Abstract:
A steel cord comprises more than one steel filament (10). At least some of the steel filaments have a zinc iron alloy layer (14) partially covered with a zinc cover (16). The zinc cover is only present in valleys formed in the zinc-iron alloy layer. The processability and adhesion level in rubber products of the stell cord are increased.
Abstract:
A method for manufacturing a bead cord wire includes the steps of subjecting a steel wire to a descaling treatment, subjecting the descaling-treated steel wire to a chemical conversion coating treatment through electrolysis so as to form a phosphate coating on a surface of the steel wire, and subjecting the chemical-conversion-coating-treated steel wire to drawing so as to produce a bead cord wire. In producing the bead cord wire, the drawing is conducted in such a way that the phosphate coating remains on the surface of the bead cord wire.
Abstract:
A rubber-cord complex 9 having an improved wet heat adhesive property between a rubber and a cord comprising a drawn plated wire, and including a cord 10 comprising a drawn plated wire 17 prepared by providing a brass plated layer 16E on the surface of an element wire 15 and drawing the resulting plated wire, and a rubber 12 vulcanized and bonded to the cord 10, wherein the rubber-cord complex 9 has an adhesion reaction layer 25 formed by a cross-linking reaction of sulfur and copper, between the rubber 12 and the brass plated layer 16E, and in a wet heat deterioration state after being subjected to the vulcanization to bond the rubber 12 thereto and further held under an atmosphere having a temperature of 50 to 100° C. and a humidity of 60 to 100% for one hour to 20 days, the adhesion reaction layer 25 has an average thickness of 50 to 1,000 nm, and the interface S between the adhesion reaction layer 25 and the rubber has a fractal dimension of 1.001 to 1.300.
Abstract:
A metallic body of carbon steel covered with an adhesive layer capable of adhering to a rubber matrix based on diene elastomer. The carbon content of the steel is between 0.35 and 1.2% by weight. The adhesive layer is formed of a metallic layer bearing aluminum oxides or hydroxides, which itself is covered with an organosilane film which is at least bifunctional, capable of ensuring, as coupling agent, the bond between the aluminum oxides or hydroxides on one hand, and the rubber matrix on the other hand.
Abstract:
Electric cables used with wellbore devices to analyze geologic formations adjacent a wellbore including at least one insulated conductor, and one or more armor wires surrounding the insulated conductor, the armor wires formed of a high strength core surrounded by a corrosion resistant alloy clad. The alloy clad includes such alloys as beryllium-copper based alloys, nickel-chromium based alloys, superaustenitic stainless steel alloys, nickel-cobalt based alloys, nickel-molybdenum-chromium based alloys, and the like. The cables of the invention may be any useful electric cable, including monocables, quadcables, heptacables, quadcables, slickline cables, multiline cables, coaxial cables, or seismic cables.
Abstract:
A steel cord for the reinforcement of thermoplastic elastomers, the steel cord including more than one strand, each strand including two or more steel filaments, at least some of said the steel filaments being provided with a zinc coating. The zinc coating has a thickness lower than two micrometer and an alloy layer zinc-steel is present between the zinc coating and the steel.
Abstract:
A steel cord (10) comprises a core with one or more core steel filaments (12) and further comprises a first layer of intermediate steel filaments (14) twisted around the core, and a second layer of second steel filaments (18) twisted around the first layer. At least one of the intermediate steel filaments is individually coated by means of a polymer (16) with a minimum thickness of 0.010 mm. The polymer (16) reduces the fretting between the coated intermediate steel filaments (14) and the other steel filaments and makes the steel cord suitable for reinforcement of carcass plies of a tire.
Abstract:
A method for making a metallic cord made up of one or more metallic wires comprises: making at least two layers of at least two metallic elements including copper and zinc on the surface of a base wire; heating the layers to cause the metallic elements thermodiffusion to transform into a primary alloy layer; making a layer of copper on the primary alloy layer; drawing the wire provided with the primary alloy layer and outer copper layer into a metallic wire through dies so that the outer copper layer is diminished during passing through the dies, and a secondary alloy layer is formed as a result of transformation of the primary alloy layer and the outer copper layer which is caused by frictional heat during passing through the dies.
Abstract:
In a composite of vulcanizable rubber or rubber-like composition with one or more metal reinforcement elements embedded therein, the metal reinforcement element is coated with a polymer or non-cured rubber composition compatible with and co-polymerizable, co-vulcanizable or crosslinkable with said vulcanizable ruber composition to be reinforced, and additionally bearing functional groups either covalently bonding to the metal surface of said reinforcement element or forming covalent bonds with the outward directed first functional groups of a mono- or multimolecular layer of a bifunctional adhesion promoter intercalated between said metal and said coating and bound to said metal by its second functional groups. A cured rubber or rubber-like product, for instance a pneumatic tire, is obtained by vulcanization of such a composite.
Abstract:
The invention relates to a substrate for reinforcing elastomeric polymers whereby at least part of the substrate is made of steel, said part being covered by a layer of an alloy consisting of, apart from impurities, between 4.2 and 6.5% weight of aluminum, possibly less than 0.1% of at least one element stimulating the wetting ability of the liquid alloy to the substrate and the balance zinc.