A three-dimensional dynamic pattern anti-counterfeiting label and a printing method thereof

Abstract

The application discloses a three-dimensional dynamic pattern anti-fake label and a printing method thereof, and relates to the technical field of anti-fake printing. The anti-fake printing method comprises the following steps: printing a layer of light-color UV ink on paper by offset printing, and printing a layer of UV high-light transparent oil on the light-color UV ink to obtain a UV high-light transparent oil layer; printing a dynamic target base pattern on the UV high-light transparent oil layer by UV offset printing to obtain a three-dimensional dynamic pattern base layer; printing mark graphics on the three-dimensional dynamic pattern base layer to form a first anti-fake pattern; spraying high-temperature transparent hot-melt resin on the first anti-fake pattern to form a transparent interval layer; and printing a silk screen microlens array on the transparent interval layer by using transparent UV expansion ink to obtain a second anti-fake pattern with the three-dimensional dynamic pattern.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-counterfeiting printing, in particular to a three-dimensional dynamic pattern anti-counterfeiting label and a printing method thereof. BACKGROUND

[0002] At present, the printing of three-dimensional dynamic pattern anti-counterfeiting is mainly realized by 3D grating film coating technology, but the 3D grating film coating technology is not easy to realize local anti-counterfeiting printing on paper. SUMMARY

[0003] The present application provides a three-dimensional dynamic pattern anti-counterfeiting label and a printing method thereof, aiming to solve the technical problem that the existing 3D grating film coating technology is not easy to realize local anti-counterfeiting printing on paper.

[0004] In order to realize the above technical problem, the first technical solution provided by the present application is as follows: a printing method of a three-dimensional dynamic pattern anti-counterfeiting label, comprising the following steps:

[0005] Offset printing a layer of light color UV ink on paper, and printing a layer of UV high light transparent oil on the top thereof to obtain a layer of UV high light transparent oil;

[0006] Printing a dynamic target base pattern on the top thereof by using UV offset ink to obtain a three-dimensional dynamic pattern base layer;

[0007] Printing a logo graphic on the three-dimensional dynamic pattern base layer to form a first anti-counterfeiting pattern;

[0008] Spraying and printing high-temperature transparent hot melt resin on the first anti-counterfeiting pattern to form a transparent spacing layer;

[0009] Screening micro-lens array printing is performed on the transparent spacing layer by using transparent UV expansion ink to obtain a second anti-counterfeiting pattern with a three-dimensional dynamic pattern.

[0010] Optionally, the target base pattern comprises parallel lines of different lengths.

[0011] Optionally, the printing line width of the parallel lines is 0.05-0.09 mm, and the spacing of the parallel lines is 0.12-0.24 mm.

[0012] Optionally, the micro-lens array comprises the same parallel lines as in the target base pattern.

[0013] Optionally, the printing line width of the micro-lens array is different from that of the target base pattern, and the printing line width of the micro-lens array is 0.06-0.15 mm.

[0014] Optionally, the interval between every two adjacent lines of the microlens array is the same as the interval between every two adjacent lines of the target base line pattern, and is 0.12-0.24 mm.

[0015] Optionally, the thickness of the transparent spacing layer is 0.20-0.25 mm.

[0016] Optionally, the printed line width of the mark is 0.2-0.4 cm.

[0017] Optionally, the high-temperature transparent hot melt resin is PO-polyolefin.

[0018] Optionally, the softening point of the high-temperature transparent hot melt resin is 120-150℃.

[0019] Optionally, the volume expansion rate of the transparent UV expansion ink after curing is 5-7%.

[0020] The second technical solution provided in the present application is a three-dimensional dynamic pattern anti-counterfeiting label prepared by the printing method described above.

