Multilayer Marking Film Laser Etching Friability
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Solution Overview
Problem
Existing multilayer marking films lack sufficient friability and security features to prevent forgery and alteration, as they are not easily destroyed by external forces when removed from adherends.
Innovation Solution
A multilayer marking film comprising an adhesive layer, a colored base layer with a first color, and a colored coating layer with a second color, where the colored base layer includes a cured material of a base composition containing a urethane (meth)acrylate oligomer and (meth)acrylate monomers, and the colored coating layer is etched by laser irradiation, enhancing friability and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a multilayer marking film is designed to be durable and resistant to external forces, then its attaching property and durability are improved, but its friability and security against forgery are reduced
Solution Approach 1:
The marking film is divided into multiple layers with different functions: a base layer for durability and attaching properties, and a colored coating layer for marking and friability. This segmentation allows each layer to optimize its specific function without compromising the overall performance.
Solution Approach 2:
Different layers of the film have different material compositions and properties tailored to their specific functions. The base layer uses materials optimized for strength and adhesion, while the colored coating layer uses materials that provide both coloration and controlled friability when exposed to laser irradiation.
2Duration of action of stationary object
If the colored coating layer is made highly durable and resistant to destruction, then its durability is improved, but its ability to be easily etched by laser irradiation is reduced
Solution Approach 1:
The material composition of the colored coating layer is specifically designed with parameters that allow it to undergo controlled changes when exposed to laser irradiation. The layer contains materials that absorb laser energy and undergo phase changes or decomposition at specific thresholds, enabling precise etching while maintaining durability under normal conditions.
Solution Approach 2:
The colored coating layer is composed of multiple materials with complementary properties: pigments for coloration, binders for adhesion and durability, and specific additives that control the response to laser irradiation. This composite structure allows the layer to exhibit both durability during normal use and controlled etchability during the marking process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The film exhibits improved friability, preventing forgery and alteration by being easily destroyed by small external forces, while maintaining excellent interfacial attaching properties and durability, ensuring secure and long-term information integrity.
Implementation Method 1
the colored coating layer is etched by laser irradiation
Implementation Method 2
a UV-curable oligomer or an electron beam-curable oligomer
Data Source
Figure 1~2A
Figure 2B~3A
Figure 3B
AI summary
An exemplary embodiment of the present invention provides a multilayer marking film including: an adhesive layer; a colored base layer having a first color; and a colored coating layer having a second color, in which the first color and the second color are different from each other, the colored coating layer, the colored base layer, and the adhesive layer are sequentially provided, the colored base layer includes a cured material of a base composition including: a urethane (meth)acrylate oligomer; a (meth)acrylate monomer including one or more selected from the group consisting of a cyclo-aliphatic (meth)acrylate monomer, an epoxy-based (meth)acrylate monomer, an aliphatic (meth)acrylate monomer, and a polyol-based (meth)acrylate monomer; and a pigment, and the colored coating layer is etched by laser irradiation.