Color-changing embossment texture three-dimensional reinforced structure and preparation method thereof

Abstract

The invention provides a color-changing embossment texture three-dimensional reinforcing structure and a preparation method thereof. The color-changing embossment texture three-dimensional reinforcing structure comprises a first texture layer, a base material layer and a second texture layer, the first texture layer and the second texture layer are distributed on the two sides of the base material layer; the first texture layer structure and the second texture layer structure are inclined plane structures arranged according to the Fresnel law, and the first texture layer structure and the second texture layer structure are complementary structures; ink filling layers are arranged in concave parts in the inclined surface structures of the first texture layer and the second texture layer; the particle size of the printing ink is smaller than the width of the sunken part, and the particle size range of the printing ink is 10 nm to 15 microns. Ink filling is carried out in the inclined plane structure, and the effect of different colors in different depths can be formed according to the arrangement of the structure.

Description

Technical Field

[0001] The present application relates to the field of relief printing, and in particular to a color-changing relief texture three-dimensional enhancement structure and a preparation method thereof. Background Art

[0002] The commonly used method for printing in special fields such as magazines, product catalogs, packaging printing, banknotes, stamps and other securities, decorative materials, etc. is to transfer ink to the surface of the substrate through screen printing or gravure printing. In screen printing, the depth of color is achieved by different dot sizes. In gravure printing, the image part of the precision gravure is concave, and the degree of concave varies with the level of the image. The blank part of the precision gravure is raised and on the same plane. The depth of the printed picture is determined by the size and depth of the pit. If the pit is deeper, it contains more ink, and the ink layer left on the substrate after printing is thicker; on the contrary, if the pit is shallow, it contains less ink, and the ink layer left on the substrate after printing is thinner. The precision gravure of gravure printing is composed of pits corresponding to the original image and the surface of the precision gravure.

[0003] Since gravure printing technology is limited by precision, the size of the pit dots is too large and the image is not very detailed. The relief effect of the image is reflected by the color depth of the ink, which is limited and cannot reflect the real three-dimensional effect. Moreover, since there is only one way of expression, which is color depth, the expression effect is single.

[0004] The three-dimensional relief printing process is a printing technology that prints patterns or text on the surface of an object and presents it with a three-dimensional effect through a special processing technology. In order to present the three-dimensional printing effect, the color-changing film technology can be used. The color-changing film is a special material that can change color at different viewing angles or when subjected to external stimuli. Electrochromism refers to the phenomenon that the optical properties of a material (reflectivity, transmittance, absorptivity, etc.) undergo stable and reversible color changes or optical transmittance changes under the action of an external electric field, which is manifested in appearance as a reversible change in color and transparency. Materials with electrochromic properties are called electrochromic materials, and films made of electrochromic materials are called electrochromic films. The color-changing film is a composite material composed of multiple layers of thin films or nanostructures, which achieves the color-changing effect through the principles of light interference, diffraction and refraction.

[0005] The three-dimensional relief prepared by the color-changing film technology can change from one color to another as a whole, achieving a color-changing effect under different viewing angles; however, due to the structure of the relief itself, the same color cannot present different shades according to the pattern. Summary of the invention

[0006] The present application provides a color-changing embossed texture three-dimensional enhancement structure and a preparation method thereof, so as to solve the problem that three-dimensional embossment cannot present light and dark effects according to patterns in the same color.

[0007] On the one hand, the present application provides a color-changing relief texture three-dimensional enhancement structure, including: a first texture layer, a substrate layer and a second texture layer; the first texture layer and the second texture layer are distributed on both sides of the substrate layer; the first texture layer structure and the second texture layer structure are inclined surface structures arranged according to the Fresnel law, and the first texture layer structure and the second texture layer structure are complementary structures; the recessed parts in the inclined surface structures of the first texture layer and the second texture layer are both provided with ink filling layers.

[0008] By filling the inclined surface structure with ink, different shades of color effects can be formed according to the arrangement of the structure, which can enhance the existing relief effect and achieve color-changing effects at different viewing angles, and the colors of different areas vary in depth.

[0009] In a possible implementation manner, the cross-section of the inclined surface structure is one or more of an arc shape, a triangle shape, a trapezoid shape or a step shape.

[0010] In a possible implementation manner, a period of the first texture layer structure and / or the second texture layer structure is 2 μm to 100 μm.

[0011] In a possible implementation manner, the depth of the recessed portion ranges from 3 μm to 10 μm.

[0012] In a possible implementation manner, the particle size of the ink is smaller than the width of the concave portion, and the particle size of the ink is in the range of 10 nm to 15 μm.

