Anti-counterfeiting image printing method and device

Abstract

The invention provides an anti-counterfeiting image printing method and device, and relates to the technical field of anti-counterfeiting printing, and the method comprises the steps: S1, design preparation: firstly, creating the appearance design of an anti-counterfeiting image by using design software, storing the anti-counterfeiting image after the design is completed, and printing the anti-counterfeiting image on a leather product in a printing manner, the anti-fake image appearance can be observed under infrared irradiation without damaging the texture, the pattern and the like of the leather surface, the anti-fake image is scanned and uploaded to an anti-fake identification system provided by a product for comparison, the effective anti-fake identification effect can be achieved, meanwhile, the waterproof treatment and the wear-resisting treatment are added to the anti-fake image on the leather surface, and the anti-fake effect can be achieved. The situation that when the leather is corroded or abraded by water, the anti-fake image is prone to losing efficacy gradually and cannot be seen clearly in the using process is avoided, and the method has very important commercial prospects in brand protection of leather products and anti-fake traceability of second-hand products.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-counterfeiting printing, and in particular to an anti-counterfeiting image printing method and device. Background Art

[0002] Anti-counterfeiting image printing technology is a printing technology used to prevent forgery and counterfeiting, and its background involves a variety of complex optical, chemical and physical methods. These technologies ensure that the authenticity of documents or products can be verified by embedding difficult-to-copy features in printed matter. On artificial leather, some leathers are expensive and therefore can be counterfeited and pirated. The existing anti-counterfeiting methods are usually label QR code anti-counterfeiting, but there is a problem that it is easy to be called and destroyed forged, resulting in anti-counterfeiting failure, and it is still easy to be counterfeited and pirated. Summary of the invention

[0003] The purpose of the present invention is to solve the disadvantage that the anti-counterfeiting method in the prior art is easy to be called and destroyed forged, and to propose an anti-counterfeiting image printing method and device.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: an anti-counterfeiting image printing method, comprising:

[0005] S1: Design preparation: First, use the design software to create the appearance design of the anti-counterfeiting image. After the design is completed, save the anti-counterfeiting image;

[0006] S2: Base coating treatment: Apply one or more layers of base coating to the leather;

[0007] S3: Inkjet printing: The leather covering is flattened and placed on a temporary support, and then printed by an inkjet printer. During the printing process, the position sensor needs to be adjusted according to the shape and size of the leather to ensure the correct image layout;

[0008] S4: Top coating treatment: Apply one or more top coating layers over the image and base coating;

[0009] S5: Post-processing: Soak the printed leather in a waterproofing agent, and after it is naturally dried or air-dried, add an anti-scratch and slip agent to make the anti-counterfeiting image on the leather surface have anti-scratch and wear-resistant properties.

[0010] In a further embodiment of the present invention, in step S3, thermal transfer technology can also be used to transfer the design to leather on a preheated heat press, place transfer paper on the leather, and then apply appropriate temperature and pressure to transfer the image to the leather surface to generate an anti-counterfeiting image.

[0011] In a further embodiment of the present invention, the temperature of the hot press is 90-110°C and the pressure range is 20-30kg / cm 2 .

[0012] In a further embodiment of the present invention, the waterproofing agent in step S5 is WF20 soaked dry leather waterproofing agent, and the anti-scratch and slip agent is an organic silicone leveling agent or an anti-scratch and wear-resistant agent.

[0013] In a further embodiment of the present invention, in step S3, CMYK ink may be used to print on the leather.

[0014] In a further embodiment of the present invention, the base coating of step S2 comprises a polyurethane or polyamide polymer.

[0015] The printing device of the anti-counterfeiting image printing method comprises:

[0016] Image acquisition module: acquires anti-counterfeiting image data from the anti-counterfeiting image file stored in the design software;

[0017] Determination module: used to determine the printing position of the anti-counterfeiting image and adjust the position sensor according to the shape and size of the leather;

[0018] Printing module: Print the anti-counterfeiting image onto the leather printing position using printing technology to generate an anti-counterfeiting image.

[0019] In a further embodiment of the present invention, the printing technology is one of inkjet printing, direct printing and thermal transfer printing.

[0020] In a further embodiment of the present invention, the anti-counterfeiting image data obtained includes image size and resolution.

