{
  "$type": "site.standard.document",
  "description": "It is an object of the present invention to provide a heavy-duty tire with improved chipping resistance on a surface of a rough road. Provided is a heavy-duty tire (1) comprising a tread part (2) that comprises a first layer (4) constituting a tread surface, and a second layer (5) located inside…",
  "path": "/patents/1394781",
  "publishedAt": "2025-09-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "It is an object of the present invention to provide a heavy-duty tire with improved chipping resistance on a surface of a rough road. Provided is a heavy-duty tire (1) comprising a tread part (2) that comprises a first layer (4) constituting a tread surface, and a second layer (5) located inside the first layer, wherein the tread surface comprises a plurality of main grooves (7, 8) extending continuously in a tire circumferential direction, lateral grooves (9) extending from the plurality of main grooves in a tire axial direction, and blocks (10) partitioned off by the main grooves and the lateral grooves, wherein the each of the blocks comprises a sipe (11), wherein, when a depth (mm) of the sipe is referred to as D and a thickness (mm) of the first layer is referred to as H, D and H satisfy the following inequality, D / H ≤ 0.95 (1), and wherein a rubber composition constituting the first layer comprises a rubber component comprising an isoprene-based rubber, and a filler comprising carbon black and silica.",
  "title": "HEAVY-DUTY TIRE"
}