A three-dimensional dynamic paper

Abstract

The utility model relates to a kind of three-dimensional dynamic paper, belong to packaging material technical field.The three-dimensional dynamic paper specifically includes back coating, raw paper layer, three-dimensional effect layer, medium layer or metal plating, protective layer, coating structure is arranged from bottom to top in turn.Three-dimensional effect layer is formed using custom pattern plate roll superposition mould pressing, and different levels of pattern or character is transferred to base material by mould pressing, since there is depth difference in each mould pressing, therefore the groove of different depth can be obtained, using grating effect, under different angle and light condition, pattern, character etc. on paper can be seen to change, finally, three-dimensional dynamic effect is presented on vision.The utility model three-dimensional dynamic paper, can simultaneously possess laser feature and three-dimensional dynamic effect, meet the dual requirements of anti-fake and beautiful, meet the market demand of novel high-end packaging industry, decorative material.

Description

Technical Field

[0001] This utility model relates to the field of high-end packaging paper products such as tobacco, alcohol, cosmetics, and gifts, and specifically relates to the interlayer structure of a three-dimensional dynamic paper, belonging to the technical field of packaging paper structure. Background Technology

[0002] With the improvement of living standards, people have higher requirements for product packaging and decoration, demanding not only a high-end and aesthetically pleasing appearance but also anti-counterfeiting features. 3D dynamic paper has emerged as a new type of anti-counterfeiting material. Its unique surface texture and optical effects create a three-dimensional and dynamic effect. The paper's color, pattern, or text changes when viewed from different angles and under different lighting conditions, increasing product recognizability and anti-counterfeiting capabilities. Furthermore, it offers a high degree of customization and personalization. Custom-made anti-counterfeiting dynamic paper can be created according to customer needs and requirements.

[0003] Traditional 3D motion paper uses multiple laser holographic layers and multiple metal coatings arranged alternately and compositely to transfer information with dynamic effects onto the paper. Since multiple laser holographic layers can be superimposed with various laser effects, users can observe different laser pattern information from different angles, increasing the diversity of laser pattern information. They can also work together to produce a dazzling effect. The problems with this process are as follows: (1) The process is complex. The realization of the 3D motion effect involves multiple laser holographic layers and multiple metal coatings arranged alternately, which involves many steps and increases costs. (2) The production process is relatively complex and requires the use of thin films, which not only increases production costs but also makes the films non-recyclable, difficult to degrade, and environmentally unfriendly. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a three-dimensional dynamic paper that not only solves the problems of complex processes and increased costs associated with existing technologies, but also avoids the environmental pollution caused by composite transfer processes.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A type of three-dimensional dynamic paper is characterized by its layer structure, which, from bottom to top, includes: a back coating layer, a base paper layer, a three-dimensional effect layer, a media layer or a metal plating layer, and a protective layer.

[0006] Furthermore, the base paper layer is selected with a surface smoothness ≥3000S and a basis weight range of 30-340g / m³. 2 Paper-based materials.

[0007] Furthermore, the three-dimensional effect layer is formed by at least two molding processes using different custom pattern rollers.

[0008] Furthermore, the number of molding cycles for the three-dimensional effect layer is determined based on the desired effect of the product; the molding method is either cold molding or hot molding; the molding depth decreases sequentially to ensure a suitable depth difference between the molded layers.

[0009] Furthermore, the three-dimensional effect layer formed by two molding processes includes a graphic area formed by the first molding, a non-graphic area formed by the first molding, a non-graphic area formed by the second molding, a graphic area formed by the second molding, and an overlapping area formed by the first and second molding processes.

[0010] Furthermore, the primary embossed graphic area refers to a layer of raised and recessed graphic information embossed on the surface of the base paper layer with a certain depth. The embossing method is cold embossing, the printing roller is a customized raised and recessed printing roller, the curing method is electron beam radiation curing, the radiation curing power is 2.0-4.0KGY, the embossing depth is 8-10μm, the embossing temperature is room temperature, and the embossing pressure is 230-250N. During the curing process, laser information is imprinted onto the coating surface to form a deep laser effect.

[0011] Furthermore, the non-graphic area of ​​the first molding is a coating that is only applied to the surface of the original paper layer after the first molding and has no molding relationship with it. The coating is one or more of polyacrylic electron beam curing coatings, with a solid content of 100% and a viscosity of 25s (T4 cup, 25℃). The coating method is roller coating.

[0012] Furthermore, the secondary molding graphic area refers to the second layer of graphic information, which is molded onto the surface of the first layer of graphic information and has a certain depth. The molding method is hot pressing, the molding roller is a customized nickel roller, the molding temperature is 130-150℃, the molding pressure is 230-240N, and the molding depth is 0.5-4μm. The appropriate molding depth can be selected according to the number of molding cycles, and the required molding depth decreases sequentially to ensure that there is a suitable depth difference in the molding.

[0013] Furthermore, the non-graphic area of ​​the secondary molding refers to the coating that is only applied to one surface of the raised and recessed graphic information layer after secondary molding and has no molding relationship with it. The coating is selected from one or more of polyacrylic electron beam curing coatings, with a solid content of 100% and a viscosity of 25s (T4 cup, 25℃), and the coating method is roller coating.

[0014] Furthermore, the overlapping area of ​​the first and second molding processes is the region where the raised and recessed graphic information layers one and two of the two molding processes overlap, with a depth difference between the two molding processes. Because the second molding process is shallower, it cannot completely destroy the grooves of the first molding process. Therefore, the patterns from both molding processes exist in the overlapping area, and the molding depths are different. According to the grating effect, depending on the angle and incident position of light, reflected light will scatter in different directions. Therefore, under different angles and lighting conditions, the patterns and text on the paper will exhibit multi-layered three-dimensional and dynamic effects, forming changes in light and shadow.

[0015] Furthermore, the dielectric layer in the dielectric layer or metal plating is a transparent zinc sulfide dielectric layer, and the metal plating is an aluminum plating layer with a thickness of 30-50 nm. Its main function is to protect the laser information of the 3D effect layer, preventing the protective layer from covering and extincting the laser information, while also enhancing reflection, which is beneficial for clearly displaying the laser pattern information.

[0016] Furthermore, the protective layer can be selected from three types: varnish, color paste, or ink. The varnish is selected from polyacrylate systems, and the color paste or ink is selected from water-based systems.

[0017] Furthermore, the back coating is a polyvinyl alcohol-based coating or water, with a wet coating weight of 5-6 g / m². 2 .

[0018] The advantages of this three-dimensional dynamic paper compared with traditional products are mainly reflected in the following aspects: 1. It possesses both laser diffraction and three-dimensional dynamic effects, meeting the dual requirements of anti-counterfeiting and aesthetics, and conforming to the needs of the new high-end packaging industry and decorative materials market.

[0019] 2. Highly customizable and personalized. Custom-made 3D tactile anti-counterfeiting paper can be created based on customer needs and requirements. This feature makes the tactile anti-counterfeiting paper suitable for different industries and products, meeting the needs of various brands and markets, and has a wide range of applications.

[0020] 3. The coating is a polyacrylic electron beam curing coating with 100% solids content. The entire production process is solvent-free, meeting environmental protection requirements. Furthermore, the curing method is electron beam curing technology. Because electron beams can penetrate thick paper, this overcomes the limitations of traditional UV curing technology, which cannot penetrate paper and can only cure on one side, achieving double-sided curing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 in this application; Figure 2 This is a schematic diagram of the structure of Embodiment 2 in this application; In the diagram: 1. Base paper layer; 2. 3D effect layer; 21a. First molding graphic area; 21b. First molding non-graphic area; 22a. Second molding graphic area; 22b. Second molding non-graphic area; 23. First and second molding overlapping area; 24a. Third molding graphic area; 24b. Third molding non-graphic area; 25. Second and third molding overlapping area; 31. Medium layer; 32. Metal plating layer; 4. Protective layer; 5. Back coating layer. Detailed Implementation

[0022] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the present invention.

[0023] Example 1 A three-dimensional dynamic paper, the layer structure of which includes, from bottom to top, the following: back coating layer 5, base paper layer 1, three-dimensional effect layer 2, medium layer 31, and protective layer 4.

[0024] The base paper layer 1 uses 56g / m² paper. 2The coating layer 2 is made of Minfeng paper. The three-dimensional effect layer 2 is formed by two overlapping molding processes using different custom-designed pattern rollers, including a first-molded graphic area 21a, a first-molded non-graphic area 21b, a second-molded graphic area 22a, a second-molded non-graphic area 22b, and a first and second-molded overlapping area 23. The first molding process is cold molding, using custom-designed embossed rollers, with electron beam radiation curing at a power of 2.0 kgy, a molding depth of 10 μm, a molding temperature of room temperature, and a molding pressure of 250 N. The second molding process is hot molding, using custom-designed nickel rollers, with a molding temperature of 140°C, a molding pressure of 240 N, and a molding depth of 1.5 μm. Because the first molding depth is deeper and the second molding depth is shallower, the second molding cannot fill the grooves left by the first molding. Therefore, in the overlapping area 23 of the first and second molding, patterns from both moldings exist, but with different molding depths. According to the grating effect, different angles and incident positions of light cause reflected light to scatter in different directions. Therefore, under different angles and lighting conditions, the patterns and text on the paper will exhibit multi-layered three-dimensional and dynamic effects, creating changes in light and shadow. The dielectric layer 31 is a transparent zinc sulfide dielectric layer with a thickness of 35 nm. The protective layer 4 is a varnish with a wet coating weight of 5 g / m³. 2 .

