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Anti-explosion and anti-laser eavesdropping protective film and preparation method thereof

A protective film and laser technology, applied in the direction of film/sheet adhesives, coatings, adhesives, etc., can solve the problems of high cost and risk of protection failure, improve the ability to resist shattering, wide range of laser protection, The effect of high light transmittance

Pending Publication Date: 2021-11-05
三千新材料苏州有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an anti-explosion and anti-laser eavesdropping protective film and its preparation method to solve the problem of protection failure risk or high cost in the anti-eavesdropping method in the prior art

Method used

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  • Anti-explosion and anti-laser eavesdropping protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In a collector type constant temperature heating magnetic stirrer, add 5g of hydroxylated PDMS with a molecular weight of 1000 to a 500ml round bottom flask, then add 50ml of tetrahydrofuran to dilute it, and add quadruple hydrogen bonds with two isocyanate functional groups in an equimolar ratio Monomer, heated to 80°C and stirred for 12 hours, poured it out, evaporated the solvent to dryness, and then dissolved it in 10ml ethyl acetate solution to obtain an explosion-proof coating;

[0042] Evenly disperse the infrared blocking agent in the mixed solvent of acrylate pressure-sensitive adhesive, ethyl acetate and curing agent to form a coating for laser blocking layer; use PET as the substrate layer to coat the laser blocking layer; Paste the PET layer on the blocking layer, and then coat the explosion-proof layer on the PET layer to form a structure of PET layer / laser blocking layer / PET layer / explosion-proof layer; paste the PET layer on the explosion-proof layer, and ...

Embodiment 2

[0044] Dry polypropylene glycol-polyethylene glycol-polypropylene glycol (PPG-PEG-PPG, number average molecular weight 1000) under vacuum, then mix it with hexamethylene diisocyanate (HDI), and add the catalyst under nitrogen atmosphere and stirring conditions Dibutyltin dilaurate, reaction obtains prepolymer I; Wherein, the mol ratio of PPG-PEG-PPG and hexamethylene diisocyanate is 1:2.05, and the consumption of catalyst accounts for 0.05% of reactant gross mass, and reaction temperature is 70°C, the reaction time is 4 hours;

[0045] Dissolve tetraethylene glycol (TEG), a quadruple hydrogen-bonded monomer chain extender containing two hydroxyl groups, in dimethyl sulfoxide, and then add it to prepolymer I at a reaction temperature of 85°C. The reaction time is 3 hours, and the polyurethane containing multiple hydrogen bonds is obtained, wherein the molar ratio of tetraethylene glycol (TEG) and quadruple hydrogen bond monomer is 8:2;

[0046] Add 5g of polyurethane containin...

Embodiment 3

[0049] Polytetrahydrofuran ether glycol (PTMG, number-average molecular weight 2000) is dried under vacuum, and then mixed evenly with isophorone diisocyanate (IPDI), and the catalyst dibutyltin dilaurate is added under nitrogen atmosphere and stirring conditions, and the reaction is obtained. Polymer I, wherein the molar ratio of polytetrahydrofuran ether diol and isophorone diisocyanate is 1:2, the consumption of catalyst accounts for 0.08% of the total mass of reactants, the reaction temperature is 60°C, and the reaction time is 3 hours;

[0050] Dissolve the quadruple hydrogen-bonded monomer containing two hydroxyl groups in dimethyl sulfoxide, and add it to prepolymer I as the only chain extender. The reaction temperature is 60°C, and the reaction time is 3 hours to obtain the Viscous polyurethane with multiple hydrogen bonds;

[0051] In a collector-type constant temperature heating magnetic stirrer, add 5g of viscous polyurethane containing multiple hydrogen bonds into ...

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Abstract

The invention relates to an anti-explosion and anti-laser eavesdropping protective film and a preparation method thereof. The protective film comprises an anti-scraping layer, an anti-explosion and laser blocking layer, an anti-ultraviolet pressure-sensitive back adhesive layer and a release film, and base material layers are arranged between the anti-explosion and laser blocking layer and the anti-scraping layer and between the anti-explosion and laser blocking layer and the anti-ultraviolet pressure-sensitive back adhesive layer; and the anti-explosion and laser blocking layer is of a three-layer structure of an anti-explosion layer, a base material layer and a laser blocking layer or of a single-layer structure of an anti-explosion laser blocking composite layer. The protective film has the anti-explosion and anti-laser eavesdropping effects at the same time, the supramolecular polymer containing multiple hydrogen bonds is used in the anti-explosion layer, and the energy absorption type anti-explosion function of absorbing destructive energy is achieved; and the infrared laser eavesdropping protection function is achieved by arranging the laser blocking layer added with the infrared blocking agent or adding the infrared blocking agent into the explosion-proof layer material for coating, the laser protection range is wide, and the light transmittance is high.

Description

technical field [0001] The invention relates to the technical field of explosion-proof and anti-eavesdropping, in particular to an explosion-proof and anti-laser eavesdropping protective film and a preparation method thereof. Background technique [0002] At present, the issue of information security has become a major concern of the society. At present, eavesdropping through "laser eavesdropping" has become one of the main ways of stealing secrets. Laser eavesdropping detects the vibration of surrounding objects forced by the speaker's voice by emitting a laser invisible to the human eye, and obtains vibration information. The vibration information is restored to an optical signal and then converted into an electrical signal to achieve the purpose of eavesdropping. For example, the speaker's voice will cause the surrounding paper cups to vibrate. If the laser is shot on the paper cup, information such as the vibration amplitude and frequency of the paper cup will be obtaine...

Claims

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Application Information

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IPC IPC(8): C09J7/29C09D175/04C09D175/08C09D133/04C09D7/61
Inventor 颜徐州吴善武仲从磊
Owner 三千新材料苏州有限公司
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