Laminate Underlayer Protecting Fluorinated Surface Layers from UV and Wear

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Solution Overview

Problem

Existing surface-treating layers formed from fluorine-containing silane compounds lack sufficient ultraviolet resistance and friction durability.

Innovation Solution

Incorporating an underlayer of polysilazane or aminosilane between the substrate and the surface-treating layer, which is formed from a fluorine-containing silane compound, enhances the ultraviolet resistance and friction durability of the laminate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a surface-treating layer is formed from fluorine-containing silane compound, then water-repellency and oil-repellency are improved, but ultraviolet resistance deteriorates

Engineering Contradiction:

Improvewater-repellency and oil-repellencyVSAvoidultraviolet resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an underlayer composed of polysilazane or aminosilane as an intermediary between the substrate and the fluorine-containing silane surface-treating layer. This underlayer acts as a mediator that protects the fluorine-containing silane layer from ultraviolet degradation while preserving its water-repellent and oil-repellent properties. The underlayer absorbs or scatters UV radiation, preventing direct damage to the functional surface layer.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a composite laminate structure combining multiple materials with different functions: the substrate, the protective underlayer (polysilazane or aminosilane), and the functional surface-treating layer (fluorine-containing silane compound). This composite structure integrates the UV resistance of the underlayer with the water-repellency and oil-repellency of the surface layer, achieving multi-functional performance that neither material could provide alone.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a surface-treating layer is formed from fluorine-containing silane compound, then water-repellency and oil-repellency are improved, but friction durability deteriorates

Engineering Contradiction:

Improvewater-repellency and oil-repellencyVSAvoidfriction durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The underlayer serves as a protective intermediary that enhances the mechanical durability of the surface-treating layer. It provides a robust foundation that resists friction and wear, thereby extending the service life of the fluorine-containing silane layer while maintaining its water-repellent and oil-repellent functions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The laminate composite structure combines the wear-resistant properties of polysilazane or aminosilane in the underlayer with the low-friction surface properties of the fluorine-containing silane compound. This composite approach achieves both high friction durability and sustained water/oil repellency over time.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If an underlayer of polysilazane or aminosilane is added, then ultraviolet resistance and friction durability are improved, but device complexity increases

Engineering Contradiction:

Improveultraviolet resistance and friction durabilityVSAvoidlaminate structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent divides the coating system into two distinct functional segments: the underlayer for UV and friction protection, and the surface-treating layer for water and oil repellency. This segmentation allows each layer to be optimized for its specific function while simplifying the overall design by clearly separating protective functions from surface performance functions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The underlayer performs multiple functions simultaneously: it provides ultraviolet resistance, enhances friction durability, and serves as an adhesive bonding layer between the substrate and the surface-treating layer. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 laminate with the underlayer exhibits improved ultraviolet resistance and friction durability, providing a more robust and durable surface-treating layer.

Implementation Method 1

a laminate having a surface-treating layer with greater ultraviolet resistance can be provided by disposing an underlayer formed of polysilazane or aminosilane between a substrate and the surface-treating layer

Methodology Applied

Scientific EffectUltraviolet resistance: Absorption (EM radiation)

Implementation Method 2

Methodology Applied

Scientific EffectFriction durability: Friction

Data Source

PatentUS20250263331A1laminate

Publication Date: 2025.08.21 DAIKIN INDUSTRIES LTD

AI summary

A laminate comprising a substrate, an underlayer disposed on the substrate, and a surface-treating layer disposed on the underlayer, wherein the underlayer is a layer formed of (A) polysilazane represented by the following formula (P) or (B) aminosilane represented by the following formula (Q) and the surface-treating layer is a layer formed of a fluorine-containing silane compound:N(R71—SiR723)mR733-m (Q).