A new type of anti-counterfeiting straight plating paper

Abstract

The utility model relates to a novel anti -fake direct plating paper, including the paper layer of original from bottom to top in proper order arrange, primer layer, printing layer, dielectric layer and surface coating. Primer layer is the low surface tension coating that presents the matt effect, printing layer is the high surface tension coating that presents the high -light effect, through the surface tension difference between primer layer and printing layer and the cohesive reaction of printing layer, realize the three -dimensional convex effect of ink, through the brightness difference after plating aluminum, set up different bright dull interval, make form the mirror surface high -light sense and matt sense on the same printed matter, realize the high contrast of local graph and text on the vision, reach the cold and burnished effect. The utility model provides a kind of high-quality positioning anti -fake product with clear graph and text, possesses two effects of three -dimensional convex and cold and burnished, satisfies the dual requirements of anti -fake, beautiful, meets the market demand of novel high -end packaging industry, decorative material.

Description

Technical Field

[0001] This utility model relates to the interlayer structure of a novel anti-counterfeiting direct-coated paper, belonging to the technical field of high-end packaging paper products such as tobacco, alcohol, cosmetics, and gifts. Background Technology

[0002] With the booming development of the national economy and the flourishing of the printing and packaging industry, the requirements for the appearance of printed products are becoming increasingly stringent. In the post-printing processing of printed products, 3D cold foil stamping is highly sought after due to its stunning surface finishing effect. Cold foil stamping is a special printing processing technique applied to materials such as paper, textiles, and plastics to create unique patterns and effects. However, despite its unique advantages, 3D cold foil stamping also presents some challenges: First, in terms of cost, compared to traditional flat printing processes, 3D cold foil stamping requires more specialized equipment and high-quality materials, such as films, resulting in higher costs. This cost is particularly significant in large-scale production or when complex 3D effects are required. Second, in terms of technical requirements, 3D cold foil stamping requires a high level of professional skills and experience for operation and control. Every step from design to processing requires precise operation and skilled techniques to ensure optimal results. Furthermore, start-up speed is also a concern. Cold foil stamping requires the use of special cold foil adhesives or films, which typically require a considerable amount of time to preheat, melt, or reach optimal working temperature. This process can take some time to ensure that the cold foil material adheres perfectly and cures on the paper or other materials. At the same time, cold ironing equipment and machines also need to be adjusted and calibrated to ensure uniform application and tight pressing of cold ironing adhesive or cold ironing film.

[0003] In view of the above, it is of positive and important significance to provide a new type of anti-counterfeiting direct-coating paper that is simple in process, low in cost and has good environmental performance. Summary of the Invention

[0004] The present invention aims to provide a novel anti-counterfeiting direct-coating paper that can achieve a cold foil stamping effect. The process of the novel anti-counterfeiting direct-coating paper is simple and fast and has good environmental performance.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: A new type of anti-counterfeiting direct-coated paper is characterized by its structural layers, which, from bottom to top, consist of a base paper layer, a base coating layer, a printing layer, a media layer, and a top coating layer. The base coating is an electron beam cured coating with a surface tension of 32-34 dynes / cm; The printed layer uses an electron beam-cured ink layer with a surface tension of 36-42 dynes / cm.

[0006] Preferably, the base paper layer is a paper-based material with a basis weight range of 30-340 g / m³. 2 .

[0007] Preferably, the electron beam curable coating used in the base layer is a mixture of prepolymer, reactive diluent, matting agent or silver paste; the coating viscosity is 18-20s and the coating thickness is 1µm.

[0008] Preferably, the prepolymer is one or a mixture of several of polyester acrylates, polyether acrylates, epoxy acrylates, and polyurethane acrylates, and the reactive diluent is one or a mixture of several of monofunctional or polyfunctional diluents. The matte effect is adjusted by changing the particle size and ratio of the matte powder or silver paste.

