申请人:TORAY INDUSTRIES, INC.
公开号:EP0053498A2
公开(公告)日:1982-06-09
The present invention provides a polyester laminated film which comprises a transparent layer (1) and a delustered layer (2) laminated at least on one side face of the transparent layer. The transparent layer is formed by a biaxially stretched polyester film mainly composed of polyethylene terephthalate, while the delustered layer is made of an at least uniaxially stretched polyester film which is mainly composed of a polyethylene terephthalate copolymer containing, as a copolymer composition, 1 to 20 mol.% of the delustered layer of
or
(wherein n is an integer from 2 to 140, and X represents
or
and which also contains inert inorganic particles (2') of 0.3 to 20 microns diameter in an amount 3 to 40% by weight of the delustered layer.
Film according to the present invention as described above is roughened on the surface, and has excellent writability and transcribability by pencils, ink, indian ink, etc., combined with an excellent transparency, and therefore, is very useful for use as tracing films and the like.
本发明提供了一种聚酯层压薄膜,它包括透明层(1)和至少在透明层一侧面上层压的除尘层(2)。透明层由主要由聚对苯二甲酸乙二醇酯组成的双轴拉伸聚酯薄膜构成,而除尘层由至少单轴拉伸聚酯薄膜制成,该聚酯薄膜主要由聚对苯二甲酸乙二醇酯共聚物组成,其共聚物成分中含有 1 至 20 mol.% 的除尘层,其中包括
或
(其中 n 为 2 至 140 的整数,X 代表
或
),其中还含有直径为 0.3 至 20 微米的惰性无机颗粒 (2'),含量为除尘层重量的 3 至 40%。
根据上述本发明的薄膜表面粗糙,用铅笔、墨水、印度墨水等书写和誊写时具有极佳的可书写性和可誊写性,同时具有极佳的透明度,因此非常适合用作描图薄膜等。