AIR FILTER MATERIAL - UNITIKA LTD

Title:

AIR FILTER MATERIAL

Document Type and Number:

WIPO Patent Application WO/2015/151168

Kind Code:

A1

Abstract:

[Problem] To provide an air filter material in which spunbond nonwoven fabric and meltblown nonwoven fabric are laminated and integrated without reducing air permeability. [Solution] A spunbond nonwoven fabric has, as constituent fibers, compound polyester long fibers having a cross-sectional shape that has a substantially "Y4"-like shape. Each substantially V-shaped part (6) of the substantially Y4-like shape is formed of low melting point polyester, and the other substantially plus-sign-shaped part (5) is formed of high melting point polyester. The long fibers are bonded to each other by fusion of the low melting point polyester. The spunbond nonwoven fabric and meltblown nonwoven fabric are bonded by powder-like or spider-web-like hot melt adhesive.

Inventors:

KIHARA YUKIHIRO (JP)

Application Number:

PCT/JP2014/059486

Publication Date:

October 08, 2015

Filing Date:

March 31, 2014

Export Citation:

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Assignee:

UNITIKA LTD (JP)

International Classes:

B01D39/16; B01D46/52; D04H3/011; D04H3/018; D06M17/04

Foreign References:

JP2013076182A	2013-04-25
JP2002001020A	2002-01-08
US5707735A	1998-01-13
JP2000507657A	2000-06-20
JPH10259522A	1998-09-29
JPH06511292A	1994-12-15
JP2011017115A	2011-01-27
JPS54151617A	1979-11-29
JP2008266812A	2008-11-06
JPH01201512A	1989-08-14

Other References: