KR20190141595A - Method for manufacturing liquid crystal film and method for manufacturing optical laminate - Google Patents

Abstract

The present invention relates to a manufacturing method for a liquid crystal film comprising: a process of preparing a first lamination unit having an adhesive layer, which consecutively includes a first substrate layer, a first liquid crystal layer, and the adhesive layer; a process of preparing a second lamination unit including a second substrate layer and a second liquid crystal layer; a process of conducting surface activation treatment to at least one between the surface of the adhesive layer of the first lamination unit having an adhesive layer, and the surface of the second liquid crystal layer of the second lamination unit; a process of removing at least one of a firs end unit including the end unit of the adhesive layer, with respect to a width-direction cross-section of the first lamination unit having an adhesive layer; and a process of acquiring a liquid crystal laminate by bonding the adhesive layer of the first lamination unit having an adhesive layer and the second liquid crystal layer of the second lamination unit after removing the first end unit. In addition, in the first lamination unit having an adhesive layer, the position of the end unit of the adhesive layer is in the inner side of the width direction more than the position of the end unit of the first liquid crystal layer with respect to end unit of at least one side of the width-direction cross-section. Moreover, the removing process is conducted before or after the process of conducting surface activation treatment, and with respect to the width-direction cross-section of the first lamination unit having an adhesive layer after removing the first end unit, is to remove the first end unit so that the position of the end unit of the adhesive layer at the side wherein the first end unit is removed can be the same as the position of the end unit of the first liquid crystal layer. Therefore, the manufacturing method for a liquid crystal film and a manufacturing method for an optical laminate can be appropriate for manufacturing an optical laminate.

Description

The manufacturing method of a liquid crystal film, and the manufacturing method of an optical laminated body {METHOD FOR MANUFACTURING LIQUID CRYSTAL FILM AND METHOD FOR MANUFACTURING OPTICAL LAMINATE}

This invention relates to the manufacturing method of a liquid crystal film, and the manufacturing method of an optical laminated body.

An organic EL display device using an organic light emitting diode (OLED) is not only lighter and thinner than a liquid crystal display device, but also can realize a high image quality such as a wide viewing angle, fast response speed, and high contrast. It is used in various fields, such as a television and a digital camera. In organic electroluminescence display, in order to suppress the visibility fall by reflection of external light, it is known to improve antireflection performance using a circularly polarizing plate etc.

JP2015-25947A1 describes a circularly polarizing plate in which a linear polarizing plate and a quarter wave plate are laminated as an optical film applied to an image display panel of an organic EL display device or a liquid crystal display device. It is described to constitute by lamination of a 1/2 wavelength retardation layer and a 1/4 wavelength retardation layer.

An object of this invention is to provide the manufacturing method of a liquid crystal film suitable for manufacturing an optical laminated body, and the manufacturing method of an optical laminated body.

This invention provides the manufacturing method of the liquid crystal film shown below, and the manufacturing method of an optical laminated body.

[1] a step of preparing a first laminate with an adhesive layer comprising a first base material layer, a first liquid crystal layer and an adhesive layer in this order;

Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;

Surface-activating at least one of the surface of the adhesive layer side of the first laminate part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;

Removing at least one of a first end portion including an end portion of the adhesive layer in a cross section in the width direction of the first laminate part with adhesive layer;

And a step of bonding the adhesive layer of the first laminated part with the adhesive layer after the first end removal and the second liquid crystal layer of the second laminated part to obtain a liquid crystal layer laminate.

The said 1st laminated part with a contact bonding layer has the position of the edge part of the said contact bonding layer in the width direction inside at least one edge part of the width direction cross section,

The removing step,

Before or after the surface activation treatment,

In the width direction cross section of the said 1st laminated part with a contact bonding layer after the said 1st edge removal, the said position so that the position of the edge part of the said adhesive layer by the side from which the said 1st edge was removed is the same as the position of the edge part of a said 1st liquid crystal layer. The manufacturing method of the liquid crystal film which removes 1 end.

[2] The method for producing a liquid crystal film according to [1], wherein the removing step is performed before the surface activation treatment.

[3] In the cross-sectional cross-section, the first laminated portion with the adhesive layer has a position in the width direction both ends of the adhesive layer in the width direction than the position in the width direction both ends of the first liquid crystal layer,

The said 1st edge part is a manufacturing method of the liquid crystal film as described in [1] or [2] which is the width direction both ends of the said 1st laminated part with an adhesion layer.

[4] a step of preparing a first laminated portion with an adhesive layer comprising a first base material layer, a first liquid crystal layer, and an adhesive layer in this order;

Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;

Surface-activating at least one of the surface of the adhesive layer side of the first laminate part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;

It has a process of joining the said adhesive layer of the said 1st laminated part with an adhesive layer and the said 2nd liquid crystal layer of the said 2nd laminated part, and obtaining a liquid crystal layer laminated body,

In the said 1st laminated part with a contact bonding layer, in the width direction cross section, the position of the width direction edge part of the said contact bonding layer is width direction inner rather than the position of the edge part of the said 1st liquid crystal layer in the width direction cross section,

The said liquid crystal layer laminated body is the manufacture of the liquid crystal film whose position of the edge part of the said contact bonding layer is the same as the position of the edge part of a said 2nd liquid crystal layer in the width direction outer side at least in one edge part of the said width direction cross section. Way.

[5] In the cross-sectional cross section, the first laminated portion with the adhesive layer has a position at both ends in the width direction of the adhesive layer in the width direction than a position at both ends in the width direction of the first liquid crystal layer.

In the cross section of the liquid crystal layer, in the cross section of the width direction, the position of the both ends of the width direction of the said adhesive layer is described in [4] whose position is the same as or more than the position of the width direction both ends of the said 2nd liquid crystal layer in width direction outer side. Method for producing a liquid crystal film.

[6] In the liquid crystal layer laminate, the position of the end of the second liquid crystal layer is the same as the position of the end of the second base layer at at least one end of the cross section in the width direction. The manufacturing method of the liquid crystal film of 5].

[7] The liquid crystal layer laminate has, in its widthwise cross section, a position at both ends of the second liquid crystal layer in the width direction equal to a position at both ends of the second substrate layer in the width direction. The manufacturing method of the liquid crystal film as described in any of the above.

[8] Furthermore, any of [1] to [7] having a step of peeling a first peeling layer including one of the first base material layer and the second base material layer in the liquid crystal layer laminate. The manufacturing method of the liquid crystal film described.

[9] A step of preparing a first laminated portion with an adhesive layer comprising the first base material layer, the first liquid crystal layer, and an adhesive layer in this order, wherein at least one end of the cross section in the width direction of the first laminated portion with the adhesive layer is used. Preparing a first laminated portion with an adhesive layer having a position in an end portion of the adhesive layer in a width direction inner than a position in an end portion of the first liquid crystal layer;

Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;

Surface-activating at least one of the surface of the adhesive layer side of the first laminate part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;

It is a process of joining the said contact bonding layer of the said 1st laminated part with a contact bonding layer, and the said 2nd liquid crystal layer of a said 2nd laminated part, and obtaining a liquid crystal layer laminated body, in the said at least one edge part of the width direction cross section of the said liquid crystal layer laminated body, Obtaining the liquid crystal layer laminate such that the position of the end of the adhesive layer is inward in the width direction than the position of the end of the second liquid crystal layer;

It has a process of removing the 2nd edge part including the edge part of the said adhesive layer of the side in which the said one edge part is located in the said liquid crystal layer laminated body,

In the removing step, the position of an end portion of the adhesive layer on the side from which the second end is removed is the position of the end of the first liquid crystal layer and the second liquid crystal in the cross section in the width direction of the liquid crystal layer laminate after the second end is removed. And removing said second end to be equal to the position of at least one end of the layer.

[10] In the removing step, the position of the end of the adhesive layer on the side from which the second end is removed is the end of the first liquid crystal layer in the cross section in the width direction of the liquid crystal layer laminate after the second end is removed. The manufacturing method of the liquid crystal film as described in [9] which removes the said 2nd edge part so that it may become the same as the position of, and becomes the same as the position of the edge part of a said 2nd liquid crystal layer.

[11] In the cross section of the width direction, the first laminated portion with the adhesive layer has a position at both ends in the width direction of the adhesive layer being wider in the width direction than a position at both ends in the width direction of the first liquid crystal layer.

In the width direction cross section of the said liquid crystal layer laminated body, the position of the both ends of the said contact bonding layer is set in the width direction inside rather than the position of the both ends of a said 2nd liquid crystal layer,

The said 2nd end part is a manufacturing method of the liquid crystal film as described in [9] or [10] which is the width direction both ends of the said liquid crystal layer laminated body.

[12] [9] to a step of peeling the first release layer including one of the first base material layer and the second base material layer in the liquid crystal layer laminate after removing the second end portion. The manufacturing method of the liquid crystal film as described in any one of [11].

[13] A step of preparing a first laminated portion with an adhesive layer comprising a first base material layer, a first liquid crystal layer, and an adhesive layer in this order, wherein the adhesive layer is formed at at least one end of a widthwise cross section of the first laminated portion with an adhesive layer. Preparing a first laminated portion with an adhesive layer having a position at an end of the first liquid crystal layer in a width direction inner than a position of an end of the first liquid crystal layer;

Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;

Surface-activating at least one of the surface of the adhesive layer side of the first laminate part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;

It is a process of joining the said contact bonding layer of the said 1st laminated part with a contact bonding layer, and the said 2nd liquid crystal layer of a said 2nd laminated part, and obtaining a 1st liquid crystal layer laminated body, The said at least one of the said width direction cross section of a said 1st liquid crystal layer laminated body. At an end portion, obtaining a first liquid crystal layer laminate such that a position of an end portion of the adhesive layer is inward in a width direction than a position of an end portion of the second liquid crystal layer;

Peeling a first peeling layer including one of said first substrate layer and said second substrate layer of said first liquid crystal layer laminate to obtain a second liquid crystal layer laminate;

In the said 2nd liquid crystal layer laminated body, it has a process of removing the 3rd edge part including the edge part of the said adhesive layer of the side where the said at least one edge part is located,

In the removing step, the position of the end of the adhesive layer is the first liquid crystal layer and the side at which the third end is removed in the cross section in the width direction of the second liquid crystal layer laminate after the third end is removed. The manufacturing method of the liquid crystal film which removes the said 3rd edge part so that it may become the same as the position of the at least one edge part of a said 2nd liquid crystal layer.

[14] In the removing step, the position of the end portion of the adhesive layer is located on the side where the third end portion is removed in the cross section in the width direction of the second liquid crystal layer laminate after the third end portion is removed. The manufacturing method of the liquid crystal film as described in [13] which removes the said 3rd edge part so that it may become the same as the position of the edge part of a liquid crystal layer, and it becomes the same as the position of the edge part of a said 2nd liquid crystal layer.

[15] In the cross section of the width direction, the first laminated portion with the adhesive layer has a position at both ends in the width direction of the adhesive layer being wider in the width direction than a position at both ends in the width direction of the first liquid crystal layer.

In the width direction cross section of the said 1st liquid crystal layer laminated body, the position of the width direction both ends of the said contact bonding layer is set in the width direction inside than the position of the width direction both ends of the said 2nd liquid crystal layer,

The said 3rd edge part is a manufacturing method of the liquid crystal film as described in [13] or [14] which is the width direction both ends of a said 2nd liquid crystal layer laminated body.

[16] The step of preparing the first laminated portion with an adhesive layer,

Preparing a first laminate including the first substrate layer and the first liquid crystal layer;

The manufacturing method of the liquid crystal film as described in any one of [1]-[15] which has the process of laminating | stacking an adhesive layer on the opposite side to the said 1st base material layer of a said 1st liquid crystal layer, and obtaining the said 1st laminated part with an adhesion layer.

[17] The surface activation process includes the steps of [1] to [16], wherein the surface activation treatment is performed on the surface of the adhesive layer side of the first laminate with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate. The manufacturing method of the liquid crystal film as described in which.

[18] The method for producing a liquid crystal film according to any one of [1] to [17], wherein the surface activation treatment is corona treatment.

[19] The method for producing a liquid crystal film according to any one of [1] to [18], wherein the first liquid crystal layer is a phase difference layer.

[20] The method for producing a liquid crystal film according to any one of [1] to [19], wherein the second liquid crystal layer is a phase difference layer.

[21] The method for producing a liquid crystal film according to any one of [1] to [20], wherein the first laminated portion with an adhesive layer includes a first alignment layer between the first substrate layer and the first liquid crystal layer.

[22] The method for producing a liquid crystal film according to any one of [1] to [21], wherein the second laminated portion includes a second alignment layer between the second substrate layer and the second liquid crystal layer.

[23] a step of preparing a liquid crystal film produced by the method for producing a liquid crystal film according to any one of [8] and [12] to [15],

Preparing an optical film,

The manufacturing method of the optical laminated body which has a process of peeling the said 1st peeling layer and laminating | stacking on the exposed layer through the adhesive layer for optical films.

[24] The optical laminate according to [23], further comprising the step of peeling the second release layer including the layer not included in the first release layer in the first base layer and the second base layer. Method of preparation.

[25] The method for producing an optical laminate according to [24], wherein the adhesive layer for an optical laminate is laminated on the exposed layer by peeling the second release layer.

According to this invention, the manufacturing method of a liquid crystal film suitable for manufacturing an optical laminated body, and the manufacturing method of an optical laminated body can be provided.

