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.

Metal or metallized reinforcer, at least the surface of which is at least partially metallic, at least said metallic part being coated with a polybenzoxazine, the repeat units of which comprise at least one unit corresponding to the formulae (I) or (II):

##STR00001##

in which: Z.sub.1 represents an at least divalent, aliphatic, cycloaliphatic or aromatic bonding group comprising at least one carbon atom and optionally at least one heteroatom selected from O, S, N and P; X.sub.1 and X.sub.2, which are identical or different, represent O or S; Ar.sub.1 and Ar.sub.2, which are identical or different, represent a substituted or unsubstituted phenylene group; Z.sub.2 represents O or (S).sub.n, the symbol n representing an integer equal to 1 or greater than 1.

Use of such a reinforcement for the reinforcement of a rubber article, in particular a motor vehicle tyre.

This disclosure is to provide a brass-plated steel wire for reinforcing a rubber article, which is capable of improving the initial adhesiveness, heat-resistant adhesiveness and initial adhesion rate. This disclosure is a brass-plated steel wire for reinforcing a rubber article, wherein: when measured with XPS (X-ray photoelectron spectroscopy), an outermost surface contains zinc at an amount of 4.8 atom % or less, phosphorus at an amount of 0.5 atom % or more, and oxygen at an amount of 50 atom % or less; and in the outermost surface, an atomic ratio of copper to zinc is 1 to 6.

A metal or metallized reinforcer, at least the surface of which is at least partially metallic, comprises at least a metallic part coated with a polybenzoxazine, the repeat units of which comprise at least one unit corresponding to the formulae (I) or (II):

##STR00001##

in which Z.sub.1 and Z.sub.2, which are identical or different, represent an at least divalent, aliphatic, cycloaliphatic or aromatic bonding group comprising at least one carbon atom and optionally at least one heteroatom selected from O, S, N and P. Such a reinforcement can be used for the reinforcement of a rubber article, in particular a motor vehicle tire.

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.

Provided are: a rubber article-reinforcing steel cord having excellent corrosion resistance; and a method of producing the same with excellent productivity. In a rubber article-reinforcing steel cord (1), plural sheath strands (3) each formed by twisting together plural steel filaments are twisted together around at least one core strand (2) formed by twisting together plural steel filaments. Brass plating is performed on the steel filaments, and zinc plating is further performed on at least the outer circumference of the brass plating of outermost-layer steel filaments of the sheath strands (3).

A tire having a rubber body in which a steel cord is embedded, wherein a layer composed of Zn.sub.xCo.sub.yO is formed at the interface between the steel cord and the rubber body and x+y is 5/6 or more and 1 or less.

A polybenzoxazine sulfide has repeating units including at least one unit corresponding to formula (I) or (II):

##STR00001##

in which the two oxazine rings are connected together via a central aromatic group, the benzene ring of which bears one, two, three or four groups of formula S.sub.xR in which x is an integer from 1 to 8 and R represents hydrogen or a hydrocarbon-based group including 1 to 10 carbon atoms and optionally a heteroatom chosen from O, S, N and P. Such a polybenzoxazine can be used as an adhesive layer on metal, in particular for the adhesive bonding of a metallic substrate, in particular made of carbon steel, to rubber.

A W3 of a third belt of a belt layer arranged between a carcass and a tread portion is 65% to 85% of a tire maximum width Wm and a W4 of a fourth belt is 55% to 75% of the tire maximum width Wm. A metal cord adopted in a metal cord-rubber composite forming each of the third belt and the fourth belt is formed such that N atoms in a surface thereof is set in a range between 2 atom % and 60 atom % of and a Cu/Zn ratio in the surface is set in a range between 1 and 4. A rubber composition that coats the metal cord includes 1 part by mass to 15 parts by mass of silica and 0 parts by mass to 1 part by mass of cobalt-containing compound based on 100 parts by mass of a rubber component.

A tungsten wire according one aspect of the present disclosure includes: a metal wire containing one of tungsten and a tungsten alloy; and a plating layer which covers a surface of the metal wire. The plating layer contains copper.