A cellulose acylate film is provided and satisfies the following relationships (I) and (II). The cellulose acylate film has a residual sulfuric acid content of 0 ppm to 100 ppm and contains a release accelerator in an amount of 10 ppm to 2,000 ppm.
0≦
Re
(630)≦10 and |
Rth
(630)|≦25 (I)
|
Re
(400)−
Re
(700)|≦10 and |
Rth
(400)−
Rth
(700)|≦35 (II)
Re(λ) is an in-plane retardation value at a wavelength of λ nm, and Rth(λ) is a thickness-direction retardation value at a wavelength of λ nm.
Transparent Film And Optical Compensatory Film, Polarizing Plate And Liquid-Crystal Display Device Employing It
申请人:Nakayama Hajime
公开号:US20070285603A1
公开(公告)日:2007-12-13
A novel transparent film is disclosed. Re (λ) and Rth (λ) of the film defined by the following formulae (I) and (II) satisfy the following formulae (III) and (IV):
Re
(λ)=(
nx−ny
)×
d,
(I)
Rth
(λ)=(
nx+ny
)/2
−nz}×d,
(II)
0≦|
Re
(630)|≦50, (III)
Rth
(400)×
Rth
(700)≦0, and 0<|
Rth
(700)−
Rth
(400)|≦150, (IV)
wherein Re (λ) means an in-plane retardation value at a wavelength λ nm (unit: nm); Rth (λ) means a thickness-direction retardation value at a wavelength λ nm (unit: nm); nx means a refractive index in the in-plane slow-axis direction; ny means a refractive index in the in-plane fast-axis direction; nz means a refractive index in the film thickness direction; and d means a thickness of the film.
Shostakovskii,M.F. et al., Journal of general chemistry of the USSR, 1960, vol. 30, p. 69 - 72
作者:Shostakovskii,M.F. et al.
DOI:——
日期:——
Mortimer, Australian Journal of Chemistry, 1958, vol. 11, p. 82,84