KR20220084383A - A polarizer having a retardation layer, a polarizer composite, and an optical laminate - Google Patents

Abstract

A polarizer having a retardation layer has a polarizer and a retardation layer provided on one surface side of the polarizer. A polarizer has a polarization area|region whose thickness is 15 micrometers or less, and a non-polarization area|region surrounded by the polarization area|region in planar view. A non-polarization area|region is the area|region in which the hardened|cured material of active energy ray-curable resin was provided in the through-hole enclosed by the polarization area|region in planar view.

Description

A polarizer having a retardation layer, a polarizer composite, and an optical laminate

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

A polarizer is widely used as a polarization|polarized-light supply element in display apparatuses, such as a liquid crystal display device and an organic electroluminescent (EL) display device, and also as a polarization detection element. A display device having a polarizer is also developed in mobile devices such as notebook personal computers and mobile phones, and polarizers having different transmittance areas are required from the demands for diversification of display purposes, clarification of display divisions, decoration, etc. is becoming In particular, in small and medium-sized portable terminals typified by smart phones and tablet-type terminals, a polarizer may be bonded to the entire display surface in order to have a borderless design over the entire surface from the viewpoint of decorativeness. In this case, since the polarizer may also overlap the area of the camera lens and the area of the icon or logo printed below the screen, there is a problem that the sensitivity of the camera is deteriorated or the designability is inferior.

For example, in Patent Document 1, a dichroic substance low concentration part having a relatively low dichroic substance content is partially provided in a polarizer included in a polarizing plate, and the camera is arranged in correspondence with this dichroic substance low concentration part, so that the camera performance is adversely affected. It is described not to give it.

Patent Document 1: Japanese Patent Laid-Open No. 2015-215609

In patent document 1, the resin film is partially decolorized and the dichroic substance low concentration part is formed by performing the chemical process of making a basic solution contact the resin film containing a dichroic substance. Since the basic solution used for decolorization is treated as a waste liquid, labor and cost are required. Moreover, in patent document 1, when iodine as a dichroic substance is used, it is described that content of iodine can be reduced and a dichroic substance low concentration part can be formed by making a basic solution contact. However, there is no disclosure of a specific method for forming a low concentration portion of a dichroic substance when a dichroic substance other than iodine is used.

An object of the present invention is to provide a polarizer having a retardation layer comprising a novel polarizer, a polarizer composite, and an optical laminate instead of a polarizer in which a region having a low content of a dichroic substance is formed by chemical treatment such as decolorization. .

The present invention provides a polarizer having the following retardation layer, a polarizer composite, and an optical laminate.

[1] A polarizer having a polarizer and a retardation layer having a retardation layer provided on one surface side of the polarizer,

The polarizer has a polarization region having a thickness of 15 μm or less and a non-polarization region surrounded by the polarization region in plan view,

The said non-polarization area|region is the area|region in which the hardened|cured material of active energy ray-curable resin was provided in the through-hole enclosed by the said polarization area|region in planar view, The polarizer which has a retardation layer.

[2] the phase difference layer has a phase difference region having a phase difference characteristic and existing in a region corresponding to the polarization region, and a non-retardation region having no phase difference characteristic and existing in a region corresponding to the non-polarization region;

The non-polarization region and the non-retardation region include a cured product of an active energy ray-curable resin,

The polarizer having the retardation layer according to [1], wherein the specific retardation region is a region in which a cured product of an active energy ray-curable resin is provided in a through hole surrounded by the retardation region in plan view.

[3] The polarizer having the retardation layer according to [2], wherein the thickness of the cured product is the same as the thickness of the laminated structure portion including the polarization region and the retardation region in the polarizer having the retardation layer.

[4] The polarizer having the retardation layer according to [2], wherein a thickness of the cured product is smaller than a thickness of a laminated structure portion including the polarization region and the retardation region in the polarizer having the retardation layer.

[5] The polarizer having the retardation layer according to [2], wherein a thickness of the cured product is larger than a thickness of a laminated structure portion including the polarization region and the retardation region in the polarizer having the retardation layer.

