Hot stamping foil
By introducing a self-healing coating and a temperature-sensitive color-changing layer into the electroplated aluminum hot stamping foil, the problems of temperature response and external damage of traditional hot stamping foil are solved, realizing self-healing and temperature sensing functions, and improving the durability and decorative effect of the product.
Patent Information
- Application Number
- CN202520588596.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Traditional electroplated aluminum hot stamping foil lacks a temperature response mechanism, which cannot meet the packaging needs of temperature-sensitive products, and it is easily damaged by external factors, resulting in damage to its appearance and shortened service life.
It employs a self-healing coating protective layer and a temperature-sensitive color-changing layer, combined with a microcapsule-type repair agent and an aluminum plating layer, to achieve self-healing and temperature-sensing functions.
It improves the durability and lifespan of hot stamping foil, enhances the decorative effect, can intuitively reflect temperature changes and remind users of usage conditions, and is suitable for diverse and functional packaging materials.
Smart Images
Figure CN223918992U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of stamping foil for packaging and printing, particularly relates to a kind of electrochemical aluminum stamping foil. BACKGROUND
[0002] In the current packaging, decoration and various product identification fields, electrochemical aluminum stamping foil is widely used.
[0003] However, the traditional electrochemical aluminum stamping foil has many limitations. On the one hand, in the face of complex and changeable use environment, it lacks a response mechanism to temperature changes and cannot provide users with intuitive information about the ambient temperature, making it difficult to meet the packaging and application needs of some temperature-sensitive products. For example, food packaging cannot remind consumers of the best eating time or storage conditions according to the temperature state of the food; on the other hand, the stamping foil is easily damaged by scratching, wear and tear and other external damage during daily use. Once damaged, it not only affects the appearance integrity of the product, but also reduces its decoration and identification effect. Moreover, the traditional stamping foil does not have self-repairing ability, resulting in a shortened product life span, especially in application scenarios such as electronic product housings and automotive interior parts, where appearance requirements are high. This problem is more prominent.
[0004] Therefore, we propose an electrochemical aluminum stamping foil. CONTENT OF THE UTILITY MODEL
[0005] The main purpose of the utility model is to provide an electrochemical aluminum stamping foil to prevent the traditional electrochemical aluminum stamping foil from lacking a temperature response mechanism and failing to meet the packaging needs of temperature-sensitive products, as well as to prevent the stamping foil from being easily damaged by external damage and lacking self-repairing ability, which leads to appearance damage and shortened product life span, thereby improving the applicability of electrochemical aluminum stamping foil in different application scenarios, prolonging product life span and enhancing decoration and identification effect, which can effectively solve the problems in the background art.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0007] An electrochemical aluminum stamping foil includes a base film layer, the uppermost part of the base film layer is provided with a self-repairing coating protective layer, the self-repairing mechanism of the self-repairing coating protective layer is microcapsule type, and the self-repairing coating protective layer is filled with a repairing agent, and the lower part of the self-repairing coating protective layer is provided with a temperature-sensitive color-changing layer.
[0008] By adopting the above-mentioned technical scheme, the base film layer provides a stable basis for the entire stamping foil structure, ensuring that the functional layers do not displace or deform due to external forces and other factors during stamping and subsequent use;
[0009] When the ambient temperature changes, the thermochromic material in the temperature-sensitive color-changing layer will respond accordingly. For example, in a low-temperature environment, liquid crystal molecules arrange in order and reflect light of a specific wavelength, thus presenting a color. As the temperature rises, the arrangement of the liquid crystal molecules changes, which changes their light reflection and scattering properties, and the wavelength of the reflected light changes, causing the temperature-sensitive color-changing layer to present different colors. This color change can directly reflect the change in the ambient temperature, adding interest and functionality to the product. In food packaging, the color can change according to the temperature of the food, reminding consumers of the best eating time or storage conditions for the food.
[0010] The self-repairing coating protective layer uses a microcapsule-type self-repairing mechanism to provide the hot stamping foil with self-repairing ability. When the hot stamping foil surface is scratched, worn, or damaged by external factors, the microcapsules in the coating will break. These microcapsules are pre-filled with a repair agent, which flows out after breaking. Under the action of a catalyst or external conditions such as light and temperature, the repair agent reacts with the surrounding material to fill and repair the damaged area. This process can effectively reduce the appearance defects caused by damage during daily use, improve the durability of the hot stamping foil, and extend the service life of the product. This is particularly important in applications such as electronic product casings and automotive interior parts, which require high integrity.
