Laser anti-counterfeiting fluorescent stay wire

Abstract

The utility model discloses a laser anti-counterfeiting fluorescent stay wire, which comprises a base film layer, a first corona layer and a second corona layer, the first corona layer and the second corona layer are respectively arranged on two sides of the base film layer, an isolating layer is arranged on the first corona layer, an aluminized layer is arranged on the second corona layer, and a color-changing anti-counterfeiting layer is arranged on the aluminized layer. The color-changing anti-counterfeiting layer comprises a temperature-changing fiber layer and anti-counterfeiting ink printing layers located on the two sides of the temperature-changing fiber layer, the temperature-changing fiber layer and the anti-counterfeiting ink printing layers are arranged in parallel in the length direction of the base film layer, a bonding layer is locally arranged on the color-changing anti-counterfeiting layer in a scattered mode, and a plurality of metal oxide layers are sequentially arranged on the bonding layer. Metal oxides in the metal oxide layers are different, and pressure-sensitive adhesive sticker layers are arranged on the color-changing anti-counterfeiting layer and the metal oxide layers. In conclusion, the utility model has the advantages that the imitation threshold can be improved, the anti-counterfeiting performance is good, and the appearance quality is good.

Description

Technical Field

[0001] This utility model relates to the field of packaging anti-counterfeiting technology, specifically to a laser anti-counterfeiting fluorescent pull cord. Background Technology

[0002] A pull tab is a thin thread or band attached to the packaging film of products such as tobacco, making it easier to open the package. Tobacco, VCDs, DVDs, and many other products require a plastic film wrapping for moisture protection and decoration. To facilitate tearing open the packaging film, a pull tab made of plastic film is attached to its outer surface. At the same time, because tobacco, VCDs, DVDs, and other products are relatively expensive, counterfeit and substandard products are rampant. To achieve anti-counterfeiting purposes, modern printing technologies, such as laser or holographic printing and computer technology, are used to print graphics and text on the pull tab, serving both decorative and anti-counterfeiting functions. Therefore, pull tabs are also called gold pull tabs or anti-counterfeiting pull tabs.

[0003] Currently, existing pull tabs have the following drawbacks: First, most improvements focus on optical effects, microfidelity, odor, and perforation, but these are easily counterfeited, resulting in poor anti-counterfeiting performance and effectiveness, low reliability, and susceptibility to counterfeiting, failing to adequately protect the interests of manufacturers and consumers. Second, existing pull tabs typically involve directly molding the original film layer to form a laser information layer, which often leads to deformation of the original film, affecting the pull tab's aesthetics and packaging quality. Therefore, developing a laser-etched anti-counterfeiting fluorescent pull tab that raises the counterfeiting threshold, offers superior anti-counterfeiting performance, and boasts excellent appearance quality is objectively necessary. Utility Model Content

[0004] The purpose of this utility model is to provide a laser anti-counterfeiting fluorescent pull cord that can raise the threshold for counterfeiting, has good anti-counterfeiting performance, and good appearance quality.

[0005] The purpose of this utility model is achieved as follows: it includes a base film layer and a first corona layer and a second corona layer respectively disposed on both sides of the base film layer. An isolation layer is disposed on the first corona layer, an aluminum plating layer is disposed on the second corona layer, and a color-changing anti-counterfeiting layer is disposed on the aluminum plating layer. The color-changing anti-counterfeiting layer includes a thermochromic fiber layer and anti-counterfeiting ink printing layers located on both sides of the thermochromic fiber layer. The thermochromic fiber layer and the anti-counterfeiting ink printing layers are arranged parallel to each other along the length direction of the base film layer. An adhesive layer is locally dispersed on the color-changing anti-counterfeiting layer. Several metal oxide layers are sequentially disposed on the adhesive layer. The metal oxides in each metal oxide layer are different. A pressure-sensitive self-adhesive layer is disposed on the color-changing anti-counterfeiting layer and the metal oxide layer.

