CN109003535B

CN109003535B - Anti-counterfeit label

Info

Publication number: CN109003535B
Application number: CN201810724117.2A
Authority: CN
Inventors: 刘永生; 郭欣; 王学敏; 张雪翼
Original assignee: Shenzhen Nine Stars Printing and Packaging Group Co Ltd
Current assignee: Shenzhen Nine Stars Printing and Packaging Group Co Ltd
Priority date: 2018-07-04
Filing date: 2018-07-04
Publication date: 2020-11-03
Anticipated expiration: 2038-07-04
Also published as: CN109003535A

Abstract

The invention relates to an anti-counterfeit label. An anti-counterfeit label comprises a substrate layer, a color separation layer and an adhesive coating layer. The color separation layer is laminated on the substrate layer and comprises a color separation part and an image-text part, the color separation part is adjacent to the image-text part, and the color separation part contains volatile dye. The sticky coating layer stacked on the color separation layer comprises a first sticky layer and an isolation layer, the first sticky layer has a first color, the first sticky layer is stacked on the color separation layer and completely covers the color separation part, the volatile dye capable of adsorbing the color separation part can form an adsorption area with the color different from the first color, so that the color separation part presents the color different from the image-text part, the projection of the adsorption area on the color separation layer is completely overlapped with the color separation part, and the isolation layer is stacked on one side of the first sticky layer far away from the color separation layer, so that the volatile dye can be prevented from permeating through. The anti-counterfeiting label is difficult to copy and has a strong anti-counterfeiting function.

Description

Anti-counterfeit label

Technical Field

The invention relates to the field of anti-counterfeiting, in particular to an anti-counterfeiting label.

Background

At present, the anti-counterfeiting technology can be divided into first-line anti-counterfeiting and second-line anti-counterfeiting according to the anti-counterfeiting convenience degree. The first-line anti-counterfeiting technology is an anti-counterfeiting technology which can be distinguished and identified by a simple method such as hand feeling or visual inspection without using a special technical instrument by a general consumer, and the second-line anti-counterfeiting technology is an anti-counterfeiting technology which is difficult to identify and can be identified by using a special instrument and equipment. The existing first-line anti-counterfeiting technology is simple in principle, wide in anti-counterfeiting raw material supply, easy to imitate and forge by counterfeiters, and the second-line anti-counterfeiting needs a special tool for identification, is inconvenient and not easy to accept by consumers.

Disclosure of Invention

In view of this, there is a need to provide an easily identifiable security label that is not easily counterfeited.

A security label comprising:

a base layer;

the color separation layer is laminated on the substrate layer and comprises a color separation part and an image-text part, the color separation part is adjacent to the image-text part, and the color separation part contains volatile dye;

the adhesive coating layer stacked on the color separation layer comprises a first adhesive layer and an isolation layer, wherein the first adhesive layer is provided with a first color, the first adhesive layer is stacked on the color separation layer and completely covers the color separation part, the first adhesive layer can adsorb the volatile dye of the color separation part to form an adsorption area with a color different from the first color, so that the color separation part presents a color different from the image-text part, the projection of the adsorption area on the color separation layer is completely superposed with the color separation part, the isolation layer is stacked on one side, away from the color separation layer, of the first adhesive layer, and the isolation layer can prevent the volatile dye from permeating.

In one embodiment, the color separator further includes a base ink having a second color different from the color of the adsorption region, so that the color of the color separator after the volatile dye is volatilized is different from the colors of both the text portion and the adsorption region.

In one embodiment, the material of the first adhesive layer is a transparent colorless material, and the material of the isolation layer is a transparent colorless material.

In one embodiment, a background part is further arranged on one side of the image-text part close to the color separation part, the background part is adjacent to the image-text part and the color separation part and surrounds the color separation part, and the color of the background part is the same as that of the adsorption area.

In one embodiment, the volatile dye is selected from at least one of guaiazulene, guaiazulene derivatives, azo dyes and anthraquinone dyes.

In one embodiment, the anti-counterfeit label further includes a release layer, the release layer is located between the first adhesive layer and the color separation part, and the release layer covers the surface of the color separation part.

In one embodiment, the adhesive layer is provided with discontinuous slits, the slits divide the adhesive layer into a fixed portion and an opening portion, and the projection area of the opening portion on the substrate layer is greater than or equal to the projection area of the color separation portion on the substrate layer.

In one embodiment, the anti-counterfeit label further comprises a second adhesive layer formed on the side of the substrate layer away from the dichroic layer.

