Title:
ELECTRET FIBER SHEET, LAMINATED SHEET, AIR FILTER, AND METHOD FOR MANUFACTURING ELECTRET FIBER SHEET
Document Type and Number:
WIPO Patent Application WO/2023/276484
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an electret fiber sheet which has high collection performance and high thermal stability and is suitably used for an air filter or the like. The present invention is an electret fiber sheet which is composed of a polyolefin-based resin fiber formed of a polyolefin-based resin composition containing a crystal nucleating agent, the electret fiber sheet being characterized in that: the mass ratio of the crystal nucleating agent in the polyolefin-based resin composition is 0.005-5 mass% with respect to the total mass of the polyolefin-based resin composition; the temperature-falling crystallization temperature in cycle DSC is 110-130ºC; and the fusion heat quantity ∆Hm during a second temperature rise is 110-130 J/g.
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Inventors:
HAYASHI SHINGO (JP)
INABA SACHIO (JP)
ITO MASASHI (JP)
INABA SACHIO (JP)
ITO MASASHI (JP)
Application Number:
PCT/JP2022/020937
Publication Date:
January 05, 2023
Filing Date:
May 20, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D39/16; B03C3/28; D04H3/007; D04H3/16
Domestic Patent References:
| WO2019159654A1 | 2019-08-22 | |||
| WO2020022260A1 | 2020-01-30 | |||
| WO2021153296A1 | 2021-08-05 |
Foreign References:
| JP2019093367A | 2019-06-20 | |||
| JP2009062667A | 2009-03-26 | |||
| JP2014176775A | 2014-09-25 | |||
| JP2021137723A | 2021-09-16 | |||
| JP2021115521A | 2021-08-10 |
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