Process method of anti-counterfeiting holographic laser plating medium transparent color film

Abstract

The invention provides a process method of an anti-counterfeiting holographic laser plating medium transparent color film, which comprises the following steps: S1, coating a base film with a coating to obtain a coating film; s2, transferring graphic and text information to the coating film to obtain a holographic laser film to be coated; and S3, the holographic laser to-be-coated film is subjected to evaporation in an evaporator, and the laser medium transparent color film is obtained. The anti-fake holographic laser plating medium transparent color film process method has the advantages of being simple in manufacturing process, low in cost, simple and good in visual effect, distinct in mould pressing image-text information, large in imitation difficulty and stable in coating environment-friendly performance.

Description

Technical Field

[0001] The invention relates to the technical field of anti-counterfeiting holographic laser-plated medium transparent color film production, in particular to a process method for anti-counterfeiting holographic laser-plated medium transparent color film. Background Art

[0002] Anti-counterfeiting holographic laser plated medium transparent color film is a laser color film with anti-counterfeiting function plated on a transparent ring using laser holographic anti-counterfeiting technology. This technology uses a molded hologram transparent resin film and continuously evaporates a high-refractive index medium protective layer on its relief surface, so that the reproduction angle of the hologram is exactly equal to the reflection angle formed by the two media, thereby realizing a truly "transparent" holographic film. This color film not only has a strong anti-counterfeiting effect, but also has a special visual effect.

[0003] The production process of rainbow film is currently multi-layer co-extrusion casting, and the color is generated by multi-layer interface interference. A patent application with the publication number CN111844665A discloses a rainbow film production device and its application method, which uses solid resin particles as raw materials, heats and melts them, and then uses a filter to remove unmelted particles and impurities mixed in the molten liquid, passes them into a co-extrusion mold and passes through a cooling roller to quickly cool and shape them to form a rainbow film. However, the process of this solution is complicated and forced cooling must be performed to shape the co-extruded resin, which requires a large amount of energy.

[0004] The vacuum evaporation of traditional color films relies on the uneven thickness of the target material deposited on the substrate during evaporation and sublimation. A patent with the announcement number CN111501007B discloses a transverse rainbow film production device and its coating process. The device uses a regular prism-shaped main drum, and the frequency converter controls the frequency conversion motor to adjust the speed to achieve non-uniform speed through the evaporation boat side by side design, so that the coating thickness is uneven in the transverse direction, thereby achieving a variety of colors in the transverse direction. This patent requires special modifications to the evaporation equipment, and the rainbow film prepared by it achieves horizontal color stripes on the entire film surface. The above-mentioned coating process has a complex manufacturing process, high cost, and poor visual effect. Summary of the invention

[0005] The invention provides a process method for anti-counterfeiting holographic laser-plated medium transparent color film, and its purpose is to solve the technical problems of complex manufacturing process, high cost and poor visual effect in the background technology.

[0006] In order to achieve the above-mentioned object, the present invention provides a process for anti-counterfeiting holographic laser-plated medium transparent color film, comprising the following steps:

[0007] Step S1, applying the coating to the base film to obtain a coating film;

[0008] Step S2, transferring the graphic information onto the coating film to obtain a holographic laser coating film;

[0009] Step S3, vapor-depositing the holographic laser film in a vapor deposition machine to obtain a laser medium transparent color film.

[0010] Preferably, the coating application method comprises the following steps:

[0011] Step S11, placing the coating in a material tank, maintaining the placement temperature of the coating, and controlling the viscosity;

[0012] Step S12: applying the coating onto the base film by means of a coating device.

[0013] Preferably, in step S11:

[0014] The coating comprises 45-55 parts of acrylic resin, 12-17 parts of ethanol, 10-18 parts of water-based wax emulsion, 2-7 parts of diethylene glycol, 1-5 parts of wetting agent, 0.1-2 parts of defoaming agent and 10-25 parts of water;

[0015] The placement temperature of the coating is any temperature between 19°C and 25°C;

[0016] Control the coating viscosity to any viscosity between 13s-28s;

[0017] The method for controlling the viscosity of the coating is: adding a solvent dropwise into the coating, wherein the solvent comprises at least one of alcohol, ethyl acetate and n-propyl acetate.

