Fluorine Surface Layer for Optical Members Balancing Fixation and Antifouling
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Solution Overview
Problem
Optical members with antireflection films made of inorganic materials face challenges in processing stability due to high surface free energy, leading to adhesion and removal issues with dirt, and existing solutions do not adequately balance fixation stability with antifouling characteristics during processing.
Innovation Solution
A surface layer comprising components A and B, where component A has an organic segment with fluorine and component B has unsaturated hydrocarbon, carbon-oxygen, or carbon-nitrogen double bonds, with a composition ratio of 0.15 to 0.80, providing both high friction for processing stability and low friction for antifouling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an antireflection film made of inorganic materials is used, then light reflection is suppressed, but surface free energy increases causing dirt adhesion and processing instability
Solution Approach 1:
The patent applies composite materials by combining inorganic materials (for antireflection) with organic materials containing fluorine and silicon (for low surface free energy). This creates a composite coating that simultaneously achieves light reflection suppression and dirt resistance while maintaining processing stability.
Solution Approach 2:
The patent changes the surface free energy parameter by introducing fluorine-containing organic compounds into the coating composition. This reduces the surface free energy from high (causing dirt adhesion) to low (providing antifouling properties), while maintaining other functional properties through controlled composition ratios.
2Ease of operation
If a frictional force is reduced to make the surface slippery for antifouling, then dirt removal is facilitated, but the optical member becomes difficult to fix stably during processing
Solution Approach 1:
The patent applies local quality by creating a surface layer with specific fluorine-containing organic compounds that provide low friction and antifouling properties only at the surface, while the bulk material and underlying layers maintain their original friction characteristics for stable processing fixation.
Solution Approach 2:
The patent selectively changes the friction parameter at the surface level by introducing fluorine-containing compounds, reducing surface friction for easy dirt removal, while maintaining adequate friction in the bulk material for processing stability through controlled composition and layer structure.
3Object-affected harmful factors
If an oil-repellent coating film is provided, then antifouling property is improved, but edging and processing become difficult due to slipperiness
Solution Approach 1:
The patent uses composite materials combining oil-repellent compounds with resins and crosslinking agents, creating a coating that provides antifouling properties while the resin matrix and crosslinking structure maintain sufficient surface friction for edging and processing operations.
Solution Approach 2:
The patent introduces resins and crosslinking agents as intermediary substances that mediate between the oil-repellent coating and the substrate, providing a structure that enables both antifouling properties and adequate friction for processing stability.
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 achieves stable fixation during processing and effective antifouling characteristics, allowing for easy dirt removal while maintaining usability and processing ease.
Implementation Method 1
An antireflection film formed of an inorganic material has high surface free energy. Due to the high surface free energy, dirt such as fingerprints, sebum, sweat, and cosmetics often adheres to the surface
Implementation Method 2
an optical member having a surface imparted with a property that makes it difficult for dirt to adhere and facilitates the removal of dirt when such adheres (hereinafter, such performance is also referred to as 'antifouling property' or 'antifouling characteristic') has a problem that since a frictional force is small and the surface is slippery, the optical member is difficult to fix stably when processing the shape thereof
Data Source
AI summary
The present invention provides: a surface layer and the like, which achieve a good balance between antifouling characteristics and fixation stability during processing; and a material for forming a surface layer, and the present invention provides a surface layer which contains at least a component A and a component B, wherein: the component A has an organic moiety that contains fluorine; the component B contains an organic moiety that has at least one bond selected from the group consisting of an unsaturated hydrocarbon bond, a carbon-oxygen double bond and a carbon-nitrogen double bond; and the constitutional ratio of the component B to the component A in the surface layer is from 0.15 to 0.80. The present invention also provides a material for forming a surface layer.