| 摘要 |
An apparatus (10) and method for producing a non-woven polymeric fabric web, such as a spunbond web having filaments of 0.1 to 5 or higher denier with equivalent production rates is provided. A plurality of continuous polymeric filaments (F) are extruded from an extruder (22) and attenuated by a drawing unit (31) that includes a longitudinal elongated slot (32) strategically positioned at an optimum distance very close to the spinneret (26) to increase the filament velocity by reducing air viscous drag on filaments (F), and the drawing unit slot (32) having a lower slot length of approximately 210 mm or less to increase form drag. A web forming table (90) is positioned below the drawing unit (31) for collecting the filaments (F) and forming the filaments (F) into a non-woven fabric web. Filaments of increased tensile strength are created by stress-induced crystallization resulting from higher filament velocity due to increased force on the filaments with less air viscous drag between the filaments and air streams.
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