{
  "$type": "site.standard.document",
  "description": "Provided are: a separator for an electric power storage device, the separator having high liquid absorption and high strength; and an electric power storage device in which the separator is used. The separator for an electric power storage device includes a microporous membrane (A) containing an…",
  "path": "/patents/1388663",
  "publishedAt": "2026-04-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01G11/52",
    "ASAHI CHEMICAL IND [JP]"
  ],
  "textContent": "Provided are: a separator for an electric power storage device, the separator having high liquid absorption and high strength; and an electric power storage device in which the separator is used. The separator for an electric power storage device includes a microporous membrane (A) containing an inorganic filler and a polyolefin resin. The microporous membrane (A) has a MFR of 0.05-5 inclusive, includes not less than 20 mass% but less than 100 mass% of the organic filler, has an average pore diameter of 100-1500 nm inclusive for the pores in a cross-section ND-MD, and has an air permeability of 340 sec/100 mL or less.",
  "title": "SEPARATOR FOR ELECTRIC POWER STORAGE DEVICE, AND ELECTRIC POWER STORAGE DEVICE IN WHICH SAME IS USED"
}