CN111391539A - A kind of card containing multi-color fluorescent pattern and its making method - Google Patents

Abstract

The invention discloses a certificate card containing multicolor fluorescent patterns and a manufacturing method thereof, wherein the stability and the durability of a fluorescent material are improved by microencapsulating a cellulose-based solid fluorescent material; the three-primary-color fluorescent ink with the dynamic adjustable fluorescence resonance energy transfer and the long-afterglow fluorescent ink are cooperatively applied to generate a multicolor composite fluorescent mark, so that the dynamic and static combination and rich fluorescent color change characteristics of the fluorescent mark under the excitation of ultraviolet light are realized. Under the excitation of ultraviolet light, the dynamic fluorescent color-changing effect can be identified by human eyes; the long afterglow fluorescent material can measure the fluorescent life with special equipment to obtain characteristic value and is not affected by the exciting light strength, the fluorescent strength change of the material and other factors. The composite fluorescent mark can also be combined with anti-counterfeiting characteristics such as laser etching and the like for application, so that the anti-counterfeiting performance is further improved, and the protection of personal information is promoted.

Description

A kind of card containing multi-color fluorescent pattern and its making method

technical field

The invention relates to the technical field of card manufacturing, in particular to a card containing a multicolor fluorescent pattern and a manufacturing method thereof.

Background technique

Fluorescent anti-counterfeiting technology has the characteristics of good concealment and simple identification, and is one of the most commonly used anti-counterfeiting technologies for card tickets. Usually, rare earth-doped fluorescent materials are mixed with polymer resin binders, solvents, additives, etc. to prepare colored or colorless fluorescent printing inks, which are printed on paper or plastic films by combining single-color or multi-color fluorescent inks. It can be printed on the surface of the object, and the final product can produce bright static fluorescent patterns under the irradiation of ultraviolet light.

However, with the wide application of fluorescent anti-counterfeiting technology and the reduction of the technical threshold of fluorescent material manufacturing, counterfeiters can easily obtain fluorescent materials and fluorescent printing inks of various colors in the market. In recent years, many other different kinds of functional luminescent materials have been developed, such as quantum dots, carbon dots, polymer dots, perovskite dots, organic molecular fluorescent nanoparticles, organic fluorescent dyes, etc. It is impossible to accurately and effectively identify the authenticity of fluorescent features simply by relying on the luminous color. The effectiveness and safety of traditional fluorescent anti-counterfeiting are facing challenges. It is imperative to develop new fluorescent anti-counterfeiting technologies and innovative inspection methods.

Adv.Funct.Mater.2017, 1703548 reported a dynamic full-color fluorescence technology based on cellulose. This technology makes full use of the structural characteristics of cellulose to modify three fluorophores with different structures, such as spiropyran, fluorescein and pyrene. On the skeleton of cellulose derivatives, three primary color materials were obtained, among which the cellulose-spiropyran material had fluorescent photochromic properties in addition to the common photochromic properties. The above-mentioned three primary color materials can be conveniently prepared into fluorescent printing inks. The dynamic full-color fluorescence effect is achieved through the fluorescence resonance energy transfer between the three primary color materials. The printed fluorescent pattern undergoes a dynamic color change under continuous exposure to ultraviolet light, which can last for several to tens of seconds. However, cellulose-based three-primary fluorescent materials are still organic materials. Compared with inorganic rare-earth-doped fluorescent materials, the fluorescence intensity will decrease with time to a certain extent. long-term use requirements. In addition, the dynamic fluorescent discoloration effect relies more on human eye recognition, the real-time comparison process is difficult to control, and there is a lack of stable and reliable quantitative identification methods.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention aims to provide a card containing a multi-color fluorescent pattern and a manufacturing method thereof, so as to improve the durability of the cellulose-based three-color fluorescent material in the card and increase the characteristics of the fluorescent pattern. The quantitative identification method of the card further improves the overall security and anti-counterfeiting performance of the card.

