Novel color printing film applied to membrane switch panel

Abstract

The utility model discloses a novel color printing film applied to a membrane switch panel, which comprises a protective layer, an adhesive layer, a second functional coating, a color pattern printing layer, a first functional coating and a printing material layer, the protective layer, the adhesive layer, the second functional coating layer, the colored pattern printing layer, the first functional coating layer and the printing material layer are sequentially arranged from top to bottom. By adopting the digital printing technology, the color printing effect of the color pattern printing layer can be achieved through the one-time transfer printing technology, registration printing is avoided, the printing technology is simplified, the product delivery time is shortened, the production cost is reduced, the color pattern printing layer solves the original problem that the color is single, the effect is more vivid, and the product quality is improved. And use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of printed films, in particular to a new type of color printed film applied to a membrane switch panel. Background Art

[0002] With the continuous improvement of terminal market demand, the membrane switch panels of kitchen appliances such as microwave ovens, coffee machines, rice cookers, dishwashers, etc. urgently need to be upgraded from the original single color and simple design to colorful patterned ones to generate realistic new panels. However, the current printing of printed films is mainly silk screen printing, which has relatively single silk screen color, poor realistic effect and low printing resolution. In the prior art, a combination of silk screen printing and offset printing is used to solve the problem of monotonous silk screen color. Due to the combined printing, the control of positioning between different printings cannot be avoided, which has high technical requirements for equipment and operators, increases production costs, and cannot meet the use needs. Based on the above situation, we propose a new color printed film for membrane switch panels. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a new color printing film applied to a membrane switch panel.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A new color printed film applied to a membrane switch panel comprises a protective layer, an adhesive layer, a second functional coating layer, a color pattern printed layer, a first functional coating layer and a printed material layer, wherein the protective layer, the adhesive layer, the second functional coating layer, the color pattern printed layer, the first functional coating layer and the printed material layer are arranged in sequence from top to bottom.

[0006] Preferably, the protective layer is used to protect the entire printed film from being scratched and dirty during movement, storage and transportation. It is a process part that will be peeled off by the assembly plant and will not enter the final product. It is a non-optional layer and can be selected according to customer needs. The material of the protective layer is transparent PET with a thickness of 25μm. The protective layer and the second layer of functional coating are bonded and fixed by an adhesive layer.

[0007] Preferably, the adhesive layer is a silicone connector, which has an adhesion to the steel plate of 10-20gf / 24mm, good temperature resistance and high stability, and is a non-essential layer.

[0008] Preferably, the second functional coating layer is a friction-resistant matte oil with a coating thickness of 1-2 μm and a haze H in the fully light-transmitting area between 50% and 60%. A flexographic printing device is used for printing the second functional coating layer, and the printing parameters required are an anilox roller of 600 lpi, an ink volume of 3.5 BCM, and a printing speed of 20 M / min.

[0009] Preferably, the color pattern printing layer is formed by mixing 20 parts of electronic ink in which 1-2 microns-sized pigment particles are wrapped by resin with negative electrons, and the pigment particles are four colors of C cyan, M magenta, Y yellow and K black. The four-color ink of C cyan, M magenta, Y yellow and K black is obtained by configuring 70 parts of image oil carrier. When printing the color pattern printing layer 40, the printing resolution is 812 dpi or 1200 dpi, the screening is 180 lpi or 210 lpi, the printing ink density is set to 1.45 for C cyan, 1.45 for M magenta, 1.05 for Y yellow and 1.8 for K black, and the ink conductivity is 90 pico.

[0010] Preferably, the first functional coating layer is a colorless and odorless aqueous primer with a pH value of 9.5-11.5. The coating is used to enhance the bonding strength between the electronic ink of the color pattern printing layer and the printing material layer, which are hinged by chemical molecular bonds.

[0011] Preferably, the material of the printing material layer is one of PVC film, PC film or PET transparent film material.

[0012] Compared with the existing technology, the beneficial effects of the utility model are:

[0013] By applying digital printing technology to the color pattern printing layer of the membrane switch panel, the effect of color printing is achieved by one-time transfer technology, which avoids overprinting, simplifies the printing process, reduces production costs, and solves the problem of single color of the original color pattern printing layer, and the effect is more realistic;

[0014] The second functional coating protects the inner color pattern printing layer on the one hand, and acts as a diffusion film on the other hand, eliminating the diffusion film layer in the membrane switch panel, reducing costs, and providing a thicker layout space for the circuit layer in the display module.

[0015] The utility model adopts digital printing technology to achieve the effect of color printing on the color pattern printing layer through a one-time transfer technology, avoids overprinting, simplifies the printing process, shortens product delivery time, reduces production costs, and the color pattern printing layer solves the problem of the original single color, and the effect is more realistic, meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic structural diagram of a new color printed film applied to a membrane switch panel.

[0017] In the figure: 10, protective layer; 20, adhesive layer; 30, second functional coating layer; 40, color pattern printing layer; 50, first functional coating layer; 60, printing material layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1 A new color printed film for a membrane switch panel includes a protective layer 10, an adhesive layer 20, a second functional coating layer 30, a color pattern printed layer 40, a first functional coating layer 50 and a printed material layer 60, wherein the material of the printed material layer 60 is one of a PVC film, a PC film or a PET transparent film material, the protective layer 10, the adhesive layer 20, the second functional coating layer 30, the color pattern printed layer 40, the first functional coating layer 50 and the printed material layer 60 are arranged in sequence from top to bottom, wherein the protective layer 10 is used to protect the entire printed film from being scratched and dirty during movement, storage and transportation, and is a process part that will be peeled off by the assembly plant and will not enter the final product. It is a non-essential layer and can be selected according to customer needs, the material of the protective layer 10 is transparent PET with a thickness of 25 μm, and the protective layer 10 and the second functional coating layer 30 are bonded and fixed by the adhesive layer 20;

[0020] The adhesive layer 20 is a silicone connector, and has an adhesion of 10-20gf / 24mm to the steel plate, good temperature resistance, and high stability. It is a non-essential layer; the second functional coating layer 30 is a friction-resistant matte oil, and the coating thickness is 1-2μm, and the haze H of the full light-transmitting area is between 50% and 60%. When printing the second functional coating layer 30, a flexographic printing device is used, and its printing parameter requirements are an anilox roller of 600lpi, an ink volume of 3.5BCM, and a printing speed of 20M / min. Through the setting of the second functional coating layer 30, on the one hand, the inner color pattern printing layer 40 is protected, and on the other hand, the effect of a diffusion film is played, eliminating the diffusion film layer in the membrane switch panel, reducing costs, and providing a thicker arrangement space for the circuit layer in the display module;

[0021] The color pattern printing layer 40 is formed by mixing 20 parts of electronic ink with 1-2 microns pigment particles wrapped by resin with negative electrons, and the pigment particles are four colors of C cyan, M magenta, Y yellow and K black. The four-color ink of C cyan, M magenta, Y yellow and K black is obtained by preparing 70 parts of image oil carrier. When printing the color pattern printing layer 40, the printing resolution is 812dpi or 1200dpi, the screening is 180lpi or 210lpi, the printing ink density is set to 1.45 for C cyan, 1.45 for M magenta, 1.05 for Y yellow and 1.8 for K black, and the ink conductivity is 90pico. The first functional coating layer 50 is a layer of colorless and odorless water-based primer with a pH value of 9.5- 11.5. The coating is used to enhance the bonding force between the electronic ink and the printing material layer of the color pattern printing layer 40, which are hinged by chemical molecular bonds. The utility model adopts digital printing technology to achieve the effect of color printing on the color pattern printing layer 40 through a one-time transfer technology, thereby avoiding overprinting, simplifying the printing process, shortening product delivery time, and reducing production costs. The color pattern printing layer 40 solves the problem of the original single color, and the effect is more realistic, meeting the use requirements.

