Manufacturing method of rough surface of alignment film printing plate

Abstract

The invention discloses a manufacturing method of a rough surface of an alignment film printing plate. The manufacturing method comprises the following steps: S1, preparing a smooth resin plate without a rough surface; s2, the prepared smooth resin plate is attached to the surface of a roller carrier of a laser engraving machine, and the resin face of the smooth resin plate faces outwards; s3, a TIF-gear salient point drawing is imported, and parameters of a laser engraving machine are adjusted; s4, the laser engraving machine is started to start laser engraving of the rough surface; s5, cleaning and drying after carving is finished. According to the manufacturing method, plate making is conducted in a carving mode, and demolding is not needed; the power of the laser engraving machine can be increased or the rotating speed can be reduced to engrave a high-depth rough surface, namely printing of a high-film-thickness product can be achieved; according to the method, the rough surface structure type can be adjusted and changed according to drawing changes and equipment parameters, mold opening is not needed again, the research and development cost is low, and the drawing time is short.

Description

Technical Field

[0001] The present invention relates to the field of methods for making a rough surface of an alignment film printing plate. More specifically, the present invention relates to a method for making a rough surface of an alignment film printing plate. Background Art

[0002] Alignment film printing refers to the use of a PI printing machine to transfer ink (PI liquid) to a flexible photosensitive resin plate through an anilox roller to print on a glass substrate. It is a type of relief printing process, referred to as flexographic printing. The printing part of the alignment film printing plate is raised. During printing, the anilox roller evenly applies a certain thickness of ink (PI liquid) layer to the part to be printed on the printing plate, and then under the action of the pressure of the embossing roller, the ink (PI liquid) layer of the part to be printed is transferred to the surface of the substrate to form a layer of alignment film. At present, most manufacturers of alignment film printing plates use embossing and film exposure processes for the rough surface of their plates. The embossing process is currently used in the factory. The production process is to laminate the photosensitive resin and the embossed film, then expose them to UV light, and finally separate the embossed film to obtain a printing plate with a rough surface. Currently, the rough surfaces that can be made by embossing and film exposure processes are Type 4 and Type 9, which can meet the printing needs of the mid- and low-end markets. However, the printing results for products with high film thickness are still not good. To meet the needs of high-end products, it is necessary to re-open the mold, develop and produce new embossed films and rough surfaces, which has high R&D costs, long production time and high costs. In addition, if a high-depth embossed film is used, it will be difficult to demold after exposure. Summary of the invention

[0003] In view of the problems that the printing film thickness in the prior art is low and cannot correspond to the printing of high-end and high-thickness products; the film surface type is single, the cost and time of new mold development are high; when the embossing process is used to make a high-depth plate, it is difficult to remove the film after exposure (the contact area between the film and the resin is large), in order to solve the above technical problems and to achieve other advantages of the present invention, a preferred embodiment of the present invention provides a method for preparing a rough surface of an alignment film printing plate, comprising the following steps:

[0004] S1, preparing a smooth resin plate without rough surface;

[0005] S2, attaching the prepared smooth resin plate to the surface of the roller carrier of the laser engraving machine, with the resin surface of the smooth resin plate facing outwards;

[0006] S3, import the convex dot drawing into the supporting software of the laser engraving machine, and adjust the parameters of the laser engraving machine;

[0007] S4, start the laser engraving machine to start laser engraving the rough surface;

[0008] S5. Clean and dry after engraving.

[0009] According to a preferred embodiment of the present invention, PET is laid on the exposure platform of an exposure machine, and then resin is coated and exposed to light, so that a smooth resin plate without rough surface can be obtained.

[0010] According to a preferred embodiment of the present invention, in S3, the parameters of the laser engraving machine are: EPR=10; ES=700; POWER=60; wherein, POWER=60, that is, the power of the laser engraving machine is 60W; ES=700, the distance the drum rotates per second is 700cm; EPR=10, that is, the laser head is controlled to move forward 10um for each rotation of the drum.

[0011] According to a preferred embodiment of the present invention, the laser engraving machine is a drum straight-beam CO2 laser.

[0012] According to a preferred embodiment of the present invention, the drum size is The maximum power is 400W and the spot diameter is 5μm.

[0013] The present invention includes at least the following beneficial effects: the production method of the present invention makes a plate by engraving, and there is no need to remove the film; the present invention can also increase the power of the laser engraving machine or reduce the rotation speed to engrave a high-depth rough surface, which can correspond to the printing of high-thickness products; in the present invention, the rough surface structure type can be changed according to the changes in the drawings and the adjustment of equipment parameters, without the need to re-open the mold, with low R&D costs and short drawing time.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the steps of the method for making the rough surface of the alignment film printing plate in the present invention.

[0016] Figure 2 This is a diagram showing the distribution of equipment in the process of making the rough surface of the alignment film printing plate of the present invention.

[0017] Figure 3 It is a bump drawing in Tiff file format in the present invention.

[0018] Figure 4 This is a 3D topography of the rough surface of the alignment film printing plate in the present invention.

[0019] Figure 5 The diagram shows the measurement process of using an optical instrument to measure the rough surface of the alignment film printing plate prepared by the present invention.

