PVC Decorative Sheet Coating to Prevent Silver Chloride Discoloration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Silver-based inorganic antimicrobial and antiviral agents used in combination with chlorine-containing materials, particularly in decorative sheets made of polyvinyl chloride, suffer from pronounced discoloration due to the formation of white silver chloride.
Innovation Solution
A decorative sheet comprising a polyvinyl chloride resin layer, a pattern layer, and a surface protective layer with silver components, where the surface protective layer is free from chlorine-containing components and has a cross-linked structure formed by ultraviolet light or electron beam, with at least one layer containing silver-based additive particles, and at least one layer adjacent to the polyvinyl chloride resin layer being free from silver components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silver-based inorganic antimicrobial agents are used in combination with chlorine-containing materials, then antimicrobial and antiviral properties are achieved, but pronounced discoloration occurs due to formation of white silver chloride
Solution Approach 1:
The surface protective layer is divided into multiple layers: a first surface protective layer containing silver-based additive particles, and a second surface protective layer free from silver components. This segmentation isolates the silver-containing layer from direct contact with chlorine in the polyvinyl chloride resin layer, preventing discoloration while maintaining antimicrobial properties in the outer layer.
Solution Approach 2:
The second surface protective layer acts as an intermediary barrier between the silver-based additive particles in the first layer and the chlorine-containing polyvinyl chloride resin layer. This intermediate layer prevents direct contact between silver and chlorine, eliminating the formation of white silver chloride and subsequent discoloration.
2Reliability
If silver-based additive particles are incorporated into the surface protective layer, then antimicrobial and antiviral activity is achieved, but silver migration occurs causing discoloration
Solution Approach 1:
The surface protective layer is segmented into two distinct layers: the first layer contains silver-based additive particles for antimicrobial activity, while the second layer is free from silver components. This segmentation prevents silver migration to the interface with the polyvinyl chloride resin layer, eliminating discoloration while preserving antimicrobial functionality in the outer layer.
Solution Approach 2:
The silver-based additive particles are extracted from the bulk surface protective layer and concentrated specifically in the first surface protective layer, which is positioned away from the polyvinyl chloride resin layer. This extraction prevents silver migration into the chlorine-containing resin, eliminating discoloration while maintaining antimicrobial properties where needed.
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
Prevents discoloration by preventing contact between chlorine and silver, maintains antimicrobial and antiviral properties, and suppresses silver migration, achieving high antiviral activity with a reduction of viruses by 99.9%.
Implementation Method 1
the cross-linked structure of the surface protective layer is formed by use of ultraviolet light
Implementation Method 2
the cross-linked structure of the surface protective layer is formed by use of an electron beam
Implementation Method 3
each of the inorganic substances has one or more of the silver components supported thereon
Data Source
AI summary
Decorative sheets used for decorative materials, such as for general fittings, and methods for producing, and prevents discoloration due to contact between chlorine and silver, including at least a polyvinyl chloride resin layer, a pattern layer, and a surface protective layer, the surface protective layer contains silver components including silver and is free from chlorine-containing components. The surface protective layer may be composed of a plurality of laminated layers that include at least one layer containing the silver components; the laminated layers of the surface protective layer may include at least one layer disposed adjacent to the polyvinyl chloride resin layer and being free from silver components; the silver components may each be supported on an inorganic substance; the surface protective layer may have a cross-linked structure; and the cross-linked structure of the surface protective layer may be formed by use of ultraviolet light or an electron beam.