Road Surface Decorative Sheet Urethane Coating Strength
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Solution Overview
Problem
Decorative sheets for road surfaces are prone to damage from vehicle tires and reduced visibility due to indentations and distortions, especially under heavy vehicle weights and stationary steering operations, necessitating enhanced surface strength and resistance.
Innovation Solution
A decorative sheet with a graphic construct comprising an adhesive layer, a design layer, and a surface coating layer containing urethane resin, which provides mechanical strength and torsional resistance, along with an anti-skid member and retroreflective elements for improved visibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a decorative sheet is applied on a road surface without sufficient surface strength, then the decorative sheet can be easily installed, but the decorative sheet may be damaged by vehicle tires and form indentations or distortions
Solution Approach 1:
The patent employs a multi-layer composite structure consisting of a base layer, a graphic construct layer, and a surface coating layer. This composite construction combines different materials to achieve both ease of installation and high resistance to vehicle damage. The surface coating layer specifically provides enhanced surface strength while the adhesive layer ensures proper bonding to the road surface.
Solution Approach 2:
The patent utilizes UV irradiation to change the physical and chemical parameters of the coating film. The coating film is applied in an uncured state for easy installation, then transformed into a high-strength protective layer through UV curing. This parameter change enables the material to transition from a flexible, easily applied state to a rigid, damage-resistant state.
2Reliability
If a decorative sheet is applied on a road surface without sufficient stationary steering resistance, then the decorative sheet can be easily installed, but visibility of characters, figures, or the like may decrease due to distortions
Solution Approach 1:
The multi-layer composite structure provides both mechanical resistance to stationary steering and optical properties for visibility. The surface coating layer resists deformation under stationary steering loads, while the design layer maintains character and figure visibility. The adhesive layer ensures the entire construct moves as a unified structure, preventing internal distortions that would compromise visibility.
3Illumination intensity
If a coating film of ultraviolet light curing paint is formed on a seal, then visibility of characters, figures, or the like can be maintained for a long period of time, but the decorative sheet lacks sufficient surface strength against heavy vehicle weights
Solution Approach 1:
The patent combines UV-curing coating material with additional structural layers to achieve both long-term visibility maintenance and high surface strength. The surface coating layer is specifically designed to provide mechanical strength against heavy vehicle weights, while the UV-curing mechanism ensures long-term visibility maintenance through durable color and pattern retention.
Solution Approach 2:
The patent utilizes UV irradiation to transform the coating film from an uncured, low-strength state during installation to a cured, high-strength state for long-term service. This parameter change through photopolymerization enables the coating to simultaneously achieve ease of installation and long-term durability with maintained visibility.
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 enhances the decorative sheet's surface strength against heavy vehicle weights and stationary steering resistance, while maintaining visibility and durability, allowing for easy installation and effective road followability.
Implementation Method 1
a surface coating layer covering the graphic construct and containing a urethane resin
Implementation Method 2
provides mechanical strength and torsional resistance
Implementation Method 3
a graphic construct including an adhesive layer
Data Source
AI summary
Object: To provide a decorative sheet for a road surface having enhanced surface strength with respect to a large vehicle weight of a vehicle and having enhanced stationary steering resistance against a steering operation performed while a vehicle is stopped. Solution: A decorative sheet for a road surface according to an embodiment of the present invention includes: a graphic construct including an adhesive layer, and a design layer provided on the adhesive layer; and a surface coating layer covering the graphic construct and containing a urethane resin.