[0013] In a possible implementation manner, the ink-filling layers in the first texture layer and the second texture layer are filled with different inks.

[0014] In a possible implementation manner, a contoured coating layer is further provided on a side of the first texture layer and / or the second texture layer away from the substrate layer.

[0015] On the other hand, the present application also provides a method for preparing a color-changing relief texture three-dimensional reinforcement structure, comprising:

[0016] Prepare a master mold; wherein the surface of the master mold has a texture structure, and the texture structure is an inclined surface structure arranged according to Fresnel distribution; duplicate the master mold to obtain a positive mold and a negative mold;

[0017] Apply UV glue on one side of the substrate, transfer the texture structure onto the UV glue layer through a reverse mold and solidify it to obtain a first texture layer;

[0018] Apply UV glue on the other side of the substrate, transfer the texture structure to the UV glue layer through a genuine mold and solidify it to obtain a second texture layer; wherein the structure of the first texture layer is complementary to the structure of the second texture layer;

[0019] The concave parts in the first texture layer and the second texture layer structure are filled with ink respectively to obtain ink-filled layers.

[0020] In a possible implementation manner, before respectively filling the concave portions in the first texture layer and the second texture layer structures with ink, the preparation method further includes:

[0021] The first texture layer and the second texture layer are subjected to surface profile coating treatment.

[0022] In a possible implementation, in the process of filling the recessed parts in the first texture layer and the second texture layer structure with ink respectively, different inks are filled in different areas.

[0023] It can be seen from the above technical scheme that the beneficial effect of the present application is that the present application adopts a first texture layer and a second texture layer with complementary structures to enhance the relief effect and make it more three-dimensional; at the same time, by filling different colors of ink in the structure of the first texture layer and the second texture layer, different shades of color effects can be formed, thereby achieving a color-changing effect at different viewing angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A flow chart of a method for preparing a color-changing embossed texture three-dimensional enhancement structure provided in an embodiment of the present application;

[0026] Figure 2 An example diagram of the UV transfer process provided in the embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the color-changing relief texture three-dimensional enhancement structure prepared in Example 1 of the present application. DETAILED DESCRIPTION

[0028] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0029] In order to solve the problem that the same color of a three-dimensional relief prepared by using the color-changing film technology cannot present an effect of different shades according to the pattern, the embodiment of the present application provides a color-changing relief texture three-dimensional enhancement structure and a preparation method thereof, wherein a first texture layer and a second texture layer are periodically arranged according to the Fresnel law, so that the first texture layer and the second texture layer present a three-dimensional relief effect; an ink filling layer is provided in the recessed parts of the first texture layer and the second texture layer, and different inks are filled in different areas or multiple layers are filled with different inks to present a color-changing effect.

[0030] On the one hand, some embodiments of the present application provide a color-changing relief texture three-dimensional enhancement structure, including: a first texture layer, a substrate layer and a second texture layer; the first texture layer and the second texture layer are distributed on both sides of the substrate layer; the first texture layer structure and the second texture layer structure are inclined surface structures arranged according to the Fresnel law, and the inclined surface is used to reflect light, thereby presenting a three-dimensional relief effect; the first texture layer structure and the second texture layer structure are complementary structures, and the recessed parts in the slope structures of the first texture layer and the second texture layer are both provided with ink filling layers.

[0031] The substrate layer may be a colored or colorless transparent film made of PET (Polyethylene terephthalate) or PMMA (poly(methyl methacrylate)) or PC (polycarbonate) or ABS (Acrylonitrile Butadiene Styrene) or PC+PMMA material.

[0032] In order to make the texture layer have a relief visual effect, the cross section of the inclined surface structure is one or more of an arc shape, a triangle shape, a trapezoid shape or a step shape.

[0033] In order to present a color-changing effect at different viewing angles, the ink-filling layers in the first texture layer and the second texture layer are filled with different inks to present a color effect; the particle size of the ink is smaller than the width of the recessed portion, and the particle size range of the ink is 10nm to 15μm.

[0034] By filling the inclined surface structure with ink, different shades of color effects can be formed according to the arrangement of the structure, which can enhance the existing relief effect and achieve color-changing effects at different viewing angles, and the colors of different areas vary in depth.

[0035] In some embodiments, in order to make the color changing effect more obvious, the period of the first texture layer structure and / or the second texture layer structure is 2 μm to 100 μm, and the depth of the concave portion is in the range of 3 μm to 10 μm.

