A thermochromic flexographic printing formed security pattern

Abstract

An anti-counterfeiting pattern formed by thermochromic offset printing includes: a base layer, an offset printing layer, and a thermochromic layer. The base layer includes a base fabric for providing support and adhesion. The offset printing layer includes an underlay and a first ink. The offset printing layer prints an initial pattern on the underlay using the first ink. The thermochromic layer covers the initial pattern on the offset printing layer with a second ink to form the anti-counterfeiting pattern. This application achieves the invisible display function of the anti-counterfeiting pattern through the temperature response characteristics of the thermochromic layer, effectively preventing the anti-counterfeiting pattern from being illegally scanned and copied, and significantly improving the anti-counterfeiting performance.

Description

Technical Field

[0001] This utility model is an anti-counterfeiting pattern formed by thermochromic offset printing, belonging to the field of anti-counterfeiting labels. Background Technology

[0002] With rapid economic development and the continuous expansion of the consumer market, the problem of counterfeit and shoddy products has become increasingly serious, especially in the clothing and footwear industry. The circulation of counterfeit products not only harms the interests of consumers but also seriously affects the reputation of brand owners. Therefore, anti-counterfeiting technology has become particularly important in the packaging and anti-counterfeiting codes of clothing and footwear products.

[0003] While some special anti-counterfeiting technologies exist, such as laser anti-counterfeiting marks, password anti-counterfeiting labels, and texture anti-counterfeiting, these technologies also have many drawbacks. Laser anti-counterfeiting marks and password anti-counterfeiting labels are relatively easy to counterfeit and are difficult to effectively prevent counterfeiting. Although texture anti-counterfeiting is more difficult to counterfeit, it only has a clear serial number and cannot prevent repeated queries and copying. In addition, the application of QR codes in packaging design is relatively limited, which affects the overall packaging effect.

[0004] In addition, existing anti-counterfeiting codes have shortcomings in their integration with clothing and footwear. For example, the anti-counterfeiting codes have poor adhesion and are easily detached during washing or friction; their abrasion resistance and scratch resistance are insufficient, affecting their anti-counterfeiting effect; and the color and pattern design of the anti-counterfeiting codes are not flexible enough, making it difficult to integrate with the overall design of clothing and footwear. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-counterfeiting pattern formed by thermochromic offset printing, so as to solve the problems that the existing anti-counterfeiting patterns used on shoe uppers or clothing have poor anti-counterfeiting effect and are easy to fall off.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a temperature-sensitive offset printing anti-counterfeiting pattern, comprising:

[0007] A base layer comprising a base fabric for providing support and attachment to the substrate;

[0008] The offset printing layer includes an underlayer and a first ink, wherein the offset printing layer prints an initial pattern on the underlayer using the first ink;

[0009] A thermochromic layer is formed by overprinting the initial pattern on the offset layer with a second ink to create an anti-counterfeiting pattern.

[0010] Furthermore, the base layer also includes an adhesive layer coated on the surface of the base fabric to enhance the adhesion between the base fabric and the offset printing layer.

[0011] Furthermore, the underlayer is formed by printing water-based adhesive onto the base fabric.

[0012] Furthermore, the underlying layer can be multi-layered or partially single-layered.

[0013] Furthermore, the temperature-changing layer is a single layer.

[0014] Furthermore, the second ink is a thermochromic ink.

[0015] Furthermore, the color-changing temperature range of the second ink is 30-40℃.

[0016] Furthermore, the pattern may include an anti-counterfeiting QR code, an anti-counterfeiting barcode, or other patterns.

[0017] A method for preparing an anti-counterfeiting pattern formed by thermochromic offset printing, the method comprising the following steps:

[0018] S1. Base fabric treatment steps: Apply treatment agent to the base fabric;

[0019] S2. Printing steps: After the base fabric is processed in step one, water-based adhesive is used to apply a three-dimensional base layer. It is then cured by baking at a low temperature of 50-60℃. Finally, the initial pattern is printed on the water-based adhesive using the first ink.

[0020] S3. Temperature change treatment step: The initial pattern completed in step two is covered and printed with the second ink to form an anti-counterfeiting pattern. The treated base fabric is placed on the baking rack and baked in a baking room at 50-70℃ for 12-24 hours.