[0011] Further, the lower part of the temperature-sensitive color-changing layer is provided with an aluminum plating layer.
[0012] By using the above technical solution, the aluminum plating layer is located at the lower part of the temperature-sensitive color-changing layer, which mainly reflects light, greatly enhancing the metallic luster of the anodized aluminum hot stamping foil. Under high-temperature and vacuum conditions, aluminum metal is vaporized and uniformly attached to the surface of the lower layer material, forming an aluminum plating layer.
[0013] When light shines on the anodized aluminum hot stamping foil, the aluminum plating layer first reflects the light. This reflection not only gives the hot stamping foil a shiny metallic look, but also affects the color effect of the temperature-sensitive color-changing layer. The thermochromic material in the temperature-sensitive color-changing layer changes its molecular arrangement at different temperatures, affecting its light reflection and scattering properties. The light reflected by the aluminum plating layer passes through the temperature-sensitive color-changing layer, and the two interact, making the final color more rich and unique.
[0014] At low temperature, the temperature-sensitive color-changing layer presents a certain base color, and the light reflected by the aluminum plating layer has a certain metallic luster after penetrating the layer, with the increase of temperature, the color of the temperature-sensitive color-changing layer changes, and the reflected light of the aluminum plating layer and the new color characteristics of the temperature-sensitive color-changing layer interweave with each other, further enriching the visual presentation effect, which not only guarantees the metallic luster beauty of the hot stamping foil in the conventional state, but also adds a unique visual change due to temperature change to the product, meeting the market demand for diversified and functional hot stamping materials.
[0015] Further, the lower part of the aluminum plating layer is provided with a coloring layer.
[0016] By adopting the above technical scheme, the coloring layer is located in the lower part of the aluminum plating layer, which plays a key role in forming a colored anodized aluminum. The layer is covered on the surface of the lower layer material by coating process after mixing the heat-resistant transparent synthetic resin such as maleic anhydride resin with dye in an organic solvent. On the one hand, the coloring layer gives the anodized aluminum hot stamping foil a specific color, and the dye molecules absorb and reflect light of a specific wavelength, thereby presenting various colors to meet the demand of different products for appearance color. On the other hand, it protects the aluminum plating layer. The aluminum plating layer is soft in texture, and the aluminum metal is easily oxidized with oxygen in the air, which affects its metallic luster and performance. The coloring layer acts as a barrier to isolate the air from direct contact with the aluminum plating layer, effectively slowing down the oxidation speed of the aluminum plating layer and prolonging its service life, ensuring that it maintains good metallic luster for a long time.
[0017] When light shines on the anodized aluminum hot stamping foil, the light first penetrates the coloring layer, and the color characteristics of the coloring layer preliminarily screen and modulate the light. Then, the light passing through the coloring layer reaches the aluminum plating layer, and the strong reflection ability of the aluminum plating layer reflects the light back, which is superimposed and fused with the color of the coloring layer. This synergistic effect makes the final presented color not only have rich color, but also have metallic luster brought by the aluminum plating layer, greatly improving the visual effect of the product and meeting the market demand for high-quality and beautiful hot stamping materials.
[0018] Further, the lower part of the coloring layer is provided with a shedding layer.
[0019] By adopting the above technical scheme, the shedding layer is located below the coloring layer, which is mainly composed of organic silicone resin and other materials, and its core characteristic is that it can automatically melt and separate from the base film layer when heated, thereby assisting the precise transfer of subsequent layers;
[0020] When the electrochemical aluminum stamping foil is applied to the stamping process, the stamping equipment applies certain temperature and pressure to it, and in this process, the peeling layer responds to the temperature change first, the intermolecular force of the organic silicone resin is weakened after being heated, and gradually changes from solid to liquid, and then separates from the base film layer.
[0021] Further, the peeling layer is arranged at the upper position of the base film layer.
[0022] By adopting the above technical scheme, when the electrochemical aluminum stamping foil is used for stamping operation, the heat generated by the stamping equipment is transmitted to the foil, the peeling layer above the base film layer is heated, the thermal motion of the silicone resin molecules is intensified, the intermolecular force is weakened, and the originally closely arranged structure gradually collapses, changes from solid to liquid, and the adhesion between the peeling layer and the base film layer decreases sharply, so that the peeling layer can be easily separated from the base film layer.
