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Alteration resistant paper and preparation method thereof

A technology of anti-alteration paper and offset paper, which is applied in papermaking, paper, textiles and papermaking, etc. It can solve the problems of narrow anti-counterfeiting range, short paper life, and short life, and achieve good durability, anti-alteration and forgery, and excellent sensitivity Effect

Active Publication Date: 2013-05-22
BAODING BANKNOTE PAPER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Anti-alteration paper started early abroad and developed rapidly. The anti-alteration paper that first appeared in France was filled with phenolic substances in the paper. However, because of the oxidative properties of phenolic substances, the life of this paper is very short.
Later, Japan, Britain, Germany and other countries adopted the method of adding certain metal complexes, acid-base indicators, tannic acid, phenols and other aromatic organic substances, which have a narrow anti-counterfeiting range and are only effective for a certain type of correction fluid. ; Paper life is short; in the atmospheric environment, it is easy to change color and other disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The production is carried out according to the ordinary offset paper process. The transparent violet B dye is added in the papermaking tank, and after mixing evenly, the melamine formaldehyde resin (retention aid) is added. The amount of the transparent violet B dye is 0.05% of the total weight of the anti-correction paper, and the retention aid The dosage is 3% of the total weight of the anti-aliasing paper, which is made on the Internet, and is formed, pressed, surface sized, dried, and calendered.

[0051] It was altered with organic solvents such as ethanol, acetone, benzene, etc., and purple traces appeared on the paper. Paper strength, whiteness, chroma, printing performance, etc. are not affected. According to GB464.1-89, after aging, after the aging, use organic solvents such as ethanol, acetone, benzene and other organic solvents to modify the test, purple traces still appear on the paper. After the paper was exposed to the sun for a week, there was no significan...

Embodiment 2

[0053] It is produced according to the ordinary offset paper process. Add blue 67 dye to the beating tank. After mixing evenly, add propylene oxide. The amount of blue 67 dye is 0.003% of the total weight of the anti-corruption paper, and the amount of propylene oxide is the total weight of the anti-corruption paper. 0.6% of the weight, made on the Internet, after forming, pressing, surface sizing, drying, calendering and winding. It is altered with organic solvents such as ethanol, acetone, benzene, etc., and blue marks appear on the paper.

Embodiment 3

[0055] Production is carried out according to the ordinary offset paper process. Add yellow 88 dye to the pulping tank. After mixing evenly, add cationic starch. The amount of yellow 88 dye is 0.2% of the total weight of the anti-correction paper, and the amount of cationic starch is the total weight of the anti-correction paper. 10% of it is made by copying on the Internet, after forming, pressing, surface sizing, drying, calendering and winding. Use organic solvents such as ethanol, acetone, benzene, etc., and yellow marks appear on the paper.

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Abstract

The invention relates to alteration resistant paper and a preparation method thereof, which can be widely applied in alteration resisting and counterfeiting of securities, certificates, bills, confidential documents and the like. The alteration resistant paper comprises counterfeiting substances, and each square meter of alteration resistant paper comprises 0.03 to 3 grams of counterfeiting substances; and the counterfeiting substances comprise a cobalt compound and an induction agent containing manganese ions in the molar ratio of 1:1-10:1. The alteration resistant paper can be manufactured on common long screen and circular screen paper machines, can be compatible with counterfeiting characteristics of watermarks, safety lines, special fibers and the like, has high inductivity for correction fluid such as an organic solvent, acid, alkali, an oxidant, a reducing agent, a word removing agent and the like, has high durability, and can effectively prevent alteration and counterfeiting; and the invention has the characteristics that: the alteration resistant paper is easy to identified publicly and is difficult to counterfeit.

Description

[0001] This application is a divisional application of the invention patent application with the application number 200910176476.X, the filing date being September 16, 2009, and the invention titled "An anti-aliasing paper and its preparation method". Technical field [0002] The invention relates to an anti-aliasing paper and a preparation method thereof. The anti-aliasing paper can be widely used for anti-aliasing and anti-counterfeiting of securities, certificates, bills, confidential documents and the like. Background technique [0003] With the advancement of science and technology and economic development, many securities, certificates, and confidential documents have been threatened by alteration and forgery. Many criminals have used alteration and forgery to conduct fraudulent activities, disrupting normal financial and social order. A series of anti-aliasing technologies came into being. The laminating technology aims to prevent alteration and forgery. The anti-aliasing in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/46D21H23/22
Inventor 粟婉曹秀痕陈义清黄磊王炳强苏秀军李亚娟陈韦
Owner BAODING BANKNOTE PAPER CO LTD
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