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

A manufacturing method of a card containing a multi-color fluorescent pattern, comprising the following steps:

S1. Microencapsulate the cellulose-based solid fluorescent materials of the three primary colors respectively;

S2. The microencapsulated cellulose-based solid fluorescent materials of the three primary colors are respectively prepared into fluorescent inks of three primary colors, wherein at least one of the primary colors of the cellulose-based solid fluorescent materials has the property of photofluorescence color change, and Effective fluorescence resonance energy transfer process can occur between cellulose-based solid fluorescent materials with other two primary colors;

S3. Use fluorescent inks of three primary colors to print fluorescent logo pattern 1 on the transparent printing layer material, so that it has a dynamic fluorescent color changing effect;

S4, using long afterglow fluorescent ink to print the second fluorescent identification pattern on the transparent printing layer material, wherein the second fluorescent identification pattern and the partial area of the first fluorescent identification pattern are overlapped to form a composite fluorescent identification pattern;

S5. With the core layer material as the center, assemble the etching layer material, the transparent printing layer material and the surface protective layer material on the top and bottom surfaces of the top and bottom respectively, and then make a single card by heat lamination and punching ; The transparent printing layer material printed with the fluorescent logo pattern one and the fluorescent logo pattern two is located above the core layer material;

S6. Use laser etching personalized equipment to print the personal information of the holder on a single card, and the personal information of the holder is partially overlapped with the composite fluorescent logo pattern.

Further, in the above method, the fluorescent marking pattern 1 and the fluorescent marking pattern 2 are printed on the same transparent printing layer material, or are respectively printed on different transparent printing layer materials.

Further, in the above method, an anti-UV aging agent component is added to the surface protective layer material.

The present invention also provides a card containing a multi-color fluorescent pattern produced by the above-mentioned production method.

The beneficial effects of the present invention are:

1. The present invention improves the stability and durability of the fluorescent material by microencapsulating the cellulose-based solid fluorescent material;

2. The present invention generates multi-color composite fluorescent markings through the synergistic application of three-primary fluorescent inks with dynamic tunable fluorescence resonance energy transfer and long afterglow fluorescent inks, and realizes the dynamic and static combination of fluorescent markings under the excitation of ultraviolet light and rich fluorescent color changes feature. Under the excitation of ultraviolet light, the dynamic fluorescence discoloration effect can be recognized by the human eye; the long afterglow fluorescent material can be measured by special equipment to give the characteristic value of the fluorescence lifetime, which is not affected by factors such as excitation light intensity and material fluorescence intensity change. The above-mentioned composite fluorescent labels can also be combined with anti-counterfeiting features such as laser etching to further increase the anti-counterfeiting performance and improve the protection of personal information.

3. By adding an anti-UV aging agent to the protective layer, the effect of ultraviolet rays on the aging of fluorescent labels can be slowed down.

Description of drawings

Fig. 1 is the exploded structure schematic diagram of the product in the embodiment 2 of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of the product in Example 3 of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the present embodiment takes the technical solution as the premise, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

Example 1

This embodiment provides a method for manufacturing a card containing a multi-color fluorescent pattern, including the following steps:

S1. Microencapsulate the cellulose-based solid fluorescent materials of the three primary colors respectively, which can effectively overcome the aggregation-induced quenching problem of traditional fluorescent molecules, increase the number of fluorescent molecules per unit volume, and avoid the interaction between fluorescent molecules and the external environment. Direct contact can effectively improve the weather resistance and stability of organic fluorescent materials.

S2. The microencapsulated cellulose-based solid fluorescent materials of the three primary colors are respectively prepared into fluorescent inks of three primary colors, wherein at least one of the primary colors of the cellulose-based solid fluorescent materials has the property of photofluorescence color change, and Effective fluorescence resonance energy transfer process can occur between cellulose-based solid fluorescent materials with other two primary colors;

It should be noted that fluorescence resonance energy transfer refers to a phenomenon of energy transfer between two fluorescent molecules that are very close to each other. When the emission spectrum of the donor fluorescent molecule overlaps the absorption spectrum of the acceptor fluorescent molecule, and the distance between the two molecules is within 10 nm, a non-radioactive energy transfer is emitted, making the fluorescence intensity of the donor stronger than that of it alone is much lower in the presence, while the fluorescence emitted by the receptor is greatly enhanced.

