Multilayer steel cable for a tire carcass

Details Multilayer steel cable for a tire carcass Multilayer steel cable for a tire carcass

D - Textiles, Paper

07

B

D07B 1/06 (2006.01)

Patent

CA 2395899

The invention relates to a multilayer cable with an unsaturated outer layer for use as an element for reinforcing the frame of a tire carcass, comprising a core which has a diameter d¿0? and which is surrounded by an intermediate layer (C1). Said intermediate layer consists of 4 or 5 wires (M = 4 or 5) which have a diameter d¿1? and which are wound together in a spiral according to a lay p¿1?. Said layer (C1) is itself surrounded by an outer layer (C2) consisting of N wires which have a diameter d¿2? and which are wound together in a spiral according to a lay p¿2?, N being less than the maximum number N¿max? of wires that can be wound around the layer (C1) in a spiral by 1 to 3. The cable has the following characteristics (d¿0?, d¿1?, d¿2?, p¿1? and p¿2? in mm): (i) 0,08 < d¿0? < 0,28; (ii) 0,15 < d¿1? < 0,28; (iii) 0,12 < d¿2? <0,25; (iv) for M = 4: 0,40 < (d¿0?/d¿1?) < 0,80; for M = 5: 0,70 < (d¿0?/d¿1?) < 1,10; (v) 4,8.pi. (d¿0? + d¿1?) < p¿1? < p¿2? < 5,6.pi. (d¿0? + 2d¿1? + d¿2?); (vi) the wires of layers (C1) and (C2) being wound in the same direction of twist. The invention also relates to plastic and/or rubber items or semi-finished products which are reinforced by a multilayer cable of this type, especially tires for industrial vehicles, especially heavy vehicles tires and their carcass belts.

Câble multicouches à couche externe insaturée, utilisable comme élément de renforcement d'une armature de carcasse de pneumatique, comportant une âme de diamètre d¿0? entourée d'une couche intermédiaire (notée C1) de quatre ou cinq fils (M=4 ou 5) de diamètre d¿1? enroulés ensemble en hélice selon un pas p¿1?, cette couche C1 étant elle-même entourée d'une couche externe (notée C2) de N fils de diamètre d¿2? enroulés ensemble en hélice selon un pas p¿2?, N étant inférieur de 1 à 3 au nombre maximal N¿max? de fils enroulables en une couche autour de la couche C1, ce câble présentant les caractéristiques suivantes (d¿0?, d¿1?, d¿2?, p¿1? et p¿2? en mm): (i) 0,08<d¿0?<0,28; (ii) 0,15<d¿1?<0,28; (iii) 0,12<d¿2?<0,25; (iv) pour M=4: 0,40<(d¿0?/d¿1?)<0,80; pour M=5: 0,70<(d¿0?/d¿1?)<1,10; (v) 4,8 <(d¿0?+d¿1?)<p¿1?<p¿2?<5,6 .pi.(d¿0?+2d¿1?+d¿2?); (vi) les fils des couches C1 et C2 sont enroulés dans le même sens de torsion. L'invention concerne en outre les articles ou produits semi-finis en matière plastique et/ou en caoutchouc renforcés par un tel câble multicouches, notamment les pneumatiques destinés aux véhicules industriels, plus particulièrement les pneumatiques Poids-lourds et leurs nappes d'armature de carcasse.

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