Pressure-sensitive adhesive sheet

A pressure-sensitive adhesive sheet comprising:

• a transparent film substrate;
• and an acrylic pressure-sensitive adhesive layer present on or above at least one side of the transparent film substrate,
• wherein:
• the transparent film substrate comprises a base layer made from a resinous material;
• and a top coat layer present on or above a first face of the base layer;
• the top coat layer comprises a polythiophene, an acrylic resin, and a melamine crosslinking agent and has an average thickness Dave of from 2 to 50 nm and a thickness variation ΔD of 40% or less;
• the acrylic pressure-sensitive adhesive layer is formed from a water-dispersible removable acrylic pressure-sensitive adhesive composition;
• the composition comprises an acrylic emulsion polymer (A) and a compound (B) represented by Formula (I);
• the acrylic emulsion polymer (A) is derived from constitutive monomers comprising a (meth)acrylic alkyl ester and a carboxyl-containing unsaturated monomer as essential constitutive monomers, where the constitutive monomers comprise the (meth)acrylic alkyl ester in a content of 70 to 99.5 percent by weight and the carboxyl-containing unsaturated monomer in a content of 0.5 to 10 percent by weight based on the total amount of the entire constitutive monomers;
• and
• the acrylic emulsion polymer (A) is polymerized with a reactive emulsifier containing at least one radically polymerizable functional group per molecule, Formula (I) expressed as follows:
• R1O—(PO)a-(EO)b—(PO)c—R2 (I)
• wherein each of R1 and R2 independently represents a straight or branched chain alkyl group or hydrogen atom;
• PO represents oxypropylene group;
• EO represents oxyethylene group;
• and each of “a”, “b”, and “c” independently denotes a positive integer, where EO(s) and POs are added in a block manner.