Anti-counterfeiting carbon powder for printer and preparation method of anti-counterfeiting carbon powder

Abstract

The invention belongs to the technical field of novel functional materials, and relates to anti-counterfeiting carbon powder for a printer and a preparation method thereof.The anti-counterfeiting carbon powder for the printer is prepared by adopting an ultraviolet fluorescent compound, resin, a release agent, a charge control agent and a treating agent as raw materials and conducting proper proportioning; the preparation method comprises the following steps: uniformly mixing the ultraviolet fluorescent compound, the resin and the charge control agent to obtain a mixed material, mixing the mixed material, adding the release agent and the treating agent in sequence in the mixing process to obtain a mixed product, and pressing the mixed product to obtain a ribbon, the anti-counterfeiting carbon powder for the printer is obtained by sequentially carrying out coarse crushing treatment and fine crushing treatment on the strip-shaped object, and the anti-counterfeiting carbon powder emits fluorescence under ultraviolet light, is stable in property and has good anti-counterfeiting performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of functional new materials, and particularly relates to a printer anti-counterfeiting carbon powder and a preparation method thereof. BACKGROUND

[0002] The printer anti-counterfeiting pigment includes ultraviolet fluorescent color change, sunlight excitation color change, infrared anti-counterfeiting, photochromic, heat-sensitive anti-counterfeiting, pressure-sensitive anti-counterfeiting carbon powder, etc. Among them, the text printed by using the ultraviolet excitation anti-counterfeiting carbon powder is bright fluorescent under ultraviolet irradiation, which is a pigment for inkjet printing of invisible anti-counterfeiting marks, text, images, etc. The anti-counterfeiting content printed by the invisible anti-counterfeiting ink cartridge is invisible under ordinary light; only under a specific ultraviolet light environment, the printed anti-counterfeiting content is clearly visible.

[0003] The printer anti-counterfeiting carbon powder ultraviolet fluorescent carbon powder is divided into colored fluorescent ink and colorless fluorescent ink. The text printed by the colored fluorescent ink is visible to the naked eye, and the text printed by the colorless fluorescent ink is invisible, but both of them can show fluorescence under ultraviolet irradiation. However, the existing fluorescent anti-counterfeiting carbon powder has the problems of short fixing time, unstable properties, and is not conducive to the use of encrypted files that need to be stored for a long time. SUMMARY

[0004] In order to solve the above problems existing in the prior art, the present application provides a printer anti-counterfeiting carbon powder with stable properties, emitting fluorescence under ultraviolet light, and anti-counterfeiting performance, and a preparation method thereof.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A printer anti-counterfeiting carbon powder, the raw material components include:

[0007] 2-4 parts by weight of an ultraviolet fluorescent compound;

[0008] 70-80 parts by weight of a resin;

[0009] 2-8 parts by weight of a release agent;

[0010] 2-6 parts by weight of a charge regulator;

[0011] 1-10 parts by weight of a treatment agent.

[0012] The ultraviolet fluorescent compound is a mixture of Y2O3, Eu2O3 and Er2O3 in a molar ratio of 2-3:2-3:2-3.

[0013] The resin is a mixture of polyester resin, polypropylene resin and polyethylene resin in a mass ratio of 1-2:1-2:1-2.

[0014] The release agent is a mixture of polyethylene wax, polypropylene wax, and paraffin wax in a mass ratio of 2-5:2-5:2-5.

[0015] The charge modifier is a tert-butylsalicylic acid metal complex, preferably a zirconium 3,5-di-tert-butylsalicylic acid compound or a zinc salicylic acid metal complex. It should be noted that the 3,5-di-tert-butylsalicylic acid zirconium 3,5-di-tert-butylsalicylic acid compound or the zinc salicylic acid metal complex is obtained by referring to existing techniques or commercially available products. For example, the 3,5-di-tert-butylsalicylic acid zirconium 3,5-di-tert-butylsalicylic acid compound is obtained by reacting 3,5-di-tert-butylsalicylic acid with zirconium oxychloride.

[0016] The treatment agent is a mixture of silicon dioxide, titanium dioxide and polytetrafluoroethylene resin in a mass ratio of 1-4:1-4:1-4.

[0017] The method for preparing anti-counterfeiting toner for printers includes the following steps;

[0018] (1) Take the ultraviolet fluorescent compound, resin and charge regulator and mix them thoroughly to obtain a mixture;

[0019] (2) The mixture obtained in step (1) is kneaded. During the kneading process, a release agent is added first, followed by a treatment agent, to obtain the kneaded product.

[0020] (3) Press the compound product described in step (2) and cool it to obtain a strip;

[0021] (4) The strip obtained in step (3) is coarsely crushed to obtain coarse powder product;

[0022] (5) The coarse powder product obtained in step (4) is finely pulverized to obtain the anti-counterfeiting toner for printers.

[0023] In step (1), the mixing is performed at a high speed of 1000-2000 rpm for 20-40 min.

