Pressure-sensitive adhesive tape and tape roll

A pressure-sensitive adhesive tape comprising:

• a pressure-sensitive adhesive layer that contains at least a fine particle and/or a bubble and both the surfaces of which are pressure-sensitive adhesive surfaces;
• and
• a release liner having both a release layer (a) that is provided on one surface (1) of the pressure-sensitive adhesive layer so as to contact the one surface (1) and a back surface release layer (b) located opposite to the release layer (a), wherein
• a thickness of the pressure-sensitive adhesive layer is 0.2 to 2.0 mm, and wherein
• the back surface release layer (b) of the release liner is structured such that a holding time, measured in the following way (i) to (iv), is 2500 minutes or longer:
• (i) a test piece (size:
• 25 mm in width×100 mm in length), having the same material as that of the release liner, is provided so as to be fixed to a bakelite plate with the back surface release layer (b) oriented upward;
• (ii) the pressure-sensitive adhesive tape (size:
• 25 mm in width×100 mm in length) is provided, and the other surface (2) of the pressure-sensitive adhesive layer is attached to the back surface release layer (b) of the test piece such that a contact area becomes 25 mm in width×40 mm in length;
• (iii) the pressure-sensitive adhesive tape is pressure-bonded by moving a 5-kg roller one way;
• and
• (iv) a holding time, until the pressure-sensitive adhesive tape drops off from the test piece, is measured by applying a load of 1.96 N (0.2 kgf) to an end portion of the pressure-sensitive adhesive tape, the end portion not contacting the test piece, in a longitudinal direction of the pressure-sensitive adhesive tape and in an environment of an ambient temperature of 40° C.