阅读说明：本技术 一种楔形雷达织物吸波结构及其制备方法 (Wedge-shaped radar fabric wave-absorbing structure and preparation method thereof ) 是由 何�雄 顾兆栴 孙惠敏 何欣怡 于 2021-01-18 设计创作，主要内容包括：本发明涉及吸波技术领域,提供了一种楔形雷达织物吸波结构,其特征在于,包括从上到下依次设置的迷彩吸波单元和反射单元,所述迷彩吸波单元一体热压为楔形结构。还提供了一种楔形雷达织物吸波结构的制备方法。本发明生产的楔形雷达织物吸波结构,具有更好的抗撕裂、耐环境的优良性能；产品更轻质,具有更好的使用体验；本发明提供的楔形雷达织物吸波结构的制备方法,可以较简易的制备楔形雷达织物吸波结构,易于大规模批量生产；且用料节省,成本更低。(The invention relates to the technical field of wave absorption, and provides a wedge-shaped radar fabric wave absorption structure which is characterized by comprising a camouflage wave absorption unit and a reflection unit which are sequentially arranged from top to bottom, wherein the camouflage wave absorption unit is integrally hot-pressed into a wedge-shaped structure. Also provides a preparation method of the wave-absorbing structure of the wedge-shaped radar fabric. The wedge-shaped radar fabric wave-absorbing structure produced by the invention has better tear resistance and environment resistance; the product is lighter and has better use experience; the preparation method of the wedge-shaped radar fabric wave-absorbing structure can be used for preparing the wedge-shaped radar fabric wave-absorbing structure relatively simply and is easy for large-scale batch production; and the material is saved, and the cost is lower.)

1. The wedge-shaped radar fabric wave-absorbing structure is characterized by comprising a camouflage wave-absorbing unit and a reflection unit which are sequentially arranged from top to bottom, wherein the camouflage wave-absorbing unit is integrally hot-pressed into a wedge-shaped structure.

2. The wedge-shaped radar fabric wave-absorbing structure of claim 1, wherein the camouflage wave-absorbing unit comprises a camouflage coating, a first wave-absorbing coating and a fabric layer which are arranged from top to bottom in sequence.

3. The wedge-shaped radar fabric wave absorbing structure as claimed in claim 2, wherein the camouflage coating is 0.01-0.02 mm thick.

4. The wedge-shaped radar fabric wave-absorbing structure as recited in claim 2, wherein a second wave-absorbing coating is further disposed between the camouflage coating and the first wave-absorbing coating.

5. The wedge-shaped radar fabric wave-absorbing structure as claimed in claim 2, wherein the first wave-absorbing coating and the second wave-absorbing coating are both 0.10-0.15 mm thick.

6. The wedge-shaped radar fabric wave-absorbing structure of claim 1, wherein the reflection unit comprises a metal coating layer and a fabric layer which are arranged in sequence from top to bottom.

7. The wedge-shaped radar fabric wave-absorbing structure of claim 6, wherein the metal coating is an aluminum coating.

8. A method for preparing a wedge-shaped radar fabric wave-absorbing structure according to any one of claims 1 to 7, characterized by comprising the following steps:

s1: preparing a camouflage wave absorbing unit;

s2: the prepared camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure to form a camouflage wave absorbing structural unit;

s3: and (3) carrying out hot-press molding on the camouflage wave-absorbing structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

9. The method for preparing the wave-absorbing structure of the wedge-shaped radar fabric according to claim 8, wherein the specific method for preparing the camouflage wave-absorbing element in the step S1 is as follows: printing a first wave-absorbing coating on the fabric layer to form a wave-absorbing fabric; and then, printing a camouflage coating on the wave-absorbing fabric to form a camouflage wave-absorbing unit.

10. The method for preparing the wave-absorbing structure of the wedge-shaped radar fabric according to claim 9, wherein a second wave-absorbing coating is printed before the camouflage coating is printed on the wave-absorbing fabric.

Technical Field

The invention relates to the technical field of wave absorption, in particular to a wedge-shaped radar fabric wave absorption structure and a preparation method thereof.

