TW202120310A - Polarizer with retardation layer, polarizer composite and optical laminate - Google Patents

Abstract

An object of the present invention is to provide a polarizer with retardation layer which has a novel polarizer, a polarizer composite and an optical laminate.

The polarizer with retardation layer has a polarizer and a retardation layer provided on at least one surface side of the polarizer. The polarizer has a polarizing region having a thickness of 15 μm or less, and a non-polarizing region surrounded by the polarizing region in a plan view. The non-polarizing region is a region in which a cured product of an active energy ray-curable resin is provided in a through hole surrounded by a polarizing region in a plan view.

Description

Polarizer with retardation layer, polarizer composite and optical laminate

The present invention relates to a polarizer with a retardation layer, a polarizer composite, and an optical laminate.

Polarizers are widely used as polarized light supply elements or polarized light detection elements in display devices such as liquid crystal display devices or organic electroluminescence (EL) display devices. Display devices with polarizers have also been extended to mobile devices such as notebook personal computers or mobile phones. Due to the requirements for diversification of display purposes, clarification of display partitions, and decoration, it is necessary to seek areas with different penetration rates. Polarizer. Especially in small and medium-sized portable terminals represented by smartphones or tablet terminals, from the viewpoint of decoration, in order to create a design that covers the entire surface without borders, sometimes the entire display surface Fit the polarizer. In this case, sometimes the polarizer may be superimposed on the area of the camera lens, the icon or logo printed under the screen, and therefore the sensitivity of the camera and the designability of the camera may deteriorate.

For example, in Patent Document 1, it is described that a part of a polarizer contained in a polarizing plate is intended to provide a low-concentration portion of a dichroic substance with a relatively low content of dichroic substance, and to correspond to the low-concentration portion of a dichroic substance. Configure the camera in a way to avoid adverse effects on the camera’s performance.

[Prior Technical Literature]

[Patent Literature]

[Patent Document 1] JP 2015-215609 A

In Patent Document 1, a chemical treatment in which a resin film containing a dichroic substance is exposed to an alkaline solution is applied to partially decolor the resin film to form a low-concentration portion of the dichroic substance. The alkaline solution used for decolorization requires time and cost because it is treated as a waste liquid. In addition, Patent Document 1 describes that when iodine is used as a dichroic substance, by bringing it into contact with an alkaline solution, the content of iodine can be reduced to form a dichroic substance low-concentration portion. However, it does not disclose a specific method of forming a low-concentration portion of a dichroic substance when a dichroic substance other than iodine is used.

The object of the present invention is to provide a polarizer with a retardation layer, a polarizer composite, and an optical laminate provided with a novel polarizer, which replaces the dichroism formed by chemical treatment such as decolorization. Areas with low substance content.

The present invention provides the following polarizers with retardation layers, polarizer composites, and optical laminates.

[1] A polarizer with a retardation layer, comprising a polarizer and a retardation layer provided on one side of the polarizer, wherein:

The aforementioned polarizer has a polarized area with a thickness of 15 μm or less, and a non-polarized area surrounded by the aforementioned polarized area when viewed from above,

The non-polarized region is a region where a cured product of active energy ray curable resin is provided in a through hole surrounded by the polarized region in a plan view.

[2] The polarizer with a retardation layer as described in [1], wherein

The aforementioned retardation layer has: a retardation area, and a non-retardation area, the retardation area has a phase difference characteristic and exists in an area corresponding to the aforementioned polarization area; the non-phase difference area does not have a retardation characteristic and exists in the corresponding The aforementioned non-polarized light area;

The non-polarized region and the non-phase difference region are cured products containing active energy ray curable resin,

The non-phase difference region is a region where a cured product of active energy ray curable resin is provided in a through hole surrounded by the phase difference region in a plan view.

[3] The polarizer with a retardation layer as described in [2], wherein

The thickness of the cured product is the same as the thickness of the laminated structure portion including the polarizing region and the retardation region in the polarizer with retardation layer.

[4] The polarizer with a retardation layer as described in [2], wherein

The thickness of the cured product is smaller than the thickness of the layered structure portion including the polarizing region and the retardation region in the polarizer with retardation layer.

[5] The polarizer with a retardation layer as described in [2], wherein

The thickness of the cured product is greater than the thickness of the layered structure portion including the polarizing region and the retardation region in the polarizer with retardation layer.

[6] The polarizer with a retardation layer according to any one of [2] to [5], wherein

The aforementioned retardation region is a polymerized hardened layer of a polymerizable liquid crystal compound.

[7] The polarizer with a retardation layer as described in any one of [1] to [6], wherein the non-polarized region has translucency.

[8] The polarizer with a retardation layer according to any one of [1] to [7], wherein

The diameter of the non-polarized region in plan view is 0.5 mm or more and 20 mm or less.

[9] The polarizer with a retardation layer according to any one of [1] to [8], wherein:

The active energy ray-curable resin system contains an epoxy compound.

[10] The polarizer with a retardation layer according to [9], wherein the epoxy compound includes an alicyclic epoxy compound.

[11] A polarizer composite having: the polarizer with a retardation layer according to any one of [1] to [10], and a polarizer provided on at least one side of the polarizer with a retardation layer Reinforcing material, of which,

The reinforcing material system has a plurality of cavities, and the plurality of cavities are arranged so that each open end surface faces the surface of the polarizer.

[12] The polarizer composite according to [11], wherein the shape of the opening of the cell is a polygon, a circle, or an ellipse.

[13] The polarizer composite as described in [12], wherein a translucent filler is further provided in the internal space of the cell cavity.

[14] An optical laminate comprising the polarizer with retardation layer described in any one of [1] to [10], or the polarizer composite described in any one of [11] to [13] The body has a protective layer on one side or both sides.

[15] The optical laminate according to [14], wherein the protective layer is a cured product layer of active energy ray curable resin provided on the polarizer.

[16] The optical laminate according to [15], wherein the active energy ray curable resin constituting the protective layer is the same as the active energy ray curable resin constituting the cured product contained in the non-polarized region Active energy ray curable resin.

According to the present invention, it is possible to provide a polarizer with a retardation layer with a novel polarizer, a polarizer composite, and an optical laminate.

10: Polarizer

11: Polarized area

11m: first plane

11n: 2nd plane

12: Non-polarized area

17,18: protective layer

20: Raw material polarizer

21: Polarizer with aperture

22, 32, 36, 72: through hole

25: The first support layer

26: The second support layer

27: The third support layer

31: The first layered body

33: The second layered body

34: The third layered body

35: The fourth layered body

37: 5th layered body

40, 41: Polarizer with retardation layer

42,43: Polarizer composite

44 to 49: Optical laminate

50: Reinforcing material

51: cell cavity

53: Cell wall

70, 71: retardation layer

75: Phase difference area

76: non-phase difference area

80: Polymerized hardened layer with base material layer

81: Retardation layer with openings

84: substrate layer

85: polymer hardened layer

Fig. 1(a) is a schematic plan view of the polarizer side of an example of the polarizer with a retardation layer of the present invention, and Fig. 1(b) is a diagram of the polarizer with a retardation layer shown in Fig. 1(a) z-z' section view.

2(a) to 2(e) are schematic cross-sectional views schematically showing another example of the polarizer with a retardation layer of the present invention.

Figures 3(a) and 3(b) are diagrams schematically showing an example of a cross-section around the non-polarized region and the non-phase difference region of the polarizer with a retardation layer, and are used to illustrate the setting in the non-polarized region and An explanatory diagram of the method for determining the thickness of the cured product in the non-retardation area.

4(a) to 4(d) are schematic cross-sectional views schematically showing an example of the manufacturing method of the polarizer with retardation layer of the present invention.

5(a) and 5(b) are schematic cross-sectional views schematically showing successively the manufacturing method of the polarizer with retardation layer shown in FIG. 4.

6(a) to 6(d) are schematic cross-sectional views schematically showing another example of the manufacturing method of the polarizer with retardation layer of the present invention.

FIGS. 7(a) to 7(d) are schematic cross-sectional views schematically successively showing the manufacturing method of the polarizer with retardation layer shown in FIG. 6.

Fig. 8(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present invention, and Fig. 8(b) is a schematic plan view of the reinforcing material side of the polarizer composite.

Fig. 9 is a schematic cross-sectional view schematically showing another example of the polarizer composite of the present invention.

10(a) and 10(b) are schematic cross-sectional views schematically showing an example of the optical laminate of the present invention.

11(a) and 11(b) are schematic cross-sectional views schematically showing another example of the optical laminate of the present invention.

12(a) and 12(b) are schematic cross-sectional views schematically showing still another example of the optical laminate of the present invention.

Hereinafter, preferred embodiments of the polarizer with retardation layer, the polarizer composite, and the optical laminate of the present invention will be described with reference to the drawings. In all the following drawings, the scales are adjusted appropriately for easy understanding of the constituent elements. The scales of the constituent elements shown in the drawings and the actual constituent elements are not necessarily the same.

<Polarizer with retardation layer>

(Polarizer with retardation layer (1))

Fig. 1(a) is a schematic plan view of the polarizer side of an example of the polarizer with retardation layer of this embodiment, and Fig. 1(b) is the polarized light with retardation layer shown in Fig. 1(a) The z-z' cross-sectional view of the film. The polarizer 40 with retardation layer shown in FIGS. 1( a) and 1 (b) includes a polarizer 10 and a retardation layer 70 provided on one side of the polarizer 10.

As shown in FIG. 1( a ), the polarizer 10 of the polarizer 40 with retardation layer has a polarizing area 11 and a non-polarizing area 12. The thickness of the polarizing region 11 is 15 μm or less. The non-polarized area 12 is an area surrounded by the polarized area 11 in the top view of the polarizer 10. The non-polarized region 12 is a region where a cured product of active energy ray curable resin (hereinafter, sometimes referred to as "curable resin (X)") is provided in the through hole 22 surrounded by the polarized region 11 when viewed from above.

The thickness of the polarizing region 11 is 15 μm or less, 13 μm or less, 10 μm or less, 8 μm or less, 5 μm or less, and usually 1 μm or more. If the thickness of the polarizing region 11 exceeds the above-mentioned range, the workability for providing the active energy ray curable resin composition containing the curable resin (X) described later in the non-polarizing region 12 is likely to decrease. In addition, when the polarization region 11 is not within the above-mentioned range, it is difficult to obtain the desired optical characteristics. The thickness of the polarizing region 11 can be measured using, for example, a contact-type film thickness measuring device (MS-5C, manufactured by Nikon Co., Ltd.).

The arrangement of the polarized area 11 and the non-polarized area 12 in the polarizer 10 is not particularly limited as long as the polarized area 11 surrounds the non-polarized area 12. When the polarizer 10 is viewed from above, the total area occupied by the polarized region 11 is preferably larger than the total area occupied by the non-polarized region 12. As long as the polarizer 10 has one non-polarized region 12, it may have two or more non-polarized regions 12. When there are more than two non-polarized regions 12, the shapes of the non-polarized regions 12 may be the same or different from each other.

The entire retardation layer 70 is composed of retardation regions having retardation characteristics. The so-called retardation region refers to a region where at least one of the in-plane retardation value (R0) and the thickness direction retardation value (Rth) exceeds 40 nm in the wavelength of 590 nm.

