阅读说明：本技术 电磁屏蔽激光窃听阻断二合一膜及其制备方法 (Electromagnetic shielding laser eavesdropping blocking two-in-one film and preparation method thereof ) 是由 颜徐州 吴善武 仲从磊 于 2021-08-23 设计创作，主要内容包括：本发明涉及一种电磁屏蔽激光窃听阻断二合一膜及其制备方法,膜材包括顺序设置的防刮层、电磁屏蔽激光窃听阻断层、离型膜,所述电磁屏蔽激光窃听阻断层为激光窃听阻断基材层、电磁屏蔽层和压敏胶层的复合结构,或为基材层、电磁屏蔽层和激光窃听阻断压敏胶层的复合结构。本发明优选对激光有一定防护效果的材料作为电磁屏蔽材料,并以此为基础作为电磁屏蔽和激光窃听阻断二合一膜的电磁屏蔽部分,可以大大提高产品的可见光透射比,并减少激光阻断材料的使用,并对电磁屏蔽膜中的基材层或压敏胶层进行改进设计,形成激光窃听阻断基材层或激光窃听阻断压敏胶层,实现电磁屏蔽和激光窃听阻断二合一,结构简单,层数少,加工工艺简单。(The invention relates to an electromagnetic shielding laser eavesdropping blocking two-in-one film and a preparation method thereof. The invention preferably selects a material with a certain protective effect on laser as the electromagnetic shielding material, and on the basis, the material is used as the electromagnetic shielding part of the electromagnetic shielding and laser eavesdropping blocking two-in-one film, so that the visible light transmittance of the product can be greatly improved, the use of the laser blocking material is reduced, the substrate layer or the pressure sensitive adhesive layer in the electromagnetic shielding film is improved, the laser eavesdropping blocking substrate layer or the laser eavesdropping blocking pressure sensitive adhesive layer is formed, the two-in-one of the electromagnetic shielding and the laser eavesdropping blocking is realized, the structure is simple, the number of layers is small, and the processing technology is simple.)

1. The utility model provides an electromagnetic shield laser is eavesdropped and is blocked two unification membranes, its characterized in that, eavesdrop and block the layer, leave the type membrane including scratch-resistant layer, electromagnetic shield laser that the order set up, electromagnetic shield laser is eavesdropped and is blocked the composite construction that the layer blocked substrate layer, electromagnetic shield layer and pressure sensitive adhesive layer for laser is eavesdropped, or eavesdrop and block pressure sensitive adhesive layer's composite construction for substrate layer, electromagnetic shield layer and laser.

2. The electromagnetically shielded laser eavesdropping blocking two-in-one film as claimed in claim 1, wherein the laser eavesdropping blocking substrate layer is a substrate layer coated with a laser eavesdropping blocking layer or a substrate layer doped with a laser eavesdropping blocking material.

3. The electromagnetically shielded laser eavesdropping-blocking two-in-one film as claimed in claim 2, wherein the laser eavesdropping-blocking pressure sensitive adhesive layer is a laser eavesdropping-blocking material-doped pressure sensitive adhesive layer.

4. The electromagnetically shielded laser eavesdropping blocking two-in-one film as claimed in claim 3, wherein the laser eavesdropping blocking material comprises one or more of aluminum oxide, cerium oxide, lanthanum hexaboride, vanadium dioxide, zirconium oxide, zinc sulfide, Ag, Au, Al, copper oxide, cuprous oxide, ferrous oxide, cesium tungsten bronze, GZO, AZO, ATO, BTO, and ITO.

5. The electromagnetically shielded laser eavesdropping-blocking two-in-one film as claimed in claim 2, wherein the base material layer is PET, PVC, PVB, EVA, TPU, PP, PE, PC or PMMA.

6. The electromagnetically shielded laser eavesdropping blocking two-in-one film as claimed in claim 1, wherein the electromagnetically shielding layer is an AZO, Ag, AZO three-layer structure or an AZO, Ag, AZO five-layer structure prepared by magnetron sputtering.

