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    • 39. 发明申请
    • PROCESS FOR PRODUCING FLAT CELLULOSE FILMS
    • 用于生产纤维素平膜
    • WO1996034037A1
    • 1996-10-31
    • PCT/DE1996000742
    • 1996-04-23
    • THÜRINGISCHES INSTITUT FÜR TEXTIL- UND KUNSTSTOFF-FORSCHUNG E.V.BERGHOF, KlausMICHELS, Christoph
    • THÜRINGISCHES INSTITUT FÜR TEXTIL- UND KUNSTSTOFF-FORSCHUNG E.V.
    • C08J05/18
    • C08J5/18B29C47/0026B29C47/0057B29C47/0059B29C55/28B29D7/01C08J2301/02
    • The invention relates to a process for producing flat cellulose films by the dry/wet extrusion method from a solution of cellulose in a water-containing N oxide of a tertiary amine, especially N-methylmorpholine-N-oxide, by extruding the solution through a die with an annular nozzle into a medium which does not precipitate the cellulose, drawing the extruded solution tube in said medium and precipitating the cellulose from the solution tube by agitation with a precipitating medium without substantial extension. The solution tube is drawn at the same time in the extrusion direction as it travels from the annular nozzle outlet to the precipitation medium, expanded by pressurised gas acting inside the tube in a ratio in the range from 1:1 to 1:10 and the precipitated tube film is cut down the edge after washing out the amine oxide, post-treatment and drying, and the film web is wound together or separately on one or two winding positions of a roll winding machine. The process facilitates the production of flat cellulose films with improved properties in use, especially improved mechanical properties, using the amine oxide process.
    • 用于根据从纤维素在叔胺,特别是N-甲基吗啉-N-氧化物通过在环形模头通过模头挤出该溶液的含水的N-氧化物的溶液中的干/湿挤出工艺制备纤维素平膜的方法 的纤维素没有沉淀介质,挤出的溶液管的延迟在该培养基中,并沉淀从溶液管中的纤维素成接触与沉淀介质而没有实质根据本发明的特征在于,所述溶液管同时是从环形喷嘴出口的路径进入到沉淀介质拉伸 翘曲在挤出方向,并通过有效地在1之间的范围内的比所述管内部气体压力:加宽1和1:10和根据洗出氧化胺randbeschneidet沉淀的管状薄膜,后处理和干燥和薄膜带一起 或在辊子上卷绕机中的一个或两个卷绕位置分别卷起。 该方法允许生产具有改进的服务属性的纤维素平膜的,根据氧化胺过程尤其改善的机械性能。