1 (a) to 1 (e) are schematic cross-sectional views schematically showing an example of the manufacturing process of the retardation film which is the liquid crystal film of the present invention.
FIG.2 (a)-FIG.2 (c) are schematic sectional drawing which shows an example of the manufacturing process of the optical laminated body of this invention typically.
FIG.3 (a)-FIG.3 (d) are schematic sectional drawing which shows typically another example of the manufacturing process of the retardation film which is the liquid crystal film of this invention.
4 (a) to 4 (c) are schematic sectional views schematically showing another example of the manufacturing process of the optical laminate of the present invention.
5 (a) to 5 (e) are schematic sectional views schematically showing another example of the manufacturing process of the retardation film which is the liquid crystal film of the present invention.
6 (a) to 6 (e) are schematic sectional views schematically showing another example of the manufacturing process of the retardation film which is the liquid crystal film of the present invention.
7 (a) to 7 (d) are schematic sectional views schematically showing an example of the manufacturing process of the optical laminate, which is the premise of the present invention.

Prior to description of preferable embodiment of the manufacturing method of the liquid crystal film of this invention, and the manufacturing method of an optical laminated body, the premise of embodiment of this invention is demonstrated. 7 (a) to 7 (d) are schematic sectional views schematically showing a manufacturing process of the optical laminated body 70p serving as a premise of the embodiments described later. In the figure, W represents the width direction. In addition, below, the case where a 1st liquid crystal layer and a 2nd liquid crystal layer are a 1st phase difference layer and a 2nd phase difference layer, respectively, and a liquid crystal film is a phase difference film is demonstrated as an example.

In the manufacturing method of an optical laminated body, as shown to FIG. 7 (a), the 1st laminated part 10p containing the 1st base material layer 11p and the 1st retardation layer 12p and the 2nd base material layer The 2nd laminated part 20p containing 21p and the 2nd phase difference layer 22p may use the retardation layer laminated body 40p laminated | stacked through the contact bonding layer 13p. As shown in FIG.7 (b), when this 2nd base material layer 21p is peeled from this retardation layer laminated body 40p, the 2nd phase difference layer 22p of the 2nd base material layer 21p which peeled is carried out. A part shifts and the phase difference film 50p by which the 2nd phase difference layer 22p ₁ was formed on the adhesive layer 13p is obtained. This is a non-fixed region in which the phase difference layer stack 40p illustrated in FIG. 7A is not fixed to the adhesive layer 13p at both ends in the width direction of the second phase difference layer 22p (FIG. 7A). 2nd phase difference layer 22p which has the part shown with the diagonal line which goes to the right side, and is the area | region fixed by the contact bonding layer 13p by peeling of the 2nd base material layer 21p. _It is because it isolate | separates into _1st and the non-fixed area | region which transfers to the 2nd base material layer 21p.

Subsequently, on the second retardation layer 22p ₁ of the retardation film 50p shown in FIG. 7B, as shown in FIG. 7C, the optical film (through the adhesive layer 62p for optical film) After laminating 60p), the 1st base material layer 11p contained in retardation film 50p can be peeled off, and optical laminated body 70p (FIG. 7 (d)) can be obtained.

By the way, in the phase difference layer laminated body 40p as shown to Fig.7 (a), in the width direction edge part, the 1st phase difference layer 12p and the 2nd phase difference layer 22p do not pass through the contact bonding layer 13p. There is an area facing each other without. In such a region, the first retardation layer 12p and the second retardation layer 22p are easily in direct contact with each other, and the intensity of contact between the first retardation layer 12p and the second retardation layer 22p and the first retardation layer Depending on the surface state of 12p and the second retardation layer 22p, as shown in FIG. 7 (a), a part 12'p of the first retardation layer 12p (hereinafter, referred to as a "following portion ( 12'p) ”may move to the second retardation layer 22p. When the transition portion 12'p of the first retardation layer 12p moves to the second retardation layer 22p, a part of the first retardation layer 12p is missing and the first retardation layer 12p is missing. (p) is formed. Omission of the first retardation layer 12p due to the surface state of the first retardation layer 12p and the second retardation layer 22p or the contact state of the first retardation layer 12p and the second retardation layer 22p. The transition part 12'p to the negative part p and the 2nd phase difference layer 22p may generate | occur | produce continuously in the longitudinal direction.

Such a missing portion p is also present in the retardation film 50p as shown in Fig. 7 (b), so that the optical film 60p is applied to the retardation film 50p through the adhesive layer 62p for optical film. When laminated (FIG. 7C), in the area | region of this omission part p, the 1st base material layer 11p and the optical film 60p may adhere | attach through the adhesive layer 62p for optical films. When the 1st base material layer 11p is peeled off in the state in which the said adhesive part was formed, as shown in FIG.7 (d), a part 60'p of the optical film 60p and the adhesive layer 62p for optical films will be carried out. Since part 62'p is being fixed to the 1st base material layer 11p, the optical laminated body 70p obtained breaks | disconnects the optical film 60p and the adhesive layer 62p for optical films at the edge part. It may become. The optical laminated body 70p in which the edge part as shown in FIG.7 (d) is broken is unpreferable since it has a bad appearance, and since traveling property tends to become unstable at the time of conveying the optical laminated body 70p. .

In addition, in the phase difference layer laminated body 40p shown to FIG.7 (a), the transition part 12'p at the time of conveyance of the 2nd base material layer 21p which peeled from the phase difference layer laminated body 40p. In some cases, you may fall out. The transition part 12'p which fell out may adhere to the retardation film 50p and a conveyance path, and may contaminate the product under manufacture, or a conveyance path, and may cause the appearance defect of the optical laminated body obtained. In the retardation layer stack 40p shown in FIG. 7A, a part of the second retardation layer 22p may sometimes shift to the first retardation layer 12p. In these cases, at the time of conveyance of the retardation film, a part of the second retardation layer 22p shifted to the first retardation layer 12p is dropped off and adhered to the retardation film or the conveying path, thereby producing a product or conveying path under manufacture. It may cause contamination, and may cause the appearance defect of the optical laminated body obtained.

Therefore, in the following embodiments, it is difficult to cause breakage of the end portion, contamination of the product or the conveying path during manufacture, etc., thereby suppressing the poor appearance of the optical laminate and the unstable runability at the time of conveyance, thereby manufacturing the optical laminate appropriately. The manufacturing method of the liquid crystal film which can be performed, and the manufacturing method of an optical laminated body are demonstrated.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of the manufacturing method of the liquid crystal film of this invention, and the manufacturing method of an optical laminated body with reference to drawings is demonstrated. In addition, below, the case where a 1st liquid crystal layer and a 2nd liquid crystal layer are a 1st phase difference layer and a 2nd phase difference layer, respectively, and a liquid crystal film is a phase difference film is demonstrated as an example.

[First Embodiment]

(Method for producing retardation film)

1 (a) to 1 (e) are schematic sectional views schematically showing an example of a method of manufacturing the retardation film 50a (liquid crystal film) of the present embodiment. In the figure, W represents the width direction.

The manufacturing method of the phase difference film 50a of this embodiment is, for example.

A process of preparing the first laminated portion 10a with the adhesive layer including the first base layer 11a, the first retardation layer 12a (the first liquid crystal layer), and the adhesive layer 13a in this order (FIG. 1 ( a)),

Preparing a second stacked portion 20a including the second base layer 21a and the second retardation layer 22a (second liquid crystal layer) (FIG. 1B);

Removing the width direction both ends (the 1st end part 14a) of the 1st laminated part 10a with an adhesive layer (FIG. 1 (a) and 1 (c)),

Surface activation treatment of the surface on the adhesive layer 13a ₁ side of the first laminated part 10a ₁ with the adhesive layer after removing the first end 14a and the surface of the second phase difference layer 22a on the second laminated part 20a. Process to do,

The adhesive layer 13a ₁ of the 1st laminated part 10a _{1 with} an adhesive layer after surface activation treatment, and the 2nd phase difference layer 22a of the 2nd laminated part 20a are bonded together, and the phase difference layer laminated body 40a (liquid crystal layer lamination | stacking) is carried out. A process (FIG. 1 (d)) is obtained.

In the width direction cross section, the position of the width direction both ends of the contact bonding layer 13a is the position of the width direction both ends of the 1st phase difference layer 12a in the width direction cross section shown in FIG.1 (a). It is inward in width direction than

The process of removing the 1st edge part 14a shown to FIG. 1 (a) is performed before the surface activation process, and the width direction of the 1st laminated part 10a ₁ with an adhesive layer after removal of the 1st edge part 14a is carried out. In the cross section, the first end 14a is positioned so that the positions of both ends in the width direction of the adhesive layer 13a ₁ are the same as the positions of both ends in the width direction of the first retardation layer 12a ₁ (FIG. 1 (c)). To remove it. The manufacturing method of the retardation film 50a may have the process of peeling the 2nd base material layer 21a (1st peeling layer) further, as shown to FIG. 1 (e).

Hereinafter, it demonstrates concretely based on drawing. In the manufacturing method shown in FIG. 1, the 1st base material with an adhesive layer which contains the 1st base material layer 11a, the 1st phase difference layer 12a, and the contact bonding layer 13a in this order as shown to FIG. 1 (a) first is shown. As shown in Fig. 1 (b), the second laminated portion 20a including the second laminated layer 10a and the second retardation layer 22a is prepared. The 1st laminated part 10a and the 2nd laminated part 20a with an adhesive layer are a long film-like thing, The process mentioned later, conveying the adhesive layered 1st laminated part 10a and the 2nd laminated part 20a continuously is carried out. Is done. The width direction W is a direction orthogonal to the longitudinal direction of a film-shaped object.

Next, about the 1st laminated part 10a with an adhesive layer shown to Fig.1 (a), the width direction both ends are cut | disconnected by the dotted line Xa, and the 1st edge part 14a of the width direction outer side rather than the dotted line Xa is shown. Remove it. Accordingly, as shown in FIG. 1C, the adhesive layer after removal of the first end 14a ₁ having the first base layer 11a ₁ , the first retardation layer 12a ₁ , and the adhesive layer 13a ₁ . The equipped 1st laminated part 10a ₁ (Hereinafter, it may be called "the 1st laminated part 10a ₁ with an adhesive layer.") Is obtained. Subsequently, after surface-activating the surface of the adhesive layer 13a ₁ side of the 1st laminated part 10a _{1 with} an adhesive layer, and the surface of the 2nd phase difference layer 22a side of the 2nd laminated part 20a, it is an adhesive layer provision agent. The adhesive layer 13a ₁ of the 1 laminated part 10a ₁ and the 2nd phase difference layer 22a of the 2nd laminated part 20a are bonded together, and the phase difference layer laminated body 40a shown to FIG. 1 (d) is obtained. . Thereafter, the second base layer 21a (first peeling layer) is peeled from the phase difference layer stack 40a to obtain a phase difference film 50a shown in FIG. 1E.

As for the 1st laminated part 10a with an adhesion layer, in the width direction cross section, as shown to FIG. 1 (a), the position of the width direction both ends of the adhesion layer 13a is the width | variety of the 1st phase difference layer 12a. It is inward from the position of the both ends of a direction. Although the position in the width direction both ends of the contact bonding layer 13a is not specifically limited, It can be set as the area | region 0.2 cm or more from the position of the width direction edge part of the 1st phase difference layer 12a to the width direction inner side, and even if it is 0.5 cm or more area | region. The area may be 1.0 cm or more, more preferably 20 cm or less, and preferably 15 cm or less. In the 1st laminated part 10a with an adhesive layer shown to Fig.1 (a), the position of the width direction both ends of the 1st base material layer 11a is located outside the position of the width direction both ends of the 1st phase difference layer 12a. However, it may be the same as the position of the both ends of the width direction of the 1st phase difference layer 12a.

As for the 2nd laminated part 20a, in the width direction cross section, as shown to FIG. 1 (b), the position of the width direction both ends of the 2nd base material layer 21a of the 2nd phase difference layer 22a It may be outside from the position of the width direction both ends, and may be the same as the position of the width direction both ends of the 2nd phase difference layer 22a.

The position of the dotted line Xa in FIG. 1 (a) is the first laminated portion 10a ₁ with the adhesive layer after the removal of the first end 14a at both ends in the width direction of the first laminated portion 10 with the adhesive layer. The position of both ends of the contact bonding layer 13a _{1 in the} cross section in the width direction of FIG. 1C is determined to be the same as the position of both ends of the first retardation layer 12a ₁ .

In the 1st laminated part 10 with an adhesive layer shown to Fig.1 (a), as for the dotted line Xa, the 1st edge part 14a has the 1st base material layer 11a and the 1st retardation layer 12a normally. It is preferably set to include the end of the first base layer 11a, the first base layer 11a, the first retardation layer 12a and the end of the adhesive layer 13a. The layers included in each of the first end portions 14a removed from the widthwise end portions of the first laminated portion 10a with the adhesive layer may be the same as or different from each other.

The position of the dotted line Xa which defines the area | region of the 1st end part 14a is an area | region normally 0.5 cm or more in width direction inside from the edge part located in the outermost width direction of the 1st laminated part 10a with an adhesive layer, and 1.0 It may be an area of cm or more, an area of 1.5 cm or more, and is usually 20 cm or less, preferably 15 cm or less, and more preferably 10 cm or less. The distance from the edge part located in the outermost width direction of the 1st laminated part 10a with an adhesive layer to the position of the dotted line Xa may be the same at the both ends of the width direction of the 1st laminated part 10a with an adhesive layer, and mutually differs You may.

As surface activation treatment performed on the surface of the adhesive layer 13a ₁ side of the 1st laminated part 10a _{1 with} an adhesive layer, and the surface of the 2nd phase difference layer 22a side of the 2nd laminated part 20a, hydrophilizing a surface The processing for this is mentioned. Specifically, discharge treatments such as corona treatment, plasma treatment and glow discharge; Flame treatment; Ozone treatment; UV ozone treatment; And ionizing active ray treatment such as ultraviolet ray treatment and electron beam treatment. Among these, corona treatment and plasma treatment are preferable, and corona treatment is more preferable.

