Title:
TIRE
Document Type and Number:
WIPO Patent Application WO/2021/075256
Kind Code:
A1
Abstract:
The present invention relates to a tire that is installed on a vehicle in a designated orientation, and improves ride comfort during low-temperature traveling while maintaining dry grip and wet grip. A first main groove 11 has a ratio L80/L0 of 0.3 to 0.7, the ratio L80/L0 being the ratio of the groove width L80 at a depth of 80% of the maximum depth and the groove width L0 at the contact area of a tread part 2. The maximum depth of the first main groove 11 is 0.30 to 0.60 times the maximum thickness of the tread part 2. Regarding tanδ of an elastomeric composition at 10 Hz and under the strain condition of a dynamic strain of 2%, –10℃tanδ which is tanδ at –10℃, 40℃tanδ which is tanδ at 40℃, and 70℃tanδ which is tanδ at 70℃ satisfy formulas (1) and (2) below. (1): –10℃tanδ ≤ 0.75 (2): |40℃tanδ – 70℃tanδ| ≤ 0.10
Inventors:
TSUCHIDA TSUYOSHI (JP)
UNNO YUMA (JP)
UNNO YUMA (JP)
Application Number:
PCT/JP2020/036924
Publication Date:
April 22, 2021
Filing Date:
September 29, 2020
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
B60C1/00; B60C5/00; B60C11/00; B60C11/03; B60C11/12; B60C11/13; C08L21/00
Foreign References:
| JP2019094007A | 2019-06-20 | |||
| JP2019116574A | 2019-07-18 | |||
| JP2019131756A | 2019-08-08 | |||
| JP2019099062A | 2019-06-24 | |||
| JP2016113051A | 2016-06-23 | |||
| JP2018154749A | 2018-10-04 | |||
| JP2015128990A | 2015-07-16 | |||
| JP2019094004A | 2019-06-20 | |||
| JP2010111753A | 2010-05-20 | |||
| US4414370A | 1983-11-08 | |||
| JPS596207A | 1984-01-13 | |||
| JPH0558005A | 1993-03-09 | |||
| JPH0313522B2 | 1991-02-22 | |||
| US5010166A | 1991-04-23 |
Other References:
See also references of EP 4043234A4
Attorney, Agent or Firm:
SUMITOMO Shintaro (JP)
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