Transparent film, polarizing plate, and image displaying device

Patent metadata

Field	Value
Publication number	US-2018045870-A1
Application number	US-201715726881-A
Country	US
Kind code	A1
Filing date	Oct 6, 2017
Priority date	Apr 10, 2015
Publication date	Feb 15, 2018
Grant date	—

Abstract

A transparent film includes: a base material; and at least one scratch resistant layer of which indentation hardness is 300 MPa or greater and of which a thickness is 50 to 1,000 nm on an outermost surface of the transparent film at one side or both sides of the base material, and a number of times of folding endurance of the transparent film measured by an MIT testing machine according to JIS P8115 (2001) is 1,000 times or greater.

First claim

What is claimed is:

1 . A transparent film comprising:
a base material; and at least one scratch resistant layer of which indentation hardness is 300 MPa or greater and of which a thickness is 50 to 1,000 nm on an outermost surface of the transparent film at one side or both sides of the base material, wherein a number of times of folding endurance of the transparent film measured by an MIT testing machine according to JIS P8115 (2001) is 1,000 times or greater.

2 . The transparent film according to claim 1 ,
wherein the scratch resistant layer comprises fine particles of which an average primary particle diameter is 100 nm to 1,000 nm and of which indentation hardness is 400 MPa or greater, and a binder resin.

3 . The transparent film according to claim 1 ,
wherein the scratch resistant layer comprises fine particles having indentation hardness of 400 MPa or greater and having a polygonal surface, and a binder resin, wherein the particle size of the fine particles is 100 nm to 1,000 nm in a case where the particle size of the fine particles is converted into a diameter of a virtual circle having a smallest area among the virtual circles which pass through arbitrary two vertices of a projection portion obtained by projecting the polygonal surface of the fine particles in a direction in which a projection area becomes maximum and include the projection portion within the virtual circles, and wherein the fine particles at least exist in an outermost surface area of the transparent film.

4 . The transparent film according to claim 1 ,
wherein the scratch resistant layer comprises 80 mass % or greater of a cured product of a cross-linking compound in which a number of crosslinking groups in one molecule is 3 or more with respect to a total mass of the scratch resistant layer, and the transparent film further comprises a relaxation layer between the scratch resistant layer and the base material.

5 . The transparent film according to claim 2 ,
wherein a shortest distance between end portions of the adjacent ones of the fine particles at an outermost surface of the transparent film is 1 nm to 12 μm.

6 . The transparent film according to claim 3 ,
wherein a shortest distance between end portions of the adjacent ones of the fine particles at an outermost surface of the transparent film is 1 nm to 12 μm.

7 . The transparent film according to claim 2 ,
wherein a dispersion degree of an average primary particle diameter of the fine particles is 10% or less.

8 . The transparent film according to claim 3 ,
wherein a thickness of the base material is 50 μm or less, in a case where the fine particle having the polygonal surface is sandwiched between the virtual circle and a virtual plane parallel to the virtual circle and a distance between the virtual circle and the virtual plane is defined as a thickness of the fine particle, the thickness of the fine particle is 50% or less of a thickness of the scratch resistant layer, the fine particles are unevenly distributed in the outermost surface area of the transparent film, and a ratio of an area occupied by the fine particles to an area of the outermost surface of the transparent film is 30% or greater.

9 . The transparent film according to claim 1 ,
wherein the transparent film has resistance to repetitive bending in which the number of times of folding endurance measured by an MIT testing machine according to JIS P8115 (2001) is 10,000 times or greater.

10 . The transparent film according to claim 1 ,
wherein a haze of the transparent film measured based on JIS-K7136 (2000) is 2.0% or less.

11 . The transparent film according to claim 1 , further comprising:
a relaxation layer between the scratch resistant layer and the base material.

12 . The transparent film according to claim 2 , further comprising:
a relaxation layer between the scratch resistant layer and the base material.

13 . The transparent film according to claim 3 , further comprising:
a relaxation layer between the scratch resistant layer and the base material.

14 . The transparent film according to claim 11 ,
wherein indentation hardness of the relaxation layer is smaller than indentation hardness of the scratch resistant layer.

15 . A polarizing plate comprising:
the transparent film according to claim 1 on an outermost surface of the polarizing plate.

16 . A polarizing plate comprising:
the transparent film according to claim 1 on an outermost surface of the polarizing plate; a polarizer; and a transparent base material having resistance to repetitive bending in which a number of times of folding endurance measured by an MIT testing machine according to JIS P8115 (2001) is 1,000 times or greater, on an opposite surface of the polarizing plate so that the transparent film, the polarizer and the transparent base material are provided in this order.

17 . An image displaying device comprising:
the transparent film according to claim 1 .

18 . An image displaying device comprising:
the transparent film according to claim 1 on an outermost surface of the image displaying device on a viewing side; and a scratch resistant layer which is same as the scratch resistant layer of the transparent film, on an outermost surface of the image displaying device opposite to the viewing side.

Assignees

• Fujifilm Corp

Inventors

• Asahi Miho
• Matsumoto Ayako
• Ibuki Shuntaro
• Watanabe Shinya
• Nakayama Hajime
• Shibata Naoya

Classifications

• G09F9/00

  Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) · CPC title

• B32B27/00 Primary

  Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)} · CPC title

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• B32B27/18

  characterised by the use of special additives · CPC title

• G02B5/3033 Primary

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title