| 摘要 |
PROBLEM TO BE SOLVED: To provide an olefin-based adhesive sheet which prevents or eliminates air entrapments or blisters through through-holes and has good appearance by suppressing expansion of the inside diameter of the through-hole and also excellent scratch resistance, and further, which is free from such a problem as delamination or cracks when extended.SOLUTION: Then adhesive sheet 1 includes a base material 11 and an adhesive layer 12 and has a plurality of through-holes 2 formed therein which pass through from one surface to the other surface. The base material 11 comprises a first layer 111 positioned on the adhesive layer 12 side and a second layer 112 positioned on the side opposite to the adhesive layer 12. The first layer 111 comprises a resin composition containing 50-88 mass% of a polyolefin-based resin (A), 10-48 mass% of a styrene-based resin and/or an acrylic resin (B) other than the polyolefin-based resin (A), and 2.0-30 mass% of a pigment (C). The main component of the second layer 112 is a polyolefin-based ionomer resin (D), and the ratio of the thickness of the first layer 111 to the thickness of the second layer 112 is 80:20 to 97:3.0. |
