PROTECTIVE SHEET AND USE THEREOF

摘要

A protective sheet is provided that achieves both a high level of performance as a protective sheet (particularly a protective sheet for masking during plating) and an excellent ease of use. 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 formed of an acrylic PSA composition which includes a crosslinking agent and a crosslinking accelerator. The sum D S80 of a flexural rigidity D M80 of the protective sheet at 80°C in the machine direction and a flexural rigidity D T80 of the protective sheet at 80°C in the transverse direction is from 0.1x10 -6 Pa.m 3 to 1.2x10 -6 Pa·m 3 . The PSA layer has a storage modulus G' at 100°C, as measured at a frequency of 1 Hz, of from 0.230x10 -6 Pa to 10x10 6 Pa.