Hercules Corporation

Fiberco, Inc.

Kunihiko Takeuchi

Rakesh K Gupta

James E Mallory

Shiv Sibal

Walter J Freeman

Richard J Coffin

Walter R Curfman

Donald J Pederson

Clayton E Torrence

Dwayne S Weaver

Michael P Hegwood

Spinnerette including a plate including a plurality of capillaries which have capillary ends with dividers which divide each capillary end into a plurality of openings, and a process of making polymeric fiber. The process includes passing a molten polymer through a spinnerette comprising a plurality of capillaries which have capillary ends with dividers which divide each capillary end into a plurality of openings so that the molten polymer is formed into separate polymeric fibers for each opening or the molten polymer is formed into partially split fiber for each capillary, and quenching the molten polymer to form polymeric fiber.

Process for making polymeric fiber

Process and apparatus for spinning polymer filaments permits the obtaining of skin-core filament structure by feeding a polymer composition to a spinnerette at a flow rate sufficient to obtain a spinning speed of about 10 to 200 meters per minute through the spinnerette; heating the polymer composition at a location at or adjacent to the spinnerette so as to heat the polymer composition to a sufficient temperature to obtain a skin-core filament structure upon quenching in an oxidative atmosphere; extruding the heated polymer composition through the spinnerette at a spinning speed of about 10 to 200 meters per minute to form molten filaments; and quenching the molten filaments in an oxidative atmosphere so as to effect oxidative chain scission degradation of at least a surface of the molten filaments to obtain filaments having a skin-core structure.

Melt spin system for producing skin-core high thermal bond strength

Process and apparatus for the manufacture of polyolefin-containing fibers, preferably high-smectic content polyolefin-containing fibers, wherein a spin height of less than about 4 meters is utilized at spinning speeds of at least about 500 m/min. Further, guidance wings and/or an exhaust extensions are disclosed for various spinning systems to assist in the quenching of fibers. Fibers produced by the invention, preferably skin-core fiber, enable the production of nonwoven materials having excellent properties.

Compact long spin system

Thermobondable fiber of at least one first component of polypropylene having a melt flow rate of 0.5-30, and at least one second component of polypropylene having a melt flow rate of 60-1000.

Thermally bondable fiber for high strength non-woven fabrics

Process of making skin-core high thermal bond strength fiber

Growing community of inventors

Conyers, GA, United States of America

Kunihiko Takeuchi