Abstract:
A fire resistant rope and method of making the same. The fire resistant rope comprises a core formed of high tensile strength fibers and a jacket formed of high temperature resistant fibers, where the jacket covers the core. The core comprises a plurality of strands, where each strand comprises a plurality of yarns and each yarn comprises a plurality of high tensile strength fibers. The jacket comprises a plurality of strands, where each strand comprises a plurality of yarns and each yarn comprises a plurality of high temperature resistant fibers. Optionally, a fire retardant material may be applied to the rope.
Abstract:
A steel cord is formed by compactly twisting steel filaments together, the steel filaments including a plurality of zigzag filaments and optionally a nonzigzag filament, the zigzag filament being zigzaged two-dimensionally and made up of straight segments each extending between the zigzag peak points, the nonzigzag filament being straight. In case the cord is composed of only the zigzag filaments, the zigzag filaments include at least two kinds of zigzag filaments having different zigzag pitch lengths. In case the cord is composed of both the zigzag filaments and nonzigzag filaments, some of the zigzag and nonzigzag filaments are first loosely twisted together into a bunch, and then a plurality of bunches are twisted together into the cord. In any case, the zigzag pitch length and zigzag wave height of each zigzag filament are substantially constant along the length thereof. A Tire comprises a reinforcing layer such as a tread reinforcing belt layer, carcass, bead reinforcing layer and the like made of the above-mentioned steel cords.
Abstract:
A pneumatic tire comprises a tread reinforcing belt made of metallic cords, each of the metallic cords is made up of six to twelve metallic filaments whose diameter is not less than 0.15 mm but less than 0.25 mm, the six to twelve metallic filaments are grouped into a plurality of bunches each including two to four filaments, the filaments of each bunch are twisted together at a first twisting pitch, the bunches are twisted together into the cord at a final twist pitch Pc of from 10 to 40 mm, the first twisting pitch is more than the final twist pitch, and the bunches each include at least one waved filament which is two-dimensionally waved at wave pitches Pw in a range of from 5 to 30 times the diameter (d) of the filament and a wave height (h) in a range of from 0.2 to 3.0 times the diameter (d).
Abstract:
An extruded polymeric rod is elongated in the solid state by being drawn through a forming device to produce a solid polymeric core having an orientated structure which comprises elongated crystals orientated in the axial direction of the core. The core may also comprise crystals orientated in respective radial directions. The single rod may be replaced by a bundle of rods.
Abstract:
A high-strength, low weight, electromechanical cable is manufactured from aromatic polyamide multifilament yarns impregnated with a hydrolytically stable polyurethane resin to form a protective coating. The coating provides load adjustment from fiber to fiber, eliminates abrasive self-destruction of the fibers during flexing of the yarn under load, protects the fiber to some extent from ultraviolet radiation, aggressive chemicals or abrasive particles and makes it possible to preform the yarn. The coating comprises a reaction product of a liquid tetramethylene glycol, an aliphatic/cycloaliphatic diisocyanate and a diamine coupling-curing agent. The impregnated yarns are dried, twisted together, heated above the softening point of the resin to fuse the coatings of adjacent yarns, and then cooled to form a set twisted helix of the yarns.
Abstract:
Provided are a high-strength fiber composite and an applied product thereof, whereby it is possible for the inherent tensile strength of high-strength fiber yarns to be obtained, even when used in applications in which bending stress occurs, such as wires, or when stored while wound around a drum or the like. This high-strength fiver composite has a core produced by imparting twist to a high-strength fiver bundle produced by bundling high-strength fiber yarns, and a stiffening the twisted high-strength fiber bundle with a stiffening agent. In this high-strength fiber composite, the high-strength fiber yarns are resistant to breakage even when flexed, have a superior shearing strength, and can maintain the inherent tensile strength of high-strength fibers, even when used in applications in which bending stress occurs, such as wires, or when stored while wound onto a drum or the like. The strand structure, which has a strand construction composed of two or more of the high-strength fiber composites twisted together, maintains the inherent strength of the high-strength fibers, and affords more consistent tensile strength, as compared with when an equal number of high-strength fiber composites lacking the strand construction are used.
Abstract:
Verfahren zum Herstellen einer Rundschlinge (80) aus Textilfasern, mit den Schritten: Anordnen eines endlosen Anfangsstrangs, der entlang einer Längsachse (16) eine vorgegebene Umfangslänge besitzt, entlang eines ringförmig geschlossenen Umlaufwegs, wobei der Anfangsstrang mit einem ersten Ende eines Wickelstrangs (81) verbunden ist, umlaufendes Bewegen des Anfangsstrangs in einer Arbeitsrichtung entlang seiner Längsachse (16) und des Umlaufwegs, und gleichzeitiges Drehen des Anfangsstrangs in einer vorbestimmten Drehrichtung um seine Längsachse (16) durch eine Abwälzbewegung an einem Umlenkmittel (2, 10, 30, 50), kontinuierliches Zuführen des Wickelstrangs (81) an einem ortsfesten Zuführungspunkt des Umlaufwegs, wobei der Wickelstrang (81) schraubenlinienförmig auf den sich drehenden und vorwärtsbewegenden Anfangsstrang aufgewickelt und ein mit jedem Umlauf des Anfangsstrangs um eine Windung des Wickelstrangs (81) wachsender Schlingenstrang (14) gebildet wird, bis ein Schlingenstrang (14) mit einer vorgegebenen Anzahl von schraubenlinienförmig um die Längsachse (16) gewickelten Windungen erreicht ist, und Sichern eines zweiten Endes (82) des Wickelstrangs (81) an dem Schlingenstrang (14), wodurch eine Rundschlinge (80) gebildet wird. Verschiedene Vorrichtungen zur Ausführung des Verfahrens mit Umlenkmitteln (2, 10, 30, 50) werden ebenfalls offenbart.