Camouflage net with adjustable wave absorption and transmission functions and preparation method of camouflage net

Abstract

The invention relates to a camouflage net with adjustable wave absorption and transmission functions and a preparation method thereof. The method comprises the following steps: preparing a camouflage coating by adopting a shape memory material; uniformly coating base cloth with the camouflage paint to obtain coated cloth; the coated cloth is subjected to pattern cutting and then bound with the gridding cloth, sewing and edge covering are conducted, and the camouflage net with the adjustable wave absorbing and transmitting functions is obtained. Wherein the camouflage paint comprises radar camouflage paint and coloring paint. According to the invention, the camouflage net is prepared from the shape memory material, so that the camouflage net is endowed with compatibility of wave absorbing and wave transmitting functions, and the shape change can be realized only through a heating mode in a scene in which wave absorbing and wave transmitting need to be converted, so that the function conversion of the camouflage net is realized; the traditional tedious steps of disassembling, assembling and replacing the camouflage net are omitted, and the time is greatly saved.

Description

Technical Field

[0001] The present invention belongs to the technical fields of materials technology and camouflage equipment technology, and particularly relates to a camouflage net with adjustable absorption and transmission wave functions and a preparation method thereof. Background Art

[0002] As a technology for countering modern reconnaissance and capture attacks, camouflage can effectively reduce the probability of a target being detected and recognized, and improve the battlefield survival ability of the target, which has attracted great attention from countries around the world. Among them, the camouflage net is one of the basic camouflage equipment and is a kind of stealth fabric used to cover fixed targets to achieve low detectability.

[0003] In recent years, with the development of detection technology and guidance technology, the camouflage net with a single working band can no longer meet the requirements of modern high-tech camouflage. The research on the camouflage net with multi-band and wide-spectrum compatible comprehensive performance has become a development trend. From the analysis of the existing camouflage net technology, most of them mainly focus on the research of multi-band and wide-spectrum compatible comprehensive performance, and can achieve multi-band compatible performance such as radar, infrared, and visible light. However, in the scenario where the absorption wave function and the transmission wave function need to be switched, no relevant compatibility technology research has been found.

[0004] From the analysis of the existing technology, the existing camouflage net technology mostly focuses on the research of multi-band and wide-spectrum performance. In terms of radar stealth, it has the disadvantage of relatively single function, generally only having an absorption wave function or only having a transmission wave function. When the equipment faces a specific use scenario, such as signal transmission or signal reception, if the absorption wave camouflage net is installed at the antenna window, it will interfere with or shield the signal; when camouflage stealth is required, if the transmission wave camouflage net is installed, the target will be easily detected and exposed. For the scenario where the absorption and transmission wave functions need to be switched, the existing technology often can only adopt the method of manual replacement to replace the absorption wave camouflage net and the transmission wave camouflage net. Obviously, it has the disadvantages of long time consumption, repeated replacement, and complex operation. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a camouflage net with adjustable absorption and transmission wave functions and a preparation method thereof. The camouflage net prepared by using this method not only has radar stealth performance, but also can be quickly switched into a transmission wave camouflage net by heating and deforming in the scenario where wave transmission is required, and has the performance of convertible adjustment of absorption and transmission wave functions.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A preparation method of a camouflage net with adjustable absorption and transmission wave functions includes the following steps:

[0008] Prepare a camouflage coating by using a shape memory material;

[0009] Apply the camouflage coating evenly on the base fabric respectively to obtain the coated fabric;

[0010] Cut the coated fabric into flowers, then tie it with the mesh fabric and sew the edges to obtain a camouflage net with adjustable wave absorption and penetration function.

[0011] Furthermore, the camouflage coating includes a radar stealth coating and a coloring coating.

[0012] Furthermore, the radar stealth coating includes a shape memory resin matrix, an absorber, a solvent, and a curing agent. Mix each component evenly by mechanical stirring to obtain the radar stealth coating.

[0013] Furthermore, the shape memory resin matrix is selected from one or more of epoxy resin, polyurethane resin, ethylene propylene diene monomer (EPDM) resin, polystyrene resin, and polynorbornene resin; the absorber is selected from one or more of carbon black, carbon nanotubes, graphene, and carbonyl iron powder; the solvent is selected from one or more of toluene, xylene, acetone, and cyclohexane; the curing agent is selected from one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine, polyetheramine, and m-xylenediamine; the weight ratio of each component is: resin matrix 20 - 50%; absorber 5 - 30%; solvent 20 - 50%; curing agent 0.2 - 0.5%; the mechanical stirring is carried out by a high-speed disperser at a rotation speed of 1000 - 2000 r / min for 30 - 60 min.

[0014] Furthermore, the coloring coating includes a shape memory resin matrix, a coloring pigment, a solvent, and a curing agent. Mix each component evenly by mechanical stirring and then grind to obtain the coloring coating.

