In one aspect, the disclosure relates to cooling films comprising a substrate and one or more cooling materials deposited on the substrate. The disclosed cooling films can be used to prepare the disclosed cooling masterbatch materials. The disclosed cooling masterbatch materials can be used to prepare disclosed cooling yarns. The one or more cooling materials deposited on the substrate of a disclosed cooling film, dispersed in a disclosed cooling masterbatch material, or in disclosed cooling yarn are nano-sized particles. In still further aspects, the present disclosure pertains to a fabric comprising a disclosed cooling yarn. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

In one aspect, the disclosure relates to cooling films comprising a substrate and one or more cooling materials deposited on the substrate. The disclosed cooling films can be used to prepare the disclosed cooling masterbatch materials. The disclosed cooling masterbatch materials can be used to prepare disclosed cooling yarns. The one or more cooling materials deposited on the substrate of a disclosed cooling film, dispersed in a disclosed cooling masterbatch material, or in disclosed cooling yarn are nano-sized particles. In still further aspects, the present disclosure pertains to a fabric comprising a disclosed cooling yarn. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

A system and method for providing a plurality of fibers from a spinneret; subjecting the fibers to quench air; attenuating the fibers through a closed stretching unit; reducing a velocity of the plurality of fibers in a diffuser that is spaced apart from an exit of the closed stretching unit in a direction of travel of the fibers, the diffuser having opposed diverging sidewalls; and subjecting the fibers to an applied electrostatic charge before the fibers enter the diffuser, wherein the electrostatic charge is applied by one or more electrostatic charging units.

An extrusion apparatus suitable for manufacturing artificial turf polymer fiber, in particular from LLDPE that is free of fiber splitting, wherein the extrusion apparatus is characterized in that a ratio of an equivalent diameter of the nozzle outlet over an axial length of the inner channel of the nozzle is from 0.90 to 1.10, or from 0.95 to 1.05.

A method of making nonwoven webs comprising providing a spinneret including a pattern of conduits forming an extrusion region; directing only a first stream of molten propylene polymer into a region adjacent the first side of the spinneret, directing only a second stream of molten propylene polymer into a region distal to the first side of the spinneret, extruding only the first stream propylene polymer through the exit openings in a first zone where the exit opening comprises exit ports in the first zone having a first density; extruding only the second stream propylene polymer through the exit openings of a second zone where the exit opening comprises exit ports in the second zone having a second density less than the first density; and the second zone is distal to the first side with the first zone being between the second zone and the first side.

A method of making nonwoven webs comprising providing a spinneret including a pattern of conduits forming an extrusion region; directing only a first stream of molten propylene polymer into a region adjacent the first side of the spinneret, directing only a second stream of molten propylene polymer into a region distal to the first side of the spinneret, extruding only the first stream propylene polymer through the exit openings in a first zone where the exit opening comprises exit ports in the first zone having a first density; extruding only the second stream propylene polymer through the exit openings of a second zone where the exit opening comprises exit ports in the second zone having a second density less than the first density; and the second zone is distal to the first side with the first zone being between the second zone and the first side.

The present disclosure relates to a method of manufacturing a high-strength sheath-core type synthetic fiber and high-strength sheath-core type synthetic fiber manufactured thereby, the method including forming a fiber by melt-spinning a thermoplastic polymer of a sheath component and a core component through a spinning pack including a sheath-core type bicomponent spinning nozzle; performing a heat treatment by allowing a molten fiber to pass through a heating zone disposed directly below the spinning nozzle during the melt-spinning; cooling the heat-treated fiber; and drawing the cooled fiber, wherein the sheath component includes a resin including the sheath component having elongation viscosity and thermal conductivity lower and specific heat higher than those of a resin included in the core component, and an ultra-fine high-strength synthetic fiber satisfying predetermined strength or higher as compared to a fine diameter and intrinsic viscosity may be provided.

The present disclosure relates to a method of manufacturing a high-strength sheath-core type synthetic fiber and high-strength sheath-core type synthetic fiber manufactured thereby, the method including forming a fiber by melt-spinning a thermoplastic polymer of a sheath component and a core component through a spinning pack including a sheath-core type bicomponent spinning nozzle; performing a heat treatment by allowing a molten fiber to pass through a heating zone disposed directly below the spinning nozzle during the melt-spinning; cooling the heat-treated fiber; and drawing the cooled fiber, wherein the sheath component includes a resin including the sheath component having elongation viscosity and thermal conductivity lower and specific heat higher than those of a resin included in the core component, and an ultra-fine high-strength synthetic fiber satisfying predetermined strength or higher as compared to a fine diameter and intrinsic viscosity may be provided.

The present application provides a preparation method of an all-polymer aerogel composite fiber by compounding fiber material(s) with polymer-based micro-aerogel powder using a melting process, comprising of the following steps: (a) Weighing the materials to form the aerogel composite fibers, which should compose of 0.1-20% (w/w) polymer micro-aerogel powder and 80-99.9% (w/w) fiber material(s); (a) Mixing the polymer micro-aerogel powder and fiber material(s) to form a homogenized composite mixture; and (b) Heating the composite mixture up to the melting point of the fiber material(s) to disperse the polymer micro-aerogels throughout the molten fiber material(s), then extruded to form aerogel composite fibers.

The present application provides a preparation method of an all-polymer aerogel composite fiber by compounding fiber material(s) with polymer-based micro-aerogel powder using a melting process, comprising of the following steps: (a) Weighing the materials to form the aerogel composite fibers, which should compose of 0.1-20% (w/w) polymer micro-aerogel powder and 80-99.9% (w/w) fiber material(s); (a) Mixing the polymer micro-aerogel powder and fiber material(s) to form a homogenized composite mixture; and (b) Heating the composite mixture up to the melting point of the fiber material(s) to disperse the polymer micro-aerogels throughout the molten fiber material(s), then extruded to form aerogel composite fibers.