{
  "$type": "site.standard.document",
  "description": "A pneumatic tyre includes a tread portion having a tread rubber and a tyre inner cavity surface, and a noise damper made of a porous material fixed to the tyre inner cavity surface. The tread rubber includes an outer tread rubber having a ground-contacting surface, and an inner tread rubber…",
  "path": "/patents/1399306",
  "publishedAt": "2025-01-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/00",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tyre includes a tread portion having a tread rubber and a tyre inner cavity surface, and a noise damper made of a porous material fixed to the tyre inner cavity surface. The tread rubber includes an outer tread rubber having a ground-contacting surface, and an inner tread rubber disposed inwardly in the tyre radial direction of the outer tread rubber and outwardly in the tyre radial direction of the noise damper. A loss tangent tan δ of the inner tread rubber at 30 degrees C is smaller than a loss tangent tan δ of the outer tread rubber at 30 degrees C.",
  "title": "PNEUMATIC TYRE"
}