| abstract |
Disclosed is a method for preparing a polymer membrane having waterproof and gas permeable properties, directly layered on a film or fiber, which is advantageous in terms of excellent waterproof and gas permeable effect, simple preparation processes, and lowered preparation cost. The method comprises mixing polymer materials with granular inorganic ingredients soluble in acidic or alkaline solution, molding the mixture in a film form, and immersing the mold in acidic or alkaline solution to dissolve out and thus remove the granular inorganic ingredients, to obtain a polymer membrane with waterproof and gas permeable properties. |