The degree of surface activating treatment is not particularly limited, but the surface of the adhesive layer having a first layer section (10a ₁₎ the adhesive layer (13a ₁₎ the second retardation layer in the contact angle with water of the surface of the and the second stacking portion (20a) (22a) of It is preferable to process so that the water contact angle of may be less than 100 degrees, It is more preferable to process so that it may be less than 90 degrees, It is further more preferable to process so that it may be less than 80 degrees. When the surface activation treatment is a corona treatment, the throughput can be, for example, 30 to 3000 J / m 2.

In the phase difference layer laminated body 40a, in the width direction cross section, the position of the width direction both ends of the contact bonding layer 13a ₁ is the same as the position of the width direction both ends of the 1st phase difference layer 12a ₁ . The position of the width direction both ends of the 2nd phase difference layer 22a and the 2nd base material layer 21a in the phase difference layer laminated body 40a is not specifically limited. In order to effectively use the full width of the first retardation layer 12a ₁ , the positions of the width direction both ends of the second retardation layer 22a in the retardation layer stack 40a are the width of the adhesive layer 13a ₁ . It is preferable to be at the same or outside the position of the both ends of the direction. Or the like during transportation of the retardation layer laminate (40a), an adhesive layer having a first layer section (10a ₁₎ the adhesive layer (13a ₁₎ is exposed, or the adhesive or pressure-sensitive adhesive constituting the adhesive layer (13a ₁₎ due out becomes empty, or by conveying the In order to prevent contamination of the furnace, at least one of the second retardation layer 22a and the second base material layer 21a is formed at the end of the adhesive layer 13a ₁ at both ends in the width direction of the retardation layer laminate 40a. It is preferred to be at the same or outside of the position.

Retardation film 50a can be obtained by peeling 2nd base material layer 21a (1st peeling layer) from retardation layer laminated body 40a. The retardation film 50a shown in FIG. 1E has a first base layer 11a ₁ , a first retardation layer 12a ₁ , an adhesive layer 13a ₁ , and a second retardation layer 22a ₁ . In the retardation film 50a, in the width direction end surface, the position of the width direction both ends of the 2nd phase difference layer 22a ₁ is the same as the position of the width direction both ends of the contact bonding layer 13a ₁ .

When the 2nd base material layer 21a is peeled from the phase difference layer laminated body 40a shown to FIG. 1 (d), as shown to FIG. 1 (e), the 2nd base material layer 21a is peeled off as a 2nd base material. Part of the phase difference layer 22a is easy to shift. In the retardation layer laminate 40a illustrated in FIG. 1D, in the widthwise cross section, positions of both ends in the width direction of the second retardation layer 22a are positioned at both ends in the width direction of the adhesive layer 13a ₁ . This is because the second retardation layer 22a has a non-fixed region (part shown by the diagonal line rising to the right in FIG. 1 (d)) which is outside the position and is not fixed to the adhesive layer 13a ₁ . Accordingly, when peeling off the second substrate layer (21a) from the phase difference layer laminate (40a), a second retardation layer (22a) shown in Fig. 1 (d) is fixed to the adhesive layer (13a ₁₎ region (Fig. 1 of the second retardation layer (22a ₁₎₎ and a second (non-fixed region (Fig. 1 (d which proceeds to 21a)) and 1 (e) the base layer shown in (e), shown by oblique lines rising rightward Part), and in the cross section in the width direction as shown in Fig. 1 (e), the position of the both ends of the width direction of the second retardation layer 22a ₁ and the adhesive layer of the first laminated portion 10a _{1 with} the adhesive layer. the positions of both ends of the width direction (13a ₁₎ ensures the same phase difference film (50a).

When surface activation treatment is performed in the manufacturing process of the retardation film 50a, especially the retardation layer laminated body 40p demonstrated based on FIG.7 (a)-FIG.7 (d), the 1st phase difference layer ( 12p) and the second retardation layer 22p directly contact each other, part 12'p of the first retardation layer 12p moves to the second retardation layer 22p or part of the second retardation layer 22p. There is a tendency for a phenomenon that the transition to the first retardation layer 12p tends to occur.

On the other hand, in the retardation film 50a obtained by the manufacturing method of this embodiment, the 1st phase difference layer 12a ₁ and the 2nd phase difference layer 22a ₁ oppose through the contact bonding layer 13a ₁ , and the adhesive layer ( There is no region where the first retardation layer 12a ₁ and the second retardation layer 22a _{1 face} without passing through 13a ₁ ). Therefore, in the retardation film 50a, since the first retardation layer 12a ₁ and the second retardation layer 22a ₁ do not directly contact each other, part of the first retardation layer 12a ₁ is the second retardation. It is possible to prevent the transition to the layer 22a ₁ and the transition of the part of the second phase difference layer 22a ₁ to the first phase difference layer 12a ₁ . Thereby, when manufacturing the optical laminated body 70a mentioned later using the retardation film 50a, it can suppress that the edge part of the optical laminated body 70a is broken, and also the contamination of the product and conveyance path currently being manufactured Can be suppressed.

(Method for Producing Optical Laminate)

FIG.2 (a)-FIG.2 (c) are schematic sectional drawing which shows an example of the manufacturing method of the optical laminated body 70a of this embodiment typically. In the figure, W represents the width direction.

The manufacturing method of the optical laminated body 70 of this embodiment is a process of preparing the retardation film 50a, (FIG. 2 (a)),

The process of preparing the optical film 60a (FIG. 2 (a)),

A step of laminating the optical film (60a), the optical through for the adhesive layer (62a) loaded with a second base layer (21a) (first release layer) was peeled off the exposed second phase difference layer (22a ₁₎ (2 (b)).

Method for producing an optical layered product (70a) of this embodiment, also, the first base layer (11a ₁₎ may optionally have a step of peeling off the (second release layer) (Fig. 2 (c)), the first base The adhesive layer for optical laminates may be laminated on the first retardation layer 12a ₁ exposed by peeling the layer 11a ₁ .

Hereinafter, it demonstrates concretely based on drawing. In the manufacturing method of the optical laminated body 70a shown to FIG. 2C, first, as shown to FIG. 2A, the retardation film 50a and the optical film 60a are prepared. The retardation film 50a and the optical film 60a are long film-like objects, and the process mentioned later is carried out continuously conveying the retardation film 50a and the optical film 60a.

Then, also stacked in Figure 2 (b) as described above, the second retardation layer, a retardation film (50a) via an optical film (60a) to the optical film the adhesive layer (62a) for (22a ₁₎ as shown in. At this time, the optical film adhesive layer 62a may be provided on the optical film 60a, and the optical film adhesive layer 62a may be bonded to the second retardation layer 22a ₁ of the retardation film 50a. The optical film adhesive layer 62a and the optical film 60a may be bonded to the optical film adhesive layer 62a on the second retardation layer 22a ₁ of the retardation film 50a.

After laminating the optical film 60a and the retardation film 50a through the adhesive layer 62a for optical film, the first base layer 11a ₁ (second peeling layer) included in the retardation film 50a is peeled off. And the optical laminated body 70a shown in FIG.2 (c). Optical laminate (70a) is, as shown in FIG. 2 (c), a first retardation layer (12a _1), the adhesive layer (13a _1), a second retardation layer (22a _1), an adhesive layer for an optical film (62a) And the optical film 60a are laminated in this order. Optical laminate (70a), the first of the first phase retardation layer (12a _1), may form an optical laminate cheyong adhesive layer (not shown) exposed by peeling off the substrate layer (11a _1). The adhesive layer for optical laminated bodies can be used when bonding to display panels, such as an organic electroluminescence display and a liquid crystal display device.

The position of the both ends of the width direction of the optical film 60a is the width direction cross section of the optical laminated body 70a among the 2nd phase difference layer 22a ₁ , the contact bonding layer 13a ₁ , and the 1st phase difference layer 12a ₁ . It may be the same as the position of either end of the width direction, and may differ from any of these. For example, the length in the width direction of the optical film (60a), Figure 2 (c), as shown in the second of which is a phase difference layer (22a _1), the adhesive layer (13a ₁₎ and a first retardation layer (12a ₁₎ It may be longer and may be shorter than any of these layers.

It is preferable that the position of the width direction both ends of the adhesive layer 62a for optical films is the same as or more inside than the position of the width direction both ends of the optical film 60a in the width direction cross section of the optical laminated body 70a. In addition, the position of the both ends of the width direction of the adhesive layer 62a for optical films is the position of the both ends of the width direction of any one of the 2nd phase difference layer 22a ₁ , the contact bonding layer 13a ₁ , and the 1st phase difference layer 12a ₁ . It is preferable that it is the same or more than the width direction inside. Thereby, when conveying the optical laminated body 70a, the adhesive layer 62a for optical films protrudes outward to the width direction of the optical laminated body 70a, and adheres to a conveyance path, and contaminates a conveyance path. It can prevent.

As described above, in the retardation film 50a shown in FIG. 1E, since the first retardation layer 12a ₁ and the second retardation layer 22a ₁ do not directly contact each other, the first retardation layer ( short of a portion of the _first 12a) moves to a second phase difference layer (22a ₁₎ a portion of the second retardation layer (22a ₁₎ can be prevented from implementing the first phase difference layer (12a _1). Therefore, the omission part p does not generate | occur | produce in the 1st phase difference layer 12p like the phase difference layer laminated body 40p demonstrated based on FIG.7 (a)-FIG.7 (d), and the optical laminated body 70p. It is possible to suppress the breakage of the end portion, to suppress the contamination of the product and the conveying path under manufacture, and to manufacture the optical laminated body 70a shown in Fig. 2C.

The manufacturing method of the retardation film of this embodiment and the manufacturing method of an optical laminated body may be changed like the modification shown below. The above-described embodiments and the modifications shown below may be arbitrarily combined.

(Modification 1 of the first embodiment)

In the manufacturing method of this embodiment, one 1st end part 14a of the width direction of the 1st laminated part 10a with an adhesive layer may be removed. In this case, at the side from which the 1st end part 14a was removed, it can suppress that the edge part of an optical laminated body is broken, and it can suppress that the product and conveyance path under manufacture are contaminated.

(Modification 2 of First Embodiment)

In the manufacturing method of this embodiment, only one surface may be surface activated. Since the adhesive layer 13a ₁ of the 1st laminated part 10a _{1 with} an adhesive layer and the 2nd phase difference layer 22a of the 2nd laminated part 20a become easy to adhere together favorably, surface activation treatment is an adhesive layered agent. to perform a second surface sides of the retardation layer (22a) side of the first layer section (10a ₁₎ the adhesive layer (13a ₁₎ side surface and the second stacking portion (20a) of the preferred.

In the manufacturing method of this embodiment, you may perform surface activation treatment on the surface of the contact bonding layer 13a side of the 1st laminated part 10a with a contact bonding layer before removing the 1st edge part 14a. Also in this case, the surface of the adhesive layer 13a side of the 1st laminated part 10a with an adhesive layer before removing the 1st edge part 14a, and the surface of the 2nd phase difference layer 22a side of the 2nd laminated part 20a. The surface activation treatment may be performed only on one surface of the surface. Surface activation treatment, so that the effect is exhibited effectively, it is preferable to carry out with respect to the first end provided with an adhesive layer and after (14a) to remove the first layer section (10a _1).

(Modification 3 of First Embodiment)

In the manufacturing method of this embodiment, only the position of the one edge part of the width direction of an adhesive layer may be inner side of the width direction rather than the position of the edge part of a 1st phase difference layer. In this case, what is necessary is just to remove the 1st end part of said one end side of the contact bonding layer in a 1st laminated part with an adhesive layer in the process of removing a 1st end part.

(Modification 4 of First Embodiment)

In the production method of the present embodiment, the first separation layer may be a first substrate layer (11a _1), and the second release layer to the second substrate layer (21a). In this case, the optical film is laminated on the first retardation layer 12a ₁ exposed by peeling off the first base layer 11a ₁ through the adhesive layer for the optical film, and the second base layer 21a is peeled off and exposed. 2 may be formed of an optical multilayer cheyong adhesive layer on the retardation layer (22a _1). Alternatively, an adhesive layer for an optical laminate is first laminated on the first retardation layer 12a ₁ exposed by peeling off the first base layer 11a ₁ , and then the second base layer 21a is peeled off to expose the exposed agent. 2 or may be a laminated optical film through an adhesive layer for an optical film on the phase difference layer (22a _1).

Second Embodiment

(Method for producing retardation film)

FIG.3 (a)-FIG.3 (d) are schematic sectional drawing which shows an example of the manufacturing method of the retardation film 50b (liquid crystal film) of this embodiment typically. In the figure, W represents the width direction. The manufacturing method of the retardation film 50b of this embodiment is

A process of preparing the first laminated portion 10b with an adhesive layer comprising the first base layer 11b, the first retardation layer 12b (the first liquid crystal layer), and the adhesive layer 13b in this order (Fig. 3 ( a)),

Preparing a second stacked portion 20b including a second substrate layer 21b and a second retardation layer 22b (second liquid crystal layer) (FIG. 3B);

Surface-activating the surface of the adhesive layer 13b side of the first laminated portion 10b with the adhesive layer and the surface of the second phase difference layer 22b side of the second laminated portion 20b;

A process of joining the adhesive layer 13b of the 1st laminated part 10b with an adhesive layer and the 2nd phase difference layer 22b of the 2nd laminated part 20b, and obtaining the phase difference layer laminated body 40b (liquid crystal layer laminated body) ( 3 (c)).

As for the 1st laminated part 10b with an adhesive layer shown to Fig.3 (a), in the width direction cross section, the position of the width direction both ends of the adhesive layer 13b is the position of the width direction both ends of the 1st phase difference layer 12b. It is inward in width direction than

As for the phase difference layer laminated body 40b shown to FIG. 3 (c), in the width direction cross section, the position of the width direction both ends of the contact bonding layer 13b differs from the position of the width direction both ends of the 2nd phase difference layer 22b. same. The manufacturing method of the retardation film 50b may also have the process (FIG. 3 (d)) which peels the 2nd base material layer 21b (1st peeling layer).

