Patent ID: 9040129
Filing Date: 2015-05-26
Classification: B32B,C08J,C08K,C08L,C09K,Y10T

Abstract:
1. A protective film to a polarizer containing a cellulose acylate and an organic acid having an octanol/water partition coefficient of at least 3.0 and satisfying one of the following requirements: (1): The surface of the film has a pH of from 3.0 to 4.5; or (2): The surface of the film has a pH of more than 4.5 and at most 6.0, and wherein the film has a moisture permeability of at least 2800 g/m the protective film to a polarizer comprising an organic acid represented by the following formula (1), wherein the ratio of the organic acid to the cellulose acylate is from 0.01 to 10% by mass: wherein: X represents an acid group wherein the acid dissociation constant is 5.5 or less; L represents a single bond, or a di- or more valent linking group; R n represents 1 when L is a single bond, or represents the number expressed by: when L is a di- or more valent linking group.