Optical polyester thin film and preparation method thereof

A technology of optical polyester film and polyester base film, which is applied in the direction of chemical instruments and methods, optics, optical components, etc., can solve the problems of transparency, scratch resistance, antifouling, and difficulty in back reflectivity, etc., and achieve Good adhesion and easy rolling, and the effect of improving fastness

Active Publication Date: 2012-06-27
HEFEI LUCKY SCI & TECH IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese Patent JP Unexamined Hei 7-151902 discloses a method of increasing the refractive index of the hard coat layer by adding metal oxide particles in the hard coat resin, but it has the following problems: the transparency and scratch resistance of the polyester film , antifouling properties, etc. are reduced by adding metal oxide particles to the hard coat layer; Japanese Patent Application Laid-Open No. 2002-21090

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of primer coating solution:

[0050] Take 15 parts of water-based polyurethane base adhesive emulsion NeoRoz R-620 (provided by DSM), 0.1 part of wetting agent BYK-346 (Byk Chemicals), 1 part of crosslinking agent V-02 (manufactured by Nisshinbo), and remove 80 parts of ionized water, 0.8 parts of a dispersion emulsion containing silicon oxide with a refractive index of 1.55 and an average diameter of 0.079 μm was added, uniformly dispersed by a high-shear emulsifier, and a primer coating solution with a solid content of 5% by mass was obtained.

[0051] Preparation of polyester film:

[0052] The dried polyester chip is melt-extruded, and the melt is cooled on a casting roll to form a polyester base film thick sheet; the two surfaces of the polyester base film thick sheet are coated with the prepared primer coating solution; the surface The thick film of polyester base film coated with the primer coating solution is stretched 3.8 times in the longitudinal ...

Embodiment 2

[0055] Preparation of primer coating solution:

[0056] Take 18 parts of water-based polyester base adhesive emulsion ALFA 15GE (ALFA); 0.1 part of wetting agent BYK-346 (Byk Chemicals); 1 part of crosslinking agent V-02 (manufactured by Nisshinbo); deionized water 80 parts; Add 1 part of dispersion emulsion containing zirconium dioxide with a refractive index of 2.18 and an average diameter of 0.02 μm, and disperse evenly through a high-shear emulsifier to obtain a primer coating solution with a solid content of 6% by mass.

[0057] Preparation of polyester film:

[0058] The dried polyester chip is melt-extruded, and the melt is cooled on a casting roll to form a polyester base film thick sheet; the two surfaces of the polyester base film thick sheet are coated with the prepared primer coating solution; the surface The thick sheet of polyester base film coated with primer coating liquid is stretched 3.5 times in the longitudinal direction; after preheating the stretched fil...

Embodiment 3

[0061] Preparation of primer coating solution:

[0062] Take water-based polyester and polyurethane mixed primer emulsion ALFA 15GE (ALFA) 10 parts and NeoRoz R-620 (DSM) 10 parts; wetting agent BYK-346 (Byk Chemicals) 0.1 part; crosslinking agent V -02 (Nisshinbo) 1 part; 80 parts of deionized water; add 1.5 parts of a dispersion emulsion containing aluminum oxide with a refractive index of 1.62 and an average diameter of 0.05 μm, and disperse evenly through a high-shear emulsifier. An undercoat coating liquid having a solid content of 8% by mass was obtained.

[0063] Preparation of polyester film:

[0064] The dried polyester chip is melt-extruded, and the melt is cooled on a casting roll to form a polyester base film thick sheet; the two surfaces of the polyester base film thick sheet are coated with the prepared primer coating solution; the surface The thick sheet of polyester base film coated with the primer coating solution is stretched longitudinally by 3.0 times; af...

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Abstract

The invention relates to an optical polyester thin film and a preparation method thereof. The thin film comprises a biaxial tension polyester base film and a bottom coating layer coated on at least a surface of the polyester base film, wherein the bottom coating layer contains a filler with a refractive index of 1.55-2.50, and the coating liquid for forming the bottom coating layer comprises 5-10% by weight of a solid component content. The optical polyester thin film of the present invention has the following advantages that: the optical polyester thin film has high transparency, good adhesion and easy winding property; the generation of the interference rainbow fringe after the hard coating processing can be effectively solved; and the optical polyester thin film is applicable for various optical functional films for LCD, high-grade IMD film interior decoration processing and other high-end film material fields.

Description

technical field [0001] The invention relates to an optical polyester film and a preparation method thereof, in particular to an optical polyester film with anti-interference rainbow pattern, which is suitable for high-end optical functional films for various LCDs and high-grade IMD film interior decoration processing, etc. the field of membrane materials. Background technique [0002] Polyester film is mainly made by biaxial stretching process. When producing biaxially stretched polyester film, in order to avoid scratches on the surface of the film and prevent winding adhesion, the known method is to add particulate fillers to polyester chips , However, the addition of particulate fillers will affect the transparency of the polyester film. [0003] As the upstream material of flat panel display, optical polyester film has huge market potential, and its proportion and application scope in home appliances have become more and more extensive; optical polyester film used in the...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B27/36G02B1/10
Inventor 李超熊跃斌霍新莉
Owner HEFEI LUCKY SCI & TECH IND
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