阅读说明：本技术 一种夹层结构伪装网及其制备方法 (Sandwich structure camouflage net and preparation method thereof ) 是由 张曦月 王娜 张金祥 李自强 黄忠明 于 2021-10-12 设计创作，主要内容包括：本发明涉及一种夹层结构伪装网及其制备方法,所述夹层结构伪装网由面层、夹层和底层经包边和绗缝制成,所述面层是将基布两面涂覆阻燃涂料,烘干后,一面涂覆吸波涂料并烘干,再两面涂覆迷彩涂料,烘干后制成迷彩单色布,迷彩单色布经拼图和切花工艺制成面层；所述夹层是将网孔布浸渍吸波涂料,经烘干后制成；所述底层是将基布两面涂覆阻燃涂料,烘干后,一面涂覆吸波涂料并烘干,再两面涂覆红外涂料,经切孔制成。本发明的夹层结构伪装网为具备优异低频雷达伪装隐身性能的多频谱伪装网,且兼具防钩挂和阻燃性能。(The invention relates to a sandwich structure camouflage net and a preparation method thereof, wherein the sandwich structure camouflage net is made by a surface layer, an interlayer and a bottom layer through edge covering and quilting, the surface layer is formed by coating flame retardant coating on two surfaces of a base cloth, drying, coating wave-absorbing coating on one surface, drying, coating camouflage coating on two surfaces, drying to prepare camouflage monochromatic cloth, and preparing the camouflage monochromatic cloth into the surface layer through jigsaw puzzle and pattern cutting processes; the interlayer is prepared by soaking the mesh cloth in the wave-absorbing coating and drying; the bottom layer is prepared by coating flame-retardant coating on two sides of base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the other two sides, and cutting holes. The sandwich structure camouflage net is a multi-spectrum camouflage net with excellent low-frequency radar camouflage stealth performance, and has the anti-hooking and flame-retardant performances.)

1. The utility model provides a sandwich structure camouflage net, is by surface course, intermediate layer and bottom through borduring and quilting make, its characterized in that: the surface layer is prepared by coating flame-retardant coating on two surfaces of a base cloth, drying, coating wave-absorbing coating on one surface, drying, coating camouflage coating on the two surfaces, drying to prepare camouflage monochromatic cloth, and preparing the camouflage monochromatic cloth into the surface layer through a jigsaw and cut-flower process; the interlayer is prepared by soaking the mesh cloth in the wave-absorbing coating and drying; the bottom layer is prepared by coating flame-retardant coating on two sides of base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the other two sides, and cutting holes.

2. A method of making a sandwich camouflage net according to claim 1, wherein the method comprises the steps of: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating camouflage coating on the two sides, drying to obtain camouflage monochromatic cloth, and making surface layer by jigsaw puzzle and pattern cutting process; soaking the mesh cloth in the wave-absorbing coating, and drying to prepare an interlayer; coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the two sides, and cutting holes to obtain a bottom layer; the camouflage net is made of a surface layer, an interlayer and a bottom layer through edge covering and quilting.

3. The method of claim 2, wherein the mesh diameter of the mesh cloth is 0.4mm to 1 mm.

4. The preparation method according to claim 2, wherein the dosage of the mesh cloth impregnated wave-absorbing coating is 10-50 g/m²The viscosity of the wave-absorbing coating for the interlayer is 10 s-30 s.

5. The preparation method of claim 4, wherein the wave-absorbing coating for the interlayer comprises the following components in percentage by mass: 15-25% of distilled water, 65-75% of adhesive, 8-12% of absorbent, 2.8-4% of dispersant, 0.1-0.3% of defoaming agent, 0.2-2% of thickening agent and 1.5% of cross-linking agent.

6. The preparation method according to claim 4, wherein the adhesive is one or more of an aqueous polyurethane adhesive, an aqueous acrylate adhesive, an aqueous epoxy resin adhesive or an aqueous organic silicon acrylate adhesive.

The method of claim 4, wherein the absorbent is one or more of pelletized carbon black, graphite, and carbon nanotubes.

Technical Field

The invention belongs to the technical field of camouflage stealth, and particularly relates to a preparation method of an interlayer material for a sandwich structure camouflage net and a preparation method of a camouflage net structure.

Background

The camouflage stealth is an important component of the battle security and is an effective means for resisting military reconnaissance and attack. Under the condition of high-tech warfare, the role and the status of camouflage are more prominent. The camouflage net is one of the most basic, effective and cost-effective camouflage equipment. The camouflage stealth equipment can reduce and eliminate various exposed characteristics of the target, conceal the existence of the target and has the best camouflage effect.

