Decorative Part Clear-Coat Gloss Control for 3D Surface Texture
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Solution Overview
Problem
Conventional decorative parts with clear-coat layers lack the ability to create visually appealing, three-dimensional designs as the clear-coat formation compromises the concave-convex texture, and without a protective layer, the convex parts wear off due to friction, leading to a monotonous gloss and deteriorated design quality.
Innovation Solution
A method involving a decorative-part with a clear-coat layer that combines high-gloss and low-gloss regions by forming a concave-convex part beneath the low-gloss region, using an ester-based clear-coat paint with a low-boiling-point solvent and 10-55% solid content, sprayed via an atomization-coating machine to create a clear-coat layer with a roughness of 1 μm or less, enhancing the three-dimensional appearance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clear-coat layer is formed to protect the decorative-layer, then durability against friction is improved, but the three-dimensional look of concave-convex parts deteriorates due to gloss uniformity
Solution Approach 1:
The clear-coat layer is designed with spatially varying properties: high-gloss regions over flat decorative areas and low-gloss regions over convex portions. This local differentiation allows the protective layer to maintain durability while preserving the three-dimensional appearance through selective gloss reduction on raised surfaces.
Solution Approach 2:
The gloss parameter of the clear-coat layer is changed across different regions. By controlling the gloss level to be high in some areas and low in others, the invention maintains protection while creating visual depth. The low-gloss regions on convex parts reduce light reflection to emphasize three-dimensional texture.
2Shape
If no protective-surface layer is formed, then the three-dimensional look is maintained, but the convex parts become worn by friction after long use
Solution Approach 1:
The clear-coat layer is designed with spatially varying properties: high-gloss regions over flat decorative areas and low-gloss regions over convex portions. This local differentiation allows the protective layer to maintain durability while preserving the three-dimensional appearance through selective gloss reduction on raised surfaces.
Solution Approach 2:
The gloss parameter of the clear-coat layer is changed across different regions. By controlling the gloss level to be high in some areas and low in others, the invention maintains protection while creating visual depth. The low-gloss regions on convex parts reduce light reflection to emphasize three-dimensional texture.
3Reliability
If a clear-coat layer with uniform gloss is formed, then protection is provided, but the design quality deteriorates due to monotonous gloss appearance
Solution Approach 1:
The clear-coat layer is designed with spatially varying properties: high-gloss regions over flat decorative areas and low-gloss regions over convex portions. This local differentiation allows the protective layer to maintain durability while preserving the three-dimensional appearance through selective gloss reduction on raised surfaces.
Solution Approach 2:
The gloss parameter of the clear-coat layer is changed across different regions. By controlling the gloss level to be high in some areas and low in others, the invention maintains protection while creating visual depth. The low-gloss regions on convex parts reduce light reflection to emphasize three-dimensional texture.
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
This approach allows for a visually striking three-dimensional design with a significant difference in gloss levels between high-gloss and low-gloss regions, maintaining the design quality even after long use by preventing surface abrasion and ensuring the clear-coat layer protects the decorative layer effectively.
Implementation Method 1
clear-coat paint containing a low-boiling-point solvent (less than 100 degrees) as the main solvent
Implementation Method 2
clear-coat paint is sprayed onto the surface of the decorative-layer by an atomization-coating machine
Data Source
AI summary
The automobile decorative-part (1) comprises a resin-compact (3) having a decorative-layer (2) on its surface-layer and comprises a clear-coat layer (4) for protecting said surface-layer, and that a high-gloss region (R1) of a relatively high-gloss level is mixed with a low-gloss region (R2) of a relatively low-gloss level on the surface of said decorative-part, and that a clear-coat paint is sprayed by an atomization-coating machine onto the surface of the decorative-layer (2), and that the atomization-coating machine contains an ester-based solvent of a low-boiling point as the main-solvent that has a boiling-point of 100 degrees Celsius or less and has a solid-content of 35 to 40 percent by mass, thus forming the clear-coat layer (4) that makes it partially possible to mat the gloss of the surface of the clear-coat layer, thus manufacturing a decorative-part with an excellent quality design.