[0021] The beneficial effects of this utility model are:

[0022] 1. This application achieves the invisible display function of anti-counterfeiting pattern through the temperature response characteristics of the thermochromic layer, effectively preventing the anti-counterfeiting pattern from being illegally scanned and copied, significantly improving the anti-counterfeiting performance, and the multi-layer thermochromic layer design increases the difficulty of counterfeiting, effectively preventing the circulation of counterfeit and shoddy products.

[0023] 2. The thermochromic offset printing anti-counterfeiting pattern of this application can be designed with different colors and patterns according to requirements, which meets the requirements of packaging aesthetics, enriches the application forms of anti-counterfeiting patterns in packaging design, and this technology can be applied to a variety of base fabric materials, with wide applicability, and can meet the anti-counterfeiting needs of different products.

[0024] 3. The adhesive layer and underlayment on the base fabric of this application enhance the adhesion of the coating, improve the printing quality, and ensure the clarity and uniformity of the anti-counterfeiting pattern. By using screen printing with mesh of different specifications, the uniform distribution of ink and the clarity of the pattern are ensured. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of a shoe upper with an anti-counterfeiting pattern formed by thermochromic offset printing according to this utility model;

[0027] Figure 2 This is a cross-sectional structural diagram of an anti-counterfeiting pattern formed by thermochromic offset printing according to this utility model.

[0028] Figure 3 This is a schematic cross-sectional view of the bottom fabric with circular pores in this utility model.

[0029] Figure 4 This is a schematic cross-sectional view of the bottom fabric with square pores in this utility model.

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the bottom fabric with rhomboid pores in this utility model.

[0031] The reference numerals in the attached figures are as follows: 1, base layer; 11, base fabric; 12, adhesive layer; 2, offset printing layer; 21, underlay layer; 3, thermochromic layer. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] [An anti-counterfeiting pattern formed by thermochromic offset printing according to this utility model]

[0034] like Figure 1 , Figure 2 As shown, this utility model provides a technical solution for an anti-counterfeiting pattern formed by thermochromic offset printing, which includes:

[0035] A base layer 1, comprising a base fabric 11, for providing support and attachment base;

[0036] The offset printing layer 2 includes a base layer 21 and a first ink, wherein the offset printing layer 2 prints an initial pattern on the base layer 21 using the first ink;

[0037] Thermochromic layer 3, wherein the thermochromic layer 3 is formed by overprinting the initial pattern on offset layer 2 with a second ink to form an anti-counterfeiting pattern.

[0038] To increase adhesion and facilitate printing, the base layer 1 further includes an adhesive layer 12, which is coated on the surface of the base fabric 11 to enhance the adhesion between the base fabric 11 and the offset printing layer 2.

[0039] To enhance ink adhesion, the underlayer 21 is formed by printing water-based adhesive onto the base fabric 11.

[0040] To optimize the anti-counterfeiting effect, the bottom layer 21 is set as multiple layers or partial single layers.

[0041] To achieve anti-counterfeiting, the temperature-changing layer 3 is a single layer.

[0042] To achieve the printing of the anti-counterfeiting pattern, the second ink is a thermochromic ink.

[0043] To achieve temperature-responsive anti-counterfeiting effects, the second ink has a color-changing temperature range of 30-40℃.

[0044] To adapt to various application scenarios, the pattern includes anti-counterfeiting QR codes, anti-counterfeiting barcodes, or other patterns.

[0045] [A method for preparing an anti-counterfeiting pattern formed by thermochromic offset printing according to this utility model]

[0046] To ensure the efficiency and consistency of the preparation method, this utility model also provides a method for preparing anti-counterfeiting patterns formed by thermochromic offset printing, the preparation method comprising the following steps:

[0047] S1. Base fabric treatment steps: Apply treatment agent to base fabric 11;

[0048] S2. Printing steps: After the base fabric 11 is processed in step one, water-based adhesive is used to apply a three-dimensional base layer. It is then cured by baking at a low temperature of 50-60℃. Finally, the initial pattern is printed on the water-based adhesive using the first ink.

[0049] S3. Temperature change treatment step: The initial pattern completed in step two is covered and printed with the second ink to form an anti-counterfeiting pattern. The treated base cloth 11 is placed on the baking rack and baked in a baking room at 50-70℃ for 12-24 hours.

