Resin particles and their applications

Resin particles with specific circularity and density, made from polyester resin, address adhesion issues by being easily washable, improving manufacturing efficiency and maintaining transparency without organic solvents, while being environmentally friendly.

JP7895015B2Active Publication Date: 2026-07-24MATSUMOTO YUSHI SEIYAKU CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MATSUMOTO YUSHI SEIYAKU CO LTD
Filing Date
2025-07-04
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Conventional resin particles with high sphericity adhere strongly to manufacturing equipment, leading to decreased yield rates, laborious cleaning processes, and increased maintenance costs, while biodegradable particles with cavities affect transparency and require large amounts to achieve desired effects.

Method used

Resin particles with a circularity of 0.9 or less, loose bulk density of 0.1 to 0.5 g/cm³, and specific gravity of 2.0 or less, made from polyester resin, allowing easy washing and reducing adhesion, and incorporating surfactants and water-soluble polymers for improved dispersibility and transparency.

Benefits of technology

The resin particles can be easily washed away, reducing equipment adhesion and maintenance costs, maintaining transparency, and providing excellent handling properties without the need for organic solvents, thus enhancing manufacturing efficiency and environmental sustainability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The purpose of the present invention is to provide resin particles that can easily be washed away even if adhered to equipment.　These resin particles contain a polyester resin, and have an average circularity of 0.9 or less and a loose bulk density of 0.1 to 0.5 g / cm3. The concealment rate is preferably 50% or less. The linseed oil absorption amount is preferably 150 to 500 ml / 100 g. The apparent specific gravity is preferably 2.0 or less. The relative density indicated by formula (1) is preferably 0.6 g / cm3 or less. (1): Relative density (g / cm3) = loose bulk density (g / cm3) ÷ apparent specific gravity
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