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Title:
POROUS FILM LAMINATE, FILTER ELEMENT, AND PRODUCTION METHOD FOR POROUS FILM LAMINATE
Document Type and Number:
WIPO Patent Application WO/2021/235118
Kind Code:
A1
Abstract:
A porous film laminate according to the present disclosure comprises: a porous supporting layer; and a porous film which is stacked on one surface of the supporting layer and is composed primarily of polytetrafluoroethylene. The porous film is made of a uniaxially drawn material, the porous film has an average pore diameter of 25-35 nm and a maximum pore diameter of 49 nm or less, and the porous film has an average thickness of 0.6-3.5 μm.

Inventors:
AKAMA MITSUHIRO (JP)
Application Number:
PCT/JP2021/014445
Publication Date:
November 25, 2021
Filing Date:
April 05, 2021
Export Citation:
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Assignee:
SUMITOMO ELECTRIC FINE POLYMER INC (JP)
International Classes:
B01D69/10; B01D69/12; B01D71/36; B32B5/32; B32B27/30
Domestic Patent References:
WO2013084858A12013-06-13
Foreign References:
JP2013237808A2013-11-28
JP2013154264A2013-08-15
JP2015009219A2015-01-19
Attorney, Agent or Firm:
MORITA Takeshi et al. (JP)
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