[6] The polarizer having the retardation layer according to any one of [2] to [5], wherein the retardation region is a polymerization cured layer of a polymerizable liquid crystal compound.

[7] The polarizer having the retardation layer according to any one of [1] to [6], wherein the non-polarization region has light transmission properties.

[8] The polarizer having the retardation layer according to any one of [1] to [7], wherein the planar diameter of the non-polarization region is 0.5 mm or more and 20 mm or less.

[9] The polarizer having the retardation layer according to any one of [1] to [8], wherein the active energy ray-curable resin contains an epoxy compound.

[10] The polarizer having the retardation layer according to [9], wherein the epoxy compound contains an alicyclic epoxy compound.

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

The reinforcing material has a plurality of cells arranged so that each open end face faces the face of the polarizer, the polarizer composite.

[12] The polarizer composite according to [11], wherein the shape of the opening of the cell is a polygonal shape, a circular shape, or an elliptical shape.

[13] The polarizer composite according to [12], wherein a light-transmitting filler is provided in the inner space of the cell.

[14] Optical laminate having a protective layer on one side or both sides of the polarizer having the retardation layer according to any one of [1] to [10], or the polarizer composite according to any one of [11] to [13] sifter.

[15] The optical laminate according to [14], wherein the protective layer is a layer of a cured product of an 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 active energy ray-curable resin as the active energy ray-curable resin constituting the cured product contained in the non-polarization region. sifter.

ADVANTAGE OF THE INVENTION According to this invention, the polarizer which has a retardation layer provided with a novel polarizer, a polarizer composite, and an optical laminated body can be provided.

Fig. 1 (a) is a schematic plan view of the polarizer side schematically showing an example of the polarizer having a retardation layer of the present invention, and (b) is a zz' cross-sectional view of the polarizer having a retardation layer shown in (a).
Fig. 2 (a) to (e) are schematic cross-sectional views schematically showing another example of a polarizer having a retardation layer of the present invention.
[FIG. 3] (a) and (b) are views schematically showing an example of a cross section around a non-polarization region and a non-retardation region of a polarizer having a retardation layer, and the thickness of the cured product provided in the non-polarization region and the non-retardation region It is an explanatory diagram for explaining a method of determining .
4(a)-(d) are schematic cross-sectional views which show typically an example of the manufacturing method of the polarizer which has retardation layer of this invention.
5(a) and (b) are schematic cross-sectional views which show typically continuation of the manufacturing method of the polarizer which has retardation layer shown in FIG.
6(a)-(d) are schematic cross-sectional views which show typically another example of the manufacturing method of the polarizer which has retardation layer of this invention.
7(a)-(d) are schematic sectional drawing which shows typically continuation of the manufacturing method of the polarizer which has retardation layer shown in FIG.
Fig. 8 (a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present invention, and (b) is a schematic plan view of the polarizer composite on the reinforcing material side.
It is a schematic sectional drawing which shows typically another example of the polarizer composite of this invention.
Fig. 10 (a) and (b) are schematic cross-sectional views schematically showing an example of the optical laminate of the present invention.
Fig. 11 (a) and (b) are schematic cross-sectional views schematically showing another example of the optical laminate of the present invention.
Fig. 12 (a) and (b) are schematic cross-sectional views schematically showing another example of the optical laminate of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, preferable embodiment of the polarizer which has a retardation layer of this invention, a polarizer composite, and an optical laminated body is demonstrated. In all the drawings below, the scales are appropriately adjusted to facilitate understanding of each component, and the scale of each component shown in the drawings does not necessarily coincide with the scale of the actual component.

<Polarizer having retardation layer>

(Polarizer with retardation layer (1))

Fig. 1 (a) is a schematic plan view of the polarizer side schematically showing an example of a polarizer having a retardation layer of the present embodiment, and Fig. 1 (b) is a polarizer having a retardation layer shown in Fig. 1 (a). is a z-z' cross-section of The polarizer 40 having a retardation layer shown in FIGS. 1A and 1B includes a polarizer 10 and a retardation layer 70 provided on one surface side of the polarizer 10 .