The in-plane retardation value (R0) is a retardation value in a direction (in-plane direction) perpendicular to the thickness direction of the retardation layer 70, and can be obtained according to the following formula (I). Thickness direction retardation value (Rth) is the phase The retardation value of the thickness direction of the difference layer 70 can be obtained according to the following formula (II). Both the in-plane retardation value (R0) and the thickness direction retardation value (Rth) were measured with light with a wavelength of 590 nm at a temperature of 23°C.

R0=(Nx-Ny)×d (I)

Rth=[{(Nx+Ny)/2}-Nz]×d (II)[In formula (I) and formula (II),

Nx is the refractive index in the direction where the in-plane refractive index is the largest (that is, the slow axis direction),

Ny is the refractive index in the direction orthogonal to the slow axis in the plane (that is, the fast axis direction),

Nz is the refractive index in the thickness direction,

d is the thickness of the retardation layer [nm]. ]

The in-plane retardation value (R0) and the thickness direction retardation value (Rth) can be measured by, for example, a birefringence measuring device (trade name KOBRA-WPR) manufactured by Oji Measurement Instruments Co., Ltd.

The retardation characteristic of the retardation layer 70 is not particularly limited. The retardation layer 70 may have, for example, a quarter-wave plate, a half-wave plate, a quarter-wave plate with reverse wavelength dispersion, or a retardation characteristic that functions as a positive-C plate.

The thickness of the retardation layer 70 is not particularly limited, but may be 30 μm or less, 20 μm or less, 15 μm or less, 13 μm or less, 10 μm or less, or 8 μm or less. 5 μm or less, usually 1 μm or more.

Regarding the formation of the retardation layer 70, the material retardation layer described later can be used. The retardation layer 70 is, for example, a stretched film obtained by uniaxially or biaxially stretching a thermoplastic resin, or a polymerized hardened layer of a polymerizable liquid crystal compound.

The retardation layer 70 can be provided on one surface side of the polarizer 10 via a bonding layer not shown in the figure. Examples of the bonding layer system include a pressure-sensitive adhesive layer or an adhesive layer. use The adhesive used to form the adhesive layer and the adhesive used to form the adhesive layer include, for example, adhesives and adhesives used to form the filler described later. The polarizer 40 with retardation layer may have one retardation layer on one surface side of the polarizer 10, or may have two or more retardation layers. When there are two or more retardation layers, the retardation layers may be laminated with each other through the bonding layer, and the retardation characteristics may be the same or different from each other.

As shown in FIG. 1(a), the polarizer 40 with a retardation layer has a non-polarized region 12 surrounded by a polarized region 11 in a plan view. Therefore, when the polarizer 40 with a retardation layer is applied to a display device such as a liquid crystal display device such as a smartphone or a tablet terminal, or an organic EL display device, it is used to correspond to the non-polarized region 12 It is equipped with the printing part of the camera lens, icon or logo, etc., which can suppress the decrease of the sensitivity of the camera and the decrease of the design.

In the polarizer 40 with a retardation layer, since the non-polarized region 12 contains a cured product of the curable resin (X), the through hole 22 of the polarizer 10 can be made solid. The polarizer 10 of the polarizer 40 with retardation layer has a thickness of 15 μm or less. Therefore, if the non-polarized region 12 is not provided with a cured product of the curable resin (X) and the through hole 22 is in a hollow state, then Due to the shrinkage of the polarizer accompanying the temperature change experienced when it is applied to a display device, there is a risk of occurrence of defects such as cracks in the periphery of the through hole 22. In contrast, like the polarizer 10 included in the polarizer 40 with a retardation layer, by providing a cured product of curable resin (X) in the through hole 22, the non-polarized region 12 can be made solid, so it can be Suppress the occurrence of the above-mentioned undesirable situations.

(Polarizer with retardation layer (2))

2(a) to 2(e) are schematic cross-sectional views schematically showing another example of the polarizer with retardation layer of this embodiment. The polarizer 41 with a retardation layer shown in FIGS. 2( a) to 2 (e) includes a polarizer 10 and a retardation layer 71 provided on one side of the polarizer 10. The polarizer 10 is as described above.

The retardation layer 71, as shown in FIGS. 2(a) to 2(e), has a retardation area 75 having a retardation characteristic and a non-retarding area 76 having no retardation characteristic. The retardation region 75 refers to at least one of the in-plane retardation value (R0) and the thickness direction retardation value (Rth) in the wavelength of 590nm as described in the retardation layer 70 shown in FIG. It is a region exceeding 40nm. The so-called non-retardation region 76 refers to a region in which the in-plane retardation value (R0) and the thickness direction retardation value (Rth) are each 40 nm or less in the wavelength of 590 nm. The calculation and measurement of the in-plane retardation value (R0) and the thickness direction retardation value (Rth) can be performed according to the above-mentioned method.

In the retardation layer 71 included in the polarizer 41 with a retardation layer, the retardation region 75 exists in the region corresponding to the polarizing region 11 of the polarizer 10, and the non-phase difference region 76 exists in the region corresponding to the polarizer 10. In the area of the non-polarized area 12. Wherein, the so-called retardation area 75 exists in the area corresponding to the polarization area 11, which means that the retardation area 75 and the polarization area 11 are approximately the same shape and approximately the same size in the top view direction. Similarly, the so-called non-retardation area 76 The area corresponding to the non-polarized area 12 means that the non-phase difference area 76 and the non-polarized area 12 are approximately the same shape and approximately the same size (diameter) at approximately the same position in the top view direction. In other words, when the non-phase difference area 76 is projected onto the polarizer 10 in the top view direction, the projection area of the non-phase difference area 76 and the non-polarization area 12 in the polarizer 10 are substantially the same. According to the method of manufacturing a polarizer with a retardation layer described later, a polarizer with a retardation layer in which the retardation region 75 exists in the region corresponding to the polarizing region 11 can be efficiently manufactured. When the polarizer 10 included in the polarizer 41 with a retardation layer has two or more non-polarized regions 12, it is sufficient that the non-phase difference region 76 exists in the region corresponding to at least one non-polarized region 12 , The region corresponding to the other non-polarized regions 12 may also have a phase difference region 75.

The retardation layer 71 can be provided on one surface side of the polarizer 10 via a bonding layer not shown in the figure. Examples of the bonding layer system include an adhesive layer or an adhesive layer. The polarizer 41 with retardation layer may have one retardation layer on one surface side of the polarizer 10, or may have two or more retardation layers. When there are two or more retardation layers, the retardation layers may be laminated with each other through the bonding layer, and the retardation characteristics may be the same or different from each other. When there are two or more retardation layers, if at least one layer is the retardation layer 71, the other retardation layer may be the above-mentioned retardation layer 70, for example. At this time, the retardation layer 71 is preferably provided on the side relatively close to the polarizer 10.

The non-polarization region 12 and the non-phase difference region 76 of the polarizer 41 with a retardation layer are cured products containing curable resin (X). The non-polarized region 12 is a region where a cured product of the curable resin (X) is provided in the through hole 22 surrounded by the polarized region 11 in a plan view. The non-phase difference region 76 is surrounded by the phase difference region 75 in a plan view, and a cured product of the curable resin (X) is provided in the through hole 72 provided in the region corresponding to the through hole 22 described above. The through hole 22 of the polarizer 10 and the through hole 72 of the retardation layer 71 may be provided in the same shape in a plan view. The through hole 22 and the through hole 72 may be connected in the thickness direction of the polarized region 11, and a cured product of the curable resin (X) may be continuously provided in the through holes 22 and 72 that communicate with each other.

In the polarizer 41 with a retardation layer, similar to the polarizer 40 with a retardation layer shown in FIG. 1, when applied to a display device, it is possible to suppress a decrease in the sensitivity of the camera and a decrease in designability, and Can suppress the occurrence of the above-mentioned undesirable situations. In particular, in the polarizer 41 with a retardation layer, the retardation layer 71 has a non-retardation area 76. Therefore, by arranging the printing parts of the camera lens, icon, logo, etc. so as to correspond to the non-polarized area 12 and the non-phase difference area 76, it is possible to further suppress the decrease in the sensitivity of the camera and the decrease in design.

The thickness of the cured product of the curable resin (X) provided on the polarizer 41 with a retardation layer is the same as the thickness of the laminated structure part of the polarizer 41 with a retardation layer including the polarizing region 11 and the retardation region 75 It is the same (Figure 2(a)), it can also be smaller than the thickness of the layered structure part (Figure 2(b), Figure 2(c)), or greater than the thickness of the layered structure part (Figure 2(d), Figure 2(d)). 2(e)). The thickness of the above-mentioned layered structure portion may be the total thickness of the thickness of the polarizing region 11 and the thickness of the retardation region 75, and the total thickness may also include the thickness of the layer intervening between the polarizing region 11 and the retardation region 75 . For example, when the polarizer 41 with a retardation layer has a bonding layer between the polarizer 10 and the retardation layer 71, the thickness of the above-mentioned laminated structure is the sum of the thickness of the polarizing region 11 and the thickness of the retardation region 75 The thickness plus the thickness of the laminated layer. If the cured product of the curable resin (X) provided on the polarizer 41 with a retardation layer is to fill at least a part of the through hole 22 of the polarizer 10 and at least a part of the through hole 72 of the retardation layer 71 The way can be set. When the polarizer 41 with retardation layer has a bonding layer between the polarizer 10 and the retardation layer 71, a curable resin (X ) Can be hardened. The cured product of the curable resin (X) is preferably arranged to fill the entire through hole 22 of the polarizer 10, more preferably to fill the entire through hole 22 of the polarizer 10 and the through hole 72 of the retardation layer 71 The whole body and the through hole of the above-mentioned bonding layer are arranged in a whole way.

The thickness of the layered structure portion of the polarizer 41 with retardation layer including the polarizing region 11 and the retardation region 75 is preferably 30 μm or less, more preferably 25 μm or less, and even more preferably 20 μm or less, which may be It is 18 μm or less, and may be 16 μm or less, and is usually 2 μm or more. If the thickness of the laminated structure part exceeds the above range, the workability for providing the cured product of the curable resin (X) in the non-polarized region 12 and the non-phase difference region 76 is likely to decrease as described later. The thickness can be measured using, for example, a contact-type film thickness measuring device (MS-5C, manufactured by Nikon Co., Ltd.).

The thickness of the cured product provided on the polarizer 41 with a retardation layer is determined as follows. First, in the polarizer 41 with retardation layer, it is assumed that the first plane including the surface of the polarization region 11 of the polarizer 10 (the surface on the opposite side to the retardation layer 71 side) and the phase including the retardation layer 71 The second plane of the surface of the difference region 75 (the surface on the opposite side to the polarizer 10 side). Next, in the non-polarized region 12, the first position and the second position are determined. The first position is the position when the shortest distance between the surface of the hardened object on the side of the polarizer 10 and the first plane becomes the largest, and the second position The position is the position when the shortest distance between the surface of the hardened object on the side of the retardation layer 71 and the second plane becomes the largest. Then, the total value (dm+dn+D) of the shortest distance (dm) of the first position, the shortest distance (dn) of the second position, and the distance (D) between the first plane and the second plane (dm+dn+D) is set in the attachment The thickness of the cured product of the polarizer 41 of the retardation layer.

Based on FIG. 3, the thickness of the cured product when the non-polarized region 12 and the non-phase difference region 76 are provided, and the layered structure portion of the polarizer 41 with a retardation layer including the polarizing region 11 and the retardation region 75 will be specifically explained. The thickness is the method of determining the thickness at different times. Figures 3(a) and 3(b) are diagrams schematically showing an example of a cross section around the non-polarized area and the non-phase difference area of a polarizer with a retardation layer, and are used to illustrate the non-polarized area and the non-polarized area. An explanatory diagram of the method of determining the thickness of the cured product in the retardation zone.

