Biodegradable Resin Particles for Skin Adhesion and Soft Spreadability
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Solution Overview
Problem
Existing resin particles used in cosmetics and coatings lack biodegradability and do not provide adequate skin adhesion and soft spreadability, which are essential for cosmetic applications.
Innovation Solution
Development of biodegradable resin particles 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 to ensure uniform particle size and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resin particles are used, then production is simple and cost-effective, but they lack biodegradability and do not provide adequate skin adhesion and soft spreadability
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 achieve optimal skin adhesion and soft spreadability. This quantitative parameter optimization resolves the contradiction by transforming the manufacturing process into a controlled, reproducible method that delivers superior cosmetic performance while remaining practically implementable
Solution Approach 2:
The patent uses composite materials by combining biodegradable resin with specific particle size distributions and surface characteristics to create particles that simultaneously achieve biodegradability, skin adhesion, and soft spreadability. This composite approach resolves the contradiction by integrating multiple functional properties into a single material system that meets cosmetic requirements
2Manufacturing precision
If resin particles with wide particle size distribution are used, then production is easier, but soft spreadability on skin deteriorates
Solution Approach 1:
The patent employs mechanical vibration through ultrasonic treatment during the granulation process to achieve narrow particle size distribution (relative span factor ≤1.2). The ultrasonic vibration energy helps control particle formation and size uniformity, resolving the contradiction by providing a effective method to achieve precise particle size control without excessively complicating the production process
Solution Approach 2:
The patent replaces traditional mechanical classification methods with a granulation process that inherently produces uniform particles through controlled droplet formation and solvent evaporation. This substitution resolves the contradiction by achieving particle size uniformity through a chemical-physical process rather than post-production mechanical sorting, thereby maintaining manufacturing simplicity while achieving high precision
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 biodegradable resin particles exhibit excellent skin adhesion and soft spreadability, suitable for cosmetic applications, while maintaining a narrow particle size distribution and high retention of biologically active substances.
Implementation Method 1
a droplet ejection and granulation process using a liquid column resonance method to ensure uniform particle size and shape
Data Source
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.