公开(公告)号：US20170157900A1

公开(公告)日：2017-06-08

申请号：US15433768

申请日：2017-02-15

Applicant: FUJIFILM Corporation

Inventor： Takashi TAMADA ,  Koji IIJIMA ,  Nobuhiko ICHIHARA

IPC: B32B23/08 ,  G02F1/1335 ,  B32B27/30 ,  G02B5/30 ,  B32B23/20 ,  B32B23/16

CPC classification number: B32B23/08 ,  B32B23/16 ,  B32B23/20 ,  B32B27/306 ,  B32B2255/26 ,  B32B2307/42 ,  B32B2457/202 ,  C08J7/065 ,  C08J2301/10 ,  G02B5/3033 ,  G02B5/305 ,  G02F1/133528 ,  Y10T428/105

Abstract: The present invention provides a cellulose acylate film, containing: an organic acid satisfying requirements of a to c, in which a film thickness of the cellulose acylate film is greater than or equal to 3 μm, and an average concentration of the organic acid in a region from one surface of the cellulose acylate film to a depth of 0 to 0.2 λm is lower than an average concentration of the organic acid in a residual region other than the region: a: having a structure in which polyhydric alcohol and a polyvalent carboxylic acid are bonded by forming an ester bond; b: the total number of molecules of polyhydric alcohol and a monovalent or more carboxylic acid forming the organic acid being greater than or equal to 3; and c: having at least one non-substituted carboxyl group derived from a polyvalent carboxylic acid.