In one embodiment, the security label further comprises a release layer completely covering a side of the second adhesive layer remote from the base layer.

A security label comprising:

a base layer;

the color separation layer is laminated on the substrate layer and comprises a color separation part and an image-text part, the color separation part is adjacent to the image-text part, and the color of the color separation part is different from that of the image-text part;

the adhesive coating layer stacked on the color separation layer comprises a first adhesive layer and an isolation layer, wherein the first adhesive layer is provided with an adsorption area, the adsorption area is formed by the first adhesive layer absorbing volatile dye with a color different from that of the first adhesive layer, the projection of the adsorption area on the color separation layer is completely coincided with the color separation part, the isolation layer is stacked on one side, far away from the color separation layer, of the first adhesive layer, and the isolation layer can prevent the volatile dye from penetrating.

The anti-counterfeiting label only comprises an adsorption area with a color different from the first color formed by the first adhesive layer above the color separation part for adsorbing the volatile dye of the color separation part, the first adhesive layer of the rest part still keeps the original color of the first adhesive layer, the volatile dye of the color separation part is volatilized to show the color different from the image-text part, and the projection of the adsorption area on the color separation part is completely coincided with the color separation part. Therefore, the color of the adsorption area formed after the first adhesive layer adsorbs the volatile dye is different from that of the first adhesive layer, and the color separation part is different from that of the image-text part, so that the adsorption area and the color separation part are easily distinguished. The adsorption area formed by the first adhesive layer is completely overlapped with the color separation part, so that no sleeve position error exists, and when a counterfeiter firstly prints the adhesive layer with colors and then realizes the color separation effect on the mounted color separation layer, the dislocation error caused by the deformation of the film layer in the preparation process cannot be avoided. Therefore, the anti-counterfeiting label is easy to identify and is not easy to forge.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of a security tag after printing is completed;

FIG. 2 is a cross-sectional view of the security tag of FIG. 1 after color separation;

FIG. 3 is a cross-sectional view of the security tag of FIG. 2 with a portion of the adhesive layer removed;

FIG. 4 is a cross-sectional view of the security tag of FIG. 3 with the opening portion removed;

FIG. 5 is a top view of the security tag of FIG. 3 with the opening portion removed;

FIG. 6 is a cross-sectional view of another embodiment of a security tag with a portion of the adhesive layer removed;

FIG. 7 is a top view of the security tag of FIG. 6 with a portion of the adhesive layer removed;

FIG. 8 is a top view of the security label of FIG. 6 with a portion of the adhesive layer peeled away;

FIG. 9 is a cross-sectional view of another embodiment of a security tag after color separation;

FIG. 10 is a schematic structural diagram of another embodiment of a security tag;

FIG. 11 is a schematic view of the security tag of FIG. 10 with the opening portion removed;

FIG. 12 is a cross-sectional view of the completed security tag of example 1;

FIG. 13 is a cross-sectional view of the security tag of FIG. 12 after color separation;

fig. 14 is a top view of the security tag of fig. 13 with the opening portion removed.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Some embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 and fig. 2, an embodiment of the security tag 10 includes a substrate layer 110, a dichroic layer 130, and an adhesive layer 150.

The base layer 110 is used to carry the dichroic layer 130. The base layer 110 has good air tightness and can prevent gas molecules from permeating. The material of the substrate layer 110 is selected from polyethylene terephthalate (PET), polyvinyl chloride (PVC), aluminum foil, or a composite material with the above material on the surface. It is understood that in other embodiments, the material of the substrate layer 110 may be other materials with good air tightness.

The dichroic layer 130 is laminated on the surface of the base layer 110. The color separation layer 130 includes a color separation part 131 and a graphic part 132. The color separation section 131 is laminated on the surface of the base layer 110, and the color separation section 131 contains a volatile dye. Specifically, the color separation section 131 is made of color separation ink including a base ink and a volatile dye. Further, the color separation section 131 is printed with color separation ink. In the illustrated embodiment, the color separator 131 has a substantially square shape. Of course, in other embodiments, the color separator 131 is not limited to a square shape, and may have any other shape.

The base ink is a conventional ink, the base ink having a second color, the base ink being non-volatile. Further, the base ink is selected from at least one of any commercially available offset ink (e.g., dark Japanese New golden crown Red ink), gravure ink (e.g., Enmei ENZ-1301 yellow ink), flexo ink (e.g., Adens 2000 series gold ink), and screen ink (e.g., Penta to cav-8100 yellow screen ink).