[0023] Compared with the prior art, the utility model has the following beneficial effects:
[0024] (1) The electrochemical aluminum stamping foil of the utility model is provided with a temperature-sensitive color-changing layer, when the ambient temperature changes, the thermochromic material such as the commonly used liquid crystal type thermochromic material will have a corresponding reaction, in a low temperature environment, the liquid crystal molecules are arranged in order, and a color is presented, with the increase of temperature, the arrangement mode of the liquid crystal molecules changes, the wavelength of the reflected light changes, and the color also changes, this characteristic enables the stamping foil to intuitively reflect the change of the ambient temperature, and adds interest and functionality to the product, for example, food packaging, the color can be changed according to the food temperature, and the best eating time or storage condition of the food is accurately reminded to consumers, so that the use experience and safety of the product are greatly improved.
[0025] (2) The electrochemical aluminum stamping foil of the utility model adopts the self-repairing coating protective layer with a microcapsule type self-repairing mechanism to provide the stamping foil with strong self-repairing ability, when the surface of the stamping foil is damaged by scratching, abrasion and other external factors, the microcapsules in the coating break, the pre-filled repair agent flows out, and under the action of a catalyst or external conditions such as light and temperature, the repair agent reacts with the surrounding material, rapidly fills and repairs the damaged part. This process effectively reduces the appearance defects caused by daily use damage, greatly improves the durability of the stamping foil, especially in the application scenarios such as electronic product shells and automobile interior parts, which have high requirements for appearance integrity, can significantly prolong the service life of the product, reduce maintenance cost, and improve the market competitiveness of the product. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1The utility model relates to a structure schematic diagram of electrochemical aluminum hot stamping foil.
[0027] In the drawing: 1, base film layer; 2, shedding layer; 3, coloring layer; 4, aluminized layer; 5, temperature sensing color-changing layer; 6, self-repairing coating protective layer. DETAILED DESCRIPTION
[0028] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.
[0029] In order to prevent the problem that the traditional electrochemical aluminum hot stamping foil cannot meet the packaging requirements of temperature-sensitive products due to the lack of temperature response mechanism, and prevent the problem that the hot stamping foil is easily damaged by the external environment, has no self-repairing ability, and thus leads to the appearance damage and shortens the service life of the product, thereby improving the applicability of the electrochemical aluminum hot stamping foil in different application scenarios, prolonging the service life of the product and enhancing the decoration and identification effect, as shown in Figure 1 The utility model discloses an electrochemical aluminum hot stamping foil, which comprises a base film layer 1, the uppermost part of the base film layer 1 is provided with a self-repairing coating protective layer 6, the self-repairing mechanism of the self-repairing coating protective layer 6 is microcapsule type, and the self-repairing coating protective layer 6 is filled with a repairing agent, and the lower part of the self-repairing coating protective layer 6 is provided with a temperature sensing color-changing layer 5.
[0030] In use, the base film layer 1 provides stable support for the entire hot stamping foil structure, ensuring that the functional layers do not displace or deform due to external forces and other factors during hot stamping and subsequent use;
[0031] When the ambient temperature changes, the thermochromic material in the temperature sensing color-changing layer 5 will respond accordingly. Taking the common liquid crystal thermochromic material as an example, in a low temperature environment, the liquid crystal molecules are arranged in order, and produce a specific reflection of light of a specific wavelength, thereby presenting a color. As the temperature rises, the arrangement of the liquid crystal molecules changes, which leads to changes in its light reflection and scattering properties, and the wavelength of the reflected light changes, thereby causing the temperature sensing color-changing layer to present different colors. This color change can directly reflect the change of the ambient temperature, adding interest and functionality to the product. In food packaging, the color can change according to the temperature state of the food, reminding consumers of the best eating time or storage conditions of the food;
[0032] The self-repairing coating protective layer 6 adopts a microcapsule type self-repairing mechanism to provide the hot stamping foil with self-repairing capability. When the surface of the hot stamping foil is damaged by scratching, abrasion or other external damage, the microcapsules in the coating will break. The microcapsules are pre-filled with a repairing agent, which flows out after the microcapsules break. Under the action of a catalyst or external conditions such as light and temperature, the repairing agent reacts with the surrounding material to fill and repair the damaged part. This process can effectively reduce the appearance defects caused by damage in daily use, improve the durability of the hot stamping foil, and prolong the service life of the product. In particular, in application scenarios such as electronic product housings and automotive interior parts, which have high requirements for appearance integrity, it is of great significance.