The radar wave stealth mechanism of the camouflage net can be described as follows: the electromagnetic wave transmitted by the radar antenna is partially scattered to the periphery by the outer layer structure of the camouflage net, and partially enters the camouflage net structure, and is scattered and absorbed for many times through the interlayer space, so that the electromagnetic energy is attenuated to the maximum extent, a broadband absorption effect is obtained, and the radar target characteristic of vehicle equipment, namely RCS signals, is weakened to the minimum degree. The existing multi-spectrum camouflage net is usually in a structural form of a single-layer net (combination of surface net decorative cloth and a skeleton net) or a double-layer net (combination of surface net decorative cloth and bottom net perforated cloth), can realize camouflage of equipment in multiple bands such as optics, infrared, radar, hyperspectral and the like, but has poor low-frequency wave absorption performance of radar bands, the reflectivity of an L-band radar is higher than-8 dB, and the requirement of national military standard first-level radar indexes is difficult to meet. The sandwich-structure camouflage net provided by the invention is based on the existing double-layer structure camouflage net, the sandwich layer is used as a low-frequency strong absorption layer, the camouflage performance of the radar low-frequency band of the camouflage net can be effectively solved by regulating and controlling the mesh diameter of the mesh cloth and the immersion gram weight of the wave-absorbing coating, the radar reflectivity of the L band can reach-18 dB, and is far better than the requirement of-8 dB in the index requirement of a first-level radar.

Disclosure of Invention

The invention provides a sandwich-structure camouflage net and a preparation method thereof, and the preparation method can effectively improve the camouflage stealth performance of the multi-spectrum camouflage net in the low-frequency band of a radar.

The technical scheme adopted by the invention for solving the technical problem is as follows:

the utility model provides a sandwich structure camouflage net, is by surface course, intermediate layer and bottom through borduring and quilting make, its characterized in that: the surface layer is prepared by coating flame-retardant coating on two surfaces of a base cloth, drying, coating wave-absorbing coating on one surface, drying, coating camouflage coating on the two surfaces, drying to prepare camouflage monochromatic cloth, and preparing the camouflage monochromatic cloth into the surface layer through a jigsaw and cut-flower process; the interlayer is prepared by soaking the mesh cloth in the wave-absorbing coating and drying; the bottom layer is prepared by coating flame-retardant coating on two sides of base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the other two sides, and cutting holes.

The invention also provides a preparation method of the sandwich structure camouflage net, which comprises the steps of coating flame retardant coating on two sides of base cloth, drying, coating wave-absorbing coating on one side, drying, coating camouflage coating on the two sides, drying to prepare camouflage monochromatic cloth, and preparing a surface layer by jigsaw puzzle and cut flower processes; soaking the mesh cloth in the wave-absorbing coating, and drying to prepare an interlayer; coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the two sides, and cutting holes to obtain a bottom layer; the camouflage net is made of a surface layer, an interlayer and a bottom layer through edge covering and quilting.

Specifically, the method comprises the following steps:

1) preparing the wave-absorbing coating for the interlayer:

the wave-absorbing coating comprises the following components in percentage by mass: 15-25% of distilled water, 65-75% of adhesive, 8-12% of absorbent, 2.8-4% of dispersant, 0.1-0.3% of defoaming agent, 0.2-2% of thickener and 1.5% of cross-linking agent, wherein the distilled water, the adhesive, the absorbent, the dispersant and the defoaming agent are weighed and dispersed for 20-50 min at the rotating speed of 600-1000 r/min; then adding the thickening agent and the cross-linking agent, rotating at the speed of 500 r/min-900 r/min, and dispersing for 15 min-40 min. Preparing the wave-absorbing coating for the interlayer;

2) preparing a surface layer, an interlayer and a bottom layer cloth: coating flame-retardant coating (conventional) on two surfaces of the base cloth, drying, coating wave-absorbing coating (conventional) on one surface, drying, coating camouflage coating (conventional) on the two surfaces, drying to prepare camouflage single-color cloth, and preparing a surface layer by jigsaw puzzle and cut flower processes; soaking the mesh cloth in a wave-absorbing coating for the interlayer, and drying to prepare the interlayer; coating flame-retardant coating on two sides of the base cloth (conventional), drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the other side (conventional), and cutting to obtain the bottom layer.

3) Preparing a camouflage net: the surface layer, the interlayer and the bottom layer are manufactured by edge covering and quilting.

Furthermore, the diameter of the meshes of the mesh cloth is 0.4 mm-1 mm.

Further, the adhesive is one or more of an aqueous polyurethane adhesive, an aqueous acrylate adhesive, an aqueous epoxy resin adhesive or an aqueous organic silicon acrylate adhesive.

Further, the absorbent is one or more of granulated carbon black, graphite and carbon nanotubes.

Compared with the prior art, the invention has the following advantages:

1) the sandwich structure camouflage net provided by the invention optimizes and improves the camouflage stealth performance of the sandwich structure camouflage net in the low-frequency band of a radar on the basis of realizing multi-spectrum camouflage.

