A multi-layer dynamic anti-counterfeiting film and its preparation and application

Abstract

The present invention provides a multi-layer dynamic anti-counterfeiting film and its preparation and application, relating to the field of packaging anti-counterfeiting. The film comprises an upper layer, a lower layer, and a middle layer. Both the upper and lower layers are optically transparent polymer films, while the middle layer comprises a channel structure layer formed by curing a photosensitive polymer and having interconnecting channels. Compared to traditional single-label, material, and digital anti-counterfeiting methods, this film incorporates fluid into its anti-counterfeiting function, forming a dynamic composite anti-counterfeiting technology with broad application prospects in the field of valuable commodity packaging.

Description

Technical Field

[0001] The present invention belongs to the field of packaging anti-counterfeiting, and in particular relates to a multi-layer dynamic anti-counterfeiting film and a preparation and application thereof. Background Art

[0002] With the rapid rise of awareness of intellectual property protection in my country, companies are significantly increasing their investment in combating piracy and counterfeiting. Traditional packaging anti-counterfeiting technologies primarily rely on innovative packaging designs, such as adding special labels or materials to packaging materials, or even using special materials directly as the packaging substrate. However, their effectiveness depends on companies maintaining their technological advantage over counterfeiters. In the face of increasingly sophisticated counterfeiting techniques, a growing number of emerging technologies are being explored in the field of packaging anti-counterfeiting to maintain their effectiveness.

[0003] The current mainstream packaging anti-counterfeiting technologies can be roughly divided into three categories: label anti-counterfeiting, material anti-counterfeiting, and digital anti-counterfeiting. Label anti-counterfeiting is the current mainstream packaging anti-counterfeiting technology. It achieves product anti-counterfeiting verification by producing high-tech anti-counterfeiting labels and verifying whether the product has a label or the authenticity of the label. Its effectiveness is based on the premise that the preparation technology of the anti-counterfeiting label itself cannot be cracked. Material anti-counterfeiting can be simply understood as the addition of materials that exhibit specific physical and chemical properties under special conditions into the packaging material, mainly anti-counterfeiting inks, and specific excitation methods include optical color change, infrared excitation, ultraviolet excitation, temperature sensitivity, pressure sensitivity, etc. Digital anti-counterfeiting, also known as digital anti-counterfeiting technology, is a general term for comprehensive anti-counterfeiting technologies based on computers, information coding, network communications and other technologies. The above three types of packaging anti-counterfeiting technologies are all static anti-counterfeiting technologies. There is currently no dynamic anti-counterfeiting technology that can be applied industrially on the market. Summary of the Invention

[0004] The purpose of this invention is to develop a multi-layer dynamic anti-counterfeiting film, its preparation, and its application. Compared to traditional single-label, material, and digital anti-counterfeiting methods, this multi-layer dynamic anti-counterfeiting film incorporates fluid into its anti-counterfeiting function, forming a dynamic composite anti-counterfeiting technology with broad application prospects in the field of high-value commodity packaging.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides a multi-layer dynamic anti-counterfeiting film, which is composed of a three-layer structure consisting of an upper layer, a lower layer, and a middle layer. The upper layer and the lower layer are both made of polymer films with optically transparent properties, and the middle layer is a channel structure layer with a connecting channel structure formed by curing a photosensitive polymer.

[0007] Preferably, the upper layer and the lower layer are made of one or more of polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).

[0008] Preferably, colored ink is injected into the channel structure of the intermediate layer, and anti-counterfeiting verification is performed based on the flow process of the colored ink in the channel structure.

[0009] Preferably, a color developer solution with a color development reaction is injected into the channel structure of the intermediate layer and dried. When anti-counterfeiting verification is to be performed, a chemical solution that can undergo a color development reaction with the color developer is injected into the channel structure of the intermediate layer, and anti-counterfeiting verification is performed based on the occurrence of the color development reaction in the channel structure.

[0010] In a second aspect, the present invention provides an apparatus for preparing the multi-layer dynamic anti-counterfeiting film, comprising:

[0011] a first fixed shaft for placing a lower polymer film;

[0012] a first oxygen plasma device for performing oxygen plasma treatment on the upper surface of the lower polymer film;

[0013] a first pulling roller for pulling the lower polymer film below the spray gun;

[0014] A spray gun for spraying glue on the upper surface of the lower polymer film to form a glue layer;

[0015] A master mold for forming a channel structure layer by pressing the glue layer;

[0016] an ultraviolet lamp for irradiating the lower polymer film having the channel structure layer with ultraviolet light;

[0017] a second fixed shaft for placing an upper polymer film;

[0018] a second oxygen plasma device for performing an oxygen plasma treatment on the lower surface of the upper polymer film;

[0019] a second pulling roller for pulling the upper polymer film to the scraper;

[0020] A scraper used to remove bubbles from the outside of the multi-layer film and to fix the multi-layer film;

[0021] a third pulling roller for pulling the multilayer film to a subsequent process;

[0022] The first fixed shaft, the first oxygen plasma device, the first pulling roller, the spray gun, the mother mold, the scraper, and the third pulling roller are arranged in sequence along the conveying direction of the lower polymer film, and an ultraviolet lamp is arranged under the mother mold. The second fixed shaft, the second oxygen plasma device, and the second pulling roller are arranged in sequence above between the mother mold and the scraper along the conveying direction of the upper polymer film.