[0018] Preferably, the coating equipment comprises an unwinder, a coating roller, an oven, a cooling roller and a winder;

[0019] The step S12 specifically includes: placing the base film on the unwinder, and passing through the coating roller, the oven and the cooling roller in sequence, and connected to the coating winder; wherein:

[0020] The angle between the coating area and the base film is 15°-45° and the pressure is 1kgf / cm 2 -5kgf / cm 2 The coating is applied to the base film on the outer wall of the coating roller using a scraper.

[0021] Preferably, the equipment for obtaining the holographic laser film to be coated in step S2 includes a film pressing unwinder, a film pressing roller, a rubber pressing roller and a film pressing winder;

[0022] The film pressing plate roller comprises a film pressing holographic laser working plate and a plate roller, wherein the film pressing holographic laser working plate is arranged on the outer periphery of the plate roller;

[0023] The step S2 specifically includes: placing the coated film on a film pressing unwinder, transferring the graphic information on the film pressing holographic laser working plate to the coating surface of the coated film through the film pressing roller, and obtaining a holographic laser film to be plated.

[0024] Preferably, the plate roller comprises a plate roller tube wall, a hot liquid channel is arranged in the plate roller tube wall, and the hot liquid temperature is 160-180°C.

[0025] Preferably, the evaporation machine in step S3 is a vacuum evaporation machine;

[0026] The vacuum evaporation machine comprises a vacuum chamber and an evaporation tank, a baffle, a film unwinder to be coated, a guide roller, a main drum, a winding shaft and a cooling system arranged therein;

[0027] The evaporation tank is arranged below the baffle, and the unwinding machine for coating, the guide roller, the main drum and the winding shaft are arranged above the baffle.

[0028] Preferably, a quartz tube and a molybdenum boat are provided in the evaporation tank. The quartz tube is provided at the bottom of the evaporation tank, and the molybdenum boat is provided above the quartz tube. The molybdenum boat is parallel to the quartz tube, and the molybdenum boat is connected to the positive and negative electrode seats in the evaporation tank.

[0029] Preferably, step S3 comprises the following steps:

[0030] Step S31, placing the holographic laser film to be coated above the evaporation tank in the vacuum chamber;

[0031] Step S32, stacking at least one zinc sulfide metal powder block in a triangle shape and evenly arranging the blocks in a vertical direction in an evaporation tank for evaporation deposition;

[0032] Step S33, replacing the specially prepared mixed copper sulfide powder block and performing vapor deposition again to obtain a laser medium transparent color film.

[0033] Preferably, in step S32, the vacuum chamber is evacuated to 9.8×10 -2 Pa, the temperature in the evaporation tank rises to about 1100° C., and evaporation is started at a speed of 500 m / min; in the step S33, the specially prepared mixed copper sulfide powder block is a powder block with a ratio of zinc sulfide to copper sulfide of 3:1.

[0034] The process of the anti-counterfeiting holographic laser-plated medium transparent color film of the present invention has the following beneficial effects:

[0035] The anti-counterfeiting holographic laser plated medium transparent color film process method of the present invention adopts the following process flow: coating the surface of the auxiliary material PET film → molding the anti-counterfeiting holographic laser transfer coating → placing the film to be plated just above the evaporation tank in the vacuum evaporation chamber → stacking the zinc sulfide powder blocks in a triangle in the vertical direction and evenly arranging them in the evaporation tank for vacuum heating evaporation → replacing the mixed copper sulfide powder blocks and repeating the evaporation medium → cooling and releasing the pressure to take out the evaporated film → transferring it to the printing substrate. It has the characteristics of simple production process, low cost, concise and good visual effect, clear molded graphic information, great difficulty in imitation, and stable environmental protection performance of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flow chart of a preferred embodiment of a process method for anti-counterfeiting holographic laser-plated medium transparent color film of the present invention;

[0037] Figure 2 The present invention is a schematic structural diagram of a preferred embodiment of a device for obtaining a holographic laser film to be coated in a process method for coating a medium transparent color film with an anti-counterfeiting holographic laser.

