Title:
PNEUMATIC RADIAL TIRE
Document Type and Number:
WIPO Patent Application WO/2020/162597
Kind Code:
A1
Abstract:
Provided is a pneumatic radial tire having a belt cover layer made of an organic fiber cord, which can improve durability while effectively reducing road noise. A belt layer 7 disposed on the outer peripheral side of a carcass layer 4 in a tread part 1 is configured by a steel cord 7C having a 1 × M structure including M wires 7s, the number M of the wires 7s is set to 1 to 6, the tensile elastic modulus of the steel cord 7C under a load of 5-50 N is set to 130 GPa or more, the steel cords 7C are arranged to be inclined with respect to a tire circumferential direction so as to intersect with each other between the belt layers 7, a belt cover layer 8 disposed on the outer peripheral side of the belt layer 7 is configured by an organic fiber cord having an elongation of 2.0% to 4.0% under a load of 2.0 cN/dtex, and the organic fiber cord is spirally wound along the tire circumferential direction.
Inventors:
SUZUKI ASUKA (JP)
HARIKAE SHINYA (JP)
HARIKAE SHINYA (JP)
Application Number:
PCT/JP2020/004822
Publication Date:
August 13, 2020
Filing Date:
February 07, 2020
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B60C9/00; B60C9/20; B60C9/22
Domestic Patent References:
| WO2008035771A1 | 2008-03-27 |
Foreign References:
| JP2002154304A | 2002-05-28 | |||
| JP2004224277A | 2004-08-12 | |||
| JPS5682608A | 1981-07-06 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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