A pneumatic commercial vehicle tire of radial design includes at least a three-ply belt, of which two belt plies are working plies and one radially outermost belt ply is a cover ply. Each of these belt plies includes reinforcements which are made of steel cord and which are embedded in elastomer. The steel cords of each of the three belt plies are coated with brass so as to provide for good elastomer adhesion. The brass coating of the reinforcement supports of the two working plies has a copper proportion of 60 wt. % to 65 wt. % and the brass coating of the reinforcement supports of the cover ply has a copper proportion of 66 wt. % to 70 wt. %.

A steel cord is obtained by bundling five steel core wires, which are arrayed in parallel with one another in a plane, into a unitary body by means of an adhesive having a thickness Ad of less than 15 m. Each of the core wires-constituting the steel cord has a diameter d of less than 0.45 mm, and spacing Gd between the core wires is less than 20 m. The core wires used have a free coil diameter D that is greater than wire diameter d thereof by 750 times or more.

A metallic strength member rubberized with a sulfur-crosslinkable, essentially cobalt-free rubberization mixture, wherein the metallic strength member is a steel cord containing one or more filaments, wherein the filaments include a steel substrate filament and a coating that partly or completely covers the steel substrate filament, wherein the coating includes brass consisting of copper and zinc, and wherein the coating is enriched with iron in the form of particles having a size between 10 and 10 000 nm in the brass. In order to optimize vulcanization times, the rubberization mixture contains 0.5 to 3 phr of at least one sulfenimide accelerator and/or at least one dibenzylamine-based sulfenamide accelerator.

A tyre includes a carcass structure including at least one carcass ply, a belt structure applied in a radially outer position with respect to the carcass structure, and a tread band applied in a radially outer position with respect to the belt structure. The belt structure includes two main belt layers and first and second reinforcing strips incorporating a plurality of reinforcing elements arranged substantially in the circumferential direction. The reinforcing elements include at least one high-elongation metal cord including a plurality of intertwined strands, and each strand includes a plurality of filaments. Each filament has a diameter not greater than 0.175 mm.

A ready-for-use metal reinforcer, for example, of the wire or cord type, made of brass-coated carbon steel, is capable of adhering directly by vulcanization to a matrix of unsaturated rubber such as natural rubber. The surface of the reinforcer is provided with nanoparticles of at least one sulfide of a metal chosen from cobalt, copper, iron, zinc and the alloys comprising at least one of these elements. Such a reinforcer can be used as the reinforcing element of a finished article made of rubber, such as a tire.

The steel reinforcing element is coated with an adhesive layer coating at least a portion of the reinforcing element. The adhesive layer comprises an adhesive composition comprising: at least one unsaturated elastomer latex, and at least one phenol/aldehyde resin based on at least one aromatic aldehyde and one polyphenol comprising one or more aromatic nucleus/nuclei.

The rubber composite comprises a steel reinforcing element coated with an adhesive layer coating at least a portion of the reinforcing element. The adhesive layer comprises an adhesive composition comprising at least one phenol/aldehyde resin based on at least: one aromatic aldehyde and one polyphenol comprising one or more aromatic nucleus/nuclei. The coated steel reinforcing element is embedded in a rubber matrix based on a rubber composition comprising a crosslinking system comprising a content of molecular sulphur ranging from 1 to 5 phr.

The coated steel reinforcing element comprises one or more threadlike reinforcing elements, each comprising a steel core, and an adhesive layer coating at least a portion of the steel core of the or each threadlike reinforcing element. The coated steel reinforcing element is devoid of a metal layer between the steel core of the or each threadlike reinforcing element and the adhesive layer. The adhesive layer comprises an adhesive composition comprising at least one phenol/aldehyde resin based on at least: one aromatic aldehyde and one polyphenol comprising one or more aromatic nucleus/nuclei.

A steel reinforcing element comprises: one or more threadlike reinforcing elements each comprising a steel core; a layer of a coating of a copper-tin alloy coating at least a portion of the steel core of the or each threadlike reinforcing element; and an adhesive layer coating at least a portion of the layer of the coating of copper-tin alloy of the or each threadlike reinforcing element. The adhesive layer comprises an adhesive composition comprising at least one phenol/aldehyde resin based on at least: one aromatic aldehyde and one polyphenol comprising one or more aromatic nucleus/nuclei.

A threadlike metallic or metallized reinforcer, for example a thread, film, tape or cord made of carbon steel, at the periphery of which is positioned a layer of metal referred to as surface metal chosen from copper, nickel and copper/nickel alloys, is characterized in that this surface metal layer is itself coated, at least in part, with at least one layer of graphene; preferably, there is grafted, to this graphene, at least one functional group which can crosslink to a polymer matrix. This reinforcer of the invention is effectively protected from corrosion by virtue of the graphene present at the surface; advantageously, it can be adhesively bonded directly, without adhesion primer or addition of metal salt, to an unsaturated rubber matrix, such as natural rubber, by virtue of the possible functionalization of this graphene.