[0022] Working principle: When printing, first select a suitable printing material layer 60, use flexographic printing equipment to perform surface dust removal, surface polarity treatment and coating treatment on the selected printing material layer 60, the coating is the first functional coating 50, and is a layer of colorless and odorless water-based primer. The treated material coating surface can be 40-50 dahns. Then, pre-press treatment is performed on the drawings to be printed, the bitmap of the opaque area is vectorized, and the fully transparent area is hollowed out. The processed drawings are output in PDF format, and then the HP The laser imaging digital printing machine of Indigo6800 RIPs the processed PDF file to the printing machine. During the RIP process, the corresponding screening curve is loaded to control the printing parameters of the ink in the semi-transparent area. The screening curve can be obtained through the first printing proof. Before printing, the number of printing passes of the ink in the opaque area is set to 6 to 8 times to achieve the light-shielding effect. The printing speed is automatic, and the printing resolution is 812dpi or 1200dpi. The screening is 180lpi or 210lpi. During printing, the ink moves to the imaging plate under the action of the electric field according to the imaging content, and then transfers to the rubber blanket through the imaging plate. Finally, all the ink is transferred from the rubber blanket printing plate to the printing material at one time, thereby obtaining a color pattern printing layer 40, and the temperature control range of the rubber blanket is 105℃-110℃, and the transfer pressure is 250g-270g. This printing method does not have the problem of multiple color transfers and overlay caused by combined printing, avoids overlay printing, simplifies the printing process, and reduces production costs.

[0023] Next, a second layer of functional coating 30 is printed on the printed material using a flexographic printing device. The functional coating is used to protect the color pattern printing layer 40 and replace the function of the diffusion film. Finally, a low-viscosity PET transparent film is coated on the second layer of functional coating 30 through the adhesive layer 20. After the coating, the color film is die-cut according to the shape requirements of the terminal display module, thereby completing the printing and production of the new color printed film. By printing the second layer of functional coating 30, on the one hand, the inner color pattern printing layer 40 is protected, and on the other hand, the effect of the diffusion film is played, thereby eliminating the diffusion film layer in the membrane switch panel, reducing costs, and providing a thicker layout space for the circuit layer in the display module.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new color printed film for membrane switch panel, characterized in that: The invention comprises a protective layer (10), an adhesive layer (20), a second functional coating layer (30), a color pattern printing layer (40), a first functional coating layer (50) and a printing material layer (60), wherein the protective layer (10), the adhesive layer (20), the second functional coating layer (30), the color pattern printing layer (40), the first functional coating layer (50) and the printing material layer (60) are arranged in sequence from top to bottom.

2. The novel color printed film for use in a membrane switch panel according to claim 1, characterized in that: The protective layer (10) is used to protect the entire printed film from being scratched or dirty during movement, storage and transportation. It is a process part that will be peeled off by the assembly plant and will not enter the final product. It is a non-essential layer and can be selected according to customer needs. The material of the protective layer (10) is transparent PET with a thickness of 25 μm. The protective layer (10) and the second functional coating layer (30) are bonded and fixed by an adhesive layer (20).

3. The new color printed film for membrane switch panel according to claim 1, characterized in that: The adhesive layer (20) is a silicone bonding agent, has an adhesion to the steel plate of 10-20 gf / 24 mm, good temperature resistance and high stability, and is a non-essential layer.

4. The new color printed film for membrane switch panel according to claim 1, characterized in that: The second functional coating layer (30) is a friction-resistant matte oil, the coating thickness is 1-2 μm, and the haze H of the fully transparent area is between 50% and 60%. When printing the second functional coating layer (30), a flexographic printing device is used, and the printing parameter requirements are an anilox roller of 600 lpi, an ink deposit of 3.5 BCM, and a printing speed of 20 M / min.

5. The new color printed film for membrane switch panel according to claim 1, characterized in that: The first functional coating layer (50) is a colorless and odorless aqueous primer with a pH value of 9.5-11.

5. The coating is used to enhance the bonding strength between the electronic ink of the color pattern printing layer (40) and the printing material layer, and the two are hinged by chemical molecular bonds.

6. The new color printed film for membrane switch panel according to claim 1, characterized in that: The material of the printing material layer (60) is one of PVC film, PC film or PET transparent film material.

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