Title:
極細繊維シート
Document Type and Number:
Japanese Patent JP6888242
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fiber sheet small in reduction in a collection efficiency, and having both high collection efficiency and low pressure loss even after losing electrostatic force as an electret filter material.SOLUTION: The fiber sheet is composed of at least not less than two kinds of short fibers one of which is an ultrafine fiber 1 having a fiber diameter of less than 1.0 μm, and has an average pore size of 10.0-50.0 μm, a distribution frequency of pore size not less than 15.0 μm of 10.0%, and a minimum pore size of not greater than 2.0 μm. The fiber sheet are preferably subjected to electret processing where one of composed fibers is a core-sheath conjugate fiber arranged with a polymer having a melting point not less than 150°C as a sheath, and the fiber having a fiber diameter of 1.0-5.0 μm is blended by 10-70 weight% to a weight of the whole sheet.SELECTED DRAWING: Figure 1
Inventors:
Hirofumi Yamanaka
Masato Masuda
Yasuhiro Asada
Masato Masuda
Yasuhiro Asada
Application Number:
JP2016052073A
Publication Date:
June 16, 2021
Filing Date:
March 16, 2016
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
D21H15/02; D01F1/10; D01F8/14; D21H13/14
Domestic Patent References:
| JP2008130019A1 | ||||
| JP2014233687A | ||||
| JP2013177703A | ||||
| JP5031310A | ||||
| JP2003129393A | ||||
| JP2012045021A | ||||
| JP2004089853A |