3 (a) when the non-polarized region 12 and the non-phase difference region 76 are provided with a cured material, the "along the polarizer 10 on the opposite side of the phase difference layer 71 side is located on the non- The "straight line of the polarization region 12" is assumed to be the first plane 11m. In the shortest straight line connecting "an arbitrary point on the first plane 11m" and "an arbitrary point on the surface of the hardened object provided in the non-polarized region 12", the length of the straight line (Figure 3 ( The position when "dm" in a) becomes the maximum is set to the first position. Then, as shown in FIG. 3(a), the "Along the retardation layer 71 and the polarizer 10 side opposite to the side The "straight line shown by the chain line at one point in the non-phase difference region 76 on the surface side" is assumed to be the second plane 11n. In the shortest straight line connecting "an arbitrary point on the second plane 11n" and "an arbitrary point on the surface of the hardened object provided in the non-phase difference region 76", the length of the straight line (Fig. 3( The position where "dn" in a) becomes the largest is regarded as the second position. Here, as shown in FIG. 3(a), in the thickness direction of the polarizer 41 with retardation layer, when the surface of the hardened object provided in the non-polarized region 12 and the non-retardation region 76 exists on the first plane When 11m and the second plane 11n are closer to the inner surface side (the polarizer 10 and the retardation layer 71 side), dm and dn are negative values. Also, let D be the distance between the first plane 11m and the second plane 11n (corresponding to the thickness of the layered structure portion). In this way, the thickness of the cured product provided in the non-polarized region 12 and the non-phase difference region 76 shown in FIG. 3(a) can be determined as D+dm+dn (dm and dn are negative values).

In addition, as shown in FIG. 3(b), when a hardened substance is provided in the non-polarized region 12 and the non-phase difference region 76, the same as the above, the first plane 11m and the second plane 11n can be assumed to be Determine the thickness of the cured product provided in the non-polarized region 12 and the non-phase difference region 76. Specifically, first, the length of the straight line connecting "an arbitrary point on the first plane 11m" and "an arbitrary point on the surface of the hardened object provided in the non-polarized region 12" becomes the shortest distance, and the length of the straight line ("Dm" in Figure 3(b)) The position when it becomes the maximum is set to the first position. Then, the length of the straight line connecting "any point on the second plane 11n" and "any point on the surface of the hardened object provided in the non-phase difference region 76" becomes the shortest distance (Figure 3 The position when "dn" in (b) becomes the maximum is set to the second position. Here, as shown in FIG. 3(b), in the thickness direction of the polarizer 41 with a retardation layer, when the surface of the cured product provided in the non-polarization region 12 and the non-phase difference region 76 is 11m from the first plane And the second plane 11n is closer to the outer side (the side opposite to the polarizer 10 and the retardation layer 71 side), dm and dn are displayed as positive values. In this way, the thickness of the hardened material provided in the non-polarized region 12 and the non-phase difference region 76 shown in FIG. 3(b) can be determined as D+dm+dn (dm and dn are positive values).

The polarizers 40 and 41 with retardation layer may be circular polarizers. At this time, the retardation layer 70 and the retardation region 75 of the retardation layer 71 may have retardation characteristics that function as a quarter-wave plate. When the polarizers 40 and 41 with retardation layers are circularly polarizing plates, two or more retardation layers 70 and 71 may be provided on one side of the polarizer 10. For example, the retardation layers 70 and 71 may be laminated on one side of the polarizer 10 in the following manner; the retardation characteristic becomes: [a] 1/2-wavelength plate and 1/4-wavelength plate are arranged in order, [b] Arrange in the order of the reverse wavelength dispersion quarter-wave plate and the positive C plate, or [c] arrange the order of the positive C plate and the reverse wavelength dispersion quarter-wave plate.

The polarizer 40 with a retardation layer may be a sheet-shaped body, or may be an elongated body having a length that is wound into a roll shape during storage or transportation. The planar shape and size of the polarizer 40 with retardation layer are not particularly limited.

(Polarized area)

The polarization region 11 of the polarizer 10 preferably exhibits absorption dichroism in the wavelength range of 380 nm to 780 nm. The polarizer 10 has the property of absorbing linearly polarized light having a vibrating surface parallel to its absorption axis, and transmitting linearly polarized light having a vibrating surface orthogonal to the absorption axis (parallel to the penetration axis). This property is mainly Obtained by the polarization zone 11.

For example, the polarizing region 11 can be used: hydrophilic polymer films such as polyvinyl alcohol-based films, partially formalized polyvinyl alcohol-based films, ethylene/vinyl acetate copolymer-based partially saponified films, etc., have iodine or dichroism adsorbed/oriented Dyes and other dichroic substances; the dehydrated polyvinyl alcohol or the dehydrochloric acid treatment of polyvinyl chloride and other polyolefin-based oriented films or liquid crystal compounds are oriented to absorb/orientate dichroic substances 者; etc. Among them, in terms of excellent optical properties, it is preferable to use a polyvinyl alcohol-based film dyed with iodine and uniaxially stretched.

First, the manufacturing method of the polyvinyl alcohol-based film that will become the preferred polarization region 11 is dyed with iodine and uniaxially stretched.

Dyeing with iodine can be performed, for example, by immersing a polyvinyl alcohol-based film in an iodine aqueous solution. The stretching ratio of uniaxial stretching is preferably 3 to 7 times. The extension system may be performed after the dyeing treatment, or the extension may be performed while dyeing. Also, dyeing may be performed after stretching.

The polyvinyl alcohol-based film may be subjected to swelling treatment, cross-linking treatment, washing treatment, drying treatment, etc. as needed. For example, by immersing the polyvinyl alcohol-based film in water for washing before dyeing, not only can the surface of the polyvinyl alcohol-based film be cleaned of dirt or anti-caking agent, but also the polyvinyl alcohol-based film can be swollen to prevent staining. Unequal.

The stretching treatment, dyeing treatment, crosslinking treatment (boric acid treatment), water washing treatment, and drying treatment of the polyvinyl alcohol-based resin film can be performed, for example, according to the method described in JP 2012-159778 A. In the method described in this document, a polyvinyl alcohol-based resin layer is formed into the polarizing region 11 by coating a base film with a polyvinyl alcohol-based resin. At this time, the base film system used can also be used as the first support layer 25 described later.

Next, a brief description will be given of the polarization region 11 where the dichroic dye is adsorbed/oriented to the oriented liquid crystal compound. At this time, the polarization region 11 can be used, for example, as described in Japanese Patent Laid-Open No. 2013-37353, Japanese Patent Laid-Open No. 2013-33249, Japanese Patent Laid-Open No. 2016-170368, Japanese Patent Laid-Open No. 2017-83843, etc. Those with dichroic pigments oriented in the cured film formed by the polymerization of the liquid crystal compound. Dichroic pigments can be those having absorption in the wavelength range of 380 to 800 nm, and organic dyes are preferably used. Examples of dichroic dyes include azo compounds. Liquid crystal compound series A liquid crystal compound that can be polymerized in an aligned state and can have a polymerizable group in the molecule. The cured film formed by the polymerization of such a liquid crystal compound can be formed on the base film. In this case, the base film can also be used as the first support layer 25 described later.

After the polarizing film used in the polarizing region 11 is manufactured as described above, it is preferable to form the polarizing film 10 by forming the non-polarizing region 12 by perforation processing. In this specification, the polarizing film formed by only the polarizing region 11 in this way is sometimes referred to as the raw material polarizer 20.

The degree of polarization correction (Py) of the polarized light region 11 is preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 99% or more. The monomer transmittance (Ts) of the polarizing region 11 is usually less than 50%, and may be less than 46%. The monomer transmittance (Ts) of the polarizing region 11 is preferably at least 39%, more preferably at least 39.5%, still more preferably at least 40%, particularly preferably at least 40.5%.

The monomer transmittance (Ts) is the Y value measured in accordance with JIS Z8701's 2 degree field of view (C light source) and corrected for visual sensitivity. Visual sensitivity correction polarization (Py) and monomer transmittance (Ts) can be measured, for example, using an ultraviolet-visible spectrophotometer (manufactured by JASCO Corporation, product name: V7100), and based on the parallel traverse for visual sensitivity correction The transmittance Tp and the orthogonal transmittance Tc are obtained by the following equations.

Py[%]={(Tp-Tc)/(Tp+Tc)} ^/1/2 ×100

(Non-polarized area)

Generally speaking, the so-called "unpolarized light" refers to the irregular light that can be observed in the electric field component. In other words, the so-called non-polarized light system does not observe the dominant random light in a specific polarization state. In addition, the so-called "partially polarized light" means light in an intermediate state between polarized light and non-polarized light, and is a mixture of at least one of linearly polarized light, circularly polarized light, and elliptical polarized light with non-polarized light. The non-polarized area 12 in the polarizer 10 means that the light (transmitted light) that passes through the non-polarized area 12 becomes non-polarized or partially polarized. In particular, the non-polarized light region where the transmitted light is non-polarized light is preferable.

The non-polarized area 12 of the polarizer 10 is an area surrounded by the polarized area 11 when viewed from above. The non-polarized light region 12 is a cured product containing curable resin (X). The non-polarized region 12 is preferably provided with an active energy ray curable resin composition containing curable resin (X) described later in the through hole provided in the polarizer (raw polarizer 20) formed by only the polarized region 11 Of hardened things. The non-polarized light region 12 has translucency. In this specification, the so-called light transmittance refers to the property (transmittance) that penetrates more than 80% of visible light with a wavelength in the range of 400nm to 700nm, preferably more than 85%, and more than 90%. The better is better, and the better if it penetrates more than 92%. The definition of "transmittance" below and the preferred range of transmittance for visible light are also the same as above.

By making the non-polarized region 12 of the polarizer 10 light-transmissive, optical transparency in the non-polarized region 12 can be ensured. With this, when the polarizers 40 and 41 with retardation layer are applied to the display device, the printing part of the camera lens, icon or logo can be arranged corresponding to the non-polarized area 12, thereby suppressing the sensitivity of the camera. Decrease or decrease in design.

The planar shape of the non-polarized region 12 is not particularly limited, but it can be round; elliptical; oval; polygons such as triangles or quadrangles; at least one corner of the polygon is rounded (shaped with R) Rounded polygons, etc.

The diameter of the non-polarized region 12 is preferably 0.5 mm or more, and may be 1 mm or more, 2 mm or more, or 3 mm or more. The diameter of the non-polarized region 12 is preferably 20 mm or less, and may be 15 mm or less, 10 mm or less, or 7 mm or less. The diameter of the non-polarized region 12 refers to the length of the longest straight line in the straight line connecting any two points on the outer periphery of the non-polarized region 12.

The thickness of the cured product of the curable resin (X) provided in the non-polarized area 12 may be the same as the thickness of the polarized area 11, may be smaller than the thickness of the polarized area 11, or may be greater than the polarized area 11 The thickness. As described above, the cured product of the curable resin (X) provided in the non-polarized region 12 is preferably provided so as to fill the entire through hole 22.

The thickness of the cured product provided in the non-polarized region 12 can be measured in accordance with the above-described method for measuring the thickness of the cured product provided on the polarizer 41 with a retardation layer. Specifically, as long as the second plane is set as the surface on the opposite side of the surface of the polarizing region 11 of the polarizer 10 to the surface contained as the first plane in the above-mentioned measuring method, the curable resin (X) is determined The thickness of the hardened material is sufficient.

(Phase difference area)

The retardation layer 71 has retardation characteristics, and this property is mainly obtained by the retardation region 75. At least one of the in-plane retardation value (R0) and the thickness direction retardation value (Rth) of the retardation region 75 at a wavelength of 590 nm is more than 40 nm, and may be independently 100 nm or more, or 500 nm or more, It may be 1000 nm or more, and it is usually 15000 nm or less.

The retardation region 75 can have retardation characteristics that function as a quarter-wave plate, a half-wave plate, a quarter-wave plate with reverse wavelength dispersion, or a positive C plate, for example. As described above, a plurality of types of retardation layers having different retardation characteristics may be laminated as the retardation region 75.

The retardation region 75 can be a region formed by a raw material retardation layer whose entirety is a retardation region, which will be described later. When a plurality of types of phase difference layers having mutually different phase difference characteristics are laminated as the phase difference region 75, what is necessary is just to laminate the plurality of types as the raw material phase difference layer. Therefore, the retardation region 75 is formed of the material constituting the material retardation layer described later, and specifically, may include a thermoplastic resin. The retardation region can be formed by, for example, a stretched film obtained by uniaxially or biaxially extending a thermoplastic resin, or a polymerized hardened layer of a polymerizable liquid crystal compound, or the like.

The thickness of the retardation region 75 is preferably 15 μm or less, and may be 13 μm or less, or 10 μm or less, or 8 μm or less, or 5 μm or less, and usually 1 μm or more.

(Non-phase difference area)

The non-phase difference region 76 of the retardation layer 71 is a region surrounded by the phase difference region 75 when viewed from above. The in-plane retardation value (R0) and thickness direction retardation value (Rth) of the non-retardation area 76 at a wavelength of 590nm are below 40nm, and can be independently 35nm or less, 30nm or less, or 20nm. Hereinafter, it may be 0 nm.

The non-phase difference region 76 is a cured product that can contain the curable resin (X) in the through hole 72 surrounded by the phase difference region 75 in a plan view. The thickness of the cured product of the curable resin (X) provided in the non-retardation area 76 may be the same as the thickness of the retardation area 75, may be smaller than the thickness of the non-retardation area 76, or may be greater than the non-retardation area The thickness of 76. As described above, the cured product of the curable resin (X) provided in the non-phase difference region 76 is preferably provided so as to fill the entire through hole 72. As will be described later, by setting such a non-phase difference area 76 to correspond to the non-polarization area 12, when the polarizers 40 and 41 with a phase difference layer are applied to a display device, the non-polarization area 76 corresponds to the non-polarization area. 12 and the non-phase difference area 76 arranging the printing part of the camera lens, icon or logo, etc., can suppress the decrease of the sensitivity of the camera and the decrease of the design.

The thickness of the cured product provided in the non-retardation area 76 can be measured in accordance with the above-described method for measuring the thickness of the cured product provided on the polarizer 41 with a retardation layer. Specifically, as long as the first plane is set as the surface on the opposite side of the surface of the retardation region 75 of the retardation layer 71 to the surface containing the second plane in the above-mentioned measurement method, the curable resin ( X) The thickness of the hardened material is sufficient.

The planar shape and diameter of the non-phase difference region 76 are not particularly limited, and examples of the planar shape and diameter of the non-polarized region 12 are exemplified. The planar shape and diameter of the non-phase difference region 76 are preferably the same as the planar shape and diameter of the non-polarization region 12, respectively.

(Active energy ray curable resin composition (curable resin composition))

The non-polarized region 12 in the polarizer 40 with retardation layer and the non-polarized region 12 and the non-phase difference region 76 in the polarizer 41 with retardation layer are as described above, and are provided with active energy ray curable resin ( The area of the cured product of the curable resin (X) is preferably formed of an active energy ray curable resin composition (hereinafter, also referred to as "curable resin composition") containing the curable resin (X) . The curable resin (X) contained in the curable resin composition is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. The curable resin (X) is preferably an ultraviolet curable resin that is cured by ultraviolet irradiation. The curable resin composition containing the curable resin (X) may be an active energy ray curable adhesive. In this case, an ultraviolet curable adhesive is more preferable.

The curable resin composition is preferably a solvent-free type. The solvent-free type refers to the inactive addition of solvents. Specifically, the solvent-free curable resin composition refers to 100% by weight of the curable resin (X) contained in the curable resin composition, and the solvent content It is 5% by weight or less.

The curable resin (X) preferably contains an epoxy compound. The term "epoxy compound" refers to a compound having one or more (preferably two or more) epoxy groups in the molecule. Examples of the epoxy compound system include alicyclic epoxy compounds, aliphatic epoxy compounds, and hydrogenated epoxy compounds (glycidyl ethers of polyhydric alcohols having an alicyclic ring). The epoxy compound system contained in the curable resin (X) may be one type or two or more types.

Relative to 100% by weight of the curable resin (X), the content of the epoxy compound is preferably 40% by weight or more, more preferably 50% by weight or more, and even more preferably 60% by weight or more. Relative to hard The chemical resin (X) is 100% by weight, and the content of the epoxy compound may be 100% by weight or less, and it may be 90% by weight or less, 80% by weight or less, or 75% by weight or less.

The epoxy equivalent of the epoxy compound is usually 40 to 3000 g/equivalent, preferably in the range of 50 to 1500 g/equivalent. If the epoxy equivalent exceeds 3000 g/equivalent, the compatibility with other components contained in the curable resin (X) may decrease.

The epoxy compound contained in the curable resin (X) preferably contains an alicyclic epoxy compound. The alicyclic epoxy compound is an epoxy compound having one or more epoxy groups bonded to an alicyclic ring in the molecule. The "epoxy group bonded to an alicyclic ring" means a bridged oxygen atom -O- in the structure shown in the following formula. In the following formula, m is an integer of 2 to 5.

_{A compound in which one or more hydrogen atoms in (CH 2} ) _m in the above formula is removed and bonded to another chemical structure can become an alicyclic epoxy compound. One or more hydrogen atoms in (CH ₂ ) _m may be appropriately substituted with a linear alkyl group such as a methyl group or an ethyl group. Among the alicyclic epoxy compounds, epoxy compounds having an oxabicyclohexane ring (where m=3 in the above formula) or an oxabicycloheptane ring (where m=4 in the above formula), Since the polarizing region 11 of the polarizer 10 and the retardation region 75 of the retardation layer 71 and the cured product of the curable resin (X) forming the non-polarization region 12 and the non-retardation region 76 can be provided with excellent adhesion , So it can be better used. The following are specific examples of alicyclic epoxy compounds that can be preferably used, but are not limited to these compounds.

[a] The epoxy cyclohexyl methyl esters of epoxy cyclohexane carboxylic acid represented by the following formula (IV):

[式(IV)中，R⁸及R⁹係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基。]

[In formula (IV), R ⁸ and R ⁹ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

[b] The epoxy cyclohexane carboxylates of alkanediol represented by the following formula (V):

[式(V)中，R¹⁰及R¹¹係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基，n係表示2至20之整數。]

[In formula (V), R ¹⁰ and R ¹¹ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and n represents an integer of 2 to 20. ]

[c] Epoxy cyclohexyl methyl esters of dicarboxylic acids represented by the following formula (VI):

[式(VI)中，R¹²及R¹³係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基，p係表示2至20之整數。]

[In formula (VI), R ¹² and R ¹³ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and p represents an integer of 2 to 20. ]

[d] Epoxy cyclohexyl methyl ethers of polyethylene glycol represented by the following formula (VII):

[式(VII)中，R¹⁴及R¹⁵係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基，q係表示2至10之整數。]

[In formula (VII), R ¹⁴ and R ¹⁵ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and q represents an integer of 2 to 10. ]

[e] The epoxy cyclohexyl methyl ethers of alkanediol represented by the following formula (VIII):

[式(VIII)中，R¹⁶及R¹⁷係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基，r係表示2至20之整數。]

[In formula (VIII), R ¹⁶ and R ¹⁷ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and r represents an integer of 2 to 20. ]

[f] Diepoxy trispiro compound represented by the following formula (IX):

[式(IX)中，R¹⁸及R¹⁹係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基。]

[In formula (IX), R ¹⁸ and R ¹⁹ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

[g] Diepoxy monospiro compound represented by the following formula (X):

[式(X)中，R²⁰及R²¹係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基。]

[In the formula (X), R ²⁰ and R ²¹ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

[h] Vinyl cyclohexene diepoxides represented by the following formula (XI):

[式(XI)中，R²²係表示氫原子或碳數1至5之直鏈狀烷基。]

[In formula (XI), R ²² represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

[i] Epoxy cyclopentyl ethers represented by the following formula (XII):

[式(XII)中，R²³及R²⁴係互相獨立地表示氫原子或碳數1至5之直鏈狀烷基。]

[In the formula (XII), R ²³ and R ²⁴ independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

[j] Diepoxytricyclodecanes represented by the following formula (XIII):

[式(XIII)中，R²⁵係表示氫原子或碳數1至5之直鏈狀烷基。]

[In formula (XIII), R ²⁵ represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms. ]

Examples of the aliphatic epoxy compound series include polyglycidyl ethers of aliphatic polyhydric alcohols or alkylene oxide adducts thereof. More specifically, examples include: 1,4-butanediol diglycidyl ether; 1,6-hexanediol diglycidyl ether; glycerol triglycidyl ether; trimethylolpropane Triglycidyl ether; diglycidyl ether of polyethylene glycol; diglycidyl ether of propylene glycol; by adding one or more rings to aliphatic polyols such as ethylene glycol, propylene glycol or glycerin Polyglycidyl ether of polyether polyol obtained by oxyalkylene (ethylene oxide or propylene oxide).

The hydrogenated epoxy compound is obtained by reacting an alicyclic polyol obtained by hydrogenating the aromatic ring of an aromatic polyol with epichlorohydrin. Aromatic polyols include: bisphenol-type compounds such as bisphenol A, bisphenol F, and bisphenol S; novolac-type resins such as phenol novolak resin, cresol novolak resin, and hydroxybenzaldehyde phenol novolak resin; Multifunctional compounds such as hydroxydiphenylmethane, tetrahydroxybenzophenone, and polyvinylphenol. A preferable one among the hydrogenated epoxy compounds is the diglycidyl ether of hydrogenated bisphenol A.

The curable resin (X) may contain a (meth)acrylic compound and the like together with an active energy ray curable compound such as an epoxy compound. By using a (meth)acrylic compound in combination, it can be expected to increase the polarizing region 11 of the polarizer 10 and the retardation region 75 of the retardation layer 71, and the curable resin (X The effect of the adhesion between the cured products of ), the hardness and mechanical strength of the cured product of the curable resin (X), and the adjustment of the viscosity or curing speed of the curable resin (X) Make it easier. "(Meth)acrylic acid" means at least one selected from the group consisting of acrylic acid and methacrylic acid.

The curable resin composition containing the curable resin (X) preferably contains a polymerization initiator. Examples of the polymerization initiator system include cationic polymerization initiators such as photocationic polymerization initiators or radical polymerization initiators. The photocationic polymerization initiator is one that generates cationic species or Lewis acid by irradiation of active energy rays such as visible rays, ultraviolet rays, X-rays, and electron rays, and initiates the polymerization reaction of epoxy groups. As described above, the curable resin (X) is preferably an ultraviolet curable resin that is cured by ultraviolet radiation, and the curable resin (X) preferably contains an alicyclic epoxy compound, so the polymerization initiator in this case Preferably, the cationic species or Lewis acid is generated by irradiation of ultraviolet rays.

