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    • 3. 发明申请
    • PHOTOGRAPHIC ELEMENT CONTAINING THIN TRANSPARENT MAGNETIC RECORDING LAYER AND METHOD FOR THE PREPARATION THEREOF
    • 包含薄透明磁记录层的摄影元件及其制备方法
    • WO1991011750A1
    • 1991-08-08
    • PCT/US1991000579
    • 1991-01-30
    • EASTMAN KODAK COMPANY
    • EASTMAN KODAK COMPANYJAMES, Robert, OwenRIETH, John, Edward
    • G03C05/14
    • B29C47/065B05C5/0254B05C9/06B29C47/0021B29C47/0047G03C1/74G03C1/795G03C5/14G03C2001/7459G11B5/633G11B5/848
    • A photographic element comprising a photosensitive layer, a flexible cellulose organic ester support film, and a substantially transparent magnetic recording layer having a dried thickness of less than about 1.5 micron exhibits improved magnetic and photographic performance and is particularly valuable as a color or black and white negative or reversal film. A method of preparing the above-described element comprises the steps of continuously extruding a layer of a cellulose organic acid ester solution from a hopper toward a polished casting surface which is moving relative to the hopper; continuously extruding simultaneously a layer of a magnetic dispersion from the same hopper onto the extruded layer of cellulose organic acid ester; depositing the combined layers onto the casting surface with the cellulose organic acid ester layer engaging the polished surface; and stripping the combined support film and magnetic recording layer from the casting surface when the layers are sufficiently set to be self-supporting and to allow such stripping. The method is more efficient and less costly than prior art processes and avoids the need for large quantities of solvents and complex processing steps.
    • 包含感光层,柔性纤维素有机酯支撑膜和具有小于约1.5微米干燥厚度的基本上透明的磁记录层的照相元件表现出改进的磁性和照相性能,并且作为颜色或黑白色特别有价值 阴性或反转膜。 制备上述元件的方法包括以下步骤:将纤维素有机酸酯溶液层从料斗连续挤出到相对于料斗移动的抛光铸造表面; 将来自同一料斗的一层磁性分散体连续挤出到纤维素有机酸酯的挤出层上; 将所述组合层沉积在所述铸造表面上,所述纤维素有机酸酯层与所述抛光表面接合; 并且当层被充分地设定为自支撑并且允许这种剥离时,从铸造表面剥离组合的支撑膜和磁记录层。 该方法比现有技术方法更有效且成本更低,并且避免了对大量溶剂的需要和复杂的处理步骤。