S3. Use fluorescent inks of three primary colors to print fluorescent logo pattern 1 on the transparent printing layer material, so that it has a dynamic fluorescent color changing effect;

It should be noted that the fluorescent inks of the three primary colors are sequentially printed on the transparent printing layer material in a certain order (eg, red, green, and blue) to obtain a fluorescent identification pattern 1. Using the fluorescence resonance energy transfer between the different primary color fluorescent materials in the overlapping parts of the printing, the dynamic fluorescent effect can be realized under the ultraviolet irradiation.

S4, using long afterglow fluorescent ink to print the second fluorescent identification pattern on the transparent printing layer material, wherein the second fluorescent identification pattern and the partial area of the first fluorescent identification pattern are superimposed to form a composite fluorescent identification pattern.

It should be noted that the fluorescent marking pattern 1 and the fluorescent marking pattern 2 may be printed on the same transparent printing layer material, or may be printed on different transparent printing layer materials respectively.

S5. With the core layer material as the center, assemble the etching layer material, the transparent printing layer material and the surface protective layer material on the top and bottom surfaces of the top and bottom respectively, and then make a single card by heat lamination and punching ; The transparent printing layer material printed with the fluorescent logo pattern one and the fluorescent logo pattern two is located above the core layer material;

It should be noted that adding an anti-UV aging agent component to the surface protective layer material can slow down the influence of ultraviolet rays on the fluorescent label.

S6. Use laser etching personalized equipment to print the personal information of the holder on a single card, and the personal information of the holder is partially overlapped with the composite fluorescent logo pattern.

Under the irradiation of ultraviolet light, the card produced by the method of this embodiment can produce rich color change characteristics, including not only the fluorescent energy transfer process between the three primary color fluorescent inks within a certain period of time, but also the bright color and long afterglow fluorescent materials. Synergistic optical effects of dynamic fluorescent colors. In addition, the marking part in the non-overlapping area of the long-persistence fluorescent marking and the dynamic fluorescent marking can also be measured by a special fluorescence lifetime instrument, and its lifetime characteristic value is stable and reliable. In this way, the composite fluorescent marking realizes the naked eye qualitative identification and instrumentation of fluorescence characteristics. Quantitative identification, the anti-counterfeiting performance is greatly improved. In addition, using a special card layer structure design and laser etching process, the focused laser penetrates through the transparent printing layer material containing fluorescent logos, imaging the etching layer material, and the ingenious application of multi-level comprehensive anti-counterfeiting technology further enhances the The protection and anti-counterfeiting performance of personal information of documents.

Example 2

This embodiment provides an application example of the method described in Embodiment 1 in making a PET card. As shown in Figure 1.

The first step: microencapsulate the cellulose-based solid fluorescent materials of the three primary colors to coat the surface with transparent polystyrene; among them, the red cellulose-based solid fluorescent materials have photofluorescence color-changing properties, which can be combined with green An efficient fluorescence resonance energy transfer process occurs between the cellulose-based solid fluorescent material and the blue cellulose-based solid fluorescent material;

The second step: using the microencapsulated cellulose-based solid fluorescent materials of three primary colors to prepare fluorescent inks, respectively, to obtain fluorescent inks of three primary colors.

The third step: using fluorescent inks of three primary colors to print the fluorescent logo pattern 105 on the PETG transparent printing layer material 103, so that it has a dynamic fluorescent color changing effect;

The fourth step: using long afterglow fluorescent ink to print the second fluorescent logo pattern 106 on the same PETG transparent printing layer material 103, wherein the fluorescent logo pattern two 106 and the part of the fluorescent logo pattern one 105 overlap to form a composite fluorescent logo pattern .

Step 5: With the PETG core layer material 101 as the center, assemble the PETG etching layer material 102, the PETG transparent printing layer material 103 and the PET surface protective layer material 104 on the top surface upward and the bottom surface downward respectively, and then heat-sealing Lamination and punching to make a single card; the PETG transparent printing layer material printed with the fluorescent logo pattern 2 and the fluorescent logo pattern 1 is located above the PETG core layer material;

In this embodiment, an anti-UV aging agent is added to the PET surface protective layer material 104, which can slow down the influence of ultraviolet rays on the fluorescent marking.

