| 摘要 |
PROBLEM TO BE SOLVED: To provide a moisture-permeable film that is excellent in air permeability and moisture permeability while being very thin and lightweight, and that is excellent in mechanical characteristics in a machine flow direction, liquid leakage resistance, and heat resistance.SOLUTION: The moisture-permeable film is made of a resin composition that comprises: a resin component containing (A) a linear polyethylene resin having a density of 0.910 to 0.929 g/cm, (B) a polyethylene resin having a density of 0.930 to 0.965 g/cm, (C) a low-density polyethylene by a high-pressure polymerization process, having a density of 0.910 to 0.929 g/cm, and (D) a propylene single polymer; and (E) an inorganic filler and (F) a plasticizer, each in a predetermined content. The film has an air permeability of 50 to 5,000 sec/100 mL, a tensile elastic modulus of 60 to 150 MPa or less in a machine flow direction, a bleed-out area of less than 30%, and a heat-resistant temperature of 160°C or higher. |
