TW202003222A - Laminated article and method for producing the same - Google Patents

Abstract

Provided is a laminated article containing a first matrix layer, a first functional layer, an adhesive layer, a second functional layer and a second matrix layer in this order, In at least one end in the width direction of the laminated article, the position of an end of the adhesive layer satisfies all of the following relationships [a] to [c]: [a] the same as the position of an end of the first matrix layer, or at the inner side in the width direction of the position of an end of the first matrix layer, [b] at the outer side in the width direction of the position of an end of the first functional layer, and [c] the same as the position of an end of the second function layer, or at the inner side in the width direction of the position of an end of the second function layer.

Description

Laminated body and its manufacturing method

The present invention relates to a laminate and a method of manufacturing the same.

A display device such as an organic EL display device or a liquid crystal display device uses a member including a polarizing layer or a phase difference layer. Patent Documents 1 and 2 describe using a liquid crystal material as a retardation layer of an optical film used for a circular polarizing plate or the like. Patent Documents 1 and 2 describe that the support substrate is peeled off from the laminate in which the support substrate, the alignment layer, the phase difference layer, the adhesion layer, the phase difference layer, the alignment layer, and the support substrate are sequentially laminated.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2015-21976.

Patent Document 2: Japanese Patent Laid-Open No. 2015-22248.

An object of the present invention is to provide a laminated body suitable as an optical product material and a method for manufacturing the same.

The present invention provides the layered product shown below and a method for manufacturing the layered product.

[1] A laminate comprising a first substrate layer, a first functional layer, an adhesive layer, a second functional layer, and a second substrate layer in sequence, wherein at least one end in the width direction of the laminate In the above, the position of the end of the adhesive layer satisfies all the relationships of the following [a] to [c], [a] is the same as the position of the end of the first base material layer, or is located more than the first base material layer The position of the end is located inward in the width direction; [b] is located outside in the width direction from the position of the end of the first functional layer; and [c] is located at the same position as the end of the second functional layer, or It is located inward in the width direction from the end of the second functional layer.

(The laminate is hereinafter referred to as "laminate (1)".)

[2] The laminate as described in [1], wherein the position of the end of the bonding layer satisfies all the relationships of the above [a] to [c] at both ends in the width direction of the laminate.

[3] The laminate as described in [1] or [2], wherein the first functional layer and the second functional layer are each a liquid crystal layer.

[4] The laminate according to any one of [1] to [3], wherein at least one of the first functional layer and the second functional layer is a phase difference layer.

[5] A laminate including a first base material layer, a first functional layer, an adhesive layer, and a second functional layer in sequence, and at least one end of the laminate in the width direction, an end of the adhesive layer The position of satisfies all the relationships of the following [a], [b] and [d], [a] is the same as the position of the end of the first base material layer, or is located more than the end of the first base material layer The position is located inward in the width direction; [b] is located outward in the width direction from the position of the end of the first functional layer; and [d] is the same as the position of the end of the second functional layer.

(This laminate is hereinafter referred to as "laminate (2).")

[6] The laminate according to [5], wherein the position of the end of the bonding layer satisfies all the relationships of the above [a], [b], and [d] at both ends in the width direction of the laminate .

[7] The laminate as described in [5] or [6], wherein the first functional layer and the second 2'functional layer are liquid crystal layers, respectively.

[8] The laminate according to any one of [5] to [7], wherein at least one of the first functional layer and the second 2′ functional layer is a phase difference layer.

[9] The laminate as described in any one of [5] to [8] further contains a resin film, and the resin film is laminated on the second 2′ functional layer side via a resin film adhesive layer.

(This laminate is hereinafter referred to as "laminate (3).")

[10] The laminate according to [9], wherein at least one end in the width direction of the laminate, the position of the end of the adhesive layer for the resin film is the same as the position of the end of the first functional layer Or, it is located inward in the width direction from the position of the end of the first functional layer.

[11] The laminate according to [9] or [10], wherein the resin film is an optical film.

[12] A method for manufacturing a layered body, the layered system sequentially including a first base material layer, a first functional layer, an adhesive layer, a second functional layer, and a second base material layered body, and a method for manufacturing the layered body It includes the following steps: a step of preparing a first build-up section, the first build-up section containing the first base material layer and the first functional layer; a step of preparing a second build-up section, the second build-up section containing the first 2 a base material layer and the second functional layer; and a step of laminating the first layered portion and the second layered portion so that the first functional layer and the second functional layer face each other through the adhesive layer; In at least one end in the width direction of the laminate, the position of the end of the adhesive layer satisfies all the relationships of the following [a] to [c] [a] is the same as the position of the end of the first base material layer, Or located on the inner side in the width direction from the end of the first base material layer; [b] located on the outer side in the width direction from the end of the first functional layer; and [c] and the second function The position of the end of the layer is the same, or it is located inward in the width direction from the position of the end of the second functional layer.

[13] A method for manufacturing a layered product, the layered system sequentially including a first substrate layer, a first functional layer, an adhesive layer, and a 2'functional layer, the method for manufacturing the layered product includes the following steps: [1] to [4] the step of the laminate according to any one of the steps; and the step of peeling the second base material layer from the laminate.

[14] A method for manufacturing a laminate, comprising the following steps: the step of preparing the laminate as described in any one of [5] to [8]; and the second 2′ functional layer side partition of the laminate The step of stacking the resin film with the adhesive layer for the resin film.

[15] A method for manufacturing a laminate, comprising the following steps: a step of preparing the laminate as described in any one of [9] to [11]; and a step of peeling the first substrate layer from the laminate .

According to the present invention, it is possible to provide a laminated body suitable as an optical product material and a manufacturing method thereof.

10‧‧‧The first buildup department

11‧‧‧The first substrate layer

12‧‧‧1st functional layer (1st liquid crystal layer)

12'‧‧‧1st functional layer (1st liquid crystal layer)

20‧‧‧ 2nd buildup department

21‧‧‧The second substrate layer

22‧‧‧2nd functional layer (2nd liquid crystal layer)

22x‧‧‧Next layer formation area

22y‧‧‧no layer formed area

22'‧‧‧2nd functional layer (2nd liquid crystal layer)

22"‧‧‧2nd functional layer (2nd liquid crystal layer)

30, 30'‧‧‧Next layer

36‧‧‧ Adhesive layer for optical film

41‧‧‧Layered body (1)

42‧‧‧Layered body (2)

45‧‧‧ Middle layer

51‧‧‧Layered body (3)

52‧‧‧Optical laminate

60‧‧‧Optical film (resin film)

Fig. 1 is a schematic cross-sectional view schematically showing an example of a laminate (1).

Figures 2 (a) and (b) are schematic cross-sectional views schematically showing an example of the manufacturing process of the laminate (1).

Fig. 3 is a schematic cross-sectional view schematically showing an example of a laminate (2).

Fig. 4 (a) and (b) are schematic cross-sectional views schematically showing an example of the manufacturing process of the laminate (2).

Fig. 5 is a schematic cross-sectional view schematically showing an example of a laminate (3).

Fig. 6 (a) and (b) are schematic cross-sectional views schematically showing an example of the manufacturing process of the optical laminate (3).

Fig. 7 is a schematic cross-sectional view schematically showing an example of an optical laminate for comparison with the laminate (1).

Hereinafter, preferred embodiments of the method for manufacturing the layered product (1), the layered product (2), and the layered product (3), and the layered products (1) to (3) and the optical layered product will be described with reference to the drawings. The following embodiments and their modifications can be combined arbitrarily. In each embodiment and its modification, the same members as those described in the previous embodiment or its modification are denoted by the same symbols, and their descriptions are omitted.

[Embodiment 1 (Laminate (1) and its manufacturing method)]

(Laminate (1))

Fig. 1 is a schematic cross-sectional view schematically showing an example of a laminate (1). In the figure, W represents the width direction. As shown in FIG. 1, the laminate (1) 41 includes a first base material layer 11, a first functional layer 12, an adhesive layer 30, a second functional layer 22, and a second base material layer 21 in this order. In at least one end of the body (1) 41 in the width direction, the position of the end of the bonding layer 30 satisfies all the relationships of the following [a] to [c], [a] is the same as the position of the end of the first base material layer 11, Or at the inner side in the width direction from the end of the first base material layer 11; [b] at the outer side in the width direction from the end of the first functional layer 12; and [c] the end of the second functional layer 22 The position of the portion is the same, or is located inward in the width direction from the position of the end of the second functional layer 22.

In addition, the position of each end described in the requirements of the above [a] to [c] is the position in the widthwise cross-section of the laminate (1) 41. When the positional relationship of the end of each layer is defined below, it is also in the laminate (1) 41 Position in the cross section in the width direction.

The laminate (1) 41 may be a single film or a long film.

