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Adhesive film for a touch panel, and touch panel

A touch panel, adhesive film technology, applied in the direction of adhesive types, ester copolymer adhesives, instruments, etc., can solve the problem of panels that are prone to air pockets or bubbles, reduced recovery force, and heat resistance of adhesives Reduce and other problems, to achieve the effect of excellent wettability

Active Publication Date: 2012-12-05
KOZA NOVEL MATERIALS KOREA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, since the adhesive disclosed in the above-mentioned document has greatly reduced heat resistance, when it is applied to a high-temperature process above about 100° C., air pockets or bubbles are likely to occur between the adhesive and the adherend or The problem of panel bending, warping, curling (curl), etc., and when writing on the window surface of the touch panel, the recovery force is reduced due to the low molecular weight additive contained in the adhesive, so that after writing There are marks, and there is a hidden danger of adhesive warping during long-term use

Method used

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  • Adhesive film for a touch panel, and touch panel
  • Adhesive film for a touch panel, and touch panel
  • Adhesive film for a touch panel, and touch panel

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0106] Preparation example 1. Preparation of acrylic resin (A)

[0107] Added 65 parts by weight of ethylhexyl acrylate (EHA), 25 parts by weight of methyl acrylate (MA) and 10 parts by weight of acrylic acid ( AA), and added 100 parts by weight of ethyl acetate (EAc) as a solvent. Next, purify nitrogen for about one hour to remove oxygen, and after uniformly mixing the mixture while maintaining a temperature of 62°C, add 0.03 parts by weight of azobisisobutyronitrile (AIBN) diluted to 50% concentration in ethyl acetate as a reaction Initiator. Next, the above-mentioned mixture was reacted to prepare an acrylic resin (A) having a weight average molecular weight of 1,500,000.

preparation example 2

[0108] Preparation example 2. Preparation of acrylic resin (B)

[0109] The acrylic resin (B) with a weight average molecular weight of 2,000,000 was prepared by using the same monomer components as in Preparation Example 1, and properly adjusting the reaction conditions such as the content of the reaction initiator.

preparation example 3

[0110] Preparation example 3. Preparation of acrylic resin (C)

[0111] The acrylic resin (C) with a weight average molecular weight of 800,000 was prepared by using the same monomer components as in Preparation Example 1, and properly adjusting the reaction conditions such as the content of the reaction initiator.

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Abstract

The present invention relates to an adhesive film for a touch panel, and to a touch panel. The adhesive film of the present invention has superior heat resistance, optical characteristics, wettability, cuttability, anti-warpage characteristics and chemical resistance, and exhibits superior durability when applied to a touch panel.

Description

technical field [0001] The invention relates to an adhesive film for a touch panel and a touch panel. Background technique [0002] Recently, mobile terminals such as mobile phones or personal handyphone system (PHS) terminals, and mobile communication terminals such as handheld computer (PDA) terminals are forming a huge market. The technical goals pursued by mobile communication terminals mainly include thinning, light weight, power saving, high resolution, and high brightness. [0003] In particular, a terminal equipped with a touch panel or a touch screen as an input device adopts a structure in which a transparent conductive plastic film such as a polyethylene terephthalate film is used as a base material in order to realize weight reduction and prevent cracks , has a structure in which a film formed with a conductive thin film such as ITO (Indium Tin Oxide, indium tin oxide) is laminated on one side of the conductive glass, reinforcing material, or decorative film thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCC09J133/08G06F2203/04103G06F3/041G06F3/045Y10T428/263Y10T428/28Y10T428/31938
Inventor 金章淳宋玟锡李勇勋李亿炯崔源九韩鹤林
Owner KOZA NOVEL MATERIALS KOREA CO LTD
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