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Polyester film, and transparent electrode film using same

A polyester film and polyurethane technology, applied in the field of polyester film, can solve the problems of reducing screen visibility, visual fatigue, and difficulty in eliminating light interference.

Active Publication Date: 2017-05-10
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this resin is used alone to form a primer coat, since the refractive index is about 1.5, the refractive index of the surface of the biaxially stretched polyester film is 1.64 and the refractive index of the normal hard coat layer is 1.52. On the refractive index side, it is difficult to eliminate the rainbow phenomenon that occurs due to the high refractive index difference between the hard coat layer and the polyester film
This has the problem of causing eye fatigue and reducing the visibility of the screen

Method used

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  • Polyester film, and transparent electrode film using same
  • Polyester film, and transparent electrode film using same
  • Polyester film, and transparent electrode film using same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0125] Preparation of the first water dispersion composition for the primer layer

[0126] An adhesive (P3208, Rohm & Haas Company) prepared from 40% by weight methyl methacrylate, 40% by weight ethyl acrylate and 20% by weight melamine was used. 4% by weight of the adhesive, 0.3% by weight of a silicone-based wetting agent (polyester siloxane copolymer, Q2-5212, Dow Corning Corporation), 0.3% by weight of glue with an average particle diameter of 140nm After adding 0.3% by weight of the solid silica particles to water, the mixture was stirred for 2 hours to prepare a first water-dispersed composition. The primer layer prepared by using the first water dispersion composition had a glass transition temperature of 42.4°C, a swelling degree of 29.6%, and a gel ratio of 90.0%.

preparation example 2

[0128] Preparation of the second water dispersion composition for the primer layer

[0129]Add 40 moles (26 mole%) of 2,6-naphthalene dicarboxylic acid (2,6-Naphtalene dicarboxylic acid), 5 moles (3.3 mole%) of sodium 2,5-dicarboxybenzenesulfonate (sodium 2,5- dicarboxylbenzene sulfonate), 5 moles (3.3 mole%) of dimethyl terephthalic acid, 20 moles (13.3 mole%) of bis[(4-(2-hydroxyethoxy)phenyl]fluorene (Bis[4( 2-hydroxyethoxy)phenyl]fluorene), 10 mol (6.6 mol%) of triglyceride (Triglyceride, product of Kao Corporation (trade name: 85P)), 70 mol (46.6 mol%) of ethylene glycol in a solvent-free state After mixing at low temperature, add it into the reactor, raise the temperature by 1°C per minute from 170°C to 250°C and react, remove water or methanol as a by-product, and carry out esterification reaction, while raising the temperature to 260°C, the reaction The pressure in the vessel was reduced to 1 mm Hg, the diol was recovered as a by-product, and the polycondensation re...

preparation example 3

[0132] Preparation of the third water dispersion composition for the primer layer

[0133] A water-dispersible polyurethane having a theoretical branched polyol content of 50% by weight was prepared. By making 40% by weight of polyol (Polyethyleneadipate Diol: polyethylene adipate diol), 0.6% by weight of trimethylol propane (Trimethylol Propane), 55.9% by weight of hexamethylene diisocyanate (hexamethylenediisocyanate) ) reaction, after preparing the prepolymer (Prepolymer) with the isocyanate functional group as the terminal group, as an ionic group, 3.5% by weight of sodium hydrogen sulfate (Sodium Hydrogen Sulfate) is reacted with the isocyanate as the terminal functional group of the prepolymer to prepare Polyurethane with ionic groups and a weight-average molecular weight of 14400 g / mol.

[0134] The prepared 20% by weight polyurethane was dispersed in 80% by weight water to prepare a polyurethane adhesive with a solid content of 20% by weight. The 4% by weight of th...

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Abstract

The present invention relates to a polyester film to be applied to a touch screen film; and a transparent electrode film using the same and, more specifically, to: the polyester film not generating a rainbow phenomenon when cross-section hard coating is performed, blocking the migration of an oligomer inside a polyester film onto the surface, and having excellent adhesive strength at a high temperature and at a high humidity, thereby exhibiting excellent adhesion to a transparent electrode layer and excellent optical characteristics; and the transparent electrode film using the same.

Description

technical field [0001] The present invention relates to a polyester film used for a touch screen panel and a transparent electrode film using the polyester film. More specifically, it relates to a method that prevents the migration of oligomers in the polyester film to the surface without rainbow phenomenon in the case of hard coating on one side, and is excellent in adhesion under high temperature and high humidity conditions and is compatible with transparency. A polyester film excellent in adhesion and optical properties of the electrode layer, and a transparent electrode film using the polyester film. Background technique [0002] Optical films are developing along with the expansion of the backlight unit (BLU: Back Light Unit) market for LCDs and PDPs. Recently, it is applied to various fields of displays such as touch screen panels (TSP: Touch Screen Panel) of mobile phones, tablet PCs, and the like. [0003] Such an optical film requires excellent transparency and v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08G06F3/041
CPCB32B27/08G06F3/041
Inventor 郑斗焕崔城兰
Owner KOLON IND INC