Abstract: Materials make it possible to generate mechanical coupling in elastomeric compositions, of use especially for the manufacture of tyre treads. In particular, a tread comprises a composite material based on an elastomeric matrix, a crosslinking system, a reinforcing filler and oriented short fibres.

Abstract: Materials make it possible to generate mechanical coupling in elastomeric compositions, of use especially for the manufacture of tyre treads. In particular, a tread comprises a composite material based on an elastomeric matrix, a crosslinking system, a reinforcing filler and oriented short fibres.

Abstract: A tire has a tread that comprises a rubber composition based on at least, an elastomer matrix; a reinforcing filler comprising more than 150 phr of a reinforcing inorganic filler; and a plasticizing agent comprising more than 30 phr of at least one liquid plasticizer exhibiting a glass transition temperature less than ?70° C.

Abstract: The present invention relates to materials making it possible to generate mechanical coupling in elastomeric compositions, of use especially for the manufacture of tyre treads. It relates in particular to a tread comprising a stack of layers having high and low stiffness moduli.

Abstract: A tread for a pneumatic tire includes tread pattern elements and cuts. Each tread pattern element includes lateral faces and a contact face that comes into contact with a road surface when the tire is being driven thereon. A boundary between the contact face and the lateral faces forms at least one edge corner. The cuts are formed as grooves and/or sipes, with the cuts being delimited by opposing lateral faces of the tread pattern elements. Each tread pattern element is formed of at least one rubber compound. When the tread is viewed in cross section in a plane normal to an axis of rotation of the tire and passing through a contact face of a tread pattern element, at least one of the cuts adjacent to that contact face is covered at least in part with a covering layer that contains a woven or nonwoven fiber assembly.

Abstract: A tread for a pneumatic tyre includes tread pattern elements and cuts. Each tread pattern element includes lateral faces and a contact face that comes into contact with a road surface when the tyre is being driven thereon. A boundary between the contact face and the lateral faces forms at least one edge corner. The cuts are formed as grooves and/or sipes, with the cuts being delimited by opposing lateral faces of the treat pattern elements. Each tread pattern element is formed of at least one rubber compound. When the tread is viewed in cross section in a plane normal to an axis of rotation of the tyre and passing through a contact face of a tread pattern element, at least one of the cuts adjacent to that contact face is covered at least in part with a covering layer that contains a woven or nonwoven fibre assembly.

Abstract: A vehicle tyre, usable in winter weather, includes a tread formed of a rubber composition that is heat-expandable when in an unvulcanized state, and expanded when in a vulcanized state. When unvulcanized, the composition includes a diene elastomer, such as natural rubber and/or a polybutadiene; more than 50 phr of a reinforcing filler, such as silica and/or carbon black; between 5 and 25 phr of a sodium- or potassium-including carbonate or hydrogen carbonate; and between 2 and 20 phr of a carboxylic acid having a melting point between 60° C. and 220° C., such as citric acid or stearic acid. A total content of the carboxylic acid and the carbonate or the hydrogen carbonate is greater than 10 phr. Presence of the carboxylic acid and the carbonate or the hydrogen carbonate makes it possible to greatly improve the tyre's grip on melting ice.

Abstract: A rubber composition usable as tread for a winter tire, having a high grip on melting ice, comprising at least one diene elastomer such as natural rubber and/or a polybutadiene, more than 30 phr of a liquid plasticizing agent, between 50 and 150 phr of a reinforcing filler such as silica and/or carbon black, and between 5 and 40 phr of magnesium sulphate microparticles.

Abstract: A tread 1 having a tread surface 3 onto which there opens at least one cavity 2, this cavity being bounded by a cavity wall 20 comprising a bottom wall 21 extended by a side wall 22 intersecting the tread surface to form at least one edge corner 31, this tread being, over at least part of the wall of the cavity 2, provided with a plurality of supporting strands 4, each supporting strand 4 comprising two ends of which one end 41 is attached to the cavity wall 20, this tread being characterized in that the supporting strands 4 each comprise at least one branching formed by the attachment of at least one branching strand 5.

Abstract: A tyre is formed of a tread that includes, in the unvulcanized state, a heat-expandable rubber composition. The rubber composition includes at least a diene elastomer, 70 to 120 phr of a reinforcing filler, between 5 and 25 phr of a blowing agent, and between 5 and 25 phr of a thermofusible compound. The melting point of the thermofusible compound is between 70° C. and 150° C. and the total amount of the blowing agent and the thermofusible compound is greater than 15 phr. The rubber composition provides improved grip for the tread on melting ice.

Abstract: A rubber composition usable as tread for a winter tire, having a high grip on melting ice, comprising at least one diene elastomer such as natural rubber and/or a polybutadiene, more than 30 phr of a liquid plasticizing agent, between 50 and 150 phr of a reinforcing filler such as silica and/or carbon black, and between 5 and 40 phr of magnesium sulphate microparticles.

Abstract: A tread 1 having a tread surface 3 onto which there opens at least one cavity 2, this cavity being bounded by a cavity wall 20 comprising a bottom wall 21 extended by a side wall 22 intersecting the tread surface to form at least one edge corner 31, this tread being, over at least part of the wall of the cavity 2, provided with a plurality of supporting strands 4, each supporting strand 4 comprising two ends of which one end 41 is attached to the cavity wall 20, this tread being characterized in that the supporting strands 4 each comprise at least one branching formed by the attachment of at least one branching strand 5.