CN209168161U - Multiple anti-fake fluorescent two-dimensional code device - Google Patents

Abstract

The multiple anti-counterfeiting fluorescent two-dimensional code device, from outside to inside, includes a first layer of transparent PVC protective film layer, a second layer of ordinary two-dimensional code layer, a third layer of terbium oxalate doped PMMA film layer, and a fourth layer of europium oxalate doped The PMMA film layer and the fifth white base layer. The utility model displays different two-dimensional codes under different lights, is convenient to use, and can protect privacy and property safety in many aspects.

Description

Multiple anti-counterfeiting fluorescent two-dimensional code device

technical field

The utility model relates to a multiple anti-counterfeiting fluorescent two-dimensional code device.

Background technique

The two-dimensional code records the data symbol information with a black and white pattern distributed on a plane (two-dimensional direction) according to a certain specific geometric figure according to a certain rule; in the code compilation, the "0" that constitutes the internal logic foundation of the computer is cleverly used. , the concept of "1" bit stream. This shows that the two-dimensional code is just a digital matrix composed of many 0s and 1s. This feature also makes the two-dimensional code can be imitated by copying, photographing, photocopying, etc. However, in today's society, information leakage involves major issues such as property, privacy, and identity. This hidden loss and potential threat are often unacceptable.

SUMMARY OF THE INVENTION

The utility model aims to overcome the above shortcomings of the prior art, and provides a multiple anti-counterfeiting fluorescent two-dimensional code device.

The multiple anti-counterfeiting fluorescent two-dimensional code device is characterized in that: from the outside to the inside, it includes a first transparent protective film layer 1, a second ordinary two-dimensional code layer 2, a third terbium oxalate doped PMMA film layer 3, a third layer Four layers of europium oxalate doped PMMA thin film layer 4 and a fifth layer of white base layer 5 .

The thin paper containing the ordinary two-dimensional code is the thin paper printed with the required two-dimensional code and the surface pattern of which is designed according to the needs. The two-dimensional code can be generated as required and printed with ink, and the hollow is to remove the paper part of the specified shape from the white area on the two-dimensional code. The white bottom plate can be made of ordinary white paper. The europium oxalate doped PMMA film is a transparent film obtained by dissolving europium oxalate in a polymethyl methacrylate swelling solution and drying. Europium oxalate emits red light under ultraviolet light at a wavelength of 365 nm and makes the film opaque. The terbium oxalate doped PMMA film is a transparent film formed by dissolving terbium oxalate into a polymethyl methacrylate swelling solution and drying. Terbium oxalate emits green light under UV light at a wavelength of 400 nm and makes the film opaque. The protective film is made of PVC film.

Terbium oxalate and europium oxalate are common rare earth compounds, their CAS numbers are: terbium oxalate (decahydrate), CAS number 58176-68-4, europium oxalate (hexahydrate), CAS number 3269-12-3. For the preparation methods of the terbium oxalate doped PMMA thin film layer and the europium oxalate doped PMMA thin film layer, refer to the previously published literature "Novel Eu-containing titania composites derived from a new Eu(III)-doped polyoxotitanate cage, RSC Adv., 2016, 6,57 "The method for preparing [Ti ₂ O(OEt) ₈ (EtOH)EuCl] ₂ doped PMMA thin film layer prepared by terbium oxalate doped PMMA thin film layer and europium oxalate doped PMMA thin film layer (that is, with oxalic acid) Terbium or europium oxalate instead of [Ti ₂ O(OEt) ₈ (EtOH)EuCl] ₂ doping the PMMA film layer in the same way).

The multiple anti-counterfeiting fluorescent two-dimensional code is characterized in that: the multiple anti-counterfeiting fluorescent two-dimensional code is assembled from multiple layers of materials, the first layer is a PVC protective film, and the second layer is a hollow ordinary two-dimensional code , the third layer is a PMMA film doped with terbium oxalate, and then selectively hollow out part of the area where the second layer is hollowed out, the fourth layer is a PMMA film doped with europium oxalate, and the fifth layer is a white substrate. Multiple anti-counterfeiting fluorescent QR codes are compressed and protected with protective film.

The product of the utility model can show some different patterns under the irradiation of 450-700nm natural light, 365-400nm wavelength ultraviolet light and less than 360nm wavelength ultraviolet light respectively.

Under the illumination of 450-700nm natural light, ordinary QR codes appear.

Under the irradiation of 365-400nm wavelength ultraviolet light, on the basis of the original black two-dimensional code, there are more opaque green symbol points to form a new two-dimensional code.

Under the light of ultraviolet wavelength less than 365nm, in addition to the green symbol dots, opaque red symbol dots appear in other blank parts on the two-dimensional code, and the two-dimensional code under the wavelength of 400nm constitutes a new two-dimensional code.

The utility model has the advantages that it is convenient to use, can protect privacy and property safety in many aspects, and is suitable for people's needs.

Description of drawings

Fig. 1 is the schematic diagram that the utility model displays two-dimensional code content under the visible light that wavelength is 450nm-700nm;

Fig. 2 is the schematic diagram that the utility model displays two-dimensional code content under the ultraviolet light that the wavelength is 365-400nm;

3 is a schematic diagram of the utility model displaying two-dimensional code content under ultraviolet light with a wavelength less than 360 nm;

FIG. 4 is a schematic diagram of the layered structure of the main body of the present invention.

Detailed ways

1 and 2, a multiple anti-counterfeiting fluorescent two-dimensional code is implemented as follows:

The multiple anti-counterfeiting fluorescent two-dimensional code device described in the utility model patent sequentially includes a first transparent protective film layer 1 , a second ordinary two-dimensional code layer 2 , and a third terbium oxalate-doped PMMA film layer 3 from the outside to the inside. , the fourth layer 4 of europium oxalate doped PMMA thin film, the fifth layer of white base layer 5 .

The transparent protective film is a PVC film.

The common two-dimensional code is a two-dimensional code that is generated independently and hollowed out as required.

The terbium oxalate doped PMMA film is a transparent film formed by dissolving terbium oxalate in a polymethyl methacrylate swelling solution and drying and selectively hollowing out the part of the second layer of ordinary two-dimensional code. And 400nm UV light becomes green opaque film.

The PMMA film doped with europium oxalate is a transparent film produced by dissolving europium oxalate in a polymethyl methacrylate swelling solution and drying. Color changes.

The white substrate can be one of ordinary cardboard, plastic plate, glass plate and the like.

The content described in the embodiments of the present specification is only an enumeration of the realization forms of the inventive concept, and the protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments, and the protection scope of the present invention also includes this field Equivalent technical means that can be conceived by a skilled person according to the concept of the present invention.

Claims (1)

1. The multiple anti-counterfeiting fluorescent two-dimensional code device is characterized in that: from the outside to the inside, it comprises a first layer of PVC transparent protective film layer (1), a second layer of ordinary two-dimensional code layer (2), and a third layer of terbium oxalate doped The PMMA thin film layer (3), the fourth layer of the PMMA thin film layer (4) doped with europium oxalate, and the fifth layer of the white base layer (5).