Title:
MICROPOROUS FILM ROLL AND PRODUCTION METHOD THEREOF
Document Type and Number:
Japanese Patent JP2016027139
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a microporous film roll capable of reducing occurrence of curvature and sag on a taken-out olefin-based resin microporous film.SOLUTION: Provided is a microporous film roll which is formed by winding an olefin-based resin microporous film around a lead body, in which difference of adjacent outer peripheral lengths is equal to or less than 1.5 mm on outer peripheral length of the microporous film roll measured for 10 mm interval from one end to the other end, difference between maximum outer peripheral length and minimum outer peripheral length is equal to or less than 3 mm, and the microporous film roll satisfies the formula (1): [(D/2-d/2)/w]×[(h-h)/t]<200. (In the formula, D is average outer diameter (mm) of the microporous film roll, d is average outer diameter (mm) of the lead body, w is average width (mm) of the olefin-based resin microporous film, his maximum outer peripheral length of the microporous film roll, his minimum outer peripheral length of the microporous film roll, and t is average thickness (mm) of the olefin-based resin microporous film).SELECTED DRAWING: Figure 1
More Like This:
Inventors:
OGAWA AKIHIRO
Application Number:
JP2015129005A
Publication Date:
February 18, 2016
Filing Date:
June 26, 2015
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
C08J9/00; H01M2/16
Attorney, Agent or Firm:
Takuya Yamamoto
Previous Patent: PRODUCTION METHOD OF COKE
Next Patent: β-CHITIN NANOFIBER AND PRODUCTION METHOD THEREOF
Next Patent: β-CHITIN NANOFIBER AND PRODUCTION METHOD THEREOF