JP2019207390A - Manufacturing method for circular polarizing plate - Google Patents

Abstract

To provide a suitable manufacturing method for a circular polarizing plate in order to manufacture a circular polarizing plate having a liquid crystal layer.SOLUTION: A manufacturing method for a circular polarizing plate that includes a polarization function layer including at least a linear polarization layer, an adhesive layer for the polarization function layer, a first liquid crystal layer, an adhesive layer, and a second liquid crystal layer in the order stated, comprises the steps of: preparing a liquid crystal containing layer with a first substrate layer attached, having the adhesive layer, the second crystal layer and a second substrate layer in the order stated on the first liquid crystal layer side of the first liquid crystal layer with a substrate layer attached and having the first substrate layer and the first liquid crystal layer; separating the substrate layer from the liquid crystal containing layer with the first substrate layer attached and forming an exposed surface on the substrate layer side of the first liquid crystal layer; obtaining a liquid crystal containing layer with a first composition layer attached, in which an adhesive composition layer for the polarization function layer for forming an adhesive layer for the polarization function layer on the exposed surface is provided; and pasting the adhesive composition layer for the polarization function layer of the liquid crystal containing layer with the first composition layer attached and the polarization function layer together. The first liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the first substrate layer.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for producing a circularly polarizing plate.

  In a display device such as an organic EL display device or a liquid crystal display device, a member including an optically anisotropic film such as a polarizing film or a retardation film is used. In particular, in an organic EL display device, visibility is easily lowered due to reflection of external light by a metal electrode. Therefore, there is a member called a circularly polarizing plate that combines a polarizing film and an optically anisotropic film for the purpose of preventing the reflection of external light. It is used. As an optically anisotropic film used for a circularly polarizing plate, a film in which a liquid crystal compound layer is formed on a base film is known. For example, Patent Document 1 describes that a liquid crystal material is used for a retardation layer of an optical film used for a circularly polarizing plate or the like.

JP 2014-222282 A

  Since the circularly polarizing plate is usually provided on the viewing side of the organic EL display panel, the visibility of the organic EL display device is likely to be lowered when appearance abnormality such as wrinkles, bubbles, and unevenness occurs in the circularly polarizing plate.

  An object of this invention is to provide the manufacturing method of a circularly-polarizing plate suitable in order to form the circularly-polarizing plate which has a liquid-crystal layer.

The present invention provides the following method for producing a circularly polarizing plate.
[1] A method for producing a circularly polarizing plate including a polarizing functional layer including at least a linear polarizing layer, an adhesive layer for polarizing functional layer, a first liquid crystal layer, an adhesive layer, and a second liquid crystal layer in this order,
The adhesive layer, the second liquid crystal layer, and the second base material layer are arranged in this order on the first liquid crystal layer side of the first liquid crystal layer with the base material layer having the first base material layer and the first liquid crystal layer. Preparing a liquid crystal layer-containing layer with a first base material layer,
Peeling the first base material layer from the liquid crystal layer-containing layer with the first base material layer to form an exposed surface on the first base material layer side of the first liquid crystal layer;
Obtaining a liquid crystal layer-containing layer with a first composition layer provided with an adhesive composition layer for polarizing functional layer for forming the adhesive layer for polarizing functional layer on the exposed surface;
Bonding the polarizing functional layer to the polarizing functional layer adhesive composition layer of the liquid crystal layer-containing layer with the first composition layer,
The first liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer,
The first liquid crystal layer and the second liquid crystal layer may have the following [a] or [b]:
[A] The first liquid crystal layer is a half-wave plate, and the second liquid crystal layer is a quarter-wave plate.
[B] One of the first liquid crystal layer and the second liquid crystal layer is a quarter wavelength plate with reverse wavelength dispersion, and the other is a positive C plate.
The manufacturing method of the circularly-polarizing plate which satisfy | fills these relationships.

[2] A method for producing a circularly polarizing plate including a polarizing functional layer including at least a linear polarizing layer, an adhesive layer for polarizing functional layer, a first liquid crystal layer, an adhesive layer, and a second liquid crystal layer in this order,
The polarizing functional layer, the polarizing functional layer adhesive layer, and the first liquid crystal layer with the base material layer having the first liquid crystal layer and the first base material layer in this order from the polarizing functional layer adhesive layer side, A step of preparing a liquid crystal layer-containing layer with a second base material layer in order;
Peeling the first base material layer from the liquid crystal layer-containing layer with the second base material layer to form an exposed surface on the first base material layer side of the first liquid crystal layer;
Obtaining a liquid crystal layer-containing layer with a second composition layer provided with an adhesive composition layer for forming the adhesive layer on the exposed surface;
The second liquid crystal layer side of the second liquid crystal layer with the base material layer having the second base material layer and the second liquid crystal layer is pasted on the adhesive composition layer of the liquid crystal layer-containing layer with the second composition layer. Combining the steps,
The first liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer,
The first liquid crystal layer and the second liquid crystal layer may have the following [a] or [b]:
[A] The first liquid crystal layer is a half-wave plate, and the second liquid crystal layer is a quarter-wave plate.
[B] One of the first liquid crystal layer and the second liquid crystal layer is a quarter wavelength plate with reverse wavelength dispersion, and the other is a positive C plate.
The manufacturing method of the circularly-polarizing plate which satisfy | fills these relationships.

[3] The step of preparing the liquid crystal layer-containing layer with the second base material layer includes:
Preparing a polarizing functional layer with a composition layer provided with an adhesive composition layer for polarizing functional layer for forming the polarizing functional layer adhesive layer on the polarizing functional layer;
A step of bonding the first liquid crystal layer side of the first liquid crystal layer with the base material layer to the adhesive functional layer for the polarizing functional layer of the polarizing functional layer with the composition layer, Of manufacturing a circularly polarizing plate.

[4] The first liquid crystal layer with a base material layer includes a first alignment layer between the first liquid crystal layer and the first base material layer,
The process of forming the said exposed surface is a manufacturing method of the circularly-polarizing plate in any one of [1]-[3] which peels a said 1st orientation layer with a said 1st base material layer.

[5] The first liquid crystal layer with the base material layer includes a first alignment layer between the first liquid crystal layer and the first base material layer,
The circularly polarizing plate according to [1], wherein the liquid crystal layer-containing layer with the first composition layer includes the first alignment layer between the first liquid crystal layer and the polarizing functional layer adhesive composition layer. Manufacturing method.

[6] The first liquid crystal layer with a base material layer includes a first alignment layer between the first liquid crystal layer and the first base material layer,
The circularly polarizing plate according to [2] or [3], wherein the liquid crystal layer-containing layer with the second composition layer has the first alignment layer between the first liquid crystal layer and the adhesive composition layer. Manufacturing method.

  [7] The method for producing a circularly polarizing plate according to any one of [1] to [6], wherein the first liquid crystal layer includes a leveling agent.

  [8] The method for producing a circularly polarizing plate according to any one of [1] to [7], wherein the adhesive layer is an adhesive hardened layer or a pressure-sensitive adhesive layer.

[9] The adhesive layer is an adhesive cured layer,
The manufacturing method of the circularly-polarizing plate in any one of [1]-[8] in which the adhesive composition layer for forming the said adhesive layer contains an active energy ray hardening-type adhesive agent.

  [10] The method for producing a circularly polarizing plate according to any one of [1] to [9], wherein the first liquid crystal layer is a half-wave plate and the second liquid crystal layer is a quarter-wave plate. .

  [11] The circularly polarizing plate according to any one of [1] to [9], wherein the first liquid crystal layer is a ¼ wavelength plate having reverse wavelength dispersion, and the second liquid crystal layer is a positive C plate. Manufacturing method.

  [12] The method for producing a circularly polarizing plate according to any one of [1] to [11], wherein the polarizing functional layer adhesive layer is an adhesive cured layer or an adhesive layer.

  [13] The circularly polarizing plate according to any one of [1] to [12], wherein the second liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the second base material layer. Production method.

  [14] The method for producing a circularly polarizing plate according to any one of [1] to [13], including a step of peeling off the second base material layer after the step of pasting.

  [15] The method for producing a circularly polarizing plate according to any one of [1] to [14], wherein the polarizing functional layer is a polarizing plate including a protective layer on at least one surface of the linearly polarizing layer.

  ADVANTAGE OF THE INVENTION According to this invention, in order to manufacture a circularly-polarizing plate, the suitable manufacturing method can be provided.

(A)-(e) is a schematic sectional drawing which shows typically an example of the manufacturing process of the circularly-polarizing plate of this invention. (A)-(c) is a schematic sectional drawing which shows typically the continuation of the manufacturing process of the circularly-polarizing plate shown in FIG. (A)-(c) is a schematic sectional drawing which shows typically the continuation of the manufacturing process of the circularly-polarizing plate shown in FIG. (A)-(d) is a schematic sectional drawing which shows typically the other example of the manufacturing process of the circularly-polarizing plate of this invention. (A)-(c) is a schematic sectional drawing which shows typically the continuation of the manufacturing process of the circularly-polarizing plate shown in FIG.

The circularly polarizing plate manufactured by the method for manufacturing a circularly polarizing plate according to the present invention includes a polarizing functional layer including at least a linearly polarizing layer, an adhesive layer for a polarizing functional layer, a first liquid crystal layer, an adhesive layer, and a second liquid crystal layer. It is included in order. In the circularly polarizing plate, the first liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer. In addition, the first liquid crystal layer and the second liquid crystal layer in the circularly polarizing plate have the following [a] or [b]:
[A] The first liquid crystal layer is a half-wave plate, and the second liquid crystal layer is a quarter-wave plate.
[B] One of the first liquid crystal layer and the second liquid crystal layer is a quarter wavelength plate with reverse wavelength dispersion, and the other is a positive C plate.
Satisfy the relationship. In the above [b], it is preferable that the first liquid crystal layer is a quarter wavelength plate having a reverse wavelength dispersion, and the second liquid crystal layer is a positive C plate.

