Waved-shaped, curled steel cord for reinforcing rubber articles

Details Waved-shaped, curled steel cord for reinforcing rubber articles Waved-shaped, curled steel cord for reinforcing rubber articles

1996-06-26

1997-03-04

Stryjewski, William

Textiles: spinning, twisting, and twining

Strand structure

Longitudinal variation

57210, 57212, 57311, 57902, D02G 302, D02G 336

Patent

active

056068522

ABSTRACT:
A steel cord for reinforcing rubber articles and a pneumatic radial tire having a belt layer using the same, in which the steel cord comprises a core made of a steel filament wave-shaped in a plane (crimped) and turned (curled) and 5-8 sheath filaments wound around the core in the same direction as the turn direction of the core. The wavelength .lambda.c of the core is preferably defined as 8 dc.ltoreq..lambda.c.ltoreq.30 dc when the diameter of the core filament is dc, and the turn-number nc of the core around the center axis of the core per one wave-length of the core is preferably defined as 0.12.ltoreq.nc.ltoreq.0.85 (turn/pitch).

REFERENCES:
patent: 5295346 (1994-03-01), Bundo et al.
patent: 5319915 (1994-06-01), Kobayashi et al.
patent: 5351470 (1994-10-01), Shinmura
Research Disclosure, No. 175, Nov. 1978, Emsworth GB, pp. 26-28 17534 `Process for the manufacture of a strand, as well as a strand made according to this process, and elastomer or synthetic material objects reinforceed with such strands`.

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