The invention relates to a hybrid cord for use as a reinforcement in a belt bandage of a pneumatic vehicle tire, consisting of at least two threads with ends which are twisted together. At least one first thread is a high-modulus thread with a specified thread fineness, and another thread is a low-modulus thread, said other low-modulus thread having a lower thread fineness than the first thread. The invention is characterized in that the proportion of the high-modulus thread in the hybrid cord is 80-95 wt. %; the difference between the thread fineness of the high-modulus thread and the thread fineness of the other low-modulus thread is >800 dtex; and the elongation at break of the high-modulus thread ranges from 1%-8%, and the elongation at break of the low-modulus thread ranges from 9%-30%.

Provided is a steel cord for rubber article reinforcement which has excellent corrosion resistance and productivity without deterioration of adhesion with rubber. A steel cord (1) for rubber article reinforcement, in which plural steel filaments (2) are twisted together, includes: a core having at least one core filament (2c); and a sheath having at least one sheath layer formed by twisting at least one sheath filament (2s) around the core. In this steel cord (1), brass plating is performed on the steel filaments (2) and zinc plating is further performed on the outer circumference of the brass plating of the core filament (2c), and the steel filaments (2) have a diameter d of 0.1 mm to 0.6 mm.

The subject of the invention is a cord (50) comprising a single layer (52) of helically wound metal filamentary elements (54). The metal filamentary elements define an internal enclosure (58) of the cord of diameter Dv. Each metal filamentary element (54) has a diameter Df and a helix radius of curvature Rf.

With Dv, Df and Rf being expressed in millimetres, the cord satisfies the following relationships:

9≤Rf/Df≤30, and

1.30≤Dv/Df≤2.10.

The invention relates to a reinforcement cord for elastomeric products, in particular for pneumatic tires, comprising at least one yarn made of filaments.

The invention further relates to an elastomeric product comprising at least one reinforcement cord.

For protection of the environment and conservation of resources, together with good processing performance, at least one yarn of the reinforcement cord comprises filaments made of polybutylene dicarboxyfuranoate (PBF), where the PBF has been produced entirely or at least to some extent from biomass and/or from renewable raw materials.

This invention relates to a passenger car tire comprising a carcass having at least one carcass ply, a tread disposed radially outward of a crown region of the carcass, a belt with a plurality of belt plies arranged between the carcass and the tread, and an overlay structure covering the belt and comprising a helically wound overlay ply strip reinforced by at least one textile cord. The cord comprises from 6 to 10 polyamide monofilament plies having each a density from 300 to 470 dtex, wherein the monofilament plies are twisted together by between 1 and 2 twists per inch to form the cord.

The present invention is directed to a rubber ply for a tire, the rubber ply comprising pairs of textile cords arranged in parallel in a plane, wherein each cord of the pairs of textile cords comprises two cord plies. The distance between two adjacent pairs of textile cords (d.sub.p) is at least 5 times larger than the distance between two parallel textile cords (d.sub.i) within a pair of textile cords, and wherein the two cord plies in one or more of the textile cords are twisted together in a range from 8 TPI to 12 TPI and have each a density ranging from 500 dtex to 2000 dtex. The present invention is also directed to a tire comprising such a rubber ply which is particularly applicable and beneficial for utilization in motorcycle tires.

Motorcycles tyre including a carcass structure, a zero-degree belt structure arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt structure. The belt structure includes at least one hybrid reinforcing cord that has an elongation greater than 4% when subjected to a load equal to about 50 N and a tangent modulus with a monotonic progression as the elongation increases for elongations comprised between 4% and at least 9%.

A two-layer multi-strand cord (60) comprises an internal layer (CI) of the cord made up of J>1 internal strands (TI) and an external layer (CE) of the cord made up of L>1 external strands (TE). The cord satisfies the relationship 95≤MC≤180, where MC=(J×MI+L×ME)/(J+L); MI=200×cos.sup.4(α)×[Q×(D1/2).sup.2×cos.sup.4(β)+P×(D2/2).sup.2×cos.sup.4(δ)+N×(D3/2).sup.2×cos.sup.4(γ)]/[Q×(D1/2).sup.2+P×(D2/2).sup.2+N×(D3/2).sup.2]; and ME=200×cos.sup.4(α′)×[Q′×(D1′/2).sup.2×cos.sup.4(ββ)+P′×(D2′/2).sup.2×cos.sup.4(δ′)+N′×(D3′/2).sup.2×cos.sup.4(γ′)]/[Q′×(D1′/2).sup.2+P′×(D2/2).sup.2+N′×(D3′/2).sup.2], where D1, D1′, D2, D2′, D3 and D3′ are in mm, α and α′ are the helix angle of each internal and external strand (TI), β and β′ are the helix angle of each internal thread (F1, F1′), δ and δ′ are the helix angle of each intermediate thread (F2, F2′) and γ and γ′ are the helix angle of each external thread (F3, F3′).

High performance textile cords having residual twist in ply-yarns in cord are used as reinforcement in bias and radial pneumatic tires. The high performance textile cords have a residual ply-yarn twist multiplier, wherein the residual ply-yarn twist multiplier is greater than 1,000 and less than 4,000 and a residual twist direction of a plurality of ply-yarns in Z or S direction is in an opposite direction of a cord twist, in S or Z direction.

A motorcycle tyre includes a tread portion, a pair of bead portions, a toroidal carcass extending between the pair of bead portions, and a band layer disposed outward in a tyre radial direction of the carcass and inside the tread portion. The band layer includes a band ply having one or more steel cords spirally wound in a tyre circumferential direction. The tyre has a parameter (A) in which a load index LI (kg) of the tyre is divided by a bending/compression stiffness ratio that is obtained by dividing a bending stiffness (g.Math.cm) of the steel cords by a compression stiffness (N/mm) of the steel cords being in a range of 1500 to 6000.