Delayed fluorescent laser anti-counterfeiting hot stamping foil

Abstract

The utility model belongs to the field of packaging materials, and particularly relates to a delayed fluorescent laser anti-counterfeiting hot stamping foil, which is characterized in that a release layer, a first laser mould pressing coating, a delayed fluorescent pattern layer, a color printing pattern layer, a second laser holographic layer, a reflective layer and a back adhesive layer are sequentially arranged on the surface of a hot stamping foil base material, the number of the time-delay fluorescent pattern layers is multiple, the fluorescence disappearance time of each time-delay fluorescent pattern layer is different, and the time-delay fluorescent pattern layers are printed at the hollowed-out windows in an aligned or sleeved mode. The laser anti-counterfeiting technology and the delayed fluorescent anti-counterfeiting technology are applied to the hot stamping foil, so that the anti-counterfeiting performance of the hot stamping foil is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of packaging materials, more particularly to a kind of time-delay fluorescent laser anti-fake hot stamping foil. BACKGROUND

[0002] The electrochemical aluminum hot stamping foil is composed of a polyester film sheet base and a transfer layer. During the hot stamping process, the transfer layer is pressed onto the surface of the printing substrate by heat and pressure, forming a beautiful metal effect. This hot stamping foil is widely used in packaging, printing, decoration and other fields, adding unique visual effects and value to products. With the increasing demand for product security, electrochemical aluminum hot stamping foil has incorporated laser technology and fluorescent technology. For example, the utility model patent for a kind of laser hot stamping foil, granted by the China Patent Office on June 3, 2022, with publication number CN216659350U, has a laser holographic anti-fake effect. The utility model patent for electrochemical aluminum, granted by the China Patent Office on August 24, 2016, with publication number CN205498381U, has a fluorescent layer between the waterproof layer and the colored layer, allowing electrochemical aluminum to emit fluorescence at night.

[0003] The electrochemical aluminum hot stamping foil with single anti-fake technology has the defects of single effect and easy imitation. Combining laser holographic anti-fake technology with fluorescent anti-fake technology can greatly improve the anti-fake performance of electrochemical aluminum hot stamping foil. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a kind of time-delay fluorescent laser anti-fake hot stamping foil, which applies laser anti-fake technology and time-delay fluorescent technology to hot stamping foil, improving anti-fake performance.

[0005] The utility model is realized by the following technical solutions:

[0006] That is, a kind of time-delay fluorescent laser anti-fake hot stamping foil, characterized by a hot stamping foil substrate surface sequentially provided with a release layer, a first laser molding coating, a time-delay fluorescent pattern layer, a color printing pattern layer, a second laser holographic layer, a reflective layer and a back adhesive layer. The color printing pattern layer is provided with a plurality of hollow windows, and the number of time-delay fluorescent pattern layers is multiple. Each time-delay fluorescent pattern layer has different fluorescent disappearance time, and the time-delay fluorescent pattern layer is printed in the hollow window in alignment or nested position.

[0007] The time-delay fluorescent pattern layer of the utility model is flexographically printed by nitrogen-doped, fluorine-copolymerized fluorescent carbon quantum dots. The nitrogen-doped, fluorine-copolymerized fluorescent carbon quantum dot material is a mature existing fluorescent material.

[0008] The hot stamping foil substrate of the utility model is a BOPET film.

[0009] The multiple fluorescent pattern layers are designed according to different fluorescent disappearance times, pattern encryption is designed, combination and arrangement of different fluorescent disappearance inks are controlled, pattern information with specific fluorescent effects is designed, the fluorescent pattern can be characters, digits, scenes, figures, enterprise logos and the like, and can also be superimposed application of multiple information patterns.

[0010] The delay fluorescent pattern layer can continuously emit light for a period of time after the excitation source stops, and complexity and non-reproducibility of the pattern are increased.

[0011] The principle of the utility model is as follows:

[0012] The delay fluorescent pattern on the stamping foil cannot be observed under natural light, the pattern appears under ultraviolet excitation, each delay fluorescent pattern slowly disappears after the ultraviolet light is turned off, different parts disappear at different times, thereby forming a delay fluorescent disappearance code, and the difficulty of imitation is increased due to the time-related physical properties.

