Touch panel

A touch panel, one-sided technology, applied in the field of pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet, can solve the problem of reduced visibility

Active Publication Date: 2015-06-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the plastic film causes a so-called outgassing phenomenon in which moisture, solvents, or other liquid-phase additives present inside are exhausted in a gaseous state under heat-resistant conditions, and this exhausted gas causes air bubbles, thereby apt to reduce visibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0080] Preparation example 1: the preparation of acrylic resin (A)

[0081] 97 parts by weight of n-butyl acrylate (n-BA) and 3 parts by weight of acrylic acid (AA) were introduced into a 1 L reactor which was refluxed with nitrogen inside and installed with a condenser for easy temperature control. Subsequently, 120 parts by weight of ethyl acetate (EAc) as a solvent and 0.03 parts by weight of 2-mercaptoethanol as a chain transfer agent were introduced thereto. Then, nitrogen was purged for 60 minutes to remove oxygen, and 0.04 parts by weight of a reaction initiator, azobisisobutyronitrile (AIBN), was introduced thereinto with the temperature kept at 60° C., followed by allowing the mixture to react for 8 hours. After the reaction, the reactant was appropriately diluted with ethyl acetate (EAc) to obtain a solid content of 30% by weight, a weight average molecular weight of 800,000 and a polydispersity index (M w / M n ) is an acrylic resin (A) of 2.7. Here, the weight av...

preparation example 2

[0082] Preparation Example 2: Preparation of Acrylic Resin (B)

[0083] Acrylic resin (B) was prepared according to the method of Preparation Example 1 except that 93 parts by weight of n-butyl acrylate (n-BA) and 7 parts by weight of acrylic acid were introduced into the reactor as monomers. The acrylic resin (B) had a solid content of 30% by weight, a weight average molecular weight of 850,000, and a polydispersity index of 2.8.

preparation example 3

[0084] Preparation Example 3: Preparation of Acrylic Resin (C)

[0085] Acrylic acid was prepared according to the method of Preparation 1, except that 98.5 parts by weight of n-butyl acrylate (n-BA) and 1.5 parts by weight of 2-hydroxyethyl methacrylate (2-HEMA) were introduced as monomers in the reactor Resin-like (C). The acrylic resin (C) had a solid content of 30% by weight, a weight average molecular weight of 700,000, and a polydispersity index of 2.3.

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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.

Description

technical field [0001] The invention relates to a touch panel, and a pressure-sensitive adhesive composition and a pressure-sensitive adhesive sheet applied to the touch panel. Background technique [0002] The touch panel is also called a touch screen, and is applied to various information processing terminals such as mobile communication terminals and ATMs or displays such as TVs or monitors. As touch panels are increasingly used in small portable electronic devices and the like, the demand for small and light touch panels is on the rise. [0003] According to the above-mentioned trends, touch panels are increasingly constructed by forming a transparent conductive film on a transparent plastic film using indium tin oxide (ITO) and utilizing the resulting film. [0004] In constructing the touch panel in the above-mentioned shape having the plastic film, the plastic film is adhered to other films or substrates, etc. using a pressure-sensitive adhesive. In pressure-sensiti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/10G06F3/041
CPCC09J133/08G06F3/041Y10T428/2848Y10T428/2891Y10T428/31855Y10T428/31935C09J133/10C09J7/22C09J7/385G06F3/0412G06F3/0416H01H1/64
Inventor 朴敏洙梁世雨金佑河黄闰泰张锡基
Owner LG CHEM LTD
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