Patent ID: 8834656
Filing Date: 2014-09-16
Classification: B32B,Y10T

Abstract:
1. A manufacturing method for a porous composite film having a pre-determined tension, by processing a first porous film and a second porous film, with the first porous film defining and being disposed along a first stretching direction, and the second porous film defining and being disposed along a second stretching direction, comprising the steps of: providing a pressing unit, a film-shaping unit, and a cooling unit; arranging the first and the second porous films in a manner that the first stretching direction and the second stretching direction intersect at a predetermined angle; stacking the first porous film and the second porous film to form a half-finished porous composite film; pressing the half-finished porous composite film by the pressing unit at a temperature T shaping the half-finished porous composite film by the film-shaping unit at a temperature T maintaining the half-finished porous composite film at a pre-determined tension S