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    • 4. 发明授权
    • Pelletized pre-dope granules of cellulose and tertiary amine oxide,
spinning solution, of cellulose and process for making them
    • 颗粒状预纤维素纤维素和叔胺氧化物颗粒,纺丝溶液,纤维素及其制备方法
    • US5584919A
    • 1996-12-17
    • US302017
    • 1994-09-09
    • Wha S. LeeSeong M. JoHo J. KangDong B. KimChong S. Park
    • Wha S. LeeSeong M. JoHo J. KangDong B. KimChong S. Park
    • C08B1/00C08J3/20D01F2/00C08L1/02C08L1/24
    • D01F2/00C08B1/003C08J3/203C08J2301/02
    • This specification discloses pelletized pre-dope granules of cellulose and a tertiary amine oxide wherein the tertiary amine oxide is homogeneously dispersed throughout the cellulose and a process for making them. According to the invention, the pelletized pre-dope granules can be prepared by a process comprising of the steps of feeding cellulose to a mill with knife-edged blades, together with the tertiary amine oxide powder having a water content of 5 to 17% by weight; and milling and blending the resulting solid mixture in the blender, while heating the solid mixture at a temperature sufficient to agglomerate as a result of instantaneous melting of tertiary amine oxide powder and simultaneous penetration of the molten amine oxide into cellulose without dissolving the cellulose. The pre-dope granules thus obtained can be used in making shaped cellulosic articles such as fibers and films. According to the invention, the shaped cellulosic articles can be produced from the process comprising the steps of heating the pre-dope granules in the barrel of an extruder to give a dope solution, extruding the resulting dope solution to provide an extrudate to be spun, and spinning the extrudate through a spinnerette or die.
    • 本说明书公开了纤维素和叔胺氧化物的颗粒状预涂料颗粒,其中叔胺氧化物均匀地分散在整个纤维素中以及制备它们的方法。 根据本发明,造粒的预涂料颗粒可以通过以下方法制备,所述方法包括以下步骤:将纤维素与刀刃一起进料到研磨机中,同时将含水率为5〜17%的叔胺氧化物粉末与 重量; 并将所得固体混合物研磨并混合在混合器中,同时由于叔胺氧化物粉末的瞬时熔化和熔融的氧化胺同时渗透到纤维素中而不溶解纤维素,在足以凝聚的温度下加热固体混合物。 由此获得的预掺杂颗粒可用于制造成形纤维素制品如纤维和薄膜。 根据本发明,成形纤维素制品可以由包括以下步骤的方法制备,所述方法包括以下步骤:在挤出机的筒中加热预涂料颗粒,得到涂料溶液,挤出所得的涂料溶液以提供待纺丝的挤出物, 并通过喷丝板或模具将挤出物纺丝。