| 摘要 |
The present invention provides a gasket comprising an adhesive sheet and a substrate sheet laminated on one surface of the adhesive sheet, which shows a distortion recovery rate according to the following compression distortion recovery test (I) of not less than 40%:
Compression distortion recovery test (I): A 10 mm flat square sample is heated to 80°C, under which conditions a load is applied to compress the sample in the thickness direction such that the thickness thereof becomes 75% of the total thickness of the sample before loading, the load is lifted, the total thickness of the sample is measured 3 hr after unloading, and a distortion recovery rate is calculated according to the following formula:
distortion recovery rate (%)=(total sample thickness 3 hr after unloading - (total sample thickness before compression x 0.75))/(total sample thickness before compression x 0.25) x 100. |
