Method for producing lenticular-lens-based security image film having micronic thickness

Abstract

Disclosed is a method for producing a lenticular-lens-based security image film having a micronic thickness. The security image film production method according to the present invention comprises thesteps of: (a) applying a liquid first ultraviolet-curable resin (21) onto a substrate (20); (b) transferring a first lenticular lens pattern (220) to the upper surface of the first ultraviolet-curableresin (21); (c) applying a second ultraviolet-curable resin (23) onto the first ultraviolet-curable resin (21); (d) transferring the pattern surface of a second mold (24), on which a second lenticular lens pattern (240) is formed, to the upper surface of the second ultraviolet-curable resin (23); (e) applying a third ultraviolet-curable resin (25) onto the second ultraviolet-curable resin (23); and (f) transferring the pattern surface of a third mold (26), on which a security image pattern (260) is formed, to the upper surface of the third ultraviolet-curable resin (25) applied according to step (e).

Description

technical field [0001] The present invention relates to a method of manufacturing a security image film, and more particularly, to a method of manufacturing a lenticular lens-based security image film formed into a micron unit thickness. Background technique [0002] Developed a three-dimensional film manufacturing method that uses microlenses such as transparent plastic lenticular lenses to enlarge the lower part of the pattern and recognize it as a three-dimensional image with the naked eye. The three-dimensional thin film manufacturing method described above is suitable for labels for displaying authentic products or various security industries, and is manufactured by using a micro-optical security film using a high-precision small mold. In order to form a three-dimensional image, the convergence of lenticular lenses of transparent plastic materials is accurately superimposed on the printing surface, and a three-dimensional image is displayed through the action of the len...

AI Technical Summary

Problems solved by technology

[0006] However, in order to manufacture the above-mentioned conventional three-dimensional lens sheet or label for authenticity verification, a base layer film shape is formed between the lens layer and the image pattern layer, but the base layer film is formed when optical layers such as the lens layer and the image pattern layer are formed. , to limit its thickness and refractive index, between the lens layer and the base layer film and the base layer film and the image pattern layer, the difference in refractive index causes the image to be deformed, so there is a problem of blurring

[0007] In addition, according to the above-mentioned prior art, there is a limitation that the overall thickness becomes thicker in the formation process of each layer, and the lens layer and the image pattern layer must be formed on the upper and lower surfaces of the base layer film. , it is necessary to flip the intermediate process items, thus, there is a problem of cumbersome manufacturing process and low yield

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