| 摘要 |
PURPOSE:To obtain a hydrophilic porous film having excellent air permeability, moisture permeability, bending strength etc., by mixing a linear low-densithy polyethylene resin, a filler and an olefin termpolymer, forming the mixture into a film, drawing the film and performing a high-frequency sputter etching treatment on the surface of the obtd. porous film. CONSTITUTION:A resin compsn. comprising a linear low-density polyethylene resin (e.g. ethylene/bytene-1 copolymer), a filler (e.g. calcium carbonate or alumina) and an olefin terpolymer (e.g. ethylene/propylene/dicyclopentadiene terpolymer) as the essential components is formed into a film, which is drawn to form a porous film. The surface of the porous film is treated by high-frequency sputter etching to obtain a hydrophilic porous film, which is suitably used for separative membranes, moisture-controlling sheets etc. |
