Double-sided pressure-sensitive adhesive tape or sheet

Abstract

The present invention provides a double-sided pressure-sensitive adhesive tape or sheet including a bubble-containing pressure-sensitive adhesive layer; and a releasable liner protecting a pressure-sensitive adhesive surface of the bubble-containing pressure-sensitive adhesive layer, said releasable liner comprising at least a releasably treated layer formed by an ionizing radiation-curable silicone type releasing agent, in which the releasably treated layer formed by the ionizing radiation-curable silicone type releasing agent is employed onto a pressure-sensitive adhesive surface on the heavier releasable side. The double-sided pressure-sensitive adhesive tape or sheet may employ a bubble-containing pressure-sensitive adhesive layer formed by a bubble-containing pressure-sensitive adhesive composition in the form in which a gas component is mixed in a pressure-sensitive adhesive composition.

Description

Claims

1. A double-sided pressure-sensitive adhesive tape or sheet comprising: a bubble-containing pressure-sensitive adhesive layer; anda releasable liner protecting a pressure-sensitive adhesive surface of the bubble-containing pressure-sensitive adhesive layer, said releasable liner comprising at least a releasably treated layer formed by an ionizing radiation-curable silicone type releasing agent,wherein the releasably treated layer formed by the ionizing radiation-curable silicone type releasing agent is employed onto a pressure-sensitive adhesive surface on the heavier releasable side.

2. The double-sided pressure-sensitive adhesive tape or sheet according to claim 1, wherein the bubble-containing pressure-sensitive adhesive layer is formed by a bubble-containing pressure-sensitive adhesive composition in the form in which a gas component is mixed in a pressure-sensitive adhesive composition.

3. The double-sided pressure-sensitive adhesive tape or sheet according to claim 1, wherein the releasable liner comprises: a substrate;a releasably treated layer formed by an ionizing radiation-curable silicone type releasing agent on one side of the substrate, which is employed onto a pressure-sensitive adhesive surface on the heavier releasable side; anda releasably treated layer formed by a thermally curable silicone type releasing agent on the other side of the substrate, which is employed onto a pressure-sensitive adhesive surface on the lighter releasable side.

4. The double-sided pressure-sensitive adhesive tape or sheet according to claim 1, wherein the releasable liner comprises a substrate and releasably treated layers formed by an ionizing radiation-curable silicone type releasing agent on both sides of the substrate.

5. The double-sided pressure-sensitive adhesive tape or sheet according to claim 1, wherein the ionizing radiation-curable silicone type releasing agent is an ultraviolet light-curable silicone type releasing agent.

6. The double-sided pressure-sensitive adhesive tape or sheet according to claim 1, wherein a peel strength (peeling angle: 180°, tensile speed: 300 mm/min, temperature; 23° C., humidity: 50% RH) on the heavier releasable side of the releasable liner is within a range of from 0.1 to 1.5 N/50 mm.