JP2011112964A5

JP2011112964A5 -

Info

Publication number: JP2011112964A5
Application number: JP2009270641A
Authority: JP
Filing date: 2009-11-27
Publication date: 2012-04-19
Anticipated expiration: 2029-11-27

Description

本発明は、光透過性基材上に少なくとも防眩層を有する光学積層体であって、上記防眩層は、上記光透過性基材と反対側表面に凹凸形状を有し、上記凹凸形状は、上記防眩層を構成するバインダー樹脂の相分離により形成された凹凸形状（Ａ）、及び、上記防眩層に含まれる内部散乱粒子により形成された凹凸形状（Ｂ）からなり、かつ、上記凹凸形状（Ａ）は、海島構造を構成し、上記内部散乱粒子により形成された上記凹凸形状（Ｂ）の凸部は、上記凹凸形状（Ａ）の上記海島構造の海部分に形成されていることを特徴とする光学積層体である。
また、本発明は、光透過性基材上に少なくとも防眩層を有する光学積層体であって、上記防眩層は、上記光透過性基材と反対側表面に凹凸形状を有し、上記凹凸形状は、上記防眩層を構成するバインダー樹脂の相分離により形成された凹凸形状（Ａ）、及び、上記防眩層に含まれる内部散乱粒子により形成された凹凸形状（Ｂ）からなり、かつ、十点平均粗さＲｚが３μｍ未満であることを特徴とする光学積層体である。
上記防眩層表面の凹凸形状は、十点平均粗さＲｚと算術平均粗さＲａとの比（Ｒｚ／Ｒａ）が１２未満であることが好ましい。
上記防眩層表面の凹凸形状は、粗さ曲線のクルトシスＲｋｕが４以下であることが好ましい。
上記内部散乱粒子は、防眩層表面の凹凸形状（Ａ）の凸部の形成に寄与する樹脂成分よりも凹部の形成に寄与する樹脂成分に対する親和性が高いことが好ましい。
本発明はまた、光透過性基材上に少なくとも防眩層を有する光学積層体の製造方法であって、上記光透過性基材上に、互いに非相容である２種以上のバインダー樹脂及び内部散乱粒子を含む防眩層用組成物を塗布して塗膜を形成する工程、並びに、上記塗膜を硬化させて防眩層を形成する工程を有することを特徴とする光学積層体の製造方法でもある。
以下に、本発明を詳細に説明する。 The present invention is an optical laminate having at least an antiglare layer on a light-transmitting substrate, wherein the antiglare layer has an uneven shape on the surface opposite to the light-transmitting substrate, and the uneven shape Consists of a concavo-convex shape (A) formed by phase separation of the binder resin constituting the anti-glare layer, and a concavo-convex shape (B) formed by internal scattering particles contained in the anti-glare layer, and The concavo-convex shape (A) constitutes a sea-island structure, and the convex portions of the concavo-convex shape (B) formed by the internal scattering particles are formed in the sea portion of the sea-island structure of the concavo-convex shape (A). It is an optical laminated body characterized by having.
Further, the present invention is an optical laminate having at least an antiglare layer on a light transmissive substrate, wherein the antiglare layer has an uneven shape on a surface opposite to the light transmissive substrate, The concavo-convex shape consists of the concavo-convex shape (A) formed by phase separation of the binder resin constituting the anti-glare layer, and the concavo-convex shape (B) formed by the internal scattering particles contained in the anti-glare layer. The ten-point average roughness Rz is less than 3 μm.
As for the uneven | corrugated shape of the said glare-proof layer surface, it is preferable that ratio (Rz / Ra) of ten-point average roughness Rz and arithmetic average roughness Ra is less than 12.
The uneven shape of the antiglare layer surface preferably has a kurtosis Rku of the roughness curve of 4 or less.
The internal scattering particles preferably have a higher affinity for the resin component that contributes to the formation of the recess than the resin component that contributes to the formation of the projection of the uneven shape (A) on the surface of the antiglare layer.
The present invention is also a method for producing an optical laminate having at least an antiglare layer on a light-transmitting base material, the two or more binder resins being incompatible with each other on the light-transmitting base material, and Production of an optical laminate comprising a step of applying a composition for an antiglare layer containing internal scattering particles to form a coating film, and a step of forming an antiglare layer by curing the coating film. It is also a method.
The present invention is described in detail below.

Claims

An optical laminate having at least an antiglare layer on a light transmissive substrate,
The antiglare layer has a concavo-convex shape on the surface opposite to the light transmissive substrate,
The uneven shape comprises an uneven shape (A) formed by phase separation of the binder resin constituting the antiglare layer and an uneven shape (B) formed by internal scattering particles contained in the antiglare layer. ,And,
The uneven shape (A) constitutes a sea-island structure,
The convex part of the uneven shape (B) formed by the internal scattering particles is formed in the sea portion of the sea-island structure of the uneven shape (A).
An optical laminate characterized by the above.

An optical laminate having at least an antiglare layer on a light transmissive substrate,
The antiglare layer has a concavo-convex shape on the surface opposite to the light transmissive substrate,
The uneven shape comprises an uneven shape (A) formed by phase separation of the binder resin constituting the antiglare layer and an uneven shape (B) formed by internal scattering particles contained in the antiglare layer. ,And,
An optical laminate having a ten-point average roughness Rz of less than 3 μm.

The optical laminate according to claim 2 , wherein the uneven shape on the surface of the antiglare layer has a ratio (Rz / Ra) of ten-point average roughness Rz to arithmetic average roughness Ra of less than 12.

The optical laminate according to claim 2 or 3 , wherein the uneven shape on the surface of the antiglare layer has a kurtosis Rku of the roughness curve of 4 or less.

Internal scattering particles, antiglare layer surface irregularities (A) has high affinity claim 1 for contributing resin component forming recess than contributing resin component forming the convex portion of the, 3 or 4, wherein Optical laminate.

A method for producing an optical laminate having at least an antiglare layer on a light-transmitting substrate,
On the light transmissive substrate, a step of forming a coating film by applying a composition for an antiglare layer containing two or more binder resins and internal scattering particles that are incompatible with each other; and
The manufacturing method of the optical laminated body characterized by having the process of hardening the said coating film and forming an anti-glare layer.