{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
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  "description": "A pneumatic tire comprises a carcass extending between bead portions, and a belt disposed radially outside the carcass in the tread portion, at least one of the carcass and belt comprises a PEN cord ply of a polyethylene-2,6-naphthalate fiber cord, the polyethylene-2,6-naphthalate fiber cord having…",
  "path": "/patents/1093738",
  "publishedAt": "2003-08-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C9/0042",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tire comprises a carcass extending between bead portions, and a belt disposed radially outside the carcass in the tread portion, at least one of the carcass and belt comprises a PEN cord ply of a polyethylene-2,6-naphthalate fiber cord, the polyethylene-2,6-naphthalate fiber cord having a total denier number of from 2500 to 3600, a twist number of from 30 to 40 turns/10 cm, an initial stage modulus at 25 deg.C which is in a range of from 50 to 65 gf/d, and a variation of the initial stage modulus in a temperature range between 25 deg.C to 70 deg.C which is not more than 20 % in absolute value.",
  "title": "Pneumatic tire"
}