Rubber article-reinforcing 2+8 steel cords and pneumatic tires u

Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube

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57902, 152527, B60C 918, B60C 920, D07B 108

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active

052136400

ABSTRACT:
A steel cord comprising a core and a sheath arranged around the core. The core consists of two steel filaments, and the sheath consists of eight steel filaments. The diameter of each of the filaments is in a range from 0.30 to 0.42 mm, and a difference D.sub.c -D.sub.s between the diameter D.sub.c of the filaments of the core and that D.sub.s of the sheath is not less than 0.04 mm. The twisted direction of the core is the same as that of the sheath, and a ratio P.sub.s /P.sub.c between a pitch P.sub.s of the sheath and that of P.sub.c of the core is in a range from 1.4 to 3.0.

REFERENCES:
patent: 4349063 (1982-09-01), Kikuchi et al.
patent: 4543298 (1985-09-01), Riedl
patent: 4690191 (1987-09-01), Kawasaki
patent: 4732197 (1988-03-01), Heishi et al.
patent: 4783955 (1988-11-01), Uchio
patent: 4917165 (1990-04-01), Umezawa
"New developments in steel cords for tyres", International Polymer Science and Technology, vol. 11, No. 10, 1984, pp. T/53-T/60.

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