Title:
OPTICAL FILM, PROCESS FOR PRODUCING THE SAME, AND POLARIZATION PLATE UTILIZING THE FILM
Document Type and Number:
WIPO Patent Application WO/2008/023501
Kind Code:
A1
Abstract:
An optical film that even in the event of aging (storage) of optical film formed
into thin film and large width in the form of lengthy roll, is free from the danger
of sticking failure and protrusion failure attributed to uplift of the film due
to local film friction; a process for producing such an optical film; and a polarization
plate utilizing the optical film. The optical film is one of large width containing
a plasticizer, produced by a solution casting process, wherein the value (X)
calculated by formula (1) from the value (A) measured by TOF-SIMS with respect
to the plasticizer lying in the surface-side central area of the optical film
and the value (B) measured by TOF-SIMS with respect to the amount of plasticizer
lying in the backside central area of the optical film is different from the value
(X') calculated by formula (2) from the value (A') measured by TOF-SIMS
with respect to the amount of plasticizer lying in the surface-side two lateral
edge portions of the optical film and the value (B') measured by TOF-SIMS
with respect to the amount of plasticizer lying in the backside two lateral edge
portions of the optical film, and wherein the value (X) is smaller than the value
(X').
Inventors:
SHIBUYA, Masahiro (Inc. 2970 Ishikawa-machi, Hachioji-sh, Tokyo 05, 1928505, JP)
Application Number:
JP2007/063897
Publication Date:
February 28, 2008
Filing Date:
July 12, 2007
Export Citation:
Assignee:
Konica Minolta Opto, Inc. (2970, Ishikawa-machi Hachioji-sh, Tokyo 05, 1928505, JP)
コニカミノルタオプト株式会社 (〒05 東京都八王子市石川町２９７０番地 Tokyo, 1928505, JP)
コニカミノルタオプト株式会社 (〒05 東京都八王子市石川町２９７０番地 Tokyo, 1928505, JP)
International Classes:
G02B5/30; B29C41/28; B29C41/46