Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Woven fabric – Including strand which is of specific structural definition
Patent
1995-06-07
1997-07-01
Bell, James J.
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Woven fabric
Including strand which is of specific structural definition
139420A, 139426R, 442194, D03D 300
Patent
active
056436602
ABSTRACT:
A melt spinning process and the nylon hollow filaments and yarns made by such process which includes extruding molten nylon polymer having a relative viscosity (RV) of at least about 50 and a melting point (T.sub.M) of about 210.degree. C. to about 310.degree. C. from a spinneret capillary orifice with multiple orifice segments providing a total extrusion area (EA) and an extrusion void area (EVA) such that the fractional extrusion void content, defined by the ratio [EVA/EA] is about 0.6 to about 0.95, and the extent of melt attenuation, defined by the ratio [EVA/(dpf).sub.S ], is about 0.05 to about 1.5, in which (dpf).sub.S is the spun denier per filament, the (dpf).sub.S being selected such that the denier per filament at 25% elongation (dpf).sub.25 is about 0.5 to about 20 denier; withdrawing the multiple melt streams from the spinneret into a quench zone under conditions which causes substantially continuous self-coalescence of the multiple melt streams into spun filaments having at least one longitudinal void and a residual draw ratio (RDR) of less than 2.75; and stabilizing the spun hollow filaments to provide hollow filaments with a residual draw ratio (RDR) of about 1.2 to about 2.25.
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Translation of Japan 59-49,328 (Published Dec. 1, 1984).
Bennett James Preston
Knox Benjamin Hughes
Price David Arthur
Schafluetzel Dennis Raymond
Bell James J.
E. I. Du Pont de Nemours and Company
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