摘要:
The invention relates to a tyre with a radial carcass reinforcement made up of at least one layer of reinforcing elements which is anchored in each of the beads by being wrapped around a bead wire, said wrapped-around portion of carcass reinforcement being reinforced by at least one layer of reinforcing or stiffening elements the radially outer end of which is radially on the outside of the end of the wrapped-around portion. According to the invention, the reinforcing elements of at least one stiffener are unwrapped metal cords with saturated layers which on the test known as the permeability test return a flowrate of less than 5 cm 3 /min, the radially inner end of said stiffener being radially on the inside of that point of the bead wire that is radially closest to the axis of rotation, and the elastic modulus of the polymer compounds in the calendered layers of the carcass reinforcement is less than or equal to 8 MPa.
摘要:
A tire having a radial carcass reinforcement, including at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls, wherein at least 85% of the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords having in what is called the permeability test a flow rate of less than 20 cm3/min, and in that at least 5% of the reinforcing elements of said at least one layer of the carcass reinforcement are cords comprising at least one strand consisting of textile multifilament yarns.
摘要:
The tyre (10) for a vehicle of construction type comprises a tread (22) and a crown reinforcement (14) arranged radially on the inside of the tread (22). The crown reinforcement (14) comprises: a protective reinforcement (36) comprising at least one protective ply (42, 44) having a breaking strength Fm NSP ; a working reinforcement (38) comprising at least one working ply (46, 48) having a breaking strength F MNST ; and a hoop reinforcement (39) comprising at least one hooping ply (40, 41), the hooping ply (40, 41) comprising reinforcing elements referred to as hoop reinforcements, the hoop reinforcing elements making an angle at most equal to 10° with the circumferential direction of the tyre (10); the working reinforcement (38) is arranged radially on the inside of the protective reinforcement (36); the ratio Fm NSP /Fm NSr is greater than or equal to 0.27 and less than or equal to 0.90.
摘要:
The invention relates to a tyre comprising a crown reinforcement formed of at least two working crown layers having unequal axial widths, a layer C of rubber compound being positioned between at least the ends of said at least two working crown layers, and the crown reinforcement comprising at least one layer of circumferential reinforcing elements positioned radially between two working crown layers. According to the invention, the distance d between the end of the axially narrowest working layer and the working layer separated from the axially narrowest working layer by the layer C of rubber compound is such that 1.1ø
摘要:
A tire having a radial carcass reinforcement, including at least one layer of reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls, wherein at least 85% of the reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped metal cords having in what is called the permeability test a flow rate of less than 20 cm3/min, and in that at least 5% of the reinforcing elements of said at least one layer of the carcass reinforcement are cords comprising at least one strand consisting of textile multifilament yarns.
摘要:
The invention relates to a tire having a radial casing reinforcement, consisting of at least one layer of metal reinforcement elements, said tire including a top reinforcement (5), itself radially covered with a tread (6), said tread being joined to two beads (3) via two sidewalls. According to the invention, the metal reinforcement elements of at least one layer of the casing reinforcement (2) are non-reinforced cables having, in the so-called perviousness test, a displacement of less than 20 cm 3 /mn, and in a radial plane, at least on a portion of the meridional profile of the tire, the rubber mixture thickness (E) between the inner surface of the tire cavity and the point of a metal reinforcement element of the casing reinforcement nearest to said inner surface of the cavity is less than or equal to 3.5 mm, and the rubber mixture thickness ratio between the inner surface of the tire cavity and the point of a metal reinforcement element of the casing reinforcement nearest said inner surface of the cavity of two separate portions of the tire is greater than 1.15.