A production process of platinum embossed laser paper and laser paper

Abstract

The present invention discloses a production process of platinum embossed laser paper and laser paper, comprising the following steps: S1, making a molded plate with embossed information patterns; S2, making a transfer film; S3, aluminum-plating the information layer surface of the transfer film by an aluminum plating machine; S4, coating a water-based protective film on the surface of the aluminum-plated layer by a coating roller; S5, coating glue on the surface of the second coating layer by a coating roller; S6, pasting and compounding the transfer film and the base paper through the glue layer; S7, peeling off the transfer film to peel off the information layer and the aluminum-plated layer; S8, peeling off the surface coating film, and coating a layer of transparent aqueous solvent on the surface of the aluminum-plated layer by a coating roller; S9, completing the production of platinum embossed laser paper. The present invention improves the bonding force between the base film and the information layer by setting a first coating layer, so that when the base film is peeled off, the aluminum-plated layer can be separated from the information layer, and the embossed pattern information in the information layer can be transferred to the surface of the aluminum-plated layer, which effectively reduces the thickness of the laser paper, and the base film with the information layer can be reused, which greatly reduces the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of laser paper, and more specifically, to a production process of platinum embossed laser paper and the laser paper. Background Art

[0002] Platinum embossed laser paper is a laser paper with a metal three-dimensional embossed effect on the surface of the paper. It is often used in anti-counterfeiting packaging of high-end products such as cigarettes and alcohol. The platinum embossed pattern has deeper texture than conventional flat effect patterns. When manufacturing existing platinum embossed laser paper, UV glue is coated on the surface of the base film, and a molded roller engraved with a platinum embossed pattern is cured on the surface of the UV glue by UV embossing, thereby forming a UV information layer with embossed pattern information on the surface of the base film. The UV information layer is a UV glue layer with pattern information. Since the base film needs to be peeled off after the laser paper is made, the texture depth of the platinum embossed pattern must be less than that of the UV glue layer, resulting in the thickness of the existing platinum embossed laser paper being much greater than that of ordinary laser paper, which not only increases the production cost, but also affects the tensile and bending properties of the platinum embossed laser paper due to the increase in thickness, which is not conducive to the production of packaging. Therefore, it is urgently needed to improve this. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a production process of platinum embossed laser paper and laser paper. By setting a first coating layer, the bonding force between the base film and the information layer is improved, so that when the base film is peeled off, the aluminum-plated layer and the information layer can be separated, and the embossed pattern information in the information layer is transferred to the surface of the aluminum-plated layer, effectively reducing the thickness of the laser paper.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] The invention discloses a production process of platinum embossed laser paper, comprising the following steps:

[0006] S1, making a molded plate with an embossed information pattern;

[0007] S2. Transfer film production:

[0008] a. coating with a coating roller to form a first coating layer on the surface of the base film, wherein the first coating layer is water-based polyurethane;

[0009] b. Coating UV glue on the surface of the first coating layer, and UV molding and UV light curing the UV glue through a molding plate to form an information layer with embossed pattern information;

[0010] c. Rewinding to complete the transfer film production;

[0011] S3, placing the transfer film into an aluminizing machine, and using the aluminizing machine to plate aluminum on the surface of the information layer of the transfer film to form an aluminum-plated layer;

[0012] S4, coating the surface of the aluminum-plated layer with a water-based protective film by a coating roller, and drying and curing the film to form a second coating layer;

[0013] S5, applying glue on the surface of the second coating layer by a coating roller to form a glue layer;

[0014] S6, compounding, bonding the transfer film and the base paper through the glue layer to form a laser paper with a transfer film;

[0015] S7, peeling, peeling the transfer film, so that the information layer and the aluminum coating layer are peeled off, and the relief pattern information of the information layer is transferred to the surface of the aluminum coating layer;

[0016] S8, peeling off the top coating, applying a layer of transparent aqueous solvent on the surface of the aluminum-plated layer by a coating roller, and curing the solvent to form a transparent protective layer on the surface of the aluminum-plated layer;

[0017] S9. Complete the production of platinum embossed laser paper.

[0018] Furthermore, in step S2, before the first coating layer is coated on the surface of the base film, the surface of the base film needs to be corona treated at a corona speed of 150m / min-250m / min and a current of 6-8A, so that the surface tension of the base film after corona treatment reaches 48 dynes-52 dynes.

[0019] Furthermore, the first coating layer is transparent water-based polyurethane with a thickness of 0.6 micrometers to 1.0 micrometers and a solid content of 10% to 20%.

[0020] Furthermore, in step S2, the thickness of the information layer is 6 micrometers to 12 micrometers.

[0021] Furthermore, in step S2, UV light curing is performed by irradiating three groups of mercury lamps with a lamp power of 16KW and an irradiation time of 1 second to 2 seconds.

[0022] Further, in step S4, the second coating layer is water-based acrylic resin with a thickness of 0.6 micrometers to 1.0 micrometers, and in step S8, the protective layer is water-based acrylic resin with a thickness of 0.8 micrometers to 1.6 micrometers.

[0023] Furthermore, the base film is a PET film with a thickness of 20 microns to 25 microns.

[0024] Furthermore, the transfer film can be reused 3-5 times, and the information layer surface after the transfer film is peeled off in step S7 still retains the embossed pattern information. The transfer film peeled off in step S7 can be aluminum-plated again on the information layer surface to form an aluminum-plated layer on the information layer surface.

[0025] The invention discloses a platinum embossed laser paper, which is made by adopting a production process of the platinum embossed laser paper.

[0026] Furthermore, it includes a base paper, a surface of one side of the base paper is connected to a glue layer, a surface of the glue layer is connected to a second coating layer, a surface of the second coating layer is connected to an aluminum plating layer, a surface of the aluminum plating layer is provided with embossed pattern information, a surface of the aluminum plating layer is connected to a transparent protective layer, and the protective layer covers the embossed pattern information.

[0027] The beneficial effects of the present invention are:

[0028] 1. The transfer film is a composite film formed by a base film, a first coating layer and an information layer. The information layer surface of the transfer film peeled off in step S7 still retains the embossed pattern information, so that the transfer film can be reused 3-5 times, and the peeled transfer film does not need to be UV-printed again, and only needs to be aluminum-plated again on the information layer surface to form an aluminum-plated layer on the information layer surface again. By increasing the thickness of the base film and improving the performance of the base film, the transfer film can be reused many times, and the peeled transfer film does not need to be UV-printed again, which can reduce the production cost of laser paper, increase the production speed, effectively reduce the gas emission generated by UV embossing curing during the production process of laser paper, has good environmental protection, and can also improve the consistency of the embossed pattern information on the surface of laser paper, thereby improving product quality;

[0029] 2. By increasing the thickness of the base film and reducing the thickness of the information layer, the production cost can be reduced while ensuring the embossing effect, thereby improving the market competitiveness of laser paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of Embodiment 1;

[0031] Figure 2 A structural diagram of the second embodiment;

[0032] Figure 3 This is a partial schematic diagram of the base film of Example 1 after UV embossing under microscopic conditions;

[0033] Figure 4 This is a partial schematic diagram of the base film after aluminum plating in Example 1 under microscopic view;

[0034] Figure 5 This is a partial schematic diagram of Example 1 under microscopic view after a protective layer is coated on the surface of the aluminum-plated layer.

[0035] Figure numerals: 1, base film; 2, first coating layer; 3, information layer; 4, aluminum plating layer; 5, second coating layer; 6, glue layer; 7, backing paper; 8, protective layer; 9, embossed pattern information. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] like Figure 1 , Figure 2 , Figures 3 to 5 As shown, a production process of platinum embossed laser paper includes the following steps:

[0039] S1, making a molded plate with relief pattern information 9;

[0040] S2. Transfer film production:

[0041] a. coating with a coating roller to form a first coating layer 2 on the surface of the base film 1, wherein the first coating layer 2 is water-based polyurethane;

[0042] b. UV glue is coated on the surface of the first coating layer 2, and the UV glue is UV molded and UV light cured through a mold plate to form an information layer 3 with embossed pattern information 9. The UV light curing is performed by irradiating three groups of mercury lamps with a lamp power of 16KW, and the irradiation time is 1 second to 2 seconds, preferably 1.5 seconds;

[0043] c. Rewinding to complete the transfer film production;

[0044] like Figure 3 As shown, specifically, the base film 1 is a PET film with a thickness of 20 microns to 25 microns, preferably 23 microns. Since the base film 1 needs to be peeled off and discarded in the end and only serves the purpose of transfer, the thickness of the base film 1 in the prior art is mostly selected to be 15 microns. This embodiment increases the thickness of the base film 1, which not only improves the strength of the base film 1 and makes its tension better, but also allows the embossed pattern information 9 to penetrate deep into the base film 1 during UV molding, so that the texture of the embossed information pattern 9 can be deeper and the embossing effect can be better.

[0045] Before coating the first coating layer 2 on the surface of the base film 1, the surface of the base film 1 needs to be corona treated, with a corona speed of 150m / min-250m / min, preferably 200m / min, a current of 6-8A, and preferably 7A, so that the surface tension of the base film 1 after corona treatment reaches 48 dynes-52 dynes. By corona treating the base film 1, the surface tension of the base film 1 can be effectively increased, thereby improving the performance of the base film 1.

[0046] The first coating layer 2 is a transparent water-based polyurethane with a thickness of 0.6 microns to 1.0 microns, preferably 0.8 microns, a solid content of 10% to 20%, and preferably 15%. By coating the surface of the base film 1 with water-based polyurethane, the base film 1 can be more firmly combined with the information layer 3 in step b, preventing the base film 1 and the information layer 3 from peeling off. Since the thickness of the first coating layer 2 is only 0.6 microns to 1.0 microns, it has little effect on the overall thickness of the product.

[0047] The thickness of the information layer 3 is 6 microns to 12 microns, preferably 8 microns. The embossed pattern information 9 penetrates deeply into the base film 1. The information layer 3 is a UV adhesive layer having the embossed pattern information 9. In the prior art, during UV molding, the depth of the embossed pattern information 9 must be less than the thickness of the information layer 3. The information cannot penetrate deeply into the base film 1, and the information layer 3 and the base film 1 need to be peeled off at the end, resulting in the thickness of the information layer 3 being very thick, thereby affecting the overall performance of the laser paper. In this embodiment, by increasing the thickness of the base film 1 and reducing the thickness of the information layer 3, the production cost can be reduced while ensuring the embossing effect, thereby improving the market competitiveness of the laser paper.

[0048] S3, placing the transfer film into an aluminum plating machine, and aluminum is plated on the surface of the information layer 3 of the transfer film by the aluminum plating machine to form an aluminum plating layer 4;

[0049] S4, coating the surface of the aluminum-plated layer 4 with a water-based protective film by a coating roller, and drying and curing the film to form a second coating layer 5;

[0050] Specifically, the second coating layer 5 is a water-based acrylic resin with a thickness of 0.6 microns to 1.0 microns, preferably 0.8 microns. By providing the second coating layer 5, not only the bonding force between the aluminum-plated layer 4 and the second coating layer 5 is much better than the bonding force between the aluminum-plated layer 4 and the information layer 3, which facilitates the peeling of the aluminum-plated layer 4 and the information layer 3, but also the aluminum-plated layer 4 and the glue layer 6 can be isolated, thereby protecting the aluminum-plated layer 4.

[0051] S5, coating glue on the surface of the second coating layer 5 by a coating roller to form a glue layer 6;

[0052] S6, compounding, bonding the transfer film and the base paper 7 through the glue layer 6 to form a laser paper with a transfer film;

[0053] S7, peeling, peeling the transfer film, so that the information layer 3 and the aluminum-plated layer 4 are peeled off, and the relief pattern information 9 of the information layer 3 is transferred to the surface of the aluminum-plated layer 4;

[0054] In this embodiment, the transfer film is a composite film formed by a base film 1, a first coating layer 2 and an information layer 3. In step S7, the information layer 3 of the transfer film is peeled off and the embossed pattern information 9 is still retained on the surface, so that the transfer film can be reused 3-5 times, and the peeled transfer film does not need to be UV embossed again, and only needs to be aluminum-plated on the surface of the information layer 3 again to form an aluminum-plated layer 4 on the surface of the information layer 3 again. By increasing the thickness of the base film 1 and improving the performance of the base film 1, the transfer film can be reused many times, and the peeled transfer film does not need to be UV embossed again, which can reduce the production cost of laser paper, increase the production speed, and effectively reduce the gas emissions generated by UV embossing and curing during the production process of laser paper. It has good environmental protection properties and can also improve the consistency of the embossed pattern information 9 on the surface of laser paper and improve product quality.

[0055] S8, peeling off the top coating, coating the surface of the aluminum-plated layer 4 with a layer of transparent aqueous solvent by a coating roller, and curing it to form a transparent protective layer 8 on the surface of the aluminum-plated layer 4, such as Figure 4 As shown, the protective layer 8 is a transparent water-based acrylic resin with a thickness of 0.8 micrometers to 1.6 micrometers, preferably 1.0 micrometers. By coating the protective layer 8 on the surface of the aluminum-plated layer 4, the aluminum-plated layer 4 and the embossed pattern information 9 of the aluminum-plated layer 4 can be protected;

[0056] S9. Complete the production of platinum embossed laser paper.

[0057] Embodiment 2:

[0058] like Figure 3 As shown, a platinum embossed laser paper is made by the production process of Example 1, including a base paper 7, a glue layer 6 is connected to the surface of one side of the base paper 7, a second coating layer 5 is connected to the surface of the glue layer 6, an aluminum plating layer 4 is connected to the surface of the second coating layer 5, an embossed pattern information 9 is provided on the surface of the aluminum plating layer 4, a transparent protective layer 8 is connected to the surface of the aluminum plating layer 4, and the protective layer 8 covers the embossed pattern information 9.

[0059] The platinum embossed laser paper made by the process of Example 1 not only has a greatly reduced thickness, thereby reducing production costs, but also can protect the embossed pattern information 9 and the aluminum-plated layer 4 through the protective layer 8 and the second coating layer 5, thereby improving product performance and greatly improving market competitiveness.

[0060] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A production process for platinum embossed laser paper, characterized in that: The following steps are involved: S1, making a mold plate with relief pattern information (9); S2. Transfer film production: a. coating with a coating roller to form a first coating layer (2) on the surface of the base film (1), wherein the first coating layer (2) is water-based polyurethane; b. coating UV glue on the surface of the first coating layer (2), and UV molding the UV glue through a molding plate and curing it with UV light to form an information layer (3) having embossed pattern information (9), wherein the embossed pattern information (9) penetrates deeply into the base film (1); c. Rewinding to complete the transfer film production; S3, placing the transfer film into an aluminum plating machine, and using the aluminum plating machine to plate aluminum on the surface of the information layer (3) of the transfer film to form an aluminum plating layer (4); S4, coating the surface of the aluminum-plated layer (4) with a water-based protective film by a coating roller, and drying and curing the film to form a second coating layer (5); S5, coating the surface of the second coating layer (5) with glue by a coating roller to form a glue layer (6); S6, compounding, bonding the transfer film and the base paper (7) through the glue layer (6) to form a laser paper with a transfer film; S7, peeling off, peeling off the transfer film, so that the information layer (3) and the aluminum-plated layer (4) are peeled off, and the relief pattern information (9) of the information layer (3) is transferred to the surface of the aluminum-plated layer (4); S8, peeling off the top coating, applying a layer of transparent aqueous solvent on the surface of the aluminum-plated layer (4) by means of a coating roller, and curing the solvent to form a transparent protective layer (8) on the surface of the aluminum-plated layer (4); S9, complete the production of platinum embossed laser paper; The transfer film can be reused 3-5 times. The surface of the information layer (3) after the transfer film is peeled off in step S7 still retains the embossed pattern information (9). The transfer film peeled off in step S7 can be aluminum-plated again on the surface of the information layer (3) to form an aluminum-plated layer (4) on the surface of the information layer (3).

2. The production process of platinum embossed laser paper according to claim 1, characterized in that: In step S2, before the first coating layer (2) is coated on the surface of the base film (1), the surface of the base film (1) needs to be corona-treated at a speed of 150 m / min-250 m / min and a current of 6-8 A, so that the surface tension of the base film (1) after corona treatment reaches 48 dynes-52 dynes.

3. The production process of platinum embossed laser paper according to claim 1, characterized in that: The first coating layer (2) is a transparent water-based polyurethane with a thickness of 0.6 micrometer to 1.0 micrometer and a solid content of 10% to 20%.

4. The production process of platinum embossed laser paper according to claim 1, characterized in that: In step S2, the thickness of the information layer (3) is 6 micrometers to 12 micrometers.

5. The production process of platinum embossed laser paper according to claim 1, characterized in that: In step S2, UV light curing is performed by irradiating three groups of mercury lamps with a lamp power of 16KW and an irradiation time of 1 second to 2 seconds.

6. The production process of platinum embossed laser paper according to claim 1, characterized in that: In step S4, the second coating layer (5) is a water-based acrylic resin with a thickness of 0.6 micrometers to 1.0 micrometers. In step S8, the protective layer (8) is a water-based acrylic resin with a thickness of 0.8 micrometers to 1.6 micrometers.

7. The production process of platinum embossed laser paper according to claim 1, characterized in that: The base film (1) is a PET film with a thickness of 20 micrometers to 25 micrometers.

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