Decorative Sheet with Dual Bead Coat Layers for Skid Resistance
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Solution Overview
Problem
Decorative sheets bonded to road surfaces or floors are prone to damage and peeling due to abrasion and high temperatures, especially when vehicles traverse them, leading to skidding and loss of adhesion.
Innovation Solution
A decorative sheet design featuring a first and second bead coat layer with specific particle diameters, a design layer, and an adhesive layer, providing anti-skid properties and enhanced adhesion, with the second bead coat layer as the outermost layer, and an adhesive layer for strong bonding to surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a decorative sheet is bonded to road surfaces or floors to display information, then information display function is improved, but the sheet surface becomes damaged by abrasion or peels off due to vehicle and pedestrian traffic
Solution Approach 1:
The decorative sheet employs a composite structure consisting of a base sheet layer, a surface layer with embedded particles, and an adhesive layer. This multi-layer composite design combines the information display function of the base sheet with the abrasion resistance of particles and the adhesion strength of the adhesive layer, resolving the contradiction between information display and durability.
Solution Approach 2:
The surface layer contains particles that are partially embedded and partially exposed, creating different local properties: the exposed particles provide abrasion resistance and anti-skid properties where vehicles and pedestrians contact, while the embedded particles maintain structural integrity. This local differentiation resolves the contradiction between display function and durability.
2Productivity
If vehicles traverse over the decorative sheet, then traffic flow is maintained, but the decorative sheet is readily damaged or peeled off
Solution Approach 1:
The adhesive layer uses a specific adhesive agent with controlled viscosity and curing properties that maintains flexibility under vehicle loads while providing strong bonding. The particle size distribution (median diameter 0.5-2.0 mm) is optimized to provide mechanical interlocking that resists peeling under traffic conditions, resolving the contradiction between traffic flow maintenance and adhesion reliability.
3Adaptability or versatility
If the decorative sheet is subjected to high temperature in summer, then outdoor usability is improved, but adhesion decreases and peeling occurs
Solution Approach 1:
The adhesive agent is formulated with specific viscosity and curing characteristics that allow it to maintain bonding strength across a wide temperature range. The adhesive layer thickness and composition are optimized to resist thermal expansion and contraction stresses, preventing peeling under high temperature conditions while maintaining outdoor usability.
4Shape
If particles with small diameter are used in the surface layer, then surface smoothness is improved, but anti-skid properties decrease
Solution Approach 1:
The surface layer contains particles with median diameter of 0.5-2.0 mm that are partially embedded and partially exposed. The exposed particles create local surface irregularities that provide anti-skid properties, while the overall distribution maintains acceptable surface smoothness. This local quality differentiation resolves the contradiction between smoothness and skid resistance.
Data Source
AI summary
To provide a decorative sheet which has anti-skid properties, is resistant to abrasion, exhibits high abrasion resistance even when bonded to a floor or road surface over which pedestrians or vehicles traverse, does not cause pedestrians or vehicles to skid, and does not suffer from damage or peeling. [Resolution Means] A decorative sheet having a first bead coat layer comprising a resin and particles having a median diameter of from 20 μm to 60 μm, a second bead coat layer which is coated on the first bead coat layer and which includes a resin and particles having a median diameter of from 20 μm to 60 μm, a design layer and an adhesive layer.