The first base material layer 11 has a function as a support layer or a protective layer, wherein the support layer supports the first functional layer 12 formed on the first base material layer 11, and the protective layer protects the first functional layer 12. Each of the first base material layer and the second base material layer may be a layer in which a plurality of films are laminated. The first base material layer 11 may have a film that exhibits a polarizing function.

The second base material layer 21 has a function as a support layer or a protective layer, wherein the support layer supports the second functional layer 22 formed on the second base material layer 21, and the protective layer protects the first functional layer 12.

In the present embodiment, the first base material layer 11 may be a film exhibiting releasability, and may be peeled off from the first functional layer 12 when exhibiting releasability. The second base material layer 21 may be a film exhibiting releasability, and may be peeled off from the second functional layer 22 when exhibiting releasability.

The first functional layer 12 may include an optical film or a liquid crystal layer that exhibits optical characteristics such as polarization characteristics and optical compensation functions, or a layer that constitutes a touch sensor, and may be a resin film or a liquid crystal layer.

The first functional layer 12 is preferably a liquid crystal layer containing a liquid crystal compound (hereinafter, the first functional layer 12 of the liquid crystal layer is referred to as "first liquid crystal layer"). The first liquid crystal layer may be, for example, a cured film formed by polymerizing a polymerizable liquid crystal compound. The first functional layer 12 is preferably a phase difference layer, a touch sensor layer, and a polarizing layer, and more preferably a phase difference layer.

The second functional layer 22 may include a thin film layer showing optical characteristics such as polarization characteristics and optical compensation functions, or a layer constituting a touch sensor, and may be a resin film or a liquid crystal layer. The second functional layer 22 is preferably a liquid crystal layer containing a liquid crystal compound (hereinafter, the second functional layer 22 of the liquid crystal layer is referred to as "second liquid crystal layer"). Like the first liquid crystal layer, the second liquid crystal layer may be, for example, a cured film formed by polymerizing a polymerizable liquid crystal compound. The second functional layer 22 is preferably a phase difference layer, a touch sensor layer, and a polarizing layer, and more preferably a phase difference layer.

The next layer 30 follows the second functional layer 22 and the first base material layer 11 and the first functional layer 12. In at least one end in the width direction of the layered body (1) 41, the position of the end of the subsequent layer 30 satisfies all the relationships of the above [a] to [c].

Specifically, in the cross section of the laminate (1) 41 in the width direction, the position of the end of the next layer 30 is the same as the end of the first base material layer 11 or is located inward in the width direction; The end of the functional layer 12 is located on the outer side in the width direction; it is the same as the end of the second functional layer 22 or is located on the inner side in the width direction.

At least one end in the width direction of the laminate (1) 41 shown in FIG. 1, the position of the end of the first base material layer 11 is located more outward in the width direction than the position of the end of the first functional layer 12, 2 The position of the end of the base material layer 21 is located outward in the width direction from the position of the end of the second functional layer 22. At least at one end in the width direction of the laminate (1) 41, the position of the end of the first base material layer 11 is the same as the position of the end of the second base material layer 21, and the position of the end of the first functional layer 12 is 2 The position of the end of the functional layer 22 is located inward in the width direction. The position of the end of the first base material layer 11 and the position of the end of the second base material layer 21 may be different from each other.

The second base material layer 21 can be peeled off from the second functional layer 22. As will be described later, the laminate (2) 42 can be obtained by peeling the second base material layer 21 from the laminate (1) 41 (Figure 3) .

By making at least one end in the width direction of the layered body (1) 41, the end of the adhesive layer 30 be the same as the end of the second functional layer 22, or be located on the inner side in the width direction (meet the above [ Relationship of c]), the state where the adhesive layer 30 is not adhered to the second base material layer 21 can be formed. Therefore, the second base material layer 21 can be peeled from the laminate (1) 41. In addition, at least one end of the adhesive layer 30 in the width direction, the end of the adhesive layer 30 is located at the same position as the end of the first base material layer 11 or is located on the inner side in the width direction and is located in the first functional layer 12 The end is located on the outer side in the width direction (satisfying the relationship of [a] and [b] above), whereby the following state can be formed: the region of the second functional layer 22 containing at least one end is passed through the adhesive layer 30 and then 1 Base material layer 11. Therefore, the peeling force separating the laminate (1) 41 between the adhesive layer 30 and the first base material layer 11 is greater than the peeling force separating the second functional layer 22 and the second base material layer 21. Due to the difference in the peeling force, when the second base material layer 21 is to be peeled from the laminate (1) 41, it becomes difficult to separate between the adhesive layer 30 and the first base material layer 11. Separation between the base material layer 11 and the first functional layer 12 becomes more difficult, and separation between the second base material layer 21 and the second functional layer 22 is easier. Therefore, the second base material layer 21 can be appropriately peeled from the laminate (1) 41.

On the other hand, for example, in the layered body 41p shown in FIG. 7, the position of the width-direction end of the subsequent layer 30p is the same as the position of the width-direction end of the first functional layer 12p and the second functional layer 22p, or is located When it is on the inner side (when [b] above is not satisfied), when the second base material layer 21p is to be peeled off, the laminate 41p will not separate between the second base material layer 21p and the second functional layer 22p, but will The separation between the first base material layer 11p and the first functional layer 12p causes a defect that the second base material layer 21 cannot be peeled from the laminate 41.

In the laminated body (1) 41, as described above, the position of the end of the adhesive layer 30 satisfies all the relationships of the above [a] to [c], whereby the second base material layer 21 can be easily peeled off, and the laminated body (1) can be easily removed Since 41 is separated between the second base material layer 21 and the second functional layer 22p, it is easy to obtain a laminate (2) 42 described later (FIG. 3 ).

The layered body (1) 41 shown in FIG. 1 can be set in the following manner, the peeling force being the force required for separation between specific layers. The peeling force (i) may be equal to or greater than the peeling force (ii), or may be equal to or less than the peeling force (ii). The force required at the time of separation between the twelve rooms. The peeling force (ii) is the force required to separate the laminate (1) 41 between the second base material layer 21 and the second functional layer 22. The peeling force (iii) is preferably greater than the peeling force (i) and the peeling force (ii), the peeling force (iii) is when separating the laminate (1) 41 between the adhesive layer 30 and the first base material layer 11 Required force. The peel force can be measured using, for example, a precision universal testing machine AGS series (manufactured by Shimadzu Corporation).

(Manufacturing method of laminate (1))

Fig. 2 (a) and (b) are schematic cross-sectional views schematically showing an example of the manufacturing process of the laminate (1) 41. In the figure, W represents the width direction. The manufacturing method of the laminate (1) includes the following steps: the step of preparing the first build-up part 10 containing the first base material layer 11 and the first functional layer 12 (Figure 2 (a)); the preparation containing the second base material The steps of the second build-up section 20 of the layer 21 and the second functional layer 22 (FIG. 2(b) ); and the first functional layer 12 and the second functional layer 22 are stacked so as to face each other via the bonding layer 30 Steps of the first build-up unit 10 and the second build-up unit 20 (Figure 1).

As shown in FIG. 2( a ), the first build-up portion 10 only needs to have the first functional layer 12 on the first base material layer 11.

When the first functional layer 12 is a resin film, the first base layer 11 and the first functional layer 12 can be peelably bonded using an adhesive or an adhesive to prepare the first build-up portion 10.

When the first functional layer 12 is the first liquid crystal layer, a composition for forming a liquid crystal layer containing a polymerizable liquid crystal compound may be applied on the first base material layer 11 and the polymerizable liquid crystal may be applied on the first base material layer 11 The compound is polymerized to form the first functional layer 12, thereby preparing the first build-up portion 10.

As exemplified in JP2017-083843A1, the first functional layer 12 can be formed by forming a composition for forming a liquid crystal layer containing a dichroic dye, and the first functional layer can be used as a polarizing layer.

Also, as exemplified in Korean Patent 10-1586736, a touch sensor layer can be formed as the second functional layer.

As shown in FIG. 2( b ), the second build-up portion 20 only needs to have the second functional layer 22 on the second base material layer 21.

When the second functional layer 22 is a resin film, the second base material layer 21 and the second functional layer 22 may be peelably bonded using an adhesive or an adhesive to prepare the second build-up portion 20.

When the second functional layer 22 is the first liquid crystal layer, a composition for forming a liquid crystal layer containing a polymerizable liquid crystal compound may be applied on the second base material layer 21, and the polymerizable liquid crystal may be applied on the second base material layer 21 The compound is polymerized to form the second functional layer 22, thereby preparing the first build-up portion 10.

As exemplified in JP2017-083843, the second functional layer 22 can be formed by using a composition for forming a liquid crystal layer containing a dichroic dye, and the second functional layer can be used as a polarizing layer.

Also, as exemplified in Korean Patent 10-1586736, a touch sensor layer can be formed as the second functional layer.

