Title:
空気入りタイヤ
Document Type and Number:
Japanese Patent JP7415130
Kind Code:
B2
Abstract:
To provide a pneumatic tire capable of further reducing road noise derived from the tire, while enhancing steering stability, as well as, preventing air leakage, which cannot be achieved simultaneously by a conventional method of softening the cap tread rubber.SOLUTION: A pneumatic tire has: an inner liner rubber thickness of 0.3 to 20 mm; a ratio, 50 parts or more, of a butyl-based rubber to 100 parts of rubbers that constitute an inner liner rubber; a ratio, 30 parts or more, of a carbon black having a nitrogen adsorption specific surface area of 25 to 100 m2/g, to 100 parts of the rubbers that constitute the inner liner rubber; and hardness values (Hs cap) and (Hs IL) of a cap tread rubber and the inner liner rubber at 20°C, and gas permeation coefficients (permeation coefficient cap) and (permeation coefficient IL) of the cap tread rubber and the inner liner rubber that satisfy the following formulae: 0.7≤(Hs cap)/(Hs IL)≤1.7; and 2.5≤(transmission coefficient cap)/(transmission coefficient IL)≤7.5.SELECTED DRAWING: None
More Like This:
Inventors:
Hirokazu Shibata
Hiroki Sugiura
Katsunori Shimizu
Hiroki Sugiura
Katsunori Shimizu
Application Number:
JP2019193489A
Publication Date:
January 17, 2024
Filing Date:
October 24, 2019
Export Citation:
Assignee:
Yokohama Rubber Co., Ltd.
International Classes:
B60C5/14; B60C11/00; C08K3/013; C08K3/04; C08L9/00
Domestic Patent References:
| JP2007119614A | ||||
| JP2018193567A | ||||
| JP2018178007A | ||||
| JP2008150523A | ||||
| JP2009024100A | ||||
| JP2016078734A | ||||
| JP7117407A | ||||
| JP2003039913A | ||||
| JP2021172251A | ||||
| JP2015189833A |
Foreign References:
| DE102019203136A1 |
Attorney, Agent or Firm:
Shigeru Noda