Multilayer-structure radar wave-absorbing cloth and preparation method thereof

A multi-layer structure, radar technology, used in coatings, radiation-absorbing coatings, film/flake adhesives, etc. Cost investment and other issues, to achieve the effect of excellent absorbing ability, low cost and reducing interference

Inactive Publication Date: 2014-09-10
江阴市诺科生物新材料科技有限公司
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

(2) Wide frequency band, low reflectivity
On the one hand, due to the poor stability and corrosion resistance of the coating, the electromagnetic wave absorption effect of the material obtained by this method cannot last long, and it needs to be recoated frequently to obtain the ideal wave absorption effect, which consumes a lot of manpower and material resources, and improves the overall production. Costs are invested in the use process; on the other hand, some stealth equipment for field operations, such as gun cover, tank cover, car canvas, camping tent, camouflage net, etc., also have the performance of waterproof, flame retardant, and breathable, these conditions are limited The practical application of the wave-absorbing film in the field of military equipment

Method used

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  • Multilayer-structure radar wave-absorbing cloth and preparation method thereof

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preparation example Construction

[0034]The preparation of the multi-layer structure radar absorbing cloth of the present invention mainly includes three steps: (1) preparation of magnetic metal alloy micropowder; (2) preparation of wave-absorbing coating; (3) coating of wave-absorbing material.

[0035] According to the prior art, there are mainly two problems to be solved: the preparation of the wave-absorbing coating and the setting of the coating process parameters of the wave-absorbing material.

[0036] The material and preparation method of the present invention require that the powder of the wave-absorbing material layer is a magnetic metal alloy powder, and the alloy powder is calculated by mass ratio, Fe: 85% to 95%, Cr: 0.5% to 5%, Si: 0.1% to 3% %, Al: 0.05% to 7%. The magnetic metal micropowder is a uniform flake, with a diameter of about 2-15 μm and a thickness of about 200 nm.

[0037] The material and preparation method of the present invention, in terms of structural design, according to the ...

example 1

[0042] Example 1: Preparation of multi-layer structure radar absorbing cloth

[0043] Prepare the magnetic metal alloy micropowder according to the proportion, the magnetic metal alloy micropowder of the absorbing material layer is calculated according to the mass percentage proportion, Fe is 85%, Cr is 5%, Si is 3%, and Al is 7%. The magnetic metal alloy powder is prepared by mechanical ball milling;

[0044] (1) First coat a layer of polyurethane adhesive on the surface of the canvas soaked in flame retardant, and dry and cure in an oven at 160 °C for 10 minutes;

[0045] (2) Select the magnetic metal alloy powder with a sheet diameter of 2 μm, dry the magnetic metal alloy powder at 50 °C for 6 hours, then divide it into polyurethane, and stir it evenly to make a wave-absorbing material absorbing coating;

[0046] (3) Step 4, making microwave-absorbing cloth: ①. Coat the surface of the canvas with a layer of polyurethane, the thickness of which is controlled between 10 μm, ...

example 2

[0047] Example 2: Preparation of multi-layer structure radar absorbing cloth

[0048] Prepare the magnetic metal alloy micropowder according to the proportion, the magnetic metal alloy micropowder of the absorbing material layer is calculated according to the mass percentage proportion, Fe is 90%, Cr is 4.5%, Si is 0.1%, and Al is 5.4%. The magnetic metal alloy powder is prepared by mechanical ball milling;

[0049] (1) First coat a layer of polyurethane adhesive on the surface of the canvas soaked in flame retardant, and dry and cure in an oven at 160 °C for 10 minutes;

[0050] (2) Select magnetic metal alloy powder with a sheet diameter of 7 μm, dry the magnetic metal alloy powder at 50 °C for 6 hours, then divide it into polyurethane, and stir it evenly to make a wave-absorbing coating;

[0051] (3) Making microwave-absorbing cloth: ①. Coat the surface of the canvas with a layer of polyurethane, the thickness of which is controlled between 30 μm, and dry and solidify in a...

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Abstract

The invention relates to multilayer-structure radar wave-absorbing cloth and a preparation method thereof. The multilayer-structure radar wave-absorbing cloth is mainly used for production of gun covers, tank outer covers, vehicle canvases, camping tents, camouflage nets and other military use fields, and includes a substrate canvas, wave-absorbing material layers and adhesion agent layers; the wave-absorbing material layers are respectively pasted on the substrate canvas through the adhesion agent layers in a superimposed mode, and the surface of the outermost layer of the wave-absorbing material layers is also provided with the adhesion agent layer. The wave-absorbing material layers are wave-absorbing coating layers, wherein a wave-absorbing coating is a polyurethane coating containing a magnetic metal alloy micropowder, and the magnetic metal alloy micropowder of the wave-absorbing material layers comprises the components by mass percentage: 85%-95% of Fe, 0.5%-5% of Cr, 0.1%-3% of Si, and 0.05%-7% of Al. The wave-absorbing cloth has the advantages of strong wave-absorbing ability, wide wave-absorbing frequency band, water proof, gas permeation, flame retardance.

Description

technical field [0001] The invention relates to a multi-layer structure radar wave-absorbing cloth and a preparation method thereof, which are mainly used in military fields such as making gun coats, tank covers, vehicle canvases, camping tents, and camouflage nets. Background technique [0002] With the rapid development of modern military technology, the defense systems of countries all over the world are more and more likely to be detected, tracked and attacked by the enemy. The survivability of military targets and the penetration capability of weapon systems are seriously threatened. Therefore, the stealth of weapons has been widely valued and developed rapidly, forming a specialized technology - stealth technology. As a high technology, it is called the latest three technological achievements in military science together with laser weapons and cruise missiles. Stealth technology refers to a comprehensive technology that reduces the detectable signal characteristics of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/04C09D175/04C09D5/32
Inventor 华明扬华伽杰黄毅萍张成权徐峰何程林段存业王宏谟贾近
Owner 江阴市诺科生物新材料科技有限公司
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