[0050] Example 1:

[0051] like Figure 1 As shown, the thermochromic layer 3 covers the offset printing layer 2. When the temperature is less than 30℃, the thermochromic layer 3 is in a colored state and covers the initial pattern. For better coverage, dark ink can be used. When the temperature is between 30-40℃, the thermochromic layer 3 becomes transparent and the initial pattern is revealed. At this time, the initial pattern can be used to verify anti-counterfeiting.

[0052] Example 2:

[0053] In this application, the thermochromic layer 3 is only applied to the initial pattern to form an anti-counterfeiting pattern, and the second ink is selected to be the same color as the first ink. It is printed in a single layer during the printing process to better hide the initial pattern and achieve a better anti-counterfeiting effect.

[0054] Example 3:

[0055] The base fabric treatment step in this application refers to applying a treatment agent to the base fabric 11 using a screen to enhance adhesion, thereby forming an adhesive layer 12.

[0056] The printing process includes three-dimensional priming and offset printing. Three-dimensional priming refers to applying water-based adhesive to the adhesive layer 12 using a screen to form a base layer 21. The three-dimensional priming process is designed to create a synergistic effect with the colors printed later, making the colors appear more vibrant. The base layer 21 also provides physical protection for the printed pattern and resists the erosion of some chemicals. Offset printing involves pouring the first ink of the prepared color onto the screen and scraping it downwards with a squeegee at an angle, applying force, and evenly. The ink passes through the screen and is repeatedly printed onto the base fabric 11 to form the offset printing layer 2.

[0057] The temperature-sensitive treatment step refers to using a screen printing plate to evenly cover the second ink on the offset printing layer 2 where anti-counterfeiting is required. The baking and curing step refers to placing the anti-counterfeiting base cloth 11 on a baking rack and sending it into a baking room at 50-70℃ for 12-24 hours to achieve the desired shape.

[0058] Example 4:

[0059] Depending on different anti-counterfeiting requirements, the second ink can be used to print the thermochromic layer 3 once or multiple times. The specific implementation method is as follows:

[0060] S1. Select two identical base fabrics 11, and complete the adhesive layer 12 and the base layer 21 on them;

[0061] S2. Print anti-counterfeiting patterns on the base layer 21 using the first ink;

[0062] S3. Cover the anti-counterfeiting pattern with a second ink, and print it once and multiple times respectively;

[0063] S4. Place the printed base fabric 11 into a baking oven at 60℃ and bake for 24 hours to ensure that the ink is completely cured.

[0064] S5. Observe the cured base fabric 11, and observe its thickness, color, visual effect, performance and anti-counterfeiting features.

[0065] The specific observation results are as follows: Example 1 was a single printing, and Example 2 was a multiple printing.

[0066]

[0067] By adjusting the number of printing cycles of the thermochromic layer 3, a balance can be achieved between response speed and anti-counterfeiting effect according to actual needs. For scenarios requiring rapid identification, fewer printing cycles can be selected; while for scenarios requiring high anti-counterfeiting performance, more printing cycles can be selected. This flexible design enables this application to adapt to different application scenarios and provide the optimal anti-counterfeiting solution.

[0068] Example 5:

[0069] To achieve advanced anti-counterfeiting effects on the shoe upper pattern, inks with different temperature-sensitive ranges can be used in the design. The pattern exhibits different gradient effects at different temperature ranges, and its visibility or concealment at specific temperatures achieves anti-counterfeiting purposes. Three different temperature-sensitive inks with varying color-changing temperature ranges can be selected. For example: Ink A changes from red to orange at 20℃-35℃, Ink B changes from yellow to green at 25℃-35℃, and Ink C changes from blue to purple at 30℃-35℃. The manufacturing process of temperature-sensitive layer 3 is as follows:

[0070] S1. Ink preparation: Mix the three thermochromic inks A, B, and C with the ink base agent in a certain ratio to prepare three thermochromic inks. The ratio of ink A to ink base agent is 1:3, the ratio of ink B to ink base agent is 1:4, and the ratio of ink C to ink base agent is 1:3.5. Then add an appropriate amount of solvent to dilute to a suitable printing viscosity.

[0071] S2. Printed Pattern: Screen printing is used to print three types of thermochromic inks sequentially on the pattern area of ​​the shoe upper. Each ink is fully dried after printing to ensure clear pattern and firm ink adhesion, thereby enhancing the anti-counterfeiting properties of the pattern.

