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Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer

A technology for display devices and polarizers, applied in optics, optical elements, polarizing elements, etc., can solve problems such as difficulty in achieving uniform physical properties, deterioration of physical properties of polyvinyl alcohol films, etc., and achieve excellent productivity and excellent optical properties.

Active Publication Date: 2015-03-04
杉金光电(南京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, while the physical properties of the thus produced polyvinyl alcohol film deteriorate, there is also a problem that it is difficult to achieve uniform physical properties

Method used

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  • Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer
  • Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer
  • Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer

Examples

Experimental program
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Effect test

Embodiment 1

[0100] Three sheets of unstretched polyvinyl alcohol-based film and two sheets of unstretched polyurethane film were alternately stacked on each other without using a medium material, thereby forming an unstretched film laminate having the following structure : Unstretched polyvinyl alcohol-based film / unstretched polyurethane film / unstretched polyvinyl alcohol-based film / unstretched polyurethane film / unstretched polyvinyl alcohol-based film.

[0101] In this case, as the unstretched polyvinyl alcohol-based film, a PE30-grade polyvinyl alcohol-based film (thickness: 30 μm) of Kuraray Corporation was used, and allowed to stand in a pure solution at 25° C. Swelling was performed for 15 seconds, and then a dyeing process was performed at a temperature of 25°C for 60 seconds using an iodine solution having a concentration of 0.3 wt%.

[0102] On the other hand, as the unstretched polyurethane film, a film produced by a thermoplastic polyurethane resin obtained by reacting diphenylm...

Embodiment 2

[0105] Two sheets of unstretched polyvinyl alcohol-based films and two sheets of unstretched polyurethane films were alternately stacked on each other without using a medium material, and in addition to forming an unstretched polyvinyl alcohol-based film with In addition to the unstretched film laminate of the structure of / unstretched polyurethane film / unstretched polyvinyl alcohol-based film / unstretched polyurethane film, by the same method as in Example 1, Two thin-film polarizers with a thickness of 5 to 7 μm.

Embodiment 3

[0107] A 4 wt% aqueous solution was prepared by dissolving polyvinyl alcohol (average degree of polymerization: 2000, saponification degree: 94%, manufactured by Nippon Synthetic Chemicals Co., Ltd.) containing acetoacetyl group (5 wt%) in pure water. Here, with respect to 100 parts by weight of polyvinyl alcohol, 6.7 parts by weight of a titanium amine complex crosslinking agent (TYZOR TE produced by DuPont) was added and stirred to mix, whereby an adhesive A was produced.

[0108] Coating adhesive A to a thickness of 100 nm on both side surfaces of an unstretched polyurethane film, and then bonding two unstretched polyvinyl alcohol-based films to produce an unstretched polyvinyl alcohol-based Film laminate 1 of the structure of vinyl alcohol film / unstretched polyurethane film / unstretched polyvinyl alcohol-based film. Adhesive A is coated to a thickness of 100 nm on one side surface of another unstretched polyurethane film, and then a piece of unstretched polyvinyl alcohol-ba...

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Abstract

The present invention relates to a method for manufacturing a thin polarizer, comprising the steps of: forming a film laminate body by alternately attaching at least two unstretched polymer films and at least two unstretched polyvinyl alcohol-based films by means of an attractive force or an adhesive layer; stretching the film laminate body so that the polyvinyl alcohol-based films have a thickness of 10 μm or less after the stretching; and separating the polymer films and the polyvinyl alcohol-based films from the stretched film laminate body.

Description

technical field [0001] The present disclosure relates to a thin film polarizer, a manufacturing method thereof, and a polarizing plate and a display device including the thin film polarizer, and more specifically, the present disclosure relates to a thin film polarizer having a thickness of 10 μm or less, a manufacturing method thereof, And a polarizing plate and a display device comprising the film polarizing plate. Background technique [0002] The polarizer used in the polarizing plate is an optical device that converts natural light or arbitrarily selected polarized light into polarized light with a specific directionality, and has been widely used in display devices, such as liquid crystal display devices and organic light-emitting devices ( OLED). As polarizers hitherto used in display devices, polyvinyl alcohol (PVA)-based polarizing films containing iodine-based compounds or dichroic dyes and having molecular chains stretched in a predetermined direction have genera...

Claims

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Application Information

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IPC IPC(8): G02B5/30C08J5/18G02F1/1335
CPCG02F1/1335G02B5/305C08J5/18C08J2329/04G02F1/133528
Inventor 南星铉郑棕炫罗钧日柳惠珉
Owner 杉金光电(南京)有限公司
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