METHOD FOR PRODUCING LAMINATED POROUS FILM

摘要

A method is provided for producing a laminated porous film including: a porous base material layer containing polyolefin as a main component; a filler layer containing inorganic particles as a main component; and a resin layer containing resin particles as a main component, the filler layer and resin layer being provided on opposite surfaces of the porous base material layer. The method includes steps of: applying, on one surface of the porous base material layer, a coating solution containing more than 50 wt % of inorganic particles, and drying the coating solution to form a filler layer, and thereafter applying, on the other surface of the porous base material layer, a coating solution containing more than 50 wt % of resin particles, and drying the coating solution to form a resin layer, the weight percentages (wt %) being based on total weight of components other than the medium of each coating solution.

主权项

1. A method for producing a laminated porous film including: a porous base material layer containing polyolefin as a main component; a filler layer containing inorganic particles as a main component, the filler layer being provided on one surface of the porous base material layer, and a resin layer containing resin particles as a main component, the resin layer being provided on the other surface of the porous base material layer,
said method comprising the steps of: applying, on one surface of the porous base material layer, a coating solution containing more than 50% by weight of inorganic particles with respect to a total weight of components other than a medium of the coating solution, and drying the coating solution to form a filler layer, and thereafter applying, on the other surface of the porous base material layer, a coating solution containing more than 50% by weight of resin particles with respect to a total weight of components other than a medium of the coating solution, and drying the coating solution to form a resin layer.