{
  "$type": "site.standard.document",
  "description": "Provided is a tire () including a tread rubber layer () and belt layers (A, B) located inward of the tread rubber layer () in the tire radial direction. The tread rubber layer () includes a rubber component, a resin component, and a filler. The rubber component includes an isoprene skeleton rubber…",
  "path": "/patents/1389504",
  "publishedAt": "2026-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C08L15/00",
    "BRIDGESTONE CORPORATION"
  ],
  "textContent": "Provided is a tire () including a tread rubber layer () and belt layers (A, B) located inward of the tread rubber layer () in the tire radial direction. The tread rubber layer () includes a rubber component, a resin component, and a filler. The rubber component includes an isoprene skeleton rubber and a styrene-butadiene rubber having a glass transition temperature of less than −40° C. The resin component has a difference of the SP value relative to that of the isoprene skeleton rubber of 1.40 (cal/cm)or less. The tread rubber layer () satisfies the formula: mass ratio of the resin component/isoprene skeleton rubber ≥0.5. The belt layers (A, B) include cords formed by twisting filaments satisfying, when the diameter of the filaments is X (mm) and the tensile strength of the filaments is Y (MPa), 4000−2000X≤Y≤4500−2000X.",
  "title": "TIRE"
}