公开(公告)号：US20230320972A1

公开(公告)日：2023-10-12

申请号：US18199345

申请日：2023-05-18

Applicant: TOPPAN INC.

Inventor： Yasushi YABUHARA ,  Takuya ISOGAI

IPC: A61K8/73 ,  A61Q19/00 ,  A61Q1/12 ,  A61K8/02 ,  A61K8/85 ,  A61Q1/02

CPC classification number: A61K8/731 ,  A61K8/022 ,  A61K8/85 ,  A61Q1/02 ,  A61Q1/12 ,  A61Q19/00 ,  A61K2800/5424 ,  A61K2800/624 ,  A61K2800/654 ,  A61K2800/805

Abstract: Composite particles that are biodegradable and easy to handle while maintaining the characteristics of cellulose nanofibers, a method of producing composite particles, a dry powder containing the composite particles, and a skin application composition and a method of producing the skin application composition. A composite particle contains at least one type of particle and fine cellulose with which at least part of a surface of the particle is coated, wherein the particle and the fine cellulose are inseparable.