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Tires with improved dynamic properties

A technology for tires and carcass, which is applied to special tires, tire parts, reinforcement layers of pneumatic tires, etc., and can solve problems such as cracking and aggravation

Active Publication Date: 2018-04-17
MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Said cracking is further aggravated when overloaded and at high speeds on winding roads

Method used

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  • Tires with improved dynamic properties
  • Tires with improved dynamic properties
  • Tires with improved dynamic properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0092] exist figure 1 In , a tire 1 of size 315 / 70R 22.5 has an aspect ratio H / S equal to 0.70, where H is the tire height on the mounting rim of the tire 1 and S is its maximum axial width. Said tire 1 comprises a 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 hooped by a crown reinforcement 4 formed from the radially inner side to the outer side by:

[0093] - a first working layer 41 formed of unencapsulated non-extensible 9.28 metal cords continuous over the entire width of the ply and oriented at an angle equal to 24°,

[0094] - a layer 42 of circumferential reinforcing elements of the "dual modulus" type formed of 21x23 steel metal cords,

[0095] - a second working layer 43 formed of unencapsulated, non-extensible 9.28 metal cords continuous over the entire width of the ply and oriented at an angle equal to 24° and aligned with the m...

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PUM

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Abstract

The invention relates to a tyre, comprising a crown reinforcement formed by at least two working crown layers of reinforcing elements, said working crown layers intersecting from one layer to the next, simultaneously with The circumferential direction forms an angle between 10° and 45°. According to the invention, the first layer S of polymer mixture is in contact with at least one working crown layer and in contact with the carcass reinforcement, said first layer S of polymer mixture extending axially up to at least the axial ends of the tread Section, the complex dynamic shear modulus G* of the first layer S of the polymer mixture measured in a return cycle at 10% and 60° C. is greater than 1.35 MPa.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, and more particularly to tires intended to be fitted on vehicles carrying heavy loads and traveling at sustained speeds, such as trucks, tractors, trailers, or coaches. Background technique [0002] In heavy-duty types of tires, the carcass reinforcement is usually anchored on both sides in the bead area and is radially covered by a crown reinforcement composed of at least two layers superimposed on each other and formed by the Wires or cords are formed in each layer parallel and cross from one layer to the next forming an angle between 10° and 45° to the circumferential direction. Said working layer forming the working reinforcement may further be covered by at least one so-called protective layer formed by reinforcing elements, advantageously metallic and extensible, thus called elastic reinforcing elements. It may also comprise a layer of metal wires and cords of low extensib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/18B60C9/20
CPCB60C9/1835B60C9/185B60C9/2006B60C2009/1878B60C2009/2064B60C2001/0066B60C2001/0075C08K3/04C08K9/02C08K2201/006
Inventor H·雷哈布M·古普塔
Owner MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)