[0024] In step (2), the mixing is carried out at 80-120℃ for 40-60 minutes.

[0025] In step (2), after the mixing process is carried out for 10-20 minutes, the release agent is added;

[0026] After the mixing process has been carried out for 20-30 minutes, the treatment agent is added.

[0027] In step (3), the thickness of the strip is 1-2 mm, and it is water-cooled at 20-40℃;

[0028] In step (4), the particle size of the coarse powder product is 20-45 μm;

[0029] In step (5), the particle size of the powder after fine grinding is 2-8 μm.

[0030] The beneficial effects of this invention are as follows:

[0031] The anti-counterfeiting toner for printers described in this invention comprises ultraviolet fluorescent compounds, resin, release agents, charge regulators, and treatment agents in appropriate proportions. During preparation, the ultraviolet fluorescent compound, resin, and charge regulator are first mixed to obtain a mixture. This mixture is then kneaded, with the release agent and treatment agent added sequentially during the kneading process to obtain a kneaded product. The resulting kneaded product is then pressed into a strip. This strip is subsequently subjected to coarse and fine pulverization processes to obtain the anti-counterfeiting toner for printers. It fluoresces under ultraviolet light, exhibits stable properties, and possesses excellent anti-counterfeiting performance. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] In the following examples, 1 part by weight represents 1 gram. Unless otherwise specified, all raw materials described below are commercially available products.

[0034] Example 1

[0035] This embodiment provides an anti-counterfeiting toner for printers, the raw material components of which include:

[0036] Ultraviolet fluorescent powder, 2 parts by weight;

[0037] Resin, 80 parts by weight;

[0038] Release agent, 2 parts by weight;

[0039] 3,5-Di-tert-butylsalicylic acid zirconium compound, 6 parts by weight;

[0040] Treatment agent, 1 part by weight.

[0041] The ultraviolet phosphor is a mixture of Y2O3, Eu2O3, and Er2O3 in a molar ratio of 2:3:2.

[0042] The resin is a mixture of polyester resin, polypropylene resin and polyethylene resin in a mass ratio of 1:2:1;

[0043] The release agent is a mixture of polyethylene wax, polypropylene wax and paraffin wax in a mass ratio of 2:5:2;

[0044] The treatment agent is a mixture of silicon dioxide, titanium dioxide and polytetrafluoroethylene resin in a mass ratio of 1:4:1.

[0045] A method for preparing the anti-counterfeiting toner for the printer is further provided, comprising the following steps;

[0046] (1) Take ultraviolet phosphor, resin and charge control agent and mix them at a speed of 1000 rpm for 40 min to obtain a mixture;

[0047] (2) The mixture obtained in step (1) is kneaded at 80°C for 60 minutes, wherein the release agent is added after kneading for 20 minutes, and the treatment agent is added after kneading for 30 minutes to obtain the kneaded product.

[0048] (3) Press the compound product described in step (2) and cool it with water at 20°C to obtain a strip with a thickness of 1 mm.

[0049] (4) The strip obtained in step (3) is subjected to coarse crushing to obtain a coarse powder product with a particle size of 20 μm;

[0050] (5) The coarse powder product obtained in step (4) is finely pulverized to obtain fine powder with a particle size of 2μm, which is the anti-counterfeiting toner for printers.

[0051] Example 2

[0052] This embodiment provides an anti-counterfeiting toner for printers, the raw material components of which include:

[0053] Ultraviolet fluorescent powder, 4 parts by weight;

[0054] Resin, 70 parts by weight;

[0055] Release agent, 8 parts by weight;

[0056] 3,5-Di-tert-butylsalicylic acid zinc compound, 2 parts by weight;

[0057] Treatment agent, 10 parts by weight.

[0058] The ultraviolet phosphor is a mixture of Y2O3, Eu2O3, and Er2O3 in a molar ratio of 3:2:3.

[0059] The resin is a mixture of polyester resin, polypropylene resin and polyethylene resin in a mass ratio of 2:1:2;

[0060] The release agent is a mixture of polyethylene wax, polypropylene wax and paraffin wax in a mass ratio of 5:2:5;

[0061] The treatment agent is a mixture of silicon dioxide, titanium dioxide and polytetrafluoroethylene resin in a mass ratio of 4:1:4.

[0062] A method for preparing the anti-counterfeiting toner for the printer is further provided, comprising the following steps;

[0063] (1) Take ultraviolet phosphor, resin and charge control agent and mix them at a speed of 2000 rpm for 20 min to obtain a mixture;

[0064] (2) The mixture obtained in step (1) is kneaded at 120°C for 40 minutes, wherein the release agent is added after kneading for 10 minutes, and the treatment agent is added after kneading for another 20 minutes to obtain the kneaded product.

[0065] (3) Press the compound product described in step (2) and cool it with water at 40°C to obtain a strip with a thickness of 2 mm.