[0025] The preparation method of the 3D dynamic paper in this embodiment is as follows: 1. Coating + Molding: at a basis weight of 56 g / m 2 Minfeng paper is coated with an acrylic electron beam curing coating with a wet weight of 15 g / m². 2 To achieve the desired effect, a custom-designed pattern roller is used in conjunction with the coating process for double-layer molding. The first molding is a cold molding process using a custom-designed traditional embossed roller. Electron beam curing is employed, with a molding depth of 10μm, a molding temperature of room temperature, a molding pressure of 250N, and an electron beam radiation curing power of 2.0KGY. During the curing process, laser information is imprinted onto the coating surface, creating a deep laser effect. The second molding is a hot pressing process with a molding depth of 1.5μm, a molding temperature of 140℃, and a molding pressure of 240N. In this process, the roller is heated to a specific temperature and pressed under a certain pressure. After a short period of pressure holding, the material naturally sets, forming light refraction points of varying heights and sizes. Simultaneously, the grooves created in the first molding process are filled, and a shallower laser effect is imprinted onto the surface, resulting in a three-dimensional layer 2. 2. Evaporation: The paper with the three-dimensional effect layer 2 is uniformly vaporized in a vacuum vaporization equipment. The vaporization medium is zinc sulfide with a thickness of 35nm, resulting in a medium layer 31. 3. Topcoat: Apply a polyacrylate-based clear varnish to the medium layer 31, with a wet weight of 5 g / m². 2 , thus obtaining protective layer 4.

[0026] 4. Back coating: Apply a polyvinyl alcohol coating to the back of the paper to ensure that the paper moisture content is between 3.5% and 5%.

[0027] The final product is a packaging paper consisting of, from top to bottom, a protective layer 4, a media layer 31, a 3D effect layer 2, a base paper layer 1, and a back coating layer 5.

[0028] Example 2 A three-dimensional dynamic paper, the layer structure of which includes, from bottom to top, the following: back coating layer 5, base paper layer 1, three-dimensional effect layer 2, metal plating layer 32, and protective layer 4.

[0029] The base paper layer 1 is made of 125g / m² coated white cardboard. The coating layer 2 is made of polyacrylic acid electron beam cured coating. The 3D effect layer 2 is formed by two superimposed molding processes using different customized pattern rollers, including a first-molded graphic area 21a, a first-molded non-graphic area 21b, a second-molded graphic area 22a, a second-molded non-graphic area 22b, a first and second-molded overlapping area 23, a third-molded graphic area 24a, a third-molded non-graphic area 24b, and a second and third-molded overlapping area 25. The first molding process uses cold molding with a custom-made embossing roller. Curing is done via electron beam radiation at a power of 2.5 kgy, achieving a molding depth of 9.5 μm at room temperature and a pressure of 250 N. During curing, laser information is imprinted onto the coating surface, creating a deep laser effect. The second molding process uses hot pressing with a custom-made nickel roller at a temperature of 130°C and a pressure of 240 N, achieving a molding depth of 2.5 μm. The third molding process also uses hot pressing with a custom-made nickel roller at a temperature of 140°C and a pressure of 235 N, achieving a molding depth of 0.8 μm. Due to the shallow depth of the third molding, it cannot completely fill the grooves from the first and second molding processes. Therefore, patterns from both molding processes are present in overlapping areas, with varying molding depths. According to the grating effect, the reflected light will scatter in different directions depending on the angle and incident position of the light. Therefore, under different angles and lighting conditions, the patterns and text on the paper will exhibit multi-layered three-dimensional and dynamic effects, forming changes in light and shadow. The metal plating layer 32 is aluminum with a thickness of 30nm. The protective layer 4 is ink with a coating wet weight of 2.5g / m³. 2 .