The volatile dye has good volatility and has a third color. Further, the volatile dye is at least one selected from the group consisting of guaiazulene, a guaiazulene derivative, an azo dye and an anthraquinone dye. Of course, in other embodiments, the volatile dye may also be another dye, as long as it has color and good volatility. It should be noted that the third color referred to herein does not include colorless.

The color separation ink has a color formed by mixing the second color with the third color. In the illustrated embodiment, the second color and the third color are different colors, and in this case, the color separation ink has a color different from both the second color and the third color. Of course, in other embodiments, the second color and the third color may be the same color, and in this case, the color of the color separation ink, the second color and the third color are all the same.

The graphic part 132 is adjacent to the color separation part 131. Further, the graphic part 132 is disposed adjacent to the color separation part 131 and surrounds the color separation part 131. The graphic part 132 has a color different from that of the color separation part after the volatile dye is volatilized. In the illustrated embodiment, the graphic portion 132 is colorless.

The adhesive layer 150 is laminated on the dichroic layer 130. The adhesive layer 150 includes a first adhesive layer 151 and a separator 153.

The first adhesive layer 151 is laminated on the side of the color separation layer 130 away from the substrate layer 110, the first adhesive layer 151 has a first color and can adsorb volatile dyes volatilized by the color separation part 131 to form an adsorption region with a color different from the first color, and the projection of the adsorption region on the color separation layer 130 completely coincides with the color separation part 131.

Further, the first adhesive layer 151 is made of a transparent colorless material, and is colorless and has good transparency, and the first adhesive layer 151 adsorbs the volatile dye with the third color volatilized by the color separation part 131 to form an adsorption region. At this time, the color of the color separation part 131 is different from that of the graphic part 132 due to the volatilization of the volatile dye.

Further, the color separation section 131 exhibits the second color of the base ink due to the volatilization of the volatile dye. Further, the material of the first adhesive layer 151 is selected from at least one of acrylic resin, pressure sensitive adhesive, polyurethane, and shadowless adhesive.

Of course, in other embodiments. The material of the first adhesive layer 151 may also be an adhesive material having another color, as long as the first adhesive layer 151 can adhere the dichroic layer 130 and the separation layer 150, and the color after adsorbing the volatile dye is different from the first color, so as to distinguish the boundary between the adsorption region and the adjacent other region. It is understood that the color of the adsorption region may be the same as the color of the color separation part 131 after the volatile dye is volatilized, as long as the color of the region adjacent to the adsorption region is different from the color of the adsorption region, and the color of the color separation part 131 after the volatile dye is volatilized is different from the color of the text region 132, as long as the adsorption region and the color separation part after the volatile dye is volatilized can be identified. Of course, the color of the adsorption region is different from the color separation part 131 after the volatile dye is volatilized, so that the adsorption region and the color separation part after the volatile dye is volatilized can be more conveniently identified.

In other embodiments, the volatile dye may be heated and baked to accelerate the volatile dye to be absorbed by the first adhesive layer 151, so as to form an absorption region with a color different from the first color.

The separation layer 153 is stacked on a side of the first adhesive layer 151 away from the dichroic layer for preventing the volatile dye from permeating therethrough.

Further, the material of the isolation layer 153 is a transparent colorless material, which is colorless and has good transparency. Further, the material of the isolation layer 153 is a PET film or a PVC film. Of course, in other embodiments, the isolation layer 153 may also be other materials with good air tightness.

Referring to fig. 3, 4 and 5, when the anti-counterfeit label 10 is used, a part of the adhesive layer 150 is peeled off from the color separation part 131, and it can be seen that the first adhesive layer 151 forms an absorption region with a color different from the first color due to the absorption of the volatile dye, and the projection of the absorption region on the color separation layer 130 completely coincides with the color separation part 131.

Of course, if the adhesive layer 150 laminated on the color separation part 131 is made of a transparent colorless material and the first adhesive layer is also made of a transparent colorless material, the color of the color separation part 131 is observed to be a mixed color of the second color and the third color directly through the adhesive layer 150 without peeling off the adhesive layer 150 on the color separation part 131, the adsorption region observed after peeling off the adhesive layer 150 above the color separation part is a third color, the color separation part 131 is a color different from the graphic part 132, and further, when the volatile dye is completely volatilized, the color separation part is a second color.

