{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "The present invention addresses the problem of providing a microporous polyolefin film which is superior in output characteristics and strength to conventional ones. A first aspect of the present invention relates to a microporous polyolefin film which satisfies the relationship [Y (N)] ≥…",
  "path": "/patents/1413307",
  "publishedAt": "2024-12-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C08J5/18",
    "TORAY INDUSTRIES [JP]"
  ],
  "textContent": "The present invention addresses the problem of providing a microporous polyolefin film which is superior in output characteristics and strength to conventional ones. A first aspect of the present invention relates to a microporous polyolefin film which satisfies the relationship [Y (N)] ≥ [-6.7×10-3×(X(/µm3))+4.5] where Y (N) is the piercing strength in terms of 10-µm film thickness and X (/µm3) is the number of pores per unit volume, the number of pores X being 40 /µm3 or larger.",
  "title": "MICROPOROUS POLYOLEFIN FILM, SEPARATOR FOR BATTERY, SECONDARY BATTERY, AND METHOD FOR PRODUCING MICROPOROUS POLYOLEFIN FILM"
}