Hereinafter, it demonstrates concretely based on drawing. In the manufacturing method shown in FIG. 3, the 1st base material with an adhesive layer which contains the 1st base material layer 11b, the 1st phase difference layer 12b, and the contact bonding layer 13b in this order as shown to FIG. As shown in the laminated part 10b and FIG.3 (b), the 2nd laminated part 20b containing the 2nd base material layer 21b and the 2nd phase difference layer 22b is prepared. The 1st laminated part 10b and the 2nd laminated part 20b with an adhesive layer are a long film-like thing, The process mentioned later, conveying the adhesive layered 1st laminated part 10b and the 2nd laminated part 20b continuously is carried out. Is done. The width direction W is a direction orthogonal to the longitudinal direction of a film-shaped object.

About the 1st base material layer 11b, the 1st phase difference layer 12b, and the contact bonding layer 13b which the 1st laminated part 10b with an adhesive layer has, the 1st laminated part with an adhesive layer shown in FIG.1 (a) ( Since it is the same as that of the 1st base material layer 11a, the 1st phase difference layer 12a, and the contact bonding layer 13a which 10a has, the description is abbreviate | omitted.

As for the 2nd laminated part 20b shown to FIG. 3 (b), in the width direction cross section, the position of the width direction both ends of the 2nd base material layer 21b is the width direction both ends of the 2nd phase difference layer 22b. It is the same as the position of.

Subsequently, after surface-activating the surface of the adhesive layer 13b side of the 1st laminated part 10b with an adhesive layer, and the surface of the 2nd phase difference layer 22b side of the 2nd laminated part 20b, the 1st laminated body with an adhesive layer was laminated. The adhesive layer 13b of the part 10b and the 2nd phase difference layer 22b of the 2nd laminated part 20b are bonded together, and the phase difference layer laminated body 40b shown to FIG. 3 (c) is obtained. Thereafter, the second base layer 21b (first peeling layer) is peeled from the phase difference layer stack 40b to obtain a phase difference film 50b shown in FIG. 3 (d).

The surface activation treatment performed on the surface of the adhesive layer 13b side of the 1st laminated part 10b with an adhesive layer, and the surface of the 2nd phase difference layer 22b side of the 2nd laminated part 20b was demonstrated in previous embodiment. Can be done as In the surface activation process of this embodiment, the surface of the adhesive layer 13b side of the 1st phase difference layer 12b of the 1st laminated part 10b with an adhesive layer, and the surface (first phase difference layer 12b) of the adhesion layer 13b, Is preferably treated so that the water contact angle of each of the surface on the opposite side) and the surface of the second retardation layer 22b (the surface opposite to the second base layer 21b) is less than 100 °, and less than 90 °. It is more preferable to process, and it is further more preferable to process so that it may be less than 80 degrees.

As shown in FIG.3 (c), the phase difference layer laminated body 40b has the position of the width direction both ends of the contact bonding layer 13b 2nd laminated part 20b (2nd base material). It is preferable that it is the same as the position of the both ends of the width direction of the layer 21b and the 2nd phase difference layer 22b. By peeling the 2nd base material layer 21b from the obtained retardation layer laminated body 40b, the retardation film 50b shown to FIG. 3 (d) can be obtained.

When surface activation treatment is performed in the manufacturing process of the retardation film 50a, especially the retardation layer laminated body 40p demonstrated based on FIG.7 (a)-FIG.7 (d), the 1st phase difference layer ( 12p) and the second retardation layer 22p directly contact each other, part 12'p of the first retardation layer 12p moves to the second retardation layer 22p or part of the second retardation layer 22p. There is a tendency for a phenomenon that the transition to the first retardation layer 12p tends to occur.

On the other hand, in the retardation film 50b obtained by the manufacturing method of this embodiment, the 1st retardation layer 12b and the 2nd retardation layer 22b oppose through the contact bonding layer 13b, and the contact bonding layer 13b is There is no region where the first retardation layer 12b and the second retardation layer 22b face each other without passing through. Therefore, in the retardation film 50b, since the first retardation layer 12b and the second retardation layer 22b do not directly contact each other, a part of the first retardation layer 12b is the second retardation layer 22b. ) And a part of the second retardation layer 22b can be prevented from moving to the first retardation layer 12b. Thereby, when manufacturing the optical laminated body 70b mentioned later using the retardation film 50b, it can suppress that the edge part of the optical laminated body 70b is broken, and also the contamination of the product and conveyance path currently being manufactured Can be suppressed.

(Method for Producing Optical Laminate)

4 (a) to 4 (c) are schematic sectional views schematically showing an example of a manufacturing method of the optical laminated body 70b of the present embodiment. In the figure, W represents the width direction. The manufacturing method shown in FIG.4 (c) is

The process of preparing the retardation film 50b (FIG. 4 (a)),

The process of preparing the optical film 60b (FIG. 4 (a)),

The process of laminating | stacking the 2nd base material layer 21b (1st peeling layer) to the exposed 2nd phase difference layer 22b through the adhesive layer 62b for optical films, and laminating | stacking the optical film 60b (FIG. 4 ( b)).

The manufacturing method of the optical laminated body 70b of this embodiment may have the process of peeling the 1st base material layer 11b (2nd peeling layer) further (FIG. 4 (c)), and a 1st base material layer You may laminate | stack an adhesive layer for optical laminated bodies on the 1st phase difference layer 12b ₁ exposed by peeling (11b).

Hereinafter, it demonstrates concretely based on drawing. In the manufacturing method shown in FIG. 4, first, as shown in FIG.4 (a), the retardation film 50b and the optical film 60b are prepared. The retardation film 50b and the optical film 60b are long film-like objects, and the process mentioned later is carried out continuously conveying the retardation film 50b and the optical film 60b.

Subsequently, as shown in FIG.4 (b), the optical film 60b is laminated | stacked on the 2nd phase difference layer 22b of the phase difference film 50b through the adhesive layer 62b for optical films. At this time, the optical film adhesive layer 62b may be provided on the optical film 60b, and the optical film adhesive layer 62b and the second retardation layer 22b of the retardation film 50b may be bonded to each other. The optical film adhesive layer 62b and the optical film 60b may be bonded to the optical film adhesive layer 62b on the second retardation layer 22b of the film 50b.

After laminating | stacking the optical film 60b and the retardation film 50b through the adhesive layer 62b for optical films, by peeling the 1st base material layer 11 (2nd peeling layer) contained in the retardation film 50b, The optical laminated body 70b shown to FIG. 4 (c) can be obtained. Optical laminate (70b) is, Fig. 4 (c), as shown in, the first phase difference layer (12b _1), an adhesive layer (13b), a second retardation layer (22b), the optical film for the adhesive layer (62b) and the optical The film 60b is laminated | stacked in this order.

In the width direction cross section of the optical laminated body 70b, the position of the width direction both ends of the 1st phase difference layer 12b ₁ is the same as the position of the width direction both ends of the contact bonding layer 13b.

When the 1st base material layer 11b is peeled off, a part of 1st phase difference layer 12b is easy to transfer to the peeled 1st base material layer 11b, as shown to FIG. 4 (c). In the laminated body shown in FIG.4 (b), in the width direction cross section, the position of the width direction both ends of the 1st phase difference layer 12b is located in the width direction outer side rather than the position of the width direction both ends of the contact bonding layer 13b. This is because the first retardation layer 12b has an unfixed region (part shown by diagonal lines rising to the right in FIG. 4B) which is not fixed to the adhesive layer 13. Therefore, when the 1st base material layer 11b is peeled from the laminated body shown in FIG. 4B, the 1st phase difference layer 12b shown in FIG. 4B will be the area | region fixed to the contact bonding layer 13b ( The first retardation layer 12b ₁ shown in FIG. 4C and the non-fixed region (FIG. 4B and FIG. 4C) shifting to the right in the transition to the first base layer 11b. 4, the position of the both ends of the width direction of the 1st phase difference layer 12b ₁ , and the position of the both ends of the adhesion layer 13 in the width direction cross section, as shown to FIG. 4 (c). The same optical laminated body 70b can be obtained.

The optical laminated body 70b may form the adhesive layer for optical laminated bodies not shown in figure on the 1st phase difference layer 12b ₁ exposed by peeling the 1st base material layer 11b. The adhesive layer for optical laminated bodies can be used when bonding to display panels, such as an organic electroluminescence display and a liquid crystal display device.

The position of the width direction both ends of the optical film 60b is any one of the 2nd phase difference layer 22b, the contact bonding layer 13b, and the 1st phase difference layer 12b _{1 in} the width direction cross section of the optical laminated body 70b. It may be the same as the position of the both ends of the width direction, and may differ from any of these. For example, the length of the width direction of the optical film 60b is longer than any of the 2nd phase difference layer 22b, the contact bonding layer 13b, and the 1st phase difference layer 12b ₁ , as shown to FIG. 4 (c). It may be shorter than any of these layers.

It is preferable that the position of the width direction both ends of the adhesive layer 62b for optical films is the same as the position of the width direction both ends of the optical film 60b in the width direction cross section of the optical laminated body 70b, or it is inside the width direction more than that. Do. In addition, the position of both ends in the width direction of the optical film, an adhesive layer (62b) for the second retardation layer (22b), an adhesive layer (13b) and a first retardation layer (12b ₁₎ is co-located with the any two ends of a width direction or in rather It is preferable that it is inside in the width direction. Thereby, when conveying the optical laminated body 70b, the adhesive layer 62b for optical films protrudes outward to the width direction of the optical laminated body 70b, and adheres to a conveyance path, and contaminates a conveyance path. You can prevent it.

In the retardation film 50b shown in FIG. 3D, since the first retardation layer 12b ₁ and the second retardation layer 22b do not directly contact each other, part of the first retardation layer 12b ₁ It is possible to prevent the transition to the second retardation layer 22b and the transition of the part of the second retardation layer 22b to the first retardation layer 12b ₁ . Therefore, the omission part p does not generate | occur | produce in the 1st phase difference layer 12p like the phase difference layer laminated body 40p demonstrated based on FIG.7 (a)-FIG.7 (d), and the optical laminated body 70p. It is possible to suppress the breakage of the end portion, to suppress the contamination of the product and the conveying path under manufacture, and to manufacture the optical laminated body 70b shown in Fig. 4C.

The manufacturing method of the retardation film of this embodiment and the manufacturing method of an optical laminated body may be changed like the modification shown below. Moreover, you may arbitrarily combine the above-mentioned embodiment and the modification shown below.

(Modification 1 of the second embodiment)

In the manufacturing method of this embodiment, the position of the width direction both ends of the contact bonding layer 13b may be outer side than the position of the width direction both ends of a 2nd laminated part (2nd base material layer and 2nd phase difference layer).

(Modification 2 of Second Embodiment)

In the manufacturing method of this embodiment, you may use what has a structure similar to the 2nd laminated part 20a shown to FIG. 1 (b) demonstrated by previous embodiment.

In this case, in the width direction cross section of a phase difference layer laminated body, you may obtain a phase difference layer laminated body so that the position of the width direction both ends of an adhesive layer may be the same as the position of the width direction both ends of a 2nd phase difference layer, and the width direction both ends of an adhesive layer The retardation layer laminate may be obtained so that the position of is in the outer side than the positions of both ends in the width direction of the second retardation layer.

In the phase difference layer laminated body obtained using the 2nd laminated part whose position of the width direction both ends of a 2nd base material layer is outside than the position of the width direction both ends of a 2nd phase difference layer, the position of the width direction both ends of an adhesive layer is 2nd When it exists outside the position of the width direction both ends of a phase difference layer, a 2nd base material layer and an adhesive layer may adhere | attach. When a 2nd base material layer and an adhesive layer adhere | attach, it will become difficult to peel a 2nd base material layer, and it exists in the tendency which becomes difficult to obtain retardation film. In this case, in the cross section in the width direction of the phase difference layer laminate, the second phase is easily removed by removing both ends of the phase difference layer laminate so that the positions of both ends in the width direction of the adhesive layer are the same as the positions of both ends in the width direction of the second substrate layer. The base material layer can be peeled off. Or, the width direction both ends are removed previously from the 2nd laminated part 20b shown in FIG.1 (b), the 2nd laminated part 20b shown in FIG.3 (b) is obtained, and this 2nd laminated part ( 20b) may be used to obtain the retardation layer laminate 40b and the retardation film 50b in the steps described based on FIGS. 3C and 3D.

(Modification 3 of Second Embodiment)

In the manufacturing method of this embodiment, only one surface may be surface activated. Since the adhesive layer 13b of the 1st laminated part 10b with an adhesive layer and the 2nd phase difference layer 22b of the 2nd laminated part 20b become easy to adhere together favorably, the surface activation process is the 1st laminated part with an adhesive layer. It is preferable to perform on both the surface of the adhesive layer 13b side of (10b), and the surface of the 2nd phase difference layer 22b side of the 2nd laminated part 20b.

(Modification 4 of 2nd Embodiment)

In the manufacturing method of this embodiment, only the position of one edge part of the width direction of an adhesive layer may be inner side of the width direction rather than the position of the edge part of a 1st phase difference layer.

In this case, what is necessary is just to make the position of the said one edge part of a contact bonding layer in the width direction end surface in the retardation layer laminated body being the same as the position of the edge part of a 2nd phase difference layer, or more outside the width direction.

(Modification 5 of the second embodiment)

In the manufacturing method of this embodiment, the 1st peeling layer may be 1st base material layer 11b, and the 2nd peeling layer may be 2nd base material layer 21b. In this case, what is necessary is just to laminate | stack an optical film through the adhesive layer for optical films on the 1st phase difference layer which peeled and exposed the 1st base material layer 11b. In the phase difference layer laminated body 40b shown to FIG. 3 (c), the position of the width direction both ends of the 1st phase difference layer 12b is outside the position of the width direction both ends of the contact bonding layer 13b, and the 1st phase difference layer The non-fixed region 12b is not fixed to the adhesive layer 13b and the region fixed to the adhesive layer 13b. Therefore, when peeling off the 1st base material layer 11b, the 1st phase difference layer 12b will be easy to isolate | separate into the non-fixed area | region of the 1st phase difference layer 12b, and the area | region fixed to the contact bonding layer 13b. Therefore, when making a 1st peeling layer into the 1st base material layer 11b, an optical film can be laminated | stacked through the adhesive layer for optical films on the area | region fixed to the contact bonding layer 13b of the 1st phase difference layer 12b. have. In addition, when a 1st peeling layer contains a 1st base material layer, what is necessary is just to form the adhesive layer for optical laminated bodies in the 2nd phase difference layer 22b exposed by peeling the 2nd base material layer 21b.

Or, the adhesive layer for optical laminated bodies is laminated | stacked on the exposed 1st phase difference layer by peeling the 1st base material layer 11b, Then, the 2nd base material layer 21b is peeled and optically exposed on the exposed 2nd phase difference layer You may laminate | stack an optical film through the adhesive layer for films.

[Third Embodiment]

(Method for producing retardation film)

5 (a) to 5 (e) are schematic sectional views schematically showing an example of a manufacturing method of the retardation film 50c (liquid crystal film) of the present embodiment. In the figure, W represents the width direction. The manufacturing method of the retardation film 50c of this embodiment is, for example.

A process of preparing the first laminated portion 10c with an adhesive layer comprising the first base material layer 11c, the first retardation layer 12c (the first liquid crystal layer), and the adhesive layer 13c in this order (FIG. 5 ( a)),

Preparing a second laminated portion 20c including a second base layer 21c and a second retardation layer 22c (second liquid crystal layer) (FIG. 5B);

Surface-activating the surface of the adhesive layer 13c side of the first laminated portion 10c with the adhesive layer and the surface of the second phase difference layer 22c side of the second laminated portion 20c;

Bonding the adhesive layer 13c of the first laminated portion 10c with the adhesive layer and the second retardation layer 22c of the second laminated portion 20c to obtain a phase difference layer stack 40c (liquid crystal layer stack); (FIG. 5 (c)),

It has a process (FIG. 5 (d)) which removes the width direction both ends (2nd end part 44c) of the phase difference layer laminated body 40c.

As for the 1st laminated part 10c with an adhesive layer shown to FIG. 5 (a), in the width direction cross section, the position of the width direction both ends of the adhesive layer 13c is the position of the width direction both ends of the 1st phase difference layer 12c. It is inward in width direction than

As for the phase difference layer laminated body 40c shown to FIG. 5C, in the width direction cross section, the position of the width direction both ends of the contact bonding layer 13c is wider than the position of the width direction edge part of the 2nd phase difference layer 22c. Inward direction,

In the process of removing the 2nd edge part 44c shown to FIG. 5 (c), the width direction of retardation layer laminated body 40c ₁ (liquid crystal layer laminated body after 2nd edge edge removal) after 2nd edge part 44c removal. In cross section, the positions of both ends in the width direction of the adhesive layer 13c ₁ are the same as the positions of both ends in the width direction of the first retardation layer 12c ₁ and the positions of both ends in the width direction of the second retardation layer 22c ₁ . The second end 44c is removed to be equal to (Fig. 5 (d)). Method of manufacturing a retardation film (50c) is, also, a second substrate layer (21c ₁₎ (first release layer) may have a step of peeling (Fig. 5 (e)).

Hereinafter, it demonstrates concretely based on drawing. In the manufacturing method shown in FIG. 5, the 1st base material with an adhesive layer which contains the 1st base material layer 11c, the 1st phase difference layer 12c, and the contact bonding layer 13c in this order as shown to FIG. 5 (a) first is shown. As shown in Fig. 5 (b), the second laminated portion 20c including the second laminated layer 10c and the second retardation layer 22c is prepared. The 1st laminated part 10c and the 2nd laminated part 20c with an adhesive layer are long film-form objects, The process mentioned later is carried out continuously conveying the 1st laminated part 10c and 2nd laminated part 20c with an adhesive layer. Is done. The width direction W is a direction orthogonal to the longitudinal direction of a film-shaped object.

About the 1st base material layer 11c, the 1st phase difference layer 12c, and the contact bonding layer 13c which the 1st laminated part 10c with an adhesion layer have, the contact bonding layer shown in FIG. 1 (a) demonstrated in previous embodiment. Since it is the same as that of the 1st base material layer 11a, the 1st phase difference layer 12a, and the contact bonding layer 13a which the equipped 1st laminated part 10a has, the description is abbreviate | omitted. In addition, about the 2nd base material layer 21c and the 2nd phase difference layer 22c which the 2nd laminated part 20c has, the 2nd laminated part 20a shown to FIG. 1 (b) demonstrated by previous embodiment. Since it is the same as that of the 2nd base material layer 21a and the 2nd phase difference layer 22a which a has, the description is abbreviate | omitted.

Subsequently, after surface-activating the surface of the adhesive layer 13c side of the 1st laminated part 10c with an adhesive layer, and the surface of the 2nd phase difference layer 22c side of the 2nd laminated part 20c, the 1st laminated body with an adhesive layer was laminated. The adhesive layer 13c of the part 10c and the 2nd phase difference layer 22c of the 2nd laminated part 20c are bonded together, and the phase difference layer laminated body 40c shown to FIG. 5 (c) is obtained. In the width direction end surface of the obtained retardation layer laminated body 40c, as shown in FIG.5 (c), the position of the width direction both ends of the contact bonding layer 13c is the width direction edge part of the 2nd phase difference layer 22c. It is inward from the position of.

The surface activation treatment performed on the surface of the adhesive layer 13c side of the 1st laminated part 10c with an adhesive layer, and the surface of the 2nd phase difference layer 22c side of the 2nd laminated part 20c was demonstrated in previous embodiment. The water contact angle of each surface after the surface activation treatment is also the same as described in the above embodiment.

Subsequently, with respect to the phase difference layer laminated body 40c shown to FIG. 5C, the width direction both ends are cut | disconnected by the dotted line Xc, and the 2nd edge part 44c of the width direction outer side rather than the dotted line Xc is removed. do. Accordingly, as shown in FIG. 5D, the first base layer 11c ₁ , the first retardation layer 12c ₁ , the adhesive layer 13c ₁ , the second retardation layer 22c ₁ , and the second base material The retardation layer laminate 40c ₁ (hereinafter, referred to as "retardation layer laminate 40c ₁ ") after the removal of the second end 44c having the layer 21c ₁ in this order is obtained. . Thereafter, the second base layer 21c ₁ (first peeling layer) is peeled from the phase difference layer stack 40c ₁ to obtain a phase difference film 50c shown in FIG. 5E.

The position of the dotted line Xc in FIG. 5 (c) is the position of both ends of the width direction of the adhesive layer 13c _{1 in the} cross section in the width direction of the phase difference layer stack 40c ₁ after the removal of the second end 44c. Is determined to be the same as the position of both ends of the width direction of the first retardation layer 12c ₁ and the same as the position of both ends of the width direction of the second retardation layer 22c ₁ . In the phase difference layer laminated body 40c shown to FIG. 5C, as for the position of the dotted line Xc, as for the 2nd edge part 44c, the 1st base material layer 11c, the 1st phase difference layer 12c, the 1st It is set so that the edge part of the 2nd phase difference layer 22c and the 2nd base material layer 21c may be included, and the 1st base material layer 11c, the 1st phase difference layer 12c, the contact bonding layer 13c, and the 2nd phase difference layer 22c And an end of the second base layer 21c. The layers included in each of the second end portions 44c removed from both ends in the width direction of the phase difference layer stack 40c may be the same as or different from each other.

In the retardation layer laminate 40c ₁ obtained by removing the second end 44c, as shown in FIG. 5 (d), the positions of both ends of the adhesive layer 13c ₁ in the width direction in the width direction end face thereof. The first base layer 11c ₁ , the first retardation layer 12c ₁ , the second retardation layer 22c ₁ , and the second base layer 21c ₁ are positioned at the same position at both ends in the width direction.

The position of the dotted line Xc which defines the area | region of the 2nd end part 44c is an area | region normally 0.5 cm or more in width direction inside from the edge part located in the outermost width direction of the phase difference layer laminated body 40c, and is 1.0 cm or more. It may be an area, an area of 1.5 cm or more, and is usually 20 cm or less, preferably 15 cm or less, and more preferably 10 cm or less. The distance from the edge part located in the outermost width direction of the phase difference layer laminated body 40c to the position of the dotted line Xc may be the same at both ends of the width direction of the phase difference layer laminated body 40c, and may mutually differ.

A retardation film (50c) can be obtained by peeling off the second substrate layer (21c ₁₎ (first release layer) from the phase difference layer laminate (40c _1). As shown in FIG. 5E, the retardation film 50c includes the first base layer 11c ₁ , the first retardation layer 12c ₁ , the adhesive layer 13c ₁ , and the second retardation layer 22c ₁ . Has In the phase difference film (50c), in the width direction cross-section, the position of both ends in the width direction of the bonding layer (13c _1), a first base layer (11c _1), a first retardation layer (12c ₁₎ and a second retardation layer ( 22c ₁₎ it may be the same as the position of both ends in the width direction.

As for the phase difference layer laminated body 40c shown to FIG. 5C, in the width direction cross section, the position of the width direction both ends of the contact bonding layer 13c is the position of the width direction both ends of the 1st phase difference layer 12c, and The position of the second retardation layer 22c is higher than the position of the end portion in the width direction. Therefore, similarly to the retardation layer laminated body 40p shown in FIG.7 (a) mentioned above, when the 1st retardation layer 12c and the 2nd retardation layer 22c directly contact, the 1st retardation layer 12c There is a tendency that a part of the transition to the second retardation layer 22c or a part of the second retardation layer 22c transitions to the first retardation layer 12c tends to occur.

Therefore, in this embodiment, the phase difference layer laminated body after removing the width direction both ends (2nd end part 44c) of the phase difference layer laminated body 40c (FIG. 5 (d)), and removing the 2nd end part 44c ( In the cross section of the width direction of 40c ₁ ), the positions of both ends in the width direction of the adhesive layer 13c ₁ are the same as the positions of both ends of the width direction of the first retardation layer 12c ₁ , and the second phase difference layer 22c ₁ is used. It is made to be the same as the position of the both ends of the width direction. Therefore, in the width direction both ends of the phase difference layer laminated body 40c shown to FIG. 5C, a part of 1st phase difference layer 12c moves to 2nd phase difference layer 22c, or 2nd phase difference layer Even if a phenomenon that part of the 22c moves to the first retardation layer 12c occurs, the portion where such a phenomenon occurs can be removed as the second end 44c. Thereby, since the retardation film 50c can be manufactured from the retardation layer laminated body 40c ₁ after removing the 2nd edge part 44c, when manufacturing an optical laminated body using this retardation film 50c, It can suppress that the edge part of a laminated body is broken, and also the contamination of the product and conveyance path in manufacture can be suppressed.

(Method for Producing Optical Laminate)

The manufacturing method of the optical laminated body of this embodiment is

Preparing a retardation film 50c,

Preparing an optical film,

An optical film, with an adhesive layer for an optical film, and the second has a step of laminating the base material layer (21c ₁₎ (first release layer) was peeled off the exposed second phase difference layer (22c _1).

The method for producing an optical layered product of the present embodiment, also, the first base layer (11c ₁₎ may optionally have a step of peeling off the (second release layer), exposed by peeling the first base layer (11c ₁₎ the laminate may be a laminated optical cheyong adhesive layer on the first phase difference layer (12c _1).

Since the manufacturing method of the optical laminated body of this embodiment is the same as that of the manufacturing method demonstrated based on FIG.2 (a)-FIG.2 (c) except using the retardation film 50c, detailed description is abbreviate | omitted.

In the retardation film 50c shown in FIG. 5E, in the retardation layer stack 40c, the first retardation layer 12c and the second retardation layer 22c directly contact each other, and the missing portion p is provided. The part where the transition part derived from a missing part may arise is removed as the 2nd end part 44c. Therefore, as shown in the optical laminated body 70p demonstrated based on FIG.7 (a)-FIG.7 (d), it is suppressed that an edge part is broken, it suppresses the contamination of the product and a conveyance path under manufacture, and optically suitably The laminate can be produced.

The manufacturing method of the retardation film of this embodiment and the manufacturing method of an optical laminated body may be changed like the modification shown below. Moreover, you may arbitrarily combine the above-mentioned embodiment and the modification shown below.

(Modification 1 of the third embodiment)

In the manufacturing method of the present embodiment, the second end 44c in one of the width directions of the phase difference layer stack 40c may be removed. In this case, in the side from which the 2nd edge part 44c was removed, it can suppress that the edge part of an optical laminated body is broken, and it can suppress that the product and conveyance path under manufacture are contaminated.

(Modification 2 of the third embodiment)

In the manufacturing method of this embodiment, the position of the width direction both ends of the contact bonding layer 13c ₁ is the same as the position of the width direction both ends of the 1st phase difference layer 12c ₁ , or the width of the 2nd phase difference layer 22c ₁ . You may remove the 2nd end part 44c so that it may become the same as the position of the both ends of a direction. Thereby, it can suppress that the edge part of an optical laminated body is broken, and it can suppress that the product and conveyance path under manufacture are contaminated.

(Modification 3 of the third embodiment)

In the manufacturing method of this embodiment, only one surface may be surface activated. Since the adhesive layer 13c of the 1st laminated part 10c with an adhesive layer and the 2nd phase difference layer 22c of the 2nd laminated part 20c become easy to adhere together favorably, the surface activation process is the 1st laminated part with an adhesive layer. It is preferable to perform on both the surface of the adhesive layer 13c side of (10c), and the surface of the 2nd phase difference layer 22c side of the 2nd laminated part 20c.

(Modification 4 of Third Embodiment)

In the manufacturing method of this embodiment, only the position of one edge part of the width direction of an adhesive layer may be inner side of the width direction rather than the position of the edge part of a 1st phase difference layer.

In this case, what is necessary is just to remove the 2nd end part of the said one end side of the contact bonding layer in a 1st laminated part with an adhesive layer in retardation layer laminated body.

(Modification 5 of the third embodiment)

In the production method of the present embodiment, the first separation layer may be a first substrate layer (11c ₁₎ and the second release layer to the second substrate layer (21c _1). In this case, the optical film is laminated on the first retardation layer 12c ₁ exposed by peeling off the first base layer 11c ₁ through the adhesive layer for optical films, and the second base layer 21c ₁ is peeled off and exposed. An adhesive layer for an optical laminate may be formed on the second retardation layer 22c ₁ . Alternatively, the adhesive layer for the optical laminate is first laminated on the first retardation layer 12c ₁ exposed by peeling off the first base layer 11c ₁ , and then the second base layer 21c is peeled off to expose the exposed agent. You may laminate | stack an optical film on the 2 retardation layer 22c ₁ through the adhesive layer for optical films.

Fourth Embodiment

(Method for producing retardation film)

6 (a) to 6 (e) are schematic sectional views schematically showing an example of a method of manufacturing the phase difference film 50d of the present embodiment. In the figure, W represents the width direction. The manufacturing method of the retardation film 50d (liquid crystal film) of this embodiment is, for example.

A process of preparing a first laminated portion 10d with an adhesive layer comprising the first base layer 11d, the first retardation layer 12d (the first liquid crystal layer), and the adhesive layer 13d in this order (Fig. 6 ( a)),

Preparing a second laminated portion 20d including a second substrate layer 21d and a second retardation layer 22d (second liquid crystal layer) (FIG. 6B);

Surface-activating the surface of the adhesive layer 13d side of the first laminated part 10d with the adhesive layer and the surface of the second phase difference layer 22d side of the second laminated part 20d;

Bonding layer 13d of the 1st laminated part 10d with an adhesive layer and 22d of 2nd phase difference layers of the 2nd laminated part 20d were bonded together, and the 1st phase difference layer laminated body 40d (1st liquid crystal layer laminated body) To obtain (Fig. 6 (c)),

Process of peeling 2nd base material layer 21d (1st peeling layer) of the 1st phase difference layer laminated body 40d, and obtaining 2nd phase difference layer laminated body 30d (2nd liquid crystal layer laminated body) (FIG. 6 (d)),

It has a process of removing the width direction both ends (third end 34d) of the 2nd phase difference layer laminated body 30d.

As for the 1st laminated part 10d with an adhesive layer shown to Fig.6 (a), in the width direction cross section, the position of the width direction both ends of the adhesive layer 13d is the position of the width direction both ends of the 1st phase difference layer 12d. It is inward in width direction than

As for the 1st phase difference layer laminated body 40d shown to FIG. 6 (c), in the width direction cross section, the position of the width direction both ends of the contact bonding layer 13d is the position of the width direction both ends of the 2nd phase difference layer 22d. It is inward in width direction than

Figure 6 (d) the third end portion (34d) the process of removing the third end portion (34d) first after the removal of second retardation layer laminate (30d ₂₎ (the second liquid crystal layer is laminated after the third end to remove material as shown in ), The positions of both ends of the width direction of the adhesive layer 13d ₂ are the same as the positions of both ends of the width direction of the first retardation layer 12d ₂ and the width of the second retardation layer 22d ₂ . The third end 34d is removed to be the same as the position at both ends of the direction (Fig. 6 (e)).

Hereinafter, it demonstrates concretely based on drawing. In the manufacturing method shown in FIG. 6, the 1st base material with an adhesive layer which contains the 1st base material layer 11d, the 1st phase difference layer 12d, and the contact bonding layer 13d in this order as shown to FIG. 6 (a) first is shown. As shown in FIG. 6 (b), the second laminated portion 20d including the second laminated layer 10d and the second retardation layer 22d is prepared. The first layered portion 10d and the second layered portion 20d with the adhesive layer are long film-like articles, and the process described below is carried out while continuously conveying the first layered portion 10d with the adhesive layer 20d and the second layered portion 20d. Is done. The width direction W is a direction orthogonal to the longitudinal direction of a film-shaped object.

About the 1st base material layer 11d, the 1st phase difference layer 12d, and the contact bonding layer 13d which the 1st laminated part 10d with an adhesive layer has, the 1st laminated part with an adhesive layer shown to Fig.1 (a) ( Since it is the same as that of the 1st base material layer 11a, the 1st phase difference layer 12a, and the contact bonding layer 13a which 10a has, the description is abbreviate | omitted.

As for the second substrate layer 21d and the second retardation layer 22d included in the second laminated portion 20d, the second substrate layer included in the second laminated portion 20a shown in FIG. 21a) and the second retardation layer 22a, the description thereof is omitted.

Subsequently, after surface-activating the surface of the adhesive layer 13d side of the 1st laminated part 10d with an adhesive layer, and the surface of the 2nd phase difference layer 22d side of the 2nd laminated part 20d, the 1st laminated body with an adhesive layer was laminated. The adhesive layer 13d of the portion 10d and the second retardation layer 22d of the second laminated portion 20d are bonded to each other to obtain a first phase difference layer stack 40d shown in FIG. 6C. In the width direction cross section of the 1st phase difference layer laminated body 40d, as shown in FIG.6 (c), the position of the width direction both ends of the contact bonding layer 13c is the width direction of the 2nd phase difference layer 22c. It is inward from the position of an edge part.

Surface activation treatment performed on the surface on the adhesive layer 13d side of the first laminated part 10d with the adhesive layer and the surface on the second phase difference layer 22d side of the second laminated part 20d is described in the above embodiments. The size of the water contact angle of each surface after the surface activation treatment is also the same as that described in the above embodiment, and thus the description thereof is omitted.

Subsequently, the second base layer 21d (first peeling layer) is peeled from the first phase difference layer stack 40d shown in FIG. 6C to obtain a second phase difference layer stack 30d (FIG. 6 (d)). When the 2nd base material layer 21d is peeled from the 1st phase difference layer laminated body 40d, as shown in FIG.6 (d), the 2nd phase difference layer 22d will be removed by the 2nd base material layer 21d which peeled. Some fulfill it. In the first retardation layer stack 40d shown in FIG. 6C, the widthwise end faces of the second retardation layer 22d are positioned at both ends in the width direction of the adhesive layer 13d in the widthwise cross section. This is because the second retardation layer 22d has a non-fixed region (a portion indicated by an oblique line rising to the right in FIG. 6C) which is outside the position in the width direction and is not fixed to the adhesive layer 13d. . Therefore, when the 2nd base material layer 21d is peeled off from the 1st phase difference layer laminated body 40d, the 2nd phase difference layer 22d shown in FIG.6 (c) will be the area | region fixed to the adhesive layer 13d (FIG. of the second retardation layer (22d ₁₎₎ and a second substrate layer (non-fixed region (which proceeds to 21d) Figure 6 (c) and 6 (d) shown in 6 (d), by oblique lines rising rightward 6 (d), in the widthwise cross section, the positions of both ends of the width direction of the second retardation layer 22d ₁ and the positions of both ends of the adhesive layer 13d in the width direction are different from each other. The same 2nd phase difference layer laminated body 30d can be obtained.

Subsequently, the second retardation layer laminate 30d shown in FIG. 6D is cut at both ends in the width direction by a dotted line Xd, and the third end portion 34d in the width direction outside the dotted line Xd. Remove it. Accordingly, as shown in FIG. 6E, the first base layer 11d ₂ , the first retardation layer 12d ₂ , the adhesive layer 13d ₂ , and the second retardation layer 22d ₂ are in this order. having the (in some cases referred to as "retardation layer laminate (30d _2).") 3 end portion (34d), the second retardation layer laminate after the removal of material (30d ₂₎ a is obtained, the phase difference film (50d) It can manufacture.

The position of the dotted line Xd in FIG. 6 (d) is at both ends in the width direction of the adhesive layer 13d _{2 in the} cross section in the width direction of the second retardation layer laminate 30d ₂ after the removal of the third end portion 34d. The position of is determined to be the same as the position of both ends of the width direction of the first retardation layer 12d ₂ , and to be the same as the position of both ends of the width direction of the second retardation layer 22d ₂ . In the second retardation layer laminate 30d shown in FIG. 6D, the dotted line Xd is normally positioned at the third end 34d of the first base layer 11d and the first retardation layer 12d. And an end of the second retardation layer 22d, and defined to include an end of the first base layer 11d, the first retardation layer 12d, the adhesive layer 13d, and the second retardation layer 22d. It is preferable. The layers included in each of the third end portions 34d removed from both ends in the width direction of the second retardation layer laminate 30d may be the same as or different from each other.

In the second retardation layer laminate 30d ₂ obtained by removing the third end 34d, as shown in FIG. 6E, in the cross section of the width direction, both ends of the width direction of the adhesive layer 13d _{2 are} provided. there position, a is the same as the first base material layer (11d _2), located at both ends of the width direction of the first retardation layer (12d ₂₎ and a second retardation layer (22d _2).

The position of the dotted line Xd which defines the area | region of the 3rd end part 34d is an area | region normally 0.5 cm or more in width direction inside from the edge part located in the outermost width direction of the 2nd phase difference layer laminated body 30d, and 1.0 It may be an area of cm or more, an area of 1.5 cm or more, and is usually 20 cm or less, preferably 15 cm or less, and more preferably 10 cm or less. The distance from the edge part located in the outermost width direction of the 2nd phase difference layer laminated body 30d to the position of the dotted line Xd may be the same at the both ends of the width direction of the 2nd phase difference layer laminated body 30d, and mutually differs You may.

As for the 1st phase difference layer laminated body 40d shown to FIG. 6 (c), in the width direction cross section, the position of the width direction both ends of the contact bonding layer 13d is the width direction both ends of the 1st phase difference layer 12d. It is located inside the position and the position of the width direction edge part of the 2nd phase difference layer 22d. Therefore, similarly to the retardation layer laminate 40p shown in FIG. 7A described above, when the first retardation layer 12d and the second retardation layer 22d directly contact each other, the first retardation layer 12d is used. There is a tendency that a part of the transition to the second retardation layer 22d or a part of the second retardation layer 22d transitions to the first retardation layer 12d tends to occur.

So, in this embodiment, in the 2nd phase difference layer laminated body 30d (FIG. 6 (d)) obtained by peeling the 2nd base material layer 21d from the 1st phase difference layer laminated body 40d, the width direction is carried out. Both ends (third end 34d) are removed. In the second retardation layer laminate 30d ₂ after the removal of the third end portion 34d, the widthwise end surfaces of the adhesive layer 13d _{2 have} the widths of the first retardation layer 12d ₂ in the widthwise cross section. the same as the position of the direction and the both ends may also be the same as the position of both ends in the width direction of the second retardation layer (22d _2). As a result, a part of the first retardation layer 12d moves to the second retardation layer 22d or a part of the second retardation layer 22d is disposed at both ends of the first retardation layer stack 40d in the width direction. Even if a phenomenon of shifting to the first retardation layer 12d occurs, the second retardation layer stack 30d ₂ can be obtained by removing the portion where such a phenomenon occurs as the third end portion 34d. When manufacturing an optical laminated body using the retardation film 50d, the edge part of an optical laminated body can be suppressed from breaking, and also the contamination of the product and conveyance path in manufacture can be suppressed.

(Method for Producing Optical Laminate)

The manufacturing method of the optical laminated body of this embodiment is

Preparing a retardation film 50d;

Preparing an optical film,

The optical film is a layer exposed by peeling the second base material layer 21d (first peeling layer) through the adhesive layer for optical film, and laminated on the second retardation layer 22d ₂ after the removal of the third end 34d. Has a process.

The method for producing an optical layered product of the present embodiment, also, the first base layer (11d ₂₎ may optionally a step of separation (second separation layer) exposed by peeling the first base material layer (11d ₂₎ the laminate may be a laminated optical cheyong adhesive layer on the first phase difference layer (12d _2).

Since the manufacturing method of the optical laminated body of this embodiment is the same as that of the manufacturing method demonstrated based on FIG.2 (a)-FIG.2 (c) except using the retardation film 50d, detailed description is abbreviate | omitted.

In the retardation film 50d shown in FIG. 6E, the first retardation layer 12d and the second retardation layer 22d are in direct contact with each other in the first retardation layer stack 40d. The part which might generate | occur | produce p) and the transition part derived from a missing part is removed as 3rd edge part 34d. Therefore, as shown in the optical laminated body 70p demonstrated based on FIG.7 (a)-FIG.7 (d), it is suppressed that an edge part is broken, it suppresses the contamination of the product and a conveyance path in manufacture, and is suitable The laminate can be produced.

The manufacturing method of the retardation film of this embodiment and the manufacturing method of an optical laminated body may be changed like the modification shown below. Moreover, you may arbitrarily combine the above-mentioned embodiment and the modification shown below.

(Modification 1 of the fourth embodiment)

In the manufacturing method of this embodiment, one third end 34d in the width direction of the second retardation layer laminate 30d may be removed. In this case, in the side from which the 3rd end part 34d was removed, it can suppress that the edge part of an optical laminated body is broken, and it can suppress that the product and conveyance path under manufacture are contaminated.

