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    • 2. 发明授权
    • Laminated polyester film
    • 层压聚酯薄膜
    • US6136420A
    • 2000-10-24
    • US151402
    • 1998-09-11
    • Takashi HibiyaTakatoshi Miki
    • Takashi HibiyaTakatoshi Miki
    • B32B27/18B32B27/36B32B3/26
    • B32B27/18B32B27/36Y10S428/91Y10T428/2495Y10T428/24967Y10T428/24992
    • A laminated polyester film is disclosed which contains not more than 0.05% by weight of a fluorescent agent. The film comprises a fine cell-containing polyester film that contains 55 to 95% by weight of polyester and 5 to 45% by weight of an immiscible thermoplastic resin, said fine cell-containing polyester film having a density of 0.40 to 1.30 g/cm.sup.3 and at lest one other polyester. The other polyester film is laminated as an outermost layer on at least one of the surfaces of the fine cell-containing polyester film. It has a density of not less than 0.40 g/cm.sup.3 and not less than 0.01% by weight of a fluorescent whitening agent. The concentration of the fluorescent whitening agent in the other polyester film is higher than that in the fine cell-containing polyester film.
    • 公开了一种层压聚酯薄膜,其含有不超过0.05重量%的荧光剂。 该薄膜包含含有聚合物重量百分比为55-95%,不混溶热塑性树脂为5-45%重量的含细胞的聚酯薄膜,所述含细胞的聚酯薄膜的密度为0.40至1.30g / cm3 并且至少另外一个聚酯。 将另一种聚酯膜作为最外层层叠在含微细电池的聚酯膜的至少一个表面上。 其密度不小于0.40g / cm 3,并且不小于0.01重量%的荧光增白剂。 其他聚酯膜中的荧光增白剂的浓度高于含细胞的聚酯膜。