Prism microstructure and transfer printing roller

Abstract

The prism microstructure comprises a first metal layer and a second metal layer, the first metal layer is arranged on a roller body of the transfer printing roller, the first metal layer comprises a plurality of prism structures, the prism structures are used for machining prism structures of the same structure, and the second metal layer is arranged on the roller body of the transfer printing roller. The depth D of the prism structures is larger than the depth d of the edge structures, and the interval W of the prism structures is larger than the interval w of the edge structures. The second metal layer is arranged on the surface of the first metal layer, and the material wear resistance of the second metal layer is greater than that of the first metal layer. The transfer printing roller provided by the utility model comprises the prism microstructure. The transfer printing roller solves the problems that an existing transfer printing roller is fast in abrasion and prone to glue residue, the service life of the transfer printing roller is prolonged, the product quality of a brightness enhancement film is improved, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transfer rollers, and in particular mainly to a prism microstructure and a transfer roller. Background Art

[0002] Brightness enhancement film, also known as prism film, is a film made of resin organic materials with specific optical effects. It is often used to change the direction of light propagation, produce visual effects or provide privacy protection. The surface of the brightness enhancement film has a tiny prism structure that can change the direction of light when it passes through, producing refraction, reflection or diffraction effects.

[0003] The prism structure on the surface of the brightness enhancement film is usually made by roll-to-roll embossing technology. The specific manufacturing process is generally as follows: first, a UV curable resin glue is applied to the base film by a glue dispenser, and then the base film coated with the resin glue is passed through a transfer roller. The surface of the transfer roller has a pre-engraved pattern structure for forming a prism. When the base film passes through the transfer roller, the pattern structure will be pressed on the resin glue on the surface of the base film. At this time, UV, or ultraviolet light, is used to irradiate the transfer roller to cure the resin and form a cured prism structure. Finally, the film is peeled off from the transfer roller as a whole and rolled up to obtain a brightness enhancement film with the desired prism structure.

[0004] Due to the poor wear resistance of the transfer roller surface, the pattern structure on the surface of the transfer roller will be worn after a period of use. Therefore, when the resin glue is cured by ultraviolet light and the film is peeled off from the transfer roller, some glue will remain on the roller and not be taken away, which causes the film after transfer to have transparent bright spots, printed spots and other undesirable conditions. The existing treatment method is to re-engraving the transfer roller, and the service life of a single roller is low, which increases the production cost of the enterprise and causes a great waste of materials.

[0005] In view of this, it is necessary to improve the structure of the existing transfer roller. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a prism microstructure and a transfer roller to solve the problem of poor wear resistance of the existing transfer roller, thereby increasing the service life of the transfer roller, reducing glue residue, improving the product quality of the brightness enhancement film, and reducing production costs.

[0007] The utility model discloses a prismatic microstructure, comprising a first metal layer and a second metal layer, wherein the first metal layer is arranged on the wheel body of a transfer roller, the first metal layer comprises a plurality of prism structures, the prism structures are used to process prism structures with the same structure, the depth D of the prism structure is greater than the depth d of the prism structure, and the spacing W of the prism structure is greater than the spacing w of the prism structure; the second metal layer is arranged on the surface of the first metal layer, and the material wear resistance of the second metal layer is greater than the material wear resistance of the first metal layer.

[0008] Preferably, the depth D of the prism structure is in the range of d+0.5 μm≤D≤d+1 μm.

[0009] Preferably, the width W of the prism structure is in the range of w+0.5 μm≤W≤w+1 μm.

[0010] Preferably, the material of the first metal layer is copper.

[0011] Preferably, the material of the second metal layer is nickel.

[0012] Preferably, the prism structure is a triangular prism, the depth D of the prism structure is the vertical distance between the prism top and the prism bottom, and the width W of the prism structure is the distance between two adjacent prism tops.

[0013] Preferably, the thickness of the second metal layer disposed on the adjacent prism structures on the first metal layer is equal.

[0014] Preferably, the surface of the first metal layer is one or more of a planar structure, a groove structure, a mesh structure and a columnar structure.

[0015] The utility model discloses a transfer roller, comprising any of the above-mentioned prism microstructures and a wheel body, wherein the prism microstructure is arranged on the wheel body.

[0016] Preferably, the wheel body is a circular drum structure.

