阅读说明：本技术 一种植物隐身材料及其制作方法 (Plant stealth material and preparation method thereof ) 是由 姜耘 夏冰晖 夏小军 于 2018-06-01 设计创作，主要内容包括：本发明涉及一种植物隐身材料及其制作方法,具体涉及一种丝瓜络隐身材料及其制作方法,植物隐身材料由丝瓜络单元和电磁屏蔽布构成,所述丝瓜络单元部分浸渍吸波液,所述的丝瓜络单元分布并固定在电磁屏蔽布的上表面。本发明提供的制作方法包括筛选、裁剪、浸渍吸波液、烘干、分切、缝制的步骤,流程简单,操作方便,本发明的产品具有微波宽频带隐身性能、可见光/近红外伪装和热红外隐身功能以及电磁屏蔽性能,还具有密度小、柔性、强度大、耐高低温、绿色环保、使用寿命长等特点。(The invention relates to a plant stealth material and a manufacturing method thereof, in particular to a loofah sponge stealth material and a manufacturing method thereof. The manufacturing method provided by the invention comprises the steps of screening, cutting, dipping wave absorbing liquid, drying, cutting and sewing, the process is simple, the operation is convenient, and the product has the functions of microwave broadband stealth, visible light/near infrared camouflage and thermal infrared stealth and electromagnetic shielding, and also has the characteristics of small density, flexibility, high strength, high and low temperature resistance, environmental protection, long service life and the like.)

1. The plant stealth material is composed of a loofah sponge unit and electromagnetic shielding cloth, and is characterized in that the loofah sponge unit is partially soaked in wave absorption liquid, and is distributed and fixed on the upper surface of the electromagnetic shielding cloth.

2. The plant stealth material of claim 1, wherein the loofah sponge unit is uniformly fixed on the upper surface of the electromagnetic shielding cloth by means of pasting or sewing.

3. The plant stealth material according to claim 1 or 2, wherein the loofah sponge unit is formed by cutting loofah in a vascular bundle or a fiber mesh structure, and the cut loofah sponge unit is a triangular prism, each triangular prism comprising a complete fan-shaped cavity.

4. The plant stealth material of claim 3, wherein the loofah sponge units are transversely distributed on the electromagnetic shielding cloth, the connection surface with the electromagnetic shielding cloth is rectangular, and the loofah sponge units are regularly distributed on the electromagnetic shielding cloth according to the rectangular size of the bottom surface.

5. The plant camouflage material of claim 4, wherein the loofah sponge units are distributed in a staggered manner or in a parallel manner.

6. The plant stealth material of claim 5, wherein the loofah sponge units are vertically distributed, the bottom surfaces of the loofah sponge units are square, and the side length of each loofah sponge unit is equal to the length of the bottom side of the triangle on the side surface of the loofah sponge unit.

7. The plant stealth material of claim 1, wherein the loofah sponge unit is partially impregnated with the wave-absorbing liquid, partially not impregnated with the wave-absorbing liquid, the lower half of the loofah sponge unit is impregnated with the wave-absorbing liquid, the bottom surface of the loofah sponge unit is connected with the electromagnetic shielding cloth, and the upper half of the loofah sponge unit, which faces the free space, is not impregnated with the wave-absorbing liquid.

8. The plant stealth material of claim 7, wherein the height of the partial loofah sponge units impregnated with the wave-absorbing liquid is 2/3 of the overall thickness of the plant stealth material, and the height of the side surfaces of the partial loofah sponge units not impregnated with the wave-absorbing liquid is 1/3 of the overall thickness of the plant stealth material.

9. The plant stealth material of claim 8, wherein the height of the partial loofah sponge units impregnated with the wave-absorbing liquid is 1/2 of the overall thickness of the plant stealth material, and the height of the side surfaces of the partial loofah sponge units not impregnated with the wave-absorbing liquid is 1/2 of the overall thickness of the plant stealth material.

