Title:
POLYTETRAFLUOROETHYLENE ORIENTED POROUS FILM, AND AIR-PERMEABLE FILTRATION MEDIUM AND FILTER MEMBER USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/112197
Kind Code:
A1
Abstract:
In a polytetrafluoroethylene oriented porous film provided by the present invention, the through-thickness air permeability, expressed as Frazier air permeability, is 4 cm3/(sec·cm2) or greater, and the total cohesive strength, as expressed by the product of the cohesive peel strength in an in-plane first direction and the cohesive peel strength in a second direction orthogonal in-plane to the first direction, is 1.9 (N/20 mm)2 or greater. The oriented porous film is highly air permeable, and yet, when incorporated into a filter member, for example, resists damage during handling or placement of said member in a housing or the like.
Inventors:
TAKAMURA YUICHI (JP)
KIGAMI HIROKI (JP)
KUROGI EISUKE (JP)
UEDA KODAI (JP)
KIGAMI HIROKI (JP)
KUROGI EISUKE (JP)
UEDA KODAI (JP)
Application Number:
PCT/JP2020/045118
Publication Date:
June 10, 2021
Filing Date:
December 03, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B01D39/16; B01D71/36; C08J9/00; C08J9/28
Domestic Patent References:
| WO2018221688A1 | 2018-12-06 |
Foreign References:
| JPH1180397A | 1999-03-26 | |||
| JP2009297702A | 2009-12-24 | |||
| JPH11515036A | 1999-12-21 |
Attorney, Agent or Firm:
KAMADA Koichi (JP)
Download PDF: