Title:
TIRE
Document Type and Number:
WIPO Patent Application WO/2022/102453
Kind Code:
A1
Abstract:
Provided is a tire that exhibits excellent overall performance in terms of maneuvering stability on a wet road surface when worn out and maneuvering stability on an icy road surface when worn out. The present disclosure pertains to a tire having a tread part. The tread part has formed therein at least one main groove that continuously extends in the tire circumferential direction. The tread part is composed of a rubber that has a hardness at 60°C of at least 58 and a hardness at 0°C of being not more than 115% of the hardness at 60°C. When the sea ratio on the tread surface of a brand-new tire is denoted by S0 (%), and the sea ratio at a time when the tread has been worn until the depth of the main groove is reduced to 50% of that of the brand-new tire is denoted by S50 (%), S50/S0>1 is satisfied.
Inventors:
ONO SHUICHIRO (JP)
Application Number:
PCT/JP2021/040243
Publication Date:
May 19, 2022
Filing Date:
November 01, 2021
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
B60C1/00; B60C11/00; B60C11/03; B60C11/13
Domestic Patent References:
| WO2020189100A1 | 2020-09-24 | |||
| WO2016039005A1 | 2016-03-17 |
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| JP2019099656A | 2019-06-24 | |||
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Other References:
N. MORI ET AL.: "Temperature Induced Changes in the Surface Wettability of SBR+PNIPA Films", MACROMOL. MATER. ENG., vol. 292, no. 917, 2007, pages 917 - 22
"annual research report TREND 2000", vol. 3, TOAGOSEI CO., LTD., pages: 42 - 45
"annual research report TREND 2000", vol. 3, TOAGOSEI CO., LTD., pages: 42 - 45
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
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