| abstract |
Multistrand metal cord (C- 1 ) having two layers (Ci, Ce) of J+K construction, which can especially be used for reinforcing tires for industrial vehicles, consisting of a core comprising J strands forming an inner layer (Ci), J varying from 1 to 4, around which core are wound, in a helix, with a helix pitch P K of between 20 and 70 mm, K outer strands forming an outer layer (Ce) around said inner layer (Ci), each outer strand: comprising a cord ( 10 ) having two layers (C 1, C 2 ) of L+M construction, rubberized in situ, comprising an inner layer (C 1 ) comprised of L wires ( 11 ) of diameter d 1 , L varying from 1 to 4, and an outer layer (C 2 ) of M wires ( 12 ), M being equal to or greater than 5, of diameter d 2 , which are wound together in a helix with a pitch p 2 around the inner layer (C 1 ); and having the following characteristics (d 1 , d 2 and p 2 being expressed in mm): 0.10<d 1 <0.50; 0.10<d 2 <0.50; 6<p 2 <30; its inner layer (C 1 ) is sheathed with a rubber composition ( 14 ) called a “filling rubber”; over any length of the outer strand ( 10 ) equal to P K , the filling rubber ( 14 ) is present in each of the capillaries ( 15 ) delimited by the L wires ( 11 ) of the inner layer (C 1 ) and the M wires ( 12 ) of the outer layer (C 2 ), and also, when L is equal to 3 or 4, in the central channel ( 13 ) delimited by the L wires ( 11 ) of the inner layer (C 1 ); the amount of filling rubber in said outer strand is between 5 and 40 mg per g of strand. |