Light wave and electromagnetic wave two-in-one shielding film

Abstract

The utility model discloses a light wave and electromagnetic wave two-in-one shielding film which comprises a PET carrier film, an ITO grid layer is arranged on the lower end face of the PET carrier film, and a protective film is pasted on the lower end face of the ITO grid layer. An infrared reflecting layer is sputtered on the upper end face of the PET carrier film in a magnetron manner, an infrared absorbing layer is arranged on the upper end face of the infrared reflecting layer, and an optical back adhesive layer is arranged on the upper end face of the infrared absorbing layer. Compared with the prior art, the light wave and electromagnetic wave two-in-one shielding film combines different functions of the light wave shielding film and the electromagnetic shielding film through combination of different layer structures, one product has the two functions, the two functions do not influence each other, the thickness size of the whole light wave and electromagnetic wave two-in-one shielding film is small, and the shielding film is convenient to manufacture. And meanwhile, good and effective effects of preventing laser eavesdropping, electromagnetic radiation and electromagnetic interference can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to functional film technical field, especially a light wave electromagnetic wave two in one shielding film. BACKGROUND

[0002] The prior art has single function, and the functional product only has the thin film with one kind of function of laser eavesdropping blocking function or electromagnetic shielding function, when arranging by the confidential unit, electromagnetic shielding and laser eavesdropping often need protection simultaneously.

[0003] Chinese patent application number CN202311170172.9 discloses a kind of laser eavesdropping blocking and electromagnetic signal shielding protection film. Protective film adopts multiple shielding bodies, wherein each shielding body outside adopts high electrical conductivity material to enhance reflection, and high magnetic permeability material is used on the inner side of shielding body to increase eddy current effect. The above-mentioned shielding film mainly uses multiple layers of metal and carbon fiber material as shielding layer, which enhances the electromagnetic shielding effect, but due to the characteristics of metal and carbon fiber material itself, the light wave reflection effect is poor.

[0004] Therefore, it is urgent to develop a light wave electromagnetic wave two-in-one shielding film. SUMMARY

[0005] The utility model aims at solving the deficiency existing in prior art, and provides a kind of light wave electromagnetic wave two-in-one shielding film.

[0006] To achieve the above-mentioned purpose, the utility model is implemented according to the following technical solutions:

[0007] A kind of light wave electromagnetic wave two-in-one shielding film, including PET carrier film, the lower end surface of the PET carrier film is equipped with ITO grid layer, the lower end surface of the ITO grid layer is equipped with protective film;The upper end surface of the PET carrier film is magnetron sputtering with infrared reflection layer, the upper end surface of the infrared reflection layer is equipped with infrared absorption layer, and the upper end surface of the infrared absorption layer is equipped with optical back adhesive layer.

[0008] Further, the ITO grid layer is a plurality of prismatic ITO grids.

[0009] Further, the infrared reflection layer is a silver plating layer, and the thickness is 140-150 nanometers.

[0010] Further, the infrared absorption layer is cesium tungsten bronze dispersion liquid coating, and the thickness is 8-10 microns.

[0011] Further, the optical back adhesive layer is OCA optical adhesive coating, and the thickness is 40-50 microns.

[0012] Compared with the prior art, the light wave electromagnetic wave two-in-one shielding film has the advantages that the different layer structure combinations combine the different functions of the light wave shielding film and the electromagnetic shielding film, one product includes the above two functions, the two functions do not affect each other, the thickness size of the whole light wave electromagnetic wave two-in-one shielding film is small, and good effective anti-laser eavesdropping, anti-electromagnetic radiation and anti-electromagnetic interference effects can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the ITO grid layer. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following combines the drawings and examples, and the utility model is further explained in detail. The specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0016] As shown in the figure, Figure 1 The utility model provides a kind of light wave electromagnetic wave two-in-one shielding film, including PET carrier film 1, the lower end surface of the PET carrier film 1 is equipped with ITO grid layer 2, the lower end surface of the ITO grid layer 2 is equipped with protective film 3 pasted;The upper end surface of the PET carrier film 1 is magnetron sputtered with infrared reflection layer 4 with reflection effect to infrared, and the infrared reflection layer 4 is metal silver plating layer, and its thickness is 140-150 nanometers;The upper end surface of the infrared reflection layer 4 is magnetron sputtered with infrared absorption layer 5 for increasing infrared shielding performance, and the infrared absorption layer 5 is cesium tungsten bronze dispersion liquid coating, and its thickness is 8-10 microns;The upper end surface of the infrared absorption layer 5 is equipped with optical back adhesive layer 6, and the optical back adhesive layer 6 is OCA optical adhesive coating, and its thickness is 40-50 microns.

