TOUCH PANEL
First Claim
1. A touch panel comprising:
- a plastic substrate film; and
a pressure sensitive adhesive layer that is attached to said substrate film and includes an acrylic resin of which the polydispersity index is 4.0 or less.
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Accused Products
Abstract
The present invention relates to a touch panel. The present touch panel has a shape that comprises a plastic substrate film and a pressure sensitive adhesive layer attached to said substrate film. Here, a phenomenon of penetrating oxygen, moisture or other foreign materials into an interface between said substrate film and said pressure sensitive adhesive layer is prevented, and decrease of optical properties by bubble generation due to the out-gassing phenomenon in the plastic substrate film is prevented. In addition, even if the pressure sensitive adhesive layer is directly attached to the conductive thin film, and it is exposed to a severe condition such as high temperature or high temperature and high humidity condition as such a state, change of resistance in the conductive thin film is effectively inhibited. Therefore, the present touch panel may be stably driven for a long time.
79 Citations
15 Claims
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1. A touch panel comprising:
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a plastic substrate film; and a pressure sensitive adhesive layer that is attached to said substrate film and includes an acrylic resin of which the polydispersity index is 4.0 or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pressure sensitive adhesive composition for a touch panel that comprises an acrylic resin having the polydispersity index of 4.0 or less, and that is satisfied with a condition of the following general formula 1:
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Δ
R=[(R−
Ri)/Ri]×
100≦
15
[General Formula 1]wherein, Δ
R represents a resistance change rate, Ri represents an initial resistance of an ITO electrode measured after a pressure sensitive adhesive layer derived from said pressure sensitive adhesive composition is attached to the ITO electrode, R is a resistance of said ITO electrode measured after the ITO electrode, to which said pressure sensitive adhesive layer is attached, is maintained at 60°
C. and 90% relative humidity for 240 hours. - View Dependent Claims (13, 14, 15)
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Specification