Title:
偏光子保護用ポリエステルフィルム及びそれを用いてなる偏光板
Document Type and Number:
Japanese Patent JP6504052
Kind Code:
B2
Abstract:
[Problem] To provide a polarizer-protecting polyester film which does not exhibit interference colour when disposed in a crossed-Nicols state despite being a biaxially stretched polyester film, does not exhibit interference fringes caused by the effects of film front-surface reflection and film rear-surface reflection, and exhibits excellent transparency, excellent winding properties despite being a thin film, and excellent adhesive properties with respect to an adhesive agent used for bonding together a polarization film and a protective film. [Solution] This polarizer-protecting polyester film is a stacked polyester film obtained by providing a crosslinking-material-containing resin layer (X) to both surfaces of a polyester film which has a retardation at a wavelength of 590 nm of not more than 280 nm, and a Young's modulus at 25˚C in the length direction and the width direction respectively of at least 1000 MPa, but less than 4000 MPa. The polarizer-protecting polyester film is characterized in that the amplitude (∆R) of a vibration waveform derived from the spectral reflectance curve of the stacked polyester film is not more than 8%.
Inventors:
Hitomi Furukawa
Wataru Goda
Wataru Goda
Application Number:
JP2015520442A
Publication Date:
April 24, 2019
Filing Date:
April 02, 2015
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
G02B5/30
Domestic Patent References:
| JP2013064821A | ||||
| JP2009157361A | ||||
| JP2012192737A |
Foreign References:
| WO2014156726A1 |