| abstract |
The present invention provides a coating solution, a laminated porous film, and a method for producing the laminated porous film. The coating solution includes a binder resin, a filler, and a medium; the filler includes a filler (a) with a specific surface area of 7 m 2 /g to 80 m 2 /g, and a specific surface area of 3 m 2 /g to 6 m 2 /g of the mixture of filler (b) below, and the weight ratio of filler (a): filler (b) is 5:95～40:60. The laminated porous film is a laminated porous film in which a heat-resistant layer is laminated on one or both surfaces of a substrate porous film, and the heat-resistant layer is a layer formed by removing a medium from the coating liquid. The method is a method for producing a laminated porous film in which a heat-resistant layer including a filler and a binder resin is laminated on one or both sides of a substrate porous film, and the method includes removing a medium from the coating solution to form a heat-resistant layer. layer process. |