The step of stacking the first build-up section 10 and the second build-up section 20 may include the following steps: formed on at least one of the first functional layer 12 side of the first build-up section 10 and the second functional layer 22 side of the second build-up section 20 Next is the composition layer, which is used to form the adhesion layer 30. The step of stacking the first stacking unit 10 and the second stacking unit 20 may include the following steps: the first stacking unit 10 and the second stacking layer are stacked so that the first functional layer 12 and the second functional layer 22 face each other through the composition layer The build-up portion 20 forms the adhesive layer 30 from the adhesive composition layer. The step of forming the bonding layer 30 from the bonding composition layer can be suitably performed according to the components contained in the bonding composition layer. For example, when the bonding composition layer needs to be hardened, the step of hardening treatment can be performed. The composition layer directly serves as an adhesive layer.

When the step of forming the next composition layer in the first build-up portion 10 is provided, the next composition layer is preferably formed in the following manner: at least one end of the width direction of the next composition layer is located closer to the end of the first functional layer 12 Is located on the outer side in the width direction, and is at the same position as the end portion of the first base material layer 11 or on the inner side in the width direction. When the step of forming a second composition layer on the second layered portion 20 is provided, when the first layered portion 10 and the second layered portion 20 are laminated, the layered composition layer is preferably formed in the following manner: the width of the layered composition layer The position of at least one end portion is the same as the position of the end portion of the second functional layer 22, or is located inward in the width direction.

The first layered part 10 and the second layered part 20 used in the manufacturing method of the layered product (1) 41 may be a single film-like object or a long film-like object.

The laminated body (1) and its manufacturing method can be modified into the modifications shown below. In addition, the above embodiment and the modifications shown below can be arbitrarily combined.

(Modification 1 of Embodiment 1)

The position of the end of the width direction of the adhesive layer 30 at one end in the width direction of the layered body (1) may satisfy all the relationships of the above [a] to [c], or two of the width direction of the layered body (1) The position of the widthwise end of the adhesive layer 30 in the end satisfies all the relationships of the above [a] to [c].

(Modification 2 of Embodiment 1)

The laminate (1) 41 may further contain other layers in addition to the first base material layer 11, the first functional layer 12, the adhesive layer 30, the second functional layer 22, and the second base material layer 21. For example, the laminate (1) 41 may further have an adhesive layer and a release film on the surface opposite to the first functional layer of the first base material layer.

For example, when the first functional layer 12 is the first liquid crystal layer, a first alignment layer may be further provided between the first base layer 11 and the first functional layer 12. When the second functional layer 22 is a second liquid crystal layer, a second alignment layer may be further provided between the second base material layer 21 and the second functional layer 22. When the first functional layer 12 is the first liquid crystal layer and the second functional layer 22 is the second liquid crystal layer, in the method of manufacturing the layered product (1), the first layered portion may be formed between the first base material layer 11 and the first There is a first alignment layer between the functional layers 12, and the second build-up portion may have a second alignment layer between the second base material layer 21 and the second functional layer 22.

When there is a first alignment layer between the first base material layer 11 and the first functional layer 12, at least one end in the width direction of the laminate (1) 41, the position of the end of the first alignment layer can be different from that of the first base material The end of the layer 11 is the same or is located inward in the width direction, or may be the same position as the end of the first functional layer 12, or may be located inward or outward in the width direction.

When there is a second alignment layer between the second base material layer 21 and the second functional layer 22, the position of the end of the second alignment layer may be different from that of the second base material in at least one end in the width direction of the laminate (1) 41 The end of the layer 21 is the same or is located inward in the width direction, or may be the same position as the end of the second functional layer 22, or may be located inward or outward in the width direction.

[Embodiment 2 (Laminate (2) and its manufacturing method)]

(Laminate (2))

FIG. 3 is a schematic cross-sectional view schematically showing an example of a laminate (2). In the figure, W represents the width direction. As shown in FIG. 3, the laminate (2) 42 sequentially includes the first base material layer 11, the first functional layer 12, the adhesive layer 30, and the second'functional layer 22'. The laminate (2) 42 At least one end in the width direction, the position of the end of the next layer 30 satisfies all the relationships of the following [a], [b], and [d], [a] is the same as the position of the end of the first base material layer 11, or Located at the inner side in the width direction relative to it; [b] Located at the outer side in the width direction relative to the end portion of the first functional layer 12, [d] The same position as the end of the second functional layer 22'.

In addition, the position of each end described in the requirements of [a], [b], and [d] is the position in the widthwise cross-section of the laminate (2) 42, and the relationship between the positions of the ends of each layer is as follows: It is also the position in the width direction cross-section of the laminate (2) 42.

The laminate (2) 42 may be a single film or a long film.

The first base material layer 11 and the first functional layer 12 are the same as those described in the previous embodiment.

The second'functional layer 22' may include an optical film showing optical characteristics such as polarization characteristics or optical compensation functions, or a liquid crystal layer, a layer constituting a touch sensor, etc. It may be a resin film or a liquid crystal layer.

The second'functional layer 22' is preferably a liquid crystal layer containing a liquid crystal compound (hereinafter, the second'functional layer 22' belonging to the liquid crystal layer is referred to as a "second' liquid crystal layer"). The second'functional layer 22' may be, for example, a cured film formed by polymerizing a polymerizable liquid crystal compound. As described later, the second'functional layer 22' may be a layer derived from the second functional layer 22. The second 2'functional layer 22' is more preferably a phase difference layer.

As in the previous embodiment, the first base material layer 11 may be a film that can be peeled off from the first functional layer 12 or may have a film that exhibits a polarizing function.

The next layer 30 follows the second'functional layer 22' and the first base material layer 11 and the first functional layer 12. At least one end in the width direction of the laminate (2) 42, the position of the end of the following layer 30 satisfies all the relationships of the above [a], [b], and [d]. Specifically, in the cross section of the laminate (2) 42 in the width direction, the position of the end of the adhesive layer 30 is the same as the position of the end of the first base material layer 11 or is located further inward in the width direction than the first function The end of the layer 12 is located on the outer side in the width direction, and is located at the end of the second functional layer 22'.

In at least one end in the width direction of the laminate (2) 42 shown in FIG. 3, the position of the end of the first base material layer 11 is outside the position of the end of the first functional layer 12 in the width direction and is more than the second The position of the end of the'functional layer 22' is closer to the outer side in the width direction. In addition, at least one end in the width direction of the laminate (2) 42, the end of the first functional layer 12 is positioned inward in the width direction from the position of the end of the second'functional layer 22'.

As will be described later, the laminate (2) 42 can be obtained by peeling the second base material layer 21 from the laminate (1) 41. The laminate (2) 42 can be used to manufacture a laminate (3) described later.

(Manufacturing method of laminate (2))

Figures 4 (a) and (b) are schematic cross-sectional views schematically showing an example of the manufacturing process of the laminate (2). In the figure, W represents the width direction. The laminate (1) 41 shown in FIG. 4 (a) has the same structure as the laminate (1) 41 shown in FIG. 1, and the laminate (2) 42 shown in FIG. 4 (b) has the same structure as the first The laminated body (2) 42 shown in FIG. 3 has the same structure. The manufacturing method of the laminate (2) includes the following steps: the step of preparing the laminate (1) 41 (FIG. 4 (a)); and the step of peeling the second base material layer 21 from the laminate (1) 41 (No. 4) Figure (b)).

The laminate (1) can be prepared by the method described in the previous embodiment. The laminate (1) is as described in the previous embodiment.

In the laminate (1) 41, the second base material layer 21 is peelable from the second functional layer 22, and the position of the end of the adhesive layer 30 in at least one end in the width direction of the laminate (1) 41 satisfies the above [ all relations from a] to [c]. Therefore, by peeling the second base material layer 21 from the laminate (1) 41, the laminate (2) 42 shown in FIGS. 3 and 4 (b) can be obtained.

In the widthwise cross-section of the laminate (1) 41 shown in FIG. 4(a), the second functional layer 22 has: an adhesive layer formation region 22x where the adhesive layer 30 is provided, and an adhesive layer 30 where the adhesive layer 30 is not provided The region 22y is not formed in the layer next to the region (the part indicated by the diagonal line in the upper right in FIG. 4(a)). The subsequent layer formation region 22x is a region provided on the adhesive layer 30. Therefore, even if the second base material layer 21 is peeled off, it is fixed to the adhesive layer 30, and it is not easy to be peeled together with the second base material layer 21. On the other hand, the adhesive layer non-formed region 22y is not fixed to the adhesive layer 30 and is easily peeled together with the second base material layer 21. Therefore, when the second base material layer 21 is peeled off from the laminate (1) 41, as shown in FIG. 4(b), the adhesion layer forming region 22x exists on the adhesion layer 30 and the adhesion layer non-forming region 22y exists. The second functional layer 22 is divided so as to be on the second base material layer 21, and the adhesive layer forming region 22x existing on the adhesive layer 30 becomes the second'functional layer 22'. Therefore, the laminated body (2) 42 can be obtained by peeling the second base material layer 21 from the laminated body (1) 41.

