Laser holographic anti-counterfeiting composite film

Abstract

The utility model belongs to the technical field related to anti-counterfeiting packaging materials, and discloses a laser holographic anti-counterfeiting composite film, which includes a PET base film, an imaging resin layer and a transfer resin layer, wherein the imaging resin layer is arranged between the PET base film and the transfer resin layer, and is used to bond the PET base film and the transfer resin layer together, and at the same time provide a laser holographic imaging effect; the transfer resin layer is used to directly contact the molded nickel plate with a concave-convex pattern, and is used to be peeled off together with the imaging resin layer and the PET base film when separated from the molded nickel plate, and at the same time provide a laser holographic imaging effect. Through the utility model, the conventional composite film molding discoloration, plate sticking and other problems can be effectively solved, and the overall molding performance can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to anti-counterfeiting packaging materials, and more specifically, relates to a laser holographic anti-counterfeiting composite film, which can effectively solve the problems of conventional composite film molding discoloration, plate sticking, etc., while greatly improving the overall molding performance. Background Art

[0002] Laser holographic molding technology is a kind of holographic grating technology. It uses the principle of laser holography to quickly copy the imaging object or the material of multi-level printing equipment. The production technology of laser holographic packaging materials is high, the equipment is sophisticated, and the process is complex. The product is very easy to be damaged after processing, so it has high decorative and ornamental value, and thus makes the packaging have a good anti-counterfeiting effect.

[0003] The laser holographic anti-counterfeiting composite film in the prior art is mainly made by coating a layer of imaging resin on the PET composite base film. Since the PET base film needs to be tightly combined with the imaging resin layer, the imaging resin layer is required to have good adhesion performance. However, many actual tests have shown that during actual molding, the imaging resin layer is directly in contact with the nickel plate, and the nickel plate has a concave-convex pattern, which has a certain bonding force with the imaging resin coating, resulting in problems such as the coating and small molecules slowly sticking to the nickel plate during the molding process, the molding discoloration, and the loss of small pieces of coating. In addition, the plate needs to be washed if the continuous molding length is ≤6000m. There is currently no effective solution.

[0004] Accordingly, the art is in urgent need of further improvement or enhancement in order to better meet the high quality requirements of modern laser holographic anti-counterfeiting. Utility Model Content

[0005] In view of the above defects or needs of the prior art, the purpose of the utility model is to provide a laser holographic anti-counterfeiting composite film, which makes targeted improvements on the specific structural composition and key performance parameters of the composite film by fully combining the working characteristics and specific needs of the laser holographic anti-counterfeiting packaging, which can effectively solve the problems of discoloration and sticking of conventional composite films during molding, while greatly improving the overall molding performance.

[0006] To achieve the above-mentioned object, according to the utility model, a laser holographic anti-counterfeiting composite film is provided, characterized in that the composite film comprises a PET base film, an imaging resin layer and a transfer resin layer, wherein:

[0007] The imaging resin layer is arranged between the PET base film and the transfer resin layer, and is used to bond the PET base film and the transfer resin layer together from top to bottom, and at the same time provide a laser holographic imaging effect;

[0008] The transfer resin layer is used to directly contact the molded nickel plate with a concave-convex pattern. It is used to be peeled off together with the imaging resin layer and the PET base film when separated from the molded nickel plate, and at the same time provides a laser holographic imaging effect.

[0009] Further preferably, the material dyne value of the PET base film is set to 52±2.

[0010] Further preferably, the solid content of the imaging resin layer is set to 18%±1%.

[0011] Further preferably, the solid content of the transfer resin layer is set to 15.5%±1%.

[0012] Further preferably, the transfer resin layer is prepared by double coating, wherein the dry weight of the first coating is controlled to be 1g / ㎡±0.2g / ㎡, and the total dry weight after the second coating is controlled to be 1.5g / ㎡±0.2g / ㎡, and then dried in an oven for the second time.

[0013] More preferably, the continuous molding performance of the composite film can reach more than 24000 m.

