TIRE REINFORCING STEEL CORD AND TIRE

WIPO Patent Application WO/2002/079567

A1

A (1 x n)-structure tire reinforcing steel cord which is installed by being wound at opposite side edges of the belt portion of the tire, and formed by twisting 4 to 7 strands each having a wire size of 0.20-0.45 mm, the cord having a spiral/planar waveform permanency, an elongation factor being 1.2-2.0% under a tensile load of 50 N in a tensile test based on JIS B 7721, a tensile load ranging from 50 to 250 N when the cord is linearized. The cord elongates properly by following up the expansion of the tire at tire building, and, after built, has a small elongation characteristic to thereby restrict a radial expansion caused by the high-speed continuous rotation of the tire.

Morioka, Noritaka (1-18-2, Daido-cho Akashi-shi, Hyogo, 673-0029, JP)
Harikae, Sinya c/o The Yokohama Rubber Co. Ltd. (Hiratsuka Factory 2-, Oiwake Hiratsuka-shi Kanagawa, 254-8601, JP)

PCT/JP2002/003090

October 10, 2002

March 28, 2002

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TOKUSEN KOGYO CO., LTD. (1081, Minamiyama Sumiyoshi-cho Ono-shi, Hyogo, 675-1361, JP)
THE YOKOHAMA RUBBER CO., LTD. (36-11, Shinbashi 5-chome Minato-ku, Tokyo, 105-8685, JP)
Morioka, Noritaka (1-18-2, Daido-cho Akashi-shi, Hyogo, 673-0029, JP)
Harikae, Sinya c/o The Yokohama Rubber Co. Ltd. (Hiratsuka Factory 2-, Oiwake Hiratsuka-shi Kanagawa, 254-8601, JP)

B60C9/00; B60C9/20; B60C9/22; D07B1/06; B60C9/00; B60C9/20; B60C9/22; D07B1/00; (IPC1-7): D07B1/06

Ochiai, Takeshi (TO Building 6-3, Taito 2-chome Taito-ku, Tokyo, 110-0016, JP)

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