OPTICAL FILM ROLL, METHOD FOR PRODUCING SAME, POLARIZING PLATE, AND DISPLAY DEVICE

WIPO Patent Application WO/2014/091921

A1

The present invention addresses the problem of providing an optical film roll which exhibits an elastic modulus within the plane of the film in an angled direction in relation to the lengthwise direction thereof, is unlikely to produce a shift in the rolling of the roll even due to moisture during storage or transport thereof, and has a uniform optical value even during storage or after transport thereof. This optical film roll is a lengthwise-oriented optical film roll in which the direction (A) having the maximum elastic modulus in the plane of the film is angled in relation to the lengthwise direction thereof, and the ratio of the values of the elastic modulus (EA) in the direction (A) having the maximum value to the elastic modulus (EB) in a direction (B) perpendicular to the direction (A) is 1.4≤EA/EB. The optical film roll is characterized by having an embossed section on both ends thereof having a height within the range of 1-20μm, and in that the crushing resistance (%) stipulated by formula (1) of the embossed sections is at least 50% for the embossed sections on both ends. (Formula 1) Crushing resistance (%) = D/Do×100% (Do and D are the heights of the projections before and after applying weight to the embossed sections.)

SUZUKI SHINICHIRO (JP)
MURAKAMI TAKASHI (JP)

PCT/JP2013/081744

June 19, 2014

November 26, 2013

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KONICA MINOLTA INC (JP)

B65H75/00; B29C55/04; G02B5/30

WO2013140433A1

2013-09-26

JP2012030542A	2012-02-16
JP2010274615A	2010-12-09

KOYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Mitsuaki international patent firm (JP)

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