Partial colorful heat transfer printing film

Abstract

The utility model discloses a local colorful heat transfer printing film which sequentially comprises a base film layer, a release layer, a color layer, a microstructure, a metal layer and a back adhesive layer from top to bottom, and the microstructure is arranged in a sectional mode. According to the heat transfer printing film, the microstructure is arranged in a segmented mode, and therefore the anti-fake effect of the heat transfer printing film can be effectively improved.

Description

Technical Field

[0001] This utility model relates to heat transfer film, and more particularly to a localized iridescent heat transfer film. Background Technology

[0002] The heat transfer decoration process involves heating a heat transfer film once to transfer the characters or patterns on the film onto the surface of the substrate, forming a high-quality decorative film.

[0003] During the heat transfer process, the protective layer and pattern layer are separated from the polyester base film by the combined action of heat and pressure. Hot melt adhesive permanently bonds the entire decorative layer to the substrate, forming a decorative surface pattern and giving the substrate surface excellent properties such as wear resistance and light resistance. The patterns are novel and beautiful, and the colors are stable, making it a widely used decorative and anti-counterfeiting material.

[0004] However, with social development, higher requirements have been placed on anti-counterfeiting and durability in some special fields, such as motor vehicle license plates. Traditional solid color heat transfer films can no longer meet the requirements for high anti-counterfeiting and vibrant colors, so improvements are needed. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies, such as low anti-counterfeiting technology and monotonous product color schemes, by providing a new type of localized iridescent heat transfer film.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] A localized iridescent heat transfer film, wherein the heat transfer film comprises, from top to bottom, a base film layer, a release layer, a color layer, a microstructure, a metal layer, and an adhesive layer, wherein the microstructure is arranged in segments.

[0008] This application effectively enhances the anti-counterfeiting effect of thermal transfer films by setting the microstructure in segments.

[0009] Preferably, in the aforementioned partial iridescent heat transfer film, an air gap is formed between adjacent microstructures, and the adhesive layer extends into the air gap.

[0010] Preferably, in the aforementioned partial iridescent heat transfer film, the distance of the void space is 0.05 micrometers to 50 millimeters.

[0011] If the clearance space is less than 0.05 micrometers, the microstructure is too short to be distinguished by the naked eye, making it difficult to see the segmented structure and thus failing to demonstrate the local iridescent grating effect and smooth local effect presented by the segmented structure. If the clearance space is greater than 50 millimeters, the spacing of the clearance space is too large, which will reduce the overall local iridescent effect area and affect the final iridescent anti-counterfeiting effect. Therefore, setting it within this range can effectively improve the iridescent anti-counterfeiting effect.

[0012] Preferably, in the aforementioned localized iridescent thermal transfer film, the height of the microstructure is 0.1 micrometers to 10 micrometers.

[0013] Setting the microstructure height within this range helps maintain a balance between vibrant color and durability. However, if the microstructure height is too low, it will increase the processing difficulty. Furthermore, because the microstructure height is too low, the corners of the microstructure formed by thermoforming will be more "flat," resulting in a weaker vibrant color. At the same time, the overall impact resistance of the heat transfer film will be reduced due to the low microstructure height, affecting the product's durability. Therefore, a microstructure height within this range is convenient for production and processing, and can also improve the product's impact resistance and durability.

[0014] Preferably, in the aforementioned localized iridescent heat transfer film, the height of the color layer is 1 micrometer to 15 micrometers.

[0015] Within this range, the color layer can maintain the light transmittance of the color within a reasonable range. If the color layer height is too low, the scratch resistance and solvent resistance of the heat transfer film will be reduced, affecting the durability of the product. If the color layer height is too high, the color of the heat transfer film will be darker, resulting in less light passing through the color layer, thereby weakening the iridescent effect of the microstructure. Therefore, setting it within this range can improve the durability of the product and enhance the iridescent effect of the microstructure.

[0016] Preferably, in the above-described partial iridescent heat transfer film, the color layer is segmented.

[0017] The segmented design of the color layers can increase the overall color contrast and anti-counterfeiting effect of the product, presenting an anti-counterfeiting style with partial color and dazzling colors, and partial transparency.

[0018] Preferably, in the aforementioned partial iridescent heat transfer film, the light transmittance of the color layer is 10% to 95%.

[0019] The light transmittance of the color layer is no less than 10% to ensure that the light is not completely blocked by the color layer, thus ensuring the dazzling effect of the bottom structural layer.

[0020] Preferably, in the aforementioned localized iridescent thermal transfer film, the metal layer on the surface of the microstructure is arranged in a segmented manner consistent with the microstructure.

[0021] Preferably, in the above-described partial iridescent heat transfer film, the thickness of the adhesive layer is 1 micrometer to 10 micrometers.

