Cords for reinforcing heavy vehicle tyres

Details Cords for reinforcing heavy vehicle tyres Cords for reinforcing heavy vehicle tyres

D - Textiles, Paper

07

B

D07B 1/06 (2006.01) B60C 9/00 (2006.01) B60C 9/20 (2006.01) B60C 15/06 (2006.01)

Patent

CA 2501392

The invention concerns cords for use for reinforcing a protective crown ply and/or buckle arrestor of tyres for an industrial vehicle such as a heavy vehicle. The invention also concerns composite fabrics for use as protective crown plies and/or buckle arrestors (9) of such tyres, as well as the resulting tyres. The inventive cord (9a) comprises three strands helically wound together with a pitch p2 which consist each of two metallic wires helically wound together with a pitch p1, said wires having diameters (d1, d2), (d1', d2'), (d1", d2") for said strands, respectively, and said cord satisfies the following conditions: (i) 0.25 < d1 <0.45 (ii) 0.25 < d2 < 0.45 (iii) 0.25 < dl' < 0.45 (iv) 0.25 < d2' < 0.45 (v) 0.25 < d 1 " < 0.45 (vi) 0.25 < d2" < 0.45 (vii) 2 < p 1 < p2 < 10

La présente invention concerne des câbles utilisables pour renforcer une nappe sommet de protection et/ou un raidisseur (9) de pneumatiques pour véhicule industriel tel que Poids-lourd. L'invention concerne également des tissus composites utilisables comme nappes de sommets de protection et/ou comme raidisseurs (9) de tels ces pneumatiques, ainsi que ces pneumatiques eux- mêmes. Un câble (9a) selon l~invention comporte trois torons enroulés ensemble en hélice selon un pas p2 qui sont chacun constitués de deux fils métalliques enroulés ensemble en hélice selon un pas p l, ces fils présentant des diamètres (dl, d2), (dl', d2'), (dl", d2") pour lesdits torons, respectivement, et ce cable satisfait aux conditions suivantes (i) 0,25 < d1 <0,45 (ii) 0,25 < d2 < 0,45 (iii) 0,25 < dl' < 0,45 (iv) 0,25 < d2' < 0,45 (v) 0,25 < d 1 " < 0,45 (vi) 0,25 < d2" < 0,45 (vii) 2 < p 1 < p2 < 10.

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