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1. WO2020065175 - TYRE WITH CARCASS REINFORCEMENT REINFORCED BY A LAYER OF REINFORCING ELEMENTS IN THE BEAD REGION

Publication Number WO/2020/065175
Publication Date 02.04.2020
International Application No. PCT/FR2019/052150
International Filing Date 16.09.2019
IPC
B60C 15/06 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips
B60C 15/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
15Tyre beads, e.g. ply turn-up or overlap
B60C 1/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
1Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
CPC
B60C 15/0009
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
0009features of the carcass terminal portion
B60C 15/06
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips ; and reinforcing layers for the construction of the bead
B60C 15/0607
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips ; and reinforcing layers for the construction of the bead
0603characterised by features of the bead filler or apex
0607comprising several parts, e.g. made of different rubbers
B60C 2001/005
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
1Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
005Compositions of the bead portions, e.g. clinch or chafer rubber or cushion rubber
B60C 2001/0058
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
1Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
005Compositions of the bead portions, e.g. clinch or chafer rubber or cushion rubber
0058Compositions of the bead apexes
B60C 2015/0617
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips ; and reinforcing layers for the construction of the bead
0617comprising a cushion rubber other than the chafer or clinch rubber
Applicants
  • COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR]/[FR]
Inventors
  • SCHOENHENZ, Olivier
  • BUFFETAUD, Benoit
  • SALGUES, Nathalie
Agents
  • LE CAM, Stéphane
Priority Data
185862324.09.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) TYRE WITH CARCASS REINFORCEMENT REINFORCED BY A LAYER OF REINFORCING ELEMENTS IN THE BEAD REGION
(FR) PNEUMATIQUE DONT L'ARMATURE DE CARCASSE EST RENFORCEE PAR UNE COUCHE D'ELEMENTS DE RENFORCEMENT DANS LA ZONE DU BOURRELET
Abstract
(EN)
The invention relates to a tyre (1) having a radial carcass reinforcement (2) that is made up of at least one layer of reinforcing elements anchored in each of the beads (3) by being turned up around a bead wire (4), said carcass reinforcement turn-up being reinforced by at least one layer of reinforcing elements or stiffeners (8). According to the invention, the reinforcing elements of at least one stiffener (8) are non-wrapped metal cords with saturated layers having a flow rate of less than 5 cm3/min in the permeability test, and at least one layer of elastomer blend present at least partially in the surface of a region S, in a radial plane, is an elastomer blend based on natural rubber or on synthetic polyisoprene and on a reinforcing filler that provides increased cohesion.
(FR)
L'invention concerne un pneumatique (1) à armature de carcasse radiale (2), constituée d'au moins une couche d'éléments de renforcement ancrée dans chacun des bourrelets (3) par retournement autour d'une tringle (4), ledit retournement d'armature de carcasse étant renforcé par au moins une couche d'éléments de renforcement ou raidisseur (8). Selon l'invention, les éléments de renforcement d'au moins un raidisseur (8) sont des câbles métalliques non frettés à couches saturées présentant au test dit de perméabilité un débit inférieur à 5 cm3/min et au moins une couche de mélange élastomérique présente au moins partiellement dans la surface d'une zone S, dans un plan méridien, est un mélange élastomérique à base de caoutchouc naturel ou de polyisoprène synthétique et d'une charge renforçante conférant une cohésion élevée.
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