Adhesive treatment liquid, and method for treating adhesive
Provided are a pressure-sensitive adhesive treatment liquid, which can easily remove various kinds of pressure-sensitive adhesives, and a pressure-sensitive adhesive treatment method by which the various kinds of pressure-sensitive adhesives are easily removed. For example, when a pressure-sensitive adhesive tape including a base material and a pressure-sensitive adhesive is used as a treatment object, there are provided a pressure-sensitive adhesive treatment liquid, which can easily separate the base material and various kinds of pressure-sensitive adhesives from each other, and a pressure-sensitive adhesive treatment method by which the base material and the various kinds of pressure-sensitive adhesives are easily separated from each other. A pressure-sensitive adhesive treatment liquid according to an embodiment of the present invention is a treatment liquid for a pressure-sensitive adhesive, and includes a liquid having a Hansen solubility parameter value of 31 or less, and an alkaline compound. The concentration of the alkaline compound is from 0.001 wt % to 20 wt %.
1 . A method of treating a pressure-sensitive adhesive with a pressure-sensitive adhesive treatment liquid, which is a treatment liquid for a pressure-sensitive adhesive, the method comprising impregnating the pressure-sensitive adhesive with the pressure-sensitive adhesive treatment liquid,
wherein the pressure-sensitive adhesive treatment liquid comprises:
a liquid having a Hansen solubility parameter value of 31 or less; and
an alkaline compound,
wherein a concentration of the alkaline compound in the treatment liquid is from 0.001 wt % to 20 wt %.
2 . The pressure-sensitive adhesive treatment method according to claim 1 , further comprising performing stirring under a state in which the pressure-sensitive adhesive is impregnated with the pressure-sensitive adhesive treatment liquid.
3 . The pressure-sensitive adhesive treatment method according to claim 1 , further comprising performing ultrasonic treatment under a state in which the pressure-sensitive adhesive is impregnated with the pressure-sensitive adhesive treatment liquid.
4 . The pressure-sensitive adhesive treatment method according to claim 1 , wherein the Hansen solubility parameter value is 28 or less.
5 . The pressure-sensitive adhesive treatment method according to claim 4 , wherein the Hansen solubility parameter value is 25 or less.
6 . The pressure-sensitive adhesive treatment method according to claim 1 , wherein the concentration of the alkaline compound is from 0.001 wt % to 10 wt %.
7 . The pressure-sensitive adhesive treatment method according to claim 6 , wherein the concentration of the alkaline compound is from 0.01 wt % to 5 wt %.
8 . The pressure-sensitive adhesive treatment method according to claim 7 , wherein the concentration of the alkaline compound is from 0.1 wt % to 1 wt %.
9 . The pressure-sensitive adhesive treatment method according to claim 1 , wherein the pressure-sensitive adhesive includes at least one kind selected from the group consisting of: an acrylic pressure-sensitive adhesive; a urethane-based pressure-sensitive adhesive; a rubber-based pressure-sensitive adhesive; and a silicone-based pressure-sensitive adhesive.