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Production method for anti-counterfeiting paper

The technology of one paper and the other side, applied in papermaking, paper coatings, textiles and papermaking, etc., can solve the problems of slow production speed, difference in paper transparency, difficult UV curing, etc., and achieve the effect of excellent anti-counterfeiting effect and uniform thickness.

Active Publication Date: 2013-07-03
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares transparent paper, and the general production speed is slow, which is not suitable for continuous industrial production.
Also, the transparency properties of paper can vary significantly due to differences in paper structure
In recent years, by printing, the continuous application of paper transparent agent can be realized after UV curing of transparent agent (for example, see US6103355), but this method is more difficult for thicker paper application and UV curing
In addition, the surface sizing of the paper will have a greater impact on this method, and the transparency of the paper is not good.
It is difficult to form a high-transparency paper with the use of a transparent agent, and paper fillers, such as titanium dioxide, may have a greater impact on the application performance of the transparent agent

Method used

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  • Production method for anti-counterfeiting paper
  • Production method for anti-counterfeiting paper
  • Production method for anti-counterfeiting paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Below, refer to figure 1 This Example 1 will be described.

[0082] First, the commercially available paper is thinned by using the thinning step of US4814043, so as to obtain the paper with the structure shown in a. Then, a first coating material is applied to the thinned paper by screen printing to obtain a paper having a structure as shown in b. Turn the paper over to get the paper shown in c. Repeating the thinning step (to expose the first coating material) and the application step with this inverted sheet results in a sheet with a security window as shown in d. The specific composition of the first coating material described here is shown in Table 1, and the content percentage is in weight, the same below.

[0083] The composition of the first coating material in table 1 embodiment 1 (suitable for UV curing screen printing)

[0084] Material

Embodiment 2

[0086] Basically the same as Example 1, but the difference is that, by controlling the depth of thinning or applying the coating material, to have a window containing a hollow paper image as shown in e (the specific steps are carried out with reference to US4814043, no longer here Repeat), so as to obtain a transparent or translucent window effect.

Embodiment 3

[0088] It is basically the same as in Example 1, but the difference is that the coating material is applied by means of blade coating (see Table 2 for its composition), and the first and second coating materials are the same, and the paper with the anti-counterfeit window shown in d is still obtained .

[0089] The composition of coating material among the table 2. embodiment 3 (applicable to UV curing blade coating process)

[0090] Material

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PUM

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Abstract

The invention provides a method for producing anti-counterfeiting paper such as paper money, certificates, book paper and bills. The method comprises the following steps of: a) providing raw material paper with a sunken part at one side, and preferably, polishing the edge of the sunken part; b) applying a first coating material on one side of the paper with the sunken part, at least filling the first coating material in the sunken part, and preferably, mould-pressing the side, thus obtaining a flat surface; c) polishing the other side of the paper until the first coating material is exposed, thus forming a window area in the paper, and preferably, performing the polishing in the step c) and the mould-pressing in the step b) simultaneously; and d) optionally, applying a second coating material on the other side of the polished paper, thus generating a flat surface on the side.

Description

technical field [0001] The invention relates to a production method of anti-counterfeiting paper. More specifically, the present invention relates to a method for producing anti-counterfeit paper with windows. Background technique [0002] Window anti-counterfeiting technology was first applied on plastic banknote substrates. Because of its unique appearance and excellent anti-counterfeiting effect, it has attracted widespread attention. The paper substrate also introduces window features through a variety of composite methods. [0003] At present, the method for forming windows on paper is generally by forming perforations on paper earlier, by super-wide security thread (as disclosed in WO03085193), pasting film (as disclosed in DE4334848), laminating film (as disclosed in DE4334848) WO2004028825) or paper composite (as disclosed in WO2006066431) to form windows on the paper substrate. These methods of compounding to form windows generally have a distinct multilayer str...

Claims

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Application Information

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IPC IPC(8): D21H21/40D21H19/60D21H19/28
Inventor 唐士立韩丽琴刘卫东张鲁晶胡自力杨志洪张树荣李鸿斌
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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