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Laser holography anti-fake film

A technology of laser holography and anti-counterfeiting film, which is applied in the direction of information-carrying cards and printing, which can solve the problems of poor wear resistance, heat distortion, and difficulty in anti-counterfeiting film, so as to improve process efficiency and operation difficulty, and the overall structure is compact and easy to process. The effect of production

Active Publication Date: 2017-05-31
WUHAN HUAGONG IMAGE TECH & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, further studies have shown that for the above-mentioned laser holographic anti-counterfeiting film image layer formed by thermoplastic polymers, there are still the following defects or deficiencies: First, the characteristics of thermoplastic polymers will cause elastic recovery in the overshoot of the heating mold , and may lead to the problem of reduced information reproduction; secondly, during the heat transfer process, the information layer may also undergo uncontrollable deformation and cause fogging, which is especially obvious under high temperature conditions; finally, when the heat After the transfer is completed, the thermoplastic information layer is directly exposed to the outside world, which not only has poor wear resistance, but also is prone to pattern wear and heat distortion after long-term storage, making it difficult for the anti-counterfeiting film to meet the specific requirements of holographic anti-counterfeiting with high precision and high quality. need

Method used

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  • Laser holography anti-fake film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Coat release layer slurry (prepared by oxidized polyethylene wax and toluene at a weight ratio of 1:99.5) on a PET base film with a thickness of 19 microns by an anilox roller coater, and then at 80-150°C, 100m / min speed coating.

[0031] Next, coat the information layer on the above-mentioned release layer, specifically, coat at 80-150° C. at 80 m / min to obtain an information layer with a thickness of 5 microns. Wherein, the above-mentioned information layer is an epoxy resin layer in which the curing agent is coated in the microcapsule body: the epoxy resin can be epoxy resin E-20, which contains 1.7wt% toluene-2,4-diisocyanate, 2.4wt% %2-methylimidazole, 5.4%wt E-44 epoxy resin, 90.5wt% epoxy resin; the overall size of the microcapsule body is 0.8 micron, and its capsule wall is made up of isocyanate, and its thickness is 0.4 micron, its The internally dispersed capsule core is selected to be composed of adipic acid hydrazide as the heating curing agent, and the we...

Embodiment 2

[0035] Coat the release layer slurry (1wt% emulsified wax) on the PET base film with a thickness of 12 microns by an anilox roller coater, and then coat at 80-150°C at a speed of 100m / min to obtain a thickness of 0.08 microns release layer.

[0036] Next, coat the information layer on the above-mentioned release layer, specifically, coat at 80-150° C. at 80 m / min to obtain an information layer with a thickness of 2 micrometers. Wherein, the above-mentioned information layer is an epoxy resin layer in which the curing agent is coated in the microcapsule body: the epoxy resin can be epoxy resin E-20, which contains 1.7wt% toluene-2,4-diisocyanate, 2.4wt% %2-methylimidazole, 5.4%wt E-44 epoxy resin, 90.5wt% epoxy resin; the overall size of the microcapsule body is 1 micron, and its capsule wall is made up of isocyanate, and its thickness is 0.2 micron, and its The internally dispersed capsule core is selected to use salicylic acid hydrazide as the heating and curing agent, and the...

Embodiment 3

[0040] Coat the release layer slurry (prepared by oxidized polyethylene wax and toluene at a weight ratio of 1:99.5) on a PET base film with a thickness of 50 microns by an anilox roller coater, and then at 80-150°C, 100m / min speed coating.

[0041] Next, coat the information layer on the above-mentioned release layer, specifically, coat at 80-150° C. at 80 m / min to obtain an information layer with a thickness of 6.5 microns. Wherein, the above-mentioned information layer is an epoxy resin layer in which the curing agent is coated in the microcapsule body: the epoxy resin can be epoxy resin E-20, which contains 1.7wt% toluene-2,4-diisocyanate, 2.4wt% %2-methylimidazole, 5.4%wt E-44 epoxy resin, 90.5wt% epoxy resin; the overall size of the microcapsule body is 0.8 micron, and its capsule wall is made up of isocyanate, and its thickness is 0.6 micron, its The inner dispersing capsule core is selected to be composed of p-hydroxybenzoic acid hydrazide as the heating curing agent...

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Abstract

The invention belongs to the field related to preparation of holography anti-fake materials, and discloses a laser holography anti-fake film. The laser holography anti-fake film comprises a base film, a release layer, an information layer, a reflection layer and a hot melt adhesive layer laminated in sequence, wherein the information layer consists of such as substrates as epoxy resins and a lot of micro capsules dispersed in the substrates; capsule cores of the micro capsules consist of heating curing agents for generating a cross linking reaction with the epoxy resins in the mold pressing process to cure holography relief patterns; and capsule walls are used for stopping contact between the capsule cores and the substrates before mold pressing. The laser holography anti-fake film can effectively solve multiple defects in a thermoplastic holography anti-fake film; and a laser holography film product with nearly 100% of high-precision copy information, not influenced by the heat transfer working conditions, convenient to preserve for a long time and maintaining high-quality anti-fake function can be obtained.

Description

technical field [0001] The invention belongs to the field related to the preparation of holographic anti-counterfeiting materials, and more specifically relates to a laser holographic anti-counterfeiting film. Background technique [0002] With the emergence of laser holographic molding technology, low-cost, mass-produced holograms can be realized. The laser holographic anti-counterfeiting film in the prior art is generally composed of a base film, a release layer, an information layer, a reflective layer and a hot melt adhesive layer laminated in sequence. Among them, the information layer is usually coated with a thermoplastic polymer, so that under certain temperature and pressure conditions, the coating embosses the relief pattern on the metal mold on the coating or aluminum layer through thermal deformation; during heat transfer, the film The tape separates the base film and the information layer from the release layer and transfers to the sample surface. For example,...

Claims

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Application Information

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IPC IPC(8): B42D25/36B42D25/46
CPCB42D25/36B42D25/46
Inventor 杨志方黄婷寇倩倩
Owner WUHAN HUAGONG IMAGE TECH & DEV