(Modification 2 of the fourth embodiment)

In the manufacturing method of this embodiment, the position of the width direction both ends of the contact bonding layer 13d ₂ becomes the same as the position of the width direction both ends of the 1st phase difference layer 12d ₂ , or the width of the 2nd phase difference layer 22d ₂ . The third end portion 34d may be removed to be the same as the position at both ends in the direction. Thereby, it can suppress that the edge part of an optical laminated body is broken, and it can suppress that the product and conveyance path under manufacture are contaminated.

(Modification 3 of the fourth embodiment)

In the manufacturing method of this embodiment, only one surface may be surface activated. Since the adhesive layer 13d of the first laminated portion 10d with the adhesive layer and the second retardation layer 22d of the second laminated portion 20d are easily bonded together, the surface activation treatment is performed by the first laminated portion with the adhesive layer. It is preferable to perform on both the surface of the adhesive layer 13d side of (10d), and the surface of the 2nd phase difference layer 22d side of the 2nd laminated part 20d.

(Modification 4 of 4th Embodiment)

In the manufacturing method of this embodiment, a 1st peeling layer may be a 1st base material layer, and a 2nd peeling layer may be a 2nd base material layer. Also in this case, in the width direction cross section of the 2nd phase difference layer laminated body after the width direction both ends (3rd end part) of the 2nd phase difference layer laminated body obtained by peeling a 1st base material layer, and removing a 3rd edge part, an adhesive bond layer The position of both ends of the width direction of the is made the same as the position of the both ends of the width direction of a 1st phase difference layer, and is the same as the position of the both ends of the width direction of a 2nd phase difference layer. And what is necessary is just to laminate | stack an optical film on the 1st phase difference layer of the 2nd phase difference layer laminated body after 2nd edge part removal through the contact bonding layer for optical films.

Or an adhesive layer for optical laminated bodies is laminated | stacked on the 1st phase difference layer which peeled and exposed the 1st base material layer 11d, and after that, the 2nd base material layer 21d was peeled and optically exposed on the 2nd phase difference layer exposed. You may laminate | stack an optical film through the adhesive layer for films.

As mentioned above, although embodiment of this invention and its modified example were described, this invention is not limited to these embodiment and its modified example, For example, it implements combining each structure and each process of each above-mentioned embodiment and its modification. You may. Hereinafter, each matter which is common in all embodiment and its modification is demonstrated in detail.

(1st base material layer and 2nd base material layer)

The 1st base material layer and the 2nd base material layer have a function as a support layer which supports the 1st orientation layer and 2nd orientation layer mentioned later formed on these base material layers, and a 1st liquid crystal and a 2nd liquid crystal layer. It is preferable that a 1st base material layer and a 2nd base material layer are films formed from the resin material.

As the resin material, for example, a resin material excellent in transparency, mechanical strength, thermal stability, stretchability and the like is used. Specifically, Polyolefin resin, such as polyethylene and a polypropylene; Cyclic polyolefin resins such as norbornene-based polymers; Polyester-based resins such as polyethylene terephthalate and polyethylene naphthalate; (Meth) acrylic acid-based resins such as (meth) acrylic acid and poly (meth) acrylate; Cellulose ester resins such as triacetyl cellulose, diacetyl cellulose and cellulose acetate propionate; Vinyl alcohol-based resins such as polyvinyl alcohol and polyvinyl acetate; Polycarbonate resins; Polystyrene resin; Polyarylate resins; Polysulfone resins; Polyether sulfone resin; Polyamide-based resins; Polyimide resin; Polyether ketone resins; Polyphenylene sulfide resin; Polyphenylene oxide resins, mixtures thereof, copolymers and the like. Among these resins, it is preferable to use any one or a mixture of cyclic polyolefin resin, polyester resin, cellulose ester resin, and (meth) acrylic acid resin. Here, the said "(meth) acrylic acid" means "at least 1 sort of acrylic acid and methacrylic acid."

The 1st base material layer and the 2nd base material layer may be single | mono layer which mixed 1 type or 2 or more types of resin, and may have a multilayer structure of two or more layers. When having a multilayer structure, resin which comprises each layer may be mutually same or different.

Arbitrary additives may be added to the resin material which comprises the film formed from the resin material. As an additive, a ultraviolet absorber, antioxidant, a lubricant, a plasticizer, a mold release agent, a coloring agent, a flame retardant, a nucleating agent, an antistatic agent, a pigment, a coloring agent, etc. are mentioned, for example.

Although the thickness of a 1st base material layer and a 2nd base material layer is not specifically limited, Generally, it is preferable that it is 1-500 micrometers from the point of workability, such as strength and handleability, It is more preferable that it is 1-300 micrometers, 5 It is more preferable that it is -200 micrometers.

When the 1st laminated part with an adhesive layer has a 1st orientation layer mentioned later, or when a 2nd laminated part has a 2nd orientation layer mentioned later, adhesiveness of a 1st base material layer and a 1st orientation layer, and a 2nd base material layer and agent In order to improve adhesiveness with 2 alignment layers, it is a corona treatment and a plasma to the surface of the side in which the 1st orientation layer of a 1st base material layer is formed, and the surface of the side in which the 2nd alignment layer of at least 2nd base material layer is formed. Treatment, flame treatment, or the like may be performed, or a primer layer or the like may be formed. Moreover, by adjusting the component of the composition for orientation layer formation used to form a 1st alignment layer and a 2nd alignment layer, and the component of the composition for liquid crystal layer formation used for forming a 1st liquid crystal layer and a 2nd liquid crystal layer, the said You may adjust one adhesiveness.

(First alignment layer and second alignment layer)

The 1st laminated part with an adhesive layer may contain the 1st orientation layer between a 1st base material layer and a 1st liquid crystal layer. Moreover, the 2nd laminated part may contain the 2nd orientation layer between the 2nd base material layer and the 2nd liquid crystal layer.

The 1st alignment layer and the 2nd alignment layer have the orientation control force which liquid-crystal aligns the liquid crystal compound contained in a 1st liquid crystal layer and a 2nd liquid crystal layer formed on these alignment layers to a desired direction. Examples of the first alignment layer and the second alignment layer include an alignment polymer layer formed of an alignment polymer, a photoalignment polymer layer formed of a photoalignment polymer, and a groove alignment layer having an uneven pattern or a plurality of grooves (grooves) on the layer surface. The first alignment layer and the second alignment layer may be layers of the same kind or different kinds of layers. The thickness of a 1st orientation layer and a 2nd orientation layer is 10-500 nm normally, and it is preferable that it is 10-200 nm.

An orientation polymer layer can apply | coat the composition which melt | dissolved the orientation polymer in the solvent to the base material layer (1st base material layer or 2nd base material layer), remove a solvent, and can be formed by performing a rubbing process as needed. In this case, the orientation regulation force can be arbitrarily adjusted by the surface state of the orientation polymer and rubbing conditions in the orientation polymer layer formed from the orientation polymer.

A photo-alignment polymer layer can be formed by apply | coating the composition containing the polymer or monomer which has a photoreactive group, and a solvent to a base material layer (1st base material layer or 2nd base material layer), and irradiating polarized light. In this case, the orientation regulating force can be arbitrarily adjusted by the polarization irradiation conditions with respect to the photo-alignment polymer in the photo-alignment polymer layer.

The groove alignment layer is an active energy ray curable resin, for example, in a method of forming an uneven pattern by performing exposure, development, or the like through an exposure mask having a patterned slit on the surface of the photosensitive polyimide film, and a plate-shaped disk having a groove on the surface thereof. Active energy ray-curable to a method of forming an uncured layer of the layer, transferring the layer to a substrate layer (first substrate layer or second substrate layer), and curing the substrate layer (first substrate layer or second substrate layer). A non-hardened layer of resin is formed, and this layer can be formed by pressing a roll-shaped disk having irregularities to form an unevenness and curing.

The 1st alignment layer and the 2nd alignment layer may be contained in the 1st peeling layer and the 2nd peeling layer demonstrated above. That is, when a 1st peeling layer contains a 2nd base material layer, the 1st peeling layer may contain the 2nd orientation layer. Similarly, when a 2nd peeling layer contains a 1st base material layer, the 2nd peeling layer may contain the 1st orientation layer. The same applies to the case where the first base layer includes the first base layer, and the second base layer includes the second base layer. In addition, when the 1st peeling layer does not contain the 1st alignment layer or the 2nd alignment layer, after peeling of a 1st peeling layer, a 1st alignment layer or a 2nd alignment layer may be respectively formed on a 1st liquid crystal layer, or What is necessary is just to remain on 2 liquid crystal layers. Similarly, when the second peeling layer does not include the first alignment layer or the second alignment layer, after peeling off the second peeling layer, the first alignment layer or the second alignment layer is on the first liquid crystal layer or the second liquid crystal layer, respectively. What is necessary is just to remain on a liquid crystal layer. In addition, the layer contained in a 1st peeling layer and a 2nd peeling layer can be set by adjusting the relationship of the adhesive force between each layer, for example, said corona treatment performed with respect to a 1st base material layer and a 2nd base material layer. And the plasma treatment, the flame treatment, the primer layer, the components of the composition for forming the alignment layer, the composition for forming the liquid crystal layer, and the like.

When a 1st orientation layer remains on a 1st liquid crystal layer, the adhesive layer for optical laminated bodies can be provided on a 1st orientation layer. In addition, when a 2nd orientation layer remains on a 2nd liquid crystal layer, the adhesive layer for optical films can be provided on a 2nd orientation layer.

(First liquid crystal layer and second liquid crystal layer)

The first liquid crystal layer and the second liquid crystal layer can be formed using a known liquid crystal compound. The kind of liquid crystal compound is not specifically limited, A rod-shaped liquid crystal compound, a disk shaped liquid crystal compound, and a mixture thereof can be used. The liquid crystal compound may be a polymer liquid crystal compound, a polymerizable liquid crystal compound, or a mixture thereof. For example, when using a polymeric liquid crystal compound, the composition containing a polymeric liquid crystal compound is apply | coated on an orientation layer (1st orientation layer or 2nd orientation layer), a coating film is formed, and this liquid film is hardened by hardening this coating film. A 1st liquid crystal layer or a 2nd liquid crystal layer which is a hardened layer can be formed. Or liquid crystal layer (1st liquid crystal layer or 2nd liquid crystal layer) by apply | coating a liquid crystal compound on a base material layer (1st base material layer or 2nd base material layer), forming a coating film, and extending | stretching this coating film with a base material layer. May be formed.

The first liquid crystal layer and the second liquid crystal layer may be the first retardation layer and the second retardation layer, for example. The first retardation layer and the second retardation layer are not particularly limited as long as they give a predetermined retardation to light, and for example, a half wave plate, a quarter wave plate, a positive C plate, and a quarter wave of reverse wavelength dispersion What functions as a board | plate etc. is mentioned.

In the optical laminated body of this embodiment, when an optical film is a polarizing film, the optical laminated body of this embodiment can be used as a composite polarizing plate. When a composite polarizing plate comprises a circular polarizing plate, the layer structure of a composite polarizing plate is a structure laminated | stacked in order of a polarizing layer (linearly polarizing layer), a 1/2 wavelength plate, and a 1/4 wavelength plate, or a polarizing layer (linearly polarized light). Layer), the liquid crystal layer constituting the first liquid crystal layer and the second liquid crystal layer (the first retardation layer and the second retardation layer) so as to have a stacked structure in order of 1/4 wavelength plate of positive wavelength dispersion and positive C plate. It is desirable to select the type.

(Liquid crystal film)

A liquid crystal film contains a 1st liquid crystal layer and a 2nd liquid crystal layer, For example, when a 1st liquid crystal layer and a 2nd liquid crystal layer are a 1st phase difference layer and a 2nd phase difference layer, respectively, it can become a retardation film.

(Optical film)

As an optical film, a polarizing film, a reflective film, a semi-transmissive reflective film, a brightness improving film, an optical compensation film, the film with an anti-glare function, etc. are mentioned. Moreover, you may have a structure similar to said retardation film (liquid crystal film). The optical film may be a single layer structure, or may be a laminated optical film having a multilayer structure of two or more layers.

(Adhesive layer)

An adhesive layer can be formed by an adhesive agent, an adhesive, and a combination thereof, and is usually one layer, but may be two or more layers. When an adhesive layer consists of two or more layers, each layer may be formed from the same material mutually, and may be formed from a different material.

As an adhesive agent, it can form, for example combining 1 or 2 types or more of an aqueous adhesive, an active energy ray hardening-type adhesive, and an adhesive. As an aqueous adhesive agent, polyvinyl alcohol-type resin aqueous solution, an aqueous two-component urethane emulsion adhesive, etc. are mentioned, for example. As an active energy ray hardening-type adhesive agent, it is an adhesive hardened | cured by irradiating active energy rays, such as an ultraviolet-ray, For example, what contains a polymeric compound and a photoinitiator, contains a photoreactive resin, contains a binder resin and a photoreactive crosslinking agent. Etc. can be mentioned. Examples of the polymerizable compound include photopolymerizable monomers such as photocurable epoxy monomers, photocurable acrylic monomers, and photocurable urethane monomers, oligomers derived from these monomers, and the like. As said photoinitiator, what contains the substance which generate | occur | produces active species, such as a neutral radical, an anion radical, and a cationic radical by irradiating active energy rays, such as an ultraviolet-ray, is mentioned.

As an adhesive, the composition which added crosslinking agents, such as an isocyanate compound, an epoxy compound, an aziridine compound, using (meth) acrylic-type resin, styrene resin, silicone resin, etc. as a base polymer is mentioned.

