ORGANIC-INORGANIC COMPOSITE MEMBRANE EXCELLENT IN SMOOTHNESS AND MULTI-LAYER HEAT RESISTANT SEPARATOR MATERIAL USING SAME

Provided is an organic-inorganic composite membrane which is to be used for a multi-layer heat resistant separator material, and which achieves a fine balance among smoothness, preservation of microporous property of a substrate film, and adhesion between a substrate and a heat-resistant layer. This...

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Bibliographische Detailangaben
Hauptverfasser: ENOKI, Nobuo, SAKAMOTO, Kazuyuki, FUKUDA, Hirokazu, ITOU, Shingo
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:Provided is an organic-inorganic composite membrane which is to be used for a multi-layer heat resistant separator material, and which achieves a fine balance among smoothness, preservation of microporous property of a substrate film, and adhesion between a substrate and a heat-resistant layer. This organic-inorganic composite membrane has, on at least one side of a substrate film comprising a polyolefin microporous membrane, a heat resistant layer including inorganic heat resistant particles and a binder that is soluble in an organic solvent, wherein the inorganic heat resistant particles includes small particles F(a) having an average particle diameter smaller than 0.2 µm and large particles F(b) having an average particle diameter not less than 0.2 µm.