Compagnie Generale Des Etablissements Michelin

Augustin Bosquet

Christophe Le Clerc

Anne-Lise Thuilliez

Jacky Pineau

Richard Cornille

Thomas Guy

Jérémy Guillaumain

Jeremy Guillaumain

A tire includes a carcass ply, two beads, two sidewalls, and a crown reinforcing zone. The carcass ply connects the two beads by way of the two sidewalls. The crown reinforcing zone is positioned radially external to the carcass ply. The crown reinforcing zone includes a plurality of reinforcing strips disposed in at least two layers. The reinforcing strips are coated in an elastomeric composition. A mean overlap between the reinforcing strips of the two layers is greater than 40%. The reinforcing strips are made of a thermoplastic film having a modulus greater than 0.9 GPa, and preferably greater than 2 GPa, in a main direction and in a transverse direction.

Pneumatic tire comprising reinforcing elements in the form of multi-layer tapes

A high modulus textile cord () with at least triple twist (T1, T2, T3) comprises at least N strands (), N being greater than 1, twisted together with a final twist T3 and a final direction D2, each strand being made up of M pre-strands (), M being greater than 1, themselves twisted together with an intermediate twist T2 (T2a, T2b, T2c, T2d) and an intermediate direction D1 opposite to D2, each pre-strand itself consisting of a yarn () which has been twisted on itself beforehand with an initial twist T1 (T1a, T1b, T1c) and the direction D1, in which at least half of the N times M yarns have an initial elastic modulus denoted Mi which is greater than 2000 cN/tex. This textile cord can advantageously be used as a reinforcer in tires for vehicles, particularly in the belt or carcass reinforcement of these tires.

High modulus textile cord with an at least triple twist

Growing community of inventors

Clermont-Ferrand, France

Augustin Bosquet