Title:
POLYTETRAFLUOROETHYLENE POROUS FILM
Document Type and Number:
WIPO Patent Application WO/2017/090247
Kind Code:
A1
Abstract:
This polytetrafluoroethylene porous film (20) has an average pore size of 0.03-0.2 μm and a porosity of from more than 25% to 90%. The number of pores present in a region having a width of 23 μm and a thickness of 1 μm in a cross-section parallel to the direction of thickness is within the range of 40-120. The porosity may be within the range of 30-90%. The cohesive force may be within the range of 10-20 N/25 mm. The piercing strength may be within the range of 400-1,000 gf.
Inventors:
INOUE TAKEO (JP)
SHIMATANI SHUNICHI (JP)
SHIMATANI SHUNICHI (JP)
Application Number:
PCT/JP2016/004940
Publication Date:
June 01, 2017
Filing Date:
November 21, 2016
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C08J9/00; B01D69/00; B01D71/36
Domestic Patent References:
| WO2009011315A1 | 2009-01-22 |
Foreign References:
| JPH07316327A | 1995-12-05 | |||
| JPH0532810A | 1993-02-09 | |||
| JP2015127412A | 2015-07-09 |
Attorney, Agent or Firm:
KAMADA, Koichi et al. (JP)
Download PDF: