Method for manufacturing polarization plate and manufacturing device therefor

Abstract

The present invention pertains to providing: a method for manufacturing an irregularly shaped polarization plate having in particular a small-diameter recessed round part and / or hole part, wherein discoloration, or cracking or snapping, produced in the irregularly shaped polarization plate during machining, and the accumulation of scraping residue at the root section of a blade of an end mill, areinhibited; and a manufacturing device therefor. A method for manufacturing an irregularly shaped polarization plate having a recessed round part, wherein the method is characterized in including a step for forming the recessed round part using a cutting means in which a blade comes into contact from the lateral direction with a surface to be cut and performs cutting, the cutting means being an end mill, and the direction of rotation of the end mill being counterclockwise as viewed from the shank side if the blade of the end mill is a left hand cut right hand helix, and clockwise as viewed from the shank side if the blade of the end mill is a right hand cut left hand helix.

Description

technical field [0001] The invention relates to a manufacturing method and a manufacturing device of a special-shaped polarizing plate. In more detail, it is related with the manufacturing method of the irregular-shaped polarizing plate which has concave rounded corner part and / or hole part, and its manufacturing apparatus. In addition, the present invention also relates to an optical film using the special-shaped polarizing plate. In addition, it also relates to image display devices such as liquid crystal display devices, organic EL display devices, and PDPs using the special-shaped polarizing plate and the optical film. Background technique [0002] In recent years, it has become desirable to use polarizing plates in instrument display units of automobiles, smart watches, and the like. In addition, it is also desirable to use the polarizing plate in a shape other than rectangular, to form a through hole in the polarizing plate, etc., from the viewpoint of the design of ...

AI Technical Summary

Problems solved by technology

However, none of the above-mentioned proposals is merely a proposal related to the final processing of the edge of the cutting edge after cutting the polarizing plate into a rectangle, and is not a technology for performing concave processing on the polarizing plate itself.

In addition, in the above-mentioned proposal, there is no disclosure about the problem that cracks or bending occur when the polarizing plate is subjected to fine concave processing.

[0005] In addition, according to the study of the applicants of the present application, it has been rediscovered this time that the polarizing plate is generally a laminated body of an adhesive layer and a film, so the swarf contains the adhesive. If such shavings containing the adhesive accumulate At the root of the blade, it will be attached to the blade to increase the resistance to rotation, which will cause the problem that the blade cannot rotate stably

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