In some embodiments, the security tag 10 further comprises a second adhesive layer 180. The second adhesive layer is formed on a surface of the substrate layer 110 away from the dichroic layer 130. For attaching the security tag to the product. The second adhesive layer 180 is at least one selected from acrylic resin, pressure sensitive adhesive, and polyurethane. Of course, in other embodiments, the material of the second adhesive layer 180 may also be other materials with adhesive force.

In some embodiments, the above-mentioned security label 10 further comprises a release layer 190, wherein the release layer 190 completely covers a side surface of the second adhesive layer 180 away from the substrate layer. The release layer 190 serves to protect the second adhesive layer 180. The peeling layer 190 is selected from one of cellophane and paper coated with silicone oil. Of course, it is understood that in other embodiments, the release layer 190 may be other materials that facilitate release.

The anti-counterfeit label 10 at least has the following advantages:

(1) only the first adhesive layer 151 above the color separation part 131 forms an adsorption area with a color different from that of the first adhesive layer 151 due to the adsorption of volatile dyes, the rest of the first adhesive layer 151 still keeps the original first color, the color of the adsorption area is different from that of the first adhesive layer 151, the area where the adsorption area is located is easily defined, the color of the color separation part 131 is different from that of the image-text part 132 at the moment, the area where the color separation part 131 is located is easily defined, the projection of the adsorption area on the color separation layer 130 is completely overlapped with the color separation part 131, and no registration error exists. When a counterfeiter realizes the color separation effect by printing the colored adhesive layer and then mounting the color separation layer 130, the dislocation error caused by the deformation of the film layer in the preparation process cannot be avoided. Therefore, the counterfeit deterrent label 10 is easily identifiable and is not easily counterfeited.

(2) The first adhesive layer 151 and the isolation layer 153 are both transparent colorless materials, and the color separation part 131 is observed to be in a color formed by mixing the second color and the third color directly through the adhesive layer 150, after the first adhesive layer 151 adsorbs the volatile dye, the adhesive layer 150 is uncovered, the adsorption area presents a color different from that of the first adhesive layer 151, and the color separation part 131 presents the second color or the color of the color separation part 131 is between the second color and the third color but is different from that of the image-text part. It should be noted that the color of the color separation portion can be between the second color and the third color due to the volatile dye portion having the third color.

(3) The second adhesive layer 180 facilitates the attachment of the security tag 10 to the surface of an object during use.

(4) The release layer 190 can protect the second adhesive layer.

Referring to fig. 6, 7 and 8, a counterfeit label 20 according to another embodiment has substantially the same structure as the counterfeit label 10, except that a discontinuous slit 255 is further formed on an adhesive layer 250 of the counterfeit label 20, the slit 255 divides the adhesive layer 250 into a fixed portion and an open portion, and a projection area of the open portion on the base layer 210 is greater than or equal to a projection area of the color separation portion 231 on the base layer 210. The adhesive layer 250 is divided into a fixed part and an opening part by the arrangement of the slit 255, so that the adhesive layer 250 can be locally uncovered to observe the color separation effect, and on the other hand, the slit 255 can prevent the volatile dye with violent molecular motion from diffusing to the periphery through the molecular motion, and the negative influence of the volatile dye on the first adhesive layer caused by diffusion is weakened.

The color separation layer 230 of the security label 20 further comprises a background portion 233, and the color of the background portion 233 is different from the color of the image-text portion 132 and the color of the color separation portion 131 after the volatile dye is volatilized, but is the same as the color of the adsorption area. The background portion 233 is laminated on the surface of the base layer 210, and the background portion 233 is provided so as to surround the color separation portion 231, in contact with the color separation portion 231 and the graphics portion. The width of the background portion 233 is 0.05mm to 5 mm. In the illustrated embodiment, the background portion 233 has a substantially band shape. The background portion 233 has the same color as the adsorption region, and after the volatile dye is volatilized and adsorbed by the first adhesive layer, the volatile dye diffuses to some extent, particularly the volatile dye that is easily diffused, on the first adhesive layer due to molecule migration, and at this time, due to the existence of the background portion 233 and the discontinuous slits 255, the color separation portion 231 of the forgery-preventing label 20 is viewed through the isolation layer, and the visual effect of the color separation portion 231 is not weakened due to the diffusion of the volatile dye.

The above-described security tag 20 has substantially the same structure as the security tag 10, and therefore, has similar effects to the security tag 10. In addition, the method has the following advantages:

(1) the background portion 233 is provided to reduce an edge blurring phenomenon caused by a volatile dye that is easily diffused when the color separation layer is observed through the adhesive layer 250, and improve a visual effect.

