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Friction luminous antiforge printing ink and mfg. method thereof

A technology of triboluminescence and anti-counterfeiting ink, which is applied in ink, household utensils, applications, etc. It can solve the problems of disappearance, poor moisture resistance and acid resistance, increase the printing process and difficulty, etc., so as to improve the service life, moisture resistance and acid resistance. Effect

Inactive Publication Date: 2005-01-05
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the triboluminescent material has orange fluorescence under the ultraviolet lamp, and there are usually many kinds of anti-counterfeiting marks on the banknotes and securities. A coating containing UV absorbers is printed on the triboluminescent material, which increases the printing process and difficulty
Moreover, due to the poor moisture resistance and acid resistance of the triboluminescent material used in this technology, the triboluminescence function of the material is easily weakened or disappeared under normal use conditions, which affects the use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, the triboluminescent material is processed into powder with a particle size of less than 5 μm by jet pulverization method or ball milling method to remove the ultraviolet fluorescence characteristics of the material; The vacuum furnace was evacuated to 0.1Pa, then filled with nitrogen, and the nitrogen input flow was 80ml / min; the vacuum furnace was heated to 800°C, and started to vibrate, and the vibration acceleration was 6m / s 2 ; Then feed SiCl to the vacuum furnace simultaneously through two pipelines 4 High purity gas and water vapor, SiCl 4 The input flow rate of high-purity gas is 50ml / min, and the input flow rate of water vapor is 70ml / min; the reaction lasts for 30 minutes, and the waste gas is discharged after purification. After natural cooling to room temperature, stop inputting nitrogen gas, put it into the atmosphere, and take out the treated triboluminescent material; finally, put 15% of the triboluminescent material into the printing ink by weigh...

Embodiment 2

[0021] Put the triboluminescent material powder with a particle size of 5μm or less into a high-temperature vacuum furnace; evacuate to 0.2Pa, and the nitrogen flow rate is 120ml / min; raise the temperature to 900°C; start to vibrate, and the vibration acceleration is 10m / s 2 ;Enter SiCl again 4 High purity gas and water vapor, SiCl 4 The high-purity gas and water vapor flow rates were 60 ml / min and 80 ml / min, respectively, and the reaction lasted for 75 minutes. 35% of the triboluminescent material by weight is put into the printing ink to make the triboluminescent anti-counterfeiting ink.

Embodiment 3

[0023] Put the triboluminescent material powder with a particle size of 5μm or less into a high temperature vacuum furnace, evacuate to 0.28Pa, the nitrogen flow rate is 150ml / min, the temperature is raised to 1000°C, and the vibration acceleration is 16m / s 2 , then enter SiCl 4 High purity gas and water vapor, SiCl 4 The high-purity gas and water vapor flow rates were 70 ml / min and 90 ml / min, respectively, and the reaction lasted for 120 minutes. By weight, 60% of the triboluminescent material is put into the printing ink to prepare the triboluminescent anti-counterfeiting ink.

[0024] In the above embodiment, the higher the vacuum degree in the furnace, the higher the nitrogen concentration, the more stable the chemical reaction environment, the higher the vibration acceleration, the more sufficient the contact between the surface of the friction luminescent material particles and the reaction gas, and the more complete the contact between the surface of the friction lumin...

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Abstract

The invention discloses a triboluminescent anti-falsification printing ink and its making method, processing triboluminescent material into powder with particles not greater than 5 mum, eliminating the UV fluorescent property of the triboluminescent material, then coating the powder, chemically or physically, so as to coat a layer of protective film made from the materials with strong wet-fastness and acid resistance, then casting the triboluminescent material in the printing ink in a certain proportion to make the anti-falsification printing ink. The invention also discloses a CVD modifying method of generating SiO2 films on the surfaces of the triboluminescent material powder, which is a chemical processing method. The anti-falsification printing ink does not emit fluorescence under the irradiation of UV lamp, and has stable chemical and physical properties, long service life and can be used in print the anti-falsification marks for bank notes, valuable papers, etc.

Description

technical field [0001] The invention relates to a triboluminescence anti-counterfeiting ink for printing and a manufacturing method thereof. Background technique [0002] British Patent GB2232119A discloses a method of putting triboluminescent material into printing ink in a certain proportion to make anti-counterfeiting ink for printing securities. However, the triboluminescent material has orange fluorescence under ultraviolet light, and there are usually many kinds of anti-counterfeiting marks on banknotes and securities. A coating containing an ultraviolet absorber is printed on the triboluminescent material, which increases the printing process and difficulty. In addition, due to the poor moisture resistance and acid resistance of the triboluminescent material used in this technology, the triboluminescent function of the material is easily weakened or disappeared under general use conditions, which affects the use. SUMMARY OF THE INVENTION [0003] In view of the pr...

Claims

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Application Information

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IPC IPC(8): C09D11/50
Inventor 张昆峻张莉唐士立李欢
Owner CHINA BANKNOTE PRINTING & MINTING