Anti-counterfeiting fiber, its manufacturing method, and security paper and security article using the same

Abstract

Provided are an anti-counterfeit fiber, a preparation method therefor and a safety paper and a safety article using same. The anti-counterfeit fiber has a multilayered structure in the length direction, wherein any two adjacent layers of the multilayered structure are fixedly bonded, and at least one layer of which has different chemical components from the adjacent layer thereof, and at least one layer of which contains an additive having anti-counterfeit information inside. The method for producing the anti-counterfeit fiber is as follows: a sheet having a multilayered structure in the thickness direction is firstly prepared; then the sheet is processed into an anti-counterfeit fiber having a multilayered structure in the length direction through cutting. The anti-counterfeit characteristic of the anti-counterfeit fiber of a safety paper using the anti-counterfeit fiber and a safety article produced with the safety paper cannot be reproduced using methods of printing and the like, enhancing the anti-counterfeit ability.

Description

technical field [0001] The invention relates to an anti-counterfeiting fiber and a manufacturing method thereof, in particular to an anti-counterfeiting fiber with a multi-layer structure and a manufacturing method thereof. Background technique [0002] Security objects, such as banknotes, securities or the like, need to be provided with specific security features in order to prevent counterfeiting and to verify their authenticity. It is a known technology to use anti-counterfeiting fibers as the anti-counterfeiting features of banknotes and securities. They are generally composed of short organic synthetic polymers and cotton fibers, and are introduced into paper during papermaking. [0003] Anti-counterfeiting fibers with a single structure in the length direction and anti-counterfeiting fibers with a single anti-counterfeiting feature have been widely used in anti-counterfeiting papers such as banknote paper, bond paper, and bill paper, but paper containing this type of a...

AI Technical Summary

Problems solved by technology

The disadvantage of this anti-counterfeiting fiber is that inks of various colors can be printed on the surface of the film by over-printing, and then the film is cut into fibers, and the printed layer is also easy to fall off from the surface of the fiber, thus affecting the anti-counterfeiting performance

[0007] Printing inks of various colors on the surface of the film by printing, and then cutting the film into fibers, its segmentation characteristics come from the ink printed on the film substrate, and the film substrate does not have segmentation characteristics, the fiber In the length direction, only part of the structure has segmental features, and there are segmental features that are different when the viewing direction is different. When the film substrate has color or opaque features, the directional difference is more obvious, resulting in the characteristics of the fiber being detected and observed. showing inconsistency

In addition, the segmentation fineness of the above-mentioned fibers is determined by the fineness of the printing lines, so it is difficult to achieve very fine fiber color segments in segmentation

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