OPTICAL LAMINATE

摘要

The optical laminate includes a surface protection film; a transparent support; an optically anisotropic layer; an adhesive layer; and a release film in this order, and the optically anisotropic layer is a patterned optically anisotropic layer which includes a first phase difference region and a second phase difference region differing from each other in terms of the direction of an in-plane slow axis and in which the first and second phase difference regions are alternately disposed within a plane of the optically anisotropic layer, the transparent support contains a polymer material and has a thickness of 10 μm to 59 μm, and a Δ moisture content falls within a predetermined range. The optical laminate can be stuck on a display apparatus with high accuracy and can improve a vertical viewing angle of the display apparatus after being stuck on the display apparatus.

主权项

1. An optical laminate comprising:
a surface protection film; a transparent support; an optically anisotropic layer; an adhesive layer; and a release film in this order, wherein the optically anisotropic layer is a patterned optically anisotropic layer which includes a first phase difference region and a second phase difference region differing from each other in terms of the direction of an in-plane slow axis and in which the first and second phase difference regions are alternately disposed within a plane of the optically anisotropic layer, the transparent support contains a polymer material and has a thickness of 10 μm to 59 μm, and a Δ moisture content defined by the following Equations (1) and (2) is equal to or less than 0.20% by mass.
Δ moisture content [% by mass]=a moisture content measured after the optical laminate is left in an environment of a temperature of 25° C. and a relative humidity of 40% for 336 hours, and then moved to an environment of a temperature of 25° C. and a relative humidity of 60% and left therein for 300 minutes  (1) a moisture content measured after the optical laminate is left in an environment of a temperature of 25° C. and a relative humidity of 40% for 336 hours.
The moisture content [% by mass]=an amount of water contained in the optical laminate/mass of the optical laminate  (2)