Radial tyre with lightened belt structure

A belt layer and tire technology, applied to tire parts, reinforcement layers of pneumatic tires, vehicle components, etc., can solve problems such as difficult physical constraints, obstructions, adverse tire performance and overall durability, and achieve low drag Effect

Active Publication Date: 2014-10-22
SOCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Concentrating efforts to reduce the mass of tires, especially by reducing the thickness of their belts and layers made of rubber, however, quite naturally encounters physical limitations that can give rise to several difficulties
In particular, the hooping function provided by the hooping reinforcement and the stiffening function provided by the working reinforcement can become no longer clearly distinguishable from each other and can interfere with each other, not to mention causing the textile circumferential wires to intertwine with the metal of the working ply Risk of direct contact between cords
Of course, all of this is detrimental to the proper operation of the tire's crown, and is detrimental to the performance and overall durability of the tire

Method used

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  • Radial tyre with lightened belt structure
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Embodiment Construction

[0033] definition

[0034] The terms in this application should be understood as follows:

[0035] - "rubber" or "elastomer" (these two terms are considered synonymous): elastomers of any type, whether diene or non-diene, such as thermoplastic types;

[0036] - "rubber compound" or "rubber-like compound": a compound containing at least one rubber and one filler;

[0037] - "layer": sheet, strip or any other element whose thickness is relatively small relative to its other dimensions, preferably wherein the ratio of thickness to the largest of the other dimensions is less than 0.5, more preferably less than 0.1;

[0038] - "axial" means a direction substantially parallel to the axis of rotation of the tyre;

[0039] - "circumferential": a direction substantially perpendicular to both the axial and radial directions of the tyre (in other words, tangent to a circle whose center lies on the tyre's axis of rotation);

[0040] - "radial": a direction along the radius of the tyre...

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Abstract

Radial tyre, notably for a passenger vehicle or light van, with a lightened belt structure (10) comprising a multilayer composite laminate (10a, 10b, 10c) of specific construction, with a first layer (10a) of rubber (Cl) containing circumferential textile reinforcements (110) which are weakly heat-shrinkable, for example made of nylon or of polyester, this first layer radially (in the direction Z) surmounting two other layers (10b, 10c) of rubber (respectively C2, C3) reinforced with monofilaments (120, 130) of high strength steel; this multilayer composite laminate makes it possible to reduce the weight and rolling resistance of tyres without adversely affecting the cornering stiffness and therefore road holding, while at the same time offering road running endurance that is at least equal if not improved.

Description

technical field [0001] The present invention relates to tires and to their crown reinforcement or belt. More specifically, the present invention relates to multilayer composite laminates for use in belts of tires, especially for passenger cars or trucks. Background technique [0002] A tire with a radial carcass reinforcement is known for passenger cars or trucks comprising a tread, two inextensible beads, two flexible sidewalls connecting the beads to the tread and circumferentially arranged carcass The rigid crown reinforcement or "belt" between the reinforcement and the tread. [0003] The tire belt usually consists of at least two rubber plies (called "working plies", "triangular plies" or even "working reinforcements") that overlap and intersect, usually by Reinforced by metal cords inclined in the middle circumferential plane, these working plies may or may not be associated with other plies in rubber and / or fabric. The main function of these working plies is to imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/20
CPCB60C9/0064B60C9/2009B60C2009/2247B60C2009/2266B60C2009/2067B60C2009/2257B60C9/22B60C9/0042B60C2009/2012B60C2009/2016B60C2009/2077B60C2009/2083
Inventor A·拉德雅内C·勒克莱尔J·莫雷尔-让A·维尔莱纳
Owner SOCIETE DE TECH MICHELIN
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