[0017] The beneficial effects of the utility model are:

[0018] By deepening the depth and spacing of the first metal layer compared to the target prism structure and providing a more wear-resistant second metal layer on the surface of the first metal layer, the wear resistance of the prism microstructure is improved, which alleviates the wear of the prism microstructure and makes it difficult for the glue to adhere to the surface of the worn metal layer, so that the glue is not easy to remain and is easy to wipe, thereby solving the problem of defects that are easy to appear on the brightness enhancement film product;

[0019] It can be seen that the utility model improves the wear resistance of the transfer roller, solves the problems of fast wear and easy glue residue of the existing transfer roller, increases the service life of the transfer roller, improves the product quality of the brightening film, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a schematic structural diagram of the first metal layer;

[0022] Figure 2 A comparison diagram of the dimensions of the first metal layer and the ridge structure processed thereon;

[0023] Figure 3 is a schematic diagram of a prism microstructure of the utility model;

[0024] Figure 4 This is a front view of the transfer roller of the utility model;

[0025] Figure 5 It is a side view of the transfer roller of the utility model.

[0026] Explanation of the reference numerals: 01, prism structure; 1, wheel body; 2, prismatic microstructure; 21, first metal layer; 210, prism structure; 211, prism top; 212, prism bottom; 22, second metal layer. DETAILED DESCRIPTION

[0027] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0028] Reference Figure 1-Figure 3 , is a prism microstructure 2 disclosed in the utility model, the prism microstructure 2 includes a first metal layer 21 and a second metal layer 22, wherein the first metal layer 21 is plated on the wheel body 1 of the transfer roller, the first metal layer 21 is preferably a copper plated layer, the first metal layer 21 includes a plurality of continuously and densely arranged prism structures 210, the prism structure 210 is a triangular prism, the top of the prism structure 210 is a prism top 211, the bottom of the prism structure 210 is a prism bottom 212, the vertical distance between the prism top 211 and the prism bottom 212 is the depth D of the prism structure 210, the distance between two adjacent prism tops 211 is the spacing W of the prism structure 210, and the manufacturing process of the prism structure 210 is to plate the copper layer on the wheel body 1 and then to carve it with a tool.

[0029] Reference Figure 1 and Figure 2 The above-mentioned prismatic microstructure 2 is used to process the prism structure 01 on the surface of the brightness enhancement film. The prism structure 01 has the same structure as and matches the above-mentioned prism structure 210. If the depth of the prism structure 01 on the surface of the target brightness enhancement film to be processed is d and the spacing is w, then the value range of D is d+0.5μm≤D≤d+1μm, and the value range of W is w+0.5μm≤W≤w+1μm, that is, in the first metal layer 21, the depth value and spacing value of the prism structure 210 are It is increased by 0.5 to 1 um compared to the target prism structure 01; for example, if the depth of the target brightening film prism structure 01 is 1 μm and the spacing is 20 μm, then the depth range of the prism structure 210 of the first metal layer 21 is 1.5 to 2 μm and the spacing range is 20.5 to 21 μm. The deepened and widened first metal layer 21 is used to prime the second metal layer 22, so that the second metal layer 22 can be plated on the first metal layer 21 to process the target prism structure 01.

[0030] Reference Figure 3 The second metal layer 22 is plated on the surface of the first metal layer 21. The wear resistance of the material of the second metal layer 22 is greater than that of the material of the first metal layer 21. The second metal layer 22 is preferably nickel-plated. After the second metal layer 22 is plated, an extremely thin passivation film can be quickly generated on its surface, which can resist corrosion from the atmosphere, alkali and acid. The hardness of the nickel plating is relatively high, which can improve the wear resistance of the transfer roller surface. The nickel plating is not easy to have residual resin glue and is easy to wipe, thereby solving the problems of fast wear and easy glue residue of the existing transfer roller, prolonging the service life of the transfer roller, improving the product quality of the brightening film, and reducing the production cost.

[0031] Preferably, the thickness of the second metal layer 22 disposed on the adjacent prism structures 210 on the first metal layer 21 is equal, which can ensure the consistency of the microstructure on the brightness enhancement film after embossing, so that the brightness enhancement effects of different parts of the entire brightness enhancement film remain consistent.

[0032] The above-mentioned prismatic microstructure 2 can effectively avoid glue residue on the existing wheel body 1 structure, can be blown dry with an air gun on the surface after cleaning with a degreasing agent, can wipe residual glue points, can prevent the wheel body 1 from oxidizing and rusting due to contact with atmospheric moisture after being cleaned with liquid, and can improve the scratch resistance of the surface wiping, thereby better improving the reuse rate of the transfer roller wheel body 1.

