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2. 发明授权

US06228569B1 Photographic element comprising polyethylene terephthalate film base and antihalation layer 失效
标题翻译：摄影元件包括聚对苯二甲酸乙二醇酯薄膜基材和防光晕层
公开(公告)号：US06228569B1
公开(公告)日：2001-05-08
申请号：US09315645
申请日：1999-05-20
申请人： Larry K. Maier , Timothy F. Cilano , Fred D. Kelley , Frank D. Manioci , Diana C. Petranek , Michael Schild
发明人： Larry K. Maier , Timothy F. Cilano , Fred D. Kelley , Frank D. Manioci , Diana C. Petranek , Michael Schild
IPC分类号： G03C183
CPC分类号： G03C1/7954 , G03C1/795 , G03C1/832 , G03C2200/43
摘要： A silver halide light sensitive photographic element is disclosed comprising a polyethylene terephthalate film base, at least one light sensitive silver halide-containing emulsion layer, an antihalation undercoat layer, and a process-surviving antistatic backcoat, wherein the polyethylene terephthalate film base has been formed by drafting a cast resin at a stretch ratio of at least 3.4, tentering at a stretch ratio of at least 3.4, and heat-setting at an actual heat-set temperature of at least 216° C. In accordance with preferred embodiments of the invention, the polyethylene terephthalate film base of the photographic element is formed by: (a) casting a molten polyethylene terephthalate resin in a machine direction onto a casting surface to form a continuous sheet, (b) drafting the sheet by stretching in the machine direction at a stretch ratio of from 3.4 to 4, and at a temperature ranging from 70 to 130° C., (c) tentering the sheet in the transverse direction by stretching at a stretch ratio of from 3.4 to 4, and at a temperature ranging from 70 to 130 C., (d) heat-setting the tentered sheet at an actual temperature sensed by the sheet of at least 216° C., and (e) cooling the heat-set sheet without substantial detentering to obtain a stretched, heat-set polyethylene terephthalate film.
摘要翻译：公开了一种卤化银感光照相材料，其包括聚对苯二甲酸乙二醇酯膜基材，至少一种含有感光性卤化银的乳剂层，防光晕底涂层和工艺存在的抗静电背涂层，其中形成了聚对苯二甲酸乙二醇酯膜基材通过以至少3.4的拉伸比拉伸浇注树脂，以至少3.4的拉伸比拉伸，并且在至少216℃的实际热定型温度下进行热定型。根据本发明的优选实施方案照相元件的聚对苯二甲酸乙二醇酯膜基材通过以下方法形成：（a）在机器方向上将熔融的聚对苯二甲酸乙二醇酯树脂浇铸到铸造表面上以形成连续片材，（b）通过沿机器方向拉伸来拉伸片材拉伸比为3.4至4，温度范围为70至130℃，（c）通过拉伸在横向上将片材拉伸为拉伸比为3.4至4，温度为70至130℃，（d）将片状物在由片材感测到的实际温度下至少216℃进行加热，（e）冷却该热定型片没有大量的滞留，以获得拉伸的热固性聚对苯二甲酸乙二醇酯膜。

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