[0022] If the thickness of the adhesive layer is too thin, it will affect the transfer effect of the heat transfer film and its adhesion to the substrate. If it is too thick, the overall thickness will be too large, affecting the edge cutting effect after the heat transfer film is transferred, resulting in burrs on the transfer edge. Therefore, setting the thickness within this range can improve the transfer effect of the heat transfer film and its adhesion to the substrate, and can also prevent burrs from appearing after the heat transfer film is cut.

[0023] The present invention has the following advantages through the above structural improvements:

[0024] Compared with conventional thermal transfer films, this application has the advantage of better anti-counterfeiting effect. By setting both the microstructure and the metal layer as segments, when light is irradiated, the light passes through the base film layer, release layer and color layer in sequence. Since the microstructure and the metal layer are segmented, only the light that irradiates the microstructure and the metal layer can be reflected, and the rest of the light will pass through the void space and the adhesive layer, thereby effectively improving the anti-counterfeiting effect of the thermal transfer film. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the longitudinal section structure of the thermal transfer film of this utility model;

[0026] Figure 2 This is a longitudinal cross-sectional view of the thermal transfer film color layer of this utility model when it is set in a separate manner.

[0027] Reference numerals: 11. Base film layer; 12. Release layer; 13. Color layer; 14. Microstructure; 15. Metal layer; 16. Adhesive layer; 2. Void space. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-2 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention: Example

[0029] like Figure 1 , Figure 2 As shown, a partial iridescent heat transfer film 1 includes, from top to bottom, a base film layer 11, a release layer 12, a color layer 13, a microstructure 14, a metal layer 15, and an adhesive layer 16, wherein the microstructure 14 is arranged in segments.

[0030] Specifically, the 14 layers of the microstructure are made of acrylic resin or UV resin.

[0031] Preferably, an air gap 2 is formed between adjacent microstructures 14, and the adhesive layer 16 extends into the air gap 2.

[0032] Specifically, the sheltered space 2 is designed to allow light to pass through.

[0033] Preferably, the distance of the open space 2 is 0.05 micrometers to 50 millimeters.

[0034] Furthermore, during use, the shelter space 2 can be set up with equal or unequal spacing.

[0035] Preferably, the height of the 14 layers of the microstructure is 0.1 micrometers to 10 micrometers.

[0036] Specifically, during use, the 14 layers of this microstructure can have equal or unequal heights.

[0037] Preferably, the height of the color layer 13 is 1 micrometer to 15 micrometers.

[0038] Preferably, the color layer 13 is segmented.

[0039] Preferably, the light transmittance of the color layer 13 is 10% to 95%.

[0040] Preferably, the metal layer 15 on the surface of the microstructure 14 has a segmented arrangement consistent with the microstructure 14.

[0041] Specifically, in this embodiment, since the metal layer 15 is disposed on the microstructure 14, only the light that shines on the microstructure 14 and the metal layer 15 can be reflected, while the rest of the light will pass through the clearance space 2 and the adhesive layer 16.

[0042] Furthermore, the metal layer 15 is made of aluminum or chromium.

[0043] Preferably, the thickness of the adhesive backing layer 16 is 1 micrometer to 10 micrometers.

[0044] Furthermore, the adhesive backing layer 16 is made of chlorinated polypropylene or polyester resin.

[0045] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A localized iridescent heat transfer film, characterized in that: The heat transfer film (1) includes, from top to bottom, a base film layer (11), a release layer (12), a color layer (13), a microstructure (14), a metal layer (15), and an adhesive layer (16), wherein the microstructure (14) is arranged in segments.

2. The partial iridescent heat transfer film according to claim 1, characterized in that: An air gap (2) is formed between adjacent microstructures (14), and the adhesive layer (16) extends into the air gap (2).

3. The partial iridescent heat transfer film according to claim 2, characterized in that: The distance of the shelter space (2) is 0.05 micrometers to 50 millimeters.

4. The partial iridescent heat transfer film according to claim 1, characterized in that: The height of the microstructure (14) layer is 0.1 micrometers to 10 micrometers.

5. The partial iridescent heat transfer film according to claim 1, characterized in that: The height of the color layer (13) is 1 micrometer to 15 micrometers.

6. The partial iridescent heat transfer film according to claim 1, characterized in that: The color layer (13) is segmented.

7. The partial iridescent heat transfer film according to claim 1, characterized in that: The light transmittance of the color layer (13) is 10% to 95%.

8. The partial iridescent heat transfer film according to claim 1, characterized in that: The metal layer (15) on the surface of the microstructure (14) is arranged in a segmented manner consistent with the microstructure (14).

9. The partial iridescent heat transfer film according to claim 1, characterized in that: The thickness of the adhesive backing layer (16) is 1 micrometer to 10 micrometers.

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