The curable resin composition can further contain photosensitizers, polymerization accelerators, ion traps, antioxidants, chain transfer agents, tackifiers, thermoplastic resins, fillers, flow regulators, plasticizers, and defoamers Additives such as agents, antistatic agents, leveling agents, etc.

(Method for manufacturing polarizer with retardation layer (1))

4 and 5 are schematic cross-sectional views schematically showing an example of the manufacturing method of the polarizer with retardation layer of this embodiment. 4 and 5 show how the polarizer 40 with retardation layer shown in FIG. 1 is obtained. The polarizer 40 with a retardation layer can be manufactured using, for example, the raw material polarizer 20 having the same visual sensitivity correction polarization (Py) and not having the non-polarized region 12 as a whole. The raw material of the polarizer 20 series only consists of The polarizing region 11 of the above-mentioned polarizer 10 is formed. Therefore, the thickness of the raw polarizer 20 is preferably the same thickness as the polarizing region 11 of the polarizer 10, which is 15 μm or less.

The polarizer 40 with retardation layer can be manufactured according to the following steps, for example. First, as shown in FIG. 4( a ), a first layered body 31 is prepared in which a first support layer 25 is provided on one surface of the raw material polarizer 20 so as to be peelable from the raw material polarizer 20. For the prepared first laminated body 31, a through hole 32 penetrating in the laminated direction is formed by punching, cutting, cutting, laser cutting, or the like (FIG. 4(b)). In this way, the polarizer 21 with openings in which the through-hole 22 is formed in the raw polarizer 20 is obtained. Then, after the second support layer 26 is releasably provided on the side of the polarizer 21 with the aperture of the first laminate 31 in which the through holes 32 are formed (FIG. 4(c)), the first support layer 25 is peeled off ( Figure 4(d)). Thereby, the second laminated body 33 in which the second support layer 26 and the polarizer 21 with openings are laminated is obtained (FIG. 4(d)). The second supporting layer 26 is provided in a manner of sealing one side of the through hole 22 of the polarizer 21 with an opening.

Then, the through hole 22 of the polarizer 21 with the opening of the second layered body 33 is filled with a curable resin composition containing curable resin (X), and the curable resin composition in the through hole 22 is irradiated with active energy rays. The resin (X) hardens. Thereby, a cured product of curable resin (X) is formed in the through hole 22 of the polarizer 21 with a hole, and a third laminate 34 in which the polarizer 10 is laminated on the second support layer 26 is obtained (FIG. 5(a) )). In the polarizer 10 of the third layered body 34, the region other than the through hole 22 of the polarizer 21 with an opening becomes the polarizing region 11, and the region where the through hole 22 of the cured product is provided becomes the non-polarizing region 12. Then, a retardation layer 70 is laminated on the polarizer 10 side of the third layered body 34 via a bonding layer not shown in the figure to form a polarizer 40 with a retardation layer. After the retardation layer 70 is laminated, the second support layer 26 can be peeled off.

The method of filling the curable resin composition in the through hole 22 of the polarizer 21 with an opening is not particularly limited. For example, a dispenser or dispenser can be used to inject the curable resin composition The through hole 22 of the polarizer 21 with the opening of the second laminate 33; it is also possible to coat the curable resin composition on the surface of the polarizer 21 with the opening of the second laminate 33 to increase the curability The resin composition is filled in the through hole 22 of the polarizer 21 with openings. The cured layer of the curable resin composition coated on the surface of the polarizer 21 with openings can be used as a protective layer described later. When the curable resin composition is applied, a base film may be provided to cover the surface of the coating layer formed by coating. The base film can also be used as a protective layer described later, and in this case, the cured product layer of the curable resin (X) can also be used as a bonding layer for bonding the protective layer described later. The base film may be peeled after the curable resin (X) contained in the curable resin composition is cured.

The first support layer 25 may be a support layer used in the production of the raw material polarizer 20, and the above-mentioned base film used when the curable resin composition is applied may also be used. Alternatively, it may be a peelable support layer bonded to the raw material polarizer 20 with a volatile liquid such as water, or may be a peelable adhesive sheet for the raw material polarizer 20. The second support layer 26 may be a peelable support layer attached to the polarizer 21 with openings by a volatile liquid such as water, or it may be a peelable adhesive sheet for the polarizer 21 with openings.

By disposing the retardation layer 70 on the polarizer 10 provided with the non-polarizing region 12, the polarizer 40 with retardation layer shown in FIG. 1(b) can be manufactured. The retardation layer 70 may be a stretched film obtained by uniaxially or biaxially stretched thermoplastic resin, or may be a polymerized hardened layer of a polymerizable liquid crystal compound. When the retardation layer 70 is a polymerized hardened layer, a polymerized hardened layer in which a polymerizable liquid crystal compound is polymerized and hardened on a base layer to form a polymerized hardened layer with a base material layer can also be used. After the polymer hardened layer side of the polymer hardened layer with the base layer is laminated on the polarizer 10 side of the third layered body 34 via the bonding layer, the base layer is peeled off, thereby forming a phase on the polarizer 10差层70。 Difference layer 70.

As described above, by setting the thickness of the raw polarizer 20 to be 15 μm or less, the depth of the through hole 22 provided in the polarizer 21 with an opening can also be 15 μm or less. Thereby, the filling of the curable resin composition in the through-hole 22 of the polarizer 21 with an opening and the curable resin (X) contained in the curable resin composition filled in the through-hole 22 can be performed in a short time. ) Hardening treatment, it can suppress the decrease of workability.

(Method for manufacturing polarizer (2) with retardation layer)

6 and 7 are schematic cross-sectional views schematically showing an example of the method of manufacturing the polarizer with retardation layer of this embodiment. Figures 6 and 7 show how to obtain the polarizer 41 with retardation layer shown in Figure 2(a), but it can also be manufactured by the method described below. Figures 2(c) and 2(e) ) Shows the polarizer 41 with retardation layer. For the polarizer 41 with a retardation layer, for example, the raw material polarizer 20 (Figure 6(a)) that has the same visual sensitivity correction polarization (Py) as a whole and does not have the non-polarized area 12 (FIG. 6(a)), and uses the entire retardation area The polymerized hardened layer 85 (FIG. 6(b)) is produced as a raw material retardation layer. The raw material polarizer 20 becomes the polarizing region 11 of the above-mentioned polarizer 10. Therefore, the thickness of the raw material polarizer 20 is preferably the same thickness as the polarizing region 11 of the polarizer 10, but 15 μm or less. The polymer hardened layer 85 becomes the retardation region 75 of the above-mentioned retardation layer 71. Therefore, the thickness of the polymer hardened layer 85 is preferably the same thickness as the retardation region 75 of the retardation layer 71.

The polarizer 41 with a retardation layer can be manufactured according to the following steps, for example. First, the first laminate 31 is prepared according to the procedure described in the method of manufacturing the polarizer 40 with retardation layer (FIG. 6(a)). Prepare a polymerized hardening layer 80 with a substrate layer (FIG. 6(b)), which polymerizes and hardens the polymerizable liquid crystal compound on the substrate layer 84, and on the substrate layer 84 is formed a phase difference area as a whole 85 persons with a polymerized hardened layer. The polymer hardened layer 85 side of the polymer hardened layer 80 with the base material layer is laminated on the raw material polarizer 20 side of the prepared first layered body 31 via a bonding layer not shown in the figure (FIG. 6(c)). With this, a substrate layered in sequence is obtained The fourth layered body 35 of the layer 84, the polymerized hardened layer 85, the raw material polarizer 20, and the first support layer 25 (FIG. 6(c)). For the fourth laminate 35, through holes 36 (including through holes 22 and 72) (including through holes 22, 72) penetrating in the laminate direction are formed by punching, cutting, cutting, or laser cutting, etc. (FIG. 6(d)). The support layer 25 is 1 to obtain the fifth layered body 37 (Fig. 7(a) ). Thereby, the polarizer 21 with through holes 22 formed in the raw material polarizer 20 and the retardation layer 81 with through holes 72 formed in the polymer hardened layer 85 are obtained.

Then, the third support layer 27 is laminated on the side of the polarizer 21 with openings of the fifth laminated body 37 (FIG. 7( b )), and the base layer 84 is peeled off (FIG. 7( c )). The third supporting layer 27 is provided in a manner of sealing one side of the through hole 22 of the polarizer 21 with an opening. Thereafter, a curable resin composition containing curable resin (X) is filled in the through holes 22 of the polarizer 21 with openings and the through holes 72 of the retardation layer 81 with openings, and the active energy is irradiated The wire hardens the curable resin (X) in the through holes 22 and 72, and the curable resin (X) is formed in the through hole 22 of the polarizer 21 with an opening and the through hole 72 of the retardation layer 81 with an opening. The hardened object (Figure 7(d)). In this way, the polarizer 41 with a retardation layer is obtained on the third support layer 27. The polarizer 41 with retardation layer is formed by laminating the polarizer 10 and the retardation layer 71 in this order on the third support layer 27. After the cured product is formed, the third support layer 27 can be peeled off. In the obtained polarizer 10, the region other than the through hole 22 of the polarizer 21 with openings becomes the polarizing region 11, and the region where the through hole 22 is provided with the hardened material becomes the non-polarizing region 12. In the obtained retardation layer 71, the region other than the through hole 72 of the retardation layer 81 with openings becomes the retardation region 75, and the region where the through hole 72 is provided with the hardened material becomes the non-retardation region 76. Next, the non-polarized area 12 in the polarizer 10 and the non-phase difference area 76 in the retardation layer 71 are connected to each other.

The polarizer 41 with a retardation layer shown in FIG. 2(a) can also be manufactured in the following manner instead of the above-mentioned method, for example. The following shows how to obtain the polarizer 41 with retardation layer shown in FIG. 2(a), but it is also possible to manufacture the attachment shown in FIG. 2(b) and FIG. 2(d) by the method described below. Phase difference Layer of polarizer 41. As shown in Figs. 6(c) and 6(d), after the through holes 36 penetrating in the lamination direction are formed by punching, cutting, cutting, or laser cutting, the fourth laminate 35 is peeled off. The base material layer 84. Then, the fourth support layer is laminated on the side exposed after the base layer 84 is peeled off (the side of the retardation layer 81 with openings), and the first support layer 25 is peeled off. The fourth support layer is provided in a manner of sealing one side of the through hole 72 of the retardation layer 81 with an opening. Thereafter, the curable resin composition is filled in the through holes 22 of the polarizer 21 with openings and the through holes 72 of the retardation layer 81 with openings, and the through holes 22 and 72 are irradiated with active energy rays. The curable resin (X) contained in the curable resin composition is cured, and the curable resin (X) is formed in the through holes 22 of the polarizer 21 with openings and the through holes 72 of the retardation layer 81 with openings The hardened object. In this way, the polarizer 41 with a retardation layer is obtained on the fourth support layer. The polarizer 41 with retardation layer is formed by laminating the retardation layer 71 and the polarizer 10 in this order on the fourth support layer. After the hardened product is formed, the fourth support layer can be peeled off.

