A fiber bundle containing a plurality of fibers that are twisted about a longitudinal axis is provided. At least a portion of the fibers are formed from a thermoplastic composition containing a continuous phase that includes a polyolefin matrix polymer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains. A porous network is defined in the composition that includes a plurality of nanopores.

A fiber bundle containing a plurality of fibers that are twisted about a longitudinal axis is provided. At least a portion of the fibers are formed from a thermoplastic composition containing a continuous phase that includes a polyolefin matrix polymer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains. A porous network is defined in the composition that includes a plurality of nanopores.

A method for forming filaments, wherein the method uses a die assembly suitable for spinning filaments and more particularly to a die assembly having a fluid environment around the die assembly's filament exit holes is provided.

The present disclosure describes a tampon article, a composite fibrous web, and a method of making same. Such an article includes an outer carrier component including an inner surface that defines an internal void. Including an absorbent component elongate along an axis and is disposed in the internal void. The absorbent component includes an outer surface that extends about the axis and faces the inner surface. The absorbent component further includes a composite fibrous web of staple cellulosic fibers and a meltspun web of filaments entangled with the web of staple cellulosic fibers. The composite fibrous web can be in a compressed configuration in the internal void such that at least portion of the outer surface of the absorbent component is defined by the meltspun web of filaments. The tampon can include a withdrawal cord coupled to the absorbent component.

A method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye of a different color than the first dye. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

A method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye of a different color than the first dye. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

Disclosed herein are methods for producing core-sheath structures by shaping at least one filament bundle containing a plurality of filaments to form at least one shaped strand of filaments, and braiding a plurality of strands, including the at least one shaped strand of filaments, over a core to form the core-sheath structure containing a braided sheath of the strands surrounding the core, wherein the shaped strand of filaments is an untwisted strand having a twist level of less than 1 turn per meter, a cross-sectional aspect ratio of the shaped strand of filaments is at least 3:1, as measured in the braided sheath, a thickness of at least a portion of the braided sheath ranges from about 10 to about 200 μm, and the braided sheath comprises a synthetic fiber having a tensile strength of greater than 12 cN/dtex. Also disclosed herein are core-sheath structures formed by such methods.

A non-woven fabric, non-woven fabric producing method and an acoustic absorbent of desirable properties are provided. The non-woven fabric is a non-woven fabric including a plurality of ultrafine fibers configured from a thermoplastic resin, and comprises: a base portion configured by entangling of some of the plurality of ultrafine fibers; and a fiber bundle configured by entangling and bundling of other ultrafine fibers in the plurality of ultrafine fibers, and that is entangled with the base portion. The fiber bundle has a lower void fraction than a void fraction of the base portion.

An apparatus for making nonwoven has a spinning device for spinning continuous filaments and moving the spun filaments in a vertical travel direction along a vertical travel path and a mesh belt below the spinning device, traveling in a horizontal direction, and having a multiplicity of vertically throughgoing openings distributed generally uniformly over its surface and of which a portion are plugged. A cooler and a stretcher are provided along the path downstream of the spinning device and above the belt for cooling and stretching the filaments and depositing the cooled and stretched filaments at a predetermined deposition location on the belt. A blower underneath the belt at the deposition location aspirates air through the openings and thereby holds the deposited filaments down on the belt.

The present invention relates to a spinning nozzle apparatus for manufacturing a high-strength fiber. The spinning nozzle apparatus for manufacturing a high-strength fiber according to the present invention is designed to optimize a heating method for the spinning region of a spinning nozzle in the melt spinning process. The heat transfer method is optimized by disposing the spinning nozzle holes of spinning nozzle commercially available on the outside of, directly under the pack body and heating the spinning nozzle holes with a heating body. In addition, an instantaneous heat treatment at high temperature is adopted to control the molecular entanglement structure in the melted polymer, which enhances the drawability of the thermoplastic resin and hence improves the mechanical properties such as strength and elongation.