(2) The adhesive layer 250 is provided with discontinuous slits 255, so that on one hand, the opening part of the adhesive layer 250 is conveniently stripped from the color separation part 231, on the other hand, the diffusion of the volatile dye which is easy to diffuse can be weakened, and the negative influence caused by the diffusion of the volatile dye is reduced.

Referring to fig. 9, another embodiment of a security tag 30 is substantially the same as the security tag 20, except that the security tag 30 further includes a de-adhesive layer 370. The anti-sticking layer 370 is located between the first adhesive layer 351 and the color separation portion 331, the anti-sticking layer 370 covers the surface of the color separation portion 331 to reduce the adhesive force of the first adhesive layer above the color separation portion 331, and the anti-sticking layer 370 can allow the volatile dye to penetrate through.

Further, the material of the debonding layer 370 is a transparent colorless material, which is colorless and has good transparency. Further, the material of the debonding layer 370 is selected from at least one of polyvinyl alcohol, silicone oil, silicone grease, and emulsified paraffin. Of course, in other embodiments, the material of the de-sticking layer 370 may be other materials that allow the transmission of volatile dyes and have reduced adhesion.

The above-described security tag 30 has substantially the same structure as the security tag 20, and therefore, has similar effects to those of the security tag 20. In addition, the adhesion of the first adhesive layer 351 can be reduced, which facilitates the separation of the first adhesive layer 351 and the color separation part 331.

Referring to fig. 10 and 11, another embodiment of a security label 40 is substantially the same as the security label 30, except that the security label 40 further includes an actuating member 420, the actuating member 420 is connected to an edge of the adhesive layer 450, and the actuating member 420 can drive the adhesive layer 450 to move away from the color separation portion 431, so that the absorption area is visible. The provision of the actuator 420 facilitates opening of the adhesive layer 450 over the color separation portion 431.

The above-mentioned antifalsification label 40 is roughly the same with the structure of antifalsification label 30, therefore also has the similar effect of antifalsification label 30, in addition, still has starting member 420, does benefit to and opens the coating 450 of gluing above colour separation portion 431 for antifalsification label 40 uses more conveniently.

Another embodiment of a security tag comprises:

a base layer;

the adhesive coating stacked on the color separation layer comprises a first adhesive layer and an isolation layer, wherein the first adhesive layer is provided with an adsorption area, the adsorption area is formed by absorbing volatile dye with a color different from that of the first adhesive layer by the first adhesive layer, the projection of the adsorption area on the color separation layer is completely overlapped with the color separation part, the isolation layer is stacked on one side, away from the color separation layer, of the first adhesive layer, and the isolation layer can prevent the volatile dye from penetrating through the isolation layer.

The following description will be given with reference to specific examples.

Example 1

The forgery-preventing label 50 of embodiment 1 has a structure including a base layer 510, a dichroic layer 530, an adhesive layer 550, a release layer 570, a second adhesive layer 580, and a release layer 590, as shown in fig. 12 to 14.

Wherein the base layer 510 is PET.

The color separation layer 530 is stacked on the surface of the substrate layer 510, and includes a color separation portion 531, an image-text portion and a background portion 533, wherein the background portion 533 is adjacent to the color separation portion 531 and the image-text portion, and is disposed around the color separation portion 531. The color separation section 531 is printed with color separation ink, which is a mixture of base ink and guaiazulene blue. The base ink is dark Japanese golden crown red ink which is red (second color), the guaiazulene is blue (third color), and the color separation ink is purple. The image-text part is transparent and colorless. The background portion 533 is printed with dark day new golden crown blue ink, the background portion 533 is blue, and the width of the background portion 533 is 0.5 mm.

The anti-adhesive layer 570 is laminated on a surface of the color separation part 531 away from the base layer 510, and the anti-adhesive layer 570 is silicone oil and is transparent and colorless.

The adhesive layer 550 is transparent and colorless, a part of the adhesive layer 550 is laminated on a side surface of the graphic part away from the substrate layer 510, another part is laminated on a side surface of the adhesive layer 570 away from the color separation part 531 and completely covers the color separation part 531, the adhesive layer 550 comprises a first adhesive layer 551 and an isolation layer 553, a part of the first adhesive layer 551 is laminated on a side surface of the graphic part away from the substrate layer 510, and another part is laminated on a side surface of the adhesive layer 570 away from the color separation part 531 and completely covers the color separation part 531. The spacer 553 is laminated on the side of the first adhesive layer 551 remote from the dichroic layer 530. The first adhesive layer 551 is acrylic resin, and the spacer layer 553 is a PET film. The adhesive layer 550 is provided with discontinuous slits 555, the slits 555 divide the adhesive layer 550 into a fixed portion and an opening portion, and the projection area of the opening portion on the substrate layer 510 is larger than the projection area of the color separation portion 531 on the substrate layer 510.