Background

In the development of the modern electronic information technology, the problems of electromagnetic pollution, electromagnetic interference, disclosure and the like caused by electromagnetic wave radiation are paid attention to, and particularly in the aspect of military clothing, the shielding and absorption of electromagnetic waves become an important consideration factor for material selection. The wave absorbing mechanism of the radar fabric wave absorbing structure is as follows: electromagnetic waves entering the fabric structure from the wave-transmitting surface layer are scattered and absorbed for multiple times through the wave-absorbing structure, electromagnetic energy is attenuated to the maximum extent, and therefore a broadband absorption effect is obtained.

The existing radar wave absorbing structure is mainly divided into a three-dimensional structure and a plane structure, wherein the three-dimensional structure is subjected to infrared and radar multi-spectrum camouflage in a three-dimensional cut flower structure or an externally-hung cloth strip mode and the like; the design is modeled on leaves, a cut flower camouflage net is added outside the basic clothes, and the existing radar wave-absorbing structure with a three-dimensional structure has good radar wave-absorbing effect, but has heavy weight and poor anti-hooking performance; the wave absorbing performance of the planar structure is poor, and the radar reflectivity is below-0.6 dB at 8-18 GHz; the radar reflectivity is below-2.0 dB at 12-18 GHz.

Chinese patent with application number CN2020109120288 discloses a radar fabric wave-absorbing structure, which comprises a camouflage color unit, a wave-absorbing structure unit and a reflection unit from top to bottom in sequence; the camouflage unit is a camouflage coating printed on the fabric, the wave-absorbing structure unit is a cross-shaped star structure cut after a first wave-absorbing coating is printed on the fabric, and the reflecting unit is a metal coating printed on the fabric; also discloses a preparation method of the wave-absorbing structure; the radar fabric wave-absorbing structure has the advantages of infrared camouflage, radar wave-absorbing bearing, tear resistance, excellent environment resistance and the like. However, the preparation process is complex, large-scale batch production is not easy to realize, the material consumption is more, the cost is higher, and the product quality is heavier.

Disclosure of Invention

The first purpose of the invention is to provide a wedge-shaped radar fabric wave-absorbing structure which has better excellent performances of tear resistance and environment resistance; the product is lighter and has better use experience.

The second purpose of the invention is to provide a preparation method of the wedge-shaped radar fabric wave-absorbing structure, which can be used for preparing the wedge-shaped radar fabric wave-absorbing structure relatively simply and is easy for large-scale batch production; and the material is saved, and the cost is lower.

The embodiment of the invention is realized by the following technical scheme:

a wedge radar fabric wave-absorbing structure comprises a camouflage wave-absorbing unit and a reflection unit which are sequentially arranged from top to bottom, wherein the camouflage wave-absorbing unit is integrally hot-pressed into a wedge structure.

Furthermore, the camouflage wave absorbing unit comprises a camouflage coating, a first wave absorbing coating and a fabric layer which are sequentially arranged from top to bottom.

The camouflage wave absorbing unit is provided with a first wave absorbing coating, and the main components of the first wave absorbing coating are dielectric absorbing materials such as carbon black; the camouflage wave absorbing unit is integrally hot-pressed into a wedge-shaped structure, the first wave absorbing coating is matched with the wedge-shaped structure to reflect and absorb electromagnetic waves for multiple times, and the energy of the electromagnetic waves can be effectively dissipated, so that the wave absorbing effect is achieved.

Further, the thickness of the camouflage coating is 0.01-0.02 mm.

Further, a second wave-absorbing coating is arranged between the camouflage coating and the first wave-absorbing coating.

Furthermore, the thicknesses of the first wave-absorbing coating and the second wave-absorbing coating are both 0.10-0.15 mm.

The thickness of the first wave absorbing coating and the second wave absorbing coating is set to be 0.10-0.15 mm, the broadband wave absorbing effect of 8-18 GH wave bands can be achieved, and the wave absorbing effect is good.

