{
  "$type": "site.standard.document",
  "description": "Provided is a pneumatic tire () including a tread rubber layer () and a carcass ply () formed by covering PET fiber cords with a coating rubber. The tread rubber layer () includes a rubber component, a resin component, and a filler. The rubber component includes an isoprene skeleton rubber and a…",
  "path": "/patents/1385267",
  "publishedAt": "2026-06-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C9/04",
    "BRIDGESTONE CORPORATION"
  ],
  "textContent": "Provided is a pneumatic tire () including a tread rubber layer () and a carcass ply () formed by covering PET fiber cords with a coating rubber. 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. The glass transition temperature of at least one type of the styrene-butadiene rubber is lower 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 formula (1): mass ratio of resin component/isoprene skeleton rubber ≥0.5. The carcass ply () has a total gauge of 1.2 mm or less. The carcass ply () satisfies formula (2): (A/B)/total fiber fineness ≥0.3.",
  "title": "PNEUMATIC TIRE"
}