7. A preparation method of an electromagnetic shielding laser eavesdropping blocking two-in-one film is characterized by comprising the following steps:

(1) coating a scratch-resistant layer on one side of the base material layer;

(2) dispersing the laser eavesdropping blocking material in a solvent, adding a pressure-sensitive adhesive to form a coating of a laser eavesdropping blocking layer, and coating the coating on the other layer of the substrate layer;

(3) and carrying out magnetron sputtering on the other substrate layer to form an electromagnetic shielding layer, combining the electromagnetic shielding layer with the laser blocking layer, and finally coating a pressure-sensitive adhesive on the outer side of the substrate layer and compounding the substrate layer with a release film.

8. A preparation method of an electromagnetic shielding laser eavesdropping blocking two-in-one film is characterized by comprising the following steps:

(1) adding the laser eavesdropping blocking material into the material of the base material layer to produce and prepare a laser eavesdropping blocking base material layer;

(2) magnetron sputtering an electromagnetic shielding layer on one side of the laser eavesdropping blocking substrate layer, and coating a scratch-resistant layer on the other side of the laser eavesdropping blocking substrate layer;

(3) and coating a pressure-sensitive adhesive on the outer side of the electromagnetic shielding layer and then compounding the electromagnetic shielding layer with a release film.

9. A preparation method of an electromagnetic shielding laser eavesdropping blocking two-in-one film is characterized by comprising the following steps:

(1) magnetron sputtering an electromagnetic shielding layer on one side of the base material layer, and coating a scratch-resistant layer on the other side of the base material layer;

(2) the laser eavesdropping blocking material is dispersed in the pressure-sensitive adhesive coating and coated on the electromagnetic shielding layer,

finally, compounding with a release film.

Technical Field

The invention relates to the technical field of electromagnetic shielding laser eavesdropping blockage, in particular to an electromagnetic shielding laser eavesdropping blockage two-in-one film and a preparation method thereof.

Background

At present, the latest secret divulging mode is 'laser eavesdropping', namely, the laser which is invisible to human eyes is used for hitting on an object, and the vibration of the object caused by sound is collected, so that the sound is restored. The laser eavesdropping blocking film can realize eavesdropping protection by a novel technical means of laser eavesdropping.

When the electronic equipment works, the electromagnetic leakage can be generated by radiating through a ground wire, a power wire, a signal wire, a parasitic electromagnetic signal or harmonic wave and the like. If the electromagnetic signals are received, the original information can be recovered through extraction processing, and information is lost. Computer information systems with security requirements must take care to prevent electromagnetic leakage. Methods that may be taken to protect against electromagnetic leakage from a computer system include passive methods, shielding methods, and noise interference methods. The source-inhibiting method solves the problem fundamentally by reducing or eliminating the emission of the electromagnetic leakage source of the computer, the shielding method achieves the purpose of electromagnetic information leakage protection by blocking the transmission and conduction paths, the noise method increases the difficulty of stealing and receiving leakage information by adding noise related to the information, and the electromagnetic shielding film is the representative function of the application of the shielding method.

When a security unit is arranged, electromagnetic shielding and laser eavesdropping are often required to be protected at the same time. The adhesive of the laser eavesdropping blocking film and the electromagnetic shielding film can not be well adhered to another product, so that the problems of layering, falling and the like can be easily caused, and the product formed by compounding the laser eavesdropping blocking film and the electromagnetic shielding film is large in thickness and number of layers. The traditional method is that two products are attached to the inner side of a glass chamber, and the other product is attached to the outer side of the glass chamber. But when running into high-rise building construction, to the outside construction, not only have the safety risk that high altitude construction brought, also cause the construction that the glass washing thoroughly leads to beautifully greatly to receive the influence, simultaneously, paste two-layer membrane on glass and can influence the daylighting, lead to indoor darker, the outdoor weather will shorten the life of product greatly in addition.

Disclosure of Invention

The invention aims to provide an electromagnetic shielding laser eavesdropping and blocking two-in-one film and a preparation method thereof, which are used for solving the problems that the laser eavesdropping and blocking film and the electromagnetic shielding film are respectively stuck on the inner side and the outer side of glass in the prior art, the construction is inconvenient and the service life is shortened, and simultaneously the problem that the normal lighting is influenced by the fact that two layers of films are stuck are relatively dark.

