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METHOD FOR PRODUCING LAMINATED POROUS FILM, AND LAMINATED POROUS FILM

  • US 20140234538A1
  • Filed: 09/18/2012
  • Published: 08/21/2014
  • Est. Priority Date: 09/22/2011
  • Status: Active Grant
First Claim
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1. A method of producing a laminated porous film comprising a porous coating layer formed on a porous resin film consisting of a single layer or a laminate of a plurality of layers by applying a coating solution containing a metal oxide, a resin binder, and a volatile acid to at least one outer surface of said porous resin film and drying said coating solution,wherein a pH (pH1) of said coating solution is so adjusted that a difference between said pH (pH1) of said coating solution and a pH (pH2) of said coating layer is not less than 2.

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