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1. (WO2017037226) PNEUMATIC TIRE COMPRISING LOW-CARBON CARCASS REINFORCING CORDS AND HAVING REDUCED THICKNESSES OF RUBBER MIXTURES
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Pub. No.: WO/2017/037226 International Application No.: PCT/EP2016/070704
Publication Date: 09.03.2017 International Filing Date: 02.09.2016
IPC:
B60C 9/00 (2006.01) ,B60C 9/02 (2006.01) ,B60C 1/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
C
VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
9
Reinforcements or ply arrangement of pneumatic tyres
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
C
VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
9
Reinforcements or ply arrangement of pneumatic tyres
02
Carcasses
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
C
VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
1
Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
Applicants:
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR/FR]; 12, Cours Sablon 63000 Clermont-Ferrand, FR
Inventors:
VERLEENE, Arnaud; FR
JOULIN, Emmanuel; FR
Agent:
LE CAM, Stéphane; FR
Priority Data:
15/5820304.09.2015FR
Title (EN) PNEUMATIC TIRE COMPRISING LOW-CARBON CARCASS REINFORCING CORDS AND HAVING REDUCED THICKNESSES OF RUBBER MIXTURES
(FR) PNEUMATIQUE COMPORTANT DES CABLES D'ARMATURES DE CARCASSE PRESENTANT UN BAS TAUX DE CARBONE ET DES EPAISSEURS DE MELANGES CAOUTCHOUTEUX REDUITES
Abstract:
(EN) The invention relates to a pneumatic tire (1) having a radial carcass reinforcement (2) consisting of at least one ply of metal reinforcement elements, said pneumatic tire comprising a top reinforcement (5) which is radially covered with a tread (6), said tread being joined to two beads (4) via two sidewalls. According to the invention, the metal reinforcement elements of at least one ply of the carcass reinforcement are cords consisting of a plurality of steel wires that have a percentage by weight of carbon C of 0.01% < C < 0.4%, said wires having a maximum flow rate of 20 cm3/min in the permeability test; furthermore, the thickness of the rubber mixture between the inner surface of the tire cavity and that point of a metal reinforcement element of the carcass reinforcement which is closest to said inner surface of the tire cavity is less than 3.2 mm, and the steel wires have a tensile strength R, in MPa, such that R > 175 + 930.C - 600.1n(d) and R > 1500 MPa.
(FR) L'invention concerne un pneumatique (1) à armature de carcasse radiale (2), constituée d'au moins une couche d'éléments de renforcement métalliques, ledit pneumatique comprenant une armature de sommet (5), elle-même coiffée radialement d'une bande de roulement (6), ladite bande de roulement étant réunie à deux bourrelets (4) par l'intermédiaire de deux flancs. Selon l'invention, les éléments de renforcement métalliques d'au moins une couche de l'armature de carcasse sont des câbles constitués de plusieurs fils d'acier présentant un taux de carbone en masse C tel que 0.01 % < C < 0.4 %, lesdits câbles présentant au test dit de perméabilité un débit inférieur ou égal à 20 cnr/mn, l'épaisseur de mélange caoutchouteux entre la surface intérieure de la cavité du pneumatique et le point d'un élément de renforcement métallique de l'armature de carcasse le plus proche de la dite surface intérieure de la cavité étant inférieure à 3.2 mm et lesdits fils d'acier présentent une contrainte maximale avant rupture R, exprimée en MPa, telle que R > 175 + 930.C - 600.1n(d) et R > 1500 MPa.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)