The laminate (1) 41 used in the manufacturing method of the laminate (2) 42 may be a single film or a long film.

The laminated body (2) and its manufacturing method can be modified into the modifications shown below. The above embodiment and the modifications shown below can be combined arbitrarily.

(Modification 1 of Embodiment 2)

The position of the end of the next layer 30 may be such that all the relationships of the above [a], [b], and [d] are satisfied at one end in the width direction of the layered body (2) 42, or it may be in the width direction of the layered body (2) 42 Both ends of the above satisfy all the relations of [a], [b] and [d] above.

(Modification 2 of Embodiment 2)

The laminate (2) 42 may further contain other layers in addition to the first base material layer 11, the first functional layer 12, the adhesive layer 30, and the second'functional layer 22'. The laminate (2) 42 may further have an adhesive layer and a separator on the side opposite to the first functional layer 12 of the first base material layer 11.

When the first functional layer 12 is the first liquid crystal layer, a first alignment layer may be further provided between the first base layer 11 and the first functional layer 12. When the second' functional layer 22' is the second' liquid crystal layer, it may further have a second alignment layer on the side opposite to the adhesive layer 30 of the second'functional layer 22'.

When the laminate (2) 42 has the first alignment layer between the first base material layer and the first functional layer, the position of the end of the first alignment layer may be at least one end of the laminate (2) 42 in the width direction The end of the first base material layer may be the same or located inward in the width direction, or may be the same as the width end of the first functional layer, or may be located inward or outward in the width direction.

When the laminated body (2) 42 has the second alignment layer, the position of the end of the second alignment layer may be the same as that of the end of the second functional layer in at least one end in the width direction of the laminated body (2) 42 Located on the inner side in the width direction.

When the laminate (2) is obtained by peeling the second base material layer from the laminate (1), the laminate (1) may have the first alignment layer or the second alignment layer. When the laminate (1) has the second alignment layer between the second base material layer and the second functional layer, the laminate (2) can be obtained by peeling the second alignment layer together with the second base material layer. 2 The second base material layer is peeled off so that the alignment layer exists on the 2'functional layer. At this time, similar to the second functional layer, the second alignment layer in the laminate (1) can be divided into a region present on the second substrate layer and a second 2′ layer when the second substrate layer is peeled off The area on the functional layer.

The second base material layer and the second base material layer can be adjusted by the peeling force between the second base material layer, the second alignment layer, and the second functional layer. The alignment layer or only the second base material layer is peeled off. The peeling force can be adjusted by, for example, the components contained in each layer or the surface treatment performed on the surface of each layer. For example, by the type or amount of additives contained in the second alignment layer or the second functional layer, or on the side surface of the second alignment layer of the second substrate layer or the second alignment layer provided on the second substrate layer The surface is subjected to surface treatments such as corona treatment, plasma treatment, and flame treatment to adjust the peeling force between the second alignment layer and the second base material layer or the second functional layer.

[Embodiment 3 (Laminate (3) and its manufacturing method)]

(Laminate (3))

Fig. 5 is a schematic cross-sectional view showing an example of a laminate (3). In the figure, W represents the width direction. As shown in FIG. 5, the layered body (3) 51 of this embodiment includes a layered body (2) 42 (that is, the first base material layer 11, the first functional layer 12, the adhesive layer 30, and the second' functional layer 22'), and the optical film 60 (resin film), and the optical film 60 is laminated on the 2nd' functional layer 22' side of the laminate (2) 42 via an adhesive layer 36 for optical film (adhesive layer for resin film) .

The laminate (3) 51 may be a single film or a long film.

As shown in FIG. 5, the laminate (3) 51 sequentially includes a first base material layer 11, a first functional layer 12, an adhesive layer 30, a second'functional layer 22', an optical film adhesive layer 36, and optical膜60。 60 film. As described in the previous embodiment, the laminate (2) 42 includes the first base material layer 11, the first functional layer 12, the adhesive layer 30, and the second'functional layer 22' in this order.

The optical film 60 may have a polarizing layer or a phase difference layer. At least one end in the width direction of the laminate (3) 51, the position of the end of the optical film 60 may be the same as the position of the end of the second'functional layer 22' or the end of the adhesive layer 30, or may be Or, the position of the end of the first functional layer may be the same, or the position of the end of the first base material layer 11 may be the same, or may be different.

In addition, the position of each end portion of each layer forming the layered body (3) 51 is the position in the width direction cross-section of the layered body (3) 51.

The adhesive layer 36 for an optical film connects the optical film 60 and the 2nd' functional layer 22'. In at least one end in the width direction of the layered body (3) 51 shown in FIG. 5, the position of the end of the adhesive layer 36 for the optical film needs to be the same as the first base material layer 11 or located inward in the width direction can. In particular, the position of the end of the adhesive layer 36 for the optical film is the same as the end of the optical film 60 or is located inward in the width direction, and is the same as the end of the outermost layer in the width direction of the laminate (2) 42 or Located on the inner side in the width direction, the optical film adhesive layer 36 can suppress the optical film adhesive layer 36 from seeping from the laminate (3) and contaminating the conveyance path, etc., which is preferable.

In at least one end in the width direction of the layered body (3) 51 shown in FIG. 5, the position of the end of the adhesive layer 36 for the optical film is the same as the end of the first functional layer 12 or is located inward in the width direction Office.

The layered body (3) 51 can be used to obtain an optical layered body 52 as described later (FIG. 6(b)). For example, the first base material layer 11 can be peeled off from the laminate (3) 51, whereby the optical laminate 52 can be obtained.

Although the details will be described later, by peeling off the first base material layer 11, the intermediate layer 45 (including the second'functional layer 22', the adhesive layer 30, and the second layer between the first base material layer 11 and the adhesive layer 36 for optical film 1 The layer of the functional layer 12) can be divided into a region outside the width direction of the end of the adhesive layer 36 for the optical film (hereinafter referred to as "outside region") and a region inside the width direction (hereinafter referred to as "inside region") ) (Figure 6 (a), (b)).

As described above, in the laminate (3) 51, when the position of the end of the adhesive layer 36 for the optical film is the same as the position of the end of the first functional layer 12, or is located inward in the width direction, by peeling the first substrate In the intermediate layer 45 divided by the material layer 11, the outer region has a region where the adhesive layer 30 is adhered to the first base material layer 11, and the inner region becomes the presence of the first functional layer 12 or a part thereof on the first base material layer 11 Area (Figure 6, (a), (b)).

As explained in the previous embodiment, the first base material layer 11 can be peeled off from the first functional layer 12, so in the outer area, the first base material layer 11 and the adhesive layer 30 are less likely to separate, and in the inner area, The first base material layer 11 and the first functional layer 12 are easily separated. Therefore, when the first base material layer 11 is peeled off from the laminate (3) 51, the intermediate layer 45 is divided so that the outer area exists on the first base material layer 11 and the inner area exists on the adhesive layer 36 for the optical film. The first base material layer and the first functional layer can be separated in the inner region. Therefore, the optical laminate 52 can be obtained by peeling the first base material layer 11 from the laminate (3) 51 (FIG. 6(b)).

(Manufacturing method of laminate (3))

The manufacturing method of the layered body (3) 51 (Figure 5) is provided with the following steps: the step of preparing the layered body (2) 42 (Figure 3 or Figure 4 (b)); and the layered body (2) 42 The step of laminating the optical film 60 (resin film) via the adhesive layer 36 for optical film (adhesive layer for resin film) on the second'functional layer 22' side (FIG. 5 ).

As shown in FIG. 3 or FIG. 4 (b), the laminate (2) can be prepared by the manufacturing method described in the previous embodiment. The laminate (2) 42 is as described in the previous embodiment. The optical film 60 and the adhesive layer 36 for optical film are as described above.

For example, an adhesive film layer for an optical film is formed on at least one of the second'functional layer 22' side of the laminate (2) 42 and the optical film 60, and the optical film 60 and the second'functional layer 22' are bonded together. Thereby, the optical film 60 can be laminated, and the adhesive layer for the optical film is used to form the adhesive layer 36 for the optical film. The method of forming the optical film adhesive layer 36 from the optical film adhesive composition layer can be suitably performed according to the components contained in the optical film adhesive composition layer. For example, when the optical film adhesive composition layer needs to be hardened, a curing treatment can be performed In this step, when no hardening treatment is required, the adhesive composition layer for the optical film can be directly used as the adhesive layer for the optical film.

In the laminate (3) 51 shown in FIG. 5, when the position of the end of the adhesive layer 36 for the optical film is the same as the position of the end of the first functional layer 12, or is located inward in the width direction, it is preferable to The position of the end portion of the adhesive composition layer for the optical film is the same as the position of the end portion of the first functional layer 12 in the width direction, or it is arranged inward of the width direction. For example, when there is a step of forming the adhesive composition layer for the optical film on the second'functional layer 22' side of the laminate (2) 42, the position of the end of the adhesive composition layer for the optical film can be adjusted to the width of the first functional layer 12 The positions of the end portions in the direction are the same, or formed so as to be closer to the inner side in the width direction. In addition, when there is a step of forming an adhesive layer for an optical film on the optical film 60, when the optical film 60 and the layered body (2) 42 are laminated via the adhesive layer for an optical film, it is preferable that the optical film It is formed so that the position of the width-direction end of the composition layer is the same as the position of the width-direction end of the first functional layer 12, or is located inward of the width direction.

The laminate (2) 42 used in the manufacturing method of the laminate (3) 51 may be a single film or a long film. Furthermore, the optical film may be a single film-like object or a long film-like object.

The laminated body (3) and its manufacturing method can be modified into the modifications shown below. In addition, the above embodiment and the modifications shown below can be arbitrarily combined.

Furthermore, the laminate (3) may further have a layer on the opposite side to the adhesive composition layer for the optical film 60 of the optical film 60, for example, may sequentially have an adhesive layer on the opposite side to the adhesive composition layer for the optical film 60 of the optical film 60 And release film.

(Modification 1 of Embodiment 3)

At least one end in the width direction of the layered body (3) 51, the position of the width direction end of the adhesive layer for the optical film may be located outside the width direction of the position of the width direction end of the first functional layer. At this time, even if the first base material layer is peeled off from the laminate (3) 51, in the inner region of the intermediate layer 45 (in the widthwise cross-section of the laminate (3) 51, the inner side of the end portion of the adhesive layer for the optical film Area) is also included in the area where the first base material layer is followed by an adhesive layer, so the first base material layer and the first functional layer are not easily separated. When the widthwise end of the adhesive layer for the optical film is located outside the widthwise end of the first functional layer in the widthwise direction, it can be located at the widthwise end of the first functional layer 12 or inward of the widthwise direction In the position of, the first base material layer 11 is peeled from the laminate (3) 51 by removing the end of the laminate (3) 51.

(Modification 2 of Embodiment 3)

In the laminate (3) 51, for example, a peeling film (resin film) may be used in place of the optical film, or an adhesive layer for a laminate (adhesive layer for resin film) may be used in place of the optical film adhesive layer 36, or a polarizing plate may be used. The optical film replaces and forms the first base material layer 11 of the laminate (3) 51.

The adhesive layer system for a laminated body can be used for bonding the laminated body (3) to an optical display element by peeling a peeling mold at an appropriate timing, for example.

(Modification 3 of Embodiment 3)

In the laminate (3) 51, when the first functional layer 12 is the first liquid crystal layer and the second'functional layer 22' is the second' liquid crystal layer, for example, it may further have between the first base material layer 11 and the first functional layer The first alignment layer may further have a second alignment layer between the second'functional layer 22' and the adhesive layer 36 for the optical film.

When the laminate (3) 51 has the first alignment layer, at least one end in the width direction of the laminate (3), the position of the end of the first alignment layer may be the same as the end of the first base material layer The inner side in the width direction may be the same as the end of the first functional layer, or may be closer to the inner side in the width direction or the outer side in the width direction. When the laminate (3) 51 has the second alignment layer, the position of the end of the second alignment layer may be the same as the position of the second'functional layer 22' and the end, or it may be positioned inward in the width direction.

When the layered body (3) has the second alignment layer, the layered body (2) having the second alignment layer and the optical film are prepared, and the adhesive layer 36 for the optical film is interposed on the side of the second alignment layer of the layered body (2) The optical film can be laminated.

[Embodiment 4 (manufacturing method of optical laminate)]

Fig. 6 is a schematic cross-sectional view schematically showing an example of the manufacturing process of the optical laminate. In the figure, W represents the width direction.

The laminate (3) 51 shown in FIG. 6(a) has the same structure as the laminate (3) 51 shown in FIG. 5. The manufacturing method of the optical layered body 52 includes the following steps: the step of preparing the layered body (3) 51 (Figure 6 (a)); and the step of peeling the first base material layer 11 from the layered body (3) 51 (Figure 6) (b)).

As shown in FIG. 6(b), the optical laminate 52 sequentially includes a first'functional layer 12', an adhesive layer 30', a second "functional layer 22", an adhesive layer 36 for optical film, and an optical film 60 . As described in the previous embodiment, the laminate (3) 51 sequentially includes the first functional layer 12, the adhesive layer 30, the second'functional layer 22', the optical film adhesive layer 36, and the optical film 60.

The optical layered body 52 is at least one end in the width direction, for example, as shown in FIG. 6(b), the first'functional layer 12', the adhesive layer 30', the second "functional layer 22", and the optical film Then the individual ends of the layer 36 are at the same position. The optical laminate 52 shown in FIG. 6(b) shows the case where the end of the optical film 60 is positioned outward in the width direction from the end of the adhesive layer 36 for the optical film, but it may be the inner side in the width direction or may be in contact with the optical film The positions of the ends of the adhesive layer 36 are the same.

In addition, the position of each end portion of each layer forming the optical laminate 52 is a position in a cross section of the optical laminate 52 in the width direction.

The first'functional layer 12', the adhesive layer 30', and the second "functional layer 22" contained in the optical laminate 52 are derived from the first functional layer 12, the adhesive layer 30 contained in the laminate (3) 51, And the second 2'functional layer 22'.

In the method of manufacturing the optical layered body 52, the layered body (3) 51 is as described in the previous embodiment.

As described in the previous embodiment, at least one end of the layered body (3) 51 in the width direction, the end of the adhesive layer 36 for the optical film is located at the same position as the end of the first functional layer 12 or is positioned closer to the width Direction inside.

In the laminate (3) 51 shown in FIG. 6(a), the first base material layer 11 can be peeled off from the first functional layer 12, but the position of the end of the adhesive layer 30 is located closer to the end of the first functional layer 12 Is located outside in the width direction. Therefore, in the laminate (3) 51 shown in FIG. 6(a), in the area where the adhesive layer 30 outside the end of the first functional layer 12 exists, the first base material layer 11 and the adhesive layer 30 are not easily separated, but Inside the end of the first functional layer, the first base layer 11 and the first functional layer 12 are easily separated.

As described above, in the laminate (3) 51 shown in FIG. 6(a), the end of the adhesive layer 36 for the optical film is located at the same position as the end of the first functional layer 12 or is located inward in the width direction Office. Therefore, if the first base material layer 11 is to be peeled from the laminate (3) 51, as shown in FIGS. 6 (a) and (b), the second'functional layer 22' will be provided on the adhesive layer 36 for the optical film The area is divided between the non-provided area. In the cross-section of the laminate (3) 51 in the width direction, the adhesive layer 30 on the side of the first base material layer 11 of the second'functional layer 22' is also divided into adhesives for optical films. The end of the layer 36 is located on the outer side and the inner side. In the cross section of the laminate (3) 51 in the width direction, the end of the first functional layer 12 is divided into relatively narrower parts when the end of the first functional layer 12 is positioned inward in the width direction than the end of the adhesive layer 36 for the optical film. The portion of the outer layer and the inner part of the end of the adhesive layer 36 for the optical film are located at the end of the first functional layer 12 and the end of the adhesive layer 36 for the optical film in the widthwise section of the laminate (3) 51 If the positions are the same, the boundary between the first functional layer 12 and the next layer 30 in the width direction will be divided.

As described above, if the first base material layer 11 is peeled off from the laminate (3) 51 shown in FIG. 6(a), the intermediate layer 45 will be divided to the outer side in the width direction from the end of the adhesive layer 36 for optical film Area (the portion shown by the lower right diagonal line in FIGS. 6(a) and (b)), and the inner area on the inner side in the width direction, the intermediate layer 45 contains the adhesive layer for the first base material layer 11 and the optical film The 36' second functional layer 22', the next layer 30, and the first functional layer 12. The outer area has an area where the first base material layer 11 is followed by an adhesive layer 30. The inner area is an area where the first functional layer 12 or a part of it exists on the first base material layer 11. Therefore, in the outer area, the first base material The separation between the layer 11 and the adhesion layer 30 is not easy, but in the inner region, the first base layer 11 can be peeled off from the first functional layer 12, so the first base layer 11 and the first functional layer 12 are easily separated. Therefore, if the first base material layer 11 is peeled off from the laminate (3) 51, as shown in FIG. 6(b), there is an outer area on the first base material layer 11 and an inner side on the adhesive layer 36 for optical film The intermediate layer 45 is divided into regions, and the first base material layer and the first functional layer can be separated in the inner region. As a result, the optical laminate 52 having the same positions of the respective ends of the first functional layer 12', the adhesive layer 30', the second "functional layer 22", and the adhesive layer 36 for the optical film can be obtained.