Step 6: Use laser etching personalization equipment to print the cardholder's personal information, such as photos, on the single card made. The personal information of the holder is partially overlapped with the composite fluorescent logo pattern.

Example 3

This embodiment provides an example of the method described in Embodiment 1 in making a PC card. as shown in picture 2.

The first step: microencapsulate the cellulose-based solid fluorescent materials of the three primary colors to coat the surface with transparent polystyrene; among them, the red cellulose-based solid fluorescent materials have photofluorescence color-changing properties, which can be combined with green An efficient fluorescence resonance energy transfer process occurs between the cellulose-based solid fluorescent material and the blue cellulose-based solid fluorescent material;

The second step: using the microencapsulated cellulose-based solid fluorescent materials of three primary colors to prepare fluorescent inks, respectively, to obtain fluorescent inks of three primary colors.

The third step: using fluorescent inks of three primary colors to print a fluorescent logo pattern 1 205 on a layer of PC transparent printing layer material 203, so that it has a dynamic fluorescent color changing effect;

The fourth step: using long afterglow fluorescent ink to print fluorescent logo pattern 2 206 on another PC transparent printing layer material 203; two layers of PC transparent printing layer material 203 are superimposed adjacently, fluorescent logo pattern two 206 and fluorescent logo pattern one 205 Part of the area is superimposed to form a composite fluorescent logo pattern.

Step 5: With the PC core layer material 201 as the center, assemble the PC etching layer material 202, the PC transparent printing layer material 203 and the PC surface protective layer material 204 on the top surface upward and the bottom surface downward respectively, and then heat-sealing Lamination and punching to make a single card; the PC transparent printing layer material printed with the fluorescent logo pattern 2 and the fluorescent logo pattern 1 is located above the PC core layer material;

In this embodiment, an anti-UV aging agent is added to the PET surface protective layer material, which can slow down the influence of ultraviolet rays on the fluorescent marking.

Step 6: Use laser etching personalization equipment to print the cardholder's personal information, such as photos, on the single card made. The personal information of the holder is partially overlapped with the composite fluorescent logo pattern.

For those skilled in the art, various corresponding changes and deformations can be given according to the above technical solutions and concepts, and all these changes and deformations should be included within the protection scope of the claims of the present invention.

Claims (4)

1. a preparation method of the card containing a multicolor fluorescent pattern, is characterized in that, comprises the steps: S1. Microencapsulate the cellulose-based solid fluorescent materials of the three primary colors respectively; S2. The microencapsulated cellulose-based solid fluorescent materials of the three primary colors are respectively prepared into fluorescent inks of three primary colors, wherein at least one of the primary colors of the cellulose-based solid fluorescent materials has the property of photofluorescence color change, and Effective fluorescence resonance energy transfer process can occur between cellulose-based solid fluorescent materials with other two primary colors; S3. Use fluorescent inks of three primary colors to print fluorescent logo pattern 1 on the transparent printing layer material, so that it has a dynamic fluorescent color changing effect; S4, using long afterglow fluorescent ink to print the second fluorescent identification pattern on the transparent printing layer material, wherein the second fluorescent identification pattern and the partial area of the first fluorescent identification pattern are overlapped to form a composite fluorescent identification pattern; S5. With the core layer material as the center, assemble the etching layer material, the transparent printing layer material and the surface protective layer material on the top and bottom surfaces of the top and bottom respectively, and then make a single card by heat lamination and punching ; The transparent printing layer material printed with the fluorescent logo pattern one and the fluorescent logo pattern two is located above the core layer material; S6. Use laser etching personalized equipment to print the personal information of the holder on a single card, and the personal information of the holder is partially overlapped with the composite fluorescent logo pattern. 2 . The manufacturing method according to claim 1 , wherein the first fluorescent identification pattern and the second fluorescent identification pattern are printed on the same transparent printing layer material, or respectively printed on different transparent printing layer materials. 3 . 3 . The method according to claim 1 , wherein an anti-UV aging agent is added to the surface protective layer material. 4 . 4. A card containing a multi-color fluorescent pattern produced by the production method according to any one of claims 1-3.

Images