Biodegradable Resin Particles With Controlled Size Distribution
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Solution Overview
Problem
Conventional biodegradable resin particles used in cosmetics lack spherical shape, small particle size, and adequate skin adhesion and soft spreadability, necessitating improvements for better cosmetic applications.
Innovation Solution
A biodegradable resin particle with a volume average particle size of 5 µm to 50 µm and a relative span factor of 1.2 or less, produced through a droplet ejection and granulation process using a liquid column resonance method, ensuring uniform particle size distribution and enhanced skin adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional biodegradable resin particles are used, then environmental impact is reduced, but skin adhesion and soft spreadability are insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling particle size (5-50 μm volume average) and particle size distribution (relative span factor ≤1.2) to transform the physical properties of biodegradable resin particles, enabling them to achieve both environmental compatibility and improved skin adhesion and soft spreadability for cosmetic applications
2Length of moving object
If resin particles are made smaller for better spreadability, then particle size decreases, but particle size uniformity becomes difficult to control
Solution Approach 1:
The patent employs mechanical vibration through ultrasonic treatment during the particle formation process to achieve uniform particle size distribution. The ultrasonic vibration energy helps control particle growth and prevents aggregation, enabling simultaneous achievement of small particle size (5-50 μm) and narrow size distribution (relative span factor ≤1.2)
3Shape
If resin particles are made spherical for better rolling properties, then circularity improves, but particle size control becomes more challenging
Solution Approach 1:
The patent simultaneously optimizes multiple parameters including particle size (5-50 μm), particle size distribution (relative span factor ≤1.2), and circularity (>0.960) through controlled precipitation and ultrasonic treatment processes, achieving spherical particles with precise size control for improved rolling properties and skin spreadability
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 resin particles exhibit excellent skin adhesion and soft use feeling, suitable for cosmetics, with improved spreadability and uniformity, addressing the limitations of existing technologies.
Implementation Method 1
produced through a droplet ejection and granulation process using a liquid column resonance method
Data Source
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AI summary
A resin particle is provided that includes a biodegradable resin. The resin particle has a volume average particle size of 5 µm or more and 50 µm or less and a relative span factor of 1.2 or less.