[0013] The multiple delay fluorescent pattern layers can be simultaneously arranged in the same hollow window, or can be arranged in different hollow windows, and each delay fluorescent pattern layer can also occupy multiple hollow windows.

[0014] Further, the two units of the same pattern on the stamping foil are spaced apart, the number and position of the delay fluorescent pattern layer of the first unit correspond to the number and position of the delay fluorescent pattern layer of the second unit, and the order of fluorescent disappearance time of the delay fluorescent pattern layers of the two units is different.

[0015] The delay fluorescent pattern layers of the two adjacent units have the same position, but the order of fluorescent disappearance time is different, and the difficulty of imitation is increased.

[0016] Further, the reflective layer is any one of a metal aluminum layer, a metal copper layer, a zinc sulfide layer and an aluminum oxide layer.

[0017] The reflective layer is mainly used for protecting the laser holographic pattern, and the high-brightness feature of the reflective layer can contrast the color printing pattern and the laser pattern, and the brightness and the color effect of the pattern are improved.

[0018] Further, the color printing pattern layer comprises a two-dimensional code or an anti-fake telephone number.

[0019] The displayed page comprises characters or animations introducing the fluorescent delay through scanning the two-dimensional code, and the authenticity is verified by verifying whether the introduction in the two-dimensional code is consistent with the actual situation.

[0020] By dialing the anti-fake telephone number, the voice contains the introduction of the fluorescent delay, and the authenticity is verified by verifying whether the introduction in the voice is consistent with the actual one.

[0021] The utility model discloses a reasonable structure and good anti-fake performance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model embodiment 1.

[0023] Figure 2 It is a layer structure schematic diagram of one unit of the utility model.

[0024] As shown in the figure: 1. Foil base material; 2. Release layer; 3. First laser die coating; 4. Delayed fluorescence pattern layer; 5. Color printing pattern layer; 6. Second laser holographic layer; 7. Reflective layer; 8. Back adhesive layer; 9. Two-dimensional code. DETAILED DESCRIPTION

[0025] The embodiments of the utility model technical scheme will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, therefore only as an example, and cannot limit the protection scope of the utility model. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meaning understood by the technical personnel in the field of the utility model. Embodiment 1

[0026] As Figure 1 shown: the foil is provided with a plurality of repeating pattern units, each unit contains 3 delayed fluorescence pattern layers 4 and a two-dimensional code 9, and the order of the fluorescence disappearance time of the 3 delayed fluorescence pattern layers 4 in each unit is the same.

[0027] As Figure 2 shown is the layer structure of the foil, the front of the foil base material 1 is provided with a release layer 2, a first laser die coating 3, a delayed fluorescence pattern layer 4, a color printing pattern layer 5, a second laser holographic layer 6, a reflective layer 7 and a back adhesive layer 8 from bottom to top in sequence, the color printing pattern layer 5 is provided with a plurality of hollow windows, the fluorescence disappearance time of the 3 delayed fluorescence pattern layers 4 is different, the delayed fluorescence pattern layer 7 is printed in the hollow window in position or in a nested position, and the two-dimensional code 9 is part of the color printing pattern layer 5.

[0028] The foil manufacturing process of the embodiment is as follows:

[0029] 1) Fluorescent pattern design, according to different fluorescent disappearance time, pattern encryption design, through the control of different fluorescent disappearance ink combination and arrangement, design the pattern information with specific fluorescent effect, fluorescent pattern can be text, digital, scenery, characters, enterprise logo, etc., but also can be a variety of information pattern superimposed application;

[0030] 2) Foil substrate 1 is BOPET film, the film thickness requirement is 12-20um;

[0031] 3) Coating release layer 2, release layer uses one of 5017 water wax, OP wax, resin release layer,

