Title:
ポリビニルアルコール系重合体フィルムおよび偏光フィルム
Document Type and Number:
Japanese Patent JP5390052
Kind Code:
B1
Abstract:
[Problem] To provide a PVA-type polymer film which enables the production of a polarizing film having small unevenness in light transmittance between a center part and an edge part therein. [Solution] A PVA-type polymer film which fulfills the equation: 0.5 mm <= W0-W <= 5 mm, wherein W (mm) represents the amount of change in dimension of a center part of the PVA-type polymer film in water and W0 (mm) represents the amount of change in dimension (an averaged value) of a part located at a position apart by 0.3 m from either edge part of the PVA-type polymer film in water, wherein the center part and the part are located on a line drawn in the width direction (the direction perpendicular to the length direction) of the PVA-type polymer film (wherein the term "amount of change in dimension in water" means the amount of elongation of a sample of the PVA-type polymer film in the length direction as measured at a position located 250 mm apart from the edge of the film in the length direction of the film after immersing the sample in pure water having a temperature of 30°C for 5 minutes).
Inventors:
Ryoji Katsuno
Takashi Iki
Osamu Kazeto
Takashi Iki
Osamu Kazeto
Application Number:
JP2013538389A
Publication Date:
January 15, 2014
Filing Date:
March 06, 2013
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08J5/18; B29C41/26; B29C41/46; G02B5/30; B29K29/00; B29L7/00; B29L11/00
Domestic Patent References:
| JP2012042929A | 2012-03-01 | |||
| JP2007137042A | 2007-06-07 | |||
| JP2002028939A | 2002-01-29 |
Foreign References:
| WO2012002194A1 | 2012-01-05 |