WO2021203681A1

WO2021203681A1 - Optical camouflaging composite material

Info

Publication number: WO2021203681A1
Application number: PCT/CN2020/124442
Authority: WO
Inventors: 朱昊枢; 叶瑞; 左志成; 刘朋; 任家安; 陈林森; 朱志坚
Original assignee: 苏州苏大维格科技集团股份有限公司; 江苏维格新材料科技有限公司
Priority date: 2020-04-07
Filing date: 2020-10-28
Publication date: 2021-10-14
Also published as: CN212181067U

Abstract

An optical camouflaging composite material (10), used for attaching onto a target object to be covered and for adhering to the target object to be covered, the material comprising a plurality of first film layers (11), a plurality of second film layers (12), and a pressure-sensitive adhesive layer (13). The plurality of first film layers (11) and the plurality of second film layers (12) are alternately stacked, the outermost layer of the optical camouflaging composite material (10) away from the target object to be covered being a first film layer (11), and the refractive index of the first film layers (11) being greater than the refractive index of the second film layers (12). The pressure-sensitive adhesive layer (13) is positioned on the outer side of a first film layer (11) or a second film layer (12) near to the target object to be covered, and the pressure-sensitive adhesive layer (13) comprises a plurality of pressure-sensitive adhesive parts (131) arranged at intervals, gap parts (132) being formed between adjacent two pressure-sensitive adhesive parts (131) by a gas (132). By means of the pressure-sensitive adhesive parts (131) arranged at intervals of the pressure-sensitive adhesive layer (13) and the gaps formed between adjacent two pressure-sensitive adhesive parts (131) by air (232), compared to providing pressure-sensitive adhesive on the entirety of an object, the provision of an air structure is able to create a greater difference in refractive index between the pressure-sensitive adhesive layer (13) and the lower surface of the plurality of layers of film. The invention thus features an increased reflectivity and a broadened range of reflection, thus having a better concealing effect.

Description

Optical stealth composite

This application claims the priority of the Chinese patent application whose application date is April 07, 2020 and the application number is 202020488182.2, the entire content of which is incorporated into this application by reference.

Technical field

The utility model relates to an optical stealth composite material.

Background technique

With the explosive development of the communication industry, it is necessary to continuously increase the capacity and quantity of signal transmission and transmission devices in different communication systems to catch up with the pace of new demands. The aesthetics of each signal transmission and transmission device has become an urgent solution. The title. Therefore, it is imperative to provide an effective optical stealth composite material.

Utility model content

The purpose of the utility model is to provide an optical stealth composite material, which can fit the target to be covered and conceal the original appearance of the covered target, increase the refractive index deviation between layers, increase the reflectivity, and widen the reflection range , Has a better concealment effect.

In order to achieve the above purpose, the present invention provides the following technical solutions: an optical stealth composite material, which is used to attach to and adhere to the target to be covered, and includes several first film layers and several A second film layer and a pressure-sensitive adhesive layer; the plurality of first film layers and a plurality of second film layers are alternately stacked, and the outermost of the optical stealth composite material away from the target to be covered is the first film layer, The refractive index of the first film layer is greater than the refractive index of the second film layer; the pressure-sensitive adhesive layer is located outside the first film layer or the second film layer close to the target to be covered, so The pressure-sensitive adhesive layer includes a plurality of pressure-sensitive adhesive parts arranged at intervals, and the space between two adjacent pressure-sensitive adhesive parts is formed by gas.

Further, the cross-sectional shape of the pressure-sensitive adhesive part is a square, a rectangle, a circle, a triangle, a polygon, or an irregular shape, or a combination of at least two or more arbitrary shapes.

Further, the gas is air.

Further, the ratio of the pressure-sensitive adhesive portion to the area of the pressure-sensitive adhesive layer is less than the ratio of the spacer portion to the area of the pressure-sensitive adhesive layer, and the ratio of the pressure-sensitive adhesive portion to the area of the pressure-sensitive adhesive layer is less than or equal to 30% .

