Antireflection article, polarizing plate, cover glass and image display device, and manufacturing method of antireflection article

Patent metadata

Field	Value
Publication number	US-2016259092-A1
Application number	US-201615059899-A
Country	US
Kind code	A1
Filing date	Mar 3, 2016
Priority date	Mar 4, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

There is provided an antireflection article including: a substrate; and an antireflection layer containing a binder resin and inorganic particles, wherein the inorganic particles are particles having an average primary particle diameter of 150 nm to 250 nm and a CV value of 4% or less, 99.9% or more of the inorganic particles are perfectly spherical particles, the antireflection layer includes a moth eye structure composed of an unevenness shape formed by the inorganic particles on a surface of the antireflection layer, and an area occupancy ratio of the inorganic particles on the surface of the antireflection layer is 25% to 64%.

First claim

1 . An antireflection article comprising:
a substrate; and an antireflection layer containing a binder resin and inorganic particles, wherein the inorganic particles are particles having an average primary particle diameter of 150 nm to 250 nm and a CV value of 4% or less, 99.9% or more of the inorganic particles are perfectly spherical particles, the antireflection layer includes a moth eye structure composed of an unevenness shape formed by the inorganic particles on a surface of the antireflection layer, and an area occupancy ratio of the inorganic particles on the surface of the antireflection layer is 25% to 64%.

2 . The antireflection article of claim 1 ,
wherein an average value of distances between closest particles of the inorganic particles is 30 nm or more.

3 . The antireflection article of claim 1 ,
wherein the area occupancy ratio of the inorganic particles on the surface of the antireflection layer is 25% to 50%.

4 . The antireflection article of claim 1 ,
wherein the inorganic particles have an indentation hardness of 400 MPa or more.

5 . The antireflection article of claim 1 ,
wherein the inorganic particles are silica particles.

6 . The antireflection article of claim 1 ,
wherein the inorganic particles are alumina particles.

7 . The antireflection article of claim 1 ,
wherein the inorganic particles are surface-modified particles.

8 . The antireflection article of claim 1 ,
wherein the substrate is a plastic substrate.

9 . The antireflection article of claim 8 ,
wherein the antireflection article comprises a permeation layer containing a component which forms the plastic substrate, and a binder resin in the antireflection layer, between the plastic substrate and the antireflection layer.

10 . The antireflection article of claim 8 ,
wherein the plastic substrate is a film-type plastic substrate, and the antireflection article is a film-type antireflection article.

11 . The antireflection article of claim 10 ,
wherein the antireflection film has a repeated folding resistance in which the number of times of folding endurance measured by an MIT tester in accordance with the JIS P8115 (2001) is 1,000 or more.

12 . A polarizing plate comprising a polarizer and at least one protective film which protects the polarizer,
wherein the at least one protective film is the antireflection article of claim 10 .

13 . A cover glass comprising the antireflection article of claim 10 as a protective film.

14 . An image display device comprising the antireflection article of claim 1 .

15 . A method of manufacturing an antireflection article comprising a substrate and an antireflection layer containing a binder resin and inorganic particles, wherein the antireflection layer includes a moth eye structure composed of an unevenness shape formed by the inorganic particles on a surface of the antireflection layer, and an area occupancy ratio of the inorganic particles on the surface of the antireflection layer is 25% to 64%, the method comprising:
applying a composition for forming an antireflection layer, which contains inorganic particles in which 99.9% or more are perfectly spherical particles, the inorganic particles having an average primary particle diameter of 150 nm to 250 nm and a CV value of 4% or less, and a polymerizable compound for forming a binder resin onto a substrate, forming a binder resin layer by polymerizing the applied polymerizable compound for forming the binder resin, and forming the moth eye structure composed of the unevenness shape by etching the binder resin layer.

16 . A method of manufacturing an antireflection article comprising, in this order, a plastic substrate, a permeation layer, and an antireflection layer containing a binder resin and inorganic particles, wherein the antireflection layer includes a moth eye structure composed of an unevenness shape formed by the inorganic particles on a surface of the antireflection layer, and an area occupancy ratio of the inorganic particles on the surface of the antireflection layer is 25% to 64%, the method comprising:
applying, onto a plastic substrate, a composition for forming an antireflection layer containing:
inorganic particles in which 99.9% or more are perfectly spherical particles, the inorganic particles having an average primary particle diameter of 150 nm to 250 nm and a CV value of 4% or less;
a polymerizable compound for forming a binder resin; and
a solvent having permeability to a plastic substrate, and
making parts of the solvent having permeability to the plastic substrate and the polymerizable compound for forming the binder resin permeate into the plastic substrate to form a permeation layer.

Assignees

• Fujifilm Corp

Inventors

• Shibata Naoya
• Asahi Miho
• Nakayama Hajime
• Matsumoto Ayako

Classifications

• C03C2217/465

  having a specific shape · CPC title

• C03C2217/475

  Inorganic materials · CPC title

• C03C17/007

  containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase · CPC title

• C03C17/008

  comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28 · CPC title

• C03C2217/478

  Silica · CPC title