{
  "$type": "site.standard.document",
  "description": "A pneumatic tire includes a tread portion and sidewall portions, an outermost layer of the tread portion is formed by using a rubber composition, which contains vulcanized rubber powder and has a loss tangent (0°C tan8) of less than 0.23 as measured under conditions of 0°C, a frequency of 10 Hz, an…",
  "path": "/patents/1403270",
  "publishedAt": "2024-09-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tire includes a tread portion and sidewall portions, an outermost layer of the tread portion is formed by using a rubber composition, which contains vulcanized rubber powder and has a loss tangent (0°C tan8) of less than 0.23 as measured under conditions of 0°C, a frequency of 10 Hz, an initial strain of 5%, and a dynamic strain rate of 1% with deformation mode: tension, such that an area ratio Sr (%) of the vulcanized rubber powder in a cross-section of the outermost layer of the tread portion is not less than 5% and not greater than 50%, each sidewall portion is formed such that a thickness G (mm) thereof is not less than 1.0 mm, and the following formula 1 is satisfied. Sr / G > 0.5",
  "title": "PNEUMATIC TIRE"
}