The method of filling the through holes 22 of the polarizer 21 with openings and the through holes 72 of the retardation layer 81 with openings with a curable resin composition can be cited in the manufacture of a polarizer with a coating layer (1) The filling method described in the method. When the through holes 22 and 72 are filled with the curable resin composition while coating the curable resin composition on the surface of the perforated polarizer 21, the surface of the perforated polarizer 21 is coated The cured layer of the curable resin composition can be used as a protective layer described later. When applying the curable resin composition, a base film may be provided to cover the surface of the coating layer formed by coating. The base film can be used as a protective layer described later. In this case, the cured product layer of the curable resin (X) can be used as a bonding layer for bonding the protective layer described later. The base film can be peeled off after curing the curable resin (X) contained in the curable resin composition.

The method of installing the third supporting layer 27 and the fourth supporting layer can be exemplified as a method of installing the first supporting layer 25 and the second supporting layer 26.

As described above, by setting the thickness of the raw polarizer 20 to be 15 μm or less, the depth of the through hole 22 provided in the polarizer 21 with an opening can also be 15 μm or less. As explained with respect to the polarizer 41 with retardation layer, the thickness of the laminated structure including the polarizing region 11 and the retardation region 75 in the polarizer 41 with retardation layer is preferably 30 μm or less, so it is used as a raw material The thickness of the polymerized hardened layer 85 of the retardation layer is preferably 15 μm or less. Therefore, the depth of the through hole 72 provided in the retardation layer 81 with an opening may also be set to 15 μm or less. Thereby, the total depth of the through-hole 22 and the through-hole 72 can be 30 micrometers or less. Therefore, the filling of the curable resin (X) of the through-hole 22 of the polarizer 21 with the aperture and the through-hole 72 of the retardation layer 71 with the aperture, and the filling of the through-hole 22 and the curable resin (X) can be performed in a short time. The hardening treatment of the curable resin (X) of the through hole 72 can suppress the decrease in workability.

Here, the production of the raw material polarizer and the raw material phase difference layer used for the production of the polarizer with retardation layer will be briefly described.

(Material Polarizer)

The raw material polarizer 20 is preferably one that is not likely to be significantly deteriorated by the active energy rays irradiated for curing the curable resin (X) filled in the curable resin composition of the through hole 22. Such a raw material polarizer 20 is, for example, a film formed by adsorbing/orientating a dichroic dye on a polyvinyl alcohol-based resin film, or a film having a dichroic dye oriented in a hardened layer of a polymerizable liquid crystal compound, etc. The manufacturing method is as described in the above-mentioned polarizing region 11.

(Raw material retardation layer)

The entire material retardation layer is composed of retardation regions with retardation characteristics. The raw material retardation layer is, for example, the retardation layer 70 described above or the retardation characteristic of the retardation region. The raw material retardation layer may have retardation characteristics that function as a quarter-wave plate, a half-wave plate, a quarter-wave plate with reverse wavelength dispersion, or a positive C plate, for example.

The raw material retardation layer is, for example, a stretched film obtained by uniaxially or biaxially stretched thermoplastic resin, or a polymerized hardened layer of a polymerizable liquid crystal compound.

The thermoplastic resin constituting the stretched film is preferably a thermoplastic resin having translucency (preferably optically transparent). Specifically, examples include: polyolefin resins such as chain polyolefin resins (polyethylene resins, polypropylene resins, etc.), cyclic polyolefin resins (norbornene resins, etc.); cellulose triacetate , Cellulose diacetate, cellulose acetate propionate, cellulose acetate butyrate and other cellulose ester resins; polyethylene terephthalate, polybutylene terephthalate, polynaphthalene Ethylene Dicarboxylate, Polybutylene Naphthalate, Polytrimethylene Terephthalate, Polytrimethylene Naphthalate, Polycyclohexane Dimethyl Terephthalate, Polycyclohexane Naphthalate Polyester resins such as dimethyl; polycarbonate resins; (meth)acrylic resins; polystyrene resins; or mixtures and copolymers of these.

The polymerizable liquid crystal compound constituting the polymerized hardened layer is a compound that has a polymerizable reactive group and exhibits liquid crystallinity. Examples of the polymerizable reactive group include those exemplified in the raw material polarizer. 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. Regarding the liquid crystallinity of the polymerizable liquid crystal compound, the liquid crystallinity may be either a thermotropic liquid crystal or a lyotropic liquid crystal. As far as the phase order structure is concerned, it may be a nematic liquid crystal or a smectic liquid crystal.

The raw material retardation layer can be formed by the following method: [v] For example, on the alignment layer formed on the base film, a composition for forming a retardation layer containing a polymerizable liquid crystal compound is applied to make the polymerizable liquid crystal compound A method of polymerizing and curing; [vi] A method of coating a phase difference layer forming composition on a substrate layer to form a coating film, and extending the coating film together with the substrate layer. Examples of the substrate layer include the substrate film used in the above-mentioned [ii] described in the raw material polarizer.

As for the stretched film and the polymerized hardened layer constituting the material retardation layer, for example, the retardation layer described in International Publication No. 2018/003416 can be cited.

<Polarizer Complex>

(Polarizer Complex (1))

Fig. 8(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of this embodiment, and Fig. 8(b) is a schematic plan view of the reinforcing material side of the polarizer composite. The polarizer composite 42 shown in FIG. 8(a) has: the polarizer 40 with a retardation layer shown in FIG. 1(b), and the retardation layer 70 side of the polarizer 40 with a retardation layer. The reinforcement material 50. The reinforcing material 50 can be provided on the side of the polarizer 10 in addition to the side of the retardation layer 70 of the polarizer 40 with a retardation layer.

In the polarizer composite 42, the reinforcing material 50 has a plurality of cavities 51, and the plurality of cavities are arranged such that each open end face faces the surface of the polarizer 10. Each opening end surface can be directly connected to the polarizer 10, or it can be opposite to the surface of the polarizer 10 via the retardation layer 70 as shown in the polarizer composite 42 shown in FIG. 8(a). to. The cell cavity 51 has a hollow columnar (cylindrical) structure surrounded by a cell wall 53 dividing the cell 51, and the axial ends of the columnar structure are opened to become open end faces.

In the polarizer composite 42, the reinforcing material 50 is set so that there are cavities 51 in the non-polarized area 12 of the polarizer 10 and the area corresponding to (projected) around the polarizer 10 as shown in FIG. 8(a). Preferably, it is more preferable to set the cell 51 on the entire surface of the polarizer 40 with retardation layer.

Since the polarizer 10 has the non-polarized region 12, it is believed that the periphery of the non-polarized region 12 is likely to be cracked due to the shrinkage of the polarizer 10 due to temperature changes when applied to a display device. In addition, since the thickness of the polarizing region 11 of the polarizer 10 is as thin as 15 μm or less, it is prone to cracks when it is impacted. In the polarizer composite 42, it is believed that the phase-attached The polarizer 40 of the differential layer is provided with a reinforcing material 50 on one side thereof, so that cracks in the polarizer 10 caused by temperature changes or impact, or fine cracks, can be prevented from deteriorating into large cracks. From the viewpoint of the impact resistance of the polarizer composite 42, the reinforcing material 50 is preferably provided at least on the retardation layer 70 side of the polarizer 40 with a retardation layer.

The reinforcing material 50 is applied to a display device and the like together with the polarizer 10. If the internal space of the cell 51 of the reinforcing material 50 is hollow, the visibility of the display device may be reduced due to the difference in refractive index between the cell wall 53 and the internal space of the cell 51. Therefore, it is preferable to provide a translucent filler in the internal space of the cell 51 of the reinforcing material 50 in the polarizer composite 42. Regarding the reinforcing material 50 of the polarizer composite body 42, when a gap is provided between a plurality of cells 51 as described later, it is preferable that a translucent filler is also provided in the gap. Such fillers are described below.

(Polarizer Complex (2))

FIG. 9 is a schematic cross-sectional view schematically showing another example of the polarizer composite of this embodiment. The polarizer composite 43 shown in FIG. 9 has: the polarizer 41 with a retardation layer shown in FIG. 2(a), and a reinforcing material provided on the retardation layer 71 side of the polarizer 41 with a retardation layer 50. Here, the case where the reinforcing material 50 is provided on the side of the retardation layer 71 of the polarizer 41 with a retardation layer is shown, but the reinforcing material 50 is also provided on the side of the retardation layer 71 of the polarizer 41 with a retardation layer. It can be arranged on the side of the polarizer 10 again. In addition, the reinforcing material 50 may not be provided on the side of the retardation layer 71 but on the side of the polarizer 10. However, from the viewpoint of impact resistance, the reinforcing material 50 is provided on the polarizer 40 with a retardation layer. The retardation layer 71 side is preferable.

The reinforcing material 50 series is as described above. As described above, the reinforcing material 50 can be provided with a filler in the internal space of the cell 51 of the reinforcing material 50 and the gap between the plurality of cells 51.

The polarizer composite 43 shown in FIG. 9 has the polarizer 41 with retardation layer and the reinforcing material 50 shown in FIG. 2(a), but it is not limited to this. For example, the polarizer 41 with a retardation layer contained in the polarizer composite 43 may also be the polarizer 41 with a retardation layer shown in FIGS. 2(b) to 2(e).

(Reinforcing material)

The cell 51 of the reinforcing material 50 is as described above, and has a hollow columnar (cylindrical) structure surrounded by the cell wall 53 dividing the cell 51, and the axial direction of the columnar structure is two The end system becomes the open end face through the opening. The cell 51 has a first opening end surface disposed on the side relatively close to the polarizer 10 of the polarizer assembly 42 and 43, and a second opening end surface disposed on the relatively far side as the opening end surface. The reinforcing material 50 may be arranged such that at least one of the first opening end surface and the second opening end surface is opposed to the polarizer 10, and it is preferable that both the first opening end surface and the second opening end surface are The polarizer 10 is arranged opposite to each other.

The shape of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, but a polygonal shape, a circular shape, or an elliptical shape is preferable. The shape of the opening of the first opening end surface and the shape of the opening of the second opening end surface are preferably the same shape with the same size, but they may be different shapes, or the same shape but different sizes. In addition, the opening shapes of the plurality of cells of the reinforcing material 50 may be the same or different from each other.

The plurality of cavities 51 of the reinforcing material 50 are preferably arranged in such a way that the openings of the cavities 51 are adjacent to each other when viewed from the top of the open end surface. When the plurality of cavities 51 are viewed from the top of the open end surface, for example, as shown in FIG. 8(b), the opening shape of the cavities 51 is hexagonal, etc., so that the cavities 51 are arranged without gaps. arrangement. Alternatively, when the plurality of cells 51 are in a plan view of the open end surface, the shape of the opening of the cell 51 is circular, etc., so that a part of the cell wall 53 of the plurality of cells 51 is in contact with each other, and The cavities 51 are arranged with gaps between them.

The reinforcing material 50 is preferably, for example, as shown in FIG. 8(b), the shape of the opening in either the first opening end surface and the second opening end surface is hexagonal, and is in the direction of the surface of the polarizer composite 42 , It has a honeycomb structure in which a plurality of cells are arranged in such a way that the openings are arranged adjacent to each other without gaps.

The size of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, but it is preferable to have a diameter smaller than that of the non-polarizing region 12. The diameter of the cell cavity is preferably 3 mm or less, and can be 2 mm or less, or 1 mm or less, usually 0.1 mm or more, or 0.5 mm or more. The diameter of the opening of the cell 51 refers to the length of the longest straight line in the straight line connecting any two points on the outer periphery of the opening.

The height of the cell 51 of the reinforcing material 50 (the length in the direction orthogonal to the open end surface of the cell 51) is usually 0.1 μm or more, may be 0.5 μm or more, may be 1 μm or more, or may be 3 μm or more, and, It is usually 15 μm or less, may be 13 μm or less, or may be 10 μm or less.