[0032] 4) Coating the first laser die coating layer 3 on the release layer, the coating layer does not carry out the stamping processing, just as the bearing layer of the later time delay fluorescent pattern layer 4 and the color printing pattern layer 5, the coating dry weight is 0.5-0.8g / m 2 , the drying time is 5-10s, the drying temperature is 90-130℃;

[0033] 5) Printing different time delay fluorescent pattern layer 4 on the first laser die coating layer 3, printing adopts the flexographic printing method, through the fluorescent ink with different fluorescent disappearance time, the organic invisible fluorescent code pattern is formed by the printing of the same position or the printing of the same position. The fluorescent ink is selected from the flexographic ink doped with nitrogen, fluorine and copolymer fluorescent carbon quantum dot material;

[0034] 6) Color printing pattern on the time delay fluorescent pattern layer 4 to form color printing pattern layer 5, the pattern can be enterprise logo, digital information, product picture and other information, the color printing pattern layer 5 is provided with a plurality of hollow windows, and the three time delay fluorescent pattern layers 4 are located at the three hollow windows;

[0035] 7) Coating the second laser die coating layer on the color printing pattern layer, the coating dry weight is 0.8-1.2g / m 2 , the drying time is 5-10s, the drying temperature is 90-130℃;

[0036] 8) Stamping holographic information layer, stamping laser holographic pattern on the surface of the second laser die coating layer to form the second laser holographic layer 6, the stamping temperature is 170-200℃, and the vehicle speed is 40-60m / min;

[0037] 9) Vacuum evaporation of reflective layer, the reflective layer is one of metal aluminum, metal copper, zinc sulfide and aluminum oxide. The reflective layer is mainly used for protecting the laser holographic pattern, and the high brightness characteristics of the reflective layer can contrast the color printing pattern and the laser pattern, and improve the brightness and the fantasy effect of the pattern;

[0038] 10) On the reflective layer, coat the adhesive layer and dry. Form a time-delay fluorescent laser anti-counterfeiting stamping foil, oven drying temperature 85-135℃; drying time 5-10s; coating dryness: 1.2-1.5 g / m2.

[0039] In use, the code scanning two-dimensional code 9, according to the introduction of the page, using ultraviolet light equipment irradiation stamping foil on one of the units, under the excitation of ultraviolet light, the pattern of time-delay fluorescent pattern layer 3 appears, when the ultraviolet light is off, each time-delay fluorescent pattern layer 3 pattern slowly disappears, different parts disappear at different times, through the introduction of the verification of the two-dimensional code is consistent with the actual to verify the authenticity. Embodiment 2

[0040] As Figure 1 described: in adjacent units, the order of the fluorescent disappearance time of the three time-delay fluorescent pattern layers is different. The others are the same as embodiment 1.

[0041] In this embodiment, the time-delay fluorescent pattern layers 3 of two adjacent units, although the position and quantity are the same, the order of the fluorescent disappearance time is different, which increases the difficulty of imitation.

[0042] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A time delay fluorescent laser security stamping foil, characterized in that The surface of the hot stamping foil substrate is sequentially provided with a release layer, a first laser die coating layer, a delay fluorescent pattern layer, a color printing pattern layer, a second laser holographic layer, a reflective layer and a back adhesive layer, the color printing pattern layer is provided with a plurality of hollow windows, the number of the delay fluorescent pattern layers is multiple, the fluorescent disappearance time of each delay fluorescent pattern layer is different, and the delay fluorescent pattern layers are printed in alignment or in nesting at the hollow windows.

2. The time delay fluorescent laser anti-counterfeit stamping foil according to claim 1, characterized in that The two same pattern units are distributed at intervals on the hot stamping foil, the number and position of the delay fluorescent pattern layer of the first unit correspond to the number and position of the delay fluorescent pattern layer of the second unit, and the order of the fluorescent disappearance time of the delay fluorescent pattern layers of the two units is different.

3. The time delay fluorescent laser anti-counterfeit stamping foil according to claim 1, characterized in that The reflective layer is any one of a metal aluminum layer, a metal copper layer, a zinc sulfide layer and an aluminum oxide layer.

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