Aluminum foil paper with laser holographic security and manufacturing process thereof

Abstract

The invention provides aluminum foil paper with laser holographic security and a manufacturing process thereof. The aluminum foil paper with laser holographic security comprises a body paper layer, a plastic-based membrane and an aluminum foil layer, wherein the surface of the body paper layer is plated with a layer of aluminum film by virtue of a vacuum aluminizing method, so that the aluminum foil layer is formed; the surface of the plastic-based membrane is coated with a polyurethane layer, so that an information carrying layer with laser holographic patterns is formed; and the information carrying layer is subjected to die pressing by virtue of a metal matrix, so that a transparent laser holographic film is obtained. The surface of the body paper layer is plated with a layer of aluminum film by virtue of the vacuum aluminizing method, so that the aluminum foil paper is preliminarily formed and has the advantages of less material consumption, convenience in processing and high molding rate; by virtue of the laser holographic film formed by polyurethane, molding of anti-fake marks is realized, and polyurethane has a relatively high optical refractive index; and the polyurethane film serving as the laser holographic film not only reserves the basic characteristics of common aluminum-plated films with laser holographic security, but also is enhanced in anti-fake performance, lowered in cost and greatly expanded in application functions.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil paper, in particular to a laser holographic anti-counterfeiting aluminum foil paper and a manufacturing process thereof. Background technique [0002] At present, a reflective aluminum-coated laser holographic film is widely used in the field of anti-counterfeiting. This reflective aluminized laser holographic film was invented and applied since the early 1980s. However, with the passage of time, this anti-counterfeiting technology has been unable to apply to current products due to the continuous change of materials. In the 1990s, someone studied the optical reflection and absorption characteristics of high refractive index dielectric materials, and developed an all-dielectric film with high reflection and low absorption for holographic images. material situation. However, this medium is an inorganic thin film coating, and the production cost is very high. [0003] Polyurethane is a com...

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the prior art, to provide a laser holographic anti-counterfeiting aluminum foil paper and its manufacturing process, by spraying on the paper layer by vacuum aluminizing, and coating a layer of polyurethane on the surface of the aluminum layer, The anti-counterfeiting layer is compounded with the laser hologram formed by polyurethane, which solves the problems of large consumables, low structural strength and easy damage in the existing anti-counterfeiting process of aluminum foil paper.

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