The cell wall 53 that divides the cell 51 of the reinforcing material 50 is preferably light-transmissive.

The line width of the cell wall 53 of the reinforcing material 50 is, for example, 0.05 mm or more, can be 0.1 mm or more, can also be 0.5 mm or more, can also be 1 mm or more, and is usually 5 mm or less, or can be 3 mm or less .

The cell wall 53 of the reinforcing material 50 can be formed of, for example, a resin material or an inorganic oxide, and is preferably formed of a resin material. Examples of the resin material system include curable resins such as thermoplastic resins, thermosetting resins, and active energy ray curable resins. The resin material system includes, for example, the above-mentioned curable resin (X); the thermoplastic resin exemplified as the thermoplastic resin used in the above-mentioned filler, and the like. Examples of the inorganic oxide include silicon oxide (SiO ₂ ), aluminum oxide, and the like.

When reinforcing materials 50 are provided on both sides of the polarizers 40 and 41 with retardation layers, the two reinforcing materials 50 may be the same as each other (the shape and size of the cell 51 are the same), or they may be each other Different. Assume The openings of the cells 51 of the two reinforcing materials 50 placed on both sides of the polarizers 40 and 41 with retardation layers may be arranged to overlap each other in a plan view, but they are preferably arranged to be shifted from each other in a plan view.

(Filling material)

The filling material that can be provided in the reinforcing material 50 is not particularly limited, as long as it has translucency and can fill the internal space of the cell 51 of the reinforcing material 50. The filler material is preferably a material different from the material constituting the cell wall 53 of the reinforcing material 50, and preferably contains a resin material. The resin material system includes, for example, one or more selected from the group consisting of curable resins such as thermoplastic resins, thermosetting resins, and active energy ray curable resins, and may also be adhesives or adhesives.

Examples of thermoplastic resins include polyolefin resins such as chain polyolefin resins (polypropylene resins, etc.), cyclic polyolefin resins (norbornene resins, etc.); cellulose triacetate, cellulose diacetate, etc. Ester resins; polyester resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polycarbonate resins; (meth)acrylic resins; poly Styrene-based resin; polyether-based resin; polyurethane-based resin; polyamide-based resin; polyimide-based resin; fluorine-based resin, etc.

The curable resin system includes, for example, the above-mentioned curable resin (X).

Adhesives are those that exhibit adhesiveness by attaching themselves to the adherend, so-called pressure-sensitive adhesives. The adhesive system can include polymers such as (meth)acrylic polymers, silicone polymers, polyester polymers, polyurethane polymers, polyether polymers, or rubber polymers as main components. By.

In this specification, the so-called main component means a component that contains 50% by mass or more in the total solid content of the adhesive. The adhesive can be an active energy ray hardening type or a thermal hardening type, and the crosslinking degree or adhesive force can also be adjusted by active energy ray irradiation or heating.

The adhesive is an adhesive other than a pressure-sensitive adhesive (adhesive) containing a curable resin component. Examples of the adhesive system include water-based adhesives prepared by dissolving or dispersing curable resin components in water, active energy ray curable adhesives containing active energy ray curable compounds, thermosetting adhesives, and the like.

The adhesive can also be a water-based adhesive commonly used in the technical field of polarizing plates. Examples of the resin component system contained in the water-based adhesive include polyvinyl alcohol-based resins and urethane-based resins. Examples of the active energy ray curable adhesive system include compositions that are cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays. The active energy ray curable adhesive can also use the curable resin composition containing the curable resin (X) described above. Examples of the thermosetting adhesive system include epoxy resins, silicone resins, phenol resins, melamine resins, and the like as main components.

(Method of manufacturing polarizer composite)

The polarizer composites 42 and 43 shown in FIGS. 8 and 9 are manufactured by forming a reinforcing material 50 on the polarizers 40 and 41 with retardation layers. The reinforcing material 50 can be obtained, for example, by using a resin material or an inorganic oxide, and forming a cell partition wall 53 that divides the cell 51 on the surface of the polarizers 40 and 41 with a retardation layer.

The method of using a resin material to form the cell wall 53 is not particularly limited. Examples include printing methods such as inkjet printing, screen printing, and gravure printing; photolithography; coating using a nozzle or die. Law and so on. In the above method, a resin composition obtained by mixing a resin material, a solvent, additives, etc., can also be used. Examples of additives include leveling agents, antioxidants, plasticizers, tackifiers, organic or inorganic fillers, pigments, anti-aging agents, ultraviolet absorbers, antioxidants, and the like. The cell wall 53 can also be formed by curing or hardening the printed or coated resin composition as needed.

The method of forming the cell partition wall 53 using an inorganic oxide is not particularly limited, but it can be formed by, for example, vapor deposition of an inorganic oxide.

When the reinforcing material 50 of the polarizer composites 42, 43 has a filler, it is only necessary to fill the material constituting the filler with the reinforcing material 50 formed on the polarizers 40, 41 with a retardation layer in the inner space or cell of the cell 51 The gap between the cavities 51 is sufficient. The material constituting the filling material can be filled by coating on the reinforcing material 50, for example. Alternatively, when an adhesive is used as the material constituting the filler, an adhesive sheet provided with an adhesive layer can be attached to the release film to fill the adhesive.

<Optical Laminate>

10 to 12 are schematic cross-sectional views schematically showing an example of the optical laminate of the present embodiment. In the optical laminated system, the polarizers 40 and 41 with retardation layer shown in FIGS. 1 and 2 and the polarizer composites 42 and 43 shown in FIGS. 8 and 9 have protective layers on one side or both sides.

(Optical laminate (1))

The optical laminates 44, 45 shown in Figs. 10(a) and 10(b) have: polarizers 40, 41 with retardation layers shown in Figs. 1(b) and 2(a); The protective layer 17 on the side of the polarizer 10 of the polarizers 40 and 41 with retardation layer. The polarizer 41 with a retardation layer may be the polarizer 41 with a retardation layer shown in FIG. 2(b) to FIG. 2(e).

The protective layer 17 is a cured product layer of the curable resin (X) contained in the curable resin composition directly provided on the polarizer 10. The curable resin (X) constituting the protective layer 17 belonging to the curable layer includes, for example, the curable resin (X) described above. The protective layer 17 is the same as the curable resin (X) of the cured product contained in the non-polarized region 12 of the polarizer 10, or the non-polarized region 12 of the polarizer 10 and the non-phase difference region 76 of the retardation layer 71 The cured layer of the curable resin (X) is preferable.

When the protective layer 17 is a cured layer of the same curable resin (X) as the curable resin (X) that constitutes the cured material of the polarizers 40 and 41 with retardation layer, the protective layer 17 is preferably at least covering the polarizer The non-polarized area 12 of the light sheet 10. The protective layer 17 may cover at least a part of one side of the polarizer 10, but it is preferable to cover the entire surface of one side of the polarizer 10.

In order to manufacture the optical layered bodies 44, 45, it is described in the above-mentioned method of manufacturing the polarizers 40, 41 with retardation layer (for example, on the polarizer 10 side of the polarizers 40, 41 with retardation layer) Coating a curable resin composition, and irradiating active energy rays to make the curable resin (X) [and the through hole 22 of the polarizer 21 with openings or the through hole of the polarizer 21 with openings] 22 and the curable resin (X) of the through-hole 72 of the retardation layer 81 with an opening are cured together]. Thereby, the protective layer 17 of the cured material layer of the curable resin (X) can be formed on the polarizer 10 of the polarizers 40 and 41 with retardation layer, and the optical laminated bodies 44 and 45 can be obtained.

Alternatively, when manufacturing the optical laminate 44 shown in FIG. 10(a), the following method can be used. By applying a curable resin composition on the surface of the polarizer 21 with openings in the second laminate 33 (FIG. 4(d)), the curable resin composition is filled in the polarizer with openings 21 through holes 22, and a coating layer of a curable resin composition is formed on the surface of the polarizer 21 with openings. Thereafter, the curable resin (X) contained in the curable resin composition inside and on the surface of the through-hole 22 of the polarizer 21 with a hole can be cured by irradiation of active energy rays to form a cured product and The protective layer 17 belonging to the cured product layer obtains an optical laminate 44. At this time, the retardation layer 71 only needs to be provided on the side opposite to the side on which the protective layer 17 of the polarizer 10 is formed. Thereby, the cured product contained in the non-polarized region 12 can be integrated with the cured product layer constituting the protective layer 17, and the cured product system of the curable resin (X) constituting the protective layer 17 can be set to be the same as the non-polarized region 12 The hardened substance contained is the same.

When manufacturing the optical laminate 45 shown in FIG. 10(b), the following method can be used. In the above-described fourth support layer, a phase difference layer 81 with openings and a polarizer 21 with openings are laminated in this order, and the surface of the polarizer 21 with openings is coated Curable resin composition. Thereby, the curable resin composition containing the curable resin (X) is filled in the through holes 22 of the polarizer 21 with openings and the through holes 72 of the retardation layer 81 with openings, and in the openings The surface of the polarizer 21 forms a coating layer of a curable resin composition. Afterwards, the through-hole 22 of the polarizer 21 with openings, the through-hole 72 of the retardation layer 81 with openings, and the polarizer 21 with openings can be irradiated by active energy rays. The curable resin (X) contained in the coating layer is cured to form a cured product and a protective layer 17 belonging to the cured product layer, and an optical laminate 45 is obtained. At this time, the cured product contained in the non-polarized region 12 and the non-retardation region 76 can be integrated with the cured product layer constituting the protective layer 17, and the curable resin (X) constituting the protective layer 17 can be set to The curable resin (X) of the cured material contained in the non-polarized region 12 and the non-phase difference region 76 is the same.

When the protective layer 17 belonging to the hardened layer is provided on the polarizer 41 with retardation layer shown in FIG. 2(b), the difference in thickness between the polarized region 11 and the non-polarized region 12 of the polarizer 10 can be buried The protective layer 17 is set in the way. Specifically, if the thickness of the non-polarized region 12 of the polarizer 10 shown in FIG. 2(b) is smaller than the thickness of the polarized region 11 (the surface side of the upper side of FIG. 2(b)), it is filled The protective layer 17 may be provided by applying a curable resin composition to coat the surface of the polarizing region 11 with a difference in thickness.

When the protective layer 17 belonging to the hardened layer is provided on the polarizer 41 with retardation layer shown in FIG. 2(d), the non-polarized area 12 of the polarizer 10 shown in FIG. 2(d) can be compared with the polarized area On the side where the surface of 11 is more protruding (the surface side on the upper side in FIG. 2(d)), a curable resin composition is applied to fill the difference in thickness, and a protective layer 17 is provided. At this time, the protective layer 17 may cover the surface of the non-polarized region 12 or not cover the surface of the non-polarized region 12.

When applying the curable resin composition, the base film can be provided so as to cover the surface of the coating layer formed by coating. At this time, the base film may be used as the protective layer 17, and the curable resin (X) The cured product layer serves as a bonding layer for bonding the protective layer 17 to the polarizer 41 with a retardation layer. The base film may be peeled after curing the curable resin (X).

(Optical laminate (2))

The optical laminates 46, 47 shown in Figs. 11(a) and 11(b) are provided on both sides of the polarizers 40, 41 with retardation layers shown in Figs. 1(b) and 2(a) Protective layer 17,18. The optical layered bodies 46 and 47 may have the protective layer 17 (or 18) only on one side of the polarizers 40 and 41 with a retardation layer. The polarizer 41 with retardation layer may also be the polarizer 41 with retardation layer shown in FIG. 2(b) to FIG. 2(e).