[0033] As shown in Figure 1 The lower part of the temperature sensing color-changing layer 5 is provided with an aluminum plating layer 4.
[0034] In use, the aluminum plating layer 4 is located at the lower part of the temperature sensing color-changing layer 5, and its main function is to reflect light, greatly enhancing the metallic luster of the anodized aluminum hot stamping foil. Under high temperature and vacuum conditions, the aluminum metal is vaporized and uniformly attached to the surface of the underlying material to form the aluminum plating layer 4.
[0035] When light shines on the anodized aluminum hot stamping foil, the aluminum plating layer 4 first reflects the light. This reflection not only gives the hot stamping foil a shiny metallic look, but also affects the color effect presented by the temperature sensing color-changing layer. The thermochromic material in the temperature sensing color-changing layer 5 changes its molecular arrangement at different temperatures, thereby affecting the reflection and scattering properties of light. The light reflected by the aluminum plating layer 4 passes through the temperature sensing color-changing layer 5, and the two interact with each other, making the final color more rich and unique.
[0036] At low temperatures, the temperature sensing color-changing layer 5 presents a certain base color, and the light reflected by the aluminum plating layer 4 passes through this layer, giving the color a certain metallic luster. As the temperature rises, the color of the temperature sensing color-changing layer changes, and the reflected light of the aluminum plating layer 4 and the new color characteristics of the temperature sensing color-changing layer 5 interweave with each other, further enriching the visual presentation effect. This synergistic effect not only ensures the metallic luster beauty of the hot stamping foil in the normal state, but also adds a unique visual change to the product due to temperature changes, meeting the market demand for diversified and functional hot stamping materials.
[0037] As shown in Figure 1 The lower part of the aluminum plating layer 4 is provided with a coloring layer 3.
[0038] In use, the coloring layer 3 is located below the aluminum plating layer 4, plays a key role in forming a colored electrochemical aluminum, and is formed by coating the surface of the lower layer material by a coating process after mixing a heat-resistant transparent synthetic resin such as maleic anhydride resin with a dye in an organic solvent; on the one hand, the coloring layer 3 gives the electrochemical aluminum stamping foil a specific color, and the dye molecules absorb and reflect light of a specific wavelength, thereby presenting various colors to meet the needs of different products for appearance color, and on the other hand, it protects the aluminum plating layer 4, which is relatively soft and the aluminum metal is easily oxidized with oxygen in the air, affecting its metal luster and performance, and the coloring layer 3 acts as a barrier to isolate the air from direct contact with the aluminum plating layer 4, effectively slowing down the oxidation speed of the aluminum plating layer 4 and prolonging its service life, thereby ensuring that the metal luster is maintained for a long time.
[0039] When light shines on the electrochemical aluminum stamping foil, the light first penetrates the coloring layer 3, the color characteristics of the coloring layer 3 preliminarily screen and modulate the light, and then the light that has passed through the coloring layer 3 reaches the aluminum plating layer 4, and the strong reflection ability of the aluminum plating layer 4 reflects the light back, which is superimposed and fused with the color of the coloring layer 3, and the synergistic effect makes the finally presented color not only have rich color, but also have metal luster brought by the aluminum plating layer 4, greatly improving the visual effect of the product and meeting the market demand for high-quality and beautiful stamping materials.
[0040] As shown in the Figure 1 coloring layer 3 is provided with a shedding layer 2.
[0041] In use, the shedding layer 2 is located below the coloring layer 3, and this layer is mainly composed of materials such as silicone resin, and its core characteristic is that it can automatically melt and separate from the base film layer 1 when heated, thereby assisting the precise transfer of the subsequent layers;
[0042] When the electrochemical aluminum stamping foil is applied to the stamping process, the stamping equipment will apply a certain temperature and pressure to it, and in this process, the shedding layer 2 responds to the temperature change first, the intermolecular force of the silicone resin is weakened after being heated, and gradually changes from solid to liquid, and then separates from the base film layer 1, at this time, the coloring layer 3, the aluminum plating layer 4, the temperature-sensitive color-changing layer 5 and the self-repairing coating protective layer 6 originally attached to the shedding layer 2 will be transferred to the surface of the printing material together with the shedding layer 2.