[0015] Furthermore, the shape memory resin matrix is selected from one or more of epoxy resin, polyurethane resin, ethylene propylene diene monomer (EPDM) resin, polystyrene resin, and polynorbornene resin; the coloring pigment is selected from one or more of chromium green, cobalt green, titanium yellow, chromium yellow, titanium red, iron red, iron yellow, and iron black; the solvent is selected from one or more of toluene, xylene, acetone, and cyclohexane; the curing agent is selected from one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine, polyetheramine, and m-xylenediamine; the weight ratio of each component is: resin matrix 20 - 50%; coloring pigment 10 - 30%; solvent 20 - 50%; curing agent 0.2 - 0.4%; the mechanical stirring is carried out by a high-speed disperser at a rotation speed of 1000 - 2000 r / min for 30 - 60 min, and then ground by a grinder at a rotation speed of 2000 - 3000 r / min for 60 - 120 min until the fineness of the coating reaches below 20 μm.

[0016] Further, the step of uniformly applying the camouflage coatings on the base fabric respectively includes: first, loading the base fabric onto a coater, uniformly applying the radar stealth coating on the base fabric, drying and curing it to obtain a radar-coated fabric, and then uniformly applying the coloring coating on the radar-coated fabric, drying and curing it to obtain a coated fabric.

[0017] Further, the base fabric is selected from one of polyester Oxford cloth or nylon cloth; the temperature for drying and curing is 100 - 150 °C, and the speed of the coater is 10 - 30 m / min.

[0018] The present invention also provides a camouflage net with adjustable wave absorption and transmission functions prepared according to the above method.

[0019] Further, the adjustable wave absorption and transmission camouflage has radar wave absorption performance and can be quickly switched into a wave-transmitting camouflage net by heating and deforming, realizing the conversion between wave absorption and wave transmission functions.

[0020] By using shape memory materials to prepare the camouflage net, the present invention endows the camouflage net with the compatibility of wave absorption and wave transmission functions. In the scenario where wave absorption and wave transmission need to be switched, only by heating, the shape can be changed, thus realizing the function conversion of the camouflage net, eliminating the cumbersome steps of traditional disassembly and replacement of the camouflage net, and greatly saving time. Specifically, the above technical solutions of the present invention have the following advantages:

[0021] 1. This solution provided by the present invention uses shape memory resin as the coating matrix and then prepares the camouflage net, enabling the finished camouflage net to have a shape memory effect, thereby endowing it with the characteristic of convertible wave absorption performance and wave transmission performance.

[0022] 2. In the scenario where wave absorption and wave transmission functions need to be switched, the rapid conversion between wave absorption and wave transmission functions can be quickly achieved by local heating. Compared with the traditional method of replacing the camouflage net, a large amount of operation time is saved.

[0023] 3. The camouflage net provided by the present invention has a simple structure. One set of the net can achieve the functions of two sets of traditional wave-transmitting nets and wave-absorbing nets, significantly reducing the production cost.

[0024] 4. The preparation method of the camouflage net provided by the present invention is simple, feasible, with a mature and stable process, and can be mass-produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a physical diagram of the camouflage net prepared by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below through specific embodiments and drawings.

[0027] The present invention provides a camouflage net with adjustable radar wave absorption and transmission functions and a preparation method thereof. The camouflage net prepared by this method not only has radar wave absorption performance but also can be quickly switched into a wave-transmitting camouflage net by heating and deforming in scenarios where wave transmission is required, having the performance of convertible adjustment of wave absorption and wave transmission functions.

[0028] Specifically, the preparation method of the camouflage net provided by the present invention includes the following steps: The first step, which is also the most crucial step, is to prepare camouflage coatings using shape memory materials, including radar stealth coatings and coloring coatings; the second step is to evenly apply the coatings on the base fabric respectively to obtain coated fabrics; the third step is to cut the coated fabrics into patterns, then bind them with grid fabrics, and then sew and edge-wrap to obtain a camouflage net with adjustable radar wave absorption and transmission functions.

[0029] In the first step, the radar stealth coating is composed of a shape memory resin matrix, an absorber, a solvent, and a curing agent. The above components are mechanically stirred and mixed evenly to obtain the radar stealth coating.

[0030] The shape memory resin matrix is selected from one or more of epoxy resin, polyurethane resin, ethylene propylene diene monomer (EPDM) resin, polystyrene resin, and polynorbornene resin;

[0031] The absorber is selected from one or more of carbon black, carbon nanotubes, graphene, and carbonyl iron powder;

[0032] The solvent is selected from one or more of toluene, xylene, acetone, and cyclohexane;

[0033] The curing agent is selected from one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine, polyetheramine, and m-xylenediamine.

