Porous film, separator for cell, and cell
AssigneeSumitomo Chemical Company, Limited
InventorsAtsuhiro Takata, Takeshi Yamada, Ryuma Kuroda
Life of this patent
Estimating the term…
Abstract
A porous thermoplastic resin film capable of functioning well as a separator of a cell is provided. The porous film is constituted with a thermoplastic resin and a filler, wherein XR defined by the following formula: XR=25×TGUR×d2/Y is smaller than 5, where Y(μm), TGUR (sec/100 cc), and d (μm) represent the thickness, the gurley value, and the average pore diameter of said film, respectively. The porous film constructed as shown above can reduce the internal resistance of a cell when used as a separator of the cell.
Claims8
A porous film comprising a thermoplastic resin and a filler, wherein XR defined by the following formula:
- XR=25×TGUR×d2/Y
- is less than 5, where Y (μm), TGUR (sec/100 cc), and d (μm) represent the thickness, the gurley value, and the average pore diameter of said film, respectively.
Dependencies are inferred from the claim text.