According to the method, a first wave-absorbing coating and a second wave-absorbing coating are printed between a camouflage coating and a fabric layer, and the first wave-absorbing coating and the second wave-absorbing coating are subjected to electromagnetic wave matching design; specifically, different resistances formed by the first wave-absorbing coating and the second wave-absorbing coating have different absorption effects on electromagnetic waves, the invention mainly aims at the matching design of the thicknesses and the resistance values of the first wave-absorbing coating and the second wave-absorbing coating and the electromagnetic waves, and the resistance is set to be 200-500 ohms; therefore, the mechanical property of the radar fabric wave-absorbing structure is improved, the wave-absorbing frequency band of the radar fabric wave-absorbing structure is further widened, and the wave-absorbing property is greatly improved.

The structure without the first wave-absorbing coating and the second wave-absorbing coating has the radar reflectivity of 0 basically and no wave-absorbing effect.

Further, the reflection unit comprises a metal coating and a fabric layer which are arranged from top to bottom in sequence.

Further, the metal coating is an aluminum coating. Other metal coatings are also possible, such as: copper, silver, etc.

A preparation method of a wedge-shaped radar fabric wave-absorbing structure comprises the following steps:

s1: preparing a camouflage wave absorbing unit;

s2: the prepared camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure to form a camouflage wave absorbing structural unit;

s3: and (3) carrying out hot-press molding on the camouflage wave-absorbing structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

Further, the specific method for preparing the camouflage wave absorbing unit in S1 includes: printing a first wave-absorbing coating on the fabric layer to form a wave-absorbing fabric; and then, printing a camouflage coating on the wave-absorbing fabric to form a camouflage wave-absorbing unit.

The camouflage wave absorbing structural unit is prepared by directly integrating the camouflage wave absorbing unit into a wedge-shaped structure through hot pressing, the preparation process is simple, and large-scale batch production is easy to carry out; the operation such as shearing is not needed, the material is saved, and the cost is lower; the adhesive is better in fitting property due to integral hot-press molding, and has better tear resistance and environment resistance; in addition, the camouflage coating does not need to be printed on the fabric, the camouflage coating is directly printed on the first wave absorption coating, the number of layers of the fabric is reduced, the product is lighter, and the use experience is better.

Further, before the camouflage coating is printed on the wave-absorbing fabric, a second wave-absorbing coating is printed on the wave-absorbing fabric.

As for the radar fabric wave-absorbing structure, the wave-absorbing performance mainly depends on the wave-absorbing structure shape and size, the thickness of the first wave-absorbing coating, the second wave-absorbing coating and other factors; the camouflage wave-absorbing structural unit with the wedge-shaped structure is designed according to the wavelengths of radar waves X and Ku wave bands, so that resonance peaks generated by the X and Ku wave bands are superposed to achieve a broadband wave-absorbing effect.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

1. according to the invention, the camouflage wave absorbing units are integrally hot-pressed to form a wedge-shaped structure, so that the camouflage wave absorbing units are better in adhesiveness after hot-press molding and have better tear resistance and environment resistance; and the product is lighter and has better use experience.

2. According to the invention, the camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure, so that the preparation process is simple, and large-scale batch production is easier to realize; and the material is saved, and the cost is lower.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a wave-absorbing structure of a wedge-shaped radar fabric provided by an embodiment of the invention;

FIG. 2 is a measured reflectance curve (0 degrees, HH polarization) of the wave-absorbing radar fabric HLDB-111# provided in embodiment 1 of the present invention;

FIG. 3 is a measured reflectivity curve (0 ° and VV polarization) of the wave-absorbing radar fabric HLDB-111# provided in embodiment 1 of the present invention;

FIG. 4 is a measured reflectance curve (30 degrees, HH polarization) of the wave-absorbing radar fabric HLDB-111# provided in embodiment 1 of the present invention;

FIG. 5 is a measured reflectivity curve (30 degrees, VV polarization) of the wave-absorbing radar fabric HLDB-111# provided by embodiment 1 of the present invention;

FIG. 6 is a measured reflectivity curve (45 degrees, HH polarization) of the wave absorbing radar fabric HLDB-111# provided in embodiment 1 of the present invention;

FIG. 7 is a measured reflectivity curve (45 degrees, VV polarization) of the wave-absorbing radar fabric HLDB-111# provided by embodiment 1 of the invention;

FIG. 8 is an actually measured curve of the reflectivity of the radar absorbing fabric provided by the comparative example of the invention.

In the figure: 1-a camouflage wave absorbing structure unit, 101-a camouflage coating, 102-a first wave absorbing coating, 103-a fabric layer, 104-a second wave absorbing coating, 2-a reflection unit, 201-a metal coating and 202-a fabric layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments are not indicated by manufacturer, and are all commercially available

And purchasing the obtained conventional product.

The following describes a wedge-shaped radar fabric wave-absorbing structure, a preparation method thereof and a preparation method thereof provided by the embodiment of the invention.

Example 1

The embodiment provides a wedge radar fabric wave-absorbing structure, which comprises a camouflage wave-absorbing unit and a reflection unit, wherein the camouflage wave-absorbing unit and the reflection unit are sequentially arranged from top to bottom, and the camouflage wave-absorbing unit is integrally hot-pressed into a wedge structure. The camouflage wave absorbing unit comprises a camouflage coating with the thickness of 0.01mm, a second carbon black coating with the thickness of 0.10mm, a first carbon black coating with the thickness of 0.15mm and a fabric layer which are arranged in sequence from top to bottom; the reflection unit comprises an aluminum coating and a fabric layer which are arranged from top to bottom in sequence.

The embodiment also provides a preparation method of the wedge-shaped radar fabric wave-absorbing structure, which comprises the following steps:

s1: printing a first carbon black material coating on the fabric layer to form a wave-absorbing fabric; printing a second carbon black material coating and a camouflage coating on the wave-absorbing fabric to form a camouflage wave-absorbing unit;

s2: the prepared camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure to form a camouflage wave absorbing structural unit;

s3: and (3) carrying out hot-press molding on the camouflage wave-absorbing structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

Example 2

The embodiment provides a wedge radar fabric wave-absorbing structure, which comprises a camouflage wave-absorbing unit and a reflection unit, wherein the camouflage wave-absorbing unit and the reflection unit are sequentially arranged from top to bottom, and the camouflage wave-absorbing unit is integrally hot-pressed into a wedge structure. The camouflage wave absorbing unit comprises a camouflage coating with the thickness of 0.02mm, a second carbon black coating with the thickness of 0.12mm, a first carbon black coating with the thickness of 0.14mm and a fabric layer which are arranged in sequence from top to bottom; the reflection unit comprises an aluminum coating and a fabric layer which are arranged from top to bottom in sequence.

The embodiment also provides a preparation method of the wedge-shaped radar fabric wave-absorbing structure, which comprises the following steps:

s1: printing a first carbon black material coating on the fabric layer to form a wave-absorbing fabric; printing a second carbon black material coating and a camouflage coating on the wave-absorbing fabric to form a camouflage wave-absorbing unit;

s2: the prepared camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure to form a camouflage wave absorbing structural unit;

s3: and (3) carrying out hot-press molding on the camouflage wave-absorbing structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

Example 3

The embodiment provides a wedge radar fabric wave-absorbing structure, which comprises a camouflage wave-absorbing unit and a reflection unit, wherein the camouflage wave-absorbing unit and the reflection unit are sequentially arranged from top to bottom, and the camouflage wave-absorbing unit is integrally hot-pressed into a wedge structure. The camouflage wave absorbing unit comprises a camouflage coating with the thickness of 0.01mm, a second carbon black coating with the thickness of 0.10mm, a first carbon black coating with the thickness of 0.13mm and a fabric layer which are sequentially arranged from top to bottom; the reflection unit comprises an aluminum coating and a fabric layer which are arranged from top to bottom in sequence.

The embodiment also provides a preparation method of the wedge-shaped radar fabric wave-absorbing structure, which comprises the following steps:

s1: printing a first carbon black material coating on the fabric layer to form a wave-absorbing fabric; printing a second carbon black material coating and a camouflage coating on the wave-absorbing fabric to form a camouflage wave-absorbing unit;

s2: the prepared camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure to form a camouflage wave absorbing structural unit;

s3: and (3) carrying out hot-press molding on the camouflage wave-absorbing structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

Example 4

The embodiment provides a wedge radar fabric wave-absorbing structure, which comprises a camouflage wave-absorbing unit and a reflection unit, wherein the camouflage wave-absorbing unit and the reflection unit are sequentially arranged from top to bottom, and the camouflage wave-absorbing unit is integrally hot-pressed into a wedge structure. The camouflage wave absorbing unit comprises a camouflage coating with the thickness of 0.02mm, a second carbon black coating with the thickness of 0.11mm, a first carbon black coating with the thickness of 0.15mm and a fabric layer which are arranged in sequence from top to bottom; the reflection unit comprises an aluminum coating and a fabric layer which are arranged from top to bottom in sequence.

The embodiment also provides a preparation method of the wedge-shaped radar fabric wave-absorbing structure, which comprises the following steps:

s1: printing a first carbon black material coating on the fabric layer to form a wave-absorbing fabric; printing a second carbon black material coating and a camouflage coating on the wave-absorbing fabric to form a camouflage wave-absorbing unit;

s2: the prepared camouflage wave absorbing units are integrally hot-pressed into a wedge-shaped structure to form a camouflage wave absorbing structural unit;

s3: and (3) carrying out hot-press molding on the camouflage wave-absorbing structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

Comparative example

The comparison example provides a wedge radar fabric wave-absorbing structure, which comprises a camouflage unit and a reflection unit, wherein the camouflage unit and the reflection unit are sequentially arranged from top to bottom, and the camouflage unit is integrally hot-pressed into a wedge structure. The camouflage unit comprises a camouflage coating and a fabric layer which are arranged from top to bottom in sequence; the thickness of the camouflage coating is 0.02 mm. The reflection unit comprises an aluminum coating and a fabric layer which are arranged from top to bottom in sequence.

The embodiment also provides a preparation method of the wedge-shaped radar fabric wave-absorbing structure, which comprises the following steps:

s1: printing a camouflage coating on the fabric layer to form a camouflage unit;

s2: integrally hot-pressing the prepared camouflage units into a wedge-shaped structure to form camouflage structure units;

s3: and carrying out hot press molding on the camouflage structure unit and the reflection unit to obtain the wedge-shaped radar fabric wave-absorbing structure.

Examples of the experiments

Taking the wedge-shaped radar fabric wave-absorbing structure samples prepared according to the embodiment 1 and the comparative example, and testing the reflectivity of the samples according to the GJB2038A-2011 method; the results are shown in FIGS. 2 to 8.

As can be seen from FIGS. 2 to 7: the wedge-shaped radar fabric wave-absorbing structure sample prepared in the embodiment 1 is not more than-8.5 dB (HH polarization) in the range of 8-18 GH; less than or equal to-8.7 dB (VV polarization) in the range of 8-18 GH; when the incident angle is 30 degrees, the HH polarization is less than or equal to-9.4 dB (HH polarization) in the range of 8-18 GH (see figure 4); less than or equal to-6.2 dB (VV polarization) in the range of 8-18 GH; when the incident angle is 45 degrees, the HH polarization is less than or equal to-5.3 dB in the range of 8-18 GH; less than or equal to-6.3 dB (VV polarization) in the range of 8-18 GH;

as can be seen from fig. 8: the wedge-shaped radar fabric wave-absorbing structure sample prepared in the comparative example is not provided with the first wave-absorbing coating and the second wave-absorbing coating, the reflectivity is less than or equal to minus 3dB in the range of 8-18 GH wave bands, the reflectivity is basically 0, and no wave-absorbing effect exists;

therefore, the wave absorbing structure of the wedge-shaped radar fabric prepared by the method can achieve a broadband wave absorbing effect of 8-18 GH (GH) wave bands, and has good oblique incidence performance; the wave absorbing performance is good, and the absorption frequency band is wide.

According to the wedge-shaped radar fabric wave-absorbing structure and the preparation method thereof, the prepared camouflage wave-absorbing units are integrally hot-pressed into a wedge-shaped structure, so that a camouflage wave-absorbing structural unit is formed; the preparation process is simple and easy, and large-scale batch production is easy to carry out; the operation such as shearing is not needed, the material is saved, and the cost is lower; the adhesive is better in fitting property due to integral hot-press molding, and has better tear resistance and environment resistance; the product is lighter and has better use experience.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.