The invention preferably selects a material with a certain protective effect on laser as the electromagnetic shielding material, and on the basis, the material is used as the electromagnetic shielding part of the electromagnetic shielding and laser eavesdropping blocking two-in-one film, so that the visible light transmittance of the product can be greatly improved, and the use of the laser blocking material is reduced.

The invention provides an electromagnetic shielding laser eavesdropping blocking two-in-one film, which comprises a scratch-proof layer, an electromagnetic shielding laser eavesdropping blocking layer and a release film which are sequentially arranged, wherein the electromagnetic shielding laser eavesdropping blocking layer is of a composite structure of a laser eavesdropping blocking base material layer, an electromagnetic shielding layer and a pressure-sensitive adhesive layer, or of the base material layer, the electromagnetic shielding layer and the laser eavesdropping blocking pressure-sensitive adhesive layer.

Further, the laser eavesdropping blocking substrate layer is a substrate layer coated with a laser eavesdropping blocking layer or a substrate layer doped with a laser eavesdropping blocking material.

Further, the laser eavesdropping blocking pressure sensitive adhesive layer is a pressure sensitive adhesive layer doped with a laser eavesdropping blocking material,

further, the laser eavesdropping blocking material comprises one or more of aluminum oxide, cerium oxide, lanthanum hexaboride, vanadium dioxide, zirconium oxide, zinc sulfide, Ag, Au, Al, copper oxide, cuprous oxide, ferrous oxide, cesium tungsten bronze, GZO, AZO, ATO, BTO and ITO.

Further, the substrate layer is PET, PVC, PVB, EVA, TPU, PP, PE, PC or PMMA.

Furthermore, the electromagnetic shielding layer is an AZO, Ag and AZO three-layer structure or an AZO, Ag, AZO, Ag and AZO five-layer structure prepared by magnetron sputtering.

The invention also provides a preparation method of the electromagnetic shielding laser eavesdropping blocking two-in-one film, which comprises the following steps:

(1) coating a scratch-resistant layer on one side of the base material layer;

(2) dispersing the laser eavesdropping blocking material in a solvent, adding a pressure-sensitive adhesive to form a coating of a laser eavesdropping blocking layer, and coating the coating on the other layer of the substrate layer;

(3) and carrying out magnetron sputtering on the other substrate layer to form an electromagnetic shielding layer, combining the electromagnetic shielding layer with the laser blocking layer, and finally coating a pressure-sensitive adhesive on the outer side of the substrate layer and compounding the substrate layer with a release film.

The invention also provides a preparation method of the electromagnetic shielding laser eavesdropping blocking two-in-one film, which comprises the following steps:

(1) adding the laser eavesdropping blocking material into the material of the base material layer to produce and prepare a laser eavesdropping blocking base material layer;

(2) magnetron sputtering an electromagnetic shielding layer on one side of the laser eavesdropping blocking substrate layer, and coating a scratch-resistant layer on the other side of the laser eavesdropping blocking substrate layer;

(3) and coating a pressure-sensitive adhesive on the outer side of the electromagnetic shielding layer and then compounding the electromagnetic shielding layer with a release film.

The invention also provides a preparation method of the electromagnetic shielding laser eavesdropping blocking two-in-one film, which comprises the following steps:

(1) magnetron sputtering an electromagnetic shielding layer on one side of the base material layer, and coating a scratch-resistant layer on the other side of the base material layer;

(2) and dispersing the laser eavesdropping blocking material in the pressure-sensitive adhesive coating, coating the pressure-sensitive adhesive coating on the electromagnetic shielding layer, and finally compounding the electromagnetic shielding layer and the release film.