Further, the refractive index difference between the first film layer and the second film layer is 0.05-2.

Further, the first film layer is an inorganic non-metal material film layer, and the second film layer is a flexible film layer, or at least one layer is a flexible film layer, and the remaining layers are a transparent resin layer.

Further, the material of the first film layer is any one of zinc sulfide, titanium dioxide, and niobium pentoxide, and a plurality of the first film layers are made of the same material, or at least two layers of the first film layer are made of materials Different; the flexible film layer is made of any one of PC, PET, PMMA, and several of the second film layers have the same material, or at least two of the second film layers have different materials.

Further, the first film layer and the second film layer are both inorganic non-metallic material film layers.

Further, the material of the first film layer is any one of zinc sulfide, titanium dioxide, and niobium pentoxide, and a plurality of the first film layers are made of the same material, or at least two of the first film layers are made of material Different; the material of the second film layer is any one of magnesium fluoride, silicon dioxide, aluminum fluoride, and aluminum oxide; a plurality of the second film layers have the same material, or at least two layers of the second The material of the film is different.

Further, the optical stealth composite material further includes a transparent protective layer located on the upper side of the first film layer away from the target to be covered.

Further, a release layer is provided on the side of the pressure-sensitive adhesive layer close to the target to be covered. The beneficial effects of the utility model are:

In the utility model, the pressure-sensitive adhesive part is arranged at intervals by the pressure-sensitive adhesive layer, and the space between two adjacent pressure-sensitive adhesive parts is formed by air. Compared with all the pressure-sensitive adhesives, the air structure can make the pressure-sensitive adhesive layer The first film layer or the second film layer adjacent to it has greater refractive index deviation, higher reflectivity, wider reflection range, and better concealment effect.

The above description is only an overview of the technical solution of the present utility model. In order to have a clearer understanding of the technical means of the present utility model and can be implemented in accordance with the content of the specification, the following is a detailed description of the preferred embodiment of the present utility model with accompanying drawings. Rear.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of the optical stealth composite material in the utility model and the first embodiment.

2 is a schematic diagram of the structure of the optical stealth composite material in the second embodiment.

Detailed ways

The specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

Please refer to FIG. 1, the optical stealth composite material 10 shown in a preferred embodiment of the present invention is used for attaching to the target to be covered, and is attached to the target to be covered. The specific optical material can be Form the same shape as the target to be covered. The target to be covered may be a communication element, such as a mobile phone screen, which is not specifically limited here. The optical stealth composite material 10 includes a plurality of first film layers 11, a plurality of second film layers 12 and a pressure-sensitive adhesive layer 13. The plurality of first film layers 11 and a plurality of second film layers 12 are alternately stacked and arranged, and the first film layer 11 is located on the side far away from the target to be covered and located outside the second film layer 12. The number of layers of the plurality of first film layers 11 and the plurality of second film layers 12 may be the same. For example, the first film layer 11 has 4 layers, and the second film layer 12 has 4 layers, which is not limited here. At this time, the outermost side far away from the target to be covered is the first film layer 11, and the outer side of the pressure-sensitive adhesive layer 13 close to the target to be covered is the second film layer 12. It can also be that the number of the first film layer 11 is one more than the number of the second film layer 12. For example, the first film layer 11 has 5 layers and the second film layer 12 has 4 layers; or the first film layer 11 has 3 layers, The two film layers are three layers, which are not specifically limited here. At this time, the outermost side far away from the target to be covered is the first film layer 11, and the outer side of the pressure-sensitive adhesive layer 13 close to the target to be covered is also the first film layer 11. The refractive index of the first film layer 11 is greater than the refractive index of the second film layer 12, and the difference in refractive index between layers is 0.05-2. The purpose of this setting is: after the incident light passes through the refraction and reflection of each interface, the reflectivity of the reflected light is greatly increased, and the reflected light is displayed in a wide area, so that the optical stealth material has high reflectivity and a wide reflection area, thereby enabling observation The person observes the reflected light from the surrounding environment in a larger range, thus concealing the original appearance of the covering well. The pressure-sensitive adhesive layer 13 is located on the outer side of the first film layer 11 or the second film layer 12 close to the target to be covered, and the pressure-sensitive adhesive layer 13 includes a plurality of pressure-sensitive adhesive portions 131 arranged at intervals, The gas 132 forms a space between two adjacent pressure-sensitive adhesive parts 131. The purpose of this arrangement is: compared to laying pressure-sensitive adhesives entirely, the pressure-sensitive adhesive portion 131 is provided so that the pressure-sensitive adhesive layer 13 and the lower surface of the adjacent first film layer or the second film layer have a larger size. Refractive index deviation, so that higher reflectivity can be achieved, and the concealment effect is better. In addition, the amount of pressure-sensitive adhesive is greatly reduced, which is cost-saving and environmentally friendly.

