JP2021179599A5 - - Google Patents

Claims (8)

A circular polarizing plate having, in this order , a polarizing layer including a linear polarizing layer, a reinforcing layer, and a retardation layer including a liquid crystal coating type retardation layer,
The elastic modulus of the reinforcing layer is 1 GPa or more,
The circularly polarizing plate has a crack strain of 15% or more,
The crack train is the elongation percentage (%) at which a circularly polarizing plate having a length of 5 cm and a width of 10 mm is pulled at both ends in the length direction at a speed of 4 mm/min, at which a crack occurs in the circularly polarizing plate.
Circular polarizer. The circular polarizing plate according to claim 1, wherein the retardation layer comprises a λ/4 retardation layer, a retardation layer bonding layer, and a positive C layer. The circular polarizing plate according to claim 2, wherein the retardation layer attachment layer has an elastic modulus of 1 GPa or more. The circular polarizing plate according to claim 2 or 3, wherein the retardation layer attachment layer has a thickness of 1 to 5 μm. The circular polarizing plate according to any one of claims 2 to 4, wherein the positive C layer is a liquid crystal coating type retardation layer. 6. The circularly polarizing plate according to claim 1 , wherein a reinforcing layer is formed on a lower surface of the retardation layer. The circular polarizing plate according to any one of claims 1 to 6 , which has a thickness of 5 to 50 µm. The circularly polarizing plate according to any one of claims 1 to 7, which has bending resistance such that no cracks or breaks occur in the retardation layer when the circularly polarizing plate is repeatedly bent 180° with a bending radius of 1 mm with the polarizing layer facing inward and then stretched 300,000 times.