MOISTURE-PERMEABLE ELASTOMER SHEET

摘要

A moisture-permeable elastomer sheet which is excellent in moisture permeability and waterproofness and does not suffer separation between the moisture-permeable film and the substrate during and after use. It has moderate stiffness and hence has excellent handleability. It is useful in pressure-sensitive adhesive sheets such as first-aid sticking plasters. The moisture-permeable elastomer sheet comprises a porous elastomer sheet having a basis weight of 10 to 150 g/m<2> and, united therewith by fusion bonding, a moisture-permeable film of a thermoplastic elastomer having a thickness of 5 to 50 µm, the area of fusion bonding being 1 to 70%. It has a moisture permeability of 1,000 g/m<2>.24h or higher and a water pressure resistance of 500 mmH2O or higher. The thermoplastic elastomer constituting the moisture-permeable film preferably is a thermoplastic polyurethane.