Importance

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Abstract

Metal cord (C-1) having two layers (Ci, Ce) of 3+N construction, rubberized in situ, comprising an inner layer (Ci) formed from three core wires (10) of diameter d₁ wound together in a helix with a pitch p₁ and an outer layer (Ce) of N wires (11) N varying from 6 to 12, of diameter d₂, which are wound together in a helix with a pitch p₂ around the inner layer (Ci), wherein said cord has the following characteristics (d₁, d₂, p₁ and p₂ are expressed in mm): 0.201<0.50; 0.202<0.50; p₁/p₂≦1; 51<30; 102<30; the inner layer is sheathed with a diene rubber composition called a “filling rubber” (12) which, for any length of cord of at least 2 cm, is present in the central channel (13) formed by the three core wires and in each of the gaps lying between the three core wires (10) and the N wires (11) of the outer layer (Ce); and the content of filling rubber in the cord is between 5 and 30 mg per g of cord.

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