  Since the above-mentioned circularly polarizing plate can be made extremely thin, it is useful for application to a flexible organic EL display device that can be bent or wound, for example, a next-generation organic EL display device. . Hereinafter, the linearly polarizing layer may be simply referred to as a “polarizing layer”, and a linearly polarizing plate in which a protective layer is formed on at least one surface of the linearly polarizing layer may be simply referred to as a “polarizing plate”.

  Hereinafter, a preferred embodiment of a method for producing a circularly polarizing plate of the present invention will be described with reference to the drawings. In addition, you may combine each embodiment shown below and its modification arbitrarily. Moreover, in each embodiment and its modification, about the same member as the member demonstrated in the previous embodiment or its modification, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

[Embodiment 1]
1 to 3 are schematic cross-sectional views schematically showing an example (Embodiment 1) of the manufacturing process of the circularly polarizing plate of the present invention. In the figure, W represents the width direction. As shown in FIG. 3B, the circularly polarizing plate 52 obtained by the production method of the present invention has a polarizing plate 60 (polarizing functional layer) in which a protective layer is formed on at least one surface of the polarizing layer, and for the polarizing plate. The adhesive layer 36 (the polarizing functional layer adhesive layer), the first liquid crystal layer 12, the adhesive layer 30, and the second liquid crystal layer 22 are included in this order. As shown in FIGS. 3A and 3C, the circularly polarizing plate obtained by the production method of the present invention has the second base material layer 21 and the second liquid crystal layer 22 on the side opposite to the adhesive layer 30. The adhesive composition layer 35 for optical elements may be included. As will be described later, the first liquid crystal layer 12 preferably contains a leveling agent.

  In the manufacturing method of the circularly polarizing plate 52 shown in FIG. 3B, first, the polarizing plate adhesive composition layer 36a (for the polarizing functional layer) for forming the polarizing plate adhesive layer 36 on one surface of the polarizing plate 60. A step of preparing a polarizing plate 61 with a composition layer (a polarizing functional layer with a composition layer) provided with an adhesive composition layer) (FIG. 1A), the first liquid crystal layer 12 on the first base material layer 11. A step of preparing the first liquid crystal layer 10 with a base material layer having a laminated structure (FIG. 1B) and a base material layer having a structure in which the second liquid crystal layer 22 is laminated on the second base material layer 21 A step of preparing the second liquid crystal layer 20 (FIG. 1C) is performed.

  The step of preparing the polarizing plate 61 with the composition layer includes the step of applying an adhesive to one surface of the polarizing plate 60 when the polarizing plate adhesive layer 36 of the circularly polarizing plate 52 is an adhesive cured layer. You may have, and may have the process of drying the apply | coated adhesive agent as needed. The step of preparing the polarizing plate 61 with the composition layer is a step of applying a pressure-sensitive adhesive to one surface of the polarizing plate 60 when the polarizing plate adhesive layer 36 of the circularly polarizing plate 52 is a pressure-sensitive adhesive layer. Alternatively, it may have a step of drying the applied adhesive as necessary, or an adhesive layer is formed on the release treatment surface of the release film, and the adhesive layer of the release film is used as a polarizing plate. The process of transferring to 60 may be included.

  The step of preparing the first liquid crystal layer 10 with the base material layer includes a first base material layer 11 and a first liquid crystal layer 12 obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer 11. The 1st liquid crystal layer 10 with a base material layer should just be prepared, and may have the process of superposing | polymerizing a polymerizable liquid crystal compound on the 1st base material layer 11, and forming the 1st liquid crystal layer 12. FIG. When the polymerizable liquid crystal compound is polymerized on the first base material layer 11, the composition for forming a liquid crystal layer containing the polymerizable liquid crystal compound is applied onto the first base material layer 11 and dried. The first liquid crystal layer 12 may be formed by polymerizing a liquid crystal compound. The composition for forming a liquid crystal layer may contain a solvent, a polymerization initiator, a reactive additive, a leveling agent, a polymerization inhibitor and the like in addition to the polymerizable liquid crystal compound. In particular, in the present invention, when the composition for forming a liquid crystal layer contains a leveling agent (when the first liquid crystal layer contains a leveling agent), there is a more remarkable effect. Similarly, the step of preparing the second liquid crystal layer 20 with the base material layer may include a step of polymerizing a polymerizable liquid crystal compound on the second base material layer 21 to form the second liquid crystal layer 22. Alternatively, the second liquid crystal layer 22 may be formed by polymerizing the polymerizable liquid crystal compound after applying the liquid crystal layer forming composition containing the polymerizable liquid crystal compound on the second base material layer 21 and drying it.

  Next, the adhesive composition layer 36a for the polarizing plate 61 of the polarizing plate 61 with the composition layer and the first liquid crystal layer 12 of the first liquid crystal layer 10 with the base material layer are bonded together (FIG. 1 (d)). Further, a polarizing plate adhesive layer 36 is formed from the polarizing plate adhesive composition layer 36a to obtain a liquid crystal layer-containing layer 41 with a base material layer (second liquid crystal layer-containing layer with a base material layer) (FIG. 1 (e)). ). The method for forming the polarizing plate adhesive layer 36 from the polarizing plate adhesive composition layer 36a may be selected according to the components contained in the polarizing plate adhesive composition layer 36a. For example, the polarizing plate adhesive composition The treatment for curing the layer 36a may be performed, and in the case of a component that does not require the curing treatment, the polarizing plate adhesive composition layer 36a may be used as the polarizing plate adhesive layer 36 without performing any special treatment. As shown in FIG. 1E, the liquid crystal layer-containing layer 41 with a base material layer includes a polarizing plate 60, a polarizing plate adhesive layer 36, the first liquid crystal layer 12, and the first base material layer 11 in this order.

  Then, with reference to FIG.2 and FIG.3, the method to obtain the circularly-polarizing plate 52 from the liquid crystal layer containing layer 41 with a base material layer prepared as mentioned above is demonstrated. First, the liquid crystal layer-containing layer 42 including the polarizing plate 60, the polarizing plate adhesive layer 36, and the first liquid crystal layer 12 in this order by peeling the first base material layer 11 from the liquid crystal layer-containing layer 41 with the base material layer. (FIG. 2 (a)). Thereafter, a step of obtaining a liquid crystal layer-containing layer 43 with a composition layer (a liquid crystal layer-containing layer with a second composition layer) provided with an adhesive composition layer 30a for forming the adhesive layer 30 on the liquid crystal layer-containing layer 42. (FIG. 2B). In the step of obtaining the liquid crystal layer-containing layer 43 with the composition layer, as shown in FIG. 2B, the first base material layer 11 is peeled from the liquid crystal layer-containing layer 41 with the base material layer of the liquid crystal layer-containing layer 42. An adhesive composition layer 30a is formed on the exposed surface of the exposed first liquid crystal layer 12 on the first base material layer 11 side. The step of forming the adhesive composition layer 30a on the liquid crystal layer-containing layer 42 is performed by adhering to the liquid crystal layer-containing layer 42 when the adhesive layer 30 of the circularly polarizing plate 52 (FIG. 3B) is an adhesive cured layer. It may have a step of applying an agent, and may have a step of drying the applied adhesive as necessary. In addition, the step of forming the adhesive composition layer 30a on the liquid crystal layer-containing layer 42 is performed on the liquid crystal layer-containing layer 42 when the adhesive layer 30 of the circularly polarizing plate 52 (FIG. 3B) is an adhesive layer. It may have a step of applying a pressure-sensitive adhesive and a step of drying the pressure-sensitive adhesive applied as necessary, or a pressure-sensitive adhesive layer is formed on the release treatment surface of the release film, A step of transferring the pressure-sensitive adhesive layer to the liquid crystal layer-containing layer 42 may be included. As shown in FIG. 2B, the liquid crystal layer-containing layer 43 with a composition layer includes a polarizing plate 60, a polarizing plate adhesive layer 36, the first liquid crystal layer 12, and an adhesive composition layer 30a in this order.

  Next, the process of bonding the adhesive composition layer 30a of the liquid crystal layer-containing layer 43 with the composition layer and the second liquid crystal layer 22 of the second liquid crystal layer 20 with the base material layer shown in FIG. (FIG. 2C), an adhesive layer 30 is formed from the adhesive composition layer 30a to obtain a circularly polarizing plate 51 with a base material layer (circularly polarizing plate) (FIG. 3A). The method for forming the adhesive layer 30 from the adhesive composition layer 30a may be selected according to the components contained in the adhesive composition layer 30a. For example, the adhesive composition layer 30a may be cured. In the case of a component that does not require a curing treatment, the adhesive composition layer 30a may be used as the adhesive layer 30 without performing any special treatment. As shown in FIG. 3A, the circularly polarizing plate 51 with a base material layer includes a polarizing plate 60, a polarizing plate adhesive layer 36, a first liquid crystal layer 12, an adhesive layer 30, a second liquid crystal layer 22, and a second liquid crystal layer. Since the base material layer 21 is included in this order, it is a circularly polarizing plate obtained by the present invention, and may also be a circularly polarizing plate with a base material layer having the second base material layer 21.

  The manufacturing method of the circularly-polarizing plate 52 is the process of peeling the 2nd base material layer 21 after the process of bonding the liquid crystal layer containing layer 43 with a composition layer, and the 2nd liquid crystal layer 20 with a base material layer further ( 3 (b)), specifically, a step of peeling the second base material layer 21 from the circularly polarizing plate 51 with the base material layer (FIG. 3 (b)) may be included. Moreover, the manufacturing method of the circularly-polarizing plate 52 is further the adhesive composition layer 35 for optical elements on the exposed surface by the side of the 2nd base material layer 21 of the 2nd liquid crystal layer 22 which peeled and exposed the 2nd base material layer 21. To form a circularly polarizing plate 53 with an adhesive composition layer (circularly polarizing plate) (FIG. 3C). As shown in FIG. 3C, the circularly polarizing plate 53 with an adhesive composition layer includes a polarizing plate 60, a polarizing plate adhesive layer 36, a first liquid crystal layer 12, an adhesive layer 30, a second liquid crystal layer 22, and optical. Since the adhesive composition layer 35 for elements is included in this order, it is a circularly polarizing plate obtained by the present invention, and may also be a circularly polarizing plate with an adhesive composition layer having an adhesive composition layer for optical elements.