The second adhesive layer 580 is formed on a surface of the substrate layer 510 away from the dichroic layer 530, and the second adhesive layer 580 is a pressure sensitive adhesive.

The release layer 590 is formed on a side of the second adhesive layer 580 away from the substrate layer 510 and completely covers a side of the second adhesive layer 580 away from the substrate layer 510, and the release layer 590 is cellophane.

The forgery prevention label 50 of example 1 is purple when the color separation part 531 is viewed through the transparent spacer 553. After a period of time, the guaiazulene in the color separation portion 531 gradually volatilizes, the transparent colorless first adhesive layer absorbs the guaiazulene volatilized by the color separation portion 531 through the adhesive removing layer 570 to form an absorption region, the absorption region is blue, the color of the color separation portion 531 is changed from purple to red possessed by the base ink after the guaiazulene is lost, at this time, the color seen through the isolation layer 553 is still purple, and the appearance color of the anti-counterfeit label 50 is not changed. When the anti-counterfeit label is used, the edge of the anti-counterfeit label 50 is lightly scratched, the opening part of the adhesive layer 550 is easily peeled off from the color separation part 531 of the dichroic layer 530 due to the adhesive removing layer 570 and the slit 555, after the opening part is separated from the color separation part 531, the blue absorption area and the red color separation part 531 can be seen, and the projection of the blue absorption area on the dichroic layer 530 is completely overlapped with the red color separation part 531.

The security label 50 of embodiment 1 only has the first adhesive layer 551 located above the dichroic portion 531 to form blue due to absorption of guaiazulene, the remaining portion of the first adhesive layer 551 is still transparent and colorless, the dichroic portion changes from purple to red, which is different from the transparent and colorless image-text portion, the projection of the absorption region on the dichroic layer 530 completely coincides with the red dichroic portion 531, and there is no registration error between the absorption region formed by the first adhesive layer 551 and the dichroic portion 531. The label is easy to identify and has good anti-counterfeiting performance.

Example 2

The security label of example 2 was colored green in color components observed through the spacer, and the security label of example 2 was substantially the same in structure as the security label of example 1, except that the base ink of this example was engme 1301 yellow ink, which was colored yellow, and the color separation ink was colored green.

Example 3

The color separation part of the security label of example 3 observed through the isolation layer is blue-gold, and the structure of the security label of example 3 is substantially the same as that of the security label of example 1, except that the basic ink of this embodiment is alloy 2000 series gold ink, which is gold, and the color separation ink is blue-gold.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A security label, comprising:

a base layer;

2. The security tag of claim 1 wherein the color separation portion further comprises a base ink having a second color different from the color of the absorbing region such that the color of the color separation portion after the volatile dye is volatilized is different from both the image portion and the absorbing region.

3. The security label according to claim 2, wherein the material of the first adhesive layer is a transparent colorless material, and the material of the isolation layer is a transparent colorless material.

4. The antifalsification label according to claim 3, wherein a background part is further provided on a side of the image-text part adjacent to the color separation part, the background part is adjacent to both the image-text part and the color separation part and surrounds the color separation part, and the color of the background part is the same as the color of the adsorption area.

5. The security label according to claim 1, wherein the volatile dye is at least one selected from the group consisting of guaiazulene, guaiazulene derivatives, azo dyes and anthraquinone dyes.

6. The security label according to claim 1, further comprising a tack-free layer between the first adhesive layer and the color separation portion, the tack-free layer covering a surface of the color separation portion.

7. The anti-counterfeit label according to claim 1, wherein the adhesive layer is provided with discontinuous slits, the slits divide the adhesive layer into a fixed portion and an opening portion, and a projected area of the opening portion on the base layer is greater than or equal to a projected area of the color separation portion on the base layer.

8. The security label of claim 1 further comprising a second adhesive layer formed on a side of the base layer away from the dichroic layer.

9. The security label of claim 8 further comprising a release layer completely covering a side of the second adhesive layer remote from the base layer.

10. A security label, comprising:

a base layer;