Abstract:
A steel cord for use as reinforcing materials for rubber products, especially automobile tires. For improving rubber penetrativity and break-resistance, three to six material wires are intertwisted into a steel cord having a cross section of elliptical shape of with adjoining material wires substantially contacting with each other at the area of both ends of the ellipse and separating from each other at the other area. Where necessary, a high elongation of more than 5% is imparted by intertwisting material wires at
Abstract:
A cord with an elongated cross-section and adapted for the reinforcement of plies in a pneumatic tire, comprises a layer of steel filaments that are wound around an untwisted monofilament core, the monofilament core having a tensile strength of at least 1800 N/mm², an elongation at rupture of at least 2 per cent and a breadth-to-thickness ratio of at least 2. This structure combines the properties of flat wires with those of steel cords having substantially round cross-sections.
Abstract:
Le procédé de fabrication d'un conducteur neutre porteur pour faisceau de conducteurs électriques ayant une âme métal lique (2) constituée de fils métalliques (3) formés en toron, comprend au moins un tréfilage terminal sans lubrifiant de ces fils métalliques (3) en vue d'obtenir des fils dépourvus de trace de lubrifiant pour constituer l'âme (2) - une pose d'un ruban non endu en matière non collant, sur cette âme (2) pour consti tuer un revêtement séparateur (4) et une extrusion sous forte pression d'un matériau isolant sur ce revêtement séparateur (4) pour constituer une gaine extérieure qui pénètre avec ce re vêtement séparateur dans les inégalités de surface de cette âme (2). Le procédé peut comprendre en outre une ovalisation de la section transversale de l'âme (2) et/ou une pose d'un élé ment antiglissant entre cette âme (2) et le revêtement sépara teur (4).
Abstract:
To provide a pneumatic tire wherein the lightweight properties of a tire is secured while improving the plunger energy and BES resistance thereof, which is particularly suitable for tires for a large passenger car or extra load tires. A pneumatic tire comprising a carcass 1 as a skeleton, and at least two belt layers 2a, 2b each formed by rubberizing a plurality of steel cords arranged obliquely with respect to the tire circumferential direction on the outside in the tire radial direction of the crown portion of the carcass is provided. The steel cord is composed of two or more core wires and five to seven sheath wires twisted together around the core wires; the interval between adjacent steel cords in the belt layer is more than 1.0 mm and not more than 1.50 mm; and the gauge of the belt layer is not less than 1.20 mm and not more than 1.60 mm.
Abstract:
Disclosed is a tire-reinforcing steel cord for a radial tire. The tire-reinforcing steel cord has a double layer structure including a first-layer core (1) and a second-layer core (2) provided on the surface of the first-layer core (1). The first-layer core (1) has an elliptical or rectangular cross section. The tire-reinforcing steel cord can improve processability, fatigue characteristics, and rolling resistance performance of a tire, resulting in improved fuel efficiency. A radial tire using the tire-reinforcing steel cord is also disclosed.
Abstract:
A composite hybrid cord comprising a core comprising of a first bundle of synthetic filaments having a filament tenacity of from 10 to 40 grams per decitex and a plurality of cabled strands helically wound around the core, each cabled strand comprising of a plurality of metal strands helically wound around a center second bundle of synthetic filaments that have a filament tenacity of from 10 to 40 grams per decitex. The ratio of the largest cross sectional dimension of the first bundle of synthetic filaments to the largest cross sectional dimension of the second bundle of synthetic filaments is from 1.5:1 to 20:1. The metallic filaments of the cabled strands have an elongation at break that is no more than 24 percent different from the elongation at break of the synthetic filaments of the first and second bundles.