Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2021/059853
Kind Code:
A1
Abstract:
A pneumatic tire 1 comprising a tread 2. A circumferential direction main groove 12 positioned on the outermost side when attached to the vehicle has a ratio W1/W2 of 0.30–0.75 between a groove width W1 at a position at 90% of the groove depth, when the depth at the bottom of the groove is 100%, and a groove width W2 at the tread surface. The ratio La/Lb, between the length La in the tire 1 circumferential direction C and the sum L between the total length Lb1 of the edge component in the width direction W of the width direction grooves 21, 22, 25, 26 and the total length Lb2 of the edge component in the width direction W of the sipes 23, 24, 27, 28, is 0.10–0.20. A rubber component forming the tread 2 has: a 5°C tan δ of 0.10–0.60; a ｜20°C tan –50° tan δ｜of no more than 0.10; and a 20°C E' of at least 5.0 MPa.
Inventors:
TOMISAKI YUKARI (JP)
KOJIMA RYOJI (JP)
TSUCHIDA TSUYOSHI (JP)
KOJIMA RYOJI (JP)
TSUCHIDA TSUYOSHI (JP)
Application Number:
PCT/JP2020/032438
Publication Date:
April 01, 2021
Filing Date:
August 27, 2020
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
B60C3/04; B60C11/00; B60C11/12; B60C11/13
Domestic Patent References:
| WO2017204354A1 | 2017-11-30 | |||
| WO2019017067A1 | 2019-01-24 |
Foreign References:
| JP2019094007A | 2019-06-20 | |||
| JP2019116574A | 2019-07-18 | |||
| JP2019131756A | 2019-08-08 | |||
| JP2018154749A | 2018-10-04 | |||
| JP2017149897A | 2017-08-31 | |||
| JP2019099062A | 2019-06-24 | |||
| JP2016101803A | 2016-06-02 | |||
| JP2000135904A | 2000-05-16 | |||
| JP2010111753A | 2010-05-20 | |||
| US4414370A | 1983-11-08 | |||
| JPS596207A | 1984-01-13 | |||
| JPH0558005B2 | 1993-08-25 | |||
| JPH01313522A | 1989-12-19 | |||
| US5010166A | 1991-04-23 |
Other References:
JIS K, 2001, pages 6220 - 1
TOAGOSEI, ANNUAL RESEARCH REPORT TREND, vol. 3, 2000, pages 42 - 45
See also references of EP 4043235A4
TOAGOSEI, ANNUAL RESEARCH REPORT TREND, vol. 3, 2000, pages 42 - 45
See also references of EP 4043235A4
Attorney, Agent or Firm:
ASAHINA & CO. (JP)
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