| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel cord which is used for reinforcing rubber products, can reduce production cost, has good rubber material invasiveness, is little extended with low loads, and has a two-layered structure. SOLUTION: The method for producing the steel cord 10 comprises forming spiral curls on all core strands 11, pressing the product to form smaller pitch approximately sine wave-like curls than pitches for twisting in an approximately sine wave-like shape, simultaneously twisting the core strands 11 with side strands 12 to form a bundle-twisted two-layered structure, and then pressing the product in the direction crossing the longitudinal direction of the cord. Thus, in the cord 10, the core strands 11 contact with each other at any places in the longitudinal direction of the cord, and are discontinuously arranged in the longitudinal direction of the cord to partially contact in approximate parallel. COPYRIGHT: (C)2009,JPO&INPIT |