[0072] The test results are as follows: When the ambient temperature is below 20℃, the shoe upper pattern displays red, yellow, and blue, which is the normal initial state and can serve as a basic visual effect for consumers to make a preliminary identification. When the temperature rises to 20℃-25℃, ink A turns orange, and the corresponding area of ​​the pattern changes color, allowing consumers to initially judge the authenticity of the product through color changes. When the temperature rises to 25℃-30℃, ink B turns green, and the pattern changes further, allowing consumers to further confirm authenticity. When the temperature rises to 30℃-35℃, ink C turns purple, and the pattern presents a final unique color combination, providing consumers with a higher level of anti-counterfeiting verification. If the temperature continues to rise, the pattern can undergo reversible or irreversible changes depending on the ink design, such as returning to the original color or displaying a special warning color, providing additional protection for the product's anti-counterfeiting in special temperature environments.

[0073] In summary, depending on the product requirements, thermochromic inks with different temperature ranges can be selected for printing to achieve a more advanced anti-counterfeiting effect. The thermochromic inks will gradually disappear under different temperature conditions, achieving a gradient effect.

[0074] Example 6:

[0075] To achieve better thermochromic effects, the base layer 1, offset printing layer 2, and thermochromic layer 3 of this application all require certain treatments. For example, the surface flatness and smoothness of the base fabric 11 have a significant impact on the printing effect of the offset printing layer 2. The porosity of the base fabric 11 is moderate, which ensures that the ink of the offset printing layer 2 can fully penetrate and be fixed without affecting its color and thickness due to excessive absorption. The offset printing layer 2 forms a uniform film on the base fabric 11, playing a connecting role and providing a relatively flat, smooth, and stable base for the thermochromic layer 3. The surface tension and chemical properties of the offset printing layer 2 ensure that it adheres firmly to the base fabric 11, and the ink particles of the thermochromic layer 3 are embedded in the micropores on the surface of the offset printing layer 2. Together, they form a thermochromic pattern with anti-counterfeiting function.

[0076] Therefore, before printing, the base fabric 11 is degreased, cleaned, and slightly roughened to remove surface impurities, increase the surface roughness of the base fabric 11, and improve the adhesion between the first ink and the base fabric 11. Alternatively, an appropriate amount of adhesion promoter, such as a silane coupling agent, can be added to the first ink as needed to enhance the chemical bonding between the ink and the base fabric 11. Or, the drying temperature and time of the offset printing layer 2 can be controlled to allow it to fully cure and form a dense film layer, providing better support for the thermochromic layer 3. Or, the thermochromic ink can be surface modified, such as by using a silane coupling agent or a titanate coupling agent, to improve the compatibility and dispersibility of the thermochromic ink with the binder, so that the thermochromic ink is evenly distributed in the ink, thereby improving the adhesion of the thermochromic layer 3 and the uniformity of the thermochromic effect.

[0077] Example 7:

[0078] like Figure 3 , Figure 4 and Figure 5 As shown, the pore shape of the base fabric 11 can be designed as rhombus, circle, or square. Each of these three shapes has its own characteristics and can be selected according to actual needs. Among them, the rhombus pores have a regular geometric shape, and the ratio of their major axis to minor axis can be adjusted as needed. Furthermore, pairs of rhombuses can form a mesh structure to provide better air permeability and a certain mechanical strength. At the same time, when combined with the adhesive layer 12 and the offset printing layer 2, the adhesive and ink can form a stable anchoring structure in the pores, enhancing the bonding force. The circular pores are directional, exhibiting the same extensibility and stability in different directions. The square pores have relatively regular edges, and when arranged, they can form a more uniform pore distribution, which is beneficial to improving the dimensional stability and processability of the base fabric 11. During the coating of the adhesive layer 12 and the printing of the offset printing layer 2, the adhesive and ink can be distributed more evenly, thereby obtaining a flat adhesive layer 12 and a clear offset printing pattern.