[0036] In some embodiments, a contoured coating layer is further provided on the side of the first texture layer and / or the second texture layer away from the substrate layer, and a protective layer is covered on the color-changing embossed texture three-dimensional reinforcement structure to protect the precise microstructure from wear during use.

[0037] On the other hand, Figure 1 As shown, the present application also provides a method for preparing a color-changing embossed texture three-dimensional reinforcement structure, comprising:

[0038] S1: preparing a master mold;

[0039] Among them, the surface of the master mold has a texture structure, and the texture structure is a slope structure arranged according to the Fresnel distribution; the master mold is copied to obtain a positive mold and a negative mold; the raised part on the negative mold corresponds to the recessed part on the three-dimensional enhancement structure of the color relief texture, and the recessed part on the reverse mold corresponds to the raised part on the three-dimensional enhancement structure of the color relief texture.

[0040] In some embodiments, the positive mold and the reverse mold can be prepared by electroforming or UV transfer. Relief plating (electroforming) is a multi-color electroplating process that deposits two or more different colors or plating types on the same surface, and makes local protrusions on the basis of multi-color plating to form various pictures and texts with a three-dimensional sense. UV transfer technology uses ultraviolet rays to transfer printed content to the surface of an object, making the printed content clearer, wear-resistant, water-resistant and pollution-resistant. UV transfer technology can be used to print transparent and opaque objects, including metals, plastics, glass, paper and leather.

[0041] S2: UV glue is coated on one side of the substrate, and the texture structure is transferred to the UV glue layer through a reverse mold and cured to obtain a first texture layer;

[0042] S3: coating UV glue on the other side of the substrate, transferring the texture structure to the UV glue layer through a genuine mold and curing it to obtain a second texture layer; wherein the structure of the first texture layer is complementary to the structure of the second texture layer;

[0043] In some embodiments, UV transfer technology is used to form a first texture on a substrate using a reverse mold UV texture structure, so that the first texture is consistent with the master mold; UV transfer technology is used to form a second texture on the other side of the substrate using a genuine mold UV texture structure, so that the structure of the second texture is complementary to the structure of the first texture.

[0044] S4: filling the concave parts in the first texture layer and the second texture layer structure with ink respectively to obtain ink layers.

[0045] In the process of filling the concave parts in the first texture layer and the second texture layer structure with ink respectively, different inks are filled in different areas.

[0046] In some embodiments, before filling the recessed portions in the first texture layer and the second texture layer structures with ink respectively, the preparation method further includes: performing surface contour coating treatment on the first texture layer and the second texture layer to obtain a coating layer, and the recessed portions on the coating layer correspond one-to-one to the recessed portions on the color-changing embossed texture three-dimensional enhancement structure.

[0047] The first texture layer and the second texture layer are arranged periodically according to the Fresnel law, so that the first texture layer and the second texture layer present a three-dimensional relief effect; the concave parts in the first texture layer and the second texture layer structure are provided with ink filling layers, and different inks are filled in different areas or multiple layers are filled with different inks to present a color-changing effect.

[0048] like Figure 2 As shown, it is the UV transfer process of the above embodiment, wherein 1 is the reverse mold, 2 is the image and text on the upper surface of the substrate, 3 is the substrate, 4 is the image and text on the lower surface of the substrate, 5 is the upper surface structure, 6 is the lower surface structure, and 7 is the genuine mold.

[0049] Embodiment 1:

[0050] 1. The master mold is made by photolithography, and the mold surface has a texture structure, which is a slope structure arranged according to Fresnel distribution and has a relief visual effect.

[0051] 2. Through electroforming, the structure of the mold is replicated into a reverse mold and a positive mold.

[0052] 3. UV glue is applied on one side of the substrate by UV transfer replication, and the texture structure is transferred to the UV glue layer through a reverse mold and cured to obtain the first texture layer. The substrate is 100 μm PET.

[0053] 4. Apply UV glue on the other side of the substrate by UV transfer replication, transfer the texture structure onto the UV glue layer through a real mold and cure it to obtain a second texture layer, so that the structure of the second texture layer complements the structure of the first texture layer.

[0054] The first texture layer and the second texture layer after UV transfer are obtained by UV transfer replication;

[0055] 5. Performing surface profiling coating treatment on the structure of the first texture layer and the second texture layer;

[0056] 6. Fill the concave parts of the texture structure of the first texture layer and the second texture layer with ink, and the color in the texture structure of the second texture layer is different from that of the first texture layer.

