Title:
HEAVY-LOAD RADIAL TIRE
Document Type and Number:
WIPO Patent Application WO/1988/009840
Kind Code:
A1
Abstract:
This invention relates to a heavy-load radial tire wherein metal cords having a single twist structure obtained by twisting 3 to 5 metal filaments having a filament diameter of 0.13 to 0.32 mm, and having an arithmetic-mean of elongations P1, 0.35 to 1.0 %, in the range of a load of 0.25 to 5 kgf/piece are disposed as a carcass ply in such a manner that the cord gap at the end portion of the carcass ply is at least 0.25 mm. This arrangement makes it possible to reduce drastically the tie weight, to avoid problems with workability for loose bead and the like, to improve breakage resistance at the end portion of the carcass ply, corrosion and fatigue resistance and anti-fretting property. At the same time, it is possible to improve drastically side scratch resistance of the radial tire (anti-cord break property). The radial tire of the invention may be designed to satisfy a specific relationship between the tensile strength TS of the metal filament and the filament diameter d in the range where load index in accordance with ISO 4209/1 is 121 or below and 122 or above so as to further improve various properties described above.
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Inventors:
Kawasaki
Kiyohito, Umezawa
Yujiro, Sugawara
Toshio
Kiyohito, Umezawa
Yujiro, Sugawara
Toshio
Application Number:
PCT/JP1988/000231
Publication Date:
December 15, 1988
Filing Date:
March 01, 1988
Export Citation:
Assignee:
BRIDGESTONE CORPORATION KAWASAKI
Kiyohito, Umezawa
Yujiro, Sugawara
Toshio
Kiyohito, Umezawa
Yujiro, Sugawara
Toshio
International Classes:
B60C9/00; D07B1/06; (IPC1-7): D07B1/06
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