The manufacturing method of the optical layered body 52 may further include the step of providing a layer for the layered body on the side opposite to the layer 30' of the first'functional layer 12' of the optical layered body 52. The adhesive layer for the laminate can be used to bond the optical laminate to the optical display device.

The layered body (3) 51 used in the method for manufacturing the optical layered body 52 may be a single film or a long film.

In the optical laminate 52, the optical film 60 is used as a linear polarizing plate, the second "functional layer 22" is used as a 1/2-wavelength plate, and the first functional layer 12' is used as a 1/4-wavelength plate. The laminate 52 becomes a circular polarizing plate. The optical film 60 is used as a linear polarizing plate, the second "functional layer 22" is used as a 1/4 wavelength plate with reverse wavelength dispersion, and the first'functional layer 12' is used as a positive-C plate, thereby enabling the optical laminate 52 becomes a circular polarizing plate.

The optical layered body 52 and its manufacturing method can be modified into the following modified examples. The above embodiment and the modifications shown below can be combined arbitrarily.

(Modification 1 of Embodiment 4)

The optical laminate 52 may further contain other layers in addition to the first'functional layer 12', the adhesive layer 30', the second "functional layer 22", the adhesive layer 36 for optical films, and the optical film 60. In the optical laminate 52, when the first'functional layer 12' is the first'liquid crystal layer and the second "functional layer 22" is the second "liquid crystal layer, for example, the first functional layer 12' and the adhesive layer 30 The opposite side has a first alignment layer, and may have a second alignment layer between the second "functional layer 22" and the adhesive layer 36 for the optical film.

When the optical laminate has the first alignment layer, at least one end of the optical laminate in the width direction, the position of the end of the first alignment layer may be the same as the end of the first'functional layer 12', or may be On the inside in the width direction. When the optical layered body has the first alignment layer, the layered body (3) used to manufacture the optical layered body has the first alignment layer.

When the laminate (3) has the first alignment layer between the first substrate layer and the first functional layer, the first alignment layer can be peeled together with the first substrate layer to obtain the optical laminate shown in FIG. 6(b) 52. The first base material layer may be peeled off so that the first alignment layer exists on the first'functional layer 12'. At this time, as in the case of the intermediate layer 45, when the first base material layer is peeled off, the first alignment layer in the laminate (3) can be divided into a region outside the width direction end of the optical film adhesive layer 36 in the width direction , And the area on the inner side in the width direction.

When the optical laminate has a second alignment layer, at least one end of the optical laminate in the width direction, the position of the end of the second alignment layer may be the same as the end of the second "functional layer 12", or may be located closer to the end At the inner side in the width direction. When the optical laminate has a second alignment layer, the laminate (3) used to manufacture the optical laminate has a second alignment layer.

(Modification 2 of Embodiment 4)

In the manufacturing method of the optical layered body 52, a peeling film and an adhesive layer for a laminated body can be used instead of the optical film and the adhesive layer for an optical film, thereby manufacturing a laminated body containing a peeling film. The method for manufacturing an optical laminate may include the step of providing an optical film via an adhesive layer for an optical film on the opposite side to the adhesive layer of the second' functional layer.

The embodiments and modified examples of the present invention have been described above, but the present invention is not limited to these embodiments and modified examples. For example, the structures and steps of the above-described embodiments and modified examples can be combined and implemented. The following is a detailed description of items common to all embodiments and modifications.

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

The first base material layer and the second base material layer (hereinafter both are collectively referred to as "base material layer") are preferably films formed of a resin material. For the resin material, for example, a resin material excellent in transparency, mechanical strength, thermal stability, and extensibility is used. Specific examples include polyolefin resins such as polyethylene and polypropylene; cyclic polyolefin resins such as norbornene polymers; and polymers such as polyethylene terephthalate and polyethylene naphthalate. Ester resins; (meth)acrylic resins such as (meth)acrylic acid and polymethyl (meth)acrylate; cellulose ester resins such as cellulose triacetate, cellulose diacetate and cellulose acetate propionate; Vinyl alcohol-based resins such as vinyl alcohol and polyvinyl acetate; polycarbonate-based resins; polystyrene-based resins; polyarylate-based resins; poly-base resins; polyether-base resins; polyamide resins; poly-amide Imine resin; polyether ketone resin; polyphenylene sulfide resin; polyphenylene ether resin, and mixtures and copolymers thereof. Among these resins, any one or a mixture of cyclic polyolefin resin, polyester resin, cellulose ester resin, and (meth)acrylic resin is preferably used. In addition, the "(meth)acrylic acid" means "at least one of acrylic acid and methacrylic acid".

The base material layer may be a film showing mold releasability or a film having a polarizing function. The base material layer may be a resin film that can be used as a flexible front panel.

<front panel>

The role of the front panel is to suppress warpage of image display elements such as liquid crystal cells and to protect image display elements, and is, for example, a light-transmissive (preferably optically transparent) plate-shaped body. The front panel can be a single-layer structure or a multi-layer structure.

The front panel is arranged on the outermost surface of the final product containing the polarizing plate of the present invention, so it is required to show sufficient durability even when used outdoors or semi-outdoor. From such a viewpoint, the front panel is preferably composed of an inorganic material such as glass or strengthened glass, and a polymer film having a Young's modulus of 2 GPa or more. It can be inorganic materials such as glass or strengthened glass, especially for flexible display applications, preferably resin films, and more preferably polyimide films, polyimide amide imide films or polyimide films, polyester Film, olefin film, acrylic film, cellulose film. In the polymer film, inorganic particles such as silicon dioxide, organic fine particles, rubber particles, etc. are preferably dispersed.

The flexible front panel composed of the resin film may have a hard coating layer on at least one side. The hard coat layer can be provided on the surface of the resin film by a known method.

The base material layer may be a single layer of one type of resin or a mixture of two or more types, or a multilayer structure of two or more layers. When having a multi-layer structure, the resins forming each layer may be the same or different from each other. When the base material layer is a film formed of a resin material, any additives may be added to the base material layer. Additives include ultraviolet absorbers, antioxidants, slip agents, plasticizers, mold release agents, anti-staining agents, flame retardants, nucleating agents, antistatic agents, pigments, and coloring agents.

The thickness of the base material layer is not particularly limited, but in general, from the viewpoint of operability such as strength and operability, it is preferably 1 to 300 μm, more preferably 10 to 200 μm, and still more preferably 30 to 120 μm.

(1st alignment layer and 2nd alignment layer)

The layered bodies (1) to (3) and the first alignment layer and the second alignment layer (hereinafter referred to as the "alignment layer") that the optical layered body may contain have alignment regulatory force, and the alignment regulatory force The polymerizable liquid crystal compound contained in the liquid crystal layer formed thereon performs liquid crystal alignment in the desired direction. Examples of the alignment layer include an alignment polymer layer formed of an alignment polymer, a photo alignment polymer layer formed of an optical alignment polymer, and a groove alignment layer having an uneven pattern or a plurality of grooves on the surface of the layer . The thickness of the alignment layer is usually 10 to 500 nm, preferably 10 to 200 nm.

The alignment polymer layer can be formed by applying the composition in which the alignment polymer is dissolved in the solvent to the substrate layer, removing the solvent, and performing brushing treatment as necessary. At this time, in the alignment polymer layer formed by the alignment polymer, the alignment regulation force can be arbitrarily adjusted by the surface state of the alignment polymer or the brushing conditions.

The photo-alignable polymer layer can be formed by applying a composition containing a polymer or monomer having a photo-reactive group and a solvent to the substrate layer and irradiating polarized light. At this time, in the photo-alignment polymer layer, the alignment regulation force can be arbitrarily adjusted by the polarized light irradiation conditions for the photo-alignment polymer and the like.

The groove alignment layer can be formed by, for example, a method of forming a concavo-convex pattern on the surface of the photosensitive polyimide film through an exposure mask having a slit with a pattern shape and forming a concave-convex pattern; The plate-shaped original plate of the groove forms an uncured layer of the active energy ray-curable resin, and transfers the layer to the base material layer and hardens; forms an uncured layer of the active energy ray-curable resin on the base material layer The method of forming and hardening by pressing and crimping a roll-shaped master with unevenness and the like.

(1st functional layer and 2nd functional layer)

The first functional layer and the second functional layer (hereinafter collectively referred to as "functional layers") may include an optical film that exhibits optical characteristics such as polarization characteristics or optical compensation functions, or a liquid crystal layer, which constitutes a touch sensor The layer or the like may be a resin film or a liquid crystal layer.

Examples of the optical film in the above-mentioned functional layer include the optical film described later. The resin film is preferably a phase difference film, a polarizing layer, and a layer constituting a touch sensor, and more preferably a phase difference film.

