| 摘要 |
PROBLEM TO BE SOLVED: To reduce air column resonance sounds of a tire cavity while restraining increase of a tire mass and restraining temperature rise of the tire due to thermal storage. SOLUTION: A thin groove formation area, in which a plurality of thin grooves 11 extending in a tire axial direction are spaced in a tire peripheral direction, is provided on an inner face 10S of an inner liner layer 10. In the thin grooves 11, a groove wall 12 has an approximately V-shaped cross section having an inclined part 12A inclined at an angleαa of 10-30°relative to a normal of the inner face 10S, and a groove depth Ha is 0.5-1.5 mm. A sound absorbing layer 20 with thickness of 0.2-1.0 mm made of a porous material having porosity of 10μm or less and hole rate of 50% or more and covering at least a thin groove formation area Y, is provided on the inner face 10S. An inner face 20S of the sound absorbing layer 20 is almost parallel to the inner face 10S, and so an indented groove 21 having a same shape as the thin groove 11 is formed on the inner face 20. COPYRIGHT: (C)2009,JPO&INPIT
|
