Optical Member Surface Layer Stain Repellency and Machinability
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Solution Overview
Problem
Existing optical members, such as spectacle lenses, face challenges in achieving a balance between secure machinability and effective stain repellency, as surfaces with high stain-repellent properties tend to be slippery and difficult to hold during machining.
Innovation Solution
A surface layer comprising a combination of component A, which has a siloxane segment with siloxane bonds, and component B, an alkyl compound with organic segments containing specific bonds, is used. This combination adjusts the frictional force based on the load applied, allowing secure holding during machining while maintaining stain-repellent properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the surface of an optical member is provided with stain-repellent properties, then stain adhesion is reduced and stain removal is facilitated, but the surface becomes slippery making machining difficult
Solution Approach 1:
The patent applies parameter changes by controlling the compositional ratio of component B to component A within the range of 0.01 to 3.00. This ratio control adjusts the surface properties to achieve both stain repellency and adequate friction for machining. The specific compositional parameters of the siloxane segment and alkyl compound are optimized to balance these conflicting requirements.
Solution Approach 2:
The patent uses a composite material approach by combining component A (siloxane segment) and component B (alkyl compound with specific bonds) in a defined ratio. This composite surface layer integrates the stain-repellent properties of siloxane with the friction-enhancing characteristics of the alkyl compound, resolving the contradiction between stain repellency and machinability.
2Ease of manufacture
If the surface exhibits high frictional force for secure holding during machining, then machinability is improved, but stain-repellent properties are reduced
Solution Approach 1:
The patent resolves this contradiction through precise parameter control of the compositional ratio between component B and component A. By maintaining this ratio within 0.01 to 3.00, the surface achieves a balanced friction coefficient that provides adequate holding during machining while preserving stain-repellent properties. The specific chemical composition parameters are optimized to achieve this dual functionality.
Solution Approach 2:
The composite surface layer combining siloxane segment (component A) and alkyl compound (component B) creates a material with dual characteristics. The siloxane provides stain repellency while the alkyl compound contributes to friction, and their synergistic combination in the specified ratio achieves both machinability and stain resistance 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 surface layer achieves both secure machinability and effective stain repellency by maintaining a higher frictional force under high loads and low friction under typical user loads, thus enabling easy cleaning and comfortable use.
Implementation Method 1
Anti-reflection films made of inorganic materials exhibit high surface free energies. Due to such high surface free energy, stains such as those caused by fingerprints, sebum, sweat, or cosmetics originating from the user often adhere on the anti-reflection film
Implementation Method 2
such a surface exhibits reduced frictional force, making the surface slippery. This causes problems in machining the optical member into the desired shape because the optical member is difficult to hold securely during machining
Data Source
AI summary
A surface layer comprising at least a component A and a component B, wherein the component A has a siloxane segment containing a siloxane bond, the component B is an alkyl compound having an organic segment having at least one bond selected from the group consisting of a saturated hydrocarbon bond, an unsaturated hydrocarbon bond, a carbon-oxygen double bond, and a carbon-nitrogen double bond, and having a structure represented by a specific general formula, and compositional ratio of the component B to the component A in the surface layer is from 0.04 to 3.00.