[0034] The weight ratios of the above components are as follows: resin matrix: 20 - 50%; absorber: 5 - 30%; solvent: 20 - 50%; curing agent: 0.2 - 0.5%.

[0035] Mechanical stirring is carried out using a high-speed disperser at a rotation speed of 1000 - 2000 r / min for 30 - 60 min.

[0036] The coloring coating is composed of a shape memory resin matrix, a coloring pigment, a solvent, and a curing agent. The above components are mechanically stirred and mixed evenly, and then ground to obtain the coloring coating.

[0037] The shape memory resin matrix is selected from one or more of epoxy resin, polyurethane resin, ethylene propylene diene monomer (EPDM) resin, polystyrene resin, and polynorbornene resin;

[0038] The coloring pigment is selected from one or more of chromium green, cobalt green, titanium yellow, chromium yellow, titanium red, iron red, iron yellow, and iron black.

[0039] The solvent is selected from one or more of toluene, xylene, acetone, and cyclohexane;

[0040] The curing agent is selected from one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine, polyetheramine, and m-xylenediamine.

[0041] The weight ratio of each of the above components is: resin matrix: 20 - 50%; coloring pigment: 10 - 30%; solvent: 20 - 50%; curing agent: 0.2 - 0.4%.

[0042] Mechanical stirring is carried out using a high-speed disperser and dispersed at a speed of 1000 - 2000 r / min for 30 - 60 min, and then ground by a grinder at a speed of 2000 - 3000 r / min for 60 - 120 min until the fineness of the coating reaches below 20 μm.

[0043] In the second step, first, the base fabric is loaded on a coater, and the radar stealth coating is evenly coated on the base fabric and dried and cured to obtain a radar-coated fabric. Then, the coloring coating is evenly coated on the radar-coated fabric and dried and cured to obtain a coated fabric.

[0044] The base fabric is selected from one of polyester oxford cloth or nylon fabric;

[0045] The drying and curing temperature is 100 - 150 °C, and the coater vehicle speed is 10 - 30 m / min.

[0046] In the third step, the prepared coated fabric is cut into patterns, then tied to the bottom grid fabric, and then stitched and edged to prepare a camouflage net with adjustable radar wave absorption and penetration functions.

[0047] Among them, cutting the patterns means cutting the coated fabric according to the designed pattern, aiming to simulate the external shape structure characteristics of the background. At the same time, cutting the patterns also has a certain impact on the radar wave absorption performance. The shape of the cut patterns is not fixed and can be selected according to requirements. For example, it is generally Figure 1 in the shape of a U, and the opening size and angle of the cut patterns are adjustable. Tying the grid fabric is to fix the coated fabric. When tying, a certain tension needs to be applied in the stretching direction of the coated fabric to keep the cut patterns standing, forming a three-dimensional effect, which is beneficial to the adjustment of the wave absorption performance. Edging is also to fix the coated fabric and prevent it from being hooked at the edges.

[0048] The camouflage net prepared by this method has radar wave absorption performance. When the wave transmission function is needed, tools such as a hot air gun are used to locally heat the camouflage net. The shape memory material in the camouflage net coating has a shape memory effect and rapidly deforms when heated, the cut flower openings become larger, and the camouflage net is converted into a wave transmission function.

[0049] The key points of the present invention are:

[0050] 1. In the present invention, a shape memory resin is used as the resin matrix of the coating to prepare the camouflage net, so that the finished camouflage net has a shape memory effect.

[0051] 2. The camouflage net in the present invention has the characteristic that the wave absorption performance and the wave transmission performance can be converted.

[0052] 3. When needed, the camouflage net in the present invention can quickly realize the conversion from the wave absorption function to the wave transmission function, saving time.

[0053] 4. The camouflage net in the present invention not only has the characteristic of visible light camouflage, but also has the characteristic of radar stealth.

[0054] 5. The preparation method of the camouflage net in the present invention is simple, combining the traditional wave transmission camouflage net and the wave absorption camouflage net into one, reducing the production cost.

[0055] Example:

[0056] (1) Weigh 50 kg of epoxy resin, add 40 kg of xylene, stir to completely dissolve the resin, then add 8 kg of carbon black powder and 0.75 kg of m-xylenediamine. Use a high-speed disperser to stir at a speed of 1000 r / min for 30 minutes to make the components evenly mixed, and prepare a radar stealth coating. Then weigh 40 kg of epoxy resin, add 32 kg of xylene, stir to completely dissolve the resin, and then add 17 kg of chromium green, 7 kg of titanium yellow, 3 kg of titanium red, 1 kg of iron black pigment, and 0.6 kg of m-xylenediamine respectively. Use a high-speed disperser to stir at a speed of 1000 r / min for 30 minutes to make the components evenly mixed. Add the mixed coating to a high-speed grinding machine and grind at a speed of 2500 r / min for 60 minutes until the fineness reaches 15 μm to prepare a colored coating.

