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    • 9. 发明公开
    • Coupled spinning and dewatering process
    • Kombiniertes Spinn- undEntwässerungsverfahren。
    • EP0501689A2
    • 1992-09-02
    • EP92301447.6
    • 1992-02-21
    • Du Pont Canada Inc.E.I. DU PONT DE NEMOURS AND COMPANY
    • Samuels, Sam LouisZboril, Vaclav George
    • D01D5/11D01F6/04G01N25/02
    • D01F6/04D01D5/11
    • A continuous process for the manufacture of a fibrous material from a polyolefin. The process comprises feeding a solution of polyolefin dissolved in an organic solvent at elevated temperature and pressure to a spinneret (5). The exit of the spinneret is the inlet to an elongated vertical tube (12) and is located in an upper section of an elongated vertical vessel (1). The tube extends for a major portion of the length of the vessel. Solvent is removed from an upper section of the vessel and water is sprayed both down the tube (14) and into the vessel (13). The strands thus formed (20) are shredded in a self-cleaning self-feeding shredder (4) located at the bottom of the vessel. The shredded fibres and water are conveyed to a second vessel (2) having a baffle (16) located between the inlet (25) and outlet (24) thereof such that the shredded fibrous material passes from the inlet, over the baffle and to the outlet of the second vessel, the upper lip of the baffle being so that the level of water in the second vessel is in substantially the same horizontal plane as the shredder. An inert gas e.g. steam, is fed (23) to the second vessel to effect removal of volatile matter. The shredded fibres and liquid passing from the second vessel are fed to a dewatering device (3). The process may be used to manufacture fibrous polyolefin products e.g. in the form of a pulp. The preferred polyolefin is a high molecular weight homopolymer of ethylene or copolymer of ethylene and at least one C₄-C₁₀ hydrocarbon alpha-olefin.
    • 用于从聚烯烃制造纤维材料的连续方法。 该方法包括在高温和高压下将溶解在有机溶剂中的聚烯烃溶液加入到喷丝头中。 喷丝头的出口是细长垂直管的入口,并且位于细长垂直容器的上部。 管延伸到容器长度的主要部分。 将溶剂从容器的上部移除,并且水在管下方喷射到容器中。 将如此形成的股线切割在位于容器底部的自清洁自给粉碎机中。 切碎的纤维和水被输送到具有位于其入口和出口之间的挡板的第二容器,使得切碎的纤维材料从入口,挡板上方和第二容器的出口,挡板的上唇 使得第二容器中的水的水平与切碎机处于大致相同的水平面。 惰性气体,例如 蒸汽进料到第二容器中以除去挥发性物质。 从第二容器通过的切碎纤维和液体被送入脱水装置。 该方法可用于制造纤维聚烯烃产品,例如 以纸浆的形式。 优选的聚烯烃是乙烯的高分子量均聚物或乙烯与至少一种C 4 -C 10烃α-烯烃的共聚物。