[0057] like Figure 3 As shown, the color-changing relief texture three-dimensional enhancement structure prepared in this embodiment, from top to bottom are ink 1, coating layer, first texture layer, base film, second texture layer, coating layer, ink 2. The structural period of the first texture layer of this embodiment is 2μm~50μm, the groove cross-section is a slope structure, the depth is 3μm, arranged according to the Fresnel law, presenting a three-dimensional relief effect, as shown in the figure, the leaf relief effect. The second texture layer structure is opposite to the first texture layer structure, and the image position is mirrored so that the image on both sides of the base film is consistent. The thickness between the second texture structure and the first texture is the thickness of the base film, forming a transparent flat plate, which produces a deep visual effect on the relief effect, thereby enhancing the three-dimensional sense of the relief. The concave part of the first texture layer structure is filled with blue nano ink, and the concave part of the second texture layer structure is filled with green nano ink, and the ink filling depth is 2μm.

[0058] It can be seen from the above embodiments that the present application provides a color-changing relief texture three-dimensional enhancement structure and a preparation method thereof, wherein the color-changing relief texture three-dimensional enhancement structure comprises: a first texture layer, a substrate layer and a second texture layer; the first texture layer and the second texture layer are distributed on both sides of the substrate layer; the first texture layer and the second texture layer structure are inclined surface structures arranged according to the Fresnel law, and the first texture layer structure and the second texture layer structure are complementary structures; the concave parts in the inclined surface structures of the first texture layer and the second texture layer are both provided with ink filling layers; the particle size of the ink is smaller than the width of the concave part, and the particle size range of the ink is 10nm to 15μm. By filling the ink in the inclined surface structure, different color effects of different depths can be formed according to the arrangement of the structure.

[0059] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application.

Claims

1. A color-changing embossed texture three-dimensional reinforcement structure, characterized in that: include: A first texture layer, a substrate layer and a second texture layer; the first texture layer and the second texture layer are distributed on both sides of the substrate layer; The first texture layer structure and the second texture layer structure are inclined surface structures arranged according to the Fresnel law, and the first texture layer structure and the second texture layer structure are complementary structures; the concave parts in the inclined surface structures of the first texture layer and the second texture layer are both provided with ink filling layers.

2. The color-changing embossed texture three-dimensional reinforcement structure according to claim 1, characterized in that: The cross section of the inclined surface structure is one or more of an arc shape, a triangle shape, a trapezoid shape or a step shape.

3. The color-changing embossed texture three-dimensional reinforcement structure according to claim 1, characterized in that: The period of the first texture layer structure and / or the second texture layer structure is 2 μm to 100 μm.

4. The color-changing embossed texture three-dimensional reinforcement structure according to claim 1, characterized in that: The depth of the concave portion ranges from 3 μm to 10 μm.

5. The color-changing embossed texture three-dimensional reinforcement structure according to claim 4, characterized in that: The particle size of the ink is smaller than the width of the concave portion, and the particle size of the ink is in the range of 10 nm to 15 μm.

6. The color-changing embossed texture three-dimensional reinforcement structure according to claim 1, characterized in that: The ink-filling layers in the first texture layer and the second texture layer are filled with different inks.

7. The color-changing embossed texture three-dimensional reinforcement structure according to claim 1, characterized in that: A contoured coating layer is also provided on a side of the first texture layer and / or the second texture layer away from the substrate layer.

8. A method for preparing a color-changing relief texture three-dimensional reinforcement structure, characterized in that: Applied to the color-changing embossed texture three-dimensional reinforcement structure according to any one of claims 1 to 7, the method comprising: Prepare a master mold; wherein the surface of the master mold has a texture structure, and the texture structure is an inclined surface structure arranged according to Fresnel distribution; duplicate the master mold to obtain a positive mold and a negative mold; Apply UV glue on one side of the substrate, transfer the texture structure onto the UV glue layer through a reverse mold and solidify it to obtain a first texture layer; Apply UV glue on the other side of the substrate, transfer the texture structure to the UV glue layer through a genuine mold and solidify it to obtain a second texture layer; wherein the structure of the first texture layer is complementary to the structure of the second texture layer; The concave parts in the first texture layer and the second texture layer structure are filled with ink respectively to obtain ink-filled layers.

9. The method for preparing a color-changing embossed texture three-dimensional reinforcement structure according to claim 8, characterized in that: Before respectively filling the concave parts in the first texture layer and the second texture layer structure with ink, the preparation method further comprises: The first texture layer and the second texture layer are subjected to surface profile coating treatment.

10. The method for preparing a color-changing embossed texture three-dimensional reinforcement structure according to claim 8, characterized in that: In the process of filling the concave parts in the first texture layer and the second texture layer structures with ink respectively, different inks are filled in different areas.

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