[0009] Preferably, the printing layer uses electron beam cured ink with a viscosity of 18-20s and a coating thickness of 6-7µm. The coating method can be either localized or full-width coating. The printing layer requires ink with good leveling properties, high surface tension, and high surface gloss. Simultaneously, the resin must undergo a cohesive reaction, shrinking to create a three-dimensional, embossed effect. Furthermore, during printing, the printed image and text must be the same size as the printing plate itself, without deformation.

[0010] Preferably, the dielectric layer is an aluminum dielectric layer obtained by vacuum evaporation, with a thickness of 35-45 μm; its function is to enhance the three-dimensional convex effect visually through the brightness difference after aluminum plating.

[0011] Preferably, the topcoat is a type of paint or ink, which is dried by electron beam curing. Its function is to protect the dielectric layer from damage and to enhance the aesthetics of the product.

[0012] The novel anti-counterfeiting direct-coating paper of this utility model has the following advantages: 1. A simpler coating structure is used to obtain paper products capable of achieving cold foil stamping effects. The surface tension difference between the base coating and the printing layer, as well as the cohesive reaction of the printing layer, achieves a three-dimensional raised effect of the ink; by using the brightness difference after aluminum plating, different high-gloss and matte zones are set to achieve high contrast in local graphics and text, thus achieving the cold foil stamping effect.

[0013] 2. It can significantly improve production efficiency and achieve large-scale mass production. The speed of cold ironing is about 80-100m / min, while the coating speed is about 800-1000m / min. If the coating process is used instead of the cold ironing process, the efficiency can be increased by about 10 times.

[0014] 3. Cost-effective and environmentally friendly. The coating process of this utility model reduces the use of electroplated aluminum film, lowering material and labor costs. Furthermore, the electron beam curing process throughout the production process results in low solvent emissions, making the process green, safe, and environmentally friendly, meeting environmental protection requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the novel anti-counterfeiting direct-coating paper structure in Example 1; Figure 2 This is a schematic diagram of the novel anti-counterfeiting direct-coating paper structure in Example 2; In the diagram: 1. Base paper layer, 2. Base coating layer, 3. Printing layer, 31. Perforated part, 32. Non-perforated part, 4. Medium layer, 5. Top coating layer. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings.

[0017] The following embodiment provides a novel interlayer structure for anti-counterfeiting direct-coated paper. The core logic of this structure is as follows: the base coating layer 2, the printing layer 3, and the dielectric layer 4 are combined to give the product both a three-dimensional raised feel and a cold foil stamping effect. The main function of the base coating layer 2 is to provide a low surface tension coating with a matte finish. The printing layer 3 provides a high surface tension coating with a glossy finish. Due to the surface tension difference between the base coating layer 2 and the printing layer 3, and the cohesive reaction of the resin in the printing layer 3, the coating undergoes condensation, creating a height difference on the surface and resulting in a three-dimensional raised feel. Simultaneously, due to the brightness difference between the base coating layer 2 and the printing layer 3, the base coating is matte, while the printing layer is brighter, achieving a glossy finish. After aluminum plating of the dielectric layer 4, the brightness difference between the two is amplified, resulting in a mirror-like high-gloss effect and a matte effect on the same printed material. This achieves high contrast in local graphics and text, achieving a cold foil stamping effect while also providing anti-counterfeiting performance. The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments: Example 1 This embodiment discloses a novel interlayer structure for anti-counterfeiting direct-coated paper, such as... Figure 1 As shown, it includes a base paper layer 1, a base coating layer 2, a printing layer 3, a media layer 4, and a top coating layer 5, with the coating structure arranged sequentially from bottom to top.

