Fiber Industries, Inc.

Celanese Gmbh

John R Dees

Wayne T Mowe

Lawrence E Blackmon

James E Bromley

Jing-peir Yu

Harold M Familant

Darrell A Kelly

Darwyn E Walker

Polyester polymer is extruded through converging capillaries at different speeds to merge and form a combined stream. The stream is cooled to form a filament, which is withdrawn at a high speed. A plurality of such filaments are combined into yarn which self-crimps upon heating. In some embodiments, the yarn has a variable denier.

Self-crimping yarn

Molten polymer streams are separately metered to the individual capillaries of a combined orifice, rendering the yarn produced less dependent on the capillary dimensions.

Desensitized spinneret

Two molten streams of polyester polymer are extruded at different speeds to intersect below the spinneret. The spinning speed is relatively high, and the resulting filament has shrinkage peaks and valleys along its length. When a number of such filaments are relaxed in a yarn bundle, the yarn spontaneously develops crimp.

Self crimping yarn and process

A yarn having variable denier filaments with thick and thin regions is drawn at a draw ratio selected to break filaments in the thin regions. This may be done while false-twist texturing. The resulting broken ends protrude from the yarn, giving a spun-like yarn.

Process for making spun-like yarn with variable denier filaments

Spinning process with a desensitized spinneret design

A spinneret has a number of combined orifices having different nominal dimensions. Yarns spun from such spinnerets have less doff-to-doff average standard deviation of yarn bulk.

Melt spinning process

A yarn for producing fabrics with a wool-like hand, by combining textured filaments with longer filaments preferably of larger average denier. The longer filaments thus protrude in loops from the yarn bundle.

Continuous filament yarn with wool-like hand

A yarn for producing fabrics with a wool-like hand, by combining textured filaments with longer filaments preferably of larger average denier. The longer filaments thus protrude in loops from the yarn bundle, and have helical cross-sections.

Method for producing polyester wool-like yarn

Process for continuous filament yarn with wool-like hand

A yarn for producing fabrics with a wool-like hand, by combining textured filaments with longer filaments preferably of larger average denier. The longer filaments thus protrude in loops from the yarn bundle, and have spiral cross-sections.

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Pensacola, FL, United States of America

John R Dees