  In the manufacturing method of the circularly polarizing plate 52, as shown in FIGS. 1 (e), 2 (a), and 2 (b), the liquid crystal layer-containing layer 42 with the base material layer 41 is added to the first group. The adhesive composition layer 30a is exposed on the exposed surface on the first base material layer 11 side of the first liquid crystal layer 12 exposed by peeling the material layer 11 (hereinafter, also referred to as “exposed surface of the liquid crystal layer-containing layer 42”). Is forming. The adhesive composition layer 30 a has an affinity for the exposed surface of the liquid crystal layer-containing layer 42 rather than the side of the first liquid crystal layer 12 opposite to the first base material layer 11. Therefore, when the adhesive composition layer 30a is formed on the exposed surface of the liquid crystal layer-containing layer 42, compared to the case where the adhesive composition layer is formed on the opposite side of the first liquid crystal layer 12 from the first base material layer 11. Thus, the adhesive composition layer 30a can be formed on the exposed surface of the liquid crystal layer-containing layer 42 with high adhesion.

  The reason is presumed as follows. Since the first liquid crystal layer 12 is formed by polymerization (reaction) of the polymerizable liquid crystal compound on the first base material layer 11, the exposed surface of the liquid crystal layer-containing layer 42 and the first liquid crystal layer 12 It is considered that the surface characteristics of the first liquid crystal layer 12 are different from the side opposite to the first base material layer 11 (the side exposed to the atmosphere during polymerization of the polymerizable liquid crystal compound). Due to the difference in surface characteristics, the affinity for the adhesive composition forming the adhesive composition layer 30a on each surface is different, and the first base material layer of the first liquid crystal layer 12 is exposed on the exposed surface of the liquid crystal layer-containing layer 42. It is estimated that the adhesive composition layer 30a can be formed while suppressing repelling as compared to the side opposite to 11. As a result, in the exposed surface of the liquid crystal layer-containing layer 42, the adhesive composition layer 30 a formed on the liquid crystal layer-containing layer 42 is compared with the side of the first liquid crystal layer 12 opposite to the first base material layer 11. It is considered that the occurrence of unevenness can be suppressed, and the liquid crystal layer-containing layer 42 and the adhesive composition layer 30a can be laminated with high adhesion. Thereby, in the circularly polarizing plate 52, it is possible to suppress the generation of wrinkles and the generation of bubbles between the liquid crystal layer-containing layer 42 and the adhesive layer 30, and the liquid crystal layer-containing layer 42 and the second It is considered that the liquid crystal layer 22 can be stacked with high adhesion. In addition, by suppressing generation of unevenness, wrinkles, and bubbles in the circularly polarizing plate 52, it is possible to obtain a circularly polarizing plate with a good appearance, so that the visibility decreases when applied to an organic EL display device. Can be suppressed.

  In particular, when the first liquid crystal layer 12 is formed by applying a liquid crystal layer forming composition containing a leveling agent together with a polymerizable liquid crystal compound on the first base material layer 11, the first group of the first liquid crystal layer 12. It is presumed that the difference between the surface characteristics on the material layer 11 side and the surface characteristics on the opposite side tends to be large. The leveling agent has a function of adjusting the flatness of the first liquid crystal layer obtained from the coating layer formed by coating the composition for forming a liquid crystal layer and the coating layer, and for forming a liquid crystal layer containing the leveling agent. In the first liquid crystal layer 12 formed by applying the composition, it is considered that the leveling agent tends to gather on the side opposite to the first base material layer 11 (the side exposed to the atmosphere during polymerization of the polymerizable liquid crystal compound). Because it is. On the exposed surface of the liquid crystal layer-containing layer 42 that is the side exposed by peeling the first base material layer 11 from the liquid crystal layer-containing layer 41 with the base material layer, the first liquid crystal layer 12 is opposite to the first base material layer 11. Since the amount of the leveling agent is smaller than that on the side, it is presumed that the affinity for the adhesive composition forming the adhesive composition layer 30a is increased. Thereby, when the first liquid crystal layer includes a leveling agent, unevenness is prevented from occurring in the adhesive composition layer 30a formed on the liquid crystal layer-containing layer 42 on the exposed surface of the liquid crystal layer-containing layer 42. It is easy to stack the liquid crystal layer-containing layer 42 and the adhesive composition layer 30a with higher adhesion, and it is considered that a circularly polarizing plate having a good appearance can be obtained.

  The first liquid crystal layer 10 with a base material layer, the second liquid crystal layer 20 with a base material layer, the polarizing plate 61 with a composition layer, and these are used to produce a circularly polarizing plate in the present invention. It is preferable that all film-like materials, such as a laminated body, are long film-like materials, and it is preferable to perform each process, conveying these continuously. The width direction W is a direction orthogonal to the length direction of the film-like object.

  The manufacturing method of the circularly-polarizing plate of this invention may be changed like the modification shown below. Moreover, you may combine arbitrarily above-described embodiment and the modification shown below.

(Modification 1 of Embodiment 1)
In the above, the 1st liquid crystal layer 10 with the base material layer 10 in which the 1st liquid crystal layer 12 was formed on the 1st base material layer 11 (Drawing 1 (b)), and the 2nd liquid crystal on the 2nd base material layer 21 Although the case where the second liquid crystal layer 20 with the base material layer (FIG. 1C) formed with the layer 22 is used has been described as an example, the present invention is not limited to this. The first liquid crystal layer with a base material layer may have a first alignment layer between the first base material layer and the first liquid crystal layer, and the second liquid crystal layer with a base material layer is a second base material. A second alignment layer may be provided between the layer and the second liquid crystal layer.

  When the 1st liquid crystal layer with a base material layer has a 1st alignment layer, the circularly-polarizing plate obtained by the manufacturing method of the circularly-polarizing plate of this invention may have a 1st alignment layer, and has It does not have to be. When the circularly polarizing plate has the first alignment layer, when the first base material layer is peeled from the liquid crystal layer-containing layer with the base material layer, the adhesion between the respective layers is such that the first alignment layer remains on the first liquid crystal layer. What is necessary is just to adjust force, and when a circularly-polarizing plate does not have a 1st orientation layer, when peeling a 1st base material layer from a liquid-crystal layer containing layer with a base material layer, it is a 1st orientation layer with a 1st base material layer. What is necessary is just to adjust the adhesive force between each layer so that can be peeled. When the circularly polarizing plate has the first alignment layer, the liquid crystal layer-containing layer has the first alignment layer on the side opposite to the polarizing plate adhesive layer 36 of the first liquid crystal layer 12, and the liquid crystal layer with a composition layer is The first alignment layer is provided between the first liquid crystal layer 12 and the adhesive composition layer 30a. Note that the present inventors also have an adhesive composition when the exposed surface of the liquid crystal layer-containing layer formed by peeling the first base material layer from the liquid crystal layer-containing layer with the base material layer is the first alignment layer. It has been confirmed that the affinity for the object is higher than that of the first liquid crystal layer on the side opposite to the first substrate layer. Therefore, even when the exposed surface of the liquid crystal layer-containing layer is the first alignment layer, the liquid crystal layer-containing layer and the adhesive composition layer are highly adhered by forming the adhesive composition layer on the first alignment layer. It is thought that it can be laminated by force.

  When the 2nd liquid crystal layer 20 with a base material layer has a 2nd orientation layer, the circularly-polarizing plate may have the 2nd orientation layer and does not need to have it. When the 2nd liquid crystal layer with a base material layer has a 2nd alignment layer, when peeling a 2nd base material layer from a circularly-polarizing plate with a base material layer, a 2nd alignment layer is on a 2nd liquid crystal layer. What is necessary is just to adjust the adhesive force between each layer so that it may remain or the 2nd orientation layer can be peeled with a 2nd base material layer. When the circularly polarizing plate includes the second alignment layer, the second alignment layer is provided on the side opposite to the adhesive layer of the second liquid crystal layer, and the optical element adhesive composition layer is formed on the second alignment layer. .

  The adhesion between each layer can be adjusted by a surface treatment performed on components contained in each layer and the surface of each layer. For example, adhesion between the alignment layer (first alignment layer or second alignment layer), the substrate layer (first substrate layer or second substrate layer), and the liquid crystal layer (first liquid crystal layer or second liquid crystal layer). The force depends on the type and amount of the polymerization initiator, reactive additive, leveling agent, polymerization inhibitor and other additives contained in the alignment layer and liquid crystal layer, on the surface of the alignment layer side of the substrate layer and on the substrate layer. It can be adjusted by surface treatment such as corona treatment, plasma treatment, flame treatment or the like performed on the surface of the provided alignment layer.

(Modification 2 of Embodiment 1)
Although the case where the polarizing plate 60 and the polarizing plate 61 with a composition layer were used as an example was demonstrated above, the manufacturing method of the circularly-polarizing plate of this invention is not limited to this. Instead of the polarizing plate 60 and the polarizing plate 61 with the composition layer, the transfer base material layer and the transfer base material adhesive composition for forming the transfer base material adhesive layer on one surface of the transfer base material layer A transfer substrate layer with a composition layer provided with a layer may be used. The adhesive composition layer for a transfer substrate can be formed in the same manner as the polarizing plate adhesive layer 36 described above.