[0038] Figure 3 It is a structural schematic diagram of a preferred embodiment of a vacuum evaporation machine of a process method for anti-counterfeiting holographic laser plating medium transparent color film of the present invention;

[0039] Figure 4 It is a structural schematic diagram of a preferred embodiment of a quartz tube and a molybdenum boat in a process method for anti-counterfeiting holographic laser plating a medium transparent color film of the present invention;

[0040] Figure 5 The present invention is a structural schematic diagram of a preferred embodiment of a process method for forming an anti-counterfeiting holographic laser-plated medium transparent color film, in which zinc sulfide metal powder blocks are evenly arranged in a triangular stack in the vertical direction. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0042] In view of the existing problems, the present invention provides a process for anti-counterfeiting holographic laser-plated medium transparent color film, such as Figure 1 As shown, the following steps are included:

[0043] Step S1, applying the coating to the base film to obtain a coating film;

[0044] Step S2, transferring the graphic information onto the coating film to obtain a holographic laser coating film;

[0045] Step S3, vapor-depositing the holographic laser film in a vapor deposition machine to obtain a laser medium transparent color film.

[0046] In step S1, the coating application method comprises the following steps:

[0047] Step S11, placing the coating in a material tank, maintaining the placement temperature of the coating, and controlling the viscosity;

[0048] The coating comprises 45-55 parts of acrylic resin, 12-17 parts of ethanol, 10-18 parts of water-based wax emulsion, 2-7 parts of diethylene glycol, 1-5 parts of wetting agent, 0.1-2 parts of defoaming agent and 10-25 parts of water.

[0049] In this embodiment, the coating formula is environmentally friendly, water-based, and has good film-forming properties.

[0050] In Example 1, there are 45 parts of acrylic resin, 17 parts of ethanol, 10 parts of aqueous wax emulsion, 2 parts of diethylene glycol, 5 parts of wetting agent, 2 parts of defoaming agent, and 25 parts of water.

[0051] In Example 2, there are 55 parts of acrylic resin, 12 parts of ethanol, 18 parts of aqueous wax emulsion, 7 parts of diethylene glycol, 1 part of wetting agent, 0.1 part of defoaming agent, and 10 parts of water.

[0052] In Example 3, there are 50 parts of acrylic resin, 15 parts of ethanol, 15 parts of aqueous wax emulsion, 5 parts of diethylene glycol, 2 parts of wetting agent, 0.2 parts of defoaming agent, and 15 parts of water.

[0053] The placement temperature of the coating is any temperature between 19°C and 25°C; in this embodiment, the placement temperature is 25°C;

[0054] Control the coating viscosity to any viscosity between 13s-28s;

[0055] The method for controlling the viscosity of the coating is: adding a solvent dropwise into the coating, wherein the solvent comprises at least one of alcohol, ethyl acetate and n-propyl acetate.

[0056] Step S12: applying the coating onto the base film by a coating device to obtain a coating film.

[0057] The coating equipment includes an unwinder, a coating roller, an oven, a cooling roller and a winder;

[0058] The step S12 specifically includes: placing the base film on the unwinder, and passing it through the coating roller, the oven and the cooling roller in sequence to obtain a treated coating film, and the coating film is connected to the coating winder; wherein:

[0059] The angle between the coating area and the base film is 15°-45° and the pressure is 1kgf / cm 2 -5kgf / cm 2 The coating is applied to the base film on the outer wall of the coating roller using a scraper.

[0060] like Figure 2 As shown, the equipment for obtaining the holographic laser film to be coated in step S2 includes a film pressing unwinding machine 1, a film pressing roller 2, a rubber pressing roller 3 and a film pressing winding machine 4;

[0061] The film pressing roller 2 comprises a film pressing holographic laser working plate 21 and a plate roller 22, wherein the film pressing holographic laser working plate 21 is arranged on the outer periphery of the plate roller 22;

[0062] The step S2 specifically includes: placing the processed coating film on the film pressing unwinding machine 1, transferring the graphic information on the film pressing holographic laser working plate 21 to the coating surface of the coating film through the film pressing roller 2, and obtaining the holographic laser coating film.