2) The preparation process of the sandwich structure camouflage net provided by the invention is simple and feasible.

Description of the drawings:

figure 1 is a plot of (1-2GHz) radar reflectance (sample size 500mm) for two camouflage nets of example 1.

Figure 2 is a plot of (2-18GHz) radar reflectivity (sample size 300mm) for two camouflage nets of example 1.

Figure 3 is a plot of (1-2GHz) radar reflectance (sample size 500mm) for two camouflage nets from example 2.

Figure 4 is a plot of (2-18GHz) radar reflectance (sample size 300mm) for two camouflage nets of example 2.

Figure 5 is a plot of (1-2GHz) radar reflectance (sample size 500mm) for two camouflage nets from example 3.

Figure 6 is a plot of (2-18GHz) radar reflectance (sample size 300mm) for two camouflage nets of example 3.

Figure 7 is a plot of (1-2GHz) radar reflectance (sample size 500mm) for two camouflage nets of example 4.

Figure 8 is a plot of (2-18GHz) radar reflectance (sample size 300mm by 300mm) for two camouflage nets from example 4.

Detailed Description

The following are specific embodiments of the present invention, and it should be noted that these embodiments are only used for illustrating the present invention and are not used to limit the scope of the present invention.

The flame-retardant coating, the camouflage coating and the infrared coating are conventional commercial coatings.

In order to highlight the advantages of the invention, the two-layer structure camouflage net in the examples 1, 2 and 3 is selected, and the raw material composition, the coating formula and the preparation process are completely the same.

Example 4 is used to provide a screening comparison of mesh diameter and grammage of the impregnation of the wave-absorbing coating.

Example 1:

the wave-absorbing coating comprises the following components in parts by weight: 20% of distilled water, 65% of adhesive, 8.7% of absorbent, 3.2% of dispersant, 0.1% of defoaming agent, 1.5% of thickening agent and 1.5% of cross-linking agent.

The preparation process of the wave-absorbing coating comprises the following steps: weighing distilled water, an adhesive, an absorbent, a dispersant and a defoamer, and dispersing for 30min at the rotation speed of 900 r/min; then adding the thickening agent and the cross-linking agent, rotating at the speed of 700r/min, and dispersing for 20 min.

Preparing a surface layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating camouflage coating on the two sides, drying to obtain camouflage monochromatic cloth, and making surface layer by jigsaw puzzle and pattern cutting process;

preparing an interlayer: soaking the wave-absorbing coating for the interlayer by using mesh cloth with the mesh diameter of 0.4mm, and drying to obtain the mesh cloth with the soaking amount of 20g/m per unit area²；

Preparing a bottom layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the two sides, and cutting holes to obtain the bottom layer.

The surface layer, the interlayer and the bottom layer are manufactured into the camouflage net with the interlayer structure through edge covering and quilting processes.

The surface layer and the bottom layer are made into a double-layer structure camouflage net through edge covering and quilting processes.

The radar reflectivity of the camouflage net prepared under the condition is tested, and is shown in figures 1 and 2.

Under the conditions, the mean value of the reflectivity of the radar of 1-2GHz of the prepared sandwich structure camouflage net is-15.72 GHz; under the same condition, the mean value of the reflectivity of the double-layer structured camouflage net radar is-3.26 GHz. Therefore, the sandwich structure can remarkably improve the L-band camouflage performance (shown in figure 1) of the camouflage net while ensuring the full-band camouflage stealth performance (shown in figure 2) of the radar.

Example 2:

the wave-absorbing coating comprises the following components in parts by weight: 18% of distilled water, 66% of adhesive, 10% of absorbent, 3.5% of dispersant, 0.2% of defoaming agent, 0.8% of thickening agent and 1.5% of cross-linking agent.

The preparation process of the wave-absorbing coating comprises the following steps: weighing distilled water, an adhesive, an absorbent, a dispersant and a defoamer, and dispersing at a rotation speed of 800r/min for 25 min; then adding the thickening agent and the cross-linking agent, rotating at 600r/min, and dispersing for 20min

Preparing a surface layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating camouflage coating on the two sides, drying to obtain camouflage monochromatic cloth, and making surface layer by jigsaw puzzle and pattern cutting process;

preparing an interlayer: the wave-absorbing coating is soaked in mesh cloth with the diameter of 0.6mm, and after drying, the unit area soaking amount of the mesh cloth is 30g/m²；

Preparing a bottom layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the two sides, and cutting holes to obtain the bottom layer.

The surface layer, the interlayer and the bottom layer are manufactured into the camouflage net with the interlayer structure through edge covering and quilting processes.

The surface layer and the bottom layer are made into a double-layer structure camouflage net through edge covering and quilting processes.

The radar reflectivity of the camouflage net prepared under the condition is tested, and is shown in figures 3 and 4.