The polarizer 10 which the polarizer 40 which has a retardation layer has has the polarization area|region 11 and the non-polarization area|region 12, as shown to Fig.1 (a). The thickness of the polarization region 11 is 15 µm or less. The non-polarization region 12 is a region surrounded by the polarization region 11 in a plan view of the polarizer 10 . The non-polarization region 12 is a cured product of an active energy ray-curable resin (hereinafter, sometimes referred to as “curable resin (X)”) in the through hole 22 surrounded by the polarization region 11 in plan view. This is an established area.

The thickness of the polarization region 11 may be 15 µm or less, 13 µm or less, 10 µm or less, 8 µm or less, 5 µm or less, and is usually 1 µm or more. When the thickness of the polarization area|region 11 exceeds the said range, workability|operativity for providing the active energy ray-curable resin composition containing curable resin (X) mentioned later in the non-polarization area|region 12 will fall easily. Further, when the polarization region 11 is less than the above range, it becomes difficult to obtain desired optical properties. The thickness of the polarization region 11 can be measured using, for example, a contact-type film thickness measuring device (MS-5C, manufactured by Nikon Corporation).

Arrangement of the polarization area|region 11 in the polarizer 10 and the non-polarization area|region 12 will not be specifically limited if the polarization area|region 11 is provided so that the non-polarization area|region 12 may be enclosed. It is preferable that the total area occupied by the polarization area|region 11 in planar view of the polarizer 10 is larger than the total area which the non-polarization area|region 12 occupies. The polarizer 10 should just have one non-polarization area|region 12, and may have the non-polarization area|region 12 two or more. When having two or more non-polarization regions 12, the shapes of each non-polarization region 12 may be the same as or different from each other.

The retardation layer 70 includes a retardation region having retardation characteristics as a whole. The retardation region refers to a region in which at least one of the in-plane retardation value R0 and the thickness direction retardation value Rth exceeds 40 nm at a wavelength of 590 nm.

The in-plane retardation value R0 is a retardation value in a direction perpendicular to the thickness direction of the retardation layer 70 (in-plane direction), and can be obtained by the following formula (I). The thickness direction retardation value Rth is a retardation value in the thickness direction of the retardation layer 70, and can be calculated|required by following formula (II).

Both the in-plane retardation value R0 and the thickness direction retardation value Rth are measured with light having a wavelength of 590 nm at a temperature of 23°C.

R0=(Nx-Ny)×d(I)

Rth=[{(Nx+Ny)/2}-Nz]×d (II)

[In formulas (I) and (II),

Nx is the refractive index in the direction in which the in-plane refractive index is maximized (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 [nm] of the retardation layer.]

The in-plane retardation value R0 and the thickness direction retardation value Rth can be measured, for example, by a birefringence measuring apparatus (trade name: KOBRA-WPR) manufactured by Oji Keiso Cookies.

The retardation characteristics of the retardation layer 70 are not particularly limited. The retardation layer 70 may have retardation characteristics functioning as, for example, a quarter-wave plate, a half-wave plate, a quarter-wave plate having reverse wavelength dispersion, or a positive C plate.

Although the thickness of the retardation layer 70 is not specifically limited, 30 micrometers or less, 20 micrometers or less may be sufficient, 15 micrometers or less may be sufficient, 13 micrometers or less may be sufficient, 10 micrometers or less may be sufficient, 8 micrometers or less may be sufficient, and 5 micrometers or less It may be less than, and it is 1 micrometer or more normally.

In formation of the retardation layer 70, the raw material retardation layer mentioned later can be used. The retardation layer 70 is, for example, a stretched film obtained by uniaxially stretching or biaxially stretching a thermoplastic resin, or a polymerization cured layer of a polymerizable liquid crystalline compound.

The retardation layer 70 can be provided on one surface side of the polarizer 10 through a bonding layer (not shown). As a bonding layer, an adhesive layer or an adhesive bond layer is