{
  "$type": "site.standard.document",
  "description": "A rubber composition for a tire tread preventing separation of the tread portion from the tire main body, and superior in grip performance and abrasion resistance. The tire tread portion includes a two-layered tread portion having cap rubber at the ground-contact surface side and base rubber at the…",
  "path": "/patents/1069373",
  "publishedAt": "2006-03-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A rubber composition for a tire tread preventing separation of the tread portion from the tire main body, and superior in grip performance and abrasion resistance. The tire tread portion includes a two-layered tread portion having cap rubber at the ground-contact surface side and base rubber at the inner side. The cap rubber has the JIS (K6253) type A hardness of 27 to 43 at 100°C. The base rubber has a thickness (TB) of at least 0.4 mm, and a loss tangent (tan δ) of at least 0.2. The ratio (TC/TB) of the thickness of the cap rubber (TC) to the thickness of the base rubber (TB) is at least 0.45.",
  "title": "Pneumatic tire of a two-wheeled vehicle"
}