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    • 7. 发明公开
    • Coloured film
    • GefärbteSchicht。
    • EP0587282A1
    • 1994-03-16
    • EP93305523.8
    • 1993-07-14
    • COURTAULDS PLC
    • Snider, William Douglas
    • B41M5/035B41M1/30D06P5/00
    • B41M5/035B41M1/30Y10S8/933
    • A polyester film can be dyed by coating the film with a layer of a dye mixture which is a suspension of at least one disperse dyestuff in a solution of a thickener in water and which has a viscosity of no more than 500 centipoise, preferably 5-50 centipoise, at ambient temperature, followed by heating to cause the dyestuff to migrate from the layer into the film. The coating process is preferably reverse gravure printing. The process can be used to prepare films which contain one or more dyestuffs in one surface region of the film and one or more different dyestuffs, for example an ultraviolet absorber, in the other surface region of the film. The dyed films show good resistance to fading when exposed to light and are useful for example as automobile window films.
    • 可以通过将一层染料混合物(其是至少一种分散染料的悬浮液)涂覆在增稠剂在水中的溶液中并且粘度不超过500厘泊,优选5- 50厘泊,在环境温度下,然后加热使染料从层迁移到膜中。 涂覆方法优选是反向凹版印刷。 该方法可以用于制备在膜的一个表面区域中含有一种或多种染料的膜,以及在膜的另一表面区域中的一种或多种不同的染料,例如紫外线吸收剂。 染色的膜在暴露于光下时显示出良好的抗褪色性,并且例如可用作汽车窗膜。