| 摘要 |
A protective sheet (for example, a protective sheet for masking during plating) is provided that has an excellent balance of adherence to the surface of an adherend and easy releasability when heat and pressure bonded. The protective sheet includes a substrate and a pressure-sensitive adhesive (PSA) layer which is provided on one side of the substrate. The PSA layer is thermoplastic. When the protective sheet is pressure bonded to a polyimide film at a temperature of 120° C. and a pressure of 0.34 MPa for a pressing time of 5 seconds, the protective sheet has a peel strength PSHP, as measured by peeling the protective sheet from the polyimide film at a temperature of 25° C., a peel rate of 5 m/min and a peel angle of 180°, of from 0.05 N/10 mm to 1.0 N/10 mm.
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