[0023] In a third aspect, the present invention provides a method for preparing the multi-layer dynamic anti-counterfeiting film, the specific steps of which are as follows:

[0024] (1) After cleaning the upper surface of the lower polymer film with clean nitrogen, the lower polymer film is treated with oxygen plasma. The lower polymer film is then passed through a single discharge electrode with a voltage of 7 kV at a speed of 100-200 m / min to make the dyne value of the lower polymer film surface reach 40-60 dyn / cm. The next step is performed within 2 minutes after the treatment is completed.

[0025] (2) Use the photosensitive adhesive diluted with acetone as the main body of the adhesive layer, with a dilution ratio of 2:1, and use a spray gun to evenly spray it on the lower polymer film. The spraying amount is (1-5)×10 -3 ml / cm 2 ;

[0026] (3) The master mold with the channel structure is vertically pressed on the surface of the lower polymer film after spraying, with a pressure range of 0.04 to 0.2 N / cm 2 , and after continuously irradiating the master mold with ultraviolet light of 350nm wavelength for 60s, a film with a certain viscosity and a channel structure layer on the surface was obtained;

[0027] (4) After the lower surface of the upper polymer film is cleaned with clean nitrogen, it is treated with oxygen plasma. Then, the upper polymer film is passed through a single discharge electrode with a voltage of 7KV at a speed of 100-200m / min to make the dyne value of the film surface reach 40-60dyn / cm. Within 2 minutes after the treatment is completed, the upper polymer film is covered on the channel structure layer treated in step (3). A scraper is used to scrape the multi-layer film from one side to the other to achieve the removal of bubbles and the fixation of the structure, thereby completing the processing of the multi-layer dynamic anti-counterfeiting film.

[0028] Preferably, in step (3), the channel structure of the master mold is at least one of a simplified interconnected pattern of the product company's trademark, a complex partially interconnected matrix, a barcode with digital information, a QR code pattern, and a Roman numeral pattern of the product production date.

[0029] Preferably, the method further includes injecting colored ink into the channel structure of the intermediate layer.

[0030] Preferably, the method further includes the steps of injecting a developer solution having a color development reaction into the channel structure of the intermediate layer and drying the solution.

[0031] In a fourth aspect, the present invention provides an application of the multi-layer dynamic anti-counterfeiting film, comprising:

[0032] (1) It is used as outer packaging to cover the outer surface of the product.

[0033] (2) It can be made into an anti-counterfeiting patch or anti-counterfeiting label for use alone.

[0034] In the fifth aspect, the present invention provides a verification method for the above-mentioned multi-layer dynamic anti-counterfeiting film, including: injecting colored ink into the intermediate layer channel structure, performing anti-counterfeiting verification according to the flow process of the colored ink in the channel structure, or injecting a color developer solution with a color development reaction into the intermediate layer channel structure in advance and drying it, and when performing anti-counterfeiting verification, injecting a chemical solution that can produce a color development reaction into the intermediate layer channel structure, and performing anti-counterfeiting verification according to the occurrence of the color development reaction in the channel.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The multi-layer dynamic anti-counterfeiting film prepared by the present invention uses fluid flow as an anti-counterfeiting verification method for the first time, forming a dynamic anti-counterfeiting technology for packaging that can be industrially applied.

[0037] 2. The materials used in the multi-layer dynamic anti-counterfeiting film of the present invention are all common materials in the packaging field, with a high degree of marketization and mature and stable material properties. When applied in batch industrialization, it helps to reduce production costs, improve product quality and market competitiveness, has high technical feasibility, has significant technical advantages, and is easy to promote.