  When using the transfer substrate layer with the composition layer, the first liquid crystal layer of the first liquid crystal layer with the substrate layer and the adhesive composition layer for transfer substrate of the transfer substrate layer with the composition layer are bonded together. By forming an adhesive layer for transfer substrate from the adhesive composition layer for transfer substrate, a liquid crystal layer-containing layer with a substrate layer can be obtained. The method for forming the transfer substrate adhesive layer from the transfer substrate adhesive composition layer can be performed in the same manner as the method for forming the polarizer adhesive layer 36 from the polarizer adhesive composition layer 36a. The obtained liquid crystal layer-containing layer with a base material layer includes a transfer base material layer, an adhesive layer for transfer base material layer, a first liquid crystal layer, and a first base material layer in this order.

  Subsequently, the first base material layer is peeled from the liquid crystal layer-containing layer with the base material layer, and an exposed surface is formed on the first base material layer side of the first liquid crystal layer, thereby transferring the transfer base material layer and the transfer base material. A liquid crystal layer-containing layer including the layer adhesive layer and the first liquid crystal layer in this order is obtained. An adhesive composition layer is provided on the first liquid crystal layer side of the obtained liquid crystal layer-containing layer in the same procedure as in the above-described embodiment, and then the second liquid crystal layer with the adhesive composition layer and the second liquid crystal layer with the substrate layer is provided. A liquid crystal layer is bonded. Next, the second base material layer is peeled off, and the composition layer of the polarizing plate with the composition layer is bonded to the exposed surface formed on the second base material layer side of the second liquid crystal layer. A board can be obtained. In the circularly polarizing plate of this modification, the adhesive composition layer for a transfer substrate may be used as the adhesive composition layer for an optical element in the above embodiment, and the transfer substrate layer may be used as a separator.

  Thus, when the liquid crystal layer-containing layer with the base material layer includes the transfer base material layer, the transfer base material layer is not peeled in the step of forming the exposed surface on the base material layer side of the first liquid crystal layer. A liquid crystal layer-containing layer can be obtained by peeling off the first base material layer.

In the present modification, the retardation layer forming the first liquid crystal layer and the second liquid crystal layer has the following [a ′] or [b]:
[A ′] The first liquid crystal layer is a quarter-wave plate, and the second liquid crystal layer is a quarter-wave plate.
[B] One of the first liquid crystal layer and the second liquid crystal layer is a quarter wavelength plate with reverse wavelength dispersion, and the other is a positive C plate.
Satisfy the relationship. In the above [b], it is preferable that the first liquid crystal layer is a positive C plate and the second liquid crystal layer is a quarter wavelength plate having reverse wavelength dispersion.

[Embodiment 2]
4-5 is schematic sectional drawing which shows typically an example (Embodiment 2) of the manufacturing process of the circularly-polarizing plate of this invention. In the figure, W represents the width direction. As shown in FIG. 5B, the layer structure of the circularly polarizing plate 57 obtained by the production method of the present invention is a polarizing plate 60 (polarizing functional layer) in which a protective layer is formed on at least one surface of the polarizing layer, The polarizing plate adhesive layer 31 (polarizing functional layer adhesive layer), the first liquid crystal layer 12, the adhesive layer 34 (adhesive layer), and the second liquid crystal layer 22 are included in this order. As shown in FIGS. 5A and 5C, the circularly polarizing plate obtained by the production method of the present invention has the second base material layer 21 and the optical element on the side opposite to the adhesive layer 34 of the second liquid crystal layer 22. The adhesive composition layer 35 may be included.

  In the manufacturing method of the circularly polarizing plate 57 shown in FIG. 5B, with the base material layer having a configuration in which the first liquid crystal layer 12 is laminated on the first base material layer 11 (base material layer) described in the previous embodiment. A step of preparing the first liquid crystal layer 10 (FIG. 1B) and a step of preparing the second liquid crystal layer 20 with the base material layer having the configuration in which the second liquid crystal layer 22 is laminated on the second base material layer 21. (FIG. 1C) is performed. The step of preparing the first liquid crystal layer 10 with the base material layer includes a first base material layer 11 and a first liquid crystal layer 12 obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer 11. The 1st liquid crystal layer 10 with a base material layer should just be prepared, and may have the process of superposing | polymerizing a polymerizable liquid crystal compound on the 1st base material layer 11, and forming the 1st liquid crystal layer 12. FIG. Similarly, the step of preparing the second liquid crystal layer 20 with the base material layer may include a step of polymerizing a polymerizable liquid crystal compound on the second base material layer 21 to form the second liquid crystal layer 22. .

  Next, the first liquid crystal layer 10 with the base material layer and the second liquid crystal layer 20 with the base material layer are laminated so that the first liquid crystal layer 12 and the second liquid crystal layer 22 face each other through the adhesive layer 34. Thus, a liquid crystal layer-containing layer 46 with a base material layer (first liquid crystal layer-containing layer with a base material layer) is obtained (FIG. 4A). As shown in FIG. 4A, the liquid crystal layer-containing layer 46 with a base material layer includes a first base material layer 11, a first liquid crystal layer 12, an adhesive layer 34, a second liquid crystal layer 22, and a second base material layer. 21 in this order.

  Next, a method for obtaining the circularly polarizing plate 57 from the liquid crystal layer-containing layer 46 with the base material layer prepared as described above will be described with reference to FIGS. First, the first liquid crystal layer 12, the adhesive layer 34, the second liquid crystal layer 22, and the second base material layer 21 are disposed in this order by peeling the first base material layer 11 from the liquid crystal layer-containing layer 46 with the base material layer. A liquid crystal layer-containing layer 47 is obtained (FIG. 4B).

  Thereafter, a liquid crystal layer-containing layer 48 with a composition layer, in which a polarizing plate adhesive composition layer 31 a (polarizing functional layer adhesive composition layer) for forming the polarizing plate adhesive layer 31 is provided on the liquid crystal layer-containing layer 47. A step of obtaining (a liquid crystal layer-containing layer with a first composition layer) is performed (FIG. 4C). In the step of obtaining the liquid crystal layer-containing layer 48 with the composition layer, as shown in FIG. 4C, the first base material layer 11 is peeled from the liquid crystal layer-containing layer 46 with the base material layer of the liquid crystal layer-containing layer 47. A polarizing plate adhesive composition layer 31 a is formed on the exposed surface of the exposed first liquid crystal layer 12 on the first base material layer 11 side. The step of forming the polarizing plate adhesive composition layer 31a on the liquid crystal layer-containing layer 47 is performed when the polarizing plate adhesive layer 31 of the circularly polarizing plate 57 (FIG. 5B) is an adhesive cured layer. You may have the process of apply | coating an adhesive agent to the layer containing layer 47, and may have the process of drying the apply | coated adhesive agent as needed. Further, the step of forming the polarizing plate adhesive composition layer 31a on the liquid crystal layer-containing layer 47 is performed when the polarizing plate adhesive layer 31 of the circularly polarizing plate 57 (FIG. 5B) is an adhesive layer. You may have the process of applying an adhesive to liquid crystal layer content layer 47, and the process of drying the applied adhesive if needed, or forming an adhesive layer in the mold release processing side of a release film And you may have the process of transcribe | transferring the adhesive layer of a release film to the liquid crystal layer containing layer 47. FIG. As shown in FIG. 4C, the liquid crystal layer-containing layer 48 with the composition layer includes an adhesive composition layer 31a for the polarizing plate, the first liquid crystal layer 12, the adhesive layer 34, the second liquid crystal layer 22, and the second group. The material layer 21 is included in this order.

  Next, the process of bonding the polarizing plate adhesive composition layer 31a of the liquid crystal layer-containing layer 48 with the composition layer and the polarizing plate 60 is performed (FIG. 4D), and from the polarizing plate adhesive composition layer 31a. A polarizing plate adhesive layer 31 is formed to obtain a circularly polarizing plate 56 with a base material layer (circularly polarizing plate) (FIG. 5A). The method for forming the polarizing plate adhesive layer 31 from the polarizing plate adhesive composition layer 31a may be selected according to the components contained in the polarizing plate adhesive composition layer 31a. For example, the polarizing plate adhesive composition The treatment for curing the layer 31a may be performed, and when the curing treatment is not necessary, the polarizing plate adhesive composition layer 31a may be used as the polarizing plate adhesive layer 31 without performing any special treatment. As shown in FIG. 5A, the circularly polarizing plate 56 with a base material layer includes a polarizing plate 60, a polarizing plate adhesive layer 31, a first liquid crystal layer 12, an adhesive layer 34, a second liquid crystal layer 22, and a second liquid crystal layer. Since the base material layer 21 is included in this order, it is a circularly polarizing plate obtained by the present invention, and may also be a circularly polarizing plate with a base material layer having the second base material layer 21.

  The manufacturing method of the circularly polarizing plate 57 further includes a step of peeling the second base material layer 21 from the circularly polarizing plate 56 with the base material layer (FIG. 5B), and a step of peeling the second base material layer 21. The process of forming the adhesive composition layer 35 for optical elements in the exposed surface side by the side of the 2nd base material layer 21 of the exposed 2nd liquid-crystal layer 22, and obtaining the circularly-polarizing plate 58 (circularly-polarizing plate) with an adhesive composition layer (FIG. 5C) may be included. As shown in FIG. 5C, the circularly polarizing plate 58 with an adhesive composition layer includes a polarizing plate 60, a polarizing plate adhesive layer 31, a first liquid crystal layer 12, an adhesive layer 34, a second liquid crystal layer 22, and optical. Since the adhesive composition layer 35 for elements is included in this order, it is a circularly polarizing plate obtained by the present invention, and may also be a circularly polarizing plate with an adhesive composition layer having an adhesive composition layer for optical elements.

