UV-Curable Infrared Ink Composition for High-Temperature Stability
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Solution Overview
Problem
Infrared ink layers used in touch window manufacturing for mobile devices suffer from discoloration and deformation during high temperature processes, affecting infrared sensor performance and increasing processing time and cost due to existing protective methods.
Innovation Solution
An ultraviolet curable and infrared permeable ink composition for inkjet printing, comprising organic black pigments like perylene black or lactam black, acryl monomers with multiple functional groups, and a photo-initiator, which maintains 80% transmittance at infrared wavelengths and surface hardness even after high-temperature heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent protective layer is formed on top of the infrared ink layer to protect it during high temperature processes, then the infrared ink layer is protected from damage, but processing time and cost are increased due to added processes
Solution Approach 1:
The patent extracts and removes the separate protective layer requirement by incorporating protective functionality directly into the infrared ink layer composition itself. The infrared ink is formulated with heat-resistant pigments and stabilizers that provide inherent protection during high temperature electrode deposition, eliminating the need for additional protective layer processes.
Solution Approach 2:
The patent merges the protective function with the infrared ink layer by combining heat-resistant organic pigments, stabilizers, and infrared-absorbing materials into a single integrated composition. This unified approach allows the infrared layer to simultaneously perform its sensing function and resist thermal damage during manufacturing processes.
2Reliability
If a transparent protective layer is formed on top of the infrared ink layer, then the infrared ink layer is protected from damage, but manufacturing complexity and cost are increased
Solution Approach 1:
The patent removes the separate protective layer step from the manufacturing process by integrating thermal protection capabilities into the infrared ink formulation itself, simplifying the overall manufacturing workflow.
Solution Approach 2:
The infrared ink composition is designed to perform multiple functions simultaneously: providing infrared absorption for sensor operation, maintaining structural integrity during high temperature processing, and eliminating the need for separate protective layers, thereby reducing manufacturing complexity.
3Productivity
If high temperature heat treatment is performed during curing and drying, then curing and drying are effective, but discoloration and deformation of the infrared ink occur
Solution Approach 1:
The patent modifies the chemical composition parameters of the infrared ink by incorporating heat-resistant organic pigments (such as quinacridone, isoindolinone, and perylene types) and thermal stabilizers that maintain structural stability at high temperatures, allowing effective curing without discoloration or deformation.
Solution Approach 2:
The patent creates a composite infrared ink formulation combining organic pigments with specific thermal stabilizers and infrared-absorbing compounds, where the synergistic interaction of components provides both heat resistance and infrared functionality, enabling high temperature processing without performance degradation.
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 ink composition prevents discoloration and deformation, ensuring constant infrared transmissivity and surface hardness, reducing processing time and cost by maintaining transmittance change within 1% and adhesive force at high temperatures, thus enhancing the stability and efficiency of infrared sensor coatings.
Implementation Method 1
ultraviolet curable and infrared permeable ink composition for an inkjet
Data Source
AI summary
The present invention relates to an ultraviolet curable and infrared permeable ink composition for an inkjet, having enhanced high temperature resistance, which exhibits constant infrared transmissivity, surface hardness, and the like by preventing the discoloration and the deformation thereof even if a high temperature-heat treatment is performed during curing, drying, and the like.