UV-curing adhesive based polarizing plate and preparation method thereof

Abstract

The invention discloses a UV-curing adhesive based polarizing plate and a preparation method thereof. The preparation method comprises the following steps: coating one surface of an optical film witha UV-curing adhesive, and then covering a polarizer on the optical film; and carrying out ultraviolet curing to obtain the polarizing plate. The adhesive used in the invention enables an epoxy compound and a (methyl)acrylate compound to be fully cured without reduction in bonding strength, the transparency of an adhesive layer can be prevented from being reduced, and overflowing of an initiator isalso reduced; a compound formed after the adhesive provided by the invention is mixed and cured contains carboxyl groups and can be combined with water in a high-humidity environment at first, so theproblem that the adhesiveness of a free radical curable adhesive composition is reduced since hydroxyl groups existing on the surface of a polyvinyl alcohol (PVA) film will be preferentially combinedwith hydrogen bonds in moisture instead of being combined with hydrogen bonds in the free radical curable adhesive composition in a high-humidity environment in the prior art is overcome.

Description

technical field [0001] The invention relates to a UV curing adhesive-based polarizing plate. Background technique [0002] The traveling direction of the light wave is perpendicular to the electric field and magnetic field, and the electric field and magnetic field components of the light wave itself are also perpendicular to each other, that is to say, the traveling direction and the electric field and magnetic field components are parallel to each other. At this time, the polarizing plate will block the component perpendicular to the polarizing plate, and only allow the component parallel to the polarizing plate to pass through. So if you pick up a polarizer and look at the light source, the light becomes darker, but if you stack two polarizers together, it will be different. Rotate the relative angle of the two polarizers, and you will find that the brightness of the light will become darker with the difference in the relative angle; when the fence angles of the two pola...

AI Technical Summary

Problems solved by technology

Rotate the relative angle of the two polarizers, and you will find that the brightness of the light will become darker with the difference in the relative angle; when the angles of the fences of the two polarizers are perpendicular to each other, the light will not pass through at all.

As an important raw material for polarizing plates, adhesives are very important. The existing cationic curing adhesives have high adhesion and heat resistance to various films, but there will be dark polymerization (delayed curing), so the cured product of the adhesive is in volume When stored in the form of wood, there will be a problem of easy curling and deformation

In addition, the polarizing plate may cause serious light leakage under conditions worse than heat and humidity (such as soaking in warm water at 60°C)

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