Touch Panel Electrode Protective Film Composition
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Solution Overview
Problem
Existing touch panel electrode protective films lack sufficient bending resistance and adhesiveness, and have high coefficients of static friction, which hinders their performance in curved surfaces and visibility reduction.
Innovation Solution
A composition comprising a compound represented by Formula 1, a binder polymer, a photopolymerization initiator, and a monomer with a carboxy group, where the compound content is between 5% to 50% by mass, forming a protective film with low static friction, excellent bending resistance, and strong adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transparent resin layer with high refractive index is formed on the transparent electrode pattern, then the visibility of the transparent electrode is reduced, but the bending resistance and adhesiveness are insufficient
Solution Approach 1:
The patent uses a composite resin composition containing multiple components: a polyfunctional monomer (Component A), binder polymer (Component B), photopolymerization initiator (Component C), and silane coupling agent (Component D). This composite material approach allows simultaneous achievement of high refractive index (visibility reduction), excellent bending resistance, and strong adhesiveness to the transparent electrode pattern.
Solution Approach 2:
The patent optimizes specific parameter ranges: Component A content at 1-50% by mass, Component D at 0.1-10% by mass, and silane coupling agent at 0.1-5% by mass. These parameter adjustments enable the resin layer to achieve both optical properties (refractive index for visibility reduction) and mechanical properties (bending resistance and adhesiveness).
2Reliability
If a protective film is formed with conventional composition, then the basic protection is provided, but the coefficient of static friction is high and bending resistance is poor
Solution Approach 1:
The patent modifies the chemical composition parameters by incorporating specific components in optimized ratios: polyfunctional monomer (1-50%), binder polymer (balance), photopolymerization initiator (1-10%), and silane coupling agent (0.1-5%). This composition adjustment reduces the coefficient of static friction while maintaining protective film functionality.
Solution Approach 2:
The silane coupling agent provides localized adhesion enhancement at the interface between the protective film and the transparent electrode pattern, while the overall composition maintains low friction on the film surface. This local quality approach addresses both adhesion and friction requirements simultaneously.
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 composition provides a protective film with improved bending resistance, low static friction, and enhanced adhesiveness to touch panel electrodes, suitable for curved surfaces and reduced visibility of transparent electrodes.
Implementation Method 1
a photopolymerization initiator as Component C
Data Source
AI summary
The composition contains a compound represented by Formula 1, a binder polymer, a photopolymerization initiator, and a monomer having a carboxy group, in which the content of the compound represented by Formula 1 is 5% by mass or more and less than 50% by mass with respect to the total mass of monomer components, and in Formula 1, Q1 and Q2 each represent a (meth)acryloyloxy group, and R1 represents a divalent linking group having a chain-like structure.Q2-R1-Q1 (1)