[0063] The plate roller 22 includes a plate roller tube wall, and a hot liquid channel is provided in the plate roller tube wall, and the hot liquid temperature is 160-180° C. In this embodiment, the plate roller 22 is heated by the hot liquid in the hot liquid channel, so that the graphic information on the film-pressed holographic laser working plate 21 is transferred to the coating surface of the coating film.

[0064] The evaporation machine in step S3 is a vacuum evaporation machine;

[0065] The use of vacuum evaporation can reduce consumables and ensure uniform coating.

[0066] like Figure 3 As shown, the vacuum evaporation machine includes a vacuum chamber and an evaporation tank 5, a baffle 6, a film unwinding machine 7, a guide roller 8, a main drum 9, a winding shaft 10 and a cooling system 11 arranged therein;

[0067] The evaporation tank 5 is arranged below the baffle 6 , and the unwinding machine 7 , the guide roller 8 , the main drum 9 , and the winding shaft 10 are arranged above the baffle 6 .

[0068] like Figure 4 As shown, a quartz tube 51 and a molybdenum boat 52 are provided in the evaporation tank 5. The quartz tube 51 is provided at the bottom of the evaporation tank 5, and the molybdenum boat 52 is provided above the quartz tube 51. The molybdenum boat 52 is parallel to the quartz tube 51, and the molybdenum boat 52 is connected to the positive and negative electrode seats in the evaporation tank 5.

[0069] The step S3 comprises the following steps:

[0070] Step S31, placing the holographic laser film to be coated above the evaporation tank 5 in the vacuum chamber;

[0071] Step S32: at least one zinc sulfide metal powder block is evenly arranged in a triangle shape in the vertical direction and placed in the evaporation tank 5 for evaporation deposition. Figure 5 As shown; the vacuum chamber is evacuated to 9.8×10 -2Pa, the temperature in the evaporation tank 5 rises to about 1100°C, and evaporation is started at a speed of 500 m / min;

[0072] Step S33, replacing the specially prepared mixed copper sulfide powder block and performing evaporation again to obtain a laser medium transparent color film; the specially prepared mixed copper sulfide powder block is a powder block with a ratio of zinc sulfide to copper sulfide of 3:1.

[0073] In this embodiment, the zinc sulfide metal powder blocks are evenly arranged in a triangle in the vertical direction and placed on the molybdenum boat 52 for evaporation, which can make the evaporation uniform. Zinc sulfide plus copper sulfide can produce special light effects, and the long-term stability of color is excellent. The benefits of triangular stacking: wide coverage, uniform coating, and increased single evaporation length.

[0074] The process of the anti-counterfeiting holographic laser-plated medium transparent color film of the present invention has the following beneficial effects:

[0075] The anti-counterfeiting holographic laser-plated medium transparent color film process of the present invention adopts the following process flow:

[0076] Coating the surface of auxiliary material PET film: Apply the coating to the base film to obtain a coating film;

[0077] Molded anti-counterfeiting holographic laser transfer coating: transfer the graphic information to the coating film to obtain the holographic laser coating film;

[0078] Place the film to be coated directly above the evaporation tank in the vacuum evaporation chamber to facilitate evaporation

[0079] The zinc sulfide powder blocks are evenly stacked in a triangle in the vertical direction and placed in an evaporation tank for vacuum heating and evaporation;

[0080] Replace the mixed copper sulfide powder block and repeat the evaporation medium;

[0081] The evaporated film is taken out after cooling and releasing the pressure, and then transferred to the printing substrate.

[0082] The invention has the characteristics of simple manufacturing process, low cost, concise and good visual effect, clear molded graphic information, great difficulty in imitation, and stable environmental protection performance of the coating.

