Abstract: An undrawn yarn is produced at increased quench delay and increased take-up speed to achieve improved ultimate elongation at a given crystallinity. Particularly preferred aspects include products comprising such yarns and methods for producing same.

Abstract: A composite textile article for garments which are useful as a barrier for chemical and biological contaminants, such as nerve gas and infectious microorganisms from a surrounding atmosphere. The composite textile article has a sheet of a water vapor permeable central textile fabric composed of polymeric multilobal fibers, having a central core and T-shaped lobes projecting therefrom, and which sheet of central textile fabric has been impregnated with at least one biological and/or chemical decontamination reagent in an amount sufficient to chemically modify, neutralize and/or decontaminate chemical and/or biological contaminants. A pair of sheets of outer textile fabrics, are positioned on the front and rear sides of the central textile fabric. The sheet of central textile fabric and the pair of sheets of outer textile fabrics are attached together via a sealed hem around their perimeter such that it prevents the at least one biological and/or chemical decontamination reagent from passing through the hem.

Abstract: A product comprises a dimensionally stable polymeric multifilament yarn having a decitex per fiber count DPF of at least 7.5 and a fatigue strength retention FR, wherein preferred yarns are spun and drawn such that FR increases when DPF increases. Particularly preferred yarns are fabricated from poly(ethylene terephthalate) and have a DPF of between 10 and 20.

Abstract: An undrawn yarn is produced at increased quench delay and increased take-up speed to achieve improved ultimate elongation at a given crystallinity. Particularly preferred aspects include products comprising such yarns and methods for producing same.

Abstract: A spun polyester fiber, a drawn polyester yarn, and methods for making them. Polyethylene terephthalate yarn is prepared by extruding a molten melt-spinnable polyethylene terephthalate having an intrinsic viscosity of at least about 0.8 through a shaped extrusion orifice having a plurality of openings to form a molten spun yarn; solidifying gradually said molten spun yarn by passing said molten spun yarn through a solidification zone which comprises (i) a retarded cooling zone and (ii) a cooling zone adjacent said retarded cooling zone where, in said cooling zone, said yarn is rapidly cooled and solidified in a gaseous atmosphere; withdrawing at sufficient speed said solidified yarn from said solidification zone to form a crystalline partially oriented yarn; and hot drawing said crystalline partially oriented yarn at a total draw ratio between about 1.5/1 and about 2.5/1 to produce a drawn yarn having an effective crosslink density (N) between about 10×1021 and about 20×1021 crosslinks per cubic centimeter.