{
  "$type": "site.standard.document",
  "description": "Provided is a pneumatic tire that has substantially improved crack resistance performance and durability performance; and the pneumatic tire has a tread portion with grooves formed on the surface, the tread portion is formed of a first rubber composition constituting a groove bottom portion, and a…",
  "path": "/patents/1370941",
  "publishedAt": "2024-11-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0008",
    "SUMITOMO RUBBER INDUSTRIES, LTD."
  ],
  "textContent": "Provided is a pneumatic tire that has substantially improved crack resistance performance and durability performance; and the pneumatic tire has a tread portion with grooves formed on the surface, the tread portion is formed of a first rubber composition constituting a groove bottom portion, and a second rubber composition adjacent to the first rubber composition on the inner side of the groove bottom portion in the tire radial direction; and the acetone extractable content of the first rubber composition: E1 (% by mass) and the acetone extractable content of the second rubber composition: E2 (% by mass) satisfy (E1−E2)",
  "title": "PNEUMATIC TIRE"
}