The technical scheme of the invention has the beneficial effects that:

the invention preferably selects a material with a certain protective effect on laser as the electromagnetic shielding material, and on the basis, the material is used as the electromagnetic shielding part of the electromagnetic shielding and laser eavesdropping blocking two-in-one film, so that the visible light transmittance of the product can be greatly improved, and the use of the laser blocking material is reduced; in addition, carry out the improved design to substrate layer or pressure sensitive adhesive layer among the current electromagnetic shield membrane, form laser and eavesdrop and block the substrate layer or laser and eavesdrop and block pressure sensitive adhesive layer for the membrane material possesses electromagnetic shield and laser simultaneously and eavesdrops and blocks the function, realizes electromagnetic shield and laser and eavesdrops and blocks two unifications, simple structure moreover, and the number of piles is few, and processing technology is simple.

Drawings

FIG. 1 is a schematic structural diagram of an electromagnetic shielding laser eavesdropping blocking two-in-one film according to an embodiment of the invention;

fig. 2 is a schematic structural view of an electromagnetic shielding laser eavesdropping blocking two-in-one film according to another embodiment of the invention.

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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

The embodiment provides an electromagnetic shield laser is eavesdropped and is blocked two unification membranes, eavesdrop and block the layer, leave type membrane including the anti-scratch layer that sets up in proper order, electromagnetic shield laser is eavesdropped and is blocked the layer and eavesdrop the composite construction that blocks substrate layer, electromagnetic shield layer and pressure sensitive adhesive layer for laser as shown in figure 1, or eavesdrop the composite construction that blocks pressure sensitive adhesive layer for substrate layer, electromagnetic shield layer and laser, as shown in figure 2.

Specifically, the laser eavesdropping blocking base material layer is a base material layer coated with a laser eavesdropping blocking layer or a base material layer doped with a laser eavesdropping blocking material, the laser eavesdropping blocking pressure-sensitive adhesive layer is a pressure-sensitive adhesive layer doped with a laser eavesdropping blocking material,

the laser eavesdropping blocking material comprises one or more of aluminum oxide, cerium oxide, lanthanum hexaboride, vanadium dioxide, zirconium oxide, zinc sulfide, Ag, Au, Al, copper oxide, cuprous oxide, ferrous oxide, cesium tungsten bronze, GZO, AZO, ATO, BTO and ITO, and the laser eavesdropping blocking material enables the transmittance of an infrared band (900 plus 1800nm) to be less than 0.001 through reflection and absorption.

The substrate layer is PET, PVC, PVB, EVA, TPU, PP, PE, PC or PMMA, can also select other transparent film materials.

The electromagnetic shielding layer is of a three-layer structure of AZO with the thickness of 45nm, Ag with the thickness of 16-20nm and AZO with the thickness of 45nm or a five-layer structure of AZO with the thickness of 92nm, Ag with the thickness of 16-20nm, AZO with the thickness of 92nm, Ag with the thickness of 16-20nm and AZO with the thickness of 92 nm.

Example 1

A preparation method of an electromagnetic shielding laser eavesdropping blocking two-in-one film comprises the following steps:

(1) coating a scratch-resistant layer on one side of the base material layer, wherein the thickness of the scratch-resistant layer is 3 micrometers, and the thickness of the base material layer is 23 micrometers;

(2) uniformly dispersing a laser eavesdropping blocking material in a solvent containing pressure-sensitive adhesive to form a coating of a laser eavesdropping blocking layer, and coating the coating on the other layer of the substrate layer, wherein the formula of the laser eavesdropping blocking material comprises cesium tungsten bronze, ATO and ITO in a ratio of 1:1:1, the total addition amount of the cesium tungsten bronze, ATO and ITO is 4 g/square meter, and the thickness of the laser eavesdropping blocking layer is 6 mu m;

(3) and carrying out magnetron sputtering on an electromagnetic shielding layer on the other substrate layer, combining the electromagnetic shielding layer with the laser blocking layer, and finally coating a pressure-sensitive adhesive on the outer side of the substrate layer and compounding the electromagnetic shielding layer with a release film, wherein the electromagnetic shielding layer is of a three-layer structure of AZO with the thickness of 45nm, Ag with the thickness of 16-20nm and AZO with the thickness of 45nm prepared by magnetron sputtering, the thickness of the pressure-sensitive adhesive layer is 8 mu m, and the thickness of the release film is 23 mu m.