In detail, a space between two adjacent pressure-sensitive adhesive portions 131 in the pressure-sensitive adhesive layer 13 is formed by a gas 132, and the gas 132 is air. The cross-sectional shape of the pressure-sensitive adhesive portion 131 is a square, a rectangle, a circle, a triangle, a polygon, or an irregular shape, or a combination of at least two or more arbitrary shapes. The ratio of the pressure-sensitive adhesive portion 131 to the area of the pressure-sensitive adhesive layer 13 is less than the ratio of the spacer portion to the area of the pressure-sensitive adhesive layer 13, and the ratio of the pressure-sensitive adhesive portion 131 to the area of the pressure-sensitive adhesive layer 13 is less than or equal to 30%, preferably, the proportion is selected as 30%, which is not specifically limited here. At this time, the pressure-sensitive adhesive has a refractive index of 1.48 and air has a refractive index of 1.0. The first film layer 11 is an inorganic non-metal film layer. Specifically, the refractive index selection range of the first film layer 11 is greater than or equal to 2, which is not specifically limited here. The material of the first film layer 11 is selected to be zinc sulfide, titanium dioxide, and niobium pentoxide, so that the overall thickness of the material is small and the flexibility is good. It is true that in other embodiments, the material of the first film layer 11 may also be other, which depends on the situation and is not specifically limited here. The second film layer 12 may be an inorganic non-metal film layer or a film layer of other materials. Specifically, the selected range of the refractive index of the second film layer 12 is less than 2. The other material film layer is a flexible film layer or a transparent resin layer. When the second film layer 12 is a film layer of other materials, at least one layer is a flexible film layer, and the remaining layers are transparent resin layers. Specifically, the material of the flexible film layer is selected as PC, PET, PMMA, which is not specifically limited here. When the second film layer 12 is an inorganic non-metal film layer, the material is selected from magnesium fluoride, silicon dioxide, aluminum fluoride, and aluminum oxide.

The materials of the plurality of first film layers 11 may be the same, or the materials of at least two of the first film layers 11 may be different; the materials of the plurality of second film layers 12 may be the same or at least two of the first film layers 11 The material is different. That is, when the number of the first film layer 11 is two or more, the material of the first film layer 11 may be the same or not completely the same or completely different; when the number of the second film layer 12 is two or more, the first film layer 11 The materials of the two film layers 12 are the same or not completely the same or completely different.

It should be noted that in practical applications, the optical stealth composite material 10 further includes a transparent protective layer (see FIG. 3) and a release layer 14. The arrangement of the transparent protective layer is as follows: the transparent protective layer is located on the outer side of the first film layer 11 away from the target object to be covered. The transparent protective layer is a transparent resin coating or a film layer. Through this setting, the abrasion resistance, water resistance, weather resistance, and UV resistance of the optical material can be effectively improved.