[0066] (4) The strip obtained in step (3) is coarsely crushed to obtain a coarse powder product with a particle size of 45 μm;

[0067] (5) The coarse powder product obtained in step (4) is finely pulverized to obtain fine powder with a particle size of 8μm, which is the anti-counterfeiting toner for the printer.

[0068] Example 3

[0069] This embodiment provides an anti-counterfeiting toner for printers, the raw material components of which include:

[0070] Ultraviolet fluorescent powder, 3 parts by weight;

[0071] Resin, 75 parts by weight;

[0072] Release agent, 5 parts by weight;

[0073] 3,5-Di-tert-butylsalicylic acid zirconium compound, 4 parts by weight;

[0074] Treatment agent, 5.5 parts by weight.

[0075] The ultraviolet phosphor is a mixture of Y2O3, Eu2O3, and Er2O3 in a molar ratio of 1:1:1.

[0076] The resin is a mixture of polyester resin, polypropylene resin and polyethylene resin in a mass ratio of 1:1:1.

[0077] The release agent is a mixture of polyethylene wax, polypropylene wax and paraffin wax in a mass ratio of 1:1:1.

[0078] The treatment agent is a mixture of silicon dioxide, titanium dioxide and polytetrafluoroethylene resin in a mass ratio of 1:1:1.

[0079] A method for preparing the anti-counterfeiting toner for the printer is further provided, comprising the following steps;

[0080] (1) Take ultraviolet phosphor, resin and charge control agent and mix them at a speed of 1500 rpm for 30 min to obtain a mixture;

[0081] (2) The mixture obtained in step (1) is kneaded at 100°C for 50 minutes, wherein the release agent is added after kneading for 15 minutes, and the treatment agent is added after kneading for 25 minutes to obtain the kneaded product.

[0082] (3) Press the compound product described in step (2) and cool it with water at 30°C to obtain a strip with a thickness of 1.5 mm.

[0083] (4) The strip obtained in step (3) is coarsely crushed to obtain a coarse powder product with a particle size of 30 μm;

[0084] (5) The coarse powder product obtained in step (4) is finely pulverized to obtain fine powder with a particle size of 5μm, which is the anti-counterfeiting toner for the printer.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A type of anti-counterfeiting toner for printers, characterized in that, The raw material components include: Ultraviolet fluorescent compound, 2-4 parts by weight; Resin, 70-80 parts by weight; Release agent, 2-8 parts by weight; Charge regulator, 2-6 parts by weight; Treatment agent, 1-10 parts by weight.

2. The anti-counterfeiting toner for printers according to claim 1, characterized in that, The resin is a mixture of polyester resin, polypropylene resin, and polyethylene resin in a mass ratio of 1-2:1-2:1-2.

3. The anti-counterfeiting toner for printers according to claim 1, characterized in that, The release agent is a mixture of polyethylene wax, polypropylene wax, and paraffin wax in a mass ratio of 2-5:2-5:2-5.

4. The anti-counterfeiting toner for printers according to claim 1, characterized in that, The ultraviolet fluorescent compound is a mixture of Y₂O₃, Eu₂O₃, and Er₂O₃ in a molar ratio of 2-3:2-3:2-3; The charge regulator is a tert-butylsalicylic acid metal complex charge regulator.

5. The anti-counterfeiting toner for printers according to claim 1, characterized in that, The treatment agent is a mixture of silicon dioxide, titanium dioxide and polytetrafluoroethylene resin in a mass ratio of 1-4:1-4:1-4.

6. The method for preparing anti-counterfeiting toner for printers according to any one of claims 1-5, characterized in that, Includes the following steps; (1) Take the ultraviolet fluorescent compound, resin and charge regulator and mix them thoroughly to obtain a mixture; (2) The mixture obtained in step (1) is kneaded. During the kneading process, a release agent is added first, followed by a treatment agent, to obtain the kneaded product. (3) Press the compound product described in step (2) and cool it to obtain a strip; (4) The strip obtained in step (3) is coarsely crushed to obtain coarse powder product; (5) The coarse powder product obtained in step (4) is finely pulverized to obtain the anti-counterfeiting toner for printers.

7. The method for preparing anti-counterfeiting toner for printers according to claim 6, characterized in that, In step (1), the mixing is performed at a high speed of 1000-2000 rpm for 20-40 min.

8. The method for preparing anti-counterfeiting toner for printers according to claim 6, characterized in that, In step (2), the mixing is carried out at 80-120℃ for 40-60 minutes.

9. The method for preparing anti-counterfeiting toner for printers according to claim 6, characterized in that, In step (2), after the mixing process is carried out for 10-20 minutes, the release agent is added; After the mixing process has been carried out for 20-30 minutes, the treatment agent is added.

10. The method for preparing anti-counterfeiting toner for printers according to claim 6, characterized in that, In step (3), the thickness of the strip is 1-2 mm, and it is water-cooled at 20-40℃; In step (4), the particle size of the coarse powder product is 20-45 μm; In step (5), the particle size of the powder after fine grinding is 2-8 μm.