10. A method of making the stealth material of claim 1 comprising the steps of:

a, screening, namely selecting loofah sponge with proper diameter, cutting off two ends, and reserving a cylinder with a regular middle part;

cutting the loofah into strip loofah sponge according to the number of the vascular bundles of the loofah sponge;

c, soaking the wave absorption liquid, wherein part of the loofah sponge absorbs the wave absorption liquid, and the rest part of the loofah sponge is in a natural state;

d, drying, namely putting the loofah soaked with the wave absorbing liquid into a drying oven for drying, and repeating the steps C and D as required;

e, cutting, namely cutting the soaked and dried strip loofah into rectangular or square loofah units according to the requirement;

f, sewing, namely sewing the loofah sponge units on the electromagnetic shielding cloth in parallel.

Technical Field

The invention relates to a plant stealth material and a manufacturing method thereof, in particular to a loofah sponge stealth material and a manufacturing method thereof.

Background

At present, the types of camouflage/stealth materials commonly used at home and abroad mainly comprise: the wave-absorbing coating, the camouflage net, the covering cloth, the composite structure material and the like, and the materials of the types have relatively mature technology, wide application range, various characteristics and different application occasions, but belong to non-plant materials. In recent years, metamaterials and superstructure materials have become a research hotspot in the technical field of camouflage and stealth, but the technical problems of multi-spectrum camouflage and microwave broadband stealth are still not solved. The hyperspectral detection equipment can distinguish whether the ground background is a high polymer material covering (covering cloth and composite material) or vegetation in the nature. Because the vegetation in the nature is weak in flexibility, high and low temperature resistance, weather resistance and the like, and weak in machinability, and the focus point of the camouflage stealth material is mainly on the bionic organic material, the wave-absorbing composite bionic grass disclosed in the prior art [ CN206330484U ], and the stealth material made of the bionic organic material provided by [ CN106751276A ] are used for camouflage as vegetation in the nature so as to hinder the resolution effect of hyperspectral detection equipment, but the natural camouflage effect of the vegetation in the nature cannot be achieved.

Disclosure of Invention

Based on the above contents, the invention aims to solve the problems of realizing various stealths such as microwave broadband stealth performance, visible light/near infrared camouflage, thermal infrared stealth, electromagnetic shielding performance and the like, and correspondingly has the characteristics of small density, good flexibility, high strength, high and low temperature resistance, easiness in processing, long service life and the like.

In order to achieve the purpose, the invention adopts the technical scheme that: a plant stealth material comprises a loofah unit and electromagnetic shielding cloth, wherein the loofah unit is partially soaked in wave absorption liquid, and is distributed and fixed on the upper surface of the electromagnetic shielding cloth.

Furthermore, the loofah sponge unit can be uniformly fixed on the upper surface of the electromagnetic shielding cloth in a sticking or sewing mode. It will be understood by those skilled in the art that the attachment means includes, but is not limited to, attachment with a solid, liquid adhesive or a mixture thereof, and the stitching means includes, but is not limited to, stitching with a needle or thread or other material.

Furthermore, the loofah sponge unit is formed by cutting loofah with a vascular bundle or a fiber net structure, the cut loofah sponge unit is a triangular prism, and each triangular prism comprises a complete fan-shaped cavity. The triangular prisms are transversely arranged, so that the bottom surfaces of the triangular prisms are rectangular and can be regularly arranged and distributed on the electromagnetic shielding cloth, and the loofah sponge units are conveniently and fixedly connected with the electromagnetic shielding cloth. The loofah sponge units are transversely arranged, namely triangular prisms are transversely arranged and distributed, the side surfaces of the triangular prisms are triangular, and the vertexes of the triangular prisms are the wave crests of the plant stealth material. The triangular prisms and the triangular prisms are arranged to form grooves, namely the wave troughs of the stealth material.

Preferably, the loofah sponge units are distributed on the electromagnetic shielding cloth in a staggered distribution and a parallel distribution. Furthermore, when the staggered distribution is selected, the vertical distribution is preferred, in which case the bottom surface of the loofah sponge unit is required to be square, and the side length of the square is equal to that of the bottom side of the triangle at the side.