  In the manufacturing method of the circularly polarizing plate 57, as shown in FIGS. 4A to 4C, the first base material layer 11 is peeled and exposed from the liquid crystal layer-containing layer 46 with the base material layer of the liquid crystal layer-containing layer 47. A polarizing plate adhesive composition layer 31a is formed on the exposed surface of the first liquid crystal layer 12 on the first base material layer 11 side (hereinafter, also referred to as “exposed surface of the liquid crystal layer-containing layer 47”). . The adhesive composition layer 31 a for polarizing plate has an affinity for the exposed surface of the liquid crystal layer-containing layer 47 of the liquid crystal layer-containing layer 47 rather than the side of the first liquid crystal layer 12 opposite to the first base material layer 11. Therefore, when the polarizing plate adhesive composition layer 31 a is formed on the exposed surface of the liquid crystal layer-containing layer 47, the polarizing plate adhesive composition layer is formed on the opposite side of the first liquid crystal layer 12 from the first base material layer 11. Compared with the case where 31a is formed, the adhesive composition layer 31a for a polarizing plate can be formed on the liquid crystal layer-containing layer 47 with higher adhesion.

  The reason for this is that, as described in the previous embodiment, the polymerizable liquid crystal compound is polymerized (reacted) on the first base material layer 11 to form the first liquid crystal layer 12. The surface property of the exposed surface is different from the surface property on the opposite side (the side exposed to the atmosphere during polymerization of the polymerizable liquid crystal compound), and the first surface of the first liquid crystal layer 12 is exposed on the exposed surface of the liquid crystal layer-containing layer 47. It is considered that the adhesive composition layer 31a for polarizing plate can be formed while suppressing repelling as compared to the side opposite to the one base material layer 11. Thereby, in the exposed surface of the liquid crystal layer-containing layer 47, the adhesive composition for a polarizing plate formed on the liquid crystal layer-containing layer 47 as compared with the side opposite to the first base material layer 11 of the first liquid crystal layer 12 The occurrence of unevenness in the layer 31a is suppressed, and the liquid crystal layer-containing layer 47 and the polarizing plate adhesive composition layer 31a are laminated with high adhesion, and the circularly polarizing plate 57 is wrinkled or contains a liquid crystal layer. It is presumed that the liquid crystal layer-containing layer 47 and the second liquid crystal layer 22 can be laminated with a high adhesion force by suppressing the generation of bubbles between the layer 47 and the polarizing plate adhesive layer 31. The Further, by suppressing the generation of unevenness, wrinkles and bubbles in the circularly polarizing plate 52, a circularly polarizing plate having a good appearance can be obtained, so that the visibility is lowered when applied to an organic EL display device. Can be suppressed.

  As described in the previous embodiment, when the first liquid crystal layer 12 is formed by applying a liquid crystal layer forming composition containing a leveling agent together with the polymerizable liquid crystal compound on the first base material layer 11, It is presumed that the difference between the surface property of the first liquid crystal layer 12 on the first base material layer 11 side and the surface property on the opposite side tends to be large due to the difference in the amount of the leveling agent present. Therefore, on the exposed surface of the liquid crystal layer-containing layer 47 that is the side exposed by peeling the first base material layer 11 from the liquid crystal layer-containing layer 46 with the base material layer, the first base material layer 11 of the first liquid crystal layer 12 and Since the amount of the leveling agent is small compared to the opposite side, it is easy to suppress the occurrence of unevenness in the polarizing plate adhesive composition layer 31a formed on the liquid crystal layer-containing layer 47, and the liquid crystal layer contains It is considered that the layer 47 and the adhesive composition layer 31a for polarizing plate can be laminated with higher adhesion, and a circularly polarizing plate having a good appearance can be obtained.

  In addition, in order to manufacture a circularly-polarizing plate in this embodiment, the 1st liquid crystal layer 10 with a base material layer, the 2nd liquid crystal layer 20 with a base material layer, the polarizing plate 60, and the laminate obtained using these It is preferable that all film-like materials are long film-like materials, and it is preferable to perform each step while continuously conveying these. The width direction W is a direction orthogonal to the length direction of the film-like object.

  The manufacturing method of the circularly-polarizing plate of this embodiment may be changed like the modification shown below. Moreover, you may combine arbitrarily above-described embodiment and the modification shown below.

(Modification of Embodiment 2)
Similar to the previous embodiment, also in this embodiment, the first liquid crystal layer with the base material layer may have a first alignment layer between the first base material layer and the first liquid crystal layer, The second liquid crystal layer with the base material layer may have a second alignment layer between the second base material layer and the second liquid crystal layer. Description of the case where the first alignment layer and the second alignment layer are provided is the same as described in the modification of the previous embodiment, and thus description thereof is omitted.

  As mentioned above, although embodiment of this invention and its modification were demonstrated, this invention is not limited to these embodiment and its modification, for example, each structure of said each embodiment and its modification, and Each process can also be implemented in combination. Hereinafter, each item common to all the embodiments and the modifications thereof will be described in detail.

(Circularly polarizing plate obtained by the production method of the present invention)
In the circularly polarizing plate 52 shown in FIG. 3B and the circularly polarizing plate 57 shown in FIG. 5B, the polarizing plate 60 is a linear polarizing plate, the first liquid crystal layer 12 is a half-wave plate, The two liquid crystal layer 22 is a quarter wavelength plate. The polarizing plate 60 is a linear polarizing plate, the first liquid crystal layer 12 is a reverse wavelength dispersive quarter-wave plate, and the second liquid crystal layer 22 is a positive C plate, or the first liquid crystal layer 12. Is a positive C plate, and the second liquid crystal layer 22 is a quarter-wave plate of inverse wavelength dispersion.

(Polarization functional layer)
As the polarizing functional layer, a polarizing layer, a polarizing plate in which a protective layer is formed on at least one side of the polarizing layer, and a polarizing plate with a protective film in which a protective film is laminated on at least one side of the polarizing plate can be used. Moreover, it may have one of a reflective film, a transflective reflective film, an optical compensation film, a film with an antiglare function, and a retardation film on the polarizing layer or the polarizing plate, or two or more. It may have a multilayer structure having The polarizing layer included in the polarizing functional layer may be a liquid crystal layer, that is, a polarizing layer (described later) formed using a polymerizable liquid crystal compound. In this specification, the “polarizing layer” refers to a linearly polarizing layer having a property of transmitting linearly polarized light having a vibration plane perpendicular to the absorption axis when non-polarized light is incident.

(Linear polarizing layer (polarizing layer))
The polarizing layer included in the polarizing functional layer is preferably a layer obtained by aligning a polyvinyl alcohol resin film and adsorbing and aligning a dichroic dye such as iodine. The polarizing layer may be one in which a dichroic dye is adsorbed and oriented on a single-layer polyvinyl alcohol resin film (one obtained by orienting polyvinyl alcohol molecules contained in the polyvinyl alcohol resin film). It may be a laminated film of two or more layers provided with a polyvinyl alcohol resin layer in which a functional dye is adsorbed and oriented. Such a polarizing layer can be produced by various methods known in the art.

(Polarizer)
The polarizing functional layer may be a polarizing plate. The polarizing plate is typically a polarizing plate formed by bonding a protective layer (protective film) on one or both sides of a polarizing layer in a form in which a dichroic dye is adsorbed and oriented on a polyvinyl alcohol resin film. As this protective layer, for example, a layer made of a resin material having excellent transparency, mechanical strength, thermal stability, stretchability and the like is used. Specifically, polyolefin resins such as polyethylene and polypropylene; cyclic polyolefin resins such as norbornene polymers; polyester resins such as polyethylene terephthalate and polyethylene naphthalate; (meth) acrylic acid, poly (meth) methyl acrylate, etc. (Meth) acrylic acid resins; cellulose ester resins such as triacetyl cellulose, diacetyl cellulose and cellulose acetate propionate; vinyl alcohol resins such as polyvinyl alcohol and polyvinyl acetate; polycarbonate resins; polystyrene resins; Arylate resin; Polysulfone resin; Polyethersulfone resin; Polyamide resin; Polyimide resin; Polyether ketone resin; Polyphenylene sulfide resin; Ren'okishido resins, and mixtures thereof, may be mentioned copolymer and the like. Among these resins, it is preferable to use any of cyclic polyolefin-based resins, polyester-based resins, cellulose ester-based resins and (meth) acrylic acid-based resins, or a mixture thereof. The “(meth) acrylic acid” means “at least one of acrylic acid and methacrylic acid”.

  The protective layer may be a single layer obtained by mixing one type or two or more types of resin materials or may have a multilayer structure of two or more layers. In the case of having a multilayer structure, the resins constituting each layer may be the same as or different from each other. When the protective layer is a film formed of a resin material, an arbitrary additive may be added to the protective layer. Examples of the additive include an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a release agent, an anti-coloring agent, a flame retardant, a nucleating agent, an antistatic agent, a pigment, and a coloring agent.

  The thickness of the polarizing layer in which the dichroic dye is adsorbed and oriented on the polyvinyl alcohol resin film is preferably 20 μm or less, and more preferably 10 μm or less.

  The polarizing functional layer of the circularly polarizing plate of the present invention is particularly preferably one in which a protective layer is bonded only on one side of the polarizing layer (hereinafter referred to as “single protective polarizing plate”). As described above, the first liquid crystal layer and the second liquid crystal layer are formed from a polymerizable liquid crystal compound and are extremely thin. If the linear polarizing plate is a single protective polarizing plate, the thickness thereof is thin, and as a result, the thickness of the circularly polarizing plate of the present invention can be reduced. Therefore, for example, when the organic EL display device provided with the circularly polarizing plate of the present invention is a flexible organic EL display device capable of bending, winding, etc., it is difficult to affect bending, winding, etc. Very advantageous. The thickness of the protective layer in the single protective polarizing plate can be optimized according to the thickness of the polarizing layer itself, but in order to ensure good flexibility of the circularly polarizing plate of the present invention, the thickness is preferably 50 μm or less, More preferably, it is 30 μm or less.

  As the above-mentioned piece protective polarizing plate, for example, those disclosed in JP-A-2016-1222025 and the like can be used.

