Window Cover Film Adhesion Layer for Flexible Displays
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Solution Overview
Problem
Existing window cover films for portable touch screen displays lack sufficient wear resistance, scratch resistance, and fingerprint wipeability, and are prone to damage from abrasion and external compounds due to poor interlayer binding forces and surface energy issues.
Innovation Solution
A window cover film comprising a substrate layer, a hard coating layer, an adhesion enhancement layer formed from an alkoxysilane compound with functional groups, and an antifouling layer formed from a fluorine-containing alkoxysilane compound, which enhances interlayer binding force and provides improved wear resistance, scratch resistance, and fingerprint wipeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a hydrophobic antifouling layer is formed on the window cover film, then fingerprint resistance and slip properties are improved, but interlayer binding force deteriorates due to low surface energy
Solution Approach 1:
An adhesion enhancement layer comprising an alkoxysilane compound is introduced between the hard coating layer and the antifouling layer. This intermediary layer acts as a chemical bridge, forming strong covalent bonds with both the hard coating layer (through silane coupling) and the antifouling layer, thereby resolving the low surface energy problem of the hydrophobic material while maintaining excellent fingerprint resistance and slip properties.
Solution Approach 2:
The window cover film is constructed as a multi-layer composite structure combining a hard coating layer (for wear and scratch resistance), an adhesion enhancement layer (for strong interlayer bonding), and an antifouling layer (for fingerprint resistance). This composite structure integrates the advantages of each material while compensating for their individual deficiencies, achieving both high durability and excellent surface properties.
2Adaptability or versatility
If polymer plastic base materials are used instead of tempered glass, then flexibility and impact resistance are improved, but hardness and scratch resistance deteriorate
Solution Approach 1:
A composite structure is employed where a polymer plastic substrate (提供ing flexibility and impact resistance) is combined with a hard coating layer (提供ing scratch and wear resistance). The hard coating layer is applied on the plastic substrate and cured to form a durable protective surface, allowing the window cover film to maintain both flexibility and high scratch resistance, overcoming the limitations of single-material solutions.
3Strength
If a hard coating layer is applied on the plastic base material, then scratch resistance and wear resistance are improved, but interlayer binding force deteriorates
Solution Approach 1:
The adhesion enhancement layer comprising an alkoxysilane compound serves as a chemical intermediary between the hard coating layer and the plastic substrate. The alkoxysilane groups form strong covalent bonds with both the hard coating layer and the substrate, creating a robust chemical bridge that significantly improves interlayer adhesion and prevents delamination, while the hard coating layer maintains its scratch and wear resistance properties.
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 achieves excellent wear resistance, scratch resistance, and fingerprint wipeability, maintaining its properties over time and minimizing damage or staining, with a water contact angle of 90° or more and a coefficient of dynamic friction less than 0.15, while providing a glass-like touch and slip properties.
Implementation Method 1
an adhesion enhancement layer formed from a composition for forming an adhesion enhancement layer comprising an alkoxysilane compound having one or two or more functional groups
Implementation Method 2
formed from a composition for forming an adhesion enhancement layer comprising an alkoxysilane compound having one or two or more functional groups, formed on the hard coating layer
Implementation Method 3
an antifouling layer formed from a composition for forming an antifouling layer comprising a fluorine-containing alkoxysilane compound
Implementation Method 4
having fluorine and silicon elements... excellent antifouling properties even after exposure to abrasion, vibration, and compounds for a long time, for example, satisfying a water contact angle of 90° or more
Data Source
AI summary
Provided are a window cover film, a method of manufacturing the same, and a flexible display panel including the same. More particularly, a window cover film having an excellent interlayer binding force between each layer to have significantly improved wear resistance, scratch resistance, fingerprint wipeability, and the like, while also having excellent surface properties such as a sense of touch and slip properties, a method of manufacturing the same, and a flexible display panel including the same are provided.