Abstract:
The invention relates to a tyre tread having a tyre tread rubber composition based on at least one diene elastomer, one reinforcing filler and one vulcanization system, characterized in that the composition comprises a guar gum powder in a proportion of 10 to 40 pce.The invention also relates to a process for obtaining a rubber composition for a tread based on at least one diene elastomer, one reinforcing filler and one vulcanization system which comprises a first phase of thermomechanical kneading of the constituents of the composition, with the exception of the vulcanization system, characterized in that the composition comprises a guar gum powder in a proportion of 10 to 40 pce and in that the guar gum powder is incorporated during the first kneading phase.
Abstract:
The invention relates to a tire tread having a composition based on at least one diene elastomer, one reinforcing filler and one vulcanization system, characterized in that the composition comprises a xanthan gum powder in a proportion of 10 to 40 pce.The invention also relates to a process for obtaining a rubber composition for a tread based on at least one diene elastomer, one reinforcing filler and one vulcanization system which comprises a first phase of thermomechanical kneading of the constituents of the composition, with the exception of the vulcanization system, characterized in that the composition comprises a xanthan gum powder in a proportion of 10 to 40 pce and in that the xanthan gum powder is incorporated during the first kneading phase.
Abstract:
Tire tread (1) comprising a plurality of blocks (6), each block (6) comprising a leading face (61), a trailing face (62) and a contact face (60), the leading face (61) making a mean angle αA greater than 0 degrees, the trailing edge (62) making a mean angle αF greater than 0 degrees, the angle αA of the leading face (61) being greater than the angle αF of the trailing face, each block (6) comprises an incision (7) extending into the thickness of the block, this incision (7) being delimited by opposing faces provided with blocking means (71) for blocking the relative movements of one of the said faces with respect to the other face in at least one direction, this incision (7) dividing the contact face (60) of the block into two parts with substantially equal surface areas, this tread being characterized in that the incision (7) is inclined by a mean angle β, measured with respect to the perpendicular to the contact face (60) in the same direction as the angle αA of the leading face and in that the volume of material contained between the leading face (61) and the incision (7) is less than the volume of material contained between the trailing face (62) and the same incision (7).
Abstract:
A composite cord includes a rubber core and a rubber sheath surrounding, at least in part, the rubber core. A formulation of the core is different from that of the sheath. The rubber core includes at least one diene elastomer and more than 30 phr of a filler A. The filler A includes nanoparticles having a weight-average size of less than 500 nm. The rubber sheath includes at least one diene elastomer, from 0 to less than 30 phr of a filler A′, and more than 70 phr of a filler B. The filler A′ includes nanoparticles having a weight-average size of less than 500 nm. The filler B includes microparticles having a weight-median size of greater than 1 μm.
Abstract:
The invention relates to a tyre tread having a tyre tread rubber composition based on at least one diene elastomer, one reinforcing filler and one vulcanization system, characterized in that the composition comprises a guar gum powder in a proportion of 10 to 40 pce.The invention also relates to a process for obtaining a rubber composition for a tread based on at least one diene elastomer, one reinforcing filler and one vulcanization system which comprises a first phase of thermomechanical kneading of the constituents of the composition, with the exception of the vulcanization system, characterized in that the composition comprises a guar gum powder in a proportion of 10 to 40 pce and in that the guar gum powder is incorporated during the first kneading phase.
Abstract:
The invention relates to a tyre tread having a composition based on at least one diene elastomer, one reinforcing filler and one vulcanization system, characterized in that the composition comprises a xanthan gum powder in a proportion of 10 to 40 pce.The invention also relates to a process for obtaining a rubber composition for a tread based on at least one diene elastomer, one reinforcing filler and one vulcanization system which comprises a first phase of thermomechanical kneading of the constituents of the composition, with the exception of the vulcanization system, characterized in that the composition comprises a xanthan gum powder in a proportion of 10 to 40 pce and in that the xanthan gum powder is incorporated during the first kneading phase.
