Title:
POROUS FILM ROLL
Document Type and Number:
Japanese Patent JP2013067783
Kind Code:
A
Abstract:
To provide a porous film roll, wherein decrease in planarity of a film due to wrinkles generated upon winding is improved.
The porous film roll is obtained by winding a porous film around a winding core, wherein when measuring hardness at an interval of 10 mm in the width direction across the full width and assuming that an average value is Ha and hardness at an optional measuring point is Hi, at least two parts having high hardness which satisfies the following formula (1): (1) 1.1×Ha≤Hi≤2.0×Ha.
Inventors:
OKADA KAZUMA
KUMAN TAKUYA
OKURA MASATOSHI
KUMAN TAKUYA
OKURA MASATOSHI
Application Number:
JP2012193712A
Publication Date:
April 18, 2013
Filing Date:
September 04, 2012
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08J9/00; H01G9/02; H01M2/16
Previous Patent: JP2013067782
Next Patent: METHOD OF MANUFACTURING COPOLYMER LATEX AND COPOLYMER LATEX
Next Patent: METHOD OF MANUFACTURING COPOLYMER LATEX AND COPOLYMER LATEX