[0021] At present, the printing of three-dimensional dynamic pattern anti-counterfeiting is mainly realized by 3D grating film coating technology, but the 3D grating film coating technology is to bond a grating film with relatively hard material and a paper printed with micro-pattern together; in order to avoid the paper part not covered by the grating film being easily damaged, the size of the grating film and the paper needs to be the same size, so the 3D grating film coating technology cannot realize local printing of anti-counterfeiting labels on the paper. In order to realize local anti-counterfeiting printing on the paper, the printing method described in the present application first prints a base line on the ordinary paper with light color UV ink and UV high light transparent ink, and then prints a mark pattern on the base line to obtain a first anti-counterfeiting pattern; in order to increase the flexibility and strength of the anti-counterfeiting label and make it more convenient to fold and carry, the present application further forms a transparent spacing layer on the first anti-counterfeiting pattern by spraying printing high-temperature hot melt adhesive; in order to present a three-dimensional dynamic anti-counterfeiting effect, the present application performs microlens array printing above the transparent spacing layer, the microlens array is composed of parallel lines of different lengths, and the pattern formed is the same as the target base line pattern. It can be seen that based on the principle of microlens, the printing method described in the present application not only realizes the printing of three-dimensional dynamic anti-counterfeiting pattern, but also can realize local printing on the paper. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the concentric circle three-dimensional dynamic pattern anti-counterfeiting label described in Example 1 of the present application;

[0023] Figure 2 It is a schematic diagram of the concentric square three-dimensional dynamic pattern anti-counterfeiting label described in Example 2 of the present application;

[0024] Figure 3A printing process schematic diagram of the three-dimensional dynamic pattern anti-counterfeiting label according to the embodiments of the present application. DETAILED DESCRIPTION

[0025] It should be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application.

[0026] The main solution of the embodiments of the present application is:

[0027] As shown in the printing method of the three-dimensional dynamic pattern anti-counterfeiting label according to the present application, the method comprises the following steps: Figure 3

[0028] S1: printing a layer of light color UV ink on paper by offset printing, and printing a layer of UV highlight transparent oil on the top of the light color UV ink, to obtain a layer of UV highlight transparent oil layer;

[0029] S2: printing a dynamic target base pattern on the top of the UV highlight transparent oil layer by UV offset printing, to obtain a three-dimensional dynamic pattern base layer;

[0030] S3: printing a logo graphic on the three-dimensional dynamic pattern base layer to form a first anti-counterfeiting pattern;

[0031] S4: spraying and printing a high-temperature transparent hot melt resin on the first anti-counterfeiting pattern to form a transparent interval layer;

[0032] S5: printing a silk screen microlens array on the transparent interval layer by using transparent UV expansion ink, to obtain a second anti-counterfeiting pattern with a three-dimensional dynamic pattern.

[0033] In the above anti-counterfeiting printing process, in order to achieve the anti-counterfeiting effect while reducing the thickness of the anti-counterfeiting label, the target base pattern according to the present application comprises parallel lines with different lengths; in some embodiments, the printing line width of the parallel lines in the target base pattern is 0.05-0.09 mm, and the parallel line spacing is 0.12-0.24 mm, such as concentric circles or concentric squares, etc.

[0034] In the above anti-counterfeiting printing process, the logo graphic with a line width of 0.2-0.4 cm is printed on the target base pattern, which is used as an identification of the anti-counterfeiting label without any movement when the viewing angle is switched; and in order to prevent affecting the anti-counterfeiting effect, the printing area of the logo graphic needs to be less than one fifth of the target base pattern. Figure 1 As shown in the figure, the two characters of "JINDING" are the logo graphic described above, and it can be seen that the target base pattern will move with the switching of the viewing angle, but the two characters of "JINDING" will not move at all. Figure 2 In the figure, "JINDING anti-counterfeiting" is the logo graphic described above.

[0035] ​In the above anti-counterfeiting printing process, the transparent interval layer is used to provide a focus change focal length for the movable target base pattern, but the transparent interval layer is prone to degradation or reduced transparency over time during use. Therefore, the high-temperature transparent hot melt resin sprayed on the first anti-counterfeiting pattern is preferably PO-polyolefin. In order to improve the production safety and the temperature resistance of the printed product, the PO-polyolefin with a softening point range of 120-150°C is preferably used.

