Decorative Coating Layers That Preserve Gloss Unevenness at Oblique Angles
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Solution Overview
Problem
Decorative materials that use a gloss-adjusting layer to create a three-dimensional unevenness effect struggle to maintain the feeling of unevenness when observed from different angles, leading to a reduced high-grade appearance in applications like building finishes and furniture.
Innovation Solution
A decorative material design featuring a first gloss-adjusting layer with a matting agent having a particle diameter of 1.0 times or more the layer thickness, and a second gloss-adjusting layer with a different gloss, where the matting agent is added to either layer, ensuring the particle diameter is sufficient to prevent gloss increase when viewed obliquely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a gloss-adjusting layer with fine particles is used to create three-dimensional unevenness effect, then the feeling of unevenness is enhanced, but the feeling of unevenness deteriorates when observed from different angles
Solution Approach 1:
The patent changes the particle size parameter of the matting agent to be equal to or larger than the layer thickness, which fundamentally alters how light interacts with the gloss-adjusting layer. This parameter change ensures that the unevenness effect remains consistent across different viewing angles while maintaining the desired aesthetic appearance.
Solution Approach 2:
The patent transitions from using fine particles (two-dimensional surface texture) to using particles with diameter ≥ layer thickness (three-dimensional protruding structures). This dimensional change creates genuine physical unevenness that maintains its visual effect from multiple angles, rather than relying solely on optical illusions from fine particle scattering.
2Manufacturing precision
If mechanical embossing is used to faithfully reproduce unevenness, then the high-grade feeling is improved, but the production complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical embossing system with a chemical/coating-based system. Instead of using mechanical pressure and complex embossing tools to create physical unevenness, the invention uses a gloss-adjusting layer with specifically sized matting agents that create the desired unevenness effect through material deposition, significantly simplifying the production process.
Solution Approach 2:
The patent changes the approach from mechanical deformation to controlled material deposition by adjusting the particle size parameter of the matting agent. This allows the unevenness effect to be achieved through coating process parameters rather than mechanical processing parameters, reducing device complexity.
3Productivity
If two types of coating materials with different glosses are used, then the production efficiency is improved, but the feeling of continuous unevenness deteriorates
Solution Approach 1:
The patent applies local quality by using the gloss-adjusting layer with matting agents of specific size (diameter ≥ layer thickness) only in regions where unevenness expression is desired, while maintaining different gloss levels in different areas through selective application. This allows continuous unevenness effects to be achieved while preserving the efficiency benefits of using different coating materials in different regions.
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 maintains a consistent feeling of unevenness due to gloss difference across various angles, enhancing the high-grade appearance and design expression, while also providing improved abrasion resistance and scratch resistance.
Implementation Method 1
the matting agent imparts unevenness to the surface of the gloss-adjusting layer, and light is scattered on the uneven surface, thereby obtaining a matting effect
Data Source
AI summary
In a decorative material, a matting agent is added to, of a first gloss-adjusting layer and a second gloss-adjusting layer, one with lower gloss, where the matting agent has a particle diameter of 1.0 times or more the thickness of the gloss-adjusting layer with lower gloss. Accordingly, sufficient unevenness can be imparted to the surface of the gloss-adjusting layer; thus, glossiness does not increase in oblique observation, and low gloss can be maintained. Therefore, it is possible to provide a decorative material having a feeling of unevenness obtained by the difference in gloss that hardly changes even when observed obliquely.