Optical film and image display device including same
An optical film and base film technology, applied in optics, optical components, instruments, etc., can solve the problems of high surface gloss value, defective flashing, unable to fully suppress the contrast/visibility of image display devices, etc., to improve the Effects of visibility, low gloss values, and reflectivity
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preparation example
[0120]
[0121] (1) Preparation of a composition for forming an anti-glare layer
[0122] The components shown in Table 1 below were uniformly mixed to prepare a composition for forming an antiglare layer. The contents of all components used in Table 1 are shown in parts by weight.
[0123] [Table 1]
[0124]
[0125]
[0126] 1) The total content of the anti-glare layer is calculated by the total content of the binder and organic / inorganic fine particles in the composition for forming the anti-glare layer excluding the dispersant, solvent and initiator removed during the forming process .
[0127] 2) The refractive index of the binder is measured after crosslinking (copolymerization) polymerization according to the above-mentioned composition and the preparation examples described hereinafter, and when two or more kinds are used, the refractive index of the organic / inorganic fine particles is determined by the average Worth out.
[0128] 1) UA-306T: (Kyoeisha): He...
Embodiment 1 to 5 and comparative example 1 to 6
[0146]
[0147] As shown in Table 3 below, the anti-glare layer compositions prepared in Preparation Examples 1 to 5 or Comparative Preparation Examples 1 to 5 were respectively coated on a PET base film with a thickness of 100 μm and a refractive index of 1.6 to 1.7 at 90° C. dry for 1 minute under the 2 UV irradiation to prepare an anti-glare layer.
[0148] Then, in Examples 1 to 5 and Comparative Examples 1 to 6, a low refractive layer was formed on the antiglare layer as follows.
[0149] The composition prepared in Preparation Example 6 was coated on the anti-glare layer with a Meyer bar #3, and dried at 90° C. for 1 minute. Then, with 180 mJ / cm under nitrogen purge 2 The dried material was irradiated with ultraviolet rays to form a low refractive index layer with a thickness of 100 nm, thereby forming an optical film.
experiment example
[0150]
[0151] The physical properties of the optical films prepared above were measured according to the following methods, and the results are shown in Table 3 below.
[0152] 1. Measurement of particle size distribution of light-transmitting (organic / inorganic) fine particles
[0153] The particle diameters of the light-transmitting fine particles (organic / inorganic fine particles) contained in Preparation Examples 1 to 5 and Comparative Preparation Examples 1 to 5 were measured in a COULTER PARTICLE SIZE ANALYZER, and the fine particles were separated from In order of smallest particle size to largest size. Thus, the particle size distribution curve of the light-transmitting fine particles is obtained. The organic fine particles are mixed with a solvent such as ethanol, methanol, and isopropanol to prepare a dispersion solution, and then the measurement is performed. In the case of inorganic fine particles supplied as a dispersion, the solution was diluted with the sa...
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