TYRE HAVING A CROWN REGION PROVIDED WITH AN UNDERLAYER COMPRISING A THERMOPLASTIC ELASTOMER

摘要

A radial tyre for a vehicle includes a crown with a tread having a radially outer part intended to contact a road surface; two beads; two sidewalls connecting the beads to the tread; a carcass reinforcement that extends into the sidewalls and is anchored in the beads; a crown reinforcement positioned circumferentially between the radially outer part of the tread and the carcass reinforcement; and an underlayer. The underlayer: is formed of a radially inner elastomer layer and has a formulation different from that of the radially outer part of the tread, is positioned circumferentially between the radially outer part of the tread and the carcass reinforcement; includes a thermoplastic elastomer that is a block copolymer formed of an elastomer block and a thermoplastic block, with a total content of the thermoplastic elastomer being within 65 to 100 phr (parts by weight per hundred parts of elastomer).