[0021] In a further embodiment of the present invention, the determination module further includes determining the distance between the first row of nozzle holes and the last row of nozzle holes of the printer nozzle as the target nozzle parameter.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] In the present invention, the anti-counterfeiting image is printed onto the leather product without destroying the texture and pattern of the leather surface itself. The appearance of the anti-counterfeiting image can be observed only under infrared light. The anti-counterfeiting image is scanned and uploaded to the anti-counterfeiting identification system provided by the product for comparison, thereby achieving effective anti-counterfeiting identification. At the same time, waterproofing and wear-resistant treatments are added to the anti-counterfeiting image on the leather surface to avoid the situation where the anti-counterfeiting image gradually becomes ineffective and unclear during use when the leather is eroded or worn by water. This has very important commercial prospects in terms of brand protection of leather products and anti-counterfeiting traceability of second-hand products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flowchart of an anti-counterfeiting image printing method and device is proposed for the present invention;

[0025] Figure 2 The present invention proposes an anti-counterfeiting image printing method and device, and provides effect diagrams of the anti-counterfeiting image in a normal state and when the anti-counterfeiting image is displayed. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0028] Embodiment 1

[0029] See also Figure 1 The present invention provides an anti-counterfeiting image printing method, comprising:

[0030] S1: Design preparation: First, use the design software to create the appearance design of the anti-counterfeiting image. After the design is completed, save the anti-counterfeiting image;

[0031] S2: Base coating treatment: Apply one or more layers of base coating to the leather;

[0032] The base coating of step S2 includes polyurethane or polyamide polymer, and the base coating of polyurethane or polyamide polymer has various advantages, for example, mechanical properties and durability: polyurethane coating has excellent mechanical properties, such as high tensile strength, tear strength and elongation at break, which makes the finished leather more durable and less prone to damage during use. In addition, by adding solid fillers such as silica nanoparticles, the mechanical properties, waterproofness and breathability of the coating can be further improved: polyurethane coating can effectively improve the waterproof performance of leather while maintaining good breathability. For example, a silica nanoparticle dispersion prepared by a sol-gel process can improve the water vapor permeability of finished leather. This property enables the leather to maintain comfort and functionality in a humid environment, antibacterial and self-healing ability: polyurethane coating can also give leather antibacterial function, prevent the growth of microorganisms and the formation of biofilm, thereby improving the hygienic properties of leather. In addition, new waterborne polyurethanes (such as ZIWPU) also have the ability to self-repair quickly at room temperature, which can repair small scratches and cracks in daily use and extend the service life of leather. Environmental protection and sustainability: As a green material, waterborne polyurethane (WPU) has the advantages of non-flammability, low odor, and no pollution to the environment, and gradually replaces traditional solvent-based PU finishing agents. In addition, researchers are exploring the use of sustainable resources to develop more environmentally friendly PU coatings, such as self-healing polyurethane coatings based on geraniol and linseed oil. Versatility and multifunctional design: Polyurethane coatings can enhance the conductivity, liquid repellency and seawater corrosion resistance of leather products by introducing functional nanomaterials (such as graphene, titanium dioxide nanoparticles, etc.). These characteristics provide more application possibilities for leather products, such as applications in electronic devices. Beauty and feel: Polyurethane coatings can significantly improve the gloss, elasticity and softness of leather, making the finished leather feel full, comfortable, and more beautiful in appearance. For example, cationic waterborne polyurethane bottom coating agents can produce a bonding effect with anionic top coating agents, making the leather feel softer and fuller, and significantly improving the overall quality and service life of leather products through the base coating of polyurethane or polyamide polymers;

[0033] S3: Inkjet printing: The leather covering is flattened and placed on a temporary support, and then printed by an inkjet printer. During the printing process, the position sensor needs to be adjusted according to the shape and size of the leather to ensure the correct image layout;

[0034] In the step S3, thermal transfer technology can also be used to transfer the design to the leather on a preheated hot press, place the transfer paper on the leather, and then apply appropriate temperature and pressure to transfer the image to the leather surface to generate an anti-counterfeiting image. The use of thermal transfer technology has the following advantages: high pattern fineness: thermal transfer technology can achieve fine expression of pattern lines and rich layering effects, which makes the pattern finally transferred to the leather have high artistry and ornamental value; strong personalized customization ability: thermal transfer technology allows leather products to be personalized to meet consumers' demand for unique designs. This technology is widely used in the decoration of leather products such as leather bags, leather shoes, and belts, which improves the added value and market competitiveness of the products. It is easy to operate and has high production efficiency: the thermal transfer process is simple to operate, has few production processes, and is highly efficient. Just print the design on the transfer paper, and then apply appropriate temperature and pressure through the hot press to transfer the pattern to the leather surface. This process not only saves manpower and material resources, but also greatly shortens the production time, and has strong durability: the thermal transfer pattern is firmly attached to the leather surface, is not easy to fade, peel or damage, and has a long service life. In addition, thermal transfer patterns usually have high gloss and vivid colors, which further enhances the aesthetics of leather products. It is environmentally friendly: compared with traditional printing methods, thermal transfer technology reduces the use of chemical solvents and is more environmentally friendly. At the same time, due to less pollution in its production process, it meets the environmental protection requirements of modern manufacturing industry;

