JP2020091497A5

JP2020091497A5 -

Info

Publication number: JP2020091497A5
Application number: JP2020023234A
Authority: JP
Filing date: 2020-02-14
Publication date: 2021-11-04
Anticipated expiration: 2038-11-26

Description

［実施例４］（比較）
実施例２において、重合性液晶化合物が硬化した層の遅相軸が、偏光子の吸収軸に対し
て４５度であり、保護フィルムＡの延伸方向に対して０度になるように、保護フィルムＡ
を偏光子に貼り合わせたこと以外は、実施例２と同様にして円偏光板を作製し、評価用の
サンプルを作製した。このとき、保護フィルムＡの延伸方向は、長辺方向と平行であった
。 [Example 4] (Comparison)
In Example 2, the protective film is such that the slow-phase axis of the layer on which the polymerizable liquid crystal compound is cured is 45 degrees with respect to the absorption axis of the polarizer and 0 degrees with respect to the stretching direction of the protective film A. A
A circularly polarizing plate was prepared in the same manner as in Example 2 except that the polarizing plate was attached to the polarizing element, and a sample for evaluation was prepared. At this time, the stretching direction of the protective film A was parallel to the long side direction.

Claims

A circularly polarizing plate in which a polarizing plate and a retardation film are laminated via an adhesive layer.
The circularly polarizing plate has an adhesive layer on its surface and has an adhesive layer.
The polarizing plate has a polarizer and has a polarizer.
The retardation film is arranged between the polarizing plate and the pressure-sensitive adhesive layer.
The retardation film contains only one retardation layer and contains only one retardation layer.
The retardation layer includes a layer obtained by curing the polymerizable liquid crystal compound.
The retardation film has a puncture elastic modulus of 15 gf / mm or more and 90 gf / mm or less .
The shape of the circularly polarizing plate is substantially rectangular.
In the polarizing plate, a protective film is laminated on the surface of the polarizing element opposite to the retardation film side.
The protective film is a stretched film and
The stretching direction of the protective film and the short side direction of the circularly polarizing plate are substantially parallel.
The stretching direction of the protective film is 45 degrees with respect to the absorption axis of the polarizer.
The piercing modulus tip diameter is 1 mm in diameter, using a needle which is 0.5 R, elastic modulus der the puncture speed is measured by the test is 0.33 cm / sec is, the test has a diameter 11mm circularly polarizing plate is Ru performed in a state where the circular holes and the retardation film is fixed between two plates of the open.

A circularly polarizing plate in which a polarizing plate and a retardation film are laminated via an adhesive layer.
The circularly polarizing plate has an adhesive layer on its surface and has an adhesive layer.
The polarizing plate has a polarizer and has a polarizer.
The retardation film is arranged between the polarizing plate and the pressure-sensitive adhesive layer.
The retardation film contains only two retardation layers.
The retardation layer includes a layer obtained by curing the polymerizable liquid crystal compound.
The retardation film has a puncture elastic modulus of 15 gf / mm or more and 100 gf / mm or less.
The shape of the circularly polarizing plate is substantially rectangular.
In the polarizing plate, a protective film is laminated on the surface of the polarizing element opposite to the retardation film side.
The protective film is a stretched film and
The stretching direction of the protective film and the short side direction of the circularly polarizing plate are substantially parallel.
The stretching direction of the protective film is 45 degrees with respect to the absorption axis of the polarizer.
The piercing elastic modulus is the piercing speed using a needle having a tip diameter of 1 mmφ and 0.5R.
The elastic modulus is measured in a test in which is 0.33 cm / sec. The test is a circularly polarizing plate in which a retardation film is fixed between two plates having a circular hole with a diameter of 11 mm.

The circularly polarizing plate according to claim 1 or 2, wherein the polarizing element has a thickness of 15 μm or less.

The circularly polarizing plate according to any one of claims 1 to 3, wherein the retardation film has a thickness of 25 μm or less.

The circularly polarizing plate according to claim 1 or 2, wherein the polarizing element is formed from a layer in which a liquid crystal compound is cured.

A circularly polarizing plate with a front plate in which the circularly polarizing plate according to claims 1 to 5 and the front plate are laminated via an adhesive layer.

Circularly polarizing plate according to any one of claims 1 to 5, via the pressure-sensitive adhesive layer, the display is laminated to the display device unit.