[0020] Figure 6 It is the SEM printing film thickness of the rough surface of the alignment film printing plate prepared in the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0024] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0025] like Figure 1-6 As shown, a preferred embodiment of the present invention provides a method for manufacturing a rough surface of an alignment film printing plate, comprising the following steps:

[0026] S1, preparing a smooth resin plate 1 without rough surface;

[0027] Specifically, PET is laid on the exposure platform of the exposure machine, and then resin is coated and exposed to light, so that a smooth resin plate without rough surface can be obtained.

[0028] S2, attaching the prepared smooth resin plate to the surface of the roller carrier 2 of the laser engraving machine, with the resin surface of the smooth resin plate 1 facing outwards, so that the laser can engrave the resin surface of the smooth resin plate 1;

[0029] S3. Import the convex dot drawing (Tiff file format) into the supporting software of the laser engraving machine and adjust the parameters of the laser engraving machine;

[0030] Among them, the TIF file convex dot drawing is composed of black and white pixels, black is not engraved, white is engraved, the drawing resolution is 6350, and the drawing layout is The circles are arranged in a staggered manner with a horizontal spacing of 16um and a vertical spacing of 0.

[0031] S4, starting the laser engraving machine to laser engrave the rough surface, wherein the laser light outlet 3 of the laser engraving machine emits laser;

[0032] S5. Clean and dry after engraving.

[0033] The production method of the present invention makes a plate by engraving, and there is no need to remove the film; the present invention can also increase the power of the laser engraving machine or reduce the rotation speed to engrave a high-depth rough surface, which can correspond to the printing of high-thickness products; in the present invention, the rough surface structure type can be changed according to the changes in the drawings and the adjustment of equipment parameters, without the need to re-open the mold, with low R&D costs and short drawing time.

[0034] According to a preferred embodiment of the present invention, in S3, the parameters of the laser engraving machine are: EPR=10; ES=700; POWER=60; wherein, POWER=60, that is, the power of the laser engraving machine is 60W; ES=700, the distance the drum rotates per second is 700cm; EPR=10, that is, the laser head is controlled to move forward 10um for each rotation of the drum.

[0035] Among them, EPR=10, that is, the laser head moves forward 10um when the drum rotates one circle, the smaller the EPR value, the finer the engraving ES=700 (that is, the distance the drum rotates per second is 700cm, the larger the ES, the faster the processing speed and the shallower the engraving depth), POWER=60 (that is, the power of the laser engraving machine is 60W, the larger the power, the deeper the engraving), and the engraving starts after adjustment; according to the production method and equipment parameters, a circular boss rough surface with a height of 13 to 15um can be processed, the printing film thickness can reach 1000 to 1100 angstroms, and the number of lines and the opening rate of the layout can be adjusted through the drawing layout.

[0036] During laser engraving, the power of the laser engraving machine can be increased or the speed can be reduced to engrave a high-depth rough surface, which can correspond to the printing of high-thickness products;

[0037] During laser engraving, the power of the laser engraving machine can be increased or the speed can be reduced to engrave a high-depth rough surface, which can correspond to the printing of high-thickness products;

[0038] The rough surface structure type can be changed according to the drawing changes and equipment parameter adjustments, without the need to re-open the mold, low R&D cost, and short drawing time;

[0039] According to a preferred embodiment of the present invention, the laser engraving machine is a drum straight beam CO2 laser, and the drum size is The maximum power is 400W and the spot diameter is 5μm.

[0040] in, Figure 4This is a 3D topography of the rough surface of the alignment film printing plate in the present invention. The orange color is the top of the boss, the dots below are the low points, and the red frame shows the high and low distance scale, indicating that the boss height is about 12um.

[0041] At present, the mass-produced resin plate (made by embossing process) is about 900 to 1000 angstroms. Figure 5 The diagram shows the measurement process of the rough surface of the alignment film printing plate prepared by the present invention measured by an optical instrument. It can be seen from the blank that the film thickness after printing by the present invention can reach 1100 angstroms, and its printed film thickness is better than the current mass-produced printed film thickness. Figure 6 The printed film thickness was measured using a scanning electron microscope (SEM), and repeated verification showed that the film thickness was indeed significantly improved.

[0042] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for preparing a rough surface of an alignment film printing plate, characterized in that: The following steps are involved: S1, preparing a smooth resin plate without rough surface; S2, attaching the prepared smooth resin plate to the surface of the roller carrier of the laser engraving machine, with the resin surface of the smooth resin plate facing outwards; S3, import the convex dot drawing into the supporting software of the laser engraving machine, and adjust the parameters of the laser engraving machine; S4, start the laser engraving machine to start laser engraving the rough surface; S5. Clean and dry after engraving.

2. The method for preparing a rough surface of an alignment film printing plate according to claim 1, characterized in that: Place PET on the exposure platform of the exposure machine, then apply resin and expose it to get a smooth resin plate without rough surface.

3. The method for manufacturing a rough surface of an alignment film printing plate according to claim 1, characterized in that: In S3, the parameters of the laser engraving machine are: EPR=10; ES=700; POWER=60; wherein, POWER=60, that is, the power of the laser engraving machine is 60W; ES=700, the distance the drum rotates per second is 700cm; EPR=10, that is, the laser head is controlled to move forward 10um for each rotation of the drum.

4. The method for manufacturing a rough surface of an alignment film printing plate according to claim 3, characterized in that: The laser engraving machine is a drum straight beam CO2 laser.

5. The method for manufacturing a rough surface of an alignment film printing plate according to claim 4, characterized in that: The drum size is The maximum power is 400W and the spot diameter is 5μm.

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