Provided are a polycarbonate fiber having a specific orientation degree and/or a specific birefringence value, a fiber structure as well as a resin composite body. The polycarbonate fiber may have an orientation degree (ft) of lower than 0.70, the orientation degree (ft) being defined by the following formula: ft=1−(1.0/C).sup.2, C: obtained sonic velocity (km/sec), and may have a birefringence value of 0.04 or lower. The polycarbonate fiber may comprise a polycarbonate resin having a number-average molecular weight (Mn) of from 12000 to 40000 and/or a weight-average molecular weight (Mw) of from 25000 to 80000.

Provided is a hollow fiber membrane that is excellent in water vapor separation performance immediately after production and water vapor separation performance after repeated use with compressed air. A hollow fiber membrane comprising a polyarylate resin, wherein the hollow fiber membrane includes a skin layer on at least one of inner and outer surfaces, has a tensile strength of 7 MPa or more and an elongation at break of 15% or more, and has an internal pressure water permeability of less than 100 L/(m.sup.2.Math.atm/h) as measured using pure water at 25° C.

A fiber is a sea-island-type composite fiber in which the primary constituent component of the sea section is an aromatic polyester, the moisture absorption/desorption parameter ΔMR is at least 2.0%, and a diagram obtained by connecting the center of gravity of the islands positioned on the outermost periphery of the fiber cross-sectional surface with line segments is a regular polygon having the center of gravity as an apex. A polyester fiber having superior quality with no splitting of the fiber surface caused by dispersion of stress generated due to volume expansion of the fibers when absorbing moisture, no dyeing irregularity or fuzzing when used in a woven or knitted fabric, and no reduction in moisture absorption due to hot-water processing.

A cooling fabric including a moisture-permeable inner surface layer, a spacer fabric and an outer surface layer, wherein the outer surface layer has an air permeability of at most 250 l/dm2/min at 500 Pa measured according to ISO 9237 and wherein the spacer fabric comprises monofilaments extending across the spacer fabric, wherein the monofilaments have a linear density of at least 250 dtex and wherein the monofilaments are present at a density of at most 800 monofilaments per square-inch.

The purpose of the present application is to provide a fiber composite for reinforcing concrete, the fiber composite providing a specific number of twists so as to have pull-out resistance in concrete, being capable of serving as a concrete reinforcement since hydrophilic compound, which can bind to concrete by hydrogen bonding, is coated on concrete and the fiber composite, maintaining the shape of fibers when mixed into concrete, reducing a rebound rate during shotcrete placing, and maintaining linearity within concrete.

A webbing for use in a fall protection device, such as a self-retracting lifeline having leading edge capabilities, is provided having a double cloth construction with the exterior of the webbing constructed of woven, UV-resistant, liquid-crystal aromatic polyester yarns and having stuffer yarns positioned in the interior of the fabric, wherein the stuffer yarns are made of high-tenacity fibers, having a melting point of 280° C. or greater. The webbing meets ANSI Standard Z359.14 for leading edge applications, and is arc-flash protective in compliance with ASTM F887.

This liquid-crystal polyester multifilament has a compression yield stress of 15-40 mN/dtex. The present invention provides a liquid-crystal polyester multifilament with which it is possible to realize much higher flexural fatigue resistance in comparison with the prior art when used in a high-level processed product.

Provided are a core-sheath composite fiber, a production method therefor, and a fiber structure. The core-sheath composite fiber includes: a core component (12) including a melt-anisotropic aromatic polyester (a polymer A); and a sheath component having an islands-in-the-sea structure and including a flexible thermoplastic polymer (a polymer B) and a melt-anisotropic aromatic polyester (a polymer C). The polymer B and the polymer C constitute a sea component and an island component of the islands-in-the-sea structure, respectively. The island component includes a plurality of islands (18) dispersed in a sea (14) that is formed of the sea component.

A protective textile sleeve for providing protection to an elongate member contained therein; a method of construction thereof, and a method of bonding at least a portion of the sleeve to at least one of itself and an elongate member extending through a cavity thereof is provided. The sleeve has a wall of interlaced yarn, with the wall having an outermost surface and an innermost surface. The innermost surface is configured to bound a cavity extending between opposite open ends. The sleeve further includes an adhesive coating bonded to at least a portion of at least one of the outermost and innermost surfaces. The adhesive coating has a first, dried non-adhesive state and a second, wetted adhesive state, wherein the second adhesive state is activated via application of a water-based liquid thereto.

The present invention addresses the problem of providing a twisted cord of liquid-crystal polyester multifilaments which gives various high-order processed products capable of retaining desired product shapes and which is suitable for use in general industrial material applications such as high-strength ropes, slings, and nets. The twisted cord of liquid-crystal polyester multifilaments has a coefficient of variation in longitudinal-direction cord diameter, X, of less than 30%.