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Tyre comprising a layer of circumferential reinforcing elements

A technology of reinforcing elements and reinforcements, which is applied to the reinforcement layers of pneumatic tires, heavy-duty tires, special tires, etc., can solve the problems of increased mileage and adverse effects on the durability of crown reinforcements, and achieve the effect of good cohesion.

Active Publication Date: 2014-08-13
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Justifiably, the setting of the conditions required for this type of tire to roll increases the mileage covered; however, the durability of the tire, particularly that of the crown reinforcement, is adversely affected

Method used

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  • Tyre comprising a layer of circumferential reinforcing elements
  • Tyre comprising a layer of circumferential reinforcing elements
  • Tyre comprising a layer of circumferential reinforcing elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0152] To facilitate understanding of the drawings, the drawings are not shown to scale. The figures show only a half view of a tire which extends symmetrically around an axis XX' representing the circumferential mid-plane or equatorial plane of the tyre.

[0153] exist figure 1 In , a tire 1 of size 315 / 70R22.5 has an aspect ratio H / S equal to 0.70, where H is the height of the tire 1 on its mounted rim and S is the maximum axial width. Said tire 1 comprises radial carcass reinforcement 2 fixed in two beads (not shown in the figures). The carcass reinforcement is formed from a single layer of metal cords. This carcass reinforcement 2 is sheathed by a crown reinforcement 4 formed radially from the inside to the outside by:

[0154] - a first working layer 41 formed of uncoated inextensible metal cords 9.28 continuous over the entire width of the layer and oriented at an angle of 24°,

[0155] - a layer 42 of circumferential reinforcing elements formed by metal cords of th...

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Abstract

The invention relates to a tyre (1) comprising a crown reinforcement (4) formed by at least two working crown layers (41, 43) of reinforcing elements, a layer C of rubber mix being disposed between at least the ends of the at least two working crown layers (41, 43) and the crown reinforcement (4) comprising at least one layer (42) of circumferential reinforcing elements. According to the invention, the tensile modulus at 10% elongation of layer C is greater than 9 MPa and the maximum value of tan(delta), denoted tan(delta)max, of layer C is less than 0.100.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, in particular tires intended to be mounted to vehicles carrying heavy loads and traveling at sustained speeds, such as vans, tractors, trailers or buses. Background technique [0002] In tires for heavy goods vehicles, the carcass reinforcement is usually fixed on either side in the bead area and is radially covered by a crown reinforcement consisting of at least two superimposed layers of Formed by parallel threads or cords in each layer, each layer crosses the next layer at an angle formed with the circumferential direction in the range of 10° to 45°. Said working layer forming the working reinforcement may further be covered by at least one layer called protective layer formed by reinforcing elements, advantageously metallic and stretchable and called elastic. It may also comprise a layer of metal threads or cords of low extensibility forming an angle with the circumferential...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/18
CPCB60C9/0007B60C2001/0075B60C2009/2016B60C2009/0078B60C2009/1828B60C9/18B60C9/185B60C9/2006B60C2009/2064B60C9/28B60C2009/2257B60C2009/2261B60C2009/1842B60C2200/06B60C9/1835B60C2009/2067B60C2009/2077B60C2009/2083B60C2009/2048C08K3/013C08L7/00
Inventor J·贝松F·巴尔巴林
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN