Sumitomo Chemical Company, Limited

Tadahiro Kobayashi

Nobuyuki Hatanaka

Akira Yokota

Mitsutaka Sase

Yoshifumi Komatsu

Tatsuaki Kasai

Method for producing a thin optical laminated body. This method is a method for producing a laminated body including a polarization layer, a &#x3bb;/2 layer, a &#x3bb;/4 layer, a positive C layer, and a transfer adhesive layer, the laminated body including the polarization layer, the &#x3bb;/2 layer and the &#x3bb;/4 layer in this member-described order; including the positive C layer between the polarization layer and the &#x3bb;/4 layer, or at the side of the &#x3bb;/4 layer that is opposite to the &#x3bb;/2-layer-arranged side of the &#x3bb;/4 layer; and including the transfer adhesive layer between the polarization layer and the &#x3bb;/4 layer or positive C layer, the method including the step of bonding a bonding body including a substrate and the transfer adhesive layer to an adherend through the transfer adhesive layer, and peeling the substrate from the resultant.

Method for producing laminated body

Laminated body including a substrate and an optically anisotropic layer. This layer satisfies the following expressions (1), (2), and (3): &#x394;n(450)/&#x394;n(550)&#x2264;1.00 (1), and 1.00&#x2264;&#x394;n(650)/&#x394;n(550) (2) wherein &#x394;n(450), &#x394;n(550) and &#x394;n(650) represent the respective birefringences of the layer that are derived from retardation values of the laminated body that are obtained by measuring the laminated body at wavelengths of 450 nm, 550 nm and 650 nm in the state of inclining the fast axis of the layer at an angle of 50 degrees to act as an inclined central axis; and n&#x3e;n&#x2245;n(3) wherein nand nrepresent the respective refractive indexes of the substrate in directions parallel with the plane of the substrate, these directions being orthogonal to each other, and nrepresents the refractive index of the substrate in a direction orthogonal to each of the directions about nand n.

Laminated body

To provide an optical film excellent in suppression of light leakage in black display. An optical film having at least two phase difference layers and having optical properties represented by the formulae (30) and (31) is provided:&#x2212;2.0&#x2264;*&#x2264;0.5&#x2003;&#x2003;(30)&#x2212;0.5&#x2264;*&#x2264;5.0&#x2003;&#x2003;(31)wherein, a* and b* represent the chromatic coordinate in the L*a*b* color system.

Optical film

An orientation layer is provided for an optically anisotropic film disposed between a substrate and an optically anisotropic film. The orientation layer has an orientation regulating force vertically orienting a liquid crystal compound without being subjected to orienting treatment.

Orientation layer for optically anisotropic film

The present invention relates to an optically anisotropic sheet comprising a substrate and a liquid crystal cured layer laminated together, wherein the substrate has a surface roughness of 1.0 nm or less in a field of view of 1 &#x3bc;mand a water contact angle of 70&#xb0; or more.

Optically anisotropic sheet

To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), the second phase difference layer has a thickness of 0.2 &#x3bc;m to 2.0 &#x3bc;m, and further, the optical film has optical properties represented by the formulae (1) and (2):(450)/(550)&#x2266;1.00&#x2003;&#x2003;(1)1.00&#x2266;(650)/(550)&#x2003;&#x2003;(2)nx&#x2248;ny&#x3c;nz&#x2003;&#x2003;(3).

The present invention relates to an optically anisotropic sheet for transfer, comprising a substrate, and a liquid crystal cured layer laminated together, wherein the liquid crystal cured layer is to be transferred from the substrate to a receiver via an active energy ray-curable adhesive, and when the transmittance of the optically anisotropic sheet for transfer at a wavelength of 800 nm is taken as 100%, the transmittance or the optically anisotropic sheet for transfer at wavelength of 390 nm is more than 35% and less than 45%, the transmittance at a wavelength of 400 nm is more than 75% and less than 85%, and the transmittance at a wavelength of 550 nm is more than 95% and less than 100%.

Optically anisotropic sheet for transfer

A process for producing an optically anisotropic film having a high &#x394;n and superior optical performance is provided. The process includes the following steps (A) and (B) carried out in order: (A) a step of applying a composition for forming an optically anisotropic film to a substrate, the composition containing a photopolymerization initiator, a solvent and a polymerizable liquid crystal compound having a maximum absorption wavelength in a range of 250 nm to 370 nm, and (B) a step of applying light with wavelengths in the range of 200 nm to 500 nm that has an allowable variation range of less than 250 nm in wavelength.

Process for producing optically anisotropic film

A process for producing an optically anisotropic film having high transparency is provided. A process for producing an optically anisotropic film is provided, wherein the following steps are carried out in order:

A process for producing an optically anisotropic film component having few defects is provided. The process includes forming a coating continuously on a surface of an elongated film roll, and the process further includes a step of changing the conveyance direction of the elongated film roll on which the coating has been formed while blowing air to a surface of the coating formed on the elongated film roll.

Process for producing optically anisotropic film component

Provided is a method capable of producing an optically anisotropic laminated body in which defects are hardly generated so that light leakage is scarcely caused. This method is a method for producing an optically anisotropic laminated body including a substrate, an oriented film, and an optically anisotropic film, and has steps of: applying, to a surface of the substrate, an oriented-film-forming composition including an oriented-film-forming material and a solvent and having a viscosity of 4 mPa&#xb7;s or less at 25&#xb0; C., and drying the resultant to form the oriented film; and then applying, onto the resultant oriented film, an optically-anisotropic-layer-forming composition including a polymerizable liquid crystal compound, and drying the resultant to orient the polymerizable liquid crystal compound vertically to the surface of the substrate to form the optically anisotropic film.

Method for producing optically anisotropic laminated body

To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3) and the optical film has optical properties represented by the formulae (1), (2) and (30):(450)/(550)&#x2266;1.00&#x2003;&#x2003;(1)1.00&#x2266;(650)/(550)&#x2003;&#x2003;(2)&#x2003;&#x2003;(3)0.001&#x3c;|(550)/(550)|&#x3c;0.2&#x2003;&#x2003;(30).

Optical Film

Optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer having an optical property represented by the formula (3), and the optical film has optical properties represented by the formula (1) and the formula (2). Re(450)/Re(550)&#x2266;1.00(1)1.00&#x2266;Re(650)/Re(550)(2)nx&#x2248;ny&#x3c;nz(3), wherein, Re(450) represents the in-plane phase difference value at a wavelength of 450 nm, Re(550) represents the in-plane phase difference value at a wavelength of 550 nm, and Re(650) represents the in-plane phase difference value at a wavelength of 650 nm, nx represents the principal refractive index in a direction parallel to the film plane, ny represents the refractive index in a direction parallel to the film plane and orthogonally-crossing the direction of nx, nz represents the refractive index in a direction vertical to the film plane, in an index ellipsoid formed by the phase difference layer.

A method for producing a long retardation film having an optical axis in an oblique direction relative to the length direction of the long retardation film is provided.

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Osaka, Japan

Tadahiro Kobayashi