Title:
MICROPOROUS FILM, METHOD FOR PRODUCING SAME, COMPOSITE OF POROUS RESIN FILM, AND FILTER ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/220960
Kind Code:
A1
Abstract:
The present invention discloses a microporous film comprising an object obtained by stretching a fluororesin film, wherein the fluororesin film comprises an object obtained by sintering a plurality of core/shell particles including fluororesins, the core/shell particles each comprising a core and a shell covering the outer surface of the core. The core/shell particles before being sintered have an average particle diameter of 100-1,000 nm and have a ratio of the volume of the shells to the volume of the cores of 2/98 to 50/50. The fluororesin of the cores is a tetrafluoroethylene/hexafluoropropylene copolymer, a tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, or a combination of these. The fluororesin of the shells is polytetrafluoroethylene. The fluororesins of the core/shell particles have a quantity of heat of first fusion of 68 J/g or less.
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Inventors:
KATAYAMA HIROKAZU (JP)
HAYASHI FUMIHIRO (JP)
OKUDA YASUHIRO (JP)
HAYASHI FUMIHIRO (JP)
OKUDA YASUHIRO (JP)
Application Number:
PCT/JP2019/018340
Publication Date:
November 21, 2019
Filing Date:
May 08, 2019
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C08J9/00; B01D69/00; B01D69/02; B01D69/10; B01D69/12; B01D71/32; B01D71/36; B32B5/24
Domestic Patent References:
| WO2013111690A1 | 2013-08-01 | |||
| WO2005061567A1 | 2005-07-07 |
Foreign References:
| JPH11240918A | 1999-09-07 |
Attorney, Agent or Firm:
MORITA Takeshi et al. (JP)
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