[0014] In general, the above technical solution conceived by the utility model has the following technical advantages compared with the prior art:

[0015] (1) The utility model fully combines the working characteristics and specific needs of laser holographic anti-counterfeiting packaging, and makes targeted improvements to the specific structural composition and key performance parameters of the composite film, which can effectively solve the problems of conventional composite film molding discoloration and plate sticking, and greatly improve the overall molding performance;

[0016] (2) More specifically, since the imaging resin layer and the transfer resin layer are coated on the PET base film respectively by a double coating process, the imaging resin layer as a primer layer can effectively bond the PET base film and the transfer resin film together firmly, while the transfer resin layer is in direct contact with the nickel plate during molding and can be smoothly separated from the nickel plate, thereby avoiding the problems of discoloration and plate sticking caused by direct molding with a single imaging resin layer;

[0017] (3) The new composite film obtained by the utility model has both the fastness characteristics of the composite film and the pressure resistance characteristics of the transfer film, and the molding performance is greatly improved. The continuous molding performance can reach more than 24,000 m, so it has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure when the laser holographic anti-counterfeiting composite film and the molded nickel plate are integrated according to the utility model;

[0019] Figure 2It is a process flow chart for demonstratively showing the process for preparing the laser holographic anti-counterfeiting composite film according to the utility model;

[0020] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0021] 1-PET base film; 2-imaging resin layer; 3-transfer resin layer; 4-molded nickel plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Figure 1 This is a schematic diagram of the overall structure of the laser holographic anti-counterfeiting composite film and the molded nickel plate according to the utility model. Figure 1 As shown, the laser holographic anti-counterfeiting composite film according to the utility model mainly includes functional components such as a PET base film 1, an imaging resin layer 2 and a transfer resin layer 3, which will be specifically described one by one below.

[0024] The PET base film 1 is used as the main carrier of the composite film and can be made of various conventional materials on the market. In addition, its material dyne value can be preferably set to about 52±2.

[0025] As for the imaging resin layer 2, it is arranged between the PET base film 1 and the transfer resin layer 3, and is used to bond the PET base film 1 and the transfer resin layer 3 together from top to bottom, while providing a laser holographic imaging effect.

[0026] More specifically, the imaging resin layer 2 can be made of various conventional materials on the market, and can be applied as a first coating layer onto the PET base film 1 by double coating.

[0027] According to a preferred embodiment of the present invention, the solid content of the imaging resin layer 2 is preferably set to 18%±1%.

[0028] As for the transfer resin layer 3, it is used to directly contact with the molded nickel plate 4 with a concave-convex pattern. It is used to be peeled off together with the imaging resin layer 2 and the PET base film 1 when separated from the molded nickel plate 4, and at the same time provide a laser holographic imaging effect.

[0029] More specifically, the transfer resin layer 3 can provide good peeling performance after the molding operation and will not produce adhesion when separated from the nickel plate. Compared with direct molding with a single imaging resin layer, it is not molded in direct contact with the nickel plate, thereby effectively solving the problems of composite film molding fading, plate sticking, etc., and greatly improving the molding efficiency.

[0030] According to a preferred embodiment of the present invention, the solid content of the transfer resin layer 3 is set to 15.5%±1%.

[0031] According to another preferred embodiment of the utility model, the transfer resin layer 3 is prepared by two coatings, wherein the dry weight of the first coating is controlled to be 1g / ㎡±0.2g / ㎡, and the total dry weight after the second coating is controlled to be 1.5g / ㎡±0.2g / ㎡, and then dried in an oven for the second time.

[0032] In summary, the new composite film according to the utility model has a compact structure and is easy to process and manufacture. At the same time, it has the fastness characteristics of the composite film and the pressure resistance characteristics of the transfer film. The molding performance is greatly improved, and the continuous molding performance can reach more than 24,000 m, so it has broad application prospects.

[0033] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser holographic anti-counterfeiting composite film, characterized in that: The composite film comprises a PET base film (1), an imaging resin layer (2) and a transfer resin layer (3), wherein: The imaging resin layer (2) is arranged between the PET base film (1) and the transfer resin layer (3), and is used to bond the PET base film (1) and the transfer resin layer (3) together from top to bottom, while providing a laser holographic imaging effect; The transfer resin layer (3) is used to directly contact the molded nickel plate (4) with a concave-convex pattern. It is used to be peeled off together with the imaging resin layer (2) and the PET base film (1) when separated from the molded nickel plate (4), while providing a laser holographic imaging effect.

2. The laser holographic anti-counterfeiting composite film according to claim 1, characterized in that: The material dyne value of the PET base film (1) is set to 52±2.

3. A laser holographic anti-counterfeiting composite film as claimed in claim 2, characterized in that: The solid content of the imaging resin layer (2) is set to 18%±1%.

4. The laser holographic anti-counterfeiting composite film according to claim 3, characterized in that: The solid content of the transfer resin layer (3) is set to 15.5%±1%.

5. The laser holographic anti-counterfeiting composite film according to claim 4, characterized in that: The continuous molding performance of the composite film can reach more than 24000m.

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