It is preferable that an adhesive layer is formed using an active energy ray hardening-type adhesive agent, and it is especially preferable to form using the adhesive agent containing an ultraviolet curable epoxy-type monomer and a photocationic polymerization initiator.

(Adhesion Layer for Optical Film)

The adhesive layer for optical films can be formed by an adhesive agent, an adhesive, and a combination thereof. Although the adhesive layer for optical films is one layer normally, you may be formed from two or more layers. When the adhesive layer for optical films consists of two or more layers, each layer may be formed from the same material mutually, and may be formed from another material.

As an adhesive agent and an adhesive which comprise the adhesive layer for optical films, the thing similar to the example of the adhesive agent and adhesive used for the said adhesive layer is mentioned. It is preferable to use an adhesive as an adhesive layer for optical films.

(Adhesion Layer for Optical Laminate)

The adhesive layer for optical laminated bodies can be formed by an adhesive agent, an adhesive, and a combination thereof. Although the adhesive layer for optical laminated bodies is one layer normally, you may be formed from two or more layers. When the adhesive layer for optical laminated bodies consists of two or more layers, each layer may be formed from the same material mutually, and may be formed from another material.

As an adhesive agent and an adhesive which comprise the adhesive layer for optical laminated bodies, the thing similar to the example of the adhesive agent and adhesive which are used for the said adhesive layer is mentioned. It is preferable to use an adhesive as an adhesive layer for optical films.

10a-10d, 10p: 1st laminated part with an adhesive layer, 10a ₁ : The 1st laminated part with an adhesive layer after removal of a 1st edge part, 11a-11d, 11a ₁ , 11c ₁ , 11d ₂ , 11p: 1st base material layer, 12a- 12d, 12a ₁ , 12c ₁ , 12b ₁ , 12d ₂ , 12p, 12p ₁ : first retardation layer (first liquid crystal layer), 12'p: transition portion, 13a to 13d, 13a ₁ , 13c ₁ , 13d ₂ , 13p: adhesive layer, 14a: first end, 20a to 20d, 20p: second laminate, 21a to 21d, 21c ₁ , 21p: second substrate layer, 22a to 22d, 22a ₁ , 22c ₁ , 22d ₁ , 22d ₂ , 22p: a second phase difference layer (the second liquid crystal layer), 30d: second retardation layer laminate (the second liquid crystal layer laminated body), 30d _2: a second retardation layer laminate (third end removed after the third end removed 2nd liquid crystal layer laminated body after this), 34d: 3rd edge part, 40a-40c, 40p: retardation layer laminated body (liquid crystal layer laminated body), 40d: 1st retardation layer laminated body (1st liquid crystal layer laminated body), 40c ₁ : Retardation layer laminated body (2nd liquid crystal layer laminated body after 2nd edge part removal) after 2nd edge part removal, 44c: 2nd edge part, 50a-50d, 50p: Retardation film (liquid crystal film), 60a- 60d, 60p: optical film, 60'p: part of optical film, 62a to 62d, 62p: adhesive layer for optical film, 62'p: part of adhesive layer for optical film, 70a to 70d, 70p: optical laminate, W: Width direction.

Claims (25)

Preparing a first laminated portion with an adhesive layer comprising a first substrate layer, a first liquid crystal layer, and an adhesive layer in this order;
Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;
Surface-activating at least one of the surface of the adhesive layer side of the first laminated part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;
Removing at least one of a first end portion including an end portion of the adhesive layer in a cross section in the width direction of the first laminate part with adhesive layer;
And a step of bonding the adhesive layer of the first laminated part with the adhesive layer after the first end removal and the second liquid crystal layer of the second laminated part to obtain a liquid crystal layer laminate.
The said 1st laminated part with a contact bonding layer has the position of the edge part of the said contact bonding layer in the width direction inside at least one edge part of the width direction cross section,
The removing step,
Before or after the surface activation treatment,
In the width direction cross section of the said 1st laminated part with a contact bonding layer after the said 1st edge removal, the said position so that the position of the edge part of the said adhesive layer by the side from which the said 1st edge was removed is the same as the position of the edge part of a said 1st liquid crystal layer The manufacturing method of the liquid crystal film which removes 1 end. The method for producing a liquid crystal film according to claim 1, wherein the removing step is performed before the surface activation treatment. The said laminated layer with a 1st laminated part of Claim 1 or 2 WHEREIN: The position of the width direction both ends of the said contact bonding layer is the width direction inner side of the said 1st liquid crystal layer rather than the position of the width direction both ends of the said 1st liquid crystal layer in the width direction cross section. ego,
The said 1st edge part is a manufacturing method of the liquid crystal film which is the width direction both ends of the said 1st laminated part with a contact bonding layer. Preparing a first laminated portion with an adhesive layer comprising a first substrate layer, a first liquid crystal layer, and an adhesive layer in this order;
Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;
Surface-activating at least one of the surface of the adhesive layer side of the first laminated part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;
It has a process of joining the said adhesive layer of the said 1st laminated part with an adhesive layer and the said 2nd liquid crystal layer of the said 2nd laminated part, and obtaining a liquid crystal layer laminated body,
In the said 1st laminated part with a contact bonding layer, in the width direction cross section, the position of the width direction edge part of the said contact bonding layer is width direction inner rather than the position of the edge part of the said 1st liquid crystal layer in the width direction cross section,
The said liquid crystal layer laminated body is the manufacture of the liquid crystal film whose position of the edge part of the said contact bonding layer is the same as the position of the edge part of a said 2nd liquid crystal layer in the width direction outer side at least in one edge part of the said width direction cross section. Way. The width direction end surface of the said 1st laminated part with a contact bonding layer WHEREIN: The position of the width direction both ends of the said contact bonding layer is the width direction inside rather than the position of the width direction both ends of the said 1st liquid crystal layer,
The said liquid crystal layer laminated body has a width direction cross section WHEREIN: The manufacturing method of the liquid crystal film whose position of the width direction both ends of the said contact bonding layer is the same as the position of the width direction both ends of the said 2nd liquid crystal layer, or more than the width direction outer side. . The said liquid crystal layer laminated body is a position of the said edge part of a said 2nd base material layer in the position of the said edge part of the said 2nd liquid crystal layer in at least one edge part of the said width direction cross section of the said liquid crystal layer laminated body. The manufacturing method of the same liquid crystal film. The width direction end surface of the said liquid crystal layer laminated body of the said liquid crystal layer laminated body is a width direction both ends of the said 2nd base material layer in any one of Claims 4-6. The manufacturing method of the liquid crystal film same as the position of. The process of any one of Claims 1-7 which peels the 1st peeling layer containing one of the said 1st base material layer and the said 2nd base material layer in the said liquid crystal layer laminated body further, The manufacturing method of the liquid crystal film which has. It is a process of preparing the 1st laminated part with an adhesive layer containing a 1st base material layer, a 1st liquid crystal layer, and an adhesive layer in this order, Comprising: The at least one edge part of the width direction cross section of the 1st laminated part with an adhesive layer WHEREIN: Preparing a first laminated portion with an adhesive layer having a position at an end in a width direction inner than a position at an end of the first liquid crystal layer;
Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;
Surface-activating at least one of the surface of the adhesive layer side of the first laminated part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;
It is a process of joining the said contact bonding layer of the said 1st laminated part with a contact bonding layer, and the said 2nd liquid crystal layer of a said 2nd laminated part, and obtaining a liquid crystal layer laminated body, in the said at least one edge part of the width direction cross section of the said liquid crystal layer laminated body, Obtaining the liquid crystal layer laminate such that the position of the end of the adhesive layer is inward in the width direction than the position of the end of the second liquid crystal layer;
It has a process of removing the 2nd edge part including the edge part of the said adhesive layer of the side in which the said one edge part is located in the said liquid crystal layer laminated body,
In the removing step, the position of an end portion of the adhesive layer on the side from which the second end is removed is the position of the end of the first liquid crystal layer and the second liquid crystal in the cross section in the width direction of the liquid crystal layer laminate after the second end is removed. And removing said second end to be equal to the position of at least one end of the layer. The said removal process is a position of the edge part of the said contact bonding layer of the side from which the said 2nd edge part was removed in the width direction cross section of the said liquid crystal layer laminated body after the said 2nd edge part removal, The said 1st liquid crystal A method for producing a liquid crystal film, wherein the second end is removed to be the same as the position of the end of the layer and to be the same as the position of the end of the second liquid crystal layer. The said laminated layer with a 1st laminated part of Claim 9 or 10 WHEREIN: The position of the width direction both ends of the said contact bonding layer in the width direction cross section is the width direction inner side rather than the position of the width direction both ends of the said 1st liquid crystal layer. It is
In the width direction cross section of the said liquid crystal layer laminated body, the position of the both ends of the said contact bonding layer is set in the width direction inside rather than the position of the both ends of a said 2nd liquid crystal layer,
The said 2nd end part is a manufacturing method of the liquid crystal film which is the width direction both ends of the said liquid crystal layer laminated body. The first peeling according to any one of claims 9 to 11, further comprising one of the first substrate layer and the second substrate layer in the liquid crystal layer laminate after the second end is removed. The manufacturing method of the liquid crystal film which has a process of peeling a layer. It is a process of preparing the 1st laminated part with an adhesive layer containing a 1st base material layer, a 1st liquid crystal layer, and an adhesive layer in this order, Comprising: The at least one edge part of the width direction cross section of the 1st laminated part with an adhesive layer WHEREIN: Preparing a first laminated portion with an adhesive layer having a position at an end in a width direction inner than a position at an end of the first liquid crystal layer;
Preparing a second laminated portion including a second substrate layer and a second liquid crystal layer;
Surface-activating at least one of the surface of the adhesive layer side of the first laminated part with the adhesive layer and the surface of the second liquid crystal layer side of the second laminate part;
It is a process of joining the said contact bonding layer of the said 1st laminated part with a contact bonding layer and the said 2nd liquid crystal layer of a said 2nd laminated part, and obtaining a 1st liquid crystal layer laminated body, The said at least one of the said width direction cross section of a said 1st liquid crystal layer laminated body. At an end portion, obtaining a first liquid crystal layer laminate such that a position of an end portion of the adhesive layer is inward in a width direction than a position of an end portion of the second liquid crystal layer;
Peeling a first peeling layer including one of said first substrate layer and said second substrate layer of said first liquid crystal layer laminate to obtain a second liquid crystal layer laminate;
In the said 2nd liquid crystal layer laminated body, it has a process of removing the 3rd edge part including the edge part of the said contact bonding layer of the side where the said at least one edge part is located,
In the removing step, the position of the end of the adhesive layer is the first liquid crystal layer and the side at which the third end is removed in the cross section in the width direction of the second liquid crystal layer laminate after the third end is removed. The manufacturing method of the liquid crystal film which removes the said 3rd edge part so that it may become the same as the position of the at least one edge part of a said 2nd liquid crystal layer. The said removing process is a side from which the said 3rd edge part was removed in the width direction cross section of the said 2nd liquid crystal layer laminated body after the said 3rd edge edge removal, The position of the edge part of the said contact bonding layer, And the third end portion is removed to be the same as the position of the end of the first liquid crystal layer and the same as the position of the end of the second liquid crystal layer. The said 1st laminated part with an adhesive layer of Claim 13 or 14 WHEREIN: The position of the both ends of the said contact bonding layer is the width direction inside rather than the position of the both ends of the said 1st liquid crystal layer in the width direction cross section,
In the cross section of the width direction of the said 1st liquid crystal layer laminated body, the position of the both ends of the said contact bonding layer is set in the width direction inside rather than the position of the both ends of the said 2nd liquid crystal layer,
The said 3rd edge part is a manufacturing method of the liquid crystal film of the width direction both ends of the said 2nd liquid crystal layer laminated body. The process of any one of Claims 1-15 which prepares the said 1st laminated part with an adhesive layer,
Preparing a first laminate including the first substrate layer and the first liquid crystal layer;
The manufacturing method of the liquid crystal film which has a process of laminating | stacking an adhesive layer on the opposite side to the said 1st base material layer of a said 1st liquid crystal layer, and obtaining the said 1st laminated part with an adhesion layer. The surface activation process of any one of Claims 1-16 WHEREIN: The surface of the said adhesive layer side of the said 1st laminated part with an adhesion layer, and the surface of the said 2nd liquid crystal layer side of the said 2nd laminated part are surfaced. The manufacturing method of the liquid crystal film which carries out an activation process. The method for producing a liquid crystal film according to any one of claims 1 to 17, wherein the surface activation treatment is a corona treatment. The manufacturing method of the liquid crystal film as described in any one of Claims 1-18 whose said 1st liquid crystal layer is a retardation layer. The method of manufacturing a liquid crystal film according to any one of claims 1 to 19, wherein the second liquid crystal layer is a retardation layer. The manufacturing method of the liquid crystal film in any one of Claims 1-20 in which the said 1st laminated part with an adhesive layer contains a 1st orientation layer between the said 1st base material layer and the said 1st liquid crystal layer. The method for producing a liquid crystal film according to any one of claims 1 to 21, wherein the second laminate part includes a second alignment layer between the second substrate layer and the second liquid crystal layer. The process of preparing the liquid crystal film manufactured by the manufacturing method of the liquid crystal film of any one of Claims 8 and 12-15,
Preparing an optical film,
The manufacturing method of the optical laminated body which has a process of peeling the said 1st peeling layer and laminating | stacking on the exposed layer through the adhesive layer for optical films. The manufacturing method of the optical laminated body of Claim 23 which has the process of peeling the 2nd peeling layer which contains the layer which is not contained in the said 1st peeling layer among the said 1st base material layer and the said 2nd base material layer. . The manufacturing method of the optical laminated body of Claim 24 which laminates the contact bonding layer for optical laminated bodies on the layer exposed by peeling the said 2nd peeling layer.

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