Perfluoropolyether Coating for Invisible Anti-Fingerprint Surfaces
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Solution Overview
Problem
Existing technologies fail to effectively prevent or suppress fingerprints on surfaces of products such as display devices, affecting their performance and appearance.
Innovation Solution
A composition comprising a perfluoropolyether compound with specific organic and fluorine-free ends, dissolved in an organic solvent, is used to create a fingerprint invisibility coating, which forms a layered structure with enhanced water contact angle and low coefficient of friction, making fingerprints invisible and easily removable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional coatings are applied to prevent fingerprints, then the surface gains some protective properties, but the coatings fail to make fingerprints invisible and easily removable
Solution Approach 1:
The patent changes the chemical and physical parameters of the coating by using a specific perfluoropolyether compound with a weight average molecular weight of 500 to 50,000 Daltons. This molecular weight parameter optimization enables the coating to achieve both fingerprint invisibility and easy removability, resolving the contradiction between protective properties and effective fingerprint prevention.
Solution Approach 2:
The invention creates a composite coating system combining the perfluoropolyether compound with an organic solvent. This composite material provides unique properties that conventional single-material coatings cannot achieve, specifically making fingerprints invisible while maintaining easy removal capability.
2Ease of operation
If a coating provides strong adhesion and protection, then it becomes difficult to remove fingerprints, but if it provides easy fingerprint removal, then protective strength is reduced
Solution Approach 1:
The patent optimizes the molecular weight parameter of the perfluoropolyether compound (500 to 50,000 Daltons) to achieve a balance between coating strength and fingerprint removability. This parameter control allows the coating to maintain strong adhesion while enabling easy fingerprint removal without compromising protective properties.
3Ease of operation
If the coating provides soft touch feel, then user comfort is improved, but the coating may become more susceptible to contamination
Solution Approach 1:
The perfluoropolyether compound creates a composite coating structure that provides both soft touch feel and contamination resistance. The unique molecular structure of the compound allows the surface to remain soft to the touch while simultaneously making fingerprints invisible and easily removable, resolving the contradiction between comfort and contamination susceptibility.
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 solution provides a soft touch feel and anti-fingerprint properties, ensuring fingerprints are invisible and easily removable from surfaces, enhancing the performance and appearance of electronic devices like touch screens and displays.
Implementation Method 1
an organic solvent which dissolves or disperses the perfluoropolyether compound
Implementation Method 2
a perfluoropolyether compound including a first end and a second end facing each other and a perfluoropolyether moiety disposed between the first end and the second end
Implementation Method 3
making fingerprints invisible and easily removable
Data Source
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AI summary
A composition including a perfluoropolyether compound, and an organic solvent configured to dissolve or disperse the perfluoropolyether compound, wherein the perfluoropolyether compound includes a first end and a second end facing each other and a perfluoropolyether moiety disposed between the first end and the second end, wherein the first end includes an organic group having 6 or more carbon atoms, and wherein the second end includes a hydrolysable silicon-containing residual group.