Example 2

A preparation method of an electromagnetic shielding laser eavesdropping blocking two-in-one film comprises the following steps:

(1) uniformly adding a laser eavesdropping blocking material into a base material layer material to produce and prepare a laser eavesdropping blocking base material layer, wherein the formula of the laser eavesdropping blocking material is cesium tungsten bronze and ATO with a ratio of 1:1, the total adding amount of the cesium tungsten bronze and the ATO is 3 g/square meter, and the thickness is 23 mu m or other thicknesses;

(2) magnetron sputtering an electromagnetic shielding layer on one side of the laser eavesdropping blocking substrate layer, and coating a scratch-resistant layer on the other side, wherein the thickness of the scratch-resistant layer is 3 mu m;

(3) and coating a pressure-sensitive adhesive on the outer side of the electromagnetic shielding layer and compounding the electromagnetic shielding layer with a release film, wherein the electromagnetic shielding layer is in a five-layer structure of AZO with the thickness of 92nm, Ag with the thickness of 16-20nm, AZO with the thickness of 92nm, Ag with the thickness of 16-20nm and AZO with the thickness of 92nm, the thickness of the pressure-sensitive adhesive layer is 8 mu m, and the thickness of the release film is 23 mu m.

Example 3

A preparation method of an electromagnetic shielding laser eavesdropping blocking two-in-one film comprises the following steps:

(1) magnetron sputtering an electromagnetic shielding layer on one side of the base material layer, wherein the electromagnetic shielding layer is of a three-layer structure of AZO with the thickness of 45nm, Ag with the thickness of 16-20nm and AZO with the thickness of 45nm prepared by magnetron sputtering, and a scratch-resistant layer is coated on the other side of the electromagnetic shielding layer, the thickness of the scratch-resistant layer is 3 microns, and the thickness of the base material layer is 23 microns;

(2) the laser eavesdropping blocking material is dispersed in the pressure-sensitive adhesive coating, coated on the electromagnetic shielding layer and finally compounded with the release film, the formula of the laser eavesdropping blocking material is cesium tungsten bronze and ATO in a ratio of 1:1, the total addition amount of the cesium tungsten bronze and the ATO is 3 g/square meter, the thickness of the laser eavesdropping blocking pressure-sensitive adhesive layer is 8 mu m, and the thickness of the release film is 23 mu m.

The laser eavesdropping blocking data of the protective films obtained in examples 1 to 3 were tested, and the detection basis of the laser eavesdropping blocking data was as follows: GB/T2680-2021 determination of visible light transmittance, sunlight direct transmittance, solar total transmittance, ultraviolet transmittance and related window glass parameters of architectural glass (the currently effective standard is GB/T2680-1994, but version 2021, will be effective 10/1/2021)), detection instrument: spectrophotometer (GM-032), wherein the results of example 3 are similar to example 1 and are not described herein, the experimental results of examples 1 and 2 are as follows:

in addition, the electromagnetic shielding effect of the protective film obtained in examples 1 to 3 was tested, and the electromagnetic shielding effect was determined according to: the GJB6190-2008 method for measuring the shielding effectiveness of the electromagnetic shielding material adopts a signal generator, an arbitrary waveform generator, a spectrum analyzer, a horn antenna and a coaxial transmission line measuring device to carry out testing, the result of the embodiment 3 is similar to that of the embodiment 1, and the testing results of the embodiments 1 and 2 are as follows:

as can be seen from the test data, the protective film obtained in this embodiment 2 has excellent electromagnetic shielding and laser eavesdropping blocking effects, and realizes two-in-one of electromagnetic shielding and laser eavesdropping blocking, and the protective film obtained in this embodiment 2 has a small number of layers, is simple in preparation method, and has good application prospects.

In conclusion, the substrate layer or the pressure-sensitive adhesive layer in the existing electromagnetic shielding film is improved and designed to form the laser eavesdropping blocking substrate layer or the laser eavesdropping blocking pressure-sensitive adhesive layer, so that the film material has the electromagnetic shielding and laser eavesdropping blocking functions at the same time, the electromagnetic shielding and laser eavesdropping blocking are combined into a whole, the structure is simple, the number of layers is small, and the processing technology is simple.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.