Touch sensor laminate and method of manufacturing the same
A touch sensor laminate includes a touch sensor layer, a second adhesive layer formed on an upper surface of the touch sensor layer, a first adhesive layer formed on a lower surface of the touch sensor layer, the first adhesive layer having a peel strength less than that of the second adhesive layer, a release film attached to a lower surface of the first adhesive layer, and an optical film attached on an upper surface of the second adhesive layer.
1. A touch sensor laminate, comprising:
a touch sensor layer;
a second adhesive layer formed on an upper surface of the touch sensor layer;
a first adhesive layer formed on a lower surface of the touch sensor layer, the first adhesive layer having a peel strength less than that of the second adhesive layer before a light irradiation;
a release film attached to a lower surface of the first adhesive layer; and
an optical film attached on an upper surface of the second adhesive layer;
wherein a peel strength of the second adhesive layer is reduced by a light irradiation;
the peel strength of the second adhesive layer after the light irradiation is less than that of the first adhesive layer;
the peel strength of the first adhesive layer before the light irradiation is 0.2 N/25 mm or less, and the peel strength of the second adhesive layer before the light irradiation is in a range greater than 0.2 N/25 mm and less than 20 N/25 mm; and
the second adhesive layer comprises an acryl-based copolymer and a photo-curable compound including at least two functional groups containing a carbon-carbon double bond of an acrylate group per one molecule.
2. The touch sensor laminate according to claim 1 , wherein a peel strength after the light irradiation of the second adhesive layer is less than 0.2 N/25 mm.
3. The touch sensor laminate according to claim 1 , wherein the touch sensor layer includes a multi-layered structure that includes an electrode pattern.
4. The touch sensor laminate according to claim 3 , wherein the touch sensor layer includes an intermediate layer including an organic polymer, an electrode pattern layer and an upper protective layer sequentially stacked from the first adhesive layer.
5. The touch sensor laminate according to claim 4 , wherein the intermediate layer includes a separation layer and a lower protective layer sequentially stacked from the first adhesive layer.
6. The touch sensor laminate according to claim 1 , wherein the optical film includes a protective film formed of a polymer.
7. The touch sensor laminate according to claim 1 , wherein the second adhesive layer and the optical film are formed on a touch face of the touch sensor layer.