The invention relates to a tyre, the tread (6) of which comprises at least two layers (61, 62) of elastomer blends. According to the invention, the two working crown layers (51, 52) and at least one layer (53) of circumferential reinforcing elements (43) are only present to form the crown reinforcement (5) over at least 80% of the width of the tread (6), the absolute value of the difference between the absolute values of the angles ᾳ2 et ᾳ1 being greater than 4°, ᾳ2 being greater than ᾳ1 in absolute terms, the mean angle ᾳ satisfying the relationship 14+131*exp(-L/100) < α < 28+110*exp(-L/100). According to the invention, the first layer (51) forming the radially exterior portion of the tread is formed by a first elastomer blend, the elastic modulus of which in tensile stress at 10% elongation is less than or equal to 10 MPa, and the second layer (62) is formed by a central portion (621) and two axially exterior portions (622), said central portion, which has a thickness greater than or equal to 1 + max(1.5*(p2- 1.5) + 11*(F2/FR2 - 0.14),0), is formed by a second elastomer blend having an elastic modulus in tensile stress at 10% elongation of greater than or equal to 15 MPa and a maximum tan(δ) value of less than or equal to 0.30, the axially exterior portions (622) being formed by a third elastomer blend having a maximum tan(δ) value of less than 0.15.
PNEUMATIQUE COMPORTANT UNE BANDE DE ROULEMENT CONSTITUEE DE PLUSIEURS MELANGES ELASTOMERIQUES
TYRE COMPRISING A TREAD FORMED BY MULTIPLE ELASTOMER BLENDS
REIFEN MIT EINER LAUFFLÄCHE AUS MEHREREN ELASTOMERMISCHUNGEN
2023-08-16
Patent
Electronic Resource
French
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
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