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Title:
ELECTRET MATERIAL, ELECTRET FILTER, AND METHOD FOR PRODUCING ELECTRET MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/063299
Kind Code:
A1
Abstract:
An electret material according to the present invention is formed from a resin composition containing at least 90 wt.% of a polypropylene resin, and 0.05-5 mass% of a hindered phenol compound having an amide bond. The crystallization temperature of the electret material is 125°C or less. As such, the electret material has excellent charge stability and processability.

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Inventors:
NAKAJIMA MIZUKI (JP)
KITAGAWA YOSHIYUKI (JP)
Application Number:
PCT/JP2022/037836
Publication Date:
April 20, 2023
Filing Date:
October 11, 2022
Export Citation:
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Assignee:
TOYO BOSEKI (JP)
International Classes:
C08L23/10; B01D39/16; B03C3/28; C08K5/20; D04H3/007; D04H3/16
Domestic Patent References:
WO2009001871A12008-12-31
Foreign References:
JP2011522137A2011-07-28
JP2019077770A2019-05-23
CN111499979A2020-08-07
JP2018095974A2018-06-21
JPS63280408A1988-11-17
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