A laser holographic anti-counterfeiting film

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,...

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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 during the heating molding process, And it may lead to the problem of reducing the degree of information replication; 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 transfer After the completion, the thermoplastic information layer is directly exposed to the outside world, 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 needs of holographic anti-counterfeiting with high precision and high quality

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