  The polarizing layer included in the polarizing functional layer of the circularly polarizing plate of the present invention is a cured film obtained by aligning a dichroic dye on a polymerizable liquid crystal compound and polymerizing the polymerizable liquid crystal compound as described above. May be. In this case, the polarizing layer is usually coated with a composition containing a polymerizable liquid crystal compound and a dichroic dye on a base material layer or an alignment layer provided on the base layer, and then dried, and active such as ultraviolet rays. It can be obtained by polymerizing and curing the polymerizable liquid crystal compound contained in the coating film by energy ray irradiation. The laminate of the substrate and the polarizing layer (cured film) thus obtained can be used as a single protective polarizing plate.

  Although the thickness of the base material layer for forming the cured film is not particularly limited, it is generally preferably 1 to 300 μm and more preferably 10 to 200 μm from the viewpoint of workability such as strength and handleability. Preferably, it is 30-120 micrometers.

(First base material layer and second base material layer)
The first base material layer and the second base material layer (hereinafter, both may be collectively referred to as “base material layer”) are preferably films formed of a resin material. For example, a resin material that is excellent in transparency, mechanical strength, thermal stability, stretchability, and the like is used as the resin material as well as the material that forms the protective film of the polarizing plate. The resin material illustrated as a protective layer of a polarizing plate can be used for the typical example and suitable example of a resin material.

  The base material layer may be a single layer or a mixture of two or more resin materials, or may have a multilayer structure of two or more layers. When it has a multilayer structure, the resin material which comprises each layer may be mutually the same, and may differ. When the base material layer is a film formed of a resin material, an arbitrary additive may be added to the base material layer. Examples of the additive include an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a release agent, an anti-coloring agent, a flame retardant, a nucleating agent, an antistatic agent, a pigment, and a coloring agent.

  The thickness of the base material layer for forming the liquid crystal layer is not particularly limited, but is generally preferably 1 to 300 μm, more preferably 10 to 200 μm from the viewpoint of workability such as strength and handleability, More preferably, it is 30-120 micrometers.

(First alignment layer and second alignment layer)
The first alignment layer and the second alignment layer that may be included in the circularly polarizing plate (hereinafter, both may be collectively referred to as “alignment layer”) are polymerizable in the liquid crystal layer formed thereon. It has an alignment regulating force for aligning liquid crystal compounds in a desired direction. Examples of the alignment layer include an alignment polymer layer formed of an alignment polymer, a photo-alignment polymer layer formed of a photo-alignment polymer, and a groove alignment layer having a concavo-convex pattern and a plurality of grooves (grooves) on the surface of the layer. Can do. The thickness of the alignment layer is usually 10 to 500 nm, preferably 10 to 200 nm.

  The orientation polymer layer can be formed by applying a composition obtained by dissolving the orientation polymer in a solvent to the base material layer to remove the solvent, and performing a rubbing treatment as necessary. In this case, in the orientation polymer layer formed of the orientation polymer, the orientation regulating force can be arbitrarily adjusted depending on the surface state of the orientation polymer and the rubbing conditions.

  The photo-alignable polymer layer can be formed by applying a composition containing a photoreactive group-containing polymer or monomer and a solvent to the base material layer and irradiating polarized light. In this case, in the photo-alignable polymer layer, the alignment regulating force can be arbitrarily adjusted depending on the polarization irradiation conditions for the photo-alignable polymer.

  The groove alignment layer is an active method for forming a concavo-convex pattern by performing exposure, development, etc. through an exposure mask having a pattern-shaped slit on the photosensitive polyimide film surface, a plate-shaped master having grooves on the surface, and the like. A method of forming an uncured layer of energy beam curable resin, transferring this layer to a base material layer and curing, forming an uncured layer of active energy ray curable resin on the base material layer, It can be formed by, for example, a method of forming unevenness by pressing a roll-shaped master having unevenness, and curing it.

(First liquid crystal layer and second liquid crystal layer)
The first liquid crystal layer and the second liquid crystal layer (hereinafter, both may be collectively referred to as “liquid crystal layer”) are formed using a polymerizable liquid crystal compound, and this polymerizable liquid crystal compound is publicly known. Can be used. The kind of the polymerizable liquid crystal compound is not particularly limited, and a rod-like liquid crystal compound, a disk-like liquid crystal compound, and a mixture thereof can be used. Here, the polymerizable liquid crystal compound for forming a reverse wavelength-dispersible quarter-wave plate is preferably a rod-like liquid crystal compound, for example, a polymerizable liquid crystal compound described in JP-A-2011-207765. When using such a polymerizable liquid crystal compound, a liquid crystal layer forming composition containing a polymerizable liquid crystal compound, a solvent, and various additives as required is applied on the alignment layer to form a coating film, By curing this coating film, a liquid crystal layer which is a liquid crystal cured layer can be formed. Alternatively, a liquid crystal layer forming composition may be applied on the base material layer to form a coating film, and the coating film may be stretched together with the base material layer to form the liquid crystal layer. The liquid crystal layer may be a retardation layer.

  The composition for forming a liquid crystal layer may contain a polymerization initiator, a reactive additive, a leveling agent, a polymerization inhibitor and the like in addition to the polymerizable liquid crystal compound and the solvent described above. As the polymerizable liquid crystal compound, the solvent, the polymerization initiator, the reactive additive, the leveling agent, the polymerization inhibitor and the like, known ones can be appropriately used. Examples of the leveling agent that may be contained in the liquid crystal layer forming composition and the liquid crystal layer include, for example, a leveling agent mainly composed of an organically modified silicone oil, a leveling agent mainly composed of a polyacrylate compound, and a perfluoroalkyl. And a leveling agent having a fluorine atom-containing compound as a main component. Here, the main component means a component having the largest blending amount among all the components contained in the leveling agent. Among the above, it is preferable to use a leveling agent mainly composed of a polyacrylate compound or a leveling agent mainly composed of a fluorine atom-containing compound such as perfluoroalkyl. The content of the leveling agent in the composition for forming a liquid crystal layer is preferably 0.01 to 5 parts by mass, and preferably 0.1 to 3 parts by mass with respect to 100 parts by mass of the polymerizable liquid crystal compound.

  As described above, in the circularly polarizing plate of the present invention, since the first liquid crystal layer preferably contains a leveling agent, the liquid crystal layer forming composition for forming the first liquid crystal layer preferably contains a leveling agent. .

(Adhesive layer)
The adhesive layer is an adhesive layer that is provided between the first liquid crystal layer and the second liquid crystal layer and is used to bond these two liquid crystal layers. The adhesive layer may be in direct contact with the first liquid crystal layer and the second liquid crystal layer, but the first alignment layer provided on the first liquid crystal layer or the second alignment layer provided on the second liquid crystal layer. You may be in direct contact.

  The adhesive layer can be formed of an adhesive, a pressure-sensitive adhesive, and a combination thereof, and is usually one layer, but may be two or more layers. When the adhesive layer is composed of two or more layers, each layer may be formed of the same material, or may be formed of different materials.

  As an adhesive agent, it can form, for example, combining 1 type (s) or 2 or more types among a water-system adhesive agent, an active energy ray hardening-type adhesive agent, an adhesive, etc. Examples of the aqueous adhesive include an aqueous polyvinyl alcohol resin solution, an aqueous two-component urethane emulsion adhesive, and the like. The active energy ray-curable adhesive is an adhesive that is cured by irradiating active energy rays such as ultraviolet rays, for example, an adhesive containing a polymerizable compound and a photopolymerizable initiator, an adhesive containing a photoreactive resin, Examples include those containing a binder resin and a photoreactive crosslinking agent. 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 cation radical, irradiating active energy rays, such as an ultraviolet-ray, can be mentioned.

  Examples of the pressure-sensitive adhesive include compositions in which a (meth) acrylic resin, styrene resin, silicone resin, or the like is used as a base polymer and a crosslinking agent such as an isocyanate compound, an epoxy compound, or an aziridine compound is added.

  The adhesive layer is preferably formed using an active energy ray-curable adhesive, and particularly preferably formed using an adhesive containing an ultraviolet curable epoxy monomer and a photocationic polymerization initiator.

  If necessary, surface treatment such as corona treatment, plasma treatment, or flame treatment may be performed on the surface of the layer on which the adhesive layer is formed.

  The adhesive layer is preferably an adhesive cured layer. In this case, the adhesive composition layer is a layer formed using an adhesive, and the adhesive is preferably an active energy ray-curable adhesive such as an ultraviolet curable adhesive. When the circularly polarizing plate is applied to a flexible organic EL display device, the circularly polarizing plate may be bent along with the bending or winding of the flexible organic EL display device due to the adhesive layer being an adhesive hardened layer. Even when it is wound, it is easy to suppress the occurrence of wrinkles between the first liquid crystal layer and the second liquid crystal layer.

  As mentioned above, although the adhesive agent and adhesive which form an adhesive layer were demonstrated, in the circularly-polarizing plate of this invention, the adhesive layer for bonding a 1st liquid crystal layer and a 2nd liquid crystal layer uses an adhesive agent. The formed adhesive cured layer is preferable.

(Adhesive layer for polarizing plate)
The polarizing plate adhesive layer can be formed of an adhesive, a pressure-sensitive adhesive, and a combination thereof, and is usually one layer, but may be two or more layers. When the polarizing plate adhesive layer is composed of two or more layers, the respective layers may be formed of the same material or different materials. Examples of the adhesive and pressure-sensitive adhesive for forming the polarizing plate adhesive layer include the same adhesives and pressure-sensitive adhesives used for the adhesive layer. You may perform surface treatments, such as a corona treatment, a plasma treatment, a flame treatment, with respect to the surface of the layer in which the adhesive layer for polarizing plates is formed.

