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Alteration resistant paper and preparation method thereof

An anti-tampering technology for paper and substances, applied in papermaking, paper, textiles and papermaking, etc., can solve the problems of narrow anti-counterfeiting range, short paper life, easy discoloration, etc. Effect

Active Publication Date: 2011-09-07
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] Produce according to ordinary offset paper process, add transparent purple B dye in the papermaking pool, after mixing evenly, add melamine formaldehyde resin (retention aid), the consumption of transparent purple B dye is 0.05% of the total weight of anti-alteration paper, retention aid The dosage is 3% of the total weight of the anti-alteration paper, which is copied on the Internet, formed, pressed, surface sized, dried, and calendered.

[0051] If it is altered with organic solvents such as ethanol, acetone, and benzene, there will be purple marks on the paper. Paper strength, whiteness, chroma, printing performance, etc. were not affected. According to the provisions of GB464.1-89, aging is carried out. After aging, it is tested with organic solvents such as ethanol, acetone, and benzene, and purple traces still appear on the paper. After the paper was exposed to the sun for a week, there was no significant change in the appearance of the paper surface. If it was ...

Embodiment 2

[0053] Production is carried out according to the ordinary offset paper process, blue 67 dye is added in the beating tank, and after mixing evenly, propylene oxide is added. The amount of blue 67 dye is 0.003% of the total weight of the anti-alteration paper, and the amount of propylene oxide is the total weight of the anti-alteration paper. 0.6% by weight, copied on the Internet, after forming, pressing, surface sizing, drying, calendering and coiling. Altered with organic solvents such as ethanol, acetone, benzene, etc., there will be blue traces on the paper.

Embodiment 3

[0055] According to the common offset paper process, add yellow 88 dye into the pulp tank, mix evenly, add cationic starch, the amount of yellow 88 dye is 0.2% of the total weight of the anti-alteration paper, and the amount of cationic starch is the total weight of the anti-alteration paper 10% of the raw material is copied on the Internet, and is coiled after forming, pressing, surface sizing, drying, and calendering. Altered with organic solvents such as ethanol, acetone, benzene, etc., there will be yellow marks 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 application date is September 16, 2009, and the invention title is "An anti-alteration paper and its preparation method". technical field [0002] The invention relates to an anti-alteration paper and a preparation method thereof. The anti-alteration paper can be widely used in anti-alteration and anti-counterfeiting of securities, certificates, bills, confidential documents and the like. Background technique [0003] With the advancement of science and technology and the development of the economy, many securities, certificates, and confidential documents are threatened by being altered and forged. Many criminals use the means of altering and forging to carry out fraudulent activities, disrupting the normal financial order and social order. A series of anti-alteration technologies have emerged as the times require. The purpose of lamination ...

Claims

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Application Information

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Patent Type & Authority Applications(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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