Antistatic vehicle tire and method of manufacturing such a tire

摘要

The invention relates to a vehicle tire comprising a tread portion and a package of reinforcement layers arranged underneath the tread portion. The tread portion comprises a tread base layer arranged underneath the tread layer, and at least one rubber member that extends in the radial direction of the tire from the ground contacting surface to the reinforcement package. The tread layer rubber composition has an electrical resistivity at room temperature of more than 108 ohm-cm, the tread base layer rubber composition of between 106 ohm-cm and 108 ohm-cm, the member rubber composition of less than 106 ohm-cm; and the rubber composition of at least one layer of the reinforcement package has a electrical resistivity at room temperature of less than 106 ohm-cm. The vehicle tire combines a low rolling resistance with improved conductivity to avoid build-up of static electricity.

主权项

1. A vehicle tire comprising:
a tread portion and a package of rubberized reinforcement layers arranged radially inwards from the tread portion, the tread portion comprising a tread rubber layer that provides a ground contacting surface and is disposed in a radially outward part of the tire, and a tread base rubber layer arranged radially inwards from the tread layer, the tread portion further comprising at least one rubber member that extends in the radial direction of the tire from the ground contacting surface to at least one layer of the reinforcement package, the rubber composition of the tread rubber layer having an electrical resistivity at room temperature of more than 108 ohm-cm; the rubber composition of the tread base rubber layer having an electrical resistivity at room temperature of between 106 ohm-cm and 108 ohm-cm; the rubber composition of the at least one rubber member having an electrical resistivity at room temperature of less than 106 ohm-cm; and the rubber composition of the at least one layer of the reinforcement package having an electrical resistivity at room temperature of less than 106 ohm-cm.