Abstract:
Tread for a tire for a heavy goods vehicle of total thickness E and of total volume V, having at least one continuous groove comprising: at least two wearing layers in the thickness of the tread, each having a thickness at most equal to 75% of the total thickness E of the tread, a plurality of external cavities and a plurality of internal cavities positioned radially and entirely on the inside of the tread surface in the new state, each internal cavity being connected to an external cavity by a connecting channel, and having a total voids volume Vc at least equal to 7% and at most equal to 12% of a volume equal to the sum of the total volume V and of the total voids volume, and having an effective voids volume Ve for each wearing layer less than the total voids volume Vc, and satisfying the equation: 0.4 St −65° C.
Abstract translation:具有总厚度E和总体积V的用于重型货车的轮胎的胎面具有至少一个连续槽,胎面的厚度至少等于胎面厚度的至少两个磨损层,其厚度至多等于 胎面的总厚度E,多个外部空腔和在新状态下径向且全部位于胎面表面内侧的内部空腔,每个内部空腔通过连接通道连接到外部空腔,并且 具有等于总体积V和总空隙体积的总和的体积的至少等于7%且至多等于12%的总空隙体积Vc,并且对于每个磨损层具有有效空隙体积Ve 并且满足以下等式:0.4 St -65℃的SBR共聚物。
Abstract:
A composite cord includes a rubber core and a rubber sheath surrounding, at least in part, the rubber core. A formulation of the core is different from that of the sheath. The rubber core includes at least one diene elastomer and more than 30 phr of a filler A. The filler A includes nanoparticles having a weight-average size of less than 500 nm. The rubber sheath includes at least one diene elastomer, from 0 to less than 30 phr of a filler A′, and more than 70 phr of a filler B. The filler A′ includes nanoparticles having a weight-average size of less than 500 nm. The filler B includes microparticles having a weight-median size of greater than 1 μm.
Abstract:
Tread for a tire for a heavy goods vehicle of total thickness E and of total volume V, having at least one continuous groove comprising: at least two wearing layers in the thickness of the tread, each having a thickness at most equal to 75% of the total thickness E of the tread, a plurality of external cavities and a plurality of internal cavities positioned radially and entirely on the inside of the tread surface in the new state, each internal cavity being connected to an external cavity by a connecting channel, and having a total voids volume Vc at least equal to 7% and at most equal to 12% of a volume equal to the sum of the total volume V and of the total voids volume, and having an effective voids volume Ve for each wearing layer less than the total voids volume Vc, and satisfying the equation: 0.4 St −65° C.
Abstract translation:具有总厚度E和总体积V的用于重型货车的轮胎的胎面具有至少一个连续槽,胎面的厚度至少等于胎面厚度的至少两个磨损层,其厚度至多等于 胎面的总厚度E,多个外部空腔和在新状态下径向且全部位于胎面表面内侧的内部空腔,每个内部空腔通过连接通道连接到外部空腔,并且 具有等于总体积V和总空隙体积的总和的体积的至少等于7%且至多等于12%的总空隙体积Vc,并且对于每个磨损层具有有效空隙体积Ve 并且满足以下等式:0.4 St -65℃的SBR共聚物。
Abstract:
Tire tread (1) comprising a plurality of blocks (6), each block (6) comprising a leading face (61), a trailing face (62) and a contact face (60), the leading face (61) making a mean angle αA greater than 0 degrees, the trailing edge (62) making a mean angle αF greater than 0 degrees, the angle αA of the leading face (61) being greater than the angle αF of the trailing face, each block (6) comprises an incision (7) extending into the thickness of the block, this incision (7) being delimited by opposing faces provided with blocking means (71) for blocking the relative movements of one of the said faces with respect to the other face in at least one direction, this incision (7) dividing the contact face (60) of the block into two parts with substantially equal surface areas, this tread being characterized in that the incision (7) is inclined by a mean angle β, measured with respect to the perpendicular to the contact face (60) in the same direction as the angle αA of the leading face and in that the volume of material contained between the leading face (61) and the incision (7) is less than the volume of material contained between the trailing face (62) and the same incision (7).