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Title:
OPTICAL FILM AND PRODUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2015/002020
Kind Code:
A1
Abstract:
An optical film according to the prevent invention comprises a block copolymer hydride [2] in which all unsaturated bonds of a block copolymer [1] are hydrogenized. The block copolymer [1] comprises two or more of a polymer block [A], which has an aromatic vinyl compound-derived repeat unit as the main constituent, and one or more of a polymer block [B], which has a linear conjugated diene compound-derived repeat unit as the main constituent. When the weight fraction for the total of each polymer block [A] [B] within the entire block copolymer body is expressed as wA and wB, (wA:wB) is 40:60-80:20. In the optical film, the height from the apices of adjoining peaks in a die line, which is formed in the film length-direction, to the bottoms of troughs in the same is equal to or less than 100nm of the whole surface of the film, and the incline of a film-surface die line is equal to or less than 300nm/mm of the whole surface of the film. The present invention provides an optical film exhibiting few surface defects.

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Inventors:
ISHIGURO ATSUSHI (JP)
SAITO DAISUKE (JP)
KOHARA TEIJI (JP)
Application Number:
PCT/JP2014/066661
Publication Date:
January 08, 2015
Filing Date:
June 24, 2014
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
G02B5/30; B29C48/08; B29C48/30; B29C48/305; G02F1/1335; G02F1/13363; B29C48/04; B29C48/05
Domestic Patent References:
WO2009067290A12009-05-28
WO2009137278A12009-11-12
WO2011096389A12011-08-11
WO2012043708A12012-04-05
Foreign References:
JP2006283010A2006-10-19
JP2011503342A2011-01-27
JP2011523668A2011-08-18
JP2009237421A2009-10-15
JP2008225226A2008-09-25
JP2010008463A2010-01-14
JP2008015118A2008-01-24
JP2000219752A2000-08-08
JP2000280315A2000-10-10
JP2005128360A2005-05-19
JP2003114329A2003-04-18
US20100290117A12010-11-18
US20110038045A12011-02-17
Other References:
See also references of EP 3018506A4
Attorney, Agent or Firm:
OHISHI HARUHITO (JP)
Haruhito Oishi (JP)
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