Optical film and method for producing the same

Abstract

Disclosed is an optical film in which a hard coat layer comprising a curable resin precursor that has been cured, a thermoplastic resin, and microparticles having an average primary particle diameter of 1 to 100 nm is formed on at least one surface of a transparent film. The thermoplastic resin can be a thermoplastic resin (particularly a cellulose derivative) that is nonreactive with the curable resin precursor. The ratio of metal oxide microparticles is 0.5 to 4 parts by weight per 100 parts by weight of the curable resin precursor. The metal oxide microparticles can be at least one type of microparticles selected from the group comprising antimony-containing tin oxide, tin oxide, and zinc oxide. The curable resin precursor can be a precursor having four functional groups or more. The optical film has excellent anti-glare properties or anti-Newton ring properties, and has excellent scratch resistance and mechanical characteristics.

Description

technical field [0001] The present invention relates to an optical film used for a display device in a display portion of an electric or electronic device or a precision device, and a method for producing the same. Background technique [0002] In recent years, liquid crystal displays (LCDs) have made remarkable progress and are rapidly spreading as display devices for television (TV) applications or animation display applications. For example, through the development of liquid crystal materials with high-speed response and the improvement of drive methods such as drive acceleration, we have overcome the animation display that liquid crystals were not good at in the past, and are also advancing production technology innovations to cope with the increase in display size. [0003] For applications such as televisions and monitors, where image quality is important, or video cameras used outdoors where there is strong external light, the surface of these displays is usually trea...

AI Technical Summary

Problems solved by technology

[0008] However, in this anti-glare sheet, since only curable resin is used to form the hard coat layer, external stress cannot be relieved, cracks are likely to occur, and streaks are generated along the bending direction even if it is slightly bent.

In particular, the durability is not sufficient for applications that receive repeated keystrokes like the upper transparent electrode of a touch panel

In addition, the optical characteristics are insufficient, the anti-glare property is low, not only the glare can be seen, but also the display of the transmitted image is not clear

In addition, in order to aggregate a large amount of silica fine particles, it is necessary to use an aggregating agent, which causes bleeding

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