ELECTRETIZED SHEET AND FILTER

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.

More Like This:

JPS60228829

AIR FILTER DEVICE

Inventors:

SUGAMATA YUTARO (JP)
KOIKE HIROSHI (JP)
IIDA SEIICHIRO (JP)

Application Number:

PCT/JP2019/013164

Publication Date:

October 03, 2019

Filing Date:

March 27, 2019

Export Citation:

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Assignee:

YUPO CORP (JP)

International Classes:

B03C3/28; B01D39/14; B01D39/16; B03C3/47; B32B5/18; B32B27/00

Foreign References:

JP2010089494A	2010-04-22
JP2002102625A	2002-04-09
JP2010089495A	2010-04-22
JP2015098022A	2015-05-28
JP2000218112A	2000-08-08
JP2015098022A	2015-05-28
JP2008018350A	2008-01-31
JP2010023502A	2010-02-04
JP2018068731A	2018-05-10
JP2018143512A	2018-09-20

Other References: