公开(公告)号：US4676815A

公开(公告)日：1987-06-30

申请号：US847797

申请日：1986-04-03

申请人： Wolfram Wagner ,  Peter R. Nyssen ,  Gunter Espanion ,  Dirk Berkenhaus ,  Gunter Haladuda ,  Hans-Theo van Pey ,  Karl-Heinz Schott

发明人： Wolfram Wagner ,  Peter R. Nyssen ,  Gunter Espanion ,  Dirk Berkenhaus ,  Gunter Haladuda ,  Hans-Theo van Pey ,  Karl-Heinz Schott

IPC分类号： C03B37/022 ,  C03B37/06 ,  D01D5/14

CPC分类号： C03B37/06 ,  D01D5/14

摘要： Filaments of a molten material issue from a plurality of openings in a heated melt crucible and are further fiberized in a draw nozzle by means of a blowing medium. The diameter of the outlet openings (3) at the base of the melt crucible (1) is very small and is 0.2 to 1.5 mm, so that very fine primary filaments (12) are already formed at this point. These primary filaments are grasped by a very turbulent current at the entrance of the draw nozzle (5). The transverse component of the current decreasing in favor of the longitudinal component as the axial distance from the outlet openings (3) increases. The draw nozzle also has an inlet portion, which has a sharp outer edge and widens in the direction of flow, so that air blows against the primary filaments at a high speed and they are exposed to a strong pressure gradient in the longitudinal direction before entering the inlet portion. In the draw nozzle the primary filaments which are themselves already very thin are drawn out further until they have the required final diameter. For this purpose a zone is provided in the interior of the nozzle, following the inlet portion, in which zone the rate of flow of the blowing medium is 400 m/s to 600 m/s at a pressure of between 0.1 and 0.4 bar. By means of this device very fine mineral fibres with a substantially uniform fibre diameter of between 0.1 .mu.m and 5 .mu.m can be produced.

摘要翻译： 熔融材料的长丝从加热熔融坩埚中的多个开口出现，并通过吹塑介质进一步在牵引喷嘴中纤维化。 在熔融坩埚（1）底部的出口开口（3）的直径非常小，为0.2-1.5mm，从而在这一点上已经形成非常细的一次丝（12）。 这些初级细丝在拉伸喷嘴（5）的入口处被非常湍流的电流所夹持。 随着与出口（3）的轴向距离的增加，电流的横向分量有利于纵向分量。 牵引喷嘴还具有入口部分，其具有尖锐的外边缘并且在流动方向上变宽，使得空气以高速吹向初级细丝，并且在进入之前暴露于纵向方向上的强压力梯度 入口部分。 在拉丝喷嘴中，本身已经非常薄的主丝被进一步拉出，直到它们具有所需的最终直径。 为此，在喷嘴的内部设有一区域，在入口部分之后，在0.1-4.0巴的压力下，吹送介质的流速为400m / s至600m / s。 通过该装置，可以生产出具有0.1μm至5μm之间的基本上均匀的纤维直径的非常细的矿物纤维。