An electrically conductive yarn (200, 300) comprising a first yarn (262, 362) and a second yarn (264, 364), the first yarn (262, 362) comprises or consists out of a plurality of stainless steel fibers, the second yarn (264, 364) comprises organic fibers wherein the first yarn (362) and the second yarn (364) are twisted or cabled together or the second yarn (264) is wrapped around the first yarn (262) such that the first yarn (262) is provided as a core yarn and such that the first yarn (262) provides part of the surface of the electrically conductive yarn (200).

An electrically conductive yarn (200, 300) comprising a first yarn (262, 362) and a second yarn (264, 364), the first yarn (262, 362) comprises or consists out of a plurality of stainless steel fibers, the second yarn (264, 364) comprises organic fibers wherein the first yarn (362) and the second yarn (364) are twisted or cabled together or the second yarn (264) is wrapped around the first yarn (262) such that the first yarn (262) is provided as a core yarn and such that the first yarn (262) provides part of the surface of the electrically conductive yarn (200).

Pneumatic tire including a circumferential tread, a circumferential belt layer, spaced apart first and second bead regions with respective first and second mounting surfaces adapted for mounting the tire on a rim of a wheel, respective first and second sidewalls respectively extending between respective first and second bead regions and the tread, a carcass ply extending between the first and second bead regions, and an electrically conductive cord including electrically conductive fibers, the cord extending from the first bead region to the tread, and/or to the circumferential belt layer, and/or to the second bead region, thereby providing a path of increased electrical conductivity via the electrically conductive cord, wherein the fibers have a length from 1 mm to 100 mm, and a diameter from 1 μm to 100 μm.

Pneumatic tire including a circumferential tread, a circumferential belt layer, spaced apart first and second bead regions with respective first and second mounting surfaces adapted for mounting the tire on a rim of a wheel, respective first and second sidewalls respectively extending between respective first and second bead regions and the tread, a carcass ply extending between the first and second bead regions, and an electrically conductive cord including electrically conductive fibers, the cord extending from the first bead region to the tread, and/or to the circumferential belt layer, and/or to the second bead region, thereby providing a path of increased electrical conductivity via the electrically conductive cord, wherein the fibers have a length from 1 mm to 100 mm, and a diameter from 1 μm to 100 μm.

Tire (1) having sidewalls (2), a substantially electrically insulating crown block (7) and a substantially insulating tread (8), the tire (1) also having at least one conductive peg (21) that is oriented in the radial direction and positioned under the tread (8) of the tire so as to create an electrically conductive path between the ground and a rim on which the tire is able to be mounted.

A process for building tyres for vehicle wheels includes: forming a tyre in process, the tyre including a belt structure and depositing a tread band in a position radially external to the belt structure by winding a continuous elongated element made of elastomeric material according to axially adjacent or partially overlapped coils. During the deposition of the tread band and on at least one of the coils already wound, a conductive liquid elastomeric compound is applied, the compound continuously extended between a radially outer surface of the tread band and a radially outer surface of the belt structure to generate electrically conductive paths and free zones.

A tire having a transponder comprises: a crown which has a crown reinforcement with an axial end at each edge, joined at each of its axial ends to a bead, which has an inner end, by a sidewall; a carcass reinforcement which is formed of adjacent first wires and is anchored in each bead around a spiral formed by second wires; the transponder comprising a core defining a first axis, a first cover wire helically wound around the core and an electrical insulation device; and the first cover wire comprising at least two conductive wire elements galvanically connected to an electronic chip comprising a radiofrequency transceiver component. The thickness of the elastomer mixture separating the outer cover wire, which is located furthest outwards from the first axis, and the reinforcements is greater than 0.5 millimeter.

A tire for a vehicle comprises a tread (2), of which the central part of the tread (2) comprises at least two rubber compounds (221, 222), making up at least 90% of its volume. The first compound (221) is radially on the outside of the second compound (222) and makes up at least 40% and at most 60% of the volume of the central part. The second rubber compound (222) has a Shore hardness DS2 at least equal to 5 plus the Shore hardness DS1 of the first compound (221) and dynamic losses at a temperature of 0° C. and 23° C. that are at least equal to those of the first rubber compound (221). The axially outer parts of the tread are made up of a third compound (223) capable of touching the ground, having a stiffness and a hysteresis that are lower than those of the first compound.

A modulus at 300% elongation of a cap tread ranges from 3.0 Mpa to 7.0 Mpa, a modulus at 300% elongation of a undertread ranges from 10.0 Mpa to 20.0 Mpa, and a modulus at 300% elongation of an earthing tread ranges from 10.0 Mpa to 20.0 Mpa. Additionally, an earthing tread is made from a rubber material with a volume resistivity of 1×10{circumflex over ( )}7Ω.Math.cm or less. The undertread includes a thickened portion in a region between the earthing tread and an edge portion of a block. The gauge of the undertread gradually increases from the earthing tread toward the edge portion of the block due to the thickened portion.

Tires having an electrically conductive tire sealing material containing metallic electrically conductive particles are described for detecting the presence of one or more sealed puncture areas in the tire. The tires can have a sealed tire portion that is formed by the electrically conductive tire sealing material flowing into and filling a puncture in the tire. The sealed tire portion includes a portion having electrically conductive particles and the portion being at the outer surface of the tire such as in the tread area. The tire can be positioned to be in contact with a conductive section of an apparatus capable of measuring electrical conductivity.