As the adhesive for forming the pressure-sensitive adhesive layer is not particularly limited, for example, acrylic adhesives, rubber pressure-sensitive adhesives, silicone pressure-sensitive adhesives, urethane pressure-sensitive adhesives, polyester pressure-sensitive adhesives, styrene – diene block copolymer pressure-sensitive adhesives, vinyl alkyl ether pressure-sensitive adhesives, polyamide pressure-sensitive adhesives, fluorine-based adhesives, chestnut – flop characteristic improved adhesive can be suitably selected from known adhesives such as radiation-curable pressure-sensitive adhesive. Pressure-sensitive adhesives can be used alone or in combination.