Unlock instant, AI-driven research and patent intelligence for your innovation.

Polarizing plate with anti-reflection layer and method for producing the same

An anti-reflection layer and manufacturing method technology, applied in the direction of polarizing elements, chemical instruments and methods, layered products, etc., can solve the problems of poor appearance, poor appearance, and uneven hue difference of polarizers, and achieve optical reliability and suppression bad appearance effect

Active Publication Date: 2022-07-19
NITTO DENKO CORP
View PDF24 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, when the polarizing plate having such an antireflection layer is placed in a high-temperature, high-humidity environment, a difference in hue between the portion near the damage and other portions may be visually recognized as uneven appearance (yellow unevenness) in some cases.
In addition, in the polarizer with an antireflection layer formed on the base material, there is room for improvement in the chemical resistance of the base material, and the appearance of the polarizer may be whitened in a high-temperature and high-humidity environment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polarizing plate with anti-reflection layer and method for producing the same
  • Polarizing plate with anti-reflection layer and method for producing the same
  • Polarizing plate with anti-reflection layer and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples. In addition, the measuring method of each characteristic is as follows.

[0094] (1) Moisture permeability of polarizer

[0095] The polarizing plate (polarizer laminated body) used in the Example and the comparative example was cut out in the circular shape of 10 cmΦ, and it was set as a measurement sample. The measurement sample was left to stand for 24 hours under the conditions of a temperature of 40°C and a humidity of 92%RH, and then the moisture permeability was measured under the test conditions of a temperature of 40°C and a humidity of 90%RH using "MOCON" manufactured by Hitachi, Ltd. .

[0096] (2) The moisture permeability of the substrate

[0097] For the films used as the substrates in the examples and comparative examples, in accordance with the moisture permeability test (cup method) of JIS Z0208, the passing area of ​​1 m within 2...

manufacture example 1

[0108] Production of acrylic resin film 1

[0109] Methyl methacrylate (MMA), 2-(hydroxymethyl) methyl acrylate (MHMA), and toluene were added to a reactor equipped with a stirring device, a temperature sensor, a condenser tube, and a nitrogen gas introduction tube, and extrusion at 250°C was carried out. Cyclization condensation reaction and devolatilization are carried out in the machine to obtain transparent lactone ring-containing acrylic resin particles. The obtained pellets were mixed with acrylonitrile-styrene resin, melt-kneaded using a twin-screw extruder at a cylinder temperature of 240°C, and re-pelletized.

[0110]The obtained pellets were put into a single-screw extruder, melt-mixed, and formed into a film through a T-die.

[0111] The obtained extruded film was simultaneously biaxially stretched to 2 times in the longitudinal direction and the width direction, respectively, at a stretching temperature of 160°C. The thickness of the obtained film was 40 μm. Th...

manufacture example 2

[0112] Production of acrylic resin film 2

[0113] Methyl methacrylate (MMA), 2-(hydroxymethyl) methyl acrylate (MHMA), toluene, and polystyrene were added to the reactor equipped with a stirring device, a temperature sensor, a condenser tube, and a nitrogen introduction tube, and the mixture was heated at 250 °C. The cyclization condensation reaction and devolatilization are carried out in an extruder at ℃ to obtain transparent lactone ring-containing acrylic resin particles. The obtained pellets were put into a single-screw extruder, melt-mixed, and formed into a film through a T-die. The obtained extruded film was simultaneously biaxially stretched to 2 times in the longitudinal direction and the width direction, respectively, at a stretching temperature of 160°C. The thickness of the obtained film was 40 μm. The resin composition ratio of the obtained film was confirmed by NMR and found to be 76% of MMA, 19% of lactone rings, and 5% of styrene.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a polarizing plate with an antireflection layer that can suppress occurrence of appearance defects (yellow unevenness, whitening) even when placed in a high-temperature and high-humidity environment. The polarizer with an antireflection layer of the present invention includes: a polarizer having a polarizer and a protective layer provided on one side of the polarizer; a base material attached to the protective layer; and an antireflection layer directly formed on the substrate. The base material and the protective layer contain a resin, and the relative energy difference RED based on the Hansen solubility parameter of the resin and oleic acid is 1.05 or more. In an embodiment of the present invention, the moisture permeability of the polarizer with an anti-reflection layer is 0.2 g / m 2 / 24h or less, and the moisture permeability of the substrate is 150g / m 2 / 24h or less.

Description

technical field [0001] The invention relates to a polarizer with an anti-reflection layer and a manufacturing method thereof. Background technique [0002] In the present invention, in an image display device (for example, a liquid crystal display device, an organic EL display device, a quantum dot display device), a polarizing plate is arranged on at least one side of the display unit in many cases due to the image forming method. It is widely known that a polarizer arranged on the visible side of an image display device is provided with an antireflection layer (antireflection treatment is performed) on the visible side in order to prevent external light from being reflected on the display screen. When an antireflection treatment is performed on a base material to form an antireflection layer, the thickness of the antireflection layer can be reduced, and the thickness of the polarizing plate can be reduced. In this antireflection layer, damage is likely to occur on the sur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B32B7/023G02B1/115
CPCG02B5/30G02B1/115B32B7/023G02B5/3033B32B27/308B32B27/36B32B27/365
Inventor 望月政和高见佳史北村吉绍东慎太郎
Owner NITTO DENKO CORP