Anti-counterfeiting fiber, anti-counterfeiting paper containing anti-counterfeiting fiber and manufacturing methods of anti-counterfeiting fiber and anti-counterfeiting paper

Abstract

The invention provides an anti-counterfeiting fiber formed by cutting along the transverse direction of a strip-shaped fiber and having an integrated point-line structure, anti-counterfeiting paper containing the anti-counterfeiting fiber and manufacturing methods of the anti-counterfeiting fiber and the anti-counterfeiting paper; the anti-counterfeiting fiber has the integrated point-line structure formed by cutting along the transverse direction of the strip-shaped fiber; the point-line structure comprises one or more flat-structure points and one or more connection lines which are connected with each other; the point-line structure comprises a specific color structure extending along the length direction of the strip-shaped fiber and passing through in the same direction; the specific color structure has the color visual characteristics, and the color visual characteristics refer to color characteristics directly or indirectly perceived by human eyes; the anti-counterfeiting fiber is produced by unique equipment, has the advantages of good controllability of size and image color block alignment, shape and size diversification, and rich color characteristics, and cannot be prepared through a process of printing a thin film and then cutting or printing a thin film and then stamping, and has good anti-counterfeiting effect.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting, and in particular relates to an anti-counterfeiting fiber, an anti-counterfeiting paper containing the anti-counterfeiting fiber and a manufacturing method thereof. Background technique [0002] As an important anti-counterfeiting method, paper-making anti-counterfeiting materials have been widely used in various anti-counterfeiting fields. For example, almost all banknote paper in the world uses paper-making anti-counterfeiting materials. Further, almost all paper-making anti-counterfeiting materials use anti-counterfeiting fibers. The shapes all adopt strip thin lines, but flaky (for example, simple point) anti-counterfeiting fibers are rarely used. The reasons are as follows: first, the visual characteristics of strip thin lines are easy to capture, compared with The visual characteristics of other shapes with the same surface area are the most obvious; second: thin strips are easy...

AI Technical Summary

Problems solved by technology

The manufacturing process of this kind of anti-counterfeiting fiber is to print color strips on the film first, and then cut them into long strips with a knife. Since this process is very simple, the printing used is ordinary printing, and the cut The knife is a common cutter, which is a general-purpose device available everywhere on the market, so its anti-counterfeiting effect has been greatly reduced; moreover, the cutting knife process is costly and cannot be cut into very thin filaments (the width of the anti-counterfeiting fiber is limited by the limit), which is very harmful to the adhesion of papermaking; in addition, limited by the printing process, the color and visual characteristics of the obtained anti-counterfeiting fiber are relatively simple, and it is relatively easy to imitate it, and its anti-counterfeiting effect is not enough to meet the increasingly high Anti-counterfeiting requirements; the colors formed by printing methods in the process have problems in terms of wear resistance and resistance to harsh environments

If those skilled in the art try to make the strip-shaped fibers formed by printing the film and slitting with a cutter into a dot-line structure, then since the dot-line structure is a more complicated structure different from equal-width strip fibers, the cutting by the knife cannot be realized. However, it needs to be completed by stamping process. The biggest disadvantage of the dot-line structure printed film obtained by stamping process is that its size is limited and can only be made into a larger size. Accordingly, it can only be used as a security thread for papermaking, and cannot be used as an anti-counterfeiting fiber for papermaking. ;In addition, even if there are new equipment in the future that can punch small-sized dot-line structures, it will not be able to solve the problem of accurate alignment between colors and patterns when small-sized punching

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