公开(公告)号：US20230233966A1

公开(公告)日：2023-07-27

申请号：US18010926

申请日：2021-06-22

Applicant: Toray Industries, Inc.

Inventor： Rika Kameshima ,  Sachio Inaba ,  Shingo Hayashi

IPC: B01D39/16 ,  B03C3/28 ,  D04H3/007 ,  D04H3/16

CPC classification number: B01D39/1623 ,  B03C3/28 ,  D04H3/007 ,  D04H3/16 ,  B01D2239/0435 ,  B01D2239/0622 ,  B01D2239/1233

Abstract: The purpose of the present invention is to provide an electret fiber sheet that has high collection performance and that is suitably used in an air filter, etc. The present invention is an electret fiber sheet configured from polyolefin-based resin fibers comprising a polyolefin-based resin composition containing a high-crystalline polyolefin resin and a low-crystalline polyolefin resin, wherein the mass ratio of the low-crystalline polyolefin resin in the polyolefin-based resin composition is 0.5-10 mass % (inclusive) relative to the total mass of the high-crystalline polyolefin-based resin and the low-crystalline polyolefin resin, and a hindered-amine-based compound is included in the electret fiber sheet in an amount of 0.1-5.0 mass % (inclusive).