Preferably, the loofah sponge unit is partially soaked in the wave absorbing liquid, partially not soaked in the wave absorbing liquid, the lower half part of the loofah sponge unit is soaked in the wave absorbing liquid, the bottom surface of the loofah sponge unit is connected with the electromagnetic shielding cloth, and the upper half part of the loofah sponge unit is not soaked in the wave absorbing liquid and faces the free space.

Furthermore, the height of the part of the loofah sponge units soaked with the wave absorbing liquid is 2/3 of the whole thickness of the plant stealth material, and the height of the side surface of the part of the loofah sponge units not soaked with the wave absorbing liquid is 1/3 of the whole thickness of the plant stealth material.

The invention also provides a preparation method of the plant stealth material, which comprises the following steps: a, screening, namely selecting loofah sponge with proper diameter, cutting off two ends of the loofah sponge, and keeping a cylinder with a regular middle part; d, drying, namely putting the loofah soaked with the wave absorbing liquid into a drying oven for drying, and repeating the step C and the step D as required; e, cutting, namely cutting the soaked and dried strip loofah into rectangular or square loofah units according to the requirement; f, sewing, namely sewing the loofah sponge units on the electromagnetic shielding cloth in parallel.

The loofah sponge is a natural plant, and the molecular structure of the loofah sponge contains water molecules, so that the reconnaissance of a hyperspectral satellite can be prevented; the loofah sponge is a vascular bundle and fiber net structure, has the physical characteristics of diffuse scattering and interference loss after absorbing the wave-absorbing material, belongs to an electrical loss material, and has good electrical property consistency; the wave absorbing liquid and the camouflage paint both use water-based polyurethane as a carrier, and after the loofah sponge absorbs the wave absorbing material and the camouflage paint, the camouflage/stealth material does not fade after being soaked in water and does not slag after being extruded, thereby ensuring good engineering application efficiency. The loofah sponge is cut, cut and sewn into an impedance matching interface type material with a rectangular bottom and a triangular cone upper, so that the microwave stealth frequency band is greatly widened, and the microwave absorption rate is improved.

The manufacturing method provided by the invention has clear flow and convenient operation, and the product plant stealth material manufactured by the method has the following beneficial effects of realizing microwave broadband stealth, thermal infrared stealth, optical/near infrared camouflage and electromagnetic shielding functions, and simultaneously has the characteristics of small density, good flexibility, high strength, high and low temperature resistance, environmental protection and long service life. Especially, natural loofah sponge facing free space has the same color and spectrum, and can prevent the investigation of an optical/near infrared detector, especially the investigation of a hyperspectral detector.

Drawings

Fig. 1 is a cross-sectional view of the camouflage material according to the first embodiment, wherein reference numeral 1 is an electromagnetic shielding cloth, 2 and 2' are loofah sponge units, 3 is a portion of the loofah sponge unit which is impregnated with the wave absorbing liquid, 4 is a portion of the loofah sponge unit which is not impregnated with the wave absorbing liquid, and 5 is a fan-shaped cavity of the loofah sponge unit.

Fig. 2 is a side view of the stealth material according to the second embodiment, where reference numeral 6 is an electromagnetic shielding cloth, reference numeral 7 is a loofah sponge unit distributed in a transverse direction, and reference numeral 7' is a loofah sponge unit distributed in a longitudinal direction.

Fig. 3 is a top view of the stealth material according to the second embodiment, where reference numeral 6 is an electromagnetic shielding cloth, reference numeral 7 is a loofah sponge unit distributed in a transverse direction, reference numeral 7 ' is a loofah sponge unit distributed in a longitudinal direction, reference numeral 3 ' is a portion of the loofah sponge unit immersed in the wave-absorbing liquid, and reference numeral 4 ' is a portion of the loofah sponge unit not immersed in the wave-absorbing liquid.

Fig. 4 is a flow chart of the manufacturing process of the plant stealth material.

Detailed Description

The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.