[0079] The pore arrangement of the base fabric 11 is also diverse, mainly including regular and irregular arrangements. Regular arrangements can effectively improve the breathability and uniformity of the base fabric 11, while making the bond between the adhesive layer 12 and the base fabric 11 stronger, and the pattern of the printed layer 2 more regular and neat. Irregular arrangements can give the base fabric 11 a unique appearance and texture, increasing the product's individuality and creativity. At the same time, the irregular pore distribution can reduce stress concentration, allowing the base fabric 11 to distribute stress more evenly when under force, which can also improve the breathability and elasticity of the base fabric 11 to a certain extent.

[0080] Example 8:

[0081] To enhance the bond between the adhesive layer 12 and the base fabric 11 and the underlayment 21, the adhesive layer 12 can be applied using different methods such as textured coating, roller coating, or spraying, so that the adhesive layer 12 is more evenly distributed between the base fabric 11 and the underlayment 21, thereby improving the bonding strength and quality.

[0082] For special shoe upper structure requirements, local reinforcement bonding can be used to increase the thickness of the adhesive layer 12 in areas that are prone to stress or wear, or to use special high-strength adhesives to enhance the durability of the shoe upper.

[0083] Example 9:

[0084] When the base layer 21 is set as a partial single layer, it can make the printing colors bright, enhance the three-dimensionality and visual effect of the pattern, and at the same time provide physical protection for the pattern, resist chemical corrosion, and extend the life of the pattern.

[0085] When the underlay 21 is set to multiple layers, the increased thickness and density of the multi-layer underlay 21 enhances the saturation and three-dimensionality of the colors, making the printed pattern more layered and textured. At the same time, it provides stronger physical protection for the printed pattern, effectively resisting damage from external forces such as friction and collision, and also enhancing its resistance to chemical substances, further extending the service life of the printed pattern.

[0086] In this application, the first ink may be referred to as ordinary ink or offset printing ink; the second ink may be referred to as thermochromic ink.

[0087] The anti-counterfeiting pattern of this application can be used on clothing, shoe uppers, bags or packaging materials, with a wide range of applications and simple preparation steps.

[0088] This application achieves the invisible display function of anti-counterfeiting pattern through the temperature response characteristics of temperature-sensitive layer 3, effectively preventing the anti-counterfeiting pattern from being illegally scanned and copied, significantly improving the anti-counterfeiting performance. Moreover, the design of multiple temperature-sensitive layers 3 increases the difficulty of counterfeiting and effectively prevents the circulation of counterfeit and shoddy products.

[0089] The thermochromic offset printing anti-counterfeiting pattern of this application can be designed with different colors and patterns according to requirements, which meets the requirements of packaging aesthetics, enriches the application forms of anti-counterfeiting patterns in packaging design, and this technology can be applied to a variety of base fabric materials, with wide applicability, and can meet the anti-counterfeiting needs of different products.

[0090] The adhesive layer 12 and the underlayer 21 on the base fabric 11 of this application enhance the adhesion of the coating, improve the printing quality, and ensure the clarity and uniformity of the anti-counterfeiting pattern. By using screen printing with mesh of different specifications, the uniform distribution of ink and the clarity of the pattern are ensured.

[0091] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0092] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A type of anti-counterfeiting pattern formed by thermochromic offset printing, characterized in that: It includes: A base layer (1) comprising a base fabric (11) for providing support and attachment base; The offset printing layer (2) includes a base layer (21) and a first ink, wherein the offset printing layer (2) prints an initial pattern on the base layer (21) using the first ink; Thermochromic layer (3) is formed by overprinting the initial pattern on offset layer (2) with a second ink to create an anti-counterfeiting pattern.

2. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 1, characterized in that: The base layer (1) further includes an adhesive layer (12) coated on the surface of the base fabric (11) to enhance the adhesion between the base fabric (11) and the offset printing layer (2).

3. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 1, characterized in that: The underlayment (21) is formed by printing water-based adhesive onto the base fabric (11).

4. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 1, characterized in that: The base layer (21) can be multi-layered or partially single-layered.

5. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 1, characterized in that: The temperature-changing layer (3) is a single layer.

6. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 1, characterized in that: The second ink is a thermochromic ink.

7. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 6, characterized in that: The second ink has a color-changing temperature range of 30-40℃.

8. The anti-counterfeiting pattern formed by thermochromic offset printing according to claim 1, characterized in that: The pattern may include anti-counterfeiting QR codes, anti-counterfeiting barcodes, or other patterns.

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