| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lightweight material having both of excellent waterproof moisture permeability and excellent durability. SOLUTION: A waterproof moisture permeable composite film is obtained by forming a hydrophilic resin film on one surface of a hydrophobic porous film and having a thickness of 7-30μm and a moisture permeability of 5,000 g/m2.24 hr or more. The thickness of the hydrophilic resin film is set so that, when an electron microscopic photographs obtained by photographing the surface of the hydrophilic resin film using an electron microscope with a magnification of 10,000 times is observed by the naked eye, the contour of the skeletal part of the hydrophobic porous film can be confirmed through the hydrophilic resin film at least in a part of the hydrophilic resin film. The hydrophilic resin continued to the porous film penetrates in the pores of the surface on the film forming side of the porous film and the surface on the side wherein the film is not formed of the porous film is held to a porous structure in which no hydrophilic resin penetrates.</p> |
