A colour-changeable anodized aluminium stamping foil

Abstract

The utility model relates to the technical field of color-changing electrochemical aluminum stamping foil, and disclose a color-changing electrochemical aluminum stamping foil, including base layer, still including the release layer, color-changing layer, vacuum aluminizing layer and bonding layer that are sequentially laminated and set below the base layer, the release layer is composed of silicone resin and wax, the color-changing layer contains temperature change material and light change material, the vacuum aluminizing layer is nanometer aluminum film, and the bonding layer contains synthetic resin and natural rubbery adhesive. The utility model adopts high temperature resistant inorganic shell layer to package temperature change material, and light change material is wrapped with light transmission polymer shell layer simultaneously, through accurate control microcapsule particle size and dispersion process, the dual response system of physical isolation but function coexistence is constructed in single color-changing layer, and the synchronous independent color-changing response under temperature and ultraviolet stimulation is realized.

Description

Technical Field

[0001] This utility model relates to the field of color-changing electroplated aluminum hot stamping foil technology, specifically a color-changing electroplated aluminum hot stamping foil. Background Technology

[0002] Color-changing electroplated aluminum foil is a special hot stamping material that produces color changes through temperature or light stimulation. Its core feature is that it can dynamically change the color effect under specific conditions (such as temperature changes and ultraviolet radiation).

[0003] Existing color-changing electroplated aluminum foil technology cannot achieve temperature-changing and light-changing functions in a single system, resulting in existing products only being able to select a single response mode. This severely limits its application value in the high-end anti-counterfeiting field. For example, it cannot simultaneously meet the dual verification requirements of temperature-changing (35℃) when touched by finger and light-changing (365nm) when exposed to ultraviolet light. Utility Model Content

[0004] The purpose of this invention is to provide a color-changing electroplated aluminum hot stamping foil that solves the problem that existing color-changing electroplated aluminum hot stamping foil technologies cannot integrate temperature-changing and light-changing functions into a single system.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a color-changing electroplated aluminum hot stamping foil, including a base layer, and further including a release layer, a color-changing layer, a vacuum aluminum plating layer and an adhesive layer stacked sequentially below the base layer. The release layer is composed of silicone resin and wax, the color-changing layer contains thermochromic materials and photochromic materials, and the adhesive layer contains synthetic resin and natural adhesives.

[0007] Furthermore, the thermochromic material is a combination of aziridine dyes and fluorane derivatives.

[0008] Furthermore, the photochromic material is a crown ether-substituted copper phthalocyanine derivative.

[0009] Furthermore, the base layer is a polyester film.

[0010] Furthermore, the synthetic resin is a polystyrene derivative, and the natural adhesive is a plant-based adhesive.

[0011] Furthermore, the vacuum-plated aluminum layer is a nano-scale aluminum thin film.

[0012] This utility model has the following beneficial effects:

[0013] (1) This utility model uses a high-temperature resistant inorganic shell to encapsulate the thermochromic material, and at the same time uses a light-transmitting polymer shell to wrap the photochromic material. By precisely controlling the microcapsule particle size and dispersion process, a dual-response system that is physically isolated but functionally coexisting is constructed in a single color-changing layer, so as to achieve synchronous independent color-changing response under temperature and ultraviolet stimulation.

[0014] (2) The unique semi-transparent metallic properties of the vacuum aluminum plating layer of this utility model not only enhance the color rendering effect of the thermochromic material, but also ensure the full absorption of ultraviolet light by the photochromic material, perfectly coordinating the optical requirements of the dual color-changing mechanism. Secondly, as a functional barrier, it effectively isolates the external environment from the erosion of the sensitive color-changing material, greatly improving the durability and stability of the product. Finally, the nanoscale aluminum film structure itself forms a unique microscopic optical characteristic, which, together with the color-changing layer, constructs a multi-level anti-counterfeiting verification system, significantly enhancing the anti-counterfeiting reliability of the product.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of color-changing electroplated aluminum foil;

[0018] Figure 2 Exploded view of color-changing electroplated aluminum foil;

[0019] Figure 3 This is a cross-sectional view of the thermochromic material structure;

[0020] Figure 4 This is a cross-sectional view of the optically variable material structure;

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the diagram: 1. Base layer; 2. Release layer; 3. Color-changing layer; 301. Thermochromic material; 302. Optical material; 4. Vacuum-plated aluminum layer; 5. Adhesive layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 As shown, this utility model is a color-changing electroplated aluminum hot stamping foil, including a base layer 1, and also including a release layer 2, a color-changing layer 3, a vacuum aluminum plating layer 4 and an adhesive layer 5 stacked sequentially below the base layer 1. The release layer 2 is composed of silicone resin and wax, the color-changing layer 3 includes a thermochromic material 301 and a photochromic material 302, and the adhesive layer 5 includes a synthetic resin and a natural adhesive.

