Fluorinated Surface Layer Balancing Film Adhesion and Stain Removal
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Solution Overview
Problem
The adhesion between the surface layer formed by a fluorinated ether compound and a protective film is insufficient, leading to potential peeling during storage or transportation, and dust entry into the gap between the film and the surface layer.
Innovation Solution
A surface layer containing groups with —O— between carbon-carbon atoms of a fluoroalkyl group with two or more carbon atoms, and a normalized F intensity of 0.38 to 0.53, formed from a fluorinated ether compound with reactive silyl groups, enhances adhesion to a protective film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surface layer is formed using a fluorinated ether compound with perfluoropolyether chains and hydrolyzable silyl groups, then fingerprint stain removability and friction resistance are improved, but adhesion to protective film deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the molecular weight of the fluoroalkyl group within a specific range (1,500 to 4,000) and controlling the normalized F intensity (0.38 to 0.53). These parameter adjustments optimize the balance between maintaining fingerprint stain removability and friction resistance while improving adhesion to protective films. The controlled molecular weight and fluorine content create optimal surface properties for both performance and adhesion.
Solution Approach 2:
The patent uses composite material principles by combining the fluorinated ether compound with specific molecular weight constraints and controlled fluorine content to create a surface layer that integrates multiple functions. The composite structure of the surface layer, with its specific composition ratios and molecular characteristics, enables simultaneous achievement of low friction, stain removability, and improved protective film adhesion.
2Reliability
If a surface layer is formed using a fluorinated ether compound, then water and oil repellency are improved, but adhesion to protective film deteriorates
Solution Approach 1:
The patent resolves this contradiction by precisely controlling parameters including the molecular weight of the fluoroalkyl group (1,500 to 4,000) and the normalized F intensity (0.38 to 0.53). These parameter optimizations maintain the hydrophobic and oleophobic properties essential for water and oil repellency while simultaneously improving the adhesion strength to protective films through controlled surface composition.
3Reliability
If the surface layer has high fluorine content, then friction resistance and fingerprint stain removability are improved, but adhesion to protective film deteriorates
Solution Approach 1:
The patent applies parameter changes by establishing an optimal range for normalized F intensity (0.38 to 0.53) that balances friction resistance and fingerprint stain removability with adhesion to protective films. This controlled fluorine content optimization ensures that the surface layer maintains its low-friction, easy-clean properties while achieving sufficient bonding strength for protective film attachment.
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 surface layer exhibits excellent fingerprint stain removability, friction resistance, and improved adhesion to protective films, maintaining performance over time.
Implementation Method 1
a fluorinated ether compound having perfluoropolyether chains and multiple hydrolyzable silyl groups
Implementation Method 2
a fluorinated ether compound containing perfluoropolyether chains and hydrolyzable silyl groups is suitable for use in a surface treating agent because it can form a surface layer on the surface of a base material, that exhibits high lubricity, water and oil repellency
Implementation Method 3
a fluorinated ether compound containing perfluoropolyether chains and hydrolyzable silyl groups is suitable for use in a surface treating agent because it can form a surface layer on the surface of a base material, that exhibits high lubricity
Data Source
AI summary
An article with a surface layer, that is excellent in fingerprint stain removability, friction resistance, and adhesion to a protective film of the surface layer. The article includes a base material and a surface layer provided on the surface of the base material. The surface layer contains groups having —O— between carbon-carbon atoms of a fluoroalkyl group with two or more carbon atoms and has a normalized F intensity in a range of 0.38 to 0.53, where the normalized F intensity is obtained by preparing a glass containing 4.96 mass % of fluorine atoms as a standard sample, measuring, by an X-ray fluorescence spectrometer, the fluorine atom intensity in the surface layer and the fluorine atom intensity in the standard sample, respectively, and dividing the fluorine atom intensity in the surface layer by the fluorine atom intensity in the standard sample.