The protective layers 17 and 18 can be provided on the polarizers 40 and 41 with retardation layers via a bonding layer such as an adhesive layer or an adhesive layer. In this case, for example, the protective layers 17 and 18 in the form of a film may be laminated on the polarizers 40 and 41 with retardation layers via a bonding layer. When the optical layered body 47 is shown in FIG. 2(b) or FIG. 2(d), when the protective layer 17 is provided on the polarizer 10 side of the polarizer 41 with a retardation layer via a bonding layer, it is preferably embedded The bonding layer is provided to fill the thickness difference between the polarized region 11 and the non-polarized region 12 of the polarizer 10, and the protective layer 17 is provided. When the optical layered body 47 is shown in FIG. 2(c) or FIG. 2(e), the protective layer 18 is provided on the retardation layer 71 side of the polarizer 41 with retardation layer via a bonding layer, it is preferably A bonding layer is provided to fill the thickness difference between the retardation region 75 of the retardation layer 71 and the non-retardation region 76, and the protective layer 18 is provided.

The protective layers 17 and 18 may be provided on the polarizers 40 and 41 with the retardation layer in direct contact without the bonding layer. The protective layers 17 and 18 provided on the polarizer 10 side of the polarizers 40 and 41 with retardation layer can be, for example, applied to the retardation layer with a composition containing a resin material constituting the protective layers 17 and 18 The polarizers 40 and 41 on the polarizer 10 or the retardation layers 70 and 71 are formed by curing or hardening the coating layer. When the optical laminate 47 is one in which the protective layer 17 is provided on the polarizer 10 side of the polarizer 41 with a retardation layer shown in FIG. 2(b) or FIG. 2(d) via a bonding layer, it is preferably The composition containing the resin material constituting the protective layer 17 is arranged to fill the thickness difference between the polarized region 11 and the non-polarized region 12 of the polarizer 10 to form the protective layer 17. When the optical laminate 47 is one in which the protective layer 18 is provided via a bonding layer on the retardation layer 71 side of the polarizer 41 with a retardation layer shown in FIG. 2(c) or FIG. 2(e), it is preferably The composition containing the resin material constituting the protective layer 18 is provided to fill the difference in thickness between the retardation region 75 of the retardation layer 71 and the non-retardation region 76 to form the protective layer 18.

(Optical laminate (3))

The optical laminates 48 and 49 shown in FIGS. 12(a) and 12(b) have protective layers 17, 18 on both sides of the polarizer composites 42 and 43 shown in FIGS. 8(a) and 9. The optical layered bodies 48 and 49 may have the protective layer 17 (or 18) only on one side of the polarizer composite bodies 42 and 43. The protective layers 17 and 18 can be provided on the polarizer composites 42 and 43 through an adhesive layer or an adhesive layer or other bonding layers. In this case, for example, what is necessary is just to laminate|stack the protective layers 17 and 18 of a film form on the polarizer composite 42 and 43 via a bonding layer. The protective layer 18 provided on the side of the reinforcing material 50 of the polarizer composites 42, 43, for example, only needs to be provided with stickers in such a way as to fill the internal space of the cell 51 of the reinforcing material 50 and the gaps between the plurality of cells 51. Laminated layer, and layered protective layer is enough.

Alternatively, it is also possible to fill the reinforcing material with a laminated sheet in which a coating layer that becomes the material of the bonding layer is formed on one side of the film-like protective layer on the reinforcing material 50. The internal space of the cell 51 of 50 and the gaps between the plurality of cells 51 form a protective layer.

The protective layers 17 and 18 may be provided on the polarizer composites 42 and 43 in direct contact without the bonding layer. The protective layers 17, 18 provided on the polarizer 10 side of the polarizer composites 42, 43 can be, for example, applied to the polarizer composites 42, 43 by coating a composition containing a resin material constituting the protective layers 17, 18 on the polarizer composites 42, 43. The polarizer 10 is formed by curing or hardening the coating layer. The protective layer 18 provided on the side of the reinforcing material 50 of the polarizer composites 42, 43 can be embedded and filled in the cell 51 of the reinforcing material 50 The protective layer 18 is formed by disposing a composition including a resin material constituting the protective layer 18 in such a manner as the space between the cells and the gaps between the plurality of cavities 51.

The protective layer 17 (or 18) provided on the one side of the polarizers 40, 41 with retardation layer and the polarizer composites 42, 43 is directly connected to the polarizer 40 with retardation layer. , 41 and the polarizer composites 42, 43, the protective layer 17 (or 18) can be set to form the non-polarized region 12 of the polarizer 40 and the polarizer composite 42 with a retardation layer. , Or the curable resin (X) of the hardened material contained in the non-polarized region 12 and the non-cell region 56 of the polarizer 41 and the polarizer composite 43 with retardation layer is the same curable resin (X)物层。 The material layer. Thereby, the cured product contained in the non-polarized region 12, or the non-polarized region 12 and the non-cellular region 56 can be made to be the same as the cured resin (X) that constitutes the cured product layer constituting the protective layer 17 (or 18) as The same curable resin (X).

For the protective layers 17, 18, one of them can be a protective layer provided through a bonding layer, and the other can be a protective layer provided without a bonding layer. The protective layers 17 and 18 contained in the optical laminates 46 to 49 may be the same or different from each other.

When the polarizer composites 42 and 43 have a structure in which reinforcing materials 50 are provided on both sides of the polarizers 40 and 41 with retardation layers, the protective layers 17 and 18 may be provided on the reinforcing materials 50 on both sides, respectively.

(The protective layer)

The protective layers 17 and 18 are preferably light-permeable resin layers, and may also be resin films, or coating layers formed by coating a composition containing a resin material. The resin used in the resin layer is preferably a thermoplastic resin that is excellent in transparency, mechanical strength, thermal stability, moisture barrier properties, isotropy, and extensibility. The thermoplastic resin series can be listed in the thermoplasticity of the base film that can be used in the production of the above-mentioned raw material polarizer 20. Resin. When the optical laminates 44 to 49 and 91 to 94 have protective layers 17 and 18 on both sides, the resin compositions of the protective layers 17 and 18 may be the same or different from each other.

From the viewpoint of thinning, the thickness of the protective layers 17 and 18 is generally 200 μm or less, preferably 150 μm or less, more preferably 100 μm or less, and may be 80 μm or less, or may be 60 μm or less. The thickness of the protective layers 17, 18 is usually 5 μm or more, may be 10 μm or more, or may be 20 μm or more. The protective layers 17, 18 may or may not have a phase difference. When the optical laminates 44 to 49 and 91 to 94 have protective layers 17, 18 on both sides, the thicknesses of the protective layers 17, 18 may be the same or different from each other.

(Laminated layer)

The bonding layer is an adhesive layer or an adhesive layer. The adhesive used to form the adhesive layer and the adhesive system used to form the adhesive layer include, for example, the adhesives and adhesives used to form the above-mentioned filler.

<Laminate with bonding layer for optical display elements>

Polarizers 40, 41 with retardation layer shown in Figures 1 and 2, polarizer composites 42, 43 shown in Figures 8 and 9, and optical laminates 44 to 49 series shown in Figures 10 to 12 It may further have a bonding layer for an optical display element for bonding to an optical display element (liquid crystal panel, organic EL element) of a display device such as a liquid crystal display device or an organic EL display device.

When the polarizer 41 with a retardation layer shown in FIGS. 2(b) to 2(e) is between the polarized region 11 and the non-polarized region 12, or between the retardation region 75 and the non-phase difference region 76 When the bonding layer for optical display elements is provided on the surface where the thickness difference occurs, it is preferable to provide the bonding layer for optical display elements to fill the thickness difference.

In the polarizer composites 42, 43 and the optical laminates 48, 49, when an optical display element bonding layer is provided on the surface of the reinforcing material 50, the material constituting the optical display element bonding layer can be used The material is used as a filler provided in the reinforcing material 50, and the filling of the internal space of the cell 51 of the reinforcing material 50 and the formation of the bonding layer for the optical display element are performed at the same time.

10: Polarizer

11: Polarized area

12: Non-polarized area

22: Through hole

40: Polarizer with retardation layer

70: retardation layer

Claims (16)

A polarizer with a retardation layer is provided with a polarizer and a retardation layer arranged on one side of the aforementioned polarizer, wherein: The aforementioned polarizer has a polarized area with a thickness of 15 μm or less, and a non-polarized area surrounded by the aforementioned polarized area when viewed from above, The non-polarized region is a region where a cured product of active energy ray curable resin is provided in a through hole surrounded by the polarized region in a plan view. The polarizer with retardation layer according to claim 1, wherein: The aforementioned retardation layer has: a retardation area, and a non-retardation area, the retardation area has a phase difference characteristic and exists in an area corresponding to the aforementioned polarization area; the non-phase difference area does not have a retardation characteristic and exists in the corresponding The aforementioned non-polarized light area; The aforementioned non-polarized region and the aforementioned non-phase difference region are cured products containing active energy ray curable resin; The non-phase difference region is a region where a cured product of active energy ray curable resin is provided in a through hole surrounded by the phase difference region in a plan view. The polarizer with retardation layer according to claim 2, wherein: The thickness of the cured product is the same as the thickness of the laminated structure portion including the polarizing region and the retardation region in the polarizer with retardation layer. The polarizer with retardation layer according to claim 2, wherein: The thickness of the cured product is smaller than the thickness of the laminated structure portion of the polarizer with retardation layer including the polarization region and the retardation region. The polarizer with retardation layer according to claim 2, wherein: The thickness of the cured product is greater than the thickness of the layered structure portion of the polarizer with retardation layer including the polarization region and the retardation region. The polarizer with a retardation layer according to any one of claims 2 to 5, wherein: The aforementioned retardation region is a polymerized hardened layer of a polymerizable liquid crystal compound. The polarizer with a retardation layer according to any one of claims 1 to 6, wherein: The aforementioned non-polarized light region has light transmittance. The polarizer with a retardation layer according to any one of claims 1 to 7, wherein: The diameter of the non-polarized region in plan view is 0.5 mm or more and 20 mm or less. The polarizer with a retardation layer according to any one of claims 1 to 8, wherein: The active energy ray-curable resin system contains an epoxy compound. The polarizer with a retardation layer according to claim 9, wherein the epoxy compound includes an alicyclic epoxy compound. A polarizer composite, comprising: the polarizer with a retardation layer according to any one of claims 1 to 10, and a reinforcing material provided on at least one side of the polarizer with the retardation layer; The reinforcing material system has a plurality of cavities, and the plurality of cavities are arranged so that each open end surface faces the surface of the polarizer. The polarizer composite according to claim 11, wherein the shape of the opening of the cell cavity is polygonal, circular, or elliptical. The polarizer composite body according to claim 12, wherein a translucent filler is further provided in the inner space of the aforementioned cell. An optical laminate on one side or both sides of the polarizer with retardation layer according to any one of claims 1 to 10, or the polarizer composite according to any one of claims 11 to 13 The side has a protective layer. The optical laminate according to claim 14, wherein the protective layer is a cured product layer of active energy ray curable resin provided on the polarizer. The optical laminate according to claim 15, wherein the active energy ray curable resin constituting the protective layer is the same active energy ray curable resin as the active energy ray curable resin constituting the cured product contained in the non-polarized region Curing resin.

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