The thickness of the resin film is usually 5 μm or more and 100 μm or less.

The functional layer is preferably a liquid crystal layer containing a liquid crystal compound. The liquid crystal layer can be formed using a known polymerizable liquid crystal compound. The type of the polymerizable liquid crystal compound is not particularly limited, and rod-shaped liquid crystal compounds, disc-shaped liquid crystal compounds, and mixtures thereof can be used. When a polymerizable liquid crystal compound is used, a polymerizable liquid crystal compound, a solvent, and a liquid crystal layer forming composition containing various additives as needed may be applied on the alignment layer, and a coating film is formed, which is formed by curing the coating film Liquid crystal layer of liquid crystal hardened layer. Alternatively, a composition for forming a liquid crystal layer may be coated on the substrate layer to form a coating film, and the coating film may be extended together with the substrate layer to form a liquid crystal layer. The liquid crystal layer may be a phase difference layer.

The composition for forming a liquid crystal layer may contain a polymerization initiator, a reactive additive, a leveling agent, a polymerization inhibitor, etc. in addition to the above-mentioned polymerizable liquid crystal compound and solvent. The polymerizable liquid crystal compound, the solvent, the polymerization initiator, the reactive additive, the leveling agent, the polymerization inhibitor, and the like can be suitably used as well-known ones.

The thickness of the liquid crystal layer is usually 0.1 μm or more and 10 μm or less.

(Optical film)

The optical film may be a polarizing layer, a polarizing plate having a protective layer formed on at least one side of the polarizing layer, a polarizing plate with a protective film having a protective film on at least a single area of the polarizing plate, a reflective film, a semi-transmissive reflective film, a brightness enhancement film, an optical The compensation film, the film with anti-glare function, the retardation film, etc. may have one of these, or may have a multilayer structure with two or more. In addition, the optical film may contain a liquid crystal layer, and the liquid crystal layer may be a phase difference layer. In this specification, the "polarizing layer" refers to a layer that has the property of transmitting linearly polarized light having a vibration plane orthogonal to the absorption axis when light without polarization is incident.

The polarizing layer that the optical film may contain may be one in which a dichroic pigment is adsorbed and aligned on a single-layer polyvinyl alcohol resin film, or the second is a polyvinyl alcohol resin layer in which a dichroic pigment is adsorbed and aligned on a base film Multilayer film. In addition, the polarizing layer may be a cured film in which a dichroic dye is aligned with the polymerizable liquid crystal compound and the polymerizable liquid crystal compound is polymerized. At this time, the polarizing layer may be a liquid crystal layer.

The liquid crystal layer that the optical film may contain is formed by polymerizing a polymerizable liquid crystal compound. On the base material layer or on the alignment layer provided on the base material layer, a composition for forming a liquid crystal layer containing a polymerizable liquid crystal compound may be coated and dried, and the polymerizable liquid crystal compound may be polymerized by irradiating active energy rays such as ultraviolet rays And hardened to form a liquid crystal layer.

<Phase difference film>

The retardation film is a film that imparts a retardation in a direction (in-plane direction of the film) orthogonal to the direction in which incident light proceeds. The aforementioned retardation film may be an extended retardation film manufactured by stretching a polymer film such as a cellulose-based film, an olefin-based film, or a polycarbonate-based film. The thickness of the aforementioned extended retardation film may be 200 μm or less, preferably 1 μm to 100 μm. If the thickness exceeds 200 μm, the flexibility will decrease.

In addition, as another example of the aforementioned retardation film, a liquid crystal coating-type retardation film formed by coating a liquid crystal composition on a polymer film may be used. The aforementioned liquid crystal composition system includes a liquid crystal compound having a property of showing a liquid crystal state such as a nematic type, a cholesteric type, and a matrix type. In the liquid crystal composition, any compound containing a liquid crystal compound has a polymerizable functional group. In the same manner as the description of the liquid crystal polarizing layer, the liquid crystal composition is coated on the alignment film and cured to form a liquid crystal retardation layer, whereby the liquid crystal coating type retardation film can be manufactured.

In addition, the aforementioned retardation film may be a single layer, or may be a multilayer, or may be a laminated extension type retardation and a liquid crystal type retardation.

<polarizing layer>

The polarizing layer may be a linear polarizing plate or a circular polarizing plate.

[Linear polarizer]

The linear polarizer may be a film-type polarizer manufactured by dyeing and stretching a polyvinyl alcohol (PVA)-based film. The dichroic dye such as iodine can be adsorbed by the PVA-based film that is stretched and aligned, or the dichroic dye can be aligned by being stretched while adsorbing the PVA state, and the polarizing performance can be exerted. When manufacturing the film-type polarizer, it may additionally have steps of swelling, crosslinking by boric acid, washing by aqueous solution, and drying. The stretching or dyeing step may be performed by a PVA-based film alone, or may be performed in a layered state with other films such as polyethylene terephthalate. The PVA-based film used is preferably 10 to 100 μm, and the stretching magnification is 2 to 10 times.

The aforementioned film-type polarizer may have a protective film described later on at least one side. When laminated with another base material and extended, the base material may be peeled off after the protective film is attached to the polarizer surface, or the base material at the time of extension may be directly used as the protective film.

In addition, as another example of the aforementioned polarizer, a liquid crystal-coated polarizer formed by coating a liquid crystal polarizing composition may be used. The liquid crystal polarizing composition may contain a liquid crystal compound and a dichroic dye compound. The liquid crystal polarizing layer is coated on the alignment film and a liquid crystal polarizing layer is formed, whereby the aforementioned liquid crystal polarizing layer can be manufactured. Compared with film polarizers, the thickness of the liquid crystal polarizing layer can be formed to be thinner. The thickness of the aforementioned liquid crystal polarizing layer may be 0.5 to 10 μm, preferably 1 to 5 μm.

For example, the composition can be formed by coating an alignment film on a substrate, and the alignment can be imparted by brushing, polarized light irradiation, etc., whereby the aforementioned alignment film can be manufactured. The liquid crystal polarizing layer can be peeled off from the substrate and transferred to be laminated, or the substrate can be directly laminated. As the base material, a polymer film exemplified by a protective film described later can be used.

As long as the protective film is a transparent polymer film, the materials and additives used for the transparent substrate can be used. Cellulose-based films, olefin-based films, acrylic-based films, and polyester-based films are preferred. It can be a coating type protective film obtained by coating and curing a cationic hardening composition such as epoxy resin or a radical hardening composition such as acrylate. May contain plasticizers, ultraviolet absorbers, infrared absorbers, colorants such as pigments or dyes, fluorescent whitening agents, dispersants, heat stabilizers, light stabilizers, antistatic agents, antioxidants, slip agents Agents, solvents, etc. The thickness of the aforementioned protective film may be 200 μm or less, preferably 1 μm to 100 μm. If the thickness exceeds 200 μm, the flexibility decreases.

[Circular polarizer]

The circular polarizing plate is a functional layer that has a function of transmitting only the right or left circular polarizing component by laminating the λ/4 retardation plate of the linear polarizing plate. For example, it is used to convert external light into right circularly polarized light, and block the light reflected from the organic EL panel to become left circularly polarized light. By only transmitting the luminous components of the organic EL, the influence of reflected light is suppressed, and the image can be made clearer. . In order to achieve the function of circular polarized light, the absorption axis of the linear polarizer and the slow axis of the λ/4 retardation plate should be theoretically 45°, but practically 45±10°. The linear polarizing plate and the λ/4 retardation plate need not necessarily be adjacent and stacked, as long as the relationship between the absorption axis and the slow axis satisfies the aforementioned range. It is preferable to achieve complete circular polarized light at all wavelengths, but this is not necessary in practice, so the circular polarizing plate in the present invention also includes a circular polarizing plate. A λ/4 retardation film is further deposited on the visual confirmation side of the linear polarizer, and the emitted light becomes circularly polarized, thereby improving the visibility of the polarized sunglasses, which is also preferable. The materials of the retardation film are generally those whose birefringence is greater at shorter wavelengths and exhibits lower birefringence at longer wavelengths. At this time, the phase difference of λ/4 cannot be achieved in the full visible light region, so it is often designed in the following way: For the vicinity of 560 nm with high visual sensitivity, the in-plane phase difference becomes 100 to 180 nm by λ/4, preferably Becomes 130 to 150nm. In general, it is preferable to use an inversely dispersed λ/4 retardation plate with a material having inverse birefringence wavelength dispersion characteristics to increase visual confirmation. When such a material is an extended phase difference plate, it is preferable to use the one described in Japanese Patent Application Laid-Open No. 2007-232873, etc. When it is a liquid crystal coating type phase difference plate, it is preferable to use the Japanese Patent Application Laid-Open No. 2010-30979 Writer.

