A polarizing plate protective film comprising a cellulose ester, and a saccharide ester compound in which all or a part of OH groups in Compound (A) or in Compound (B) are esterified, wherein Compound (A) consists of one of a furanose structure and a pyranose structure, and Compound (B) consists of two to twelve of at least one type of a furanose structure and a pyranose structure which are bonded in Compound (B); wherein the polarizing plate protective film exhibits Ro of 0-10 nm and Rt of −30 to +20 nm.
一种极化片保护膜,包括
纤维素酯和一种
糖酯化合物,其中化合物(A)或化合物(B)中的全部或部分OH基团被酯化,化合物(A)由
呋喃糖或
吡喃糖结构中的一种组成,化合物(B)由化合物(B)中至少一种
呋喃糖或
吡喃糖结构的两到十二个组成,这些结构在化合物(B)中被结合;其中,极化片保护膜的Ro值为0-10 nm,Rt值为-30到+20 nm。