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Title:
FILM ROLL AND METHOD FOR MANUFACTURING FILM ROLL
Document Type and Number:
WIPO Patent Application WO/2022/153785
Kind Code:
A1
Abstract:
A problem addressed by the present invention is to provide a film roll that can maintain quality while causing less winding failure during transportation or long-term storage, and also to provide a method for manufacturing the film roll, the method achieving high yield and drastically reducing inspection load.　The film roll according to the present invention is a film roll in which a single-layer optical film is wound, the film roll being characterized in that the average maximum height difference of the film thickness (P-V) ave1 as measured in a region of 1000mm diameter around an arbitrary point in the optical film as the center is 0.15 to 0.40μm, and that the ratio (Dc/De) of the outer diameter Dc of the central section to the outer diameter De of the end section of the film roll is 0.98 to 1.02.

Inventors:
NAKAE HAZUKI (JP)
TANAKA HIROFUMI (JP)
ICHIKAWA YUSUKE (JP)
FUJIEDA NANAE (JP)
NANJIYOU TAKASHI (JP)
Application Number:
PCT/JP2021/046677
Publication Date:
July 21, 2022
Filing Date:
December 17, 2021
Export Citation:
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Assignee:
KONICA MINOLTA INC (JP)
International Classes:
C08J5/18; G02B5/30
Domestic Patent References:
WO2018159424A12018-09-07
WO2013065587A12013-05-10
WO2020149206A12020-07-23
WO2013161581A12013-10-31
WO2017022706A12017-02-09
WO2014073020A12014-05-15
WO2018021212A12018-02-01
Foreign References:
JP2009083322A2009-04-23
JP2004009552A2004-01-15
JP2019174636A2019-10-10
JP2017122856A2017-07-13
JPH0691748A1994-04-05
JPH0339332A1991-02-20
US20020033556A12002-03-21
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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