Title:
FILM ROLL, MANUFACTURING METHOD OF THE SAME, AND FILM ROLL EVALUATION METHOD
Document Type and Number:
Japanese Patent JP2022018161
Kind Code:
A
Abstract:
To provide a long film roll that includes a knurl region and a flat region with less winding misalignment and quality deterioration.SOLUTION: A film roll is formed by winding a long film. The long film includes two knurl regions provided at both ends in a width direction and including a plurality of convex portions, and a flat region provided between the two knurl regions. The film roll has a plurality of protruding portions that protrude radially outward. At an axial center of the film roll, the number of the plurality of protruding portions is 19 or more and 32 or less.SELECTED DRAWING: Figure 1
Inventors:
UEMURA NOBUYUKI
YOSHITOMI YASUMASA
YOSHITOMI YASUMASA
Application Number:
JP2020121064A
Publication Date:
January 27, 2022
Filing Date:
July 15, 2020
Export Citation:
Assignee:
NIPPON ZEON CO
International Classes:
B65H75/10
Attorney, Agent or Firm:
Sakai International Patent Office
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