Patent ID: 8631846

Claim:
A pneumatic tyre with a built-in self-sealing layer, the tyre comprising: an outer rubbery tread; a carcass reinforcement; a gastight layer located at an inside position relative to the carcass reinforcement; a protective layer located at an innermost position; and a self-sealing layer adjacent to the protective layer and located at an inside position relative to the gastight layer, wherein the protective layer is comprised of a thermoplastic film that includes a block copolymer formed of hard blocks and soft blocks corresponding to a formula: -(BR-BS) n -, where: BR represents a hard block that includes a polyamide or of a blend of polyamides, BS represents a soft block that includes a polyether, a blend of polyethers, or a polyether/polyester copolymer, and n represents a number of (BR-BS) units of the block copolymer, and wherein a thickness of the thermoplastic film of the protective layer is between 5 and 50 micrometers.