[0038] 3. The fluid dynamic anti-counterfeiting method proposed in the present invention provides a new technical route for packaging anti-counterfeiting technology. Compared with traditional single label anti-counterfeiting, material anti-counterfeiting and digital anti-counterfeiting, this method introduces fluid into the film anti-counterfeiting function, forming a dynamic composite anti-counterfeiting technology. It has broad application prospects in the field of precious commodity packaging, and also helps to promote the development of composite anti-counterfeiting technology on the basis of combining with existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a device for preparing a multi-layer dynamic anti-counterfeiting film of the present invention;

[0040] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle mother mold;

[0041] Figure 3 This is a schematic diagram of the operation of a device for preparing a multi-layer dynamic anti-counterfeiting film according to the present invention;

[0042] Figure 4 This is a schematic diagram of the processing principle of a multi-layer dynamic anti-counterfeiting film of the present invention;

[0043] Figure 5 This is a structural diagram of a multi-layer dynamic anti-counterfeiting film of the present invention;

[0044] Reference numerals: 1-first fixed shaft, 2-first oxygen plasma equipment, 3-first pulling roller, 4-spray gun, 5-mother mold, 6-ultraviolet lamp, 7-second fixed shaft, 8-second oxygen plasma equipment, 9-second pulling roller, 10-scraper, 11-third pulling roller. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments.

[0046] Example 1

[0047] Please see the attached Figure 1-5 As shown, the present embodiment provides a preparation device for a multi-layer dynamic anti-counterfeiting film, comprising a first fixed shaft, a first oxygen plasma device, a first pulling roller, a spray gun, a mother mold, a scraper, and a third pulling roller, which are sequentially arranged along the conveying direction of the lower polymer film, an ultraviolet lamp is arranged below the mother mold, and a second fixed shaft, a second oxygen plasma device, and a second pulling roller are sequentially arranged above the mother mold and the scraper along the conveying direction of the upper polymer film, wherein the first fixed shaft is used to place the lower polymer film, and the first oxygen plasma device is used to perform oxygen plasma treatment on the upper surface of the lower polymer film; the first pulling roller is used to pull the lower polymer film to the bottom of the spray gun; the spray gun is used to spray glue on the upper surface of the lower polymer film to form a glue layer, the second fixed shaft is used to place the upper polymer film, the second oxygen plasma device is used to perform oxygen plasma treatment on the lower surface of the upper polymer film, the second pulling roller is used to pull the upper polymer film to the scraper, the mother mold is used to press the glue layer to form a channel structure layer, the ultraviolet lamp is used to irradiate the lower polymer film with ultraviolet light, the scraper is used to scrape off bubbles on the outside of the multilayer film and fix the multilayer film; the third pulling roller is used to pull the multilayer film to the subsequent process.

[0048] The multi-layer dynamic anti-counterfeiting film preparation device of this embodiment is used to prepare the multi-layer dynamic anti-counterfeiting film:

[0049] The upper surface of the lower polymer film was cleaned with clean nitrogen and placed on the first fixed shaft 1. The upper surface of the lower polymer film was treated with oxygen plasma using the first oxygen plasma device 2. The lower polymer film was passed through a single discharge electrode with a voltage of 7KV at a speed of 155m / min to make the dyne value of the film surface reach 44dyn / cm. The next step was carried out within 2 minutes after the treatment was completed. Under the action of the first pulling roller 3, the lower polymer film quickly came under the spray gun 4. Acetone-diluted photosensitive adhesive was used as the adhesive layer body and was evenly sprayed on the lower polymer film using the spray gun 4. The spraying amount was 2×10 -3 ml / cm 2The master mold 5 with the channel structure is vertically pressed on the surface of the lower polymer film after spraying, with a pressure range of 0.04 to 0.2 N / cm 2 After continuously receiving ultraviolet irradiation with a wavelength of 350nm emitted by the ultraviolet lamp 6 for 60s, the master mold 5 is removed to obtain a film with a certain viscosity having a channel structure layer on the surface; the lower surface of the upper polymer film is cleaned with clean nitrogen and then fixed on the second fixed shaft 7, and the second oxygen plasma equipment 8 is used to perform the oxygen plasma treatment as described above, and the upper polymer film is passed through a single discharge electrode with a voltage of 7KV at a speed of 155m / min, so that the dyne value of the surface of the upper polymer film reaches 44dyn / cm. Within 2 minutes after the treatment is completed, the upper polymer film is pulled by the second traction roller 9 to cover the channel structure layer, and the scraper 10 is used to scrape from one side of the multi-layer film to the other side to achieve the removal of bubbles and fixation of the structure, completing the processing of the multi-layer dynamic anti-counterfeiting film structure, and the assembled multi-layer dynamic anti-counterfeiting film is transported to subsequent shearing, packaging and other equipment under the traction of the third traction roller 11.

[0050] The method for anti-counterfeiting verification of the multi-layer dynamic anti-counterfeiting film prepared in this embodiment is as follows: an opening is taken at each end of the middle layer channel structure, and the width is consistent with the width of the middle layer channel structure. Colored ink is dripped at one end, and the droplets must cover the size of the opening. An exhaust device, such as a syringe, is used at the opening at the other end to extract the air in the middle layer channel structure, thereby realizing negative pressure suction of the colored ink at the other end, and anti-counterfeiting verification is performed based on the flow process of the colored ink in the channel structure.