[0033] The calculation method of the slot current thickness of the nickel plating layer of the second metal layer 22 is as follows:

[0034] For example: the tank length is 500 meters, the pre-plating area required is 1㎡, and the current is 3AMP to calculate the plating thickness;

[0035] First, according to the international standard metal gram equivalent, divide it by 26.8, where the international standard metal gram equivalent is the atomic weight of the metal divided by its valence; the relative atomic mass of nickel is 58.69, and the valence is +2, so the gram equivalent is 58.69 / 2=29.35, and the electrochemical equivalent is 29.35 / 26.8=1.095 g / ampere-hour;

[0036] When nickel plating, it is known that the electrochemical amount is 1.095 grams. If the current density is 3A / 1㎡, then for a required area of ​​1㎡, electroplating for 1 hour, that is, 3 ampere hours, can plate 1.095×3=3.225 grams of nickel. Nickel is distributed on an area of ​​1㎡. Since the density of nickel is 8.9 grams / square centimeter, 3.225 / 8.9=the coating thickness is 3.6μm. Considering that the current efficiency is not 100%, the nickel plating current efficiency is generally 95%. The corrected coating thickness is 3.6×0.95=3.4μm.

[0037] In other embodiments, the surface of the first metal layer 21 can be one or more of a planar structure, a groove structure, a mesh structure, and a columnar structure; different surface structures can achieve different special brightening effects according to the design requirements of the brightening film. By designing different pattern structures on the surface of the first metal layer 21, the printed brightening film has the above-mentioned pattern, which can make the brightening film produce corresponding special optical effects.

[0038] The utility model also discloses a transfer roller, referring to Figure 4 and Figure 5 , which comprises a wheel body 1 and the above-mentioned prismatic microstructure 2 arranged on the surface of the wheel body 1, wherein the wheel body 1 is a circular drum structure.

[0039] The implementation principle and beneficial effect of the utility model are that the wear resistance of the prism microstructure 2 is improved by deepening the depth and spacing of the first metal layer 21 compared with the target prism structure 01, and arranging a more wear-resistant second metal layer 22 on the surface of the first metal layer 21, which alleviates the wear of the prism microstructure 2, making it difficult for the glue to adhere to the surface of the worn metal layer, so that the glue is not easy to remain and is easy to wipe, thereby solving the problem of defects that are easy to appear on the brightness enhancement film product;

[0040] It can be seen that the utility model improves the wear resistance of the transfer roller, solves the problems of fast wear and easy glue residue of the existing transfer roller, increases the service life of the transfer roller, improves the product quality of the brightening film, and reduces production costs.

[0041] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A prismatic microstructure, characterized in that: The invention comprises a first metal layer (21) and a second metal layer (22), wherein the first metal layer (21) is arranged on a wheel body (1) of a transfer roller, wherein the first metal layer (21) comprises a plurality of prism structures (210), wherein the prism structures (210) are used to process prism structures (01) of the same structure, wherein a depth D of the prism structures (210) is greater than a depth d of the prism structures (01), and a spacing W of the prism structures (210) is greater than a spacing w of the prism structures (01); The second metal layer (22) is arranged on the surface of the first metal layer (21), and the wear resistance of the material of the second metal layer (22) is greater than the wear resistance of the material of the first metal layer (21).

2. The prismatic microstructure according to claim 1, characterized in that: The depth D of the prism structure (210) is in the range of d+0.5 μm≤D≤d+1 μm.

3. The prismatic microstructure according to claim 1, characterized in that: The width W of the prism structure (210) is in the range of w+0.5 μm≤W≤w+1 μm.

4. The prismatic microstructure according to any one of claims 1 to 3, characterized in that: The material of the first metal layer (21) is copper.

5. The prismatic microstructure according to any one of claims 1 to 3, characterized in that: The material of the second metal layer (22) is nickel.

6. The prismatic microstructure according to any one of claims 1 to 3, characterized in that: The prism structure (210) is a triangular prism, the depth D of the prism structure (210) is the vertical distance between the prism top (211) and the prism bottom (212), and the width W of the prism structure (210) is the distance between two adjacent prism tops (211).

7. The prismatic microstructure according to claim 1, characterized in that: The thickness of the second metal layer (22) disposed on the adjacent prism structures (210) on the first metal layer (21) is equal.

8. The prismatic microstructure according to claim 1, characterized in that: The surface of the first metal layer (21) is one or more of a planar structure, a groove structure, a mesh structure and a columnar structure.

9. A transfer roller, characterized in that: It comprises the prismatic microstructure (2) and the wheel body (1) as claimed in any one of claims 1 to 8, wherein the prismatic microstructure (2) is arranged on the wheel body (1).

10. The transfer roller according to claim 9, characterized in that: The wheel body (1) is a circular drum structure.

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