[0043] As shown in the Figure 1 the shedding layer 2 is arranged on the upper part of the base film layer 1.
[0044] In use, when the electrochemical aluminum stamping foil is used for stamping operation, the heat generated by the stamping equipment is transmitted to the foil, the heat motion of the silicone resin molecules in the peeling layer 2 on the base film layer 1 is intensified, the intermolecular force is weakened, and the originally closely arranged structure is gradually broken down, and the peeling layer 2 is converted from solid to liquid, and the adhesion between the peeling layer 2 and the base film layer 1 is sharply reduced, so that the peeling layer 2 can be easily separated from the base film layer 1.
[0045] It should be noted that the utility model is a kind of electrochemical aluminum stamping foil, which is sequentially from bottom to top base film layer 1, peeling layer 2, coloring layer 3, aluminized layer 4, temperature sensing color-changing layer 5 and self-repairing coating protective layer 6, meanwhile, ready to be printed on the printing material and stamping equipment, and ensure that the equipment can stably apply temperature and pressure;
[0046] Turn on the stamping equipment, and heat it to the appropriate stamping temperature, which usually needs to be adjusted according to the specific material of the electrochemical aluminum stamping foil and the characteristics of the printing material, the heat is transmitted to the electrochemical aluminum stamping foil, the peeling layer 2 on the upper part of the base film layer 1 responds first, the heat motion of the silicone resin molecules in the peeling layer 2 is intensified, the intermolecular force is weakened, and the structure is gradually broken down from solid to liquid, which causes the adhesion between the peeling layer 2 and the base film layer 1 to sharply decrease, and then the peeling layer 2 separates from the base film layer 1;
[0047] With the peeling layer 2 separating from the base film layer 1, the coloring layer 3, the aluminized layer 4, the temperature sensing color-changing layer 5 and the self-repairing coating protective layer 6 originally attached thereto will be transferred to the surface of the printing material together with the peeling layer 2, and in this process, the metal luster characteristics of the aluminized layer 4 formed under high temperature and vacuum conditions and the color characteristics of the coloring layer 3 endowed by the dye and heat-resistant transparent synthetic resin jointly affect the visual effect finally presented on the printing material, when light irradiates, it first penetrates the coloring layer 3, and the color characteristics of the coloring layer 3 preliminarily screen and modulate the light, then the light reaches the aluminized layer 4, and the strong reflecting ability of the aluminized layer 4 reflects the light back, which is superimposed and fused with the color of the coloring layer 3, presenting an effect with rich color and metal luster.
[0048] In the use process of the product after stamping, if the ambient temperature changes, the thermochromic material in the temperature sensing color-changing layer 5, such as liquid crystal material, will change the molecular arrangement according to the temperature, and then affect the reflection and scattering characteristics of light, present different colors, and directly reflect the change of environmental temperature, add interestingness and functionality to the product, if the surface of the stamping foil is scratched, worn or damaged by external factors, the microcapsules in the self-repairing coating protective layer 6 break, release the pre-filled repair agent, and under the action of catalyst or external conditions such as light and temperature, the repair agent reacts with the surrounding material, fills and repairs the damaged part, and improves the durability and appearance integrity of the stamping foil.
[0049] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. An electrochemical aluminium stamping foil comprising a base film layer (1), characterised in that, The uppermost part of the base film layer (1) is provided with a self-repairing coating protective layer (6), the self-repairing mechanism of the self-repairing coating protective layer (6) is microcapsule type, and the self-repairing coating protective layer (6) is filled with a repairing agent, and the lower part of the self-repairing coating protective layer (6) is provided with a temperature sensing color-changing layer (5).
2. An electrochemical aluminium stamping foil according to claim 1, characterised in that: The lower part of the temperature sensing color-changing layer (5) is provided with an aluminum plating layer (4).
3. An electrochemical aluminium stamping foil according to claim 2, characterised in that: The lower part of the aluminum plating layer (4) is provided with a coloring layer (3).
4. An electrochemical aluminium stampfoil according to claim 3, characterised in that: The lower part of the coloring layer (3) is provided with a shedding layer (2).
5. An electrochemical aluminium stampfoil according to claim 4, characterised in that: The shedding layer (2) is arranged at the upper part of the base film layer (1).