[0017] As shown in the figure, Figure 2 ITO grid layer is a plurality of prismatic ITO grids 21, which is etched on ITO film, and the inside of prismatic ITO grid 21 is hollow structure, and the outer periphery of prismatic ITO grid 21 is also hollow structure, so as to improve the electromagnetic shielding effect of ITO grid layer.

[0018] The specific process steps of the light wave electromagnetic wave two-in-one shielding film of the embodiment are as follows:

[0019] 1, vacuum sputtering electromagnetic shielding layer

[0020] In 10-7 Torr high vacuum state, the ITO rotating target of magnetron sputtering equipment is filled with argon gas with a flow rate of 500sccm, high voltage direct current of 20A, 460V is applied to ionize argon into argon ions, accelerate impact ITO target material, and sputter ITO ions; ITO ions are accelerated to sputter on PET carrier film 1, and the plated ITO layer is etched into several prismatic ITO grids to form an ITO grid layer 2 with electromagnetic shielding function; after the film coating is completed, a protective film 3 is attached to the surface of the ITO grid layer 2;

[0021] 2、Vacuum sputtering plating infrared reflection layer

[0022] In 10-7 Torr high vacuum state, the silver target of magnetron sputtering equipment is filled with argon gas with a flow rate of 500sccm, high voltage direct current of 20A, 460V is applied to ionize argon into argon ions, accelerate impact ITO target material, and sputter ITO ions; ITO ions are accelerated to sputter on PET carrier film 1, and the plated ITO layer is etched into several prismatic ITO grids to form an ITO grid layer 2 with electromagnetic shielding function; after the film coating is completed, a protective film 3 is attached to the surface of the ITO grid layer 2;

[0023] 3、Infrared absorption layer

[0024] A cesium tungsten bronze dispersion liquid coating is applied to the surface of the vacuum sputtering film layer to increase the infrared shielding performance.

[0025] 4、Optical adhesive layer

[0026] Applying OCA optical adhesive coating increases the adhesion of the material to glass, walls, etc., and improves the light transmittance of the material.

[0027] Further, the above prepared light wave and electromagnetic wave two-in-one shielding film is detected for infrared transmittance and electromagnetic wave shielding performance by using conventional methods in the art, and the performance parameters are specifically shown in Table 1 and Table 2.

[0028] Table 1

[0029]

[0030] Table 2

[0031]

[0032] As shown in Table 1, the prepared light wave and electromagnetic wave two-in-one shielding film has high transmittance and blocking efficiency for infrared rays, and can effectively block the penetration of infrared rays to achieve good anti-laser eavesdropping.

[0033] As shown in Table 2, the prepared light wave and electromagnetic wave two-in-one shielding film has an infrared transmittance of less than 1 in the range of 950nm-1750mm, and a shielding effectiveness of more than 60dB in the range of 30MHz-18GHz, which can effectively prevent electromagnetic radiation and electromagnetic interference.

[0034] The technical solutions of the utility model are not limited to the above-mentioned specific embodiments, and any technical variations made according to the technical solutions of the utility model fall within the protection scope of the utility model.

Claims

1. A dual-purpose shielding film for both optical and electromagnetic waves, comprising a PET carrier film, characterized in that: The lower end face of the PET carrier film is provided with an ITO mesh layer, and the lower end face of the ITO mesh layer is provided with a protective film; the upper end face of the PET carrier film is magnetron sputtered with an infrared reflective layer, the upper end face of the infrared reflective layer is provided with an infrared absorption layer, and the upper end face of the infrared absorption layer is provided with an optical adhesive layer; this light and electromagnetic wave dual-shielding film is used to shield infrared light in the range of 950nm-1750nm and electromagnetic waves in the range of 30MHz-18GHz.

2. The optical and electromagnetic wave dual-mode shielding film according to claim 1, characterized in that: The ITO mesh layer consists of several prismatic ITO meshes.

3. The optical and electromagnetic wave dual-shielding film according to claim 1, characterized in that: The infrared reflective layer is a metallic silver plating layer with a thickness of 140-150 nanometers.

4. The optical and electromagnetic wave dual-shielding film according to claim 1, characterized in that: The infrared absorption layer is a cesium tungsten bronze dispersion coating with a thickness of 8-10 micrometers.

5. The optical and electromagnetic wave dual-mode shielding film according to claim 1, characterized in that: The optical adhesive backing layer is an OCA optical adhesive coating with a thickness of 40-50 micrometers.

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