Decorative Sheet Surface Protective Layer Friction Control
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Solution Overview
Problem
Decorative plates laminated with conventional decorative sheets tend to slip when loaded, leading to potential collapse of stacked plates due to an excessively low coefficient of kinetic friction.
Innovation Solution
A decorative sheet and plate configuration featuring a moisture-proof substrate with a pattern layer and surface protective layers formed from thermosetting resins containing urethane bonds and silica particles, providing a kinetic friction coefficient of 0.11 to 0.30, enhancing slip resistance and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a surface protective layer containing silicone oil in an oily resin or cured ionizing radiation-curable monomer is used, then the surface becomes smooth and anti-contamination properties are improved, but the coefficient of kinetic friction becomes excessively low causing decorative plates to slip
Solution Approach 1:
The surface protective layer is formed as a composite material containing both a curable resin (for adhesion and structural integrity) and a powder component (silica, alumina, or titania particles) that provides friction enhancement. This composite structure allows simultaneous achievement of smoothness/anti-contamination and adequate friction coefficient (0.05≤μk<0.35), resolving the contradiction between anti-contamination properties and slip resistance.
2Ease of operation
If the surface protective layer is made smooth for anti-contamination, then cleaning becomes easier, but friction coefficient decreases causing stacking instability
Solution Approach 1:
The surface protective layer exhibits local quality differentiation where the resin matrix provides smoothness for easy cleaning, while embedded powder particles (silica, alumina, or titania) create localized friction-enhancing regions. This allows the surface to be easily cleanable while maintaining adequate kinetic friction coefficient (0.05≤μk<0.35) for stacking stability.
3Ease of manufacture
If conventional surface protective layers are used, then application is simple, but the lower limit of kinetic friction coefficient is excessively low causing plate collapse
Solution Approach 1:
The invention changes the friction parameter by incorporating powder components (silica, alumina, or titania) with specific particle sizes (0.1-2.0 μm) into the surface protective layer. This parameter modification increases the kinetic friction coefficient to an appropriate range (0.05≤μk<0.35) while maintaining the simple lamination application process, thus improving stacking reliability without complicating manufacturing.
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 effectively increases the kinetic friction coefficient of the decorative plate, preventing slipping and collapse, while maintaining design aesthetics and durability through visual and tactile stereoscopic effects.
Implementation Method 1
the surface protective layer contains silica particles, alumina particles, or titania particles... the kinetic friction coefficient is 0.05 or more and 0.35 or less
Data Source
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AI summary
Provided is a decorative plate and a decorative sheet that makes the decorative plate slip-resistant. A decorative sheet (20) includes a substrate (1) and a surface protective layer formed on the substrate (1). A decorative plate (10) is formed by laminating the decorative sheet (20) on a base (5). The surface protective layer includes a first surface protective layer (3) formed on the substrate (1) and a second surface protective layer (4) formed on part of the first surface protective layer (3). The first surface protective layer (3) contains a curable resin and has a surface kinetic friction coefficient of 0.11 or more and 0.30 or less. The second surface protective layer (4) contains at least one of resin beads and an inorganic compound filler. The first surface protective layer (3) is glossier than the second surface protective layer (4).