[0036] In the above anti-counterfeiting printing process, in order to improve the flexibility and strength of the anti-counterfeiting label, thereby making it more convenient to fold and carry, the thickness of the transparent interval layer in the anti-counterfeiting label is 0.20-0.25mm.

[0037] In the above anti-counterfeiting printing process, in order to better present a three-dimensional dynamic anti-counterfeiting effect, the microlens array includes the same parallel lines as the target base pattern, such as when the target base pattern is printed as concentric circles, the printed microlens array is also concentric circles; when the target base pattern is a concentric square, the printed microlens array is also a concentric square.

[0038] In the above anti-counterfeiting printing process, the printed line width of the microlens array is different from the printed line width of the target base pattern, and the printed line width of the microlens array is 0.06-0.15mm; the distance between every two adjacent lines of the microlens array is the same as the distance between every two adjacent lines of the target base pattern, which is 0.12-0.24mm.

[0039] Based on the principle of microlens, in order to ensure that the arc-shaped curing of the ink can complete the first anti-counterfeiting pattern under UV light, and not too fluffy to cause the wear resistance to decrease, in the anti-counterfeiting printing method described in the application, the volume expansion rate of the transparent UV expansion ink after curing is 5-7%.

[0040] It can be seen from the above description that the printing method described in the application is used to realize partial anti-fake printing on paper. First, shallow UV ink and UV high light transparent oil are used for bottom partial printing on ordinary paper, and a first anti-fake pattern is obtained after printing mark graphics on the bottom pattern. In order to increase the flexibility and strength of the anti-fake label and make it more convenient to fold and carry, the application further sprays high-temperature hot melt adhesive on the first anti-fake pattern to form a transparent spacing layer. In order to present a three-dimensional dynamic anti-fake effect, the application performs micro-lens array printing above the transparent spacing layer. The micro-lens array is composed of parallel lines of different lengths, and the pattern formed is the same as the target bottom pattern. At present, the existing technology mainly realizes the printing of three-dimensional dynamic pattern anti-fake through 3D grating film technology. However, the 3D grating film technology is to bond a hard grating film with micro graphics printed on the paper together. In order to avoid damage to the part of the paper that is not covered by the grating film, the size of the grating film and the paper needs to be the same size. Therefore, the 3D grating film technology cannot realize partial printing of anti-fake labels on paper.

[0041] In the following, the application will be described in detail in combination with specific embodiments:

[0042] Embodiment 1

[0043] Step 1: According to the position and size of the anti-fake pattern, a layer of shallow UV ink and a layer of UV high light transparent oil are printed in sequence on the corresponding position of the paper to obtain a UV transparent high light oil layer.

[0044] Step 2: After curing the UV transparent high light oil layer, a plurality of concentric circle lines are printed on the top of the UV transparent high light oil layer using deep color UV offset ink. Each line has the same width of 0.06 mm, and the distance between each two adjacent lines is the same, which is 0.14 mm, to form a three-dimensional dynamic pattern bottom layer of a three-dimensional conical dynamic pattern.

[0045] Step 3: Mark graphics are printed on the three-dimensional dynamic pattern bottom layer to form a complete pattern, that is, a first anti-fake pattern. The printing width of the mark graphics is 0.25 cm, but the printing area should be less than one fifth of the whole pattern, otherwise the anti-fake pattern effect will be affected.

[0046] Step 4: PO-polyolefin with a softening point of 130℃ is sprayed on the first anti-fake pattern to cover the first anti-fake pattern and form a transparent spacing layer. The thickness of the transparent spacing layer is 0.22 mm. The spacing layer provides a focal length change for the dynamic pattern.

[0047] Step 5: transparent UV expansion ink concentric circle line covering screen printing is performed on the transparent interval layer using a 200-250 mesh screen, and the line width of the concentric circle line is adjusted to 0.08 mm during screen printing covering to generate a columnar microlens layer, thereby obtaining the concentric circle three-dimensional dynamic pattern anti-counterfeiting label.

[0048] The schematic diagram of the concentric circle three-dimensional dynamic pattern anti-counterfeiting label of the present embodiment is shown in detail in Figure 1 .

[0049] In order to better present the anti-counterfeiting pattern of the anti-counterfeiting label at different viewing angles, the present application Figure 1 contains three anti-counterfeiting patterns presented by the same anti-counterfeiting label at different viewing angles. For example, Figure 1 the leftmost in the figure is when the anti-counterfeiting label is viewed directly, and the anti-counterfeiting pattern is a concentric circle pattern of different sizes, and the number of anti-counterfeiting patterns is 3; for example, Figure 1 the second from the left in the figure is when the anti-counterfeiting label is viewed at about 120°, and the anti-counterfeiting pattern from inside to outside is a transformed "water drop shape", "heart shape" and "ellipse shape", and the number of anti-counterfeiting patterns is 6-7; for example, the third from the left in the figure is when the anti-counterfeiting label is viewed at about 45°, and the anti-counterfeiting pattern from inside to outside is a transformed "water drop shape", "heart shape" and "half circle shape", and the number of anti-counterfeiting patterns is 5. As can be seen, the anti-counterfeiting label prepared in the present embodiment can present different three-dimensional dynamic anti-counterfeiting effects by changing the viewing angle.

[0050] Example 2

[0051] Step 1: a layer of light color UV ink and a layer of UV high light transparent oil are printed in sequence at the corresponding positions of the paper according to the anti-counterfeiting pattern design position and size to obtain a UV transparent high light oil layer;

[0052] Step 2: after the UV transparent high light oil layer is cured, a plurality of concentric circle lines are printed thereon using dark color UV offset ink, each line has the same width of 0.09 mm, and the distance between every two adjacent lines is the same and is 0.22 mm, so as to form a three-dimensional dynamic pattern base layer generated by a three-dimensional conical dynamic pattern;

[0053] Step 3: a logo graphic is printed on the three-dimensional dynamic pattern base layer to form a complete pattern, thereby obtaining a first anti-counterfeiting pattern; the printing line width of the logo graphic is 0.38 cm, but the printing area thereof should be less than one fifth of the whole pattern, otherwise the anti-counterfeiting pattern effect will be affected;

[0054] Step 4: PO-polyolefin with a softening point of 150°C is sprayed above the first anti-counterfeiting pattern to cover the first anti-counterfeiting pattern, thereby forming a transparent interval layer, and the thickness of the transparent interval layer is 0.22 mm; the interval layer provides a focal length change for the dynamic pattern;

[0055] Step 5: Perform transparent UV expansion ink concentric circle line covering on the transparent interval layer using a 200-250 mesh silk screen, and adjust the line width of the concentric circle line to 0.12 mm during silk screen printing covering to generate a columnar microlens layer, thereby obtaining the concentric circle three-dimensional dynamic pattern anti-counterfeiting label.

[0056] The printed concentric circle three-dimensional dynamic pattern anti-counterfeiting label of the present example has a wider printing line width than the printed label of Example 1, and thus has fewer anti-counterfeiting patterns and a larger moving distance, but can present different three-dimensional dynamic anti-counterfeiting patterns such as “concentric circle”, “water drop”, “heart shape” or “ellipse” and the like along with the change of viewing angle. It can be seen that the anti-counterfeiting label prepared in the present example can present different three-dimensional dynamic anti-counterfeiting effects along with the change of viewing angle.

