Thermosetting Powder Coating Core-Shell Structure
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Solution Overview
Problem
Conventional powder coating materials face challenges in achieving smoothness and storage stability when particle size is reduced, leading to increased particle size distribution, coarse and fine powder generation, and irregular shapes, which result in low smoothness and aggregation issues.
Innovation Solution
A thermosetting powder coating material with a core containing a thermosetting resin and agent, and a resin coating portion, characterized by a volume particle size distribution index GSDv ≤ 1.50 and average circularity ≥ 0.96, which maintains smoothness and storage properties even with reduced particle diameter, using a core/shell structure to prevent bleeding and aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If particle size is reduced to decrease material usage, then coating efficiency and smoothness improve, but particle size distribution increases and aggregation occurs
Solution Approach 1:
The patent applies parameter changes by precisely controlling the volume particle size distribution index (GSDv) to ≤1.50 and average circularity to ≥0.96. These parameter specifications ensure uniform particle size distribution while maintaining reduced particle diameter, preventing aggregation and maintaining storage stability despite decreased material usage.
2Manufacturing precision
If particle size is reduced to improve coating smoothness, then material usage decreases, but irregular particle shapes increase causing aggregation
Solution Approach 1:
The patent controls the average circularity parameter to ≥0.96, ensuring particles maintain regular spherical shapes even at reduced sizes. This shape control prevents aggregation during storage and application, while the reduced particle diameter achieves the desired coating smoothness and reduced material usage.
Solution Approach 2:
The patent employs spherical particle morphology with high circularity (≥0.96) to improve flow characteristics and prevent aggregation. The spherical shape ensures uniform coating distribution and smooth finish, while the controlled size reduction decreases material usage without compromising coating quality.
3Productivity
If particle size is reduced to decrease material usage, then coating efficiency improves, but storage stability deteriorates due to aggregation
Solution Approach 1:
The patent simultaneously controls multiple parameters: volume particle size distribution index (GSDv) ≤1.50, average circularity ≥0.96, and particle diameter. This multi-parameter control ensures uniform particle distribution that maintains storage stability while the reduced particle size achieves high coating efficiency and productivity.
Data Source
AI summary
A thermosetting powder coating material includes powder particles that contain a core containing a thermosetting resin and a thermosetting agent, and a resin coating portion for coating a surface of the core, and of which a volume particle size distribution index GSDv is equal to or smaller than 1.50 and an average circularity is equal to or greater than 0.96.