Title:
PNEUMATIC TIRE
Document Type and Number:
Japanese Patent JP2023069260
Kind Code:
A
Abstract:
To provide a pneumatic tire which restricts scattered reflection of light due to a surface protective film at side wall parts, maintains an exterior appearance in a matting state for a long period of time and uses coloring to prevent the fine appearance from being impaired, and further, reduces occurrences of cracking on the surface protective film.SOLUTION: Provided is a pneumatic tire with side wall parts. The side wall part includes a protrusion formation part on which a plurality of micro-protrusions are formed on its external surface. A height of the micro-protrusion is 0.5 mm or less. The protrusion formation part has an area of 10 mm2 or more. In at least one direction, 20 micro-protrusions or more are formed at an interval of 0.5 mm or less. In the pneumatic tire, in a 25°C environment of the side wall parts, M300/M100 of a stress M100 at a tensile strain 100% and a stress M300 at a tensile strain 300% in a tensile test at a tension speed 500 mm/min is greater than 4.0, and 70°Ctanδ is 0.09 or less.SELECTED DRAWING: Figure 1A
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Inventors:
MATSUMOTO NORIHIRO
Application Number:
JP2021181008A
Publication Date:
May 18, 2023
Filing Date:
November 05, 2021
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B60C3/04; B60C13/00
Attorney, Agent or Firm:
Tetsushi Kamidai
Naomi Jinno
Satoshi Shimizu
Naomi Jinno
Satoshi Shimizu