Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1995-06-07
1997-02-18
Edwards, Newton
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428397, 428398, D02G 300
Patent
active
056040369
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.
REFERENCES:
patent: 3728428 (1971-06-01), Turner
patent: 3745061 (1971-07-01), Champaneria et al.
patent: 3924988 (1972-05-01), Hodge
patent: 4444710 (1982-02-01), Most, Jr.
patent: 4548866 (1983-10-01), Cordova et al.
patent: 4770938 (1988-09-01), Peterson et al.
patent: 4992332 (1991-02-01), Kamei et al.
patent: 5104725 (1992-04-01), Broaddus
patent: 5322736 (1994-06-01), Boyle et al.
patent: 5356582 (1994-10-01), Aneja et al.
patent: 5419964 (1995-05-01), Boles, Jr. et al.
patent: 5458971 (1995-10-01), Hernandez et al.
Translation of Japan 59-49,328 (Published Dec. 1, 1984).
Bennett James P.
Knox Benjamin H.
Price David A.
Schafluetzel Dennis R.
E. I. Du Pont de Nemours and Company
Edwards Newton
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