Fluorine Polymer Surface Treatment Composition for Slip and Durability
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Solution Overview
Problem
Conventional surface-treating compositions with fluorine-containing silane polymers struggle to achieve high surface slip property while maintaining friction durability, especially in applications like touch panels and optical members, where repeated friction leads to a decrease in surface slip property due to the non-reactive upper layer's wear down.
Innovation Solution
A surface-treating composition comprising a combination of a reactive fluorine-containing silane polymer and a non-reactive fluorine-containing polymer, with a specific mass ratio and molecular weight range, forming a layer with high surface slip property and friction durability by using a dual-layer structure where the reactive polymer binds to the base material and the non-reactive polymer provides lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a double layered structure with a non-silane-containing perfluoropolyether upper layer is applied to increase surface slip property, then the surface slip property is improved, but the upper layer is worn down by repeated frictions resulting in decreased surface slip property
Solution Approach 1:
The patent applies a composite material structure consisting of two distinct fluorine-containing polymer layers. The lower layer uses a silane-containing fluorine-containing polymer that bonds to the base material, while the upper layer uses a non-silane-containing fluorine-containing polymer that provides superior surface slip property. This composite structure allows each layer to fulfill its specific function, resolving the contradiction between surface slip property and friction durability.
Solution Approach 2:
The surface treatment is divided into two separate functional layers: a lower layer for bonding and structural support, and an upper layer for providing surface slip property. This segmentation allows the non-silane-containing polymer to be concentrated in the upper layer where it is needed for surface performance, while the silane-containing polymer provides the durable bond to the base material, preventing wear-related degradation of surface slip property.
2Object-generated harmful factors
If a fluorine-containing silane polymer is used to provide water-repellency and oil-repellency, then the antifouling property is improved, but the surface slip property cannot be further increased while maintaining friction durability
Solution Approach 1:
The patent combines two different fluorine-containing polymers with complementary properties. The silane-containing polymer provides antifouling property through its chemical structure, while the non-silane-containing polymer provides enhanced surface slip property. By combining these materials in a layered composite structure, the patent achieves both antifouling property and high surface slip property simultaneously, overcoming the limitation of using a single polymer type.
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 composition effectively enhances both surface slip property and friction durability, maintaining performance even under repeated friction, suitable for applications requiring high tactile feeling and optical transparency.
Implementation Method 1
a fluorine-containing silane polymer which has a hydrolyzable group bonding to a Si atom in its molecular terminal... the hydrolyzable group bonding to a Si atom reacts and bonds in between the base material and the polymers
Implementation Method 2
A layer (hereinafter, referred to as a 'surface-treating layer') formed from the surface-treating composition comprising a fluorine-containing polymer is applied to various base materials... in form of a thin film
Data Source
AI summary
The present invention provides a surface-treating composition comprising a fluorine-containing polymer which is able to form a layer having both high surface slip property and high friction durability. The surface-treating composition comprises the first compound (a reactive fluorine-containing polymer which is understood as a fluorine-containing silane polymer) and the second compound (a non-reactive fluorine-containing polymer which is understood as a fluorine-containing oil), and the proportion of the first compound is 15 to 70% by mass with respect to the total mass of the first compound and the second compound.