Method for manufacturing a multilayer film comprising a step of directly applying a liquid crystal composition containing a polymerizable liquid crystal compound onto a surface of a fed-out first substrate
AssigneeZeon Corporation
InventorsShunsuke Yamanaka, Masakazu Saito, Hiromasa Hashimoto
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Abstract
A multilayer film including: a first long-length substrate; and an optically anisotropic layer that is formed directly on the first substrate and contains cured liquid-crystal molecules, wherein the first substrate has an orientation-controlling force caused by stretching, and a slow axis of the first substrate is different from a lengthwise direction of the first substrate; an optically anisotropic laminate, a circular polarizing plate, and an organic EL display device having the anisotropic layer; as well as manufacturing method thereof.
Claims15
A method for manufacturing a multilayer film comprising:
- a first long-length substrate;
- and
- an optically anisotropic layer that is formed directly on the first substrate and contains cured liquid-crystal molecules, wherein
- the first substrate has an orientation-controlling force caused by stretching and has a birefringence Δn of 0.000050 or more and has a phase difference Re in an in-plane direction of 30 nm or more,
- a slow axis of the first substrate is different from a lengthwise direction of the first substrate, and
- the cured liquid-crystal molecules of the optically anisotropic layer have homogeneous orientation regularity in substantially a same direction as a direction of the slow axis of the first substrate,
- the method comprising:
- a step (I) of feeding out a long-length first substrate in the lengthwise direction, the first substrate having an orientation-controlling force caused by stretching, a birefringence Δn of 0.000050 or more and a phase difference Re in an in-plane direction of 30 nm or more, wherein a slow axis of the first substrate is different from a lengthwise direction of the first substrate;
- a step (II) of directly applying onto a surface of the fed-out first substrate a liquid crystal composition containing a polymerizable liquid crystal compound to form a layer of the liquid crystal composition;
- a step (III) of giving orientation to the polymerizable liquid crystal compound in the layer of the liquid crystal composition;
- and
- a step (IV) of polymerizing the polymerizable liquid crystal compound to form cured liquid-crystal molecules.
Dependencies are inferred from the claim text.