The release layer 14 is arranged in a manner that the release layer 14 is provided on the side of the pressure-sensitive adhesive layer 13 close to the covering target. With this setting, the release layer is peeled off during use, and the pressure-sensitive adhesive layer 13 contacts the covering that needs to be concealed and is stuck on the surface of the covering.

The ultra-thin optical stealth material will be described in detail below with two specific embodiments.

Example one:

Referring to FIG. 1, the optical stealth composite material 10 in the first embodiment includes a plurality of first film layers 11, a plurality of second film layers 12, a pressure-sensitive adhesive layer 13 and a release layer 14. The plurality of first film layers 11 and a plurality of second film layers 12 are alternately stacked and arranged, and the first film layer 11 is located on the side far away from the target to be covered and located outside the second film layer 12. The pressure-sensitive adhesive layer 13 is located on the outer side of the first film layer 11 or the second film layer 12 close to the target to be covered, and the pressure-sensitive adhesive layer 13 includes a plurality of pressure-sensitive adhesive portions 131 arranged at intervals, A space 132 is formed between two adjacent pressure-sensitive adhesive portions 131 by gas, and the gas is selected as air. The first film layer 11 is provided with 4 layers, and the second film layer 12 is provided with 3 layers. The first film layer 11 is a high refractive index inorganic non-metallic material film layer, the material is selected to be titanium dioxide, the refractive index is 2.35, and it is prepared by vacuum magnetron sputtering. The second film layer 12 is a low refractive index inorganic non-metallic material film layer, and the specific material is selected as magnesium fluoride, and its refractive index is 1.38. It is prepared by vacuum magnetron sputtering, and the refractive index difference between layers is 0.97. The ratio of the pressure-sensitive adhesive portion 131 to the area of the pressure-sensitive adhesive layer 13 is selected to be 30%. At this time, the refractive index of the pressure-sensitive adhesive is 1.48 and the refractive index of the air is 1.0. Compared with all the pressure-sensitive adhesives, the spacers 132 can make the pressure-sensitive adhesive layer 13 and the lower surface of the multilayer film have a greater refractive index deviation, which can achieve higher reflectivity and better concealment effect. In addition, the amount of pressure-sensitive adhesive is greatly reduced, which is cost-saving and environmentally friendly.

Embodiment two:

Please refer to FIG. 3, the optical stealth composite material 20 in the second embodiment includes a plurality of first film layers 21, a plurality of second film layers 22, a pressure-sensitive adhesive layer 23, a transparent protective layer 25 and a release layer 24. The plurality of first film layers 21 and a plurality of second film layers 22 are alternately stacked and arranged, and the first film layer 21 is located on the side away from the target to be covered and located outside the second film layer 22. The pressure-sensitive adhesive layer 23 is located on the outer side of the first film layer 21 or the second film layer 22 close to the target to be covered, and the pressure-sensitive adhesive layer 23 includes a plurality of pressure-sensitive adhesive portions 231 arranged at intervals, The air 232 forms a space between two adjacent pressure-sensitive adhesive parts 231. The pressure-sensitive adhesive layer 23 is provided with a release layer 24 on the side close to the target to be covered. The transparent protective layer 25 is located on the upper side of the first film layer 21 away from the target to be covered. The first film layer 21 is provided with four layers, and the second film layer 22 is provided with three layers. The first film layer 21 is a high refractive index inorganic non-metallic material film layer, and the material is selected from titanium dioxide film, the refractive index is 2.35, and it is made by vacuum sputtering. The second film layer 22 is a low refractive index film layer of other materials, one of which is a flexible film layer 322, the material is selected as transparent mirror PET, the refractive index is 1.65, on the one hand as a low refractive index film layer, on the other hand as The base film plays a bearing role. The other two layers of the second film layer 22 are a transparent resin coating 221 with a refractive index of 1.5.