[0057] (2) Load 200D polyester cloth into a coater, and then evenly coat the radar coating prepared in step (1) on the polyester cloth, with one layer coated on each of the front and back sides. Set the speed of the coater to 20 m / min and the drying temperature to 130 °C to prepare a radar-coated cloth. Then load the radar-coated cloth on the coater, and evenly coat the colored coating prepared in step (1) on it, with one layer coated on each of the front and back sides. Set the speed of the coater to 20 m / min and the drying temperature to 130 °C to prepare a colored-coated cloth.

[0058] (3) Cut the coated fabric prepared in step (2) into flowers according to the designed pattern, then lay it on the grid fabric, tie the two layers of fabric, and then perform stitching and edge wrapping treatment to prepare a camouflage net with adjustable wave absorption and penetration functions.

[0059] The specific embodiments of the present invention disclosed above are intended to help understand the content of the present invention and implement it accordingly. Those of ordinary skill in the art can understand that various substitutions, changes, and modifications are possible without departing from the spirit and scope of the present invention. The present invention should not be limited to the content disclosed in the embodiments of this specification, and the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. Preparation method of a camouflage net with adjustable wave absorption and penetration function, characterized in that, it includes the following steps: Prepare a camouflage coating using a shape memory material; Apply the camouflage coating evenly on the base cloth respectively to obtain a coated cloth; Cut the coated cloth into patterns, then tie it with a mesh cloth, and sew the edges to obtain a camouflage net with adjustable wave absorption and penetration function.

2. The method according to claim 1, characterized in that, the camouflage coating includes a radar stealth coating and a coloring coating.

3. The method according to claim 2, characterized in that, the radar stealth coating includes a shape memory resin matrix, an absorber, a solvent, and a curing agent. Mix each component evenly by mechanical stirring to obtain a radar stealth coating.

4. The method according to claim 3, characterized in that, the shape memory resin matrix is selected from one or more of epoxy resin, polyurethane resin, ethylene propylene diene monomer (EPDM) resin, polystyrene resin, and polynorbornene resin; the absorber is selected from one or more of carbon black, carbon nanotubes, graphene, and carbonyl iron powder; the solvent is selected from one or more of toluene, xylene, acetone, and cyclohexane; the curing agent is selected from one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine, polyetheramine, and m-xylenediamine; the weight ratio of each component is: resin matrix 20 - 50%; absorber 5 - 30%; solvent 20 - 50%; curing agent 0.2 - 0.5%; the mechanical stirring is carried out using a high-speed disperser at a rotation speed of 1000 - 2000 r / min for 30 - 60 min.

5. The method according to claim 1, characterized in that, the coloring coating includes a shape memory resin matrix, a coloring pigment, a solvent, and a curing agent. Mix each component evenly by mechanical stirring and then grind to obtain a coloring coating.

6. The method according to claim 5, characterized in that, the shape memory resin matrix is selected from one or more of epoxy resin, polyurethane resin, ethylene propylene diene monomer (EPDM) resin, polystyrene resin, and polynorbornene resin; the coloring pigment is selected from one or more of chromium green, cobalt green, titanium yellow, chromium yellow, titanium red, iron red, iron yellow, and iron black; the solvent is selected from one or more of toluene, xylene, acetone, and cyclohexane; the curing agent is selected from one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine, polyetheramine, and m-xylenediamine; the weight ratio of each component is: resin matrix 20 - 50%; coloring pigment 10 - 30%; solvent 20 - 50%; curing agent 0.2 - 0.4%; the mechanical stirring is carried out using a high-speed disperser at a rotation speed of 1000 - 2000 r / min for 30 - 60 min, and then ground by a grinder at a rotation speed of 2000 - 3000 r / min for 60 - 120 min until the fineness of the coating reaches below 20 μm.

7. The method according to claim 1, characterized in that, the step of applying the camouflage coating evenly on the base cloth respectively includes: First, mount the base fabric on a coating machine, evenly coat the radar stealth coating on the base fabric, and then dry and cure it to obtain a radar-coated fabric. Then, evenly apply the coloring coating on the radar-coated fabric and dry and cure it to obtain the coated fabric.

8. According to the method described in claim 1, wherein, the base fabric is selected from one of polyester Oxford cloth or nylon fabric; the temperature for drying and curing is 100 - 150 °C, and the speed of the coating machine is 10 - 30 m / min.

9. A camouflage net with adjustable wave absorption and transmission functions prepared by the method according to any one of claims 1 to 8.

10. The camouflage net with adjustable wave absorption and transmission functions according to claim 9, wherein, the camouflage net has radar wave absorption performance and can be quickly switched into a wave-transmitting camouflage net by heating and deforming, realizing the conversion between the wave absorption function and the wave transmission function.

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