Title:
The manufacturing method of the porous membrane made from polyethylene, and the porous membrane made from polyethylene
Document Type and Number:
Japanese Patent JP6146781
Kind Code:
B2
Abstract:
Disclosed is a polyethylene porous film having an average pore diameter of 200 nm or less, a specific surface area of 50 m 2 /g or more, and a porosity of 15% or more, each of which is measured by a mercury intrusion method at room temperature, the polyethylene porous film being obtained by forming pores only by drawing a film containing an ultrahigh molecular weight polyethylene having a viscosity average molecular weight of from 1 million to 15 million and a polyethylene having a weight average molecular weight of from 10,000 to 800,000 at a mass ratio of from 50:50 to 99:1. The polyethylene porous film is produced by molding a film using a mixture of the ultrahigh weight polyethylene and the polyethylene having a weight average molecular weight of from 10,000 to 800,000, biaxially drawing the film, then heat-treating and redrawing the film to form pores in the film.
Inventors:
Hiroki Uehara
Ken Yamanobu
Hidekazu Tanaka
Ken Yamanobu
Hidekazu Tanaka
Application Number:
JP2014532925A
Publication Date:
June 14, 2017
Filing Date:
August 16, 2013
Export Citation:
Assignee:
Gunma University
International Classes:
C08J9/00; H01M50/417; H01M50/489; H01M50/494
Domestic Patent References:
| JP2007314764A | ||||
| JP200044709A |
Foreign References:
| WO2010101214A1 | ||||
| WO2008069216A1 | ||||
| WO2008118660A1 |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Hiroshi Fukuda
Kato Kazunori
Hiroshi Fukuda
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