Patent ID: 7211315

Claim:
A thermal transfer protective sheet comprising: a base material, a release layer provided on the base material, and a topcoat layer provided on the release layer, and which is so designed that when the surface of the topcoat layer on the opposite side to the release layer is pressed against an object and heated, the topcoat layer adheres to the object, and when the base material is peeled off from the object while the topcoat layer remains adhered to the object, at least a part of the topcoat layer adhered to the object remains on the object, wherein the release layer includes a first resin and a second resin mixed with each other, the first resin is a thermoplastic acrylic resin, the second resin is a thermoplastic resin incompatible with the first resin and having a glass transition point of 50° C. or less, the mixing ratio of the first resin to the second resin in the release layer is 80:20 or more and 99:1 or less in a weight ratio, and the release layer has a thickness of 1.0 μm or more and 3.0 μm or less.