| 摘要 |
Disclosed is a porous film manufacturing apparatus which is obtained by further improving an already filed porous film manufacturing apparatus and which can regularly form a large number of non-through pores (16) with a fine opening width of sub- mu m to several tens mu m at a high density in elongated films (13) made of various materials, with almost no deterioration in the essential characteristics of the film materials. This porous film manufacturing apparatus includes a feed unit for feeding an elongated film (13), a perforating unit including a first block (2) having a surface on which a large number of diamond particles (3) with acute corner portions are deposited, a second block (10) having a surface on which a desired protruding pattern (11) is formed, and an elastic organic polymer sheet (12) so arranged as to cover at least the protruding pattern (11) of the second block (10), the first and second blocks (2, 10) being arranged such that the particle-deposited surface of the first block (2) and the organic polymer sheet (12) oppose each other, and a pressurizing unit for moving the movable block toward the stationary block until the distance between projecting ends of the particles (3) and the surface of a portion of the organic polymer sheet (12) located on the protruding pattern (11) becomes smaller than the thickness of the elongated film (13) fed to a position between the movable and stationary blocks, thereby pressing the acute corner portions of the particles (3) into the elongated film (13) in a region opposing the protruding pattern (11). <IMAGE> |