[0006] Furthermore, the anti-counterfeiting ink printing layers on both sides of the thermochromic fiber layer are infrared anti-counterfeiting ink printing layers and ultraviolet anti-counterfeiting ink printing layers, respectively.

[0007] Furthermore, the width of both the thermochromic fiber layer and the anti-counterfeiting ink printing layer is one-third the width of the color-changing anti-counterfeiting layer.

[0008] Furthermore, the number of metal oxide layers is 10 to 25.

[0009] Furthermore, the adhesive layer and the metal oxide layer have a hollow structure.

[0010] Furthermore, the fibers in the thermochromic fiber layer are polypropylene fibers, polyethylene fibers, polyvinyl chloride fibers, acetate fibers, or polyester fibers.

[0011] Furthermore, the adhesive layer and the metal oxide layer are in the form of text or patterns.

[0012] This utility model has the following advantages:

[0013] Firstly, this invention incorporates a color-changing anti-counterfeiting layer, comprising a thermochromic fiber layer and anti-counterfeiting ink printing layers on either side of the thermochromic fiber layer. The thermochromic fiber layer changes color with temperature variations and exhibits repeating color development. The anti-counterfeiting ink printing layers can be printed with infrared or ultraviolet anti-counterfeiting ink. Accordingly, when the infrared anti-counterfeiting ink pull line is illuminated with infrared light, it appears emerald green; when illuminated with ultraviolet light, it appears red. Secondly, this invention also includes several metal oxide layers, each containing different metal oxides. A pre-designed pattern of metal oxides is adhered to the color-changing anti-counterfeiting layer, creating a semi-transparent state. When viewed from different angles, the reflection and interference of light on the different metal oxides produce varying translucent colors. This diverse structure of metal oxide layers can generate numerous different combinations, which are difficult to detect through reverse engineering, resulting in a high level of anti-counterfeiting effectiveness. In summary, this utility model combines a color-changing anti-counterfeiting layer and a metal oxide layer. On the one hand, it can be matched with the transparent film of the product packaging without affecting the packaging effect. On the other hand, it can display microtext or patterns, presenting different colors and interference effects under different angles and light sources. It has a distinctive identity, raises the threshold for counterfeiting, is not easy to be counterfeited, and has good identification and anti-counterfeiting functions.

[0014] Secondly, the base film layer was subjected to double-sided corona treatment, which can increase the surface tension of the base film layer to above 38 dynes and improve the surface adhesion. At the same time, the thermochromic fiber layer and the anti-counterfeiting ink printing layer are both set on the aluminum-plated layer, avoiding the problem of film deformation caused by direct molding and printing on the base film layer, improving the quality of the pull cord, and ensuring the aesthetics of the pull cord and the quality of packaging.

[0015] In summary, this utility model has the advantages of raising the threshold for counterfeiting, having good anti-counterfeiting performance, and good appearance quality. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 2 This is a top view of the metal oxide layer 9 in this utility model.

[0018] In the diagram: 1-base film layer, 2-first corona layer, 3-second corona layer, 4-isolation layer, 5-aluminum plating layer, 6-thermochromic fiber layer, 7-anti-counterfeiting ink printing layer, 8-adhesive layer, 9-metal oxide layer, 10-pressure sensitive self-adhesive layer. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.

[0020] like Figures 1-2 As shown, this utility model includes a base film layer 1 and a first corona layer 2 and a second corona layer 3 respectively disposed on both sides of the base film layer 1. An isolation layer 4 is disposed on the first corona layer 2, and an aluminum plating layer 5 is disposed on the second corona layer 3. A color-changing anti-counterfeiting layer is disposed on the aluminum plating layer 5. The color-changing anti-counterfeiting layer includes a thermochromic fiber layer 6 and anti-counterfeiting ink printing layers 7 located on both sides of the thermochromic fiber layer 6. The thermochromic fiber layer 6 and the anti-counterfeiting ink printing layers 7 are arranged parallel to each other along the length direction of the base film layer 1. An adhesive layer 8 is partially and dispersedly disposed on the color-changing anti-counterfeiting layer. The adhesive layer 8 does not completely cover the color-changing anti-counterfeiting layer, but only covers a part of the color-changing anti-counterfeiting layer. Several metal oxide layers 9 are sequentially disposed on the adhesive layer 8. The metal oxides in each metal oxide layer 9 are different. A pressure-sensitive self-adhesive layer 10 is disposed on the color-changing anti-counterfeiting layer and the metal oxide layers 9.

[0021] The thermochromic fiber layer 6 in this invention incorporates thermochromic substances into fibers. Existing organic solvents that can cause fibers to swell can be used to add infrared multicolor anti-counterfeiting powder, ultraviolet fluorescent powder, liquid crystal thermochromic powder, etc., along with the corresponding fibers. This allows the thermochromic substances to penetrate into the fibers along with the organic solvent. Different thermochromic substances will result in different color changes, and the structure and color changes of the thermochromic fiber layer 6 can be determined according to actual needs.

[0022] This invention incorporates a color-changing anti-counterfeiting layer, comprising a thermochromic fiber layer 6 and anti-counterfeiting ink printing layers 7 located on both sides of the thermochromic fiber layer 6. The thermochromic fiber layer 6 changes color according to temperature variations and exhibits repeating color development. The anti-counterfeiting ink printing layer 7 can be printed with infrared or ultraviolet anti-counterfeiting ink. Accordingly, when the infrared anti-counterfeiting ink pull line is irradiated with infrared light, the pull line appears emerald green; when the ultraviolet anti-counterfeiting ink pull line is irradiated with ultraviolet light, the pull line appears red. Simultaneously, this invention also includes several metal oxide layers, each containing different metal oxides. A pre-designed patterned metal oxide 9 is adhered to the color-changing anti-counterfeiting layer, resulting in a semi-transparent state. When viewed from different angles, the reflection and interference of light on the different metal oxides create different translucent color effects. This diverse structure of metal oxide layers can produce several different combinations, which are difficult to detect through reverse engineering, thus providing a high level of anti-counterfeiting effectiveness. In summary, this utility model combines a color-changing anti-counterfeiting layer and a metal oxide layer 9. On the one hand, it can be matched with the transparent film of the product packaging without affecting the packaging effect. On the other hand, it can display microtext or patterns, presenting different colors and interference effects under different angles and light sources. It has a distinctive identity, raises the threshold for counterfeiting, is not easy to be counterfeited, and has good identification and anti-counterfeiting functions.

[0023] This invention applies double-sided corona treatment to the base film layer 1, which can increase the surface tension of the base film layer 1 to above 38 dynes and improve the surface adhesion. At the same time, the thermochromic fiber layer 6 and the anti-counterfeiting ink printing layer 7 are both set on the aluminum-plated layer 5, avoiding the problem of film deformation caused by directly molding and printing on the base film layer 1, thus improving the quality of the pull cord and ensuring the aesthetics of the pull cord and the quality of packaging.

[0024] Preferably, the anti-counterfeiting ink printing layers 7 on both sides of the thermochromic fiber layer 6 are infrared anti-counterfeiting ink printing layers and ultraviolet anti-counterfeiting ink printing layers, respectively. When the infrared anti-counterfeiting ink pull line is irradiated with infrared light, the pull line turns emerald green, and when the ultraviolet anti-counterfeiting ink pull line is irradiated with ultraviolet light, the pull line turns red.

[0025] Preferably, the width of both the thermochromic fiber layer 6 and the anti-counterfeiting ink printing layer 7 is one-third of the width of the color-changing anti-counterfeiting layer. In actual production, the width ratio of the thermochromic fiber layer 6 and the anti-counterfeiting ink printing layer 7 can be appropriately changed for aesthetics and ease of anti-counterfeiting.

[0026] The metal oxide layer 9 has 10 to 25 layers. This variety of layer counts allows for numerous combinations that are difficult to detect through reverse engineering, resulting in a high level of anti-counterfeiting effectiveness. The specific number of layers can be determined based on anti-counterfeiting requirements. Higher anti-counterfeiting requirements necessitate a higher number of metal oxide layers, while lower requirements allow for a lower number. By designing different numbers and thicknesses of metal oxides, the pull tab can display different colors under varying angles of light reflection, creating transitions between colors and even incorporating polarization detection. This virtually limitless combination of combinations makes it impossible for counterfeiters to replicate or keep up with the evolving pull tab technology, thus enhancing the anti-counterfeiting effect.

[0027] Preferably, the adhesive layer 8 and the metal oxide layer 9 have a hollow structure. The hollow structure has a better visual effect and can present different color effects.

[0028] The fibers in the thermochromic fiber layer 6 are polypropylene fibers, polyethylene fibers, polyvinyl chloride fibers, acetate fibers, or polyester fibers. The thermochromic materials are infrared multicolor anti-counterfeiting powder, ultraviolet fluorescent powder, liquid crystal thermochromic powder, etc. In actual processing, other fibers and thermochromic materials can also be used according to actual needs, as long as they are easy to process and anti-counterfeiting.

[0029] Preferably, the adhesive layer 8 and the metal oxide layer 9 are in the form of text or patterns. The text and patterns can be product-related information for easy labeling and anti-counterfeiting purposes.

Claims

1. A laser anti-counterfeiting fluorescent pull wire, comprising a base film layer (1) and a first corona layer (2) and a second corona layer (3) respectively arranged on both sides of the base film layer (1), characterized in that: An isolation layer (4) is provided on the first corona layer (2), and an aluminum plating layer (5) is provided on the second corona layer (3). A color-changing anti-counterfeiting layer is provided on the aluminum plating layer (5). The color-changing anti-counterfeiting layer includes a thermochromic fiber layer (6) and anti-counterfeiting ink printing layers (7) located on both sides of the thermochromic fiber layer (6). The thermochromic fiber layer (6) and the anti-counterfeiting ink printing layer (7) are arranged parallel to each other along the length direction of the base film layer (1). An adhesive layer (8) is locally dispersed on the color-changing anti-counterfeiting layer. Several metal oxide layers (9) are sequentially provided on the adhesive layer (8). The metal oxides in each metal oxide layer (9) are different. A pressure-sensitive self-adhesive layer (10) is provided on the color-changing anti-counterfeiting layer and the metal oxide layer (9).

2. The laser anti-counterfeiting fluorescent pull wire according to claim 1, characterized in that: The anti-counterfeiting ink printing layers (7) on both sides of the thermochromic fiber layer (6) are infrared anti-counterfeiting ink printing layer and ultraviolet anti-counterfeiting ink printing layer, respectively.

3. The laser anti-counterfeiting fluorescent puller of claim 1, wherein: The width of both the thermochromic fiber layer (6) and the anti-counterfeiting ink printing layer (7) is one-third of the width of the color-changing anti-counterfeiting layer. ​ 4. The laser anti-counterfeiting fluorescent puller of claim 1, wherein: The number of metal oxide layers (9) is 10 to 25.

5. The laser anti-counterfeiting fluorescent puller string according to claim 1, characterized in that: The adhesive layer (8) and the metal oxide layer (9) have a hollow structure.

6. The laser anti-counterfeiting fluorescent puller of claim 1, wherein: The fibers in the thermochromic fiber layer (6) are polypropylene fibers, polyethylene fibers, polyvinyl chloride fibers, acetate fibers, or polyester fibers.

7. The laser anti-counterfeiting fluorescent puller of claim 1, wherein: The adhesive layer (8) and the metal oxide layer (9) are in the form of text or patterns.

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