In addition, as another method, a technique of obtaining a broadband λ/4 phase difference plate by combining a λ/2 phase difference plate is known (Japanese Patent Laid-Open No. 10-90521). The λ/2 phase difference plate can also be manufactured with the same material and method as the λ/4 phase difference plate. The combination of the extended retardation plate and the liquid crystal coating retardation plate is arbitrary, but the use of the liquid crystal coating retardation plate for both can make the film thickness thinner, which is preferable.

In the aforementioned circular polarizing plate, in order to improve the visibility in an oblique direction, a method of stacking a positive-C plate is known (Japanese Patent Laid-Open No. 2014-224837). The positive-C plate may be a liquid crystal coated retardation plate or an extended retardation plate. The phase difference in the thickness direction is -200 to -20 nm, preferably -140 to -40 nm.

[Touch sensor]

The touch sensor is used as an input means. The touch sensor has been proposed in various styles such as a resistive film method, a surface acoustic wave method, an infrared method, an electromagnetic induction method, and a capacitive method, which can be any method. Among them, the capacitive method is preferred. The capacitive touch sensor is divided into an active area and an inactive area located at the periphery of the active area. The active area corresponds to the area of the display screen of the display panel (display portion), which is an area for sensing user touch, and the inactive area corresponds to the area of the display device that does not display the screen (non-display portion). The touch sensor may include: a substrate having flexibility characteristics, a sensing pattern formed in the active area of the substrate, and each sensing line formed in the inactive area of the substrate and transmitting the sensing The pattern and the pad part are used to connect with the external driving circuit. The flexible substrate can use the same material as the polymer film substrate of the front panel. In addition, the substrate is peelable, so that only part of the touch sensor can be transferred to the laminate and used.

(Release film)

The release film supports the adhesive layer and has a function as a separator that can be peeled off from the adhesive layer. The release film may be a film that is subjected to a release treatment such as silicone treatment on the surface of the adhesive layer supporting the base film. The resin material for forming the base film may be the same as the resin material for forming the first base layer and the second base layer. The resin film may have a single-layer structure or a multilayer resin film having a multilayer structure of two or more layers.

(Next layer)

The subsequent layer may be formed by an adhesive, an adhesive, and a combination of these. It is usually one layer, but it may also be two or more layers. When the next layer is composed of two or more layers, each layer may be formed of the same material or different materials.

The adhesive can be formed by combining one or more of an aqueous adhesive, an active energy ray-curable adhesive, an adhesive, and the like. Examples of the water-based adhesive include polyvinyl alcohol-based resin aqueous solutions and water-based two-component urethane-based emulsion adhesives. Examples of the active energy ray-curable adhesive include adhesives hardened by irradiating active energy rays such as ultraviolet rays, adhesives containing a polymerizable compound and a photopolymerizable initiator, adhesives containing a photoreactive resin, and containing Adhesives for adhesive resins and photoreactive crosslinking agents. Examples of the polymerizable compound include photopolymerizable monomers such as photocurable epoxy monomers, photocurable acrylic monomers, and photocurable urethane monomers, or those derived from these monomers Oligomers, etc. Examples of the photopolymerization initiator include those containing active energy rays such as ultraviolet rays to generate active species, and the active species are, for example, neutral radicals, anionic radicals, and cationic radicals.

Examples of the adhesive include (meth)acrylic resin, styrene resin, polysiloxane resin, etc. as a base polymer, and a crosslinking agent such as an isocyanate compound, an epoxy compound, and an aziridine compound are added. Of the composition.

The subsequent layer is preferably formed using an active energy ray-curable adhesive, and more preferably formed using an adhesive containing an ultraviolet-curable epoxy monomer and a photo-cationic polymerization initiator.

The surface of the layer on which the adhesive layer is formed may be subjected to surface treatments such as corona treatment, plasma treatment, and flame treatment as needed.

(Adhesive layer for optical film)

The adhesive layer for an optical film can be formed by the above-mentioned adhesive agent, adhesive, and these combinations, and it is usually one layer, but may be two or more layers. When the optical film is composed of two or more layers, each layer may be formed of the same material or different materials. Examples of the adhesive and the adhesive used to form the adhesive layer for the optical film are the same as the adhesive and the adhesive used for the above-mentioned adhesive layer. The surface of the layer on which the adhesive layer for the optical film is formed may be subjected to surface treatments such as corona treatment, plasma treatment, and flame treatment as necessary.

(Adhesive layer for laminate)

The adhesive layer for a laminate can be formed by the above-mentioned adhesives, adhesives, and combinations thereof, and it is usually one layer, but it may be two or more layers. When the laminate is composed of two or more layers, each layer may be formed of the same material or different materials. Examples of the adhesive and the adhesive used to form the adhesive for the laminate include the same as the adhesive and the adhesive used for the above-mentioned adhesive layer. The surface of the layer on which the adhesive layer for the laminate is formed may be subjected to surface treatments such as corona treatment, plasma treatment, and flame treatment as necessary.

Claims (15)

A laminate comprising a first substrate layer, a first functional layer, an adhesive layer, a second functional layer, and a second substrate layer in sequence, wherein at least one end in the width direction of the laminate, the aforementioned The position of the end of the next layer satisfies all the relationships of the following [a] to [c], [a] is the same as the position of the end of the aforementioned first base material layer, or is located more than the end of the aforementioned first base material layer Is located on the inner side in the width direction; [b] is located on the outer side in the width direction from the position of the end of the first functional layer; and [c] is located at the same position as the end of the second functional layer or is located on the front side The end of the second functional layer is located inward in the width direction. The layered product according to item 1 of the patent application scope, wherein the position of the end of the following layer satisfies all the relationships of the above [a] to [c] at both ends in the width direction of the layered product. The laminate as described in item 1 or 2 of the patent application, wherein the first functional layer and the second functional layer are liquid crystal layers, respectively. The layered product according to any one of claims 1 to 3, wherein at least one of the first functional layer and the second functional layer is a phase difference layer. A laminate comprising a first base material layer, a first functional layer, an adhesive layer, and a second functional layer in sequence, wherein at least one end of the laminate in the width direction, the end of the adhesive layer The position of satisfies all the relationships of the following [a], [b] and [d], [a] is at the same position as the end of the aforementioned first base material layer, or is located at the end of the aforementioned first base material layer The position is located inward in the width direction; [b] is located outward in the width direction from the position of the end of the first functional layer; and [d] is the same as the position of the end of the second functional layer. The laminate as described in item 5 of the patent application scope, wherein the position of the end of the subsequent layer satisfies all the relationships of the above [a], [b] and [d] at both ends in the width direction of the laminate . The laminate as described in claim 5 or 6, wherein the first functional layer and the second 2'functional layer are liquid crystal layers, respectively. The laminate according to any one of claims 5 to 7, wherein at least one of the first functional layer and the second 2'functional layer is a phase difference layer. The laminate according to any one of claims 5 to 8 further includes a resin film, and the resin film is laminated on the 2nd' functional layer side with a resin film adhesive layer interposed therebetween. The laminate according to item 9 of the patent application scope, wherein at least at one end in the width direction of the laminate, the position of the end of the adhesive layer for the resin film is the same as the position of the end of the first functional layer Or, it is located inward in the width direction from the position of the end of the first functional layer. The laminate as described in item 9 or 10 of the patent application, wherein the resin film is an optical film. A method for manufacturing a layered product, wherein the layered system sequentially includes a first substrate layer, a first functional layer, an adhesive layer, a second functional layer, and a second substrate layer. The method for manufacturing the layered product includes the following steps: The step of preparing the first build-up part, the first build-up part contains the first base material layer and the first functional layer; the step of preparing the second build-up part, the second build-up part contains the second base material layer and The second functional layer; and the step of laminating the first layered portion and the second layered portion so that the first functional layer and the second functional layer face each other via the adhesive layer; the width of the layered body In at least one end of the direction, the position of the end of the adhesive layer satisfies all the relationships of the following [a] to [c], [a] is the same as the end of the first base material layer, or is located more than The position of the end of the first base material layer is inward in the width direction; [b] is located outside the width of the end of the first functional layer; [c] is located at the end of the second functional layer The position is the same, or it is located inward in the width direction from the position of the end of the second functional layer. A method for manufacturing a layered product, wherein the layered system sequentially includes a first substrate layer, a first functional layer, an adhesive layer, and a 2'functional layer, and the method for manufacturing the layered product includes the following steps: The step of the laminate according to any one of items 1 to 4; and the step of peeling the second base material layer from the laminate. A method for manufacturing a laminate, comprising the following steps: a step of preparing a laminate as described in any one of claims 5 to 8; and a resin is interposed on the side of the 2nd functional layer of the laminate The step of laminating the aforementioned resin film with an adhesive layer for the film. A method of manufacturing a laminate includes the following steps: a step of preparing a laminate as described in any one of claims 9 to 11; and a step of peeling the first substrate layer from the laminate.

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