Multi-layered magnetic thin film pigment chip and preparation method thereof

Abstract

The invention relates to a multi-layered magnetic thin film and pigment chips thereof, in particular to a multi-layered magnetic thin film pigment chip. The multi-layered magnetic thin film pigment chip comprises a magnetic reflection layer, one side of the magnetic reflection layer sequentially comprises a first adhesion layer, a first medium layer and a first absorption layer; the other side ofthe magnetic reflection layer sequentially comprises a second adhesion layer, a second medium layer and a second absorption layer; the first adhesion layer and the second adhesion layer are located onthe end faces of the two sides of the magnetic reflection layer respectively; the thin film pigment chip is of a symmetrical structure; and the first adhesion layer and the second adhesion layer areboth made of an elemental chromium metal material. The invention further provides a method used for preparing the multi-layered magnetic thin film pigment chip. The multi-layered magnetic thin film pigment chip adopts nickel monomer as the magnetic reflection layer, the reflection rate is higher than nickel-chromium alloys and cobalt-nickel alloys, the film layer stability is improved greatly, andthe optical effect is not affected.

Description

technical field [0001] The invention relates to a magnetic multilayer film and pigment flakes thereof, in particular to a multilayer magnetic thin film pigment flake and a preparation method thereof. Background technique [0002] Optical color-changing film is an advanced new material based on the principle of optical thin-film interference, which shows that the color of the film changes with the angle. It has been adopted by most countries in the world. As a first-line anti-counterfeiting technology directly facing the public, it is widely used to print currency anti-counterfeiting features and protect important information and documents. In recent years, it has gradually penetrated into the civilian anti-counterfeiting market and is used for commodity packaging Anti-counterfeiting. In addition, in the civil decoration market, as special effect pigments, optically variable films and their fragments have also been widely used in the fields of industrial coatings, automotive...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the existing magnetic multi-layer thin film structure is degraded due to the separation of the film layers and does not use mass production, this patent proposes a structure-enhanced magnetic optical color-changing thin film structure, which can maintain the good optical color of the film. Under the premise of discoloration performance, it is proposed to use an extremely thin chromium layer as the adhesive layer between the metal film layer containing nickel, iron, cobalt, etc. and the non-metallic dielectric material layer to effectively solve the adhesion problem between the above film layers

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