[0057] Example 3

[0058] Step 1: Print a layer of light color UV ink and a layer of UV high light transparent oil on the paper according to the position and size of the anti-counterfeiting pattern to obtain a UV transparent high light oil layer;

[0059] Step 2: After curing the UV transparent high light oil layer, print a plurality of concentric square lines on the top of the UV transparent high light oil layer using dark color UV offset ink, each line has the same width of 0.08 mm, and the distance between every two adjacent lines is the same and is 0.23 mm, to generate a three-dimensional dynamic pattern base layer formed by a three-dimensional dynamic pattern;

[0060] Step 3: Print a logo graphic on the three-dimensional dynamic pattern base layer to form a complete pattern, thereby obtaining a first anti-counterfeiting pattern; the line width of the logo graphic is 0.25 cm, but the printing area thereof should be less than one fifth of the whole pattern, otherwise the anti-counterfeiting pattern effect will be affected;

[0061] Step 4: Spray PO-polyolefin having a softening point of 125 ℃ on the top of the first anti-counterfeiting pattern to cover the first anti-counterfeiting pattern, thereby forming a transparent interval layer having a thickness of 0.22 mm; the interval layer provides a focal length change for the dynamic pattern;

[0062] Step 5: Perform transparent UV expansion ink concentric square line covering on the transparent interval layer using a 200-250 mesh silk screen, and adjust the line width of the concentric square line to 0.11 mm during silk screen printing covering, and the distance between every two adjacent lines is the same and is 0.23 mm, to generate a columnar microlens layer, thereby obtaining a concentric square three-dimensional dynamic pattern anti-counterfeiting label.

[0063] In order to better present the anti-counterfeiting patterns of the anti-counterfeiting label under different viewing angles, the anti-counterfeiting label of the present application is designed to have a transparent interval layer on the top of the first anti-counterfeiting pattern, and the interval layer is used to provide a focal length change for the dynamic pattern. Figure 2It contains the anti-counterfeiting patterns of the same anti-counterfeiting label under three viewing angles. Figure 2 The left one in the figure shows that when looking up at the anti-counterfeiting label, it can be seen that its anti-counterfeiting pattern is divided into four parts, the upper and lower parts are of the same dimension, and the left and right parts are of another dimension. It can also be seen that the number and shape of small squares in the anti-counterfeiting patterns of the upper and lower parts are different, and the number and distribution of vertical stripes in the left and right parts are also different. Figure 2 The second one from the left is when looking down at the anti-counterfeiting label. It can be seen that its anti-counterfeiting pattern is also divided into four parts. The upper and lower parts are of the same dimension, and the left and right parts are of another dimension. It can also be seen that the number and shape of small squares in the anti-counterfeiting patterns of the upper and lower parts are different, and the number and distribution of vertical stripes in the left and right parts are also different. From the overall point of view, it is different from the anti-counterfeiting label pattern when looking up at the first one from the left. When looking directly at the anti-counterfeiting label, Figure 2 As shown in the third figure from the left, its anti-counterfeiting pattern is also divided into four parts: the upper and lower parts are of the same dimension, and the left and right parts are of another dimension. It can be seen that its anti-counterfeiting pattern is different from the first and second figures from the left in that the upper and lower parts are roughly the same, and the left and right parts are also roughly the same. This shows that the anti-counterfeiting label produced in this embodiment can present different three-dimensional dynamic anti-counterfeiting effects by changing the viewing angle.

[0064] Example 4

[0065] Step 1: Print a layer of light-colored UV ink and a layer of UV high-gloss transparent oil in sequence at the corresponding positions of the paper according to the design position and size of the anti-counterfeiting pattern to obtain a UV transparent high-gloss oil layer;

[0066] Step 2: After curing the UV transparent high gloss oil layer, a plurality of concentric square lines are printed on it using a dark UV offset ink. The width of each line is the same, 0.05 mm, and the spacing between every two adjacent lines is the same, 0.13 mm, to generate a three-dimensional dynamic pattern background layer;

[0067] Step 3: Printing a logo on the three-dimensional dynamic pattern background layer to form a complete pattern, namely, a first anti-counterfeiting pattern; the line width of the logo is 0.36 cm, but its printing area should be less than one-fifth of the entire pattern, otherwise it will affect the anti-counterfeiting effect;

[0068] Step 4: Spraying PO-polyolefin with a softening point of 146° C. on the first anti-counterfeiting pattern to cover the first anti-counterfeiting pattern and form a transparent spacer layer. The thickness of the transparent spacer layer is 0.25 mm. The spacer layer provides a focal length for the dynamic pattern to change.

