Multilayer Marking Film Laser Etching Scratch Resistance
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Solution Overview
Problem
Existing marking films lack the ability to effectively display various information and prevent theft, as they deteriorate upon scratches and detachment, compromising their discriminant function.
Innovation Solution
A multilayer marking film comprising an adhesive layer, a colored base layer with a urethane (meth)acrylate oligomer, and a colored coating layer with an uneven portion, which is etched by laser irradiation, providing improved friability, durability, and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer label is used for marking, then the manufacturing process is simple, but the label lacks durability and scratch resistance
Solution Approach 1:
The label is divided into multiple functional layers: a base layer for structural support, a colored layer for information display, and a protective layer for scratch resistance. This segmentation allows each layer to perform its specific function optimally while maintaining overall durability.
Solution Approach 2:
The label uses composite material structure combining different materials with complementary properties: the base layer provides mechanical strength, the colored layer provides visual information, and the protective layer provides scratch resistance. This composite structure resolves the contradiction between manufacturing simplicity and durability.
2Reliability
If the label is made to be durable and scratch-resistant, then information integrity is maintained, but the label loses friability and cannot be crushed for theft prevention
Solution Approach 1:
The label structure is segmented into layers with different mechanical properties. The base layer and protective layer maintain durability and scratch resistance for information integrity, while the colored layer is designed with specific composition to provide controlled friability for theft prevention through crushing.
Solution Approach 2:
Different regions of the label have different local qualities: the protective layer has high hardness and scratch resistance, while the colored layer has controlled softness and friability. This local differentiation allows the label to simultaneously achieve information integrity and theft prevention functionality.
3Ease of manufacture
If the label surface is made smooth and uniform, then manufacturing is easier, but laser etching cannot create fine and varied lettering and designs
Solution Approach 1:
The colored layer is designed with specific local properties including controlled unevenness and varying thickness. These local quality variations enable laser etching to create fine and varied lettering and designs by selectively removing material to different depths, revealing different underlying layers or creating three-dimensional effects.
Solution Approach 2:
The label surface incorporates three-dimensional unevenness rather than being perfectly flat. This dimensional variation provides depth and texture that enhances laser etching capability, allowing for more detailed and varied information display while maintaining ease of manufacture through conventional coating techniques.
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 multilayer film enables fine and varied lettering, designs, and prevents scratches, maintaining information integrity and theft prevention functionality.
Implementation Method 1
the colored coating layer includes an uneven portion and is etched by laser irradiation
Data Source
AI summary
A multilayer marking film is disclosed herein. In some embodiments, a multilayer marking film includes, in sequential order, an adhesive layer, a colored base layer having a first color, and a colored coating layer having a second color, wherein information can be written by laser irradiation on the colored coating layer.