| 摘要 |
Provided is a pressure-sensitive adhesive sheet (1) comprising a base material (11) and a pressure-sensitive adhesive layer (12), and having formed therein a plurality of through-holes (2) passing through one face to the other face thereof. The base material (11) that is used comprises a resin composition containing 50 to 85 wt % of a polyolefin based resin (A) and 15 to 50 wt % of a resin (B) that exhibits a difference no greater than 60° C. between a 5% weight reduction temperature in a thermogravimetric measurement at a temperature rise rate of 20° C./min using nitrogen as an inflowing gas, and a 5% weight reduction temperature in a thermogravimetric measurement at a temperature rise rate of 20° C./min using air as an inflowing gas. This allows obtaining an olefin pressure-sensitive adhesive sheet in which air entrapments and blisters can be prevented or eliminated, and in which through-holes can be formed by laser thermal processing.
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