METHOD FOR PRODUCING POROUS POLYIMIDE FILM, POROUS POLYIMIDE FILM AND SEPARATOR USING SAME

METHOD FOR PRODUCING POROUS POLYIMIDE FILM, POROUS POLYIMIDE FILM AND SEPARATOR USING SAME

  • CN 104,853,919 A
  • Filed: 03/31/2014
  • Published: 08/19/2015
  • Est. Priority Date: 04/22/2013
  • Status: Active Application
First Claim
Patent Images

1. a manufacture method for porous polyimide film, it comprises:

  • First does not burn till composite membrane film formation process, use comprises (A1) polyamic acid or polyimides and (B1) particulate and (A1) is first varnish of 19;

    81 ~ 45;

    65 with the volume ratio of (B1), substrate makes first do not burn till composite membrane film forming;

    Second does not burn till composite membrane film formation process, use comprises (A2) polyamic acid or polyimides and (B2) particulate, (A2) is 20;

    80 ~ 50;

    50 with the volume ratio of (B2) and particulate contains second varnish of ratio lower than described first varnish, does not burn till on composite membrane make second not burn till composite membrane film forming described first;

    Firing process, does not burn till the composite membrane that do not burn till that composite membrane and described second do not burn till composite membrane and burns till to comprising described first and obtain polyimides-particulate composite membrane;

    WithParticulate removal step, from described polyimides-particulate composite membrane removing particulate.

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