Abstract:
A metal cord is rubberized in situ by a rubber composition that includes a styrene-butadiene copolymer. The styrene-butadiene copolymer includes styrene units at a proportion of between 25% and 35% by weight, limits included, of a total weight of the styrene-butadiene copolymer. The styrene-butadiene copolymer also includes trans-1,4-bonds at a proportion of between 73% and 83% by weight, limits included, of a total weight of a butadiene part of the styrene-butadiene copolymer.
Abstract:
A tire for a vehicle wheel includes at least one metallic reinforcing cord comprising a single strand of elementary filaments preformed by sinusoidal waving and wound together. The number of filaments is greater than or equal to 3 and less than or equal to 8. A diameter of each filament is greater than or equal to 0.12 mm and less than or equal to 0.35 mm. A linear density of the at least one reinforcing cord is greater than or equal to 0.18 g/m and less than or equal to 4.0 g/m. A value of a breaking-stress integral of the at least one reinforcing cord is greater than or equal to 5,000 J/m3. In a two-wheeled vehicle, the at least one reinforcing cord in a tire for front-mounting may be distributed with a variable density while, in a tire for rear-mounting, the density may be constant.
Abstract translation:用于车轮的轮胎包括至少一个金属加强帘线,其包括通过正弦挥动预先形成并缠绕在一起的单股基本丝。 长丝的数量大于或等于3并且小于或等于8.每根细丝的直径大于或等于0.12mm且小于或等于0.35mm。 至少一个增强帘线的线密度大于或等于0.18g / m且小于或等于4.0g / m 2。 所述至少一个加强帘线的断裂应力积分的值大于或等于5,000J / m 3。 在两轮车辆中,用于前部安装的轮胎中的至少一个加强帘线可以以可变密度分布,而在用于后部安装的轮胎中,密度可以是恒定的。
Abstract:
The present invention concerns hybrid layered cables some of which can be used to reinforce at least one crown protection ply of tyres for heavy vehicles or earthmovers, and others to reinforce the beads of tyres for light motorised vehicles such as motorcycles. The invention also concerns a composite fabric usable as a crown protection ply of such heavy vehicles or earthmovers, and a bead wire designed to reinforce the said beads and the aforesaid tyres. A hybrid layered cable (C) according to the invention comprises a non-metallic internal layer (Ci) and an unsaturated external layer (Ce) comprising strands (T) each of which is at least in part metallic and which are wound in helix around the said internal layer, the said cable having a relative elongation at break At, measured in tension in accordance with the standard ISO 6892 of 1984, which is higher than 7%. According to another aspect of the invention, the said internal layer is composed of at least one material having a relative elongation at break Ar at 20° C. in excess of 6%.
Abstract:
A first aspect of the present invention relates to a filament (11; 12), especially for reinforcing rubber articles. Said filament (11; 12) features a contact surface (14) and an outer surface (13). In a second aspect, the invention relates to a steel cord (10) comprising two of said filaments (11, 12), the contact surfaces (14) are arranged adjacent to each other. The outer surfaces (13) are configured arcuate shaped and provide a smooth outer contour (15) of the steel cord (10). Due to said construction the largest dimension (d) of the steel cord (10) and the thickness of a rubber coating (18) may be considerably reduced. Additionally the invention relates to a method of producing a steel cord (10) and to a tyre (20) comprising a carcass ply (22) and/or at least one belt (25; 26) including said steel cords (10).
Abstract:
A wire rope for a heavy-load crane, such as a ladle crane is provided that is not only almost rotation-resistant but is also unlikely to be broken by wear and fatigue of wires. The rotation-resisting wire rope has a plurality of side strands. In side each strand, wires are laid in the same direction as the lay of core strand wires, around the periphery of a core strand. The side strands are laid in a direction opposite to the lay of the core strand wires so as to form the wire rope. The side strands preferably have a smaller pitch multiple than a pitch multiple of the wire rope. The ratio between a diameter of the side strands and a diameter of the core strand is preferably about 1.3 to about 1.8. The pitch multiple of strands is preferably about 5 to about 8 and the pitch multiple of the wire rope is preferably about 8 to about 10. Both the core strand and the side strands preferably have shaped wires, having a flattened surface, at an outermost ply.
Abstract:
A hauling cord (L) for pulling an electric power line or the like cable into a conduit has an elongate linear body (1) that is typically a monofilament of a thermoplastic resin. The cord is of a regular or irregular cross section with one or more helical ridges (2) that extend around, along and integral with the linear body between opposite ends of the linear body. The helical ridges are formed by drawing and twisting a raw material of the linear body, and may have either of or both the opposite ends made thinner and/or twisted stronger than the remaining portion so that the pitch between the adjacent ridges is reduced. The cross section renders the cord lighter in weight and more slender, and nevertheless its compression strength and tensile strength are improved.
Abstract:
A ribbed flexible member for casting into an anchorage medium includes a central strand with outer wires extending helically about the strand. Parts of the exposed surfaces of some of the outer wires are indented in a non-axial direction, those parts being distributed along the strand.
Abstract:
A new multi-strand orthodontic arch wire comprises a plurality of wire strands of superelastic shape recovery metal alloy wrapped helically parallel to one another along the length of the wire, the ratio of the longitudinal pitch P of the wire to the external diameter D of the wire being between six and twelve. Such a wire is able to slide more freely in the bracket slots, and is less likely to breakage, than the short pitch wires previously used. A wire with a hollow central core, can also operate as a compression spring by frictionally engaging it with adjacent orthodontic elements, such as brackets, and arranging that its strands are spread radially apart from a neutral configuration, or it can operate as a traction spring by arranging that its strands are closed radially inward from a neutral configuration, the spring action being produced by the urge of the strands to return to the neutral configuration. Cored wires can act as a compression spring, but not as a traction spring. Partial cores strands can be provided to localize the spring action to specific parts of the wire. The wires can be provided with crimpable end members. The shape recovery metal alloy can be any one of nickel/titanium; nickel/titanium/copper; copper/zinc/aluminum; copper/zinc/aluminum/manganese; copper/aluminum/nickel; and copper/aluminum/nickel/manganese.
Abstract:
A multi-strand nylon rope having improved abrasion resistance is comprised of a plurality of strands. Each strand is comprised of a plurality of yarns wherein each yarn is formed of a predetermined number of filaments. The filaments of each yarn are twisted together to form a yarn of a predetermined size, the twist direction being opposite that of the final ply yarn direction. For a right lay rope a sufficient number of filaments are twisted together in the left or "S" direction to produce a yarn of a predetermined size. Three or more yarns prepared in this manner are then plied or twisted together in the opposite or right direction. The cover for each strand is formed of alternate yarns of standard (i.e. round) and oblong filaments, respectively, the oblong filaments having a modification ratio of three, forming a rope having increased abrasion resistance, a hand and feel that is not stiff or unmanageable and which resists strand-to-strand wet abrasion.
Abstract:
The metal core used for reinforcing tire beads is constituted by a plurality of coils of wire (16), (17), (18), axially arranged side-by-side and radially superimposed, in which the wire has a cross section of modular shape with two equal and parallel opposite sides (1), (2), the profiles (15) of the corresponding ends of the opposite sides having a distance, from the axis of said pair of sides, whose value varies from one side to the other, said variation comprising at least one symmetrical deviation along, the development of its cross sectional profile.