[0030] The preparation method of the 3D dynamic paper in this embodiment is as follows: 1. At a weight of 125 g / m 2A polyacrylic electron beam curing coating is applied to coated white cardboard, with a wet weight of 14 g / m². 2 To achieve the desired product effect, a custom-designed pattern roller is used in conjunction with the coating process for three molding cycles. The first molding cycle is a cold molding process using a custom-designed embossed roller. Electron beam curing is employed, with a molding depth of 9.5μm, a room temperature, a molding pressure of 250N, and an electron beam radiation curing power of 2.5KGY. During curing, laser information is imprinted onto the coating surface, creating a deep laser effect. The second molding cycle is a hot pressing process using an electro-engraved nickel roller. The molding depth is 2.5μm, the molding temperature is 130℃, and the molding pressure is 240N. The third... The molding method is hot pressing, the molding depth is 0.8μm, the molding temperature is 140℃, and the molding pressure is 235N. In the hot pressing process, the printing roller is heated to a certain temperature and pressed with a certain pressure. After holding the pressure for a short time, it is naturally shaped to form light refraction points of different heights and sizes. At the same time, the second molding can fill the grooves generated after the first molding, and the third molding can fill the grooves generated after the second molding, imprinting a shallower laser effect onto the surface to obtain a three-dimensional effect layer 2. 2. Evaporation: The paper with the three-dimensional effect layer 2 is uniformly vaporized in a vacuum vaporization equipment. The vaporization medium is aluminum and the thickness is 30nm, to obtain a metal coating layer 32. 3. Topcoat: Apply water-based ink to the metal plating layer 32, with a wet weight of 2.5 g / m². 2 , thus obtaining protective layer 4.

[0031] 4. Back coating: Apply high-purity water to the back of the paper to ensure that the paper moisture content is between 3.5% and 5%.

[0032] The final product is a packaging paper consisting of, from top to bottom, a protective layer 4, a metal plating layer 32, a three-dimensional effect layer 2, a base paper layer 1, and a back coating layer 5.

[0033] This invention relates to a three-dimensional dynamic paper. The three-dimensional effect layer is formed by superimposing and molding customized pattern rollers. The number of molding cycles is determined according to the desired effect of the product. Two molding methods are used: cold molding and hot molding. Through molding, patterns or text of different layers are transferred to the substrate. Due to the depth difference in each molding, grooves of varying depths are obtained. Utilizing the grating effect, the patterns and text on the paper appear to change under different angles and lighting conditions, ultimately presenting a visually dynamic three-dimensional effect. The main function of the dielectric layer or metal plating is to protect the laser information of the three-dimensional effect layer, preventing the protective layer from covering and matting the laser information. It also enhances reflection, which helps to clearly display the laser pattern information. The paper produced by this invention possesses both laser characteristics and a dynamic three-dimensional effect, meeting the dual requirements of anti-counterfeiting and aesthetics, and conforming to the needs of the new high-end packaging industry and decorative materials market.

Claims

1. A three-dimensional dynamic paper, characterized in that, Its layer structure, from bottom to top, includes: a back coating layer, a base paper layer, a 3D effect layer, a dielectric layer or a metal plating layer, and a protective layer. The three-dimensional effect layer is formed by at least two molding processes using different custom pattern rollers, employing either cold molding or hot molding.

2. The three-dimensional dynamic paper as described in claim 1, characterized in that, The molding depth of the three-dimensional effect layers decreases sequentially to ensure that there is a suitable depth difference between the molding layers.

3. The three-dimensional dynamic paper as described in claim 1, characterized in that, The three-dimensional effect layer formed by two molding processes includes a graphic area formed by the first molding, a non-graphic area formed by the first molding, a non-graphic area formed by the second molding, a graphic area formed by the second molding, and an overlapping area formed by the first and second molding processes.

4. The three-dimensional dynamic paper as described in claim 3, characterized in that, The first-stage embossed graphic area refers to a layer of raised and recessed graphic information embossed on the surface of the base paper layer with a certain depth. The embossing method is cold embossing, the printing roller is a customized raised and recessed printing roller, the curing method is electron beam radiation curing, the radiation curing power is 2.0-4.0KGY, the embossing depth is 8-10μm, the embossing temperature is room temperature, and the embossing pressure is 230-250N.

5. The three-dimensional dynamic paper as described in claim 3, characterized in that, The non-graphic area of ​​the first molding is a coating that is only applied to the surface of the base paper layer after the first molding and has no molding relationship with it.

6. The three-dimensional dynamic paper as described in claim 3, characterized in that, The secondary molded graphic area refers to the second graphic information layer with a certain depth, which is molded on the surface of the first graphic information layer. The molding method is hot pressing, the molding roller is a customized nickel roller, the molding temperature is 130-150℃, the molding pressure is 230-240N, and the molding depth is 0.5-4μm.

7. The three-dimensional dynamic paper as described in claim 3, characterized in that, The non-graphic area of ​​the secondary molding refers to the coating that is applied only to one surface of the raised and recessed graphic information layer after secondary molding and has no molding relationship with it.

8. The three-dimensional dynamic paper as described in claim 3, characterized in that, The overlapping area of ​​the first and second molding is the area where the first and second embossed graphic information layers overlap each other in the two molding processes.

9. The three-dimensional dynamic paper as described in claim 4, characterized in that, The dielectric layer or metal coating is a zinc sulfide transparent dielectric layer, and the metal coating is an aluminum coating with a thickness of 30-50 nm.

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