| 摘要 |
PURPOSE:To provide the subject film which dissolves easily in warm water, has an excellent resistance to moisture permeation, and is prevented from causing the separation of a hydrophobic layer during usual handling. CONSTITUTION:The objective film is provided which has a moisture permeability of 10g/m<2>.day or lower according to JISZ0208 at 20 deg.C and 65% humidity and comprises a polysacharide layer mainly comprising a water-sol. polysaccharide, a hydrophobic layer formed on at least one side of the polysaccharide layer and mainly comprising at least one substance selected from the grop consisting of a wax and a natural resin, and an intermediate layer existing between the polysaccharide layer and the hydrophobic layer and comprising a substance having both hydrophilic and hydrophobic parts in the molecular chain. |
