| 摘要 |
A steel cord, for use in the reinforcement of resilient articles such as rubber tyres, comprises a central bundle of wires (1-12) surrounded by a circumferential layer of helicoidally twisted wires (13-26). In the central bundle, one can distinguish a core (1-3) and a surrounding layer (4-12), the latter having the same twist pitch as the circumferential layer (13-26). In order to reduce wire migration, the wires of the central bundle show a limited number of relative position changes, between 2 and 300 per 30 cm cord length. |
