Decorative Sheet with Finely Divided Silver Antiviral Coating
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Solution Overview
Problem
Conventional interior finishing decorative sheets have poor antiviral properties due to the limited effectiveness of silver-based or zinc-based inorganic additives.
Innovation Solution
A decorative sheet comprising a paper substrate, a printed pattern layer, and a surface protective layer with a coating containing finely divided silver as an antiviral additive, along with a silicone-based or fluorine-based component for contamination resistance, and a specific particle size distribution for enhanced antiviral performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional silver-based or zinc-based inorganic additives are used in the resin coating, then the decorative sheet has basic antiviral properties, but the antiviral effectiveness is poor
Solution Approach 1:
The patent changes the particle size parameter of the silver additive from conventional large particles to finely divided particles with average diameter of 1 μm or less. This parameter change significantly improves antiviral effectiveness while maintaining the basic coating structure
Solution Approach 2:
The patent creates a composite coating system combining resin base material with finely divided silver particles, where the silver is dispersed throughout the resin matrix. This composite structure allows the resin to provide structural integrity while the fine silver particles provide enhanced antiviral activity
2Reliability
If the amount of antiviral additive particles in the coating layer is increased, then antiviral properties are improved, but the mechanical strength and designability may be compromised
Solution Approach 1:
The patent optimizes the particle size parameter of silver to 1 μm or less, which allows achieving high antiviral effectiveness at lower concentrations. The fine particles have larger surface area-to-volume ratio, providing better antiviral activity per unit mass, thus reducing the need for high loading amounts that would compromise mechanical strength
Solution Approach 2:
The patent uses a moderate amount of fine silver particles (0.2-12 mass %) rather than excessive amounts. The finely divided nature of the particles provides sufficient antiviral activity at these partial concentrations, avoiding the need for high loadings that would weaken the coating structure
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 decorative sheet achieves improved antiviral properties by effectively killing viruses on its surface, with the finely divided silver and optimized particle size distribution contributing to a strong antiviral effect while maintaining mechanical strength and designability.
Implementation Method 1
the coating layer being comprised of a coating containing antiviral additive particles having a predetermined average particle diameter, the antiviral additive particles comprising finely divided silver
Implementation Method 2
the coating layer contains a silicone-based component or a fluorine-based component, the silicone-based component or the fluorine-based component imparting contamination resistance to the coating layer
Data Source
AI summary
A decorative sheet is provided that includes a paper substrate, a printed pattern layer arranged to face a major surface of the paper substrate, and a single-layer or multilayered surface protective layer arranged to face the pattern layer, the surface protective layer comprising a coating layer as an outermost layer of the decorative sheet, the coating layer being comprised of a coating containing antiviral additive particles (e.g., antiviral agent), the antiviral additive particles comprising finely divided silver. Further, the coating layer may contain a silicone-based component or a fluorine-based component, which imparts contamination resistance to the coating layer; the amount of the antiviral additive particles in the coating layer may be 0.2 mass % or more and 12 mass % or less relative to the total solid content of the coating layer; and the thickness of the coating layer may be 3 μm or more.