摘要:
The invention relates to a tyre provided with an outer sidewall, said outer sidewall including at least one elastomeric composition made from: a) an elastomeric matrix including at least one diene elastomer, b) a cross-linking system, and c) at least one polymer that is incompatible with the elastomeric matrix. The invention also relates to a method for preparing an elastomeric composition for an outer sidewall.
摘要:
The present invention relates to a radial tyre (1) for a motor vehicle, comprising a crown (2) having a tread (3) provided with at least one radially external portion (3a) intended to enter into contact with the road; two inextensible beads (4), two sidewalls (5) linking the beads (4) to the tread (3), a carcass reinforcement (6) passing into the two sidewalls (5) and anchored in the beads (4); a crown reinforcement or belt (7) disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6); a radially internal elastomer layer (8), called "sub-layer", different in composition from the composition of the radially external portion (3a) of the tread, said sub-layer itself being disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6), characterized in that said sub-layer comprises at least one thermoplastic elastomer, said thermoplastic elastomer being a block copolymer comprising at least one elastomer block and at least one thermoplastic block, the total amount of thermoplastic elastomer being in a range varying from 65 to 100 phr (parts by weight per hundred parts of elastomer), said sub-layer also comprising at least one conductive filler.
摘要:
The present invention concerns a radial tyre (1) for a motor vehicle, comprising a crown (2) comprising a tread (3) provided with at least one radially external portion (3a) intended to enter into contact with the road; two inextensible beads (4), two sidewalls (5) linking the beads (4) to the tread (3), a carcass reinforcement (6) passing into the two sidewalls (5) and anchored in the beads (4); a crown reinforcement or belt (7) disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6); a radially internal elastomer layer (8), called "sub-layer", different in composition to the composition of the radially external portion (3a) of the tread, said sub-layer itself being disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6); characterised in that said sub-layer comprises at least one thermoplastic elastomer, said thermoplastic elastomer being a block copolymer comprising at least one elastomer block and at least one thermoplastic block, the total amount of thermoplastic elastomer being comprised in a range varying from 65 to 100 pce (parts by weight per hundred parts of elastomer) and characterised in that said sub-layer has a ratio of elastic modulus at 200°C and at 60°C different to that of the adjacent layers, such that the following equation is satisfied with each of the adjacent layers:
摘要:
The invention relates to a tyre comprising at least one rubber composition made from at least one diene elastomer, a reinforcing filler, a plasticizing system and a cross-linking system, characterized in that the composition comprises hexagonal boron nitride having a BET specific surface area greater than or equal to 10 m 2 /g as the reinforcing filler with a content from 30 to 350 parts per hundred of elastomer, phr, and a coupling agent capable of binding the boron nitride to the diene elastomer.
摘要:
A radial tyre (1) for a motor vehicle, comprising a crown (2) having a tread (3) provided with at least one radially external portion (3a) intended to enter into contact with the road; two inextensible beads (4), two sidewalls (5) linking the beads (4) to the tread (3), a carcass reinforcement (6) passing into the two sidewalls (5) and anchored in the beads (4); a crown reinforcement or belt (7) disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6); a radially internal elastomer layer (8), called "sub-layer", different in composition from the composition of the radially external portion (3a) of the tread, said sub-layer itself being disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6), characterized in that said sub-layer comprises at least one thermoplastic elastomer, said thermoplastic elastomer being a block copolymer comprising at least one elastomer block and at least one thermoplastic block, the total amount of thermoplastic elastomer being in a range varying from 65 to 100 phr (parts by weight per hundred parts of elastomer), said sub-layer also comprising at least one magnetic filler.
摘要:
Pneumatic object or inflatable item provided with a gastight elastomer layer comprising at least one polyisobutylene-block thermoplastic elastomer and a lamellar filler, such that E' x /E' z > 1.2 and E' Y /E' z > 1.2, wherein: Z is a direction normal to the gastight elastomer layer; X and Y are two directions orthogonal to Z; and E' x , E' Y and E' z are the dynamic compression moduli of the gastight elastomer layer along directions X, Y and Z respectively.
摘要:
The present invention concerns a method for retreading a radial tyre (1) for a motor vehicle, comprising: o a crown (2) comprising a tread (3) provided with at least one radially external portion (3a) intended to enter into contact with the road; o two inextensible beads (4), two sidewalls (5) linking the beads (4) to the tread (3), a carcass reinforcement (6) passing into the two sidewalls (5) and anchored in the beads (4); o a crown reinforcement or belt (7) disposed circumferentially between the radially external portion (3a) of the tread (3) and the carcass reinforcement (6); o a radially internal elastomer layer (8), called "sub-layer", different in composition to the composition of the radially external portion (3a) of the tread, said sub-layer itself being disposed circumferentially between the radially external portion (3a) of the tread (3) and the crown reinforcement (7); said sub-layer comprising at least one thermoplastic elastomer, said thermoplastic elastomer being a block copolymer comprising at least one elastomer block and at least one thermoplastic block, the total amount of thermoplastic elastomer being comprised in a range varying from 65 to 100 pce (parts by weight per hundred parts of elastomer); said method comprising a step consisting of removing said tread from the tyre structure by softening said sub-layer.