Title:
A manufacturing method of a fine porosity polyethylene film
Document Type and Number:
Japanese Patent JP5920602
Kind Code:
B2
Abstract:
A method of producing a microporous polyethylene film includes blending polyethylene and a membrane-forming solvent, stretching a sheet formed by extrusion through a die by stretching the sheet in the longitudinal direction at a stretching magnification of 1.1 to 2.0 and stretching the sheet simultaneously in the longitudinal direction and the width direction at an area magnification of 4 to 50, and removing the membrane-forming solvent.
Inventors:
Tatsuya Ito
Koichi Kono
Koichi Kono
Application Number:
JP2013525602A
Publication Date:
May 18, 2016
Filing Date:
April 20, 2012
Export Citation:
Assignee:
Toray Battery Separator Film Co., Ltd.
International Classes:
C08J9/28; B29C48/305; C08J9/00; H01M50/403; H01M50/406; H01M50/417; H01M50/491; H01M50/494
Domestic Patent References:
| JP2004083866A | ||||
| JP2005162773A |
Attorney, Agent or Firm:
Ichijo power