[0069] Step 5: transparent UV expansion ink concentric square line covering is performed on the transparent interval layer by using a 200-250 mesh screen, the line width of the concentric square line is adjusted to 0.07 mm during screen printing covering, the distance between every two adjacent lines is the same and is 0.15 mm, so as to generate a columnar microlens layer, thereby obtaining the concentric square three-dimensional dynamic pattern anti-counterfeiting label.

[0070] The printed concentric square three-dimensional dynamic pattern anti-counterfeiting label in this embodiment has a finer printing line width during printing compared to the printed anti-counterfeiting label in Embodiment 1, so that the number of the formed anti-counterfeiting patterns is larger and the moving distance is smaller, but different three-dimensional dynamic anti-counterfeiting patterns can be presented along with the change of the viewing angle, the squares in the pattern present a movable state, and when the real object is viewed, it can be obviously seen that the upper and lower patterns and the left and right patterns in the anti-counterfeiting label present a separated state and a three-dimensional visual effect. It can be seen that the anti-counterfeiting label prepared in this embodiment can present different three-dimensional dynamic anti-counterfeiting effects along with the change of the viewing angle.

[0071] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for printing a three-dimensional dynamic pattern anti-counterfeiting label, characterized in that: The following steps are involved: A layer of light-colored UV ink is offset printed on the paper, and a layer of UV high-gloss transparent oil is printed on top to obtain a layer of UV high-gloss transparent oil layer; A dynamic target shading pattern is printed on the surface of the substrate using UV offset ink to obtain a three-dimensional dynamic pattern shading layer; the target shading pattern includes parallel lines of different lengths; the printed line width of the parallel lines is 0.05-0.09 mm, and the spacing between the parallel lines is 0.12-0.24 mm; Then, printing a logo graphic on the three-dimensional dynamic pattern shading layer to form a first anti-counterfeiting pattern; spraying and printing a high-temperature transparent hot-melt resin on the first anti-counterfeiting pattern to form a transparent spacer layer; Printing a screen microlens array on the transparent spacer layer using transparent UV expansion ink to obtain a second anti-counterfeiting pattern having a three-dimensional dynamic pattern; The microlens array includes the same parallel lines as those in the target shading pattern; The printing line width of the microlens array is different from the printing line width of the target shading pattern, and the printing line width of the microlens array is 0.06-0.15 mm.

2. The method for printing a three-dimensional dynamic pattern anti-counterfeiting label according to claim 1, characterized in that: The distance between every two adjacent lines of the microlens array is the same as the distance between every two adjacent lines of the target shading pattern, which is 0.12-0.24 mm.

3. The method for printing a three-dimensional dynamic pattern anti-counterfeiting label according to claim 1, characterized in that: The thickness of the transparent spacer layer is 0.20-0.25 mm.

4. The method for printing a three-dimensional dynamic pattern anti-counterfeiting label according to claim 1, characterized in that: The printing line width of the logo image is 0.2~0.4cm.

5. The method for printing a three-dimensional dynamic pattern anti-counterfeiting label according to claim 1, characterized in that: The high-temperature transparent hot-melt resin is PO-polyolefin.

6. The method for printing a three-dimensional dynamic pattern anti-counterfeiting label according to claim 1, characterized in that: The softening point of the high-temperature transparent hot-melt resin is 120-150°C.

7. The method for printing a three-dimensional dynamic pattern anti-counterfeiting label according to claim 1, characterized in that: The volume expansion rate of the transparent UV expansion ink after curing is 5-7%.

8. A three-dimensional dynamic pattern anti-counterfeiting label, characterized in that: The invention is prepared by the printing method according to any one of claims 1 to 7.

Images