systems, command centers, electronic countermeasures, field service and medical support systems, and electromagnetic shielding provides guarantee for the smooth completion of tasks of the shelter. [0003] The traditional electromagnetic shielding shelter wall panels are generally composed of aluminum alloy plates as the inner and outer panels and low-density polyurethane rigid foam boards. The shelter made of this structure has a large radar reflection cross-sectional area, obvious target characteristics, and is easy to be detected by radar . Therefore, it is necessary to provide a radar stealth shelter with a small...

Claims

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Application Information

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IPC IPC(8): B32B3/12B32B9/00B32B9/06B32B29/06B32B29/02B32B27/34B32B27/40B32B27/08B32B27/12B32B9/04B32B17/02B32B17/12B32B27/04B32B27/28B32B37/12B32B37/06B32B37/10B32B37/14B32B33/00B32B7/12B32B37/24B32B38/08F41H3/00
CPCB32B3/12B32B5/026B32B5/18B32B5/26B32B7/12B32B9/007B32B9/047B32B9/06B32B17/067B32B27/08B32B27/12B32B27/281B32B27/34B32B27/40B32B29/02B32B29/06B32B33/00B32B37/06B32B37/10B32B37/12B32B37/146B32B37/24B32B38/08B32B2037/243B32B2255/02B32B2255/12B32B2255/20B32B2255/205B32B2255/26B32B2260/021B32B2260/046B32B2262/00B32B2262/101B32B2262/106B32B2307/212B32B2307/718B32B2571/00F41H3/00
Inventor 刘学超董庆文
Owner ZHEJIANG SAINTYEAR ELECTRONICS TECH
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