Antiglare film, polarizer, and image display device

Patent metadata

Field	Value
Publication number	US-10048407-B2
Application number	US-201113879535-A
Country	US
Kind code	B2
Filing date	Oct 21, 2011
Priority date	Oct 22, 2010
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

An antiglare film in which occurrence of screen scintillation and white muddiness can be sufficiently prevented at a high level while maintaining hard coating properties and antiglare properties, and excellent display images with a high contrast can be provided. The antiglare film includes a light-transmitting substrate; and an antiglare layer having a surface roughness on at least one surface of the light-transmitting substrate, wherein the antiglare layer contains an aggregate composed of two or more types of fine particles, and the aggregate forms a projection of the surface of the antiglare layer to form a surface roughness on the antiglare layer.

First claim

The invention claimed is:

1. An antiglare film comprising:
a light-transmitting substrate; and
an antiglare layer having a surface roughness on at least one surface of the light-transmitting substrate,
wherein the antiglare layer contains an aggregate composed of two or more types of spherical fine particles in a binder resin,
the aggregate forms a projection of the surface of the antiglare layer to form a surface roughness on the antiglare layer,
the two or more types of spherical fine particles do not protrude from the surface of the binder resin,
the two or more types of spherical fine particles include one or more types of organic fine particles and one or more types of inorganic fine particles,
the organic fine particles have an average particle size of 0.3 to 10.0 μm and the inorganic fine particles have an average particle size of 500 nm to 5.0 μm, and
the antiglare layer further contains binder particles that promote the formation of an aggregate composed of the organic fine particles and the inorganic fine particles and have a particle size of 200 nm or smaller.

2. The antiglare film according to claim 1 ,
wherein the binder particles are unevenly distributed around the organic fine particles and the inorganic fine particles.

3. The antiglare film according to claim 1 ,
wherein the binder particles are fumed silica.

4. The antiglare film according to claim 3 ,
wherein the fumed silica is surface-treated.

5. The antiglare film according to claim 4 ,
wherein the fumed silica is surface-treated by hydrophobing treatment, and
the hydrophobizing treatment is methyl treatment, octylsilane treatment, or dimethyl silicone oil treatment.

6. The antiglare film according to claim 1 ,
wherein the organic fine particles are fine particles of at least one material selected from the group consisting of acrylic resins, polystyrene resins, styrene/acrylic copolymers, polyethylene resins, epoxy resins, silicone resins, polyvinylidene fluoride resins, and polyfluoroethylene resins.

7. The antiglare film according to claim 1 ,
wherein the inorganic fine particles are at least one type of fine particles selected from the group consisting of particles of aluminosilicate, talc, mica, and silica.

8. A polarizer comprising a polarizing element,
wherein the polarizer comprises the antiglare film according to claim 1 , on a polarizing element surface.

9. An image display device comprising
the antiglare film according to claim 1 , or
a polarizer comprising a polarizing element, wherein the polarizer comprises the antiglare film according to claim 1 on a polarizing element surface, on an outermost surface thereof.

10. The antiglare film according to claim 1 , wherein the organic particles are present in an amount of 0.5 to 15% by mass.

11. The antiglare film according to claim 1 , wherein the organic particles are present in an amount of 2 to 10% by mass.

12. The antiglare film according to claim 1 , wherein the inorganic particles are present in an amount of 0.1 to 10% by mass.

13. The antiglare film according to claim 1 , wherein the inorganic particles are present in an amount of 0.5 to 7% by mass.

14. The antiglare film according to claim 1 , wherein the inorganic particles are configured to be placed among and below the organic fine particles in the aggregate.

15. The antiglare film according to claim 1 , which has a haze value of less than 20%.

Assignees

• Eguchi Junya
• Kitamura Tasuku
• Ogumi Shoichiro
• Dainippon Printing Co Ltd

Inventors

• Eguchi Junya
• Kitamura Tasuku
• Ogumi Shoichiro

Classifications

• G02B5/0226 Primary

  having particles on the surface · CPC title

• B32B27/14 Primary

  next to a particulate layer · CPC title

• B32B27/325

  comprising polycycloolefins · CPC title

• B32B23/12

  next to a particulate layer · CPC title

• B32B27/36

  comprising polyesters · CPC title