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Title:
MULTI-STRAND CORD IN WHICH THE BASIC STRANDS ARE DUAL LAYER CORDS, RUBBERISED IN SITU
Document Type and Number:
WIPO Patent Application WO/2011/000963
Kind Code:
A3
Abstract:
The invention relates to a multi-strand metal cord (C-1) having two layers (Ci, Ce) with a J+K construction, in particular for reinforcing the tyres of industrial vehicles, consisting of a core comprising J strand(s) forming an inner layer (Ci), J varying from 1 to 4, K outer strands being helically wound around said core at a pitch Pκ of 20 to 70 mm, forming an outer layer (Ce) around said inner layer (Ci), each outer strand: comprising a cord (10) with two layers (C1, C2) with an L+M construction, rubberised in situ, comprising an inner layer (C1) consisting of L wires (11) with a diameter d1, L varying from 1 to 4, and an outer layer (C2) of M wires (12), M being no lower than 5, having a diameter d2 helically wound together at a pitch p2 around the inner layer (C1); and having the following characteristics (d1, d2 and p2 being given in mm): - 0.10 < d1 < 0.50; - 0.10 < d2 < 0.50; - 6 < p2 < 30; the inner layer (C1) thereof is sheathed by a rubber composition (14) referred to as “filling rubber”; along the entire length of the outer strand (10) equal to Pκ, the filling rubber (14) is present in each of the capillaries (15) delimited by the L wires (11) of the inner layer (C1) and the M wires (12) of the outer layer (C2) and, when L is equal to 3 or 4, the rubber is present in the central channel (13) delimited by the L wires (11) of the inner layer (C1); and the level of filling rubber in said outer strand is 5 to 40 mg/g of strand.

Inventors:
BOISSEAU, Sandra (9 Chemin de la Buyre, Chappes, F-63720, FR)
BARGUET, Henri (2 Impasse du Meunier, Les Martres D'Artière, F-63430, FR)
POTTIER, Thibaud (9 rue Maurice Weiss, Clermont-Ferrand, F-63000, FR)
Application Number:
EP2010/059524
Publication Date:
March 03, 2011
Filing Date:
July 05, 2010
Export Citation:
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Assignee:
SOCIETE DE TECHNOLOGIE MICHELIN (23 rue Breschet, Clermont-Ferrand, Clermont-Ferrand, F-63000, FR)
MICHELIN RECHERCHE ET TECHNIQUE S.A. (Route Louis Braille 10, Granges-Paccot, CH-1763, CH)
BOISSEAU, Sandra (9 Chemin de la Buyre, Chappes, F-63720, FR)
BARGUET, Henri (2 Impasse du Meunier, Les Martres D'Artière, F-63430, FR)
POTTIER, Thibaud (9 rue Maurice Weiss, Clermont-Ferrand, F-63000, FR)
International Classes:
D07B1/06; D07B1/16; D07B7/14
Domestic Patent References:
WO2009011397A1
WO2009080583A1
WO2010012411A1
Foreign References:
JPH0754286A
JP2009024268A
FR2925922A1
FR2925923A1
Attorney, Agent or Firm:
RIBIERE, Joël (Manufacture Française des Pneumatiques Michelin, 23 place des Carmes-Déchau, SGD/LG/PI - F35 - Ladoux Clermont-Ferrand Cedex 9, F-63040, FR)
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