{
  "$type": "site.standard.document",
  "description": "Provided is a microporous polyolefin multilayer film which may be used as a separator for a battery, and a method for preparing the same. At least one layer of the microporous polyolefin multilayer film contains 90-100 wt% of polyethylene having a melting temperature of 130¼140 °C and at least the…",
  "path": "/patents/1005176",
  "publishedAt": "2012-02-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D69/02",
    "SK INNOVATION CO LTD [KR]"
  ],
  "textContent": "Provided is a microporous polyolefin multilayer film which may be used as a separator for a battery, and a method for preparing the same. At least one layer of the microporous polyolefin multilayer film contains 90-100 wt% of polyethylene having a melting temperature of 130¼140 °C and at least the other layer has 20 wt% or more of a heat resistant resin and 80 wt% or less of a filler selected from the group consisting of an organic filler, an inorganic filler and a mixture thereof. The heat resistant resin is preferably a semi crystalline polymer or an amorphous polymer. Preferably, the semi crystalline polymer has a degree of crystallinity of 10¼45% or a heat of fusion for melting of 20-90 J/g and has a melting temperature of 145¼250 °C and a glass transition temperature of -100¼90 °C . Also, preferably, the amorphous polymer has no crystal and has a glass transition temperature of 90¼120 °C.",
  "title": "POLYOLEFIN-BASED MULTILAYER MICROPOROUS FILM WITH EXCELLENT PHYSICAL PROPERTIES AND HIGH TEMPERATURE STABILITY"
}