[0083] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A process for anti-counterfeiting holographic laser-plated medium transparent color film, characterized in that: The steps include: Step S1, applying the coating to the base film to obtain a coating film; Step S2, transferring the graphic information onto the coating film to obtain a holographic laser coating film; Step S3, vapor-depositing the holographic laser film to be coated in a vapor-depositing machine to obtain a laser medium transparent color film.

2. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 1, characterized in that: The coating use method comprises the following steps: Step S11, placing the coating in a material tank, maintaining the placement temperature of the coating, and controlling the viscosity; Step S12: applying the coating onto the base film by means of a coating device.

3. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 2, characterized in that: In the step S11: The coating comprises 45-55 parts of acrylic resin, 12-17 parts of ethanol, 10-18 parts of water-based wax emulsion, 2-7 parts of diethylene glycol, 1-5 parts of wetting agent, 0.1-2 parts of defoaming agent and 10-25 parts of water; The placement temperature of the coating is any temperature between 19°C and 25°C; Control the coating viscosity to any viscosity between 13s-28s; The method for controlling the viscosity of the coating is: adding a solvent dropwise into the coating, wherein the solvent comprises at least one of alcohol, ethyl acetate and n-propyl acetate.

4. The anti-counterfeiting holographic laser plated medium transparent color film coating according to claim 2, characterized in that: The coating equipment includes an unwinder, a coating roller, an oven, a cooling roller and a winder; The step S12 specifically includes: placing the base film on the unwinder, and passing through the coating roller, the oven and the cooling roller in sequence, and connecting with the coating winder; wherein: The angle between the coating area and the base film is 15°-45° and the pressure is 1kgf / cm 2 -5kgf / cm 2 The coating is applied to the base film on the outer wall of the coating roller using a scraper.

5. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 1, characterized in that: Step S2: The equipment for obtaining the holographic laser film to be coated includes a film pressing unwinder, a film pressing roller, a rubber pressing roller and a film pressing winder; The film pressing plate roller comprises a film pressing holographic laser working plate and a plate roller, wherein the film pressing holographic laser working plate is arranged on the outer periphery of the plate roller; The step S2 specifically includes: placing the coated film on a film pressing unwinder, transferring the graphic information on the film pressing holographic laser working plate to the coating surface of the coated film through the film pressing roller, and obtaining a holographic laser film to be plated.

6. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 5, characterized in that: The plate roller comprises a plate roller tube wall, a hot liquid channel is arranged in the plate roller tube wall, and the hot liquid temperature is 160-180°C.

7. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 1, characterized in that: The evaporation machine in step S3 is a vacuum evaporation machine; The vacuum evaporation machine comprises a vacuum chamber and an evaporation tank, a baffle, a film unwinder to be coated, a guide roller, a main drum, a winding shaft and a cooling system arranged therein; The evaporation tank is arranged below the baffle, and the unwinding machine for coating, the guide roller, the main drum and the winding shaft are arranged above the baffle.

8. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 7, characterized in that: A quartz tube and a molybdenum boat are arranged in the evaporation tank. The quartz tube is arranged at the bottom of the evaporation tank, and the molybdenum boat is arranged above the quartz tube. The molybdenum boat is parallel to the quartz tube and is connected to the positive and negative electrode seats in the evaporation tank.

9. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 7, characterized in that: The step S3 comprises the following steps: Step S31, placing the holographic laser film to be coated above the evaporation tank in the vacuum chamber; Step S32, stacking at least one zinc sulfide metal powder block in a triangle shape and evenly arranging the blocks in a vertical direction in an evaporation tank for evaporation deposition; Step S33, replacing the specially prepared mixed copper sulfide powder block and performing vapor deposition again to obtain a laser medium transparent color film.

10. The process for producing an anti-counterfeiting holographic laser-plated medium transparent color film according to claim 9, characterized in that: In step S32, the vacuum chamber is evacuated to 9.8×10 -2 Pa, the temperature in the evaporation tank rises to about 1100° C., and evaporation is started at a speed of 500 m / min; in the step S33, the specially prepared mixed copper sulfide powder block is a powder block with a ratio of zinc sulfide to copper sulfide of 3:1.

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