| 摘要 |
The invention relates to a radial tyre, in particular for a private passenger vehicle or van, having an improved belt structure (10) comprising a multilayer composite laminate (10a, 10b, 10c) of specific construction, including: a first layer (10a) of rubber (C1) comprising heat-shrinking circumferential textile reinforcements (110), e.g. of nylon or polyester, in the form of multifilaments twisted individually about themselves with a twist of more than 100 turns per metre. The first layer (10a) is mounted radially (in direction Z) on two other layers (10b, 10c) of rubber (C2, C3 respectively) reinforced with reinforcements (120, 130) and all or some of these reinforcements are composite reinforcements formed by steel monofilaments sheathed with a thermoplastic material having a glass transition temperature of more than 20°C. This laminate allows the weight of tyre belts to be reduced by reducing the thickness of the rubber layers forming part of the structure and, therefore, also allows the weight and rolling resistance of tyres to be reduced, without any risk of direct contact between the reinforcements (110, 120, 130). |
