Patent ID: 7691225

Claim:
A thermal-release double-coated pressure-sensitive adhesive tape or sheet, comprising: a substrate; a pressure-sensitive adhesive layer (A) containing no foaming agent and being arranged on or above one side of the substrate; and another pressure-sensitive adhesive layer (B) containing a foaming agent and being arranged on or above the other side of the substrate, wherein the pressure-sensitive adhesive layer (A) contains: 5 to 30 parts by weight of the plasticizer; and 100 parts by weight of a base polymer, wherein the pressure-sensitive adhesive layer (A) has a tensile adhesive strength of 1 N/20 mm in width or less with respect to a poly(ethylene terephthalate) film as determined at a peel angle of 180 degrees, a rate of pulling of 300 mm/minute, a temperature of 23±2° C., and a relative humidity of 65±5%, and wherein the pressure-sensitive adhesive double-coated tape or sheet has a loss in weight of the plasticizer of 2 percent by weight or less upon heating of the double-coated pressure-sensitive adhesive tape or sheet at a temperature of 165° C. and a pressure of one atmosphere for one hour.