Title:
NON-WOVEN FABRIC FOR ELECTROMAGNETIC WAVE SHIELDING MATERIALS AND ELECTROMAGNETIC WAVE SHIELDING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/059582
Kind Code:
A1
Abstract:
The problem of the present invention is to provide: a non-woven fabric base material for electromagnetic wave shielding materials, which can exhibit excellent electromagnetic wave shielding properties; and an electromagnetic wave shielding material. A non-woven fabric for electromagnetic wave shielding materials, which is a wet-type non-woven fabric comprising at least two types of stretched polyester-based short fibers and a non-stretched polyester-based short fiber, wherein the stretched polyester-based short fibers are independently selected from stretched polyester-based short fibers each having a fiber diameter of 3 μm or more and less than 12 μm and have different fiber diameters from each other and the non-stretched polyester-based short fiber has a fiber diameter of 3 to 5 μm inclusive; a non-woven fabric for electromagnetic wave shielding materials, which is a wet-type non-woven fabric comprising a stretched polyester-based short fiber having a fiber diameter of less than 3 μm and a non-stretched polyester-based short fiber having a fiber diameter of 3 to 5 μm inclusive, wherein the non-woven fabric has an areal fiber weight of 7 g/m2 or less and a density of 0.5 to 0.8 g/cm3; and a non-woven fabric for electromagnetic wave shielding materials, which comprises a stretched polyester-based short fiber and a non-stretched polyester-based short fiber having a melting point of 220 to 250ºC inclusive, wherein the peel strength (in the vertical direction) of the non-woven fabric is 2.0 N/m or more.
Inventors:
SAEGUSA HIDEAKI (JP)
KONDO YASUYOSHI (JP)
TAKAHAMA NOBUKO (JP)
JIAO XINYUE (JP)
OOYAMA KEISUKE (JP)
MASUDA TAKAO (JP)
SATO TOMOHIRO (JP)
KONDO YASUYOSHI (JP)
TAKAHAMA NOBUKO (JP)
JIAO XINYUE (JP)
OOYAMA KEISUKE (JP)
MASUDA TAKAO (JP)
SATO TOMOHIRO (JP)
Application Number:
PCT/JP2019/035633
Publication Date:
March 26, 2020
Filing Date:
September 11, 2019
Export Citation:
Assignee:
MITSUBISHI PAPER MILLS LTD (JP)
International Classes:
D04H1/435; D04H1/4382; D04H1/55; D21H17/53; H05K9/00
Foreign References:
| JP2014075485A | 2014-04-24 | |||
| JP2019049079A | 2019-03-28 | |||
| JP2019049080A | 2019-03-28 |
Other References:
"Technical outline of non-woven fabrics and development of products in Teijin group", SANITARY AND MEDICAL SUBCOMMITTEE OF ALL NIPPON NONWOVENS ASSOCIATION, LECTURE ABSTRACT, 24 August 2017 (2017-08-24)
REGARDING PAPERMAKING PET FIBE, 27 May 2008 (2008-05-27)
REGARDING PAPERMAKING PET FIBE, 27 May 2008 (2008-05-27)
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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