Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2023/032062
Kind Code:
A1
Abstract:
Provided is a pneumatic tire that has substantially improved crack resistance performance and durability performance. According to the present invention, a pneumatic tire has a tread part that has grooves in the surface thereof and comprises a first rubber composition that forms bottom parts of the grooves and a second rubber composition that is adjacent to the first rubber composition further to the inside in the tire radial direction than the bottom parts of the grooves. When the acetone-extractable fraction of the first rubber composition and the acetone-extractable fraction of the second rubber composition are, respectively, E1 mass% and E2 mass%, (E1-E2)<20, and when the cross-sectional width of the tire, the outer diameter of the tire, and the volume of the space occupied by the tire when the tire is mounted on a standard rim at an internal pressure of 250 kPa are, respectively, Wt (mm), Dt (mm), and a virtual volume V (mm3), the tire satisfies expression (1) and expression (2). (1) 1700≤(Dt2×π/4)/Wt≤2827.4
(2) [(V+1.5×107)/Wt]≤2.88×105
Inventors:
HAMAMURA KENJI (JP)
KAWAI HIROKI (JP)
TOYA SUBARU (JP)
KAWAI HIROKI (JP)
TOYA SUBARU (JP)
Application Number:
PCT/JP2021/032035
Publication Date:
March 09, 2023
Filing Date:
September 01, 2021
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
B60C3/00; B60C3/04; B60C11/00
Domestic Patent References:
| WO2018186367A1 | 2018-10-11 |
Foreign References:
| JP2005067236A | 2005-03-17 | |||
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Other References:
TOA SYNTHETIC RESEARCH ANNUAL REPORT TREND2000, vol. 3, pages 42 - 45
Attorney, Agent or Firm:
JODAI Tetsuji et al. (JP)
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