[0051] Example 2

[0052] Based on the multi-layer dynamic anti-counterfeiting film prepared in Example 1, an opening is taken at each end of the middle layer channel structure, and the width is consistent with the width of the middle layer channel structure. Phenolphthalein reagent is added at one end, and the droplets must cover the size of the opening. An exhaust device, such as a syringe, is used at the opening at the other end to extract the air in the middle layer channel structure to achieve negative pressure suction of the phenolphthalein reagent at the other end. When the phenolphthalein reagent fills the entire middle layer channel structure, the operation is stopped and the entire film is dried.

[0053] The method for anti-counterfeiting verification of the multi-layer dynamic anti-counterfeiting film prepared in this embodiment is as follows: alkaline water is added dropwise to one of the openings, and the droplet must cover the size of the opening. A syringe is used at the opening at the other end to extract the air in the middle layer channel structure to achieve negative pressure suction of alkaline water at the other end. It can be observed that the microstructure channel through which the alkaline water flows appears pink, until the alkaline water passes through the entire microstructure channel, the designed pattern turns red, and the verification is completed.

[0054] Example 3

[0055] Different from the first embodiment, the middle layer channel structure of this embodiment is injected with colored ink but is not filled up.

[0056] During anti-counterfeiting verification, the anti-counterfeiting verification of the multi-layer dynamic anti-counterfeiting film can be achieved by directly observing the flow process of the colored ink in the channel structure.

[0057] The openings at both ends of the intermediate layer channel structure in the present invention can be sealed with adhesive or micro plugs.

[0058] The above is merely an embodiment of the present invention, and its description is relatively specific and detailed, but it should not be understood as limiting the scope of the present invention. It should be pointed out that those skilled in the art can make a number of modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A multi-layer dynamic anti-counterfeiting film, characterized by: The multi-layer dynamic anti-counterfeiting film is composed of an upper layer, a lower layer, and a middle layer. The upper and lower layers are both made of optically transparent polymer films. The middle layer is a channel structure layer with interconnected channel structures formed by curing photosensitive polymer. A dry color developer with a color-developing reaction is injected into the channel structure of the middle layer. The specific steps of the multi-layer dynamic anti-counterfeiting film are as follows: (1) After cleaning the upper surface of the lower polymer film with clean nitrogen, the lower polymer film is treated with oxygen plasma. The lower polymer film is then passed through a single discharge electrode with a voltage of 7 kV at a speed of 100-200 m / min to make the dyne value of the lower polymer film surface reach 40-60 dyn / cm. The next step is carried out within 2 minutes after the treatment is completed. (2) Use the photosensitive adhesive diluted with acetone as the main body of the adhesive layer, the dilution ratio is 2:1, and use a spray gun to evenly spray it on the lower polymer film. The spraying amount is (1-5)×10 -3 mL / cm 2 ; (3) Press the master mold with the channel structure vertically onto the surface of the lower polymer film after spraying, with a pressure range of 0.04-0.2N / cm 2 , and after continuously irradiating the master mold with ultraviolet light of 350nm wavelength for 60s, a film with a certain viscosity and a channel structure layer on the surface was obtained; (4) After cleaning the lower surface of the upper polymer film with clean nitrogen, the upper polymer film is treated with oxygen plasma. The upper polymer film is then passed through a single discharge electrode with a voltage of 7 kV at a speed of 100-200 m / min to make the dyne value of the film surface reach 40-60 dyn / cm. Within 2 minutes after the treatment is completed, the upper polymer film is covered on the channel structure layer obtained in step (3). The scraper is used to scrape from one side of the multilayer film to the other side to remove bubbles and fix the structure. (5) A color developer solution with a color development reaction is injected into the channel structure and dried to complete the processing of the multi-layer dynamic anti-counterfeiting film.

2. The multi-layer dynamic anti-counterfeiting film according to claim 1, characterized in that: The upper layer and the lower layer are made of one or more of polyethylene, polypropylene and polyethylene terephthalate.

3. The multi-layer dynamic anti-counterfeiting film according to claim 1, wherein: In step (3), the channel structure of the master mold is at least one of a simplified interconnected pattern of the product company trademark, a complex partially interconnected matrix, a barcode with digital information, a QR code pattern, and a Roman numeral pattern of the product production date.

4. The use of the multi-layer dynamic anti-counterfeiting film according to claim 1, characterized in that: include: (1) It is used as outer packaging to cover the outer surface of the product; (2) It can be made into an anti-counterfeiting patch or anti-counterfeiting label for separate use.

5. The method for verifying a multi-layer dynamic anti-counterfeiting film according to claim 1, wherein: include: A chemical solution capable of producing a color reaction is injected into the middle layer channel structure, and anti-counterfeiting verification is performed based on the occurrence of the color reaction in the channel.

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