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Transparent nano florescent material composition and application thereof in invisible anti-counterfeiting products

A material composition and nano-fluorescence technology, which is applied in the direction of luminescent materials, applications, luminescent coatings, etc., can solve the problems of visible anti-counterfeiting signs that are easy to be counterfeited, luminescent substances that cannot produce transition colors, and inorganic nano-luminescent materials that are difficult

Active Publication Date: 2011-04-06
NANJING XIGUANG OPTO ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the multi-color and changeable brand patterns, in order to maintain the visual aesthetics of the brand or logo, traditional phosphors cannot be accepted by brand owners in most cases
In addition, visible anti-counterfeiting signs with background colors are also easy to be counterfeited
[0004] Moreover, the existing fluorescent materials also have the following technical problems in the preparation: (1) organic light-emitting materials are easy to age, have low luminous efficiency, and their lifespan is reduced under sunlight exposure; (2) inorganic nano-luminescent materials are difficult to prepare, and it is difficult The diameter is controlled at the nanometer level, which leads to Rayleigh scattering of the material and cannot guarantee complete transparency, or even if the material is prepared to the nanometer level, it also brings problems such as high synthesis cost, low brightness, and too short excitation wavelength. narrow; and (3) the luminescent substances interfere with each other and cannot produce transition colors

Method used

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  • Transparent nano florescent material composition and application thereof in invisible anti-counterfeiting products
  • Transparent nano florescent material composition and application thereof in invisible anti-counterfeiting products
  • Transparent nano florescent material composition and application thereof in invisible anti-counterfeiting products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: Preparation of transparent nano-fluorescent material

[0055] Embodiment 1 (a): Preparation of Transparent Inorganic Nano-oxide Phosphor Powder

[0056] Synthesis of YVO by solvothermal method 4 :Eu 3+ , Bi 3 and LaPO 4 : Ce 3+ , Tb 3+ nanocrystals. Synthesis of Y by high temperature solvent method 2 o 3 :Eu 3+ nanocrystals. Transmission electron microscopy shows that the average crystallite size of these nanocrystallites is about 15-100 nanometers. Dissolving such fine particles into a solvent forms a completely colorless and invisible functional luminescent liquid, which emits striking characteristic light under the excitation of a purple light.

[0057] The obtained nano-luminescent material can be applied to the field of anti-counterfeiting. It can not only make colorful patterns on the colorless and transparent medium, but also emit different lights from the same material under the excitation of different ultraviolet wavelengths, thus g...

Embodiment 2

[0064] Example 2: Application of transparent nano-fluorescent materials in transparent film anti-counterfeiting products

[0065] The transparent nano-fluorescent material prepared in Example 1 is made into a transparent fluorescent film by flexo printing, which is used as a special "light-emitting" package to cover the cigarette case. The film is colorless and transparent under natural light, so it will not affect the appearance of the product, and will emit light under excitation, so as to achieve the purpose of improving brand image and anti-counterfeiting. Because nano fluorescent materials are transparent, multi-level or mixed nano fluorescent materials can be used on one product at the same time. Such as figure 2 As shown, the multi-layered nano-fluorescent material can exhibit a variety of unique luminescent colors due to excitation of different wavelengths.

Embodiment 3

[0066] Embodiment 3: Application of transparent nano fluorescent material in transparent ink anti-counterfeiting products

[0067] Dissolve the transparent nano-fluorescent material prepared in Example 1 into a commercially available transparent ink at a concentration of about 5 / 1000 to make a transparent ink, and print it on a cigarette case and an instrument panel by a digital inkjet printer to make a Various colored invisible anti-counterfeiting patterns (such as image 3 shown), thereby improving the level of anti-counterfeiting.

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Abstract

The invention relates to a transparent nano florescent material composition and application thereof in invisible anti-counterfeiting products. The invention provides the transparent nano florescent material composition of which the transparency to wavelengths between 390 and 650 nanometers is over 50 percent. The transparent nano florescent material composition comprises the following nano florescent materials: inorganic nano oxide fluorescent powder which contains rare earth elements, an organic dye which contains unsaturated bonds, organic light-emitting small molecules, semiconductor fluorescence quantum dots, and organic metal complex molecules which contain the rare earth elements, wherein the average particle diameter of the nano fluorescent materials is not more than 400 nanometers.

Description

technical field [0001] The invention relates to various applications of novel fluorescent materials in product anti-counterfeiting. Specifically, it relates to a novel transparent nano-fluorescent material composition and its application in invisible anti-counterfeiting products. The transparent nano fluorescent material composition can be transparently covered on the surface of commodities for anti-counterfeiting or beautifying purposes. Background technique [0002] Brand counterfeiting is a major problem today, costing billions of dollars in lost sales each year. Brand names and logos are often printed on product surfaces and packaging materials, such as Coca-Cola, Nike, Apple, etc., showing a specific shape or color under certain ambient light. The traditional inks used are commercially available, so brand names and logos can be easily counterfeited. [0003] One means of deterring such counterfeiting is the introduction of functional materials into existing printing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/06C08K13/02C09D11/02C09D11/16C09D7/12C09D5/22G09F3/02C09D11/50
Inventor 孙晓东牟林
Owner NANJING XIGUANG OPTO ELECTRIC TECH CO LTD
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