(Adhesive composition layer for optical elements)
The adhesive composition layer for optical elements can be formed of an adhesive, a pressure-sensitive adhesive, and a combination thereof, and is usually one layer, but may be two or more layers. When the adhesive composition layer for an optical element is composed of two or more layers, each layer may be formed of the same material or different materials. Examples of the adhesive and pressure-sensitive adhesive forming the adhesive composition layer for optical elements include the same adhesives and pressure-sensitive adhesives used for the above-mentioned adhesive layer. The adhesive composition layer for optical elements is preferably formed using an adhesive. You may perform surface treatments, such as a corona treatment, a plasma treatment, a flame treatment, with respect to the surface of the layer in which the adhesive composition layer for optical elements is formed. The adhesive composition layer for optical elements is preferably a pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated further more concretely, this invention is not limited by these examples. Unless otherwise specified, “%” and “part” in the examples are mass% and mass part.

[Preparation of adhesive composition]
After mixing the cationic curing components a1 to a3 and the cationic polymerization initiator shown below, the cationic polymerization initiator and sensitizer shown below are further mixed and defoamed to prepare a photocurable adhesive composition. did. In addition, the following compounding quantity is based on solid content.
Cationic curable component a1 (70 parts):
3 ′, 4′-epoxycyclohexylmethyl 3 ′, 4′-epoxycyclohexanecarboxylate (trade name: CEL2021P, manufactured by Daicel Corporation)
Cationic curable component a2 (20 parts):
Neopentyl glycol diglycidyl ether (trade name: EX-211, manufactured by Nagase ChemteX Corporation)
Cationic curable component a3 (10 parts):
2-ethylhexyl glycidyl ether (trade name: EX-121, manufactured by Nagase ChemteX Corporation)
Cationic polymerization initiator (2.25 parts (solid content)):
Product name: 50% propylene carbonate solution / sensitizer (2 parts) of CPI-100 (manufactured by San Apro Co., Ltd.):
1,4-diethoxynaphthalene

・溶剤（９５部）：シクロペンタノン [Comparative Example 1]
(Preparation of composition for forming photo-alignment layer)
The following components were mixed, and the resulting mixture was stirred at a temperature of 80 ° C. for 1 hour to obtain a composition for forming a photoalignment layer.
-Photo-alignment material (5 parts):

Solvent (95 parts): cyclopentanone

・重合性液晶化合物Ａ２（２０部）：

・重合開始剤（６部）：
２−ジメチルアミノ−２−ベンジル−１−（４−モルホリノフェニル）ブタン−１−オン（イルガキュア３６９；チバスペシャルティケミカルズ社製）
・レベリング剤（０．１部）：
ポリアクリレート化合物（ＢＹＫ−３６１Ｎ；ＢＹＫ−Ｃｈｅｍｉｅ社製）
・溶剤（４００部）：シクロペンタノン (Preparation of liquid crystal layer forming composition (A))
The following components were mixed, and the resulting mixture was stirred at 80 ° C. for 1 hour to obtain a liquid crystal layer forming composition (A). The polymerizable liquid crystal compound A1 can be synthesized by a method for synthesizing the compound (A11-1) described in JP2011-207765A. The polymerizable liquid crystal compound A2 can be synthesized by the method for synthesizing the compound (x-1) described in JP2010-31223A.
Polymerizable liquid crystal compound A1 (80 parts):

Polymerizable liquid crystal compound A2 (20 parts):

-Polymerization initiator (6 parts):
2-Dimethylamino-2-benzyl-1- (4-morpholinophenyl) butan-1-one (Irgacure 369; manufactured by Ciba Specialty Chemicals)
・ Leveling agent (0.1 parts):
Polyacrylate compound (BYK-361N; manufactured by BYK-Chemie)
Solvent (400 parts): cyclopentanone

(Manufacture of polarizing plates)
For example, according to the method as described in the Example of Unexamined-Japanese-Patent No. 2016-1222025, the polarizing plate (single protective polarizing plate) by which the protective film was bonded on one side is manufactured.

(Production of first liquid crystal layer (1) with a base material layer)
Using a polyethylene terephthalate (PET) film having a thickness of 100 μm as a base material layer, and using a corona treatment device (AGF-B10, manufactured by Kasuga Denki Co., Ltd.) on this PET film, under conditions of an output of 0.3 kW and a treatment speed of 3 m / min. Processed once. A composition for forming a photo-alignment layer is applied to the corona-treated surface using a bar coater, dried at 80 ° C. for 1 minute, and a polarized UV irradiation device (SPOT CURE SP-7; manufactured by USHIO INC.) Then, polarized UV exposure was carried out with an integrated light amount of 100 mJ / cm ² to obtain a photo-alignment layer. It was 100 nm when the thickness of the obtained photo-alignment layer was measured with the laser microscope (LEXT, Olympus Corporation make).

Subsequently, the liquid crystal layer forming composition (A) was applied onto the photo-alignment layer using a bar coater and dried at 120 ° C. for 1 minute, and then a high-pressure mercury lamp (Unicure VB-15201BY-A, USHIO INC.) By using UV light (under a nitrogen atmosphere, wavelength: 365 nm, integrated light quantity at wavelength 365 nm: 1000 mJ / cm ² ), a liquid crystal layer as a retardation layer is formed, and a substrate layer is attached. A first liquid crystal layer (1) was obtained. The thickness of the liquid crystal layer was 2 μm.

  About the obtained 1st liquid crystal layer (1) with a base material layer, when the adhesive composition mentioned above was apply | coated to the opposite side to the base material layer of a liquid crystal layer, and the application surface was observed visually, repelling was seen. .

  Thus, if a piece of protective polarizing plate is bonded through an adhesive layer in which repelling is observed (adhesive composition on the first liquid crystal layer (1)), the resulting circularly polarizing plate is based on this repelling. Appearance abnormality is thought to be observed.

[Example 1]
A first liquid crystal layer (1) with a base material layer was obtained in the same procedure as in Comparative Example 1. The liquid crystal layer side of the obtained first liquid crystal layer (1) with a base material layer is placed on a glass substrate [non-alkali made by Corning, Inc.] via a 5 μm thick sheet-like adhesive [“NCF # L2” manufactured by Lintec Corporation]. After bonding to glass “Eagle XG”, thickness 0.2 mm], the base material layer was peeled off to obtain a liquid crystal layer with a glass substrate. Only the base material layer was peeled off, and the photo-alignment layer remained without being peeled off. When the above-mentioned adhesive composition was applied to the release side of the base material layer of the liquid crystal layer in the liquid crystal layer with a glass substrate and the coated surface was visually observed, the first liquid crystal layer with the base material layer observed in Comparative Example 1 ( There was less repellency than the coated surface where the adhesive composition was applied to the liquid crystal layer side of 1).

  In this way, when the single protective polarizing plate is bonded through an adhesive layer (adhesive composition on the first liquid crystal layer (1)) with little repellency, the resulting circularly polarizing plate has excellent appearance. Conceivable.

  From the results of Example 1 and Comparative Example 1, the surface exposed by peeling the base material layer from the first liquid crystal layer with the base material layer (1) has little repelling, so the affinity for the adhesive composition is high, It is considered that the adhesive composition layer has excellent adhesion when formed.

[Comparative Example 2]
(Preparation of composition for alignment layer formation)
2-Butoxyethanol was added to Sunever SE-610 (manufactured by Nissan Chemical Industries, Ltd.), which is a commercially available orientation polymer, to obtain an alignment layer forming composition. The obtained composition for forming an alignment layer had a solid content of 1% with respect to the total amount of the composition, and a solvent content of 99% with respect to the total amount of the composition. The amount of solid content of Sun Ever SE-610 was converted from the concentration described in the delivery specification.

・重合開始剤（０．５％）：
イルガキュア（登録商標）９０７（ＢＡＳＦジャパン社製）
・レベリング剤（０．１％）：
ＢＹＫ３６１Ｎ（ビックケミージャパン製）
・反応添加剤（１．１％）：
Ｌａｒｏｍｅｒ（登録商標）ＬＲ−９０００（ＢＡＳＦジャパン社製）
・溶剤（７９．１％）：プロピレングリコール１−モノメチルエーテル２−アセタート
厚み３８μｍのポリエチレンテレフタレート（ＰＥＴ）フィルムを、コロナ処理装置（ＡＧＦ−Ｂ１０、春日電機株式会社製）を用いて出力０．３ｋＷ、処理速度３ｍ／分の条件で１回処理した。コロナ処理を施した表面に、配向層形成用組成物をバーコーターを用いて塗布し、９０℃で１分間乾燥し、配向層を得た。得られた配向層の厚みをレーザー顕微鏡（ＬＥＸＴ、オリンパス株式会社製）で測定したところ、３４ｎｍであった。 (Preparation of liquid crystal layer forming composition (B))
The following components were mixed, and the resulting mixture was stirred at 80 ° C. for 1 hour, and then cooled to room temperature to obtain a liquid crystal layer forming composition (B).
Polymerizable liquid crystal compound LC242 (manufactured by BASF) (19.2%):

-Polymerization initiator (0.5%):
Irgacure (registered trademark) 907 (BASF Japan)
-Leveling agent (0.1%):
BYK361N (manufactured by Big Chemie Japan)
Reaction additive (1.1%):
Laromer (registered trademark) LR-9000 (manufactured by BASF Japan)
Solvent (79.1%): Propylene glycol 1-monomethyl ether 2-acetate A polyethylene terephthalate (PET) film having a thickness of 38 μm is output 0.3 kW using a corona treatment device (AGF-B10, manufactured by Kasuga Denki Co., Ltd.). The treatment was performed once under the condition of a treatment speed of 3 m / min. The alignment layer-forming composition was applied to the corona-treated surface using a bar coater and dried at 90 ° C. for 1 minute to obtain an alignment layer. It was 34 nm when the thickness of the obtained alignment layer was measured with the laser microscope (LEXT, Olympus Corporation make).

Subsequently, the composition for forming a liquid crystal layer (B) was applied onto the alignment layer using a bar coater, dried at 90 ° C. for 1 minute, and then a high-pressure mercury lamp (UNICURE VB-15201BY-A, USHIO INC.). The liquid crystal layer as a retardation layer is formed by irradiating with ultraviolet rays (in a nitrogen atmosphere, wavelength: 365 nm, integrated light quantity at wavelength 365 nm: 1000 mJ / cm ² ). One liquid crystal layer (2) was obtained. The thickness of the liquid crystal layer was 1 μm.