Under the conditions, the mean value of the reflectivity of the radar of 1-2GHz of the prepared sandwich structure camouflage net is-18.54 GHz; under the same condition, the mean value of the reflectivity of the double-layer structured camouflage net radar is-6.17 GHz. Therefore, the sandwich structure can remarkably improve the L-band camouflage performance of the radar of the camouflage net (shown in figure 3) while ensuring the full-band camouflage stealth performance of the radar (shown in figure 4).

Example 3:

the wave-absorbing coating comprises the following components in parts by weight: 20% of distilled water, 65% of adhesive, 10.1% of absorbent, 3.0% of dispersant, 0.1% of defoaming agent, 0.3% of thickening agent and 1.5% of cross-linking agent.

The preparation process of the wave-absorbing coating comprises the following steps: weighing distilled water, an adhesive, an absorbent, a dispersant and a defoamer, and dispersing for 30min at a rotation speed of 700 r/min; then adding the thickening agent and the cross-linking agent, rotating at 600r/min, and dispersing for 15 min.

Preparing a surface layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating camouflage coating on the two sides, drying to obtain camouflage monochromatic cloth, and making surface layer by jigsaw puzzle and pattern cutting process;

preparing an interlayer: the wave-absorbing coating is impregnated by mesh cloth with the diameter of 1mm, and after drying, the unit area impregnation amount of the mesh cloth is 45g/m²；

Preparing a bottom layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the two sides, and cutting holes to obtain the bottom layer.

The surface layer, the interlayer and the bottom layer are manufactured into the camouflage net with the interlayer structure through edge covering and quilting processes.

The surface layer and the bottom layer are made into a double-layer structure camouflage net through edge covering and quilting processes.

The radar reflectivity of the camouflage net prepared under the condition is tested, and is shown in fig. 5 and 6.

Under the conditions, the mean value of the reflectivity of the radar of 1-2GHz of the prepared sandwich structure camouflage net is-18.54 GHz; under the same condition, the mean value of the reflectivity of the double-layer structured camouflage net radar is-6.17 GHz. Therefore, the sandwich structure can remarkably improve the L-band camouflage performance (shown in figure 5) of the camouflage net while ensuring the full-band camouflage stealth performance (shown in figure 6) of the radar.

Example 4:

the wave-absorbing coating comprises the following components in parts by weight: 20% of distilled water, 65% of adhesive, 10% of absorbent, 2.9% of dispersant, 0.2% of defoaming agent, 0.4% of thickening agent and 1.5% of cross-linking agent.

The preparation process of the wave-absorbing coating comprises the following steps: weighing distilled water, an adhesive, an absorbent, a dispersant and a defoamer, and dispersing for 30min at a rotation speed of 800 r/min; then adding the thickening agent and the cross-linking agent, rotating at the speed of 500r/min, and dispersing for 15 min.

Preparing a surface layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating camouflage coating on the two sides, drying to obtain camouflage monochromatic cloth, and making surface layer by jigsaw puzzle and pattern cutting process;

preparing an interlayer: the wave-absorbing coating is impregnated in mesh cloth with the diameter of 1mm, and after drying, the impregnation amount of the mesh cloth per unit area is 12g/m²；

Interlayer preparation: the wave-absorbing coating is soaked in mesh cloth with the diameter of 0.4mm, and after drying, the unit area soaking amount of the mesh cloth is 25g/m²；

Preparing a bottom layer: coating flame-retardant coating on two sides of the base cloth, drying, coating wave-absorbing coating on one side, drying, coating infrared coating on the two sides, and cutting holes to obtain the bottom layer.

The surface layer, the interlayer and the bottom layer are manufactured into the sandwich structure I camouflage net through edge covering and quilting processes.

The surface layer, the interlayer and the bottom layer are manufactured into the interlayer structure II camouflage net through edge covering and quilting processes.

The radar reflectivity of the camouflage net prepared under the condition is tested, and is shown in fig. 7 and 8.

Under the above conditions, the preparation is carried outThe obtained sandwich structure I and sandwich structure II can meet the requirements of radar full-waveband camouflage stealth performance (as shown in figure 8). The mean values of the reflectivities of the radar in the 1-2GHz wave bands are-14.60 GHz and-22.83 GHz respectively, and the requirements of first-level radar indexes in the national military standard are met (as shown in figure 7). The diameter (0.4mm) of the mesh of the sandwich structure II is smaller than that (1mm) of the mesh of the sandwich structure I, and the dipping amount (25 g/m) of the wave-absorbing coating of the sandwich structure II²) The dipping amount of the wave-absorbing coating is higher than that of the sandwich structure (12 g/m)²) The surface resistance of the sandwich structure II is lower than that of the sandwich structure I, so that the performance of the sandwich structure II camouflage net in a radar L wave band is superior to that of the sandwich structure I camouflage net.