Patent ID: 8711301
Filing Date: 2014-04-29
Classification: B29C,B29K,C08L,C09K,Y10T

Abstract:
1. A cellulose acylate laminate film, which comprises: a low-substitution layer comprising a non-phosphate compound and a cellulose acylate that satisfies the following formula (1): wherein Z1 means the total degree of acyl substitution of the cellulose acylate of the low-substitution layer, and a high-substitution layer comprising a cellulose acylate that satisfies the following formula (2): wherein Z2 means the total degree of acyl substitution of the cellulose acylate of the high-substitution layer, and wherein: the high-substitution layer is laminated on at least one face of the low-substitution layer, the in-plane retardation of the film at a wavelength of 550 nm, Re (550), is the same as or larger than the in-plane retardation of the film at a wavelength of 440 nm, Re (440), and the thickness-direction retardation of the film at a wavelength of 550 nm, Rth (550), is the same as or larger than the thickness-direction retardation of the film at a wavelength of 440 nm, Rth (440).