In summary:

In the utility model, the pressure-sensitive adhesive part is arranged at intervals by the pressure-sensitive adhesive layer, and the interval between two adjacent pressure-sensitive adhesive parts is formed by air. Compared with all the pressure-sensitive adhesives, the air structure can make the pressure-sensitive adhesive layer It has greater refractive index deviation from the lower surface of the multilayer film, the reflectivity is increased, the reflection range is widened, and it has a better concealment effect.

In the utility model, by setting the refractive index of the first film layer to be greater than that of the second film layer, the light rays are refracted and reflected by each interface after being incident, and the reflectivity of the reflected light is greatly increased, and the reflected light is displayed in a wide area. , So that the optical stealth material has high reflectivity and wide reflection area, so that the observer can observe the reflected light of the surrounding environment in a larger range, so as to well conceal the original appearance of the cover.

The utility model can effectively improve the abrasion resistance, water resistance, weather resistance and ultraviolet radiation resistance of the optical material by providing a transparent protective layer.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express a few implementation modes of the utility model, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the utility model, several modifications and improvements can be made, and these all fall within the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be subject to the appended claims.

Claims

An optical stealth composite material for attaching to and bonding with the target to be covered, and is characterized in that it includes a plurality of first film layers, a plurality of second film layers and a pressure-sensitive adhesive The plurality of first film layers and a plurality of second film layers are alternately stacked, the outermost of the optical stealth composite material away from the target to be covered is the first film layer, and the refractive index of the first film layer Greater than the refractive index of the second film layer; the pressure-sensitive adhesive layer is located on the outer side of the first film layer or the second film layer close to the target to be covered, and the pressure-sensitive adhesive layer includes a plurality of spaced arrangements In the pressure-sensitive adhesive part, a space is formed between two adjacent pressure-sensitive adhesive parts by gas.
The optical stealth composite material of claim 1, wherein the cross-sectional shape of the pressure-sensitive adhesive part is a square, a rectangle, a circle, a triangle, a polygon, or an irregular shape, or a combination of at least two or more arbitrary shapes. .
The optical stealth composite material of claim 1, wherein the gas is air.
The optical stealth composite material of claim 1, wherein the pressure-sensitive adhesive portion accounts for a smaller proportion of the area of the pressure-sensitive adhesive layer than the spacer portion accounts for the area of the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive portion The proportion of the area of the pressure-sensitive adhesive layer is less than or equal to 30%.
The optical stealth composite material of claim 1, wherein the refractive index difference between the first film layer and the second film layer is 0.05-2.
The optical stealth composite material of claim 1, wherein the first film layer is an inorganic non-metallic material film layer, and the second film layer is a flexible film layer, or at least one layer is a flexible film layer , The remaining layers are transparent resin layers.
The optical stealth composite material of claim 6, wherein the material of the first film layer is any one of zinc sulfide, titanium dioxide, and niobium pentoxide, and several of the first film layers have the same material , Or at least two of the first film layers are of different materials; the flexible film layer is made of any one of PC, PET, PMMA, and several of the second film layers have the same material, or at least two layers of the first film The materials of the two layers are different.
The optical stealth composite material of claim 1, wherein the first film layer and the second film layer are both inorganic non-metallic material film layers.
8. The optical stealth composite material of claim 8, wherein the material of the first film layer is any one of zinc sulfide, titanium dioxide, and niobium pentoxide, and several of the first film layers have the same material, Or at least two of the first film layers are made of different materials; the material of the second film layer is any one of magnesium fluoride, silicon dioxide, aluminum fluoride, and aluminum oxide; and a plurality of the second films The materials of the layers are the same, or the materials of at least two of the second film layers are different.
The optical stealth composite material of claim 1, wherein the optical stealth composite material further comprises a transparent protective layer, the transparent protective layer located on the upper side of the first film layer away from the target to be covered .
3. The optical stealth composite material of claim 1, wherein the pressure-sensitive adhesive layer is provided with a release layer on the side close to the target to be covered.