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Patent Searching and Data


Title:
ELECTRETIZED SHEET AND FILTER
Document Type and Number:
WIPO Patent Application WO/2019/189349
Kind Code:
A1
Abstract:
Provided is an electretized sheet and filter having excellent water resistance, wherein delamination between sheets and the deterioration in chargeability after washing do not easily occur. This electretized sheet has: a core layer (A) which is a porous film containing at least a thermoplastic resin; a surface layer (X) disposed on one surface of the core layer (A); and a backing layer (Y) disposed on the other surface, wherein the outermost surfaces of the surface layer (X) and the backing layer (Y) are charged. The water vapor permeability coefficient of the electretized sheet is 0.1-2.5 g·mm/m2·24 hr, the aspect ratio of pores present in the core layer (A) is 5-50, the average height of the pores is 2.5-15 µm, the thickness of each of the surface layer (X) and the backing layer (Y) is 5-200 µm, the surface layer (X) includes a heat seal layer (B) including the outermost surface, and the heat seal layer (B) has a melting point of 50-140°C.

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JPS60228829AIR FILTER DEVICE
Inventors:
SUGAMATA Yutaro (23 Towada Kamisu-sh, Ibaraki 02, 〒3140102, JP)
KOIKE Hiroshi (23 Towada Kamisu-sh, Ibaraki 02, 〒3140102, JP)
IIDA Seiichiro (4-3 Kanda-Surugadai, Chiyoda-ku Tokyo, 62, 〒1010062, JP)
Application Number:
JP2019/013164
Publication Date:
October 03, 2019
Filing Date:
March 27, 2019
Export Citation:
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Assignee:
YUPO CORPORATION (4-3 Kanda-Surugadai, Chiyoda-ku Tokyo, 62, 〒1010062, JP)
International Classes:
B03C3/28; B01D39/14; B01D39/16; B03C3/47; B32B5/18; B32B27/00
Foreign References:
JP2010089494A2010-04-22
JP2002102625A2002-04-09
JP2010089495A2010-04-22
JP2015098022A2015-05-28
JP2000218112A2000-08-08
Attorney, Agent or Firm:
TAKAOKA Ryoichi et al. (Takaoka IP Law Office, Ikebukuro Tosei Building 5th Floor, 5-4-7, Nishi-Ikebukuro, Toshima-k, Tokyo 21, 〒1710021, JP)
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