申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0052927A2
公开(公告)日:1982-06-02
A monoaxially or biaxially stretched film structure, or a heat-set structure thereof, of an unstretched film of an aromatic polyester having an intrinsic viscosity, determined in p-chlorophenol at 50°C, of 0.4 to 2.0 and composed of [A] polybasic carboxylic acid component units consisting of terephthalic acid units (a1) and units (a2) of a polybasic carboxylic acid otherthan terephthalic acid, the proportion of the units (a2) being up to 25 mole% based on the units (a,) and units (a2) combined, and [B] polyol component units consisting of resorcinol units (b1) and units (b2) of a polyol other than resorcinol, the proportion of the units (b2) being up to 25 mole% based on the units (b1) and (b2) combined.
一种单轴或双轴拉伸薄膜结构,或其热固结构,由芳香族聚酯的未拉伸薄膜组成,其固有粘度(在对氯苯酚中于 50℃测定)为 0.4 至 2.A] 由对苯二甲酸单元(a1)和对苯二甲酸以外的多基性羧酸单元(a2)组成的多基性羧酸组分单元,单元(a2)的比例为单元(a. )和单元(a2)总和的 25 摩尔%、)和单元(a2)的总和,单元(a2)的比例不超过 25 摩尔%,以及 [B] 由间苯二酚单元(b1)和间苯二酚以外的多元醇单元(b2)组成的多元醇组分单 元,单元(b2)的比例不超过 25 摩尔%,单元(b1)和单元(b2)的总和。