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Polyester film and transparent electrode film using the same

A technology of polyester film and polyurethane, applied in the field of polyester film, can solve the problems of reducing the visibility of the screen, difficult to eliminate light interference, and visual fatigue

Active Publication Date: 2018-09-11
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 the same
  • Polyester film and transparent electrode film using the same
  • Polyester film and transparent electrode film using the 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: a 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 a 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 film that does not produce a rainbow phenomenon when hard coating is applied on one side, prevents oligomers in the polyester film from migrating to the surface, has excellent adhesion under high temperature and high humidity conditions, and is transparent A polyester film with excellent electrode layer adhesion and optical properties, and a transparent electrode film using this polyester film. Background technique [0002] Optical films have developed with the expansion of the market for backlight units (BLU: Back Light Unit) such as LCDs and PDPs. Recently, it is used in various fields of displays such as touch screen panels (TSP: Touch Screen Panel) for mobile phones, tablets, etc. [0003] This optical film requires excellent transparency and visibility, and uses a biaxially ...

Claims

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Application Information

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