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公开(公告)号：US4166090A
公开(公告)日：1979-08-28
申请号：US820388
申请日：1977-07-29
CPC分类号： A24D3/0233 , D21J3/00 , D21J3/06 , D21J7/00
摘要： A process for continuously forming a fibrous element in an elongate closed foraminous former during movement of the former through fluid extraction means, and which includes the steps of forming a fibrous dispersion, injecting the dispersion into said former, generating a pressure gradient across an extraction zone within said fluid extraction means and injecting the fibrous dispersion into the former at an injection velocity relative to the speed of the former (efflux ratio) to cause some of the fibres to build up as a fibrous mat on the inner surface of the former and the remainder to pack together to form a core so as to produce a continuous fibrous element having a fibrous core which is enclosed by a crust of greater density.
摘要翻译： 用于制造纤维元件的装置包括由至少一个多孔带提供的细长的多孔原子，具有多孔形成室，所述带通过所述多孔形成室，并且由此形成为中空形状。 带被驱动通过成形室，并且流体在包围至少部分成形室的流体提取区域中被抽出并由封闭的排水套管形成。 注射喷嘴将纤维分散体注射到所述成形室内的前者中，其中喷嘴的尺寸被设计成基本上排除了与所述带的壁的界面周围的空气的进入，使得该装置产生具有外部的细长的纤维元件 核心的密度比其围绕的内核更大。
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公开(公告)号：US4257754A
公开(公告)日：1981-03-24
申请号：US12816
申请日：1979-02-16
CPC分类号： A24D3/0233 , D21J3/00 , D21J3/06 , D21J7/00
摘要： Apparatus for making a fibrous element includes an elongate foraminous former provided by at least one foraminous belt, with a foraminous forming chamber through which said belt passes and which is formed to a hollow shape thereby. The belt is driven through the forming chamber, and fluid is extracted in a fluid extraction zone which surrounds at least part of the forming chamber and formed by a closed drainage casing. An injection nozzle injects a fibrous dispersion into the former within said forming chamber with the injection nozzle being dimensioned so as to substantially exclude the ingress of air around an interface with the walls of said belt so that the apparatus produces an elongate fibrous element having an outer core of greater density than the inner core which it surrounds.
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