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Preparation method of infrared laser protective film

A technology of infrared laser and protective film, which is applied in the field of information security, can solve the problems of loss of work meaning, inability to effectively prevent information leakage, and affect eavesdropping on laser signals, etc., and achieve simple and reliable preparation methods, prevent information leakage, and increase stability. Effect

Active Publication Date: 2020-06-12
成都立鑫新技术科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technique is to cut a vibration jammer into the glass, which affects the eavesdropping on the laser signal
However, diffuse reflection laser eavesdropping has nothing to do with the vibration of the glass, so it loses its working significance and still cannot effectively prevent information leakage

Method used

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  • Preparation method of infrared laser protective film
  • Preparation method of infrared laser protective film
  • Preparation method of infrared laser protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment discloses a method for preparing an infrared laser protective film, comprising the following steps:

[0042] (1) Coating an adhesive on the base layer 1 to form the adhesive layer 2 .

[0043](2) First mix antimony oxide, indium oxide and carbon nanotubes with a mass ratio of 1:1:1 evenly, then disperse the mixture into polyethylene terephthalate material to obtain a masterbatch, and then pass it through a belt The extruder of the grating die head extrudes the masterbatch onto the first adhesive layer 2 to form an infrared laser grating treatment layer 3 with grating intervals. Specifically, before the masterbatch enters the extruder, it is first heated and melted, and then extruded from a grating die through a filter, and after solidification, an infrared laser grating treatment layer 3 with grating intervals is obtained.

[0044] (3) A protective layer 3 is set on the infrared laser grating treatment layer 3, and the protective layer 3 is uniformly mi...

Embodiment 2

[0049] This embodiment discloses a method for preparing an infrared laser protective film, comprising the following steps:

[0050] (1) A low-density polyethylene film is used as the base layer 1, and an adhesive is coated on the base layer 1 to form an adhesive layer 2. Wherein, the thickness of the base layer 1 is 10-70 μm, preferably the thickness of the base layer 1 is 40-50 μm. The adhesive used for the adhesive layer 2 is preferably polyvinyl acetate adhesive.

[0051] (2) First mix antimony oxide, indium oxide and carbon nanotubes with a mass ratio of 1:1:1 evenly, then disperse the mixture into polyethylene terephthalate material to obtain a masterbatch, and then pass it through a belt The extruder of the grating die head extrudes the masterbatch onto the first adhesive layer 2 to form an infrared laser grating treatment layer 3 with grating intervals. Specifically, before the masterbatch enters the extruder, it is first heated and melted, and then extruded from a gr...

Embodiment 3

[0071] This embodiment has verified the technical solution described in embodiment 1 and embodiment 2, specifically as follows:

[0072] Use infrared lasers to actually eavesdrop on the indoor area without protective film and pasted the disclosed protective film of embodiment 1 or embodiment 2 respectively. The infrared laser intensity of emission is 10mw, and adopting diameter at 100 meters is that the 100mm lens receives. When the protective film is attached, the intensity of the returned light is 1nw, which can clearly restore the voice information caused by the vibration of the object caused by speaking. After the protective film is attached, the returned light is 10pw at a distance of 1 meter, and the signal is too weak to restore. Voice message. This proves that the information leakage prevention effect of the present invention is very good, and can effectively prevent information leakage.

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Abstract

The invention discloses a preparation method of an infrared laser protective film. The preparation method comprises the following steps: (1) coating an adhesive on a substrate layer to form an adhesive layer; (2) uniformly mixing antimony oxide, indium oxide and carbon nanotubes according to a mass ratio of 1:1:1, dispersing the mixture into a polyethylene glycol terephthalate material to obtain amaster batch, and extruding the master batch onto the first adhesive layer through an extruder with a grating type die head to form an infrared laser grating treatment layer with grating intervals; (3) arranging a protective layer on the infrared laser grating processing layer; and (4) coating the protective layer with an adhesive to form a mounting adhesive layer, and then adhering a release layer to the mounting adhesive layer to obtain the infrared laser protective film. The preparation method is simple, and the prepared product can effectively prevent information leakage.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a preparation method of an infrared laser protective film. Background technique [0002] With the development of laser technology, infrared laser eavesdropping has become one of the important sources of information leakage, and infrared laser eavesdropping information acquisition itself is a relatively new field, so there are relatively few protection methods for it. [0003] At present, in order to effectively prevent information leakage, people have proposed the following two anti-eavesdropping technologies for infrared laser eavesdropping: [0004] 1. Optical interference technology, such as a prior art laser monitoring and detection device whose publication number is CN204287480U, its technical solution is: including an illumination component for illuminating the target area and an imaging component for collecting image information of the target area, The imagin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/50C08L67/02C08K3/22C08K3/04C08J5/18B29C48/15B29C69/00
CPCB29C69/00B29C48/15C08J5/18C08J2367/02C08K3/22C08K3/2279C09J2423/046C09J2431/00C09J2467/006C08K3/041C09J7/29C09J7/50
Inventor 王汝君景小兵罗斌
Owner 成都立鑫新技术科技有限公司
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