[0025] Thermochromic material 301 is a combination of aziridine dyes and fluorane derivatives;

[0026] Optical variable material 302 is a crown ether-substituted copper phthalocyanine derivative;

[0027] Among them, thermochromic material 301 (azirphthalide + fluorane derivative) is encapsulated in a high-temperature resistant inorganic shell (such as silicon dioxide), and photochromic material 302 (crown ether substituted copper phthalocyanine) is wrapped in a light-transmitting polymer shell (such as polyurethane-acrylate) to form two microcapsule particles. The particle size of the two microcapsules is controlled at 200-500nm to avoid light scattering interference.

[0028] Two types of encapsulated microcapsules were dispersed in resin, an interfacial compatibilizer (such as a silane coupling agent) was added, and ultrasonic treatment was performed to ensure uniform dispersion (particle size ≤ 300 nm). The resin used was a transparent hydroxyl acrylic resin as a carrier. Finally, an 8-12 μm color-changing layer 3 was formed in one step by gravure coating.

[0029] The thermochromic material 301 is encapsulated in a high-temperature resistant inorganic shell, while the photochromic material 302 is wrapped in a light-transmitting polymer shell. By precisely controlling the microcapsule particle size and dispersion process, a dual-response system that is physically isolated but functionally coexisting is constructed in a single color-changing layer 3, so as to achieve synchronous and independent color-changing response under temperature and ultraviolet stimulation.

[0030] Base layer 1 is a polyester film;

[0031] The synthetic resin is a polystyrene derivative, and the natural adhesive is a plant-based adhesive;

[0032] Vacuum-deposited aluminum layer 4 is a nano-scale aluminum thin film;

[0033] Among them, the vacuum-plated aluminum layer 4, with its unique semi-transparent metallic properties, not only enhances the color rendering effect of the thermochromic material 301, but also ensures the full absorption of ultraviolet light by the optical material 302, perfectly coordinating the optical requirements of the dual color-changing mechanism. Secondly, as a functional barrier, it effectively isolates the external environment from the erosion of the sensitive color-changing material, greatly improving the durability and stability of the product. Finally, the nanoscale aluminum film structure itself forms unique microscopic optical characteristics, which, together with the color-changing layer 3, construct a multi-layer anti-counterfeiting verification system, significantly enhancing the anti-counterfeiting reliability of the product.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A color-changing electroplated aluminum hot stamping foil, comprising a base layer (1), characterized in that: It also includes a release layer (2), a color-changing layer (3), a vacuum-plated aluminum layer (4), and an adhesive layer (5) that are sequentially stacked below the base layer (1); The release layer (2) is composed of silicone resin and wax, the color-changing layer (3) contains thermochromic material (301) and photochromic material (302), and the adhesive layer (5) contains synthetic resin and natural adhesive.

2. The color-changing electroplated aluminum hot stamping foil according to claim 1, characterized in that: The thermochromic material (301) is a combination of aziridine dyes and fluorane derivatives.

3. The color-changing electroplated aluminum hot stamping foil according to claim 1, characterized in that: The optically variable material (302) is a crown ether-substituted copper phthalocyanine derivative.

4. The color-changing electroplated aluminum hot stamping foil according to claim 1, characterized in that: The base layer (1) is a polyester film.

5. The color-changing electroplated aluminum hot stamping foil according to claim 1, characterized in that: The synthetic resin is a polystyrene derivative, and the natural adhesive is a plant-based adhesive.

6. The color-changing electroplated aluminum hot stamping foil according to claim 1, characterized in that: The vacuum-plated aluminum layer (4) is a nano-scale aluminum thin film.

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