  About the obtained 1st liquid crystal layer (2) with a base material layer, when the adhesive composition mentioned above was apply | coated to the opposite side to the base material layer of a liquid crystal layer and the application surface was observed visually, repellency was seen. .

  In this way, if a single protective polarizing plate is bonded through an adhesive layer (adhesive composition on the first liquid crystal layer (2)) in which repelling is observed, the resulting circularly polarizing plate is based on this repelling. Appearance abnormality is thought to be observed.

[Example 2]
A first liquid crystal layer (2) with a base material layer was obtained in the same procedure as in Comparative Example 2. The liquid crystal layer side of the obtained first liquid crystal layer (2) with a base material layer was placed on a glass substrate [Non-alkali made by Corning, Inc.] via a 5 μm-thick sheet-like adhesive [“NCF # L2” manufactured by Lintec Corporation]. After bonding to glass “Eagle XG”, thickness 0.2 mm], the base material layer was peeled off to obtain a liquid crystal layer with a glass substrate. The alignment layer was peeled off along with the peeling of the base material layer. When the application surface which apply | coated the above-mentioned adhesive composition to the peeling side of the base material layer of a liquid crystal layer in a liquid crystal layer with a glass substrate was observed visually, the 1st liquid crystal layer with a base material layer (2) observed in Comparative Example 2 (2) ) Was less repelled than the coated surface where the adhesive composition was coated on the liquid crystal layer side.

  Thus, if a piece of protective polarizing plate is bonded through an adhesive layer with little repellency (adhesive composition on the first liquid crystal layer (2)), the resulting circularly polarizing plate has excellent appearance. Conceivable.

  From the results of Example 2 and Comparative Example 2, the surface exposed by peeling off the base material layer from the first liquid crystal layer with the base material layer (2) has little repelling, so the affinity for the adhesive composition is high, It is considered that the adhesive composition layer has excellent adhesion when formed.

  DESCRIPTION OF SYMBOLS 10 1st liquid crystal layer with a base material layer, 11 1st base material layer, 12 1st liquid crystal layer, 20 2nd liquid crystal layer with a base material layer, 21 2nd base material layer, 22 2nd liquid crystal layer, 30 adhesive layer, 30a Adhesive composition layer, 31 Adhesive layer for polarizing plate (adhesive layer for polarizing functional layer), 31a Adhesive composition layer for polarizing plate (adhesive composition layer for polarizing functional layer), 34 Adhesive layer, 35 Adhesive composition for optical element Physical layer, 36 adhesive layer for polarizing plate (adhesive layer for polarizing functional layer), 36a adhesive composition layer for polarizing plate (adhesive composition layer for polarizing functional layer), 41 liquid crystal layer-containing layer with base material layer (second layer) Liquid crystal layer-containing layer with base material layer), 42 liquid crystal layer-containing layer, 43 liquid crystal layer-containing layer with composition layer (second liquid crystal layer-containing layer with composition layer), 46 liquid crystal layer-containing layer with base material layer (first 1 liquid crystal layer-containing layer with a substrate layer), 47 liquid crystal layer-containing layer, 48 liquid crystal layer-containing layer with a composition layer (first Liquid crystal layer-containing layer with composition layer), 51 circularly polarizing plate with substrate layer (circularly polarizing plate), 52 circularly polarizing plate, 53 circularly polarizing plate with adhesive composition layer (circularly polarizing plate), 56 circle with substrate layer Polarizing plate (circular polarizing plate), 57 Circular polarizing plate, 58 Circular polarizing plate with adhesive composition layer (circular polarizing plate), 60 Polarizing plate (polarization functional layer), 61 Polarizing plate with composition layer (polarization with composition layer) Functional layer), W width direction.

Claims (15)

A polarizing functional layer comprising at least a linear polarizing layer, a polarizing functional layer adhesive layer, a first liquid crystal layer, an adhesive layer, and a second liquid crystal layer in this order, a method for producing a circularly polarizing plate,
The adhesive layer, the second liquid crystal layer, and the second base material layer are arranged in this order on the first liquid crystal layer side of the first liquid crystal layer with the base material layer having the first base material layer and the first liquid crystal layer. Preparing a liquid crystal layer-containing layer with a first base material layer,
Peeling the first base material layer from the liquid crystal layer-containing layer with the first base material layer to form an exposed surface on the first base material layer side of the first liquid crystal layer;
Obtaining a liquid crystal layer-containing layer with a first composition layer provided with an adhesive composition layer for polarizing functional layer for forming the adhesive layer for polarizing functional layer on the exposed surface;
Bonding the polarizing functional layer to the polarizing functional layer adhesive composition layer of the liquid crystal layer-containing layer with the first composition layer,
The first liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer,
The first liquid crystal layer and the second liquid crystal layer may have the following [a] or [b]:
[A] The first liquid crystal layer is a half-wave plate, and the second liquid crystal layer is a quarter-wave plate.
[B] One of the first liquid crystal layer and the second liquid crystal layer is a quarter wavelength plate with reverse wavelength dispersion, and the other is a positive C plate.
The manufacturing method of the circularly-polarizing plate which satisfy | fills these relationships. A polarizing functional layer comprising at least a linear polarizing layer, a polarizing functional layer adhesive layer, a first liquid crystal layer, an adhesive layer, and a second liquid crystal layer in this order, a method for producing a circularly polarizing plate,
The polarizing functional layer, the polarizing functional layer adhesive layer, and the first liquid crystal layer with the base material layer having the first liquid crystal layer and the first base material layer in this order from the polarizing functional layer adhesive layer side, A step of preparing a liquid crystal layer-containing layer with a second base material layer in order;
Peeling the first base material layer from the liquid crystal layer-containing layer with the second base material layer to form an exposed surface on the first base material layer side of the first liquid crystal layer;
Obtaining a liquid crystal layer-containing layer with a second composition layer provided with an adhesive composition layer for forming the adhesive layer on the exposed surface;
The second liquid crystal layer side of the second liquid crystal layer with the base material layer having the second base material layer and the second liquid crystal layer is pasted on the adhesive composition layer of the liquid crystal layer-containing layer with the second composition layer. Combining the steps,
The first liquid crystal layer is obtained by polymerizing a polymerizable liquid crystal compound on the first base material layer,
The first liquid crystal layer and the second liquid crystal layer may have the following [a] or [b]:
[A] The first liquid crystal layer is a half-wave plate, and the second liquid crystal layer is a quarter-wave plate.
[B] One of the first liquid crystal layer and the second liquid crystal layer is a quarter wavelength plate with reverse wavelength dispersion, and the other is a positive C plate.
The manufacturing method of the circularly-polarizing plate which satisfy | fills these relationships. The step of preparing the liquid crystal layer-containing layer with the second base material layer,
Preparing a polarizing functional layer with a composition layer provided with the polarizing functional layer adhesive composition layer for forming the polarizing functional layer adhesive layer on the polarizing functional layer;
A step of bonding the first liquid crystal layer side of the first liquid crystal layer with the base material layer to the adhesive functional layer for the polarizing functional layer of the polarizing functional layer with the composition layer. Of manufacturing a circularly polarizing plate. The first liquid crystal layer with a base material layer includes a first alignment layer between the first liquid crystal layer and the first base material layer,
The process for forming the exposed surface is a method for producing a circularly polarizing plate according to any one of claims 1 to 3, wherein the first alignment layer is peeled off together with the first base material layer. The first liquid crystal layer with a base material layer includes a first alignment layer between the first liquid crystal layer and the first base material layer,
2. The circularly polarizing plate according to claim 1, wherein the liquid crystal layer-containing layer with the first composition layer has the first alignment layer between the first liquid crystal layer and the adhesive composition layer for the polarizing functional layer. Manufacturing method. The first liquid crystal layer with a base material layer includes a first alignment layer between the first liquid crystal layer and the first base material layer,
4. The circularly polarizing plate according to claim 2, wherein the liquid crystal layer-containing layer with the second composition layer has the first alignment layer between the first liquid crystal layer and the adhesive composition layer. Method.   The said 1st liquid crystal layer is a manufacturing method of the circularly-polarizing plate of any one of Claims 1-6 containing a leveling agent.   The said adhesive layer is a manufacturing method of the circularly-polarizing plate of any one of Claims 1-7 which is an adhesive cured layer or an adhesive layer. The adhesive layer is an adhesive cured layer,
The manufacturing method of the circularly-polarizing plate of any one of Claims 1-8 in which the adhesive composition layer for forming the said adhesive layer contains an active energy ray hardening-type adhesive agent.   The manufacturing method of the circularly-polarizing plate of any one of Claims 1-9 whose said 1st liquid crystal layer is a 1/2 wavelength plate and whose said 2nd liquid crystal layer is a 1/4 wavelength plate.   The manufacturing method of the circularly-polarizing plate of any one of Claims 1-9 whose said 1st liquid crystal layer is a quarter wavelength plate of a reverse wavelength dispersion, and a said 2nd liquid crystal layer is a positive C plate. .   The method for producing a circularly polarizing plate according to claim 1, wherein the polarizing functional layer adhesive layer is an adhesive cured layer or a pressure-sensitive adhesive layer.   The said 2nd liquid crystal layer is a manufacturing method of the circularly-polarizing plate of any one of Claims 1-12 obtained by superposing | polymerizing a polymeric liquid crystal compound on the said 2nd base material layer.   The manufacturing method of the circularly-polarizing plate of any one of Claims 1-13 including the process of peeling a said 2nd base material layer after the said process to bond.   The method for producing a circularly polarizing plate according to claim 1, wherein the polarizing functional layer is a polarizing plate including a protective layer on at least one surface of the linearly polarizing layer.

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