Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Alain Faugeras

Frédéric Pialot

Jose Merino Lopez

Antonio Delfino

Milan Fedurco

José Merino Lopez

Marco Ribezzo

Henri Hinc

Jean-Marie Dettorre

Gérard Bor

Michel Deboeuf

Michel Druet

Nicolas Jaunet

Christian Beaudonnet

Philippe Bournerie

Frédéric Ramz

A laminate comprising a first layer and a second layer directly covering the first layer, the first layer being a layer of a silicone rubber composition comprising a micrometric silicone powder and a mixture of crosslinkable organopolysiloxanes, the second layer being a layer of a silicone rubber composition comprising a hydrophobic silica and a mixture of crosslinkable organopolysiloxanes, is provided. The first layer and the second layer are crosslinked. The laminate, in particular when it is used as a coating for the outer surface of an expandable bladder for a tire curing mold, makes it possible to eliminate molding defects on the inner liner of the tire.

Laminate based on silicone rubber compositions

A curing bladder () for a tire has a shape of revolution about a central axis and a flexible wall made of crosslinked rubber, the external surface of which is intended to come into contact with the internal surface of a green tire during curing, the external surface having a relief structure having a plurality of air evacuation channels. The relief structure has first channels forming air evacuation grooves () arranged at a distance of between 2 and 5 mm, and having a depth of between 0.4 and 1 mm, two adjacent grooves defining, between one another, an inter-groove zone () having second channels forming air channelling furrows () made so as to communicate with one another and with at least one of the grooves (), the furrows each having a depth of between 0.01 and 0.4 mm and being situated at a distance of between 0.2 and 1 mm from one another.

Curing membrane for a tire

The curing bladder for a tire has a shape of revolution around a central axis and comprises a flexible wall made of crosslinked rubber. The surface of the wall is covered with a coating film made of a non-stick composition. When the bladder is non-inflated, the coating film has a variable thickness over the surface.

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Clermont-Ferrand, France

Alain Faugeras