| 摘要 |
PURPOSE:To reduce a slackening phenomenon in summertime and to wind a sheet into a roll form by thinning a slip layer by stacking a polyolefinic film, a metal vapor deposition layer, a specific asphalt composition layer and, if necessary, a release layer in this order. CONSTITUTION:A slip layer sheet is formed by laminating a polyolefinic film 6, a metal vapor deposition layer 5, an asphalt composition layer 3 and a release layer 1 provided if necessary in this order. The softening point of the asphalt composition is set to 60 deg.C or less and the penetration thereof is set to 80 or more (measured at 25 deg.C). Herein, a synthetic resin layer composed of polyethylene terephthalate or polyolefin may be provided between the metal vapor deposition layer 5 and the asphalt composition layer 3. By this method, the thickness of the slip layer 3 can be reduced and the sheet can be stored or transported in a state wound into a roll form and, further, said sheet generates no slackening even in summertime. |
