DOUBLE-FACED ADHESIVE TAPE AND PROCESS FOR PRODUCING SAME

摘要

The present invention provides a double-sided adhesive tape in which the adhesive strength between a substrate and each adhesive layer is high and the rupture of the substrate is unlikely to occur. Also, the present invention is a method for producing a double-sided adhesive tape having a polytetrafluoroethylene porous film substrate and adhesive layers formed respectively on both sides of the substrate. The method includes the following steps (1) to (4) in order:
(1) the step of putting an adhesive composition on a first release liner; (2) the step of bonding the first release liner on which the adhesive composition has been put to one main surface of the polytetrafluoroethylene porous film substrate; (3) the step of forming a first adhesive layer by heating the substrate to which the first release liner has been bonded; and (4) the step of providing a second adhesive layer on another main surface of the substrate, a part of an adhesive in the second adhesive layer being penetrated into the substrate.