[0018] The basis weight of the base paper layer 1 is selected to be 225 g / m³. 2The paper base is used. The base coating 2 is an electron beam cured coating, and its coating formulation consists of a prepolymer, an active diluent, and a matting powder. The prepolymer is selected from polyester acrylates, the active diluent is selected from multifunctional diluents, and the matting powder is selected from high-titanium powder. The coating viscosity is 18s, the coating thickness is 1µm, and the surface tension is 32 dynes / cm. The matte effect is adjusted by changing the particle size and ratio of the matting powder. The printing layer 3 is an electron beam cured ink with a viscosity of 20s, a coating thickness of 6µm, and a surface tension of 38 dynes / cm. The printing layer 3 works in conjunction with the base coating 2 to achieve a three-dimensional raised effect and a cold foil stamping effect. The dielectric layer 4 is an aluminum-plated layer, whose main function is to amplify the brightness difference between the base coating 2 and the printing layer 3, visually achieving a high-contrast effect for local graphics and text, thus achieving a cold foil stamping effect. The top coating 5 is a pigment layer that changes the color of the top coating, with a coating amount of 3.0 g / m². 2 .

[0019] The novel anti-counterfeiting direct-coating paper in this embodiment can be prepared by the following method: A. Coating: A layer of electron beam curable coating, which is a mixture of prepolymer, reactive diluent and matting powder, is uniformly coated on the surface of the paper. The coating speed is 800 m / min, the coating viscosity is 18 s, the coating thickness is 1 μm, the surface tension is 32 dynes / cm, and the coating is dried and cured by hot air to form a film, thus obtaining the base coating 2.

[0020] B. Printing: Electron beam cured ink is fully printed on the base layer 2. The ink viscosity is 20s, the coating thickness is 6um, and the surface tension is 38 dynes / cm to obtain the printing layer 3.

[0021] C. Evaporation medium: A layer of aluminum medium with a thickness of 45um is uniformly vapor-deposited onto the paper with printing layer 3 on a vacuum aluminum plating equipment to obtain medium layer 4.

[0022] D. Topcoat: A topcoat is applied to the dielectric layer 4. The topcoat coating is a mixture of polyurethane resin and pigment in a 50:1 ratio. The pigment particle size range is 10-50 nm. This results in a novel anti-counterfeiting direct-coated paper comprising a base paper layer 1, a base coating layer 2, a printing layer 3, a dielectric layer 4, and a topcoat layer 5.

[0023] Example 2 This embodiment discloses a novel interlayer structure for anti-counterfeiting direct-coated paper, such as... Figure 2 As shown, it includes a base paper layer 1, a base coating layer 2, a printing layer 3, a media layer 4, and a top coating layer 5. The coating structure is arranged sequentially from bottom to top. The printing layer 3 adopts a localized positioning coating, including a hollowed-out portion 31 and a non-hollowed-out portion 32.

[0024] The basis weight of the base paper layer 1 is selected to be 60 g / m³. 2The paper base is used. The base coating 2 is an electron beam cured coating composed of a prepolymer, reactive diluent, and silver paste. The prepolymer is an epoxy acrylate, the reactive diluent is a monofunctional diluent, and the silver paste is gravure silver paste. The coating thickness is 1µm, and the surface tension is 34 dynes / cm. The matte effect is adjusted by changing the proportion of the silver paste. The printing layer 3 is an electron beam cured ink with a viscosity of 20s, a coating thickness of 7µm, and a surface tension of 40 dynes / cm. It works in conjunction with the base coating 2 to achieve a three-dimensional raised effect and a cold foil stamping effect. The dielectric layer 4 is an aluminum layer, whose main function is to amplify the brightness difference between the base coating 2 and the printing layer 3, visually achieving a high-contrast effect for local graphics and text, thus achieving the cold foil stamping effect. The top coating 5 is a pigment, which changes the color of the top coating, and the coating amount is 2.8g / m2.

[0025] The novel anti-counterfeiting direct-coating paper in this second embodiment can be prepared by the following method: A. Coating: A layer of electron beam curable coating, which is a mixture of prepolymer, reactive diluent and silver paste, is uniformly coated on the surface of the paper. The coating is then dried and cured into a film by hot air. The coating speed is 900 m / min, the ink viscosity is 20 s, the coating thickness is 7 μm, and the surface tension is 40 dynes / cm, resulting in the base coating 2.

[0026] B. Printing: Electron beam-cured ink is locally printed on the base layer 2. The ink viscosity is 20s, the coating thickness is 7um, and the surface tension is 40 dynes / cm, resulting in a printed layer 3 composed of the hollowed-out portion 31 and the non-hollowed-out portion 32.

[0027] C. Evaporation medium: A layer of aluminum medium with a thickness of 35um is uniformly vapor-deposited onto the paper with printing layer 3 on a vacuum aluminum plating equipment to obtain medium layer 4.

[0028] D. Topcoat: A topcoat is applied to the dielectric layer 4. The topcoat coating is a mixture of polyurethane resin and pigment in a 50:1 ratio. The pigment particle size range is 10-50 nm. This results in a novel anti-counterfeiting direct-coated paper comprising a base paper layer 1, a base coating layer 2, a printing layer 3, a dielectric layer 4, and a topcoat layer 5.

[0029] In embodiments of the present invention, the main function of the base layer is to provide a coating with low surface tension, resulting in a matte finish. The function of the printing layer is to provide a coating with high surface tension, resulting in a high-gloss finish. Due to the surface tension difference between the base layer and the printing layer, and the cohesive reaction of the resin in the printing layer, the coating undergoes condensation, creating a height difference on the surface and producing a three-dimensional convex effect. Simultaneously, due to the brightness difference between the base layer and the printing layer, the base layer is matte, while the ink layer is glossy, achieving a glossy finish. After aluminum plating of the dielectric layer, the brightness difference between the two is amplified, resulting in a mirror-like high-gloss effect and a matte effect on the same printed material. This visually achieves high contrast in local graphics and text, achieving the effect of cold foil stamping.

[0030] This utility model is not limited to the embodiments discussed above. The above description of specific embodiments is intended to describe and illustrate the technical solutions involved in this utility model. Obvious variations, substitutions, or combinations based on the teachings of this utility model should also be considered to fall within the protection scope of this utility model. The above specific embodiments are used to disclose the best implementation method of this utility model, so that those skilled in the art can apply various embodiments and alternative methods of this utility model to achieve the purpose of this utility model.

Claims

1. A novel anti-counterfeiting direct-coating paper, characterized in that, Its structural layers, from bottom to top, include the base paper layer, the base coating layer, the printing layer, the media layer, and the top coating layer; The base coating is an electron beam cured coating with a surface tension of 32-34 dynes / cm; The printed layer uses an electron beam-cured ink layer with a surface tension of 36-42 dynes / cm.

2. The novel anti-counterfeiting direct-coating paper as described in claim 1, characterized in that, The base paper layer is a paper-based material with a basis weight range of 30-340 g / m³. 2 .

3. A novel anti-counterfeiting direct-coating paper as described in claim 1 or 2, characterized in that, The viscosity of the base coating is 18-20s, and the coating thickness is 1µm.

4. The novel anti-counterfeiting direct-coating paper as described in claim 1, characterized in that, The printed layer uses electron beam cured ink with an ink viscosity of 18-20s and a coating thickness of 6-7µm.

5. The novel anti-counterfeiting direct-coating paper as described in claim 1, characterized in that, The coating method of the printed layer is localized positioning coating, including hollowed-out parts and non-hollowed-out parts.

6. The novel anti-counterfeiting direct-coating paper as described in claim 1, characterized in that, The printing layer is coated in a full-width manner.

7. The novel anti-counterfeiting direct-coating paper as described in claim 1, characterized in that, The dielectric layer is an aluminum dielectric layer obtained by vacuum evaporation, with a thickness of 35-45 μm.

8. The novel anti-counterfeiting direct-coating paper as described in claim 1, characterized in that, The surface coating is a type of paint or ink, and is dried using an electron beam curing method.

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