[0035] In the step S3, CMYK ink can also be used to print on leather. Using CMYK ink can reduce the impact on the environment. For example, some CMYK inks use biodegradable natural dyes, which not only reduces chemical pollution, but also improves the environmental attributes of the product. The printing effect of CMYK ink on leather usually has high durability and anti-fading ability, which means that the printed pattern can remain bright and clear for a long time and is not easy to fade due to friction or washing. CMYK ink is suitable for a variety of materials, including leather. This versatility makes it possible to achieve consistent printing effects on different products, thereby meeting diverse market needs. The CMYK color mode can produce a wide range of colors by mixing four basic inks: cyan, magenta, yellow and black, thereby ensuring accurate color control and reproduction when printing on leather. This is particularly important for products that require high-quality visual effects. CMYK printing is usually more economical than spot color printing, especially in large-scale production. Since CMYK printing uses four basic inks, it is relatively simple to set up and maintain, reducing production costs and operational complexity;

[0036] The temperature of the hot press is 90-110°C and the pressure range is 20-30kg / cm 2There is a mutually restrictive relationship between temperature and pressure. During the hot pressing process, if the temperature is low, the pressure needs to be increased to achieve the same effect; conversely, if the temperature is high, the pressure can be appropriately reduced;

[0037] S4: Top coating treatment: Apply one or more top coating layers over the image and base coating;

[0038] S5: Post-treatment: Soak the printed leather in a waterproofing agent, allow it to dry naturally or in the air, and then add an anti-scratch and slip agent to make the anti-counterfeiting image on the leather surface have anti-scratch and wear-resistant properties;

[0039] The waterproofing agent of the step S5 is WF20 soaked leather waterproofing agent. WF20 is an oily fluorine-free waterproofing agent that meets modern environmental protection requirements, does not contain fluorine, and will not pollute the environment. WF20 can cross-link and form a film under normal temperature conditions, does not require equipment such as an oven, and can give leather excellent water impact resistance, water penetration resistance and water repellency by soaking and drying or air drying. In addition, it also has good friction resistance and is suitable for waterproof leather production with high anti-siphon performance requirements. The use method of WF20 is simple, and the leather only needs to be completely immersed in the waterproofing agent working liquid, and then naturally dried or air-dried. This process does not require complex equipment, reduces production costs and operational difficulties, and WF20 has excellent washing resistance and anti-siphon performance, and can maintain a good waterproof effect after multiple washings. The anti-scratch slip agent is an organosilicon leveling agent or an anti-scratch and wear-resistant agent. The organosilicon leveling agent can significantly improve the fluidity and transparency of the leather, making the leather surface smoother and flatter, while providing a good feel and gloss. In addition, silicone leveling agents also have anti-cratering, smoothness and anti-adhesion / peeling effects, further improving the overall texture of leather. Silicone leveling agents and anti-scratch and wear-resistant agents can significantly improve the wear resistance and scratch resistance of leather. For example, leather treated with silicone will not crack or wear after being scratched by keys or steel wool, keeping the surface intact. This property makes leather more durable in daily use and extends its service life. Silicone leather has excellent weather resistance, including hydrolysis resistance, light resistance and UV resistance, which makes it stable in various harsh environments. In addition, silicone leather has low surface tension and high anti-fouling grade. Common stains such as ballpoint pens and soy sauce are difficult to adhere to the surface and are easy to clean. Silicone materials do not contain solvents or harmful chemicals, and are friendly to the environment and human health. This makes silicone leather a more environmentally friendly choice, in line with the modern consumer's demand for health and environmental protection. Silicone leveling agents and anti-scratch and wear-resistant agents not only improve the physical properties of leather, but also enhance the waterproof, breathable and antibacterial and mildew-proof properties of leather. These properties make silicone leather widely used in automotive interiors, outdoor products, home furnishings and other fields.

[0040] Embodiment 2

[0041] The printing device of the anti-counterfeiting image printing method is characterized by comprising:

[0042] Image acquisition module: obtain anti-counterfeiting image data from the anti-counterfeiting image file stored in the design software, and prepare high-definition and appropriately sized materials, including backgrounds, icons, text, etc. At the same time, design anti-counterfeiting marks, such as QR codes, barcodes, etc., to ensure that they are unique and easy to identify, use graphic processing techniques to beautify the designed images, adjust the brightness, contrast and saturation, add gradient, shadow and texture effects to enhance the visual effect and anti-counterfeiting performance of the images, adjust the size and layout of the images according to actual application requirements, ensure the overall style is unified, and meet the requirements of the final output, and embed anti-counterfeiting information in the image, such as embedding anti-counterfeiting information into the image through digital watermarking technology. This step can be achieved through a variety of methods, using the prediction error expansion (PEE) technology to embed the authentication bit into the image to ensure the reversibility and tampering detection capability of the image, store the generated anti-counterfeiting image file in a secure storage device, and establish a corresponding filing and retrieval mechanism, and use the edge filing storage retrieval module to store the deep feature encoding information of the anti-counterfeiting image label, thereby improving data security and management efficiency;

[0043] Determination module: used to determine the printing position of the anti-counterfeiting image, adjust the position sensor according to the shape and size of the leather, and the position sensor can be moved as needed to adapt to the sensing requirements of different media. If the shape of the leather is irregular, the position of the sensor can be manually adjusted to ensure that it accurately detects the edge of the leather. After the sensor adjustment is completed, the first target printing position and the second target printing position of the anti-counterfeiting image are determined according to the actual position information of the leather;

[0044] Printing module: Print the anti-counterfeiting image onto the leather printing position using printing technology to generate an anti-counterfeiting image, perform quality inspection on the printed anti-counterfeiting image to ensure that the image is clear, colorful and not easy to be copied, and use specific equipment or software to detect the validity of the anti-counterfeiting information;

[0045] The printing technology is one of inkjet printing, direct printing and thermal transfer printing;

[0046] The anti-counterfeiting image data obtained includes image size and resolution. Anti-counterfeiting images usually need to adopt specific image formats, such as BMP, JPEG, JPEG2000 and PNG. These formats help to ensure that the image remains consistent during transmission and storage, and prevent tampering. In order to prevent the image from being tampered with during transmission or storage, some quality control measures are adopted, and digital watermarks can be added. In addition, the security of the image can be improved by setting the grayscale level of the image (such as 256 levels). The anti-counterfeiting image should have no obvious geometric distortion, and the geometric distortion should be less than or equal to 5%. This can be achieved by using an algorithm to detect the degree of geometric deformation of the image to ensure that the image remains clear and complete when printed or displayed. The image file may contain metadata tags that can reveal the source of the image, camera settings, and editing history. By managing these metadata, the generation and modification process of the image can be better tracked, thereby improving the anti-counterfeiting effect;

[0047] The determination module further includes determining a distance between a first row of nozzle holes and a last row of nozzle holes of the printer nozzle as a target nozzle parameter.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for printing an anti-counterfeiting image, characterized in that: include: S1: Design preparation: First, use the design software to create the appearance design of the anti-counterfeiting image. After the design is completed, save the anti-counterfeiting image; S2: Base coating treatment: Apply one or more layers of base coating to the leather; S3: Inkjet printing: The leather covering is flattened and placed on a temporary support, and then printed by an inkjet printer. During the printing process, the position sensor needs to be adjusted according to the shape and size of the leather to ensure the correct image layout; S4: Top coating treatment: Apply one or more top coating layers over the image and base coating; S5: Post-processing: Soak the printed leather in a waterproofing agent, and after it is naturally dried or air-dried, add an anti-scratch and slip agent to make the anti-counterfeiting image on the leather surface have anti-scratch and wear-resistant properties.

2. The anti-counterfeiting image printing method according to claim 1, characterized in that: In step S3, thermal transfer technology can also be used to transfer the design to the leather on a preheated heat press, place the transfer paper on the leather, and then apply appropriate temperature and pressure to transfer the image to the leather surface to generate an anti-counterfeiting image.

3. The anti-counterfeiting image printing method according to claim 2, characterized in that: The temperature of the hot press is 90-110°C and the pressure range is 20-30kg / cm 2 .

4. The anti-counterfeiting image printing method according to claim 1, characterized in that: The waterproofing agent in step S5 is WF20 soaked dry leather waterproofing agent, and the anti-scratch and slip agent is an organic silicone leveling agent or an anti-scratch and wear-resistant agent.

5. The anti-counterfeiting image printing method according to claim 1, characterized in that: In step S3, CMYK ink may also be used to print on the leather.

6. The anti-counterfeiting image printing method according to claim 1, characterized in that: The base coating of step S2 comprises polyurethane or polyamide polymer.

7. The printing device of the anti-counterfeiting image printing method according to any one of claims 1 to 6, characterized in that: include: Image acquisition module: acquires anti-counterfeiting image data from the anti-counterfeiting image file stored in the design software; Determination module: used to determine the printing position of the anti-counterfeiting image and adjust the position sensor according to the shape and size of the leather; Printing module: Print the anti-counterfeiting image onto the leather printing position using printing technology to generate an anti-counterfeiting image.

8. The anti-counterfeiting image printing device according to claim 7, characterized in that: The printing technology is one of inkjet printing, direct printing and thermal transfer printing.

9. The anti-counterfeiting image printing method according to claim 7, characterized in that: The acquired anti-counterfeiting image data includes image size and resolution.

10. The anti-counterfeiting image printing method according to claim 7, characterized in that: The determination module further includes determining a distance between a first row of nozzle holes and a last row of nozzle holes of the printer nozzle as a target nozzle parameter.

Images