Polarizing plate, manufacturing method therefor, optical film and image display

Abstract

The invention provides a polarizing plate using active energy ray-cured adhesive to adhere polarizing sheet and transparent protective film and having good adhesion. The polarizing plate is a polarizing plate provided with a transparent protective film placed on at least one side of the polarizer; and an adhesive layer and an adhesion facilitating layer interposed in this order from the polarizerside between the polarizer and the transparent protective film, wherein the adhesive layer is formed with an active energy ray-curable adhesive that contains a hydroxyl group-containing N-substitutedamide monomer as a curable component, and the adhesion facilitating layer is formed with a polymer resin composition that contains 100 parts by weight of a polymer resin and 3 to 30 parts by weight of an organosilane compound having at least one functional group selected from an acryloyl group, a methacryloyl group, a vinyl group, and a mercapto group.

Description

technical field The present invention relates to a polarizing plate and a manufacturing method thereof. This polarizing plate can be used alone or as an optical film laminated to form an image display device such as a liquid crystal display device (LCD), an organic EL display device, a CRT, or a PDP. Background technique Liquid crystal display devices are rapidly spreading in the market for clocks, mobile phones, PDAs, notebook computers, monitors for personal computers, DVD players, TVs, and the like. A liquid crystal display device visualizes a change in a polarization state due to switching of liquid crystals, and a polarizing plate can be used according to the display principle. In particular, applications such as TVs require higher and higher brightness and contrast ratios and wider viewing angles. For polarizing plates, higher transmittance, higher polarization degrees, and higher color reproducibility are also required. As a polarizer, for example, an iodine-based ...

AI Technical Summary

Problems solved by technology

However, the polarizing plate using the above-mentioned water-based adhesive has the problem that the size of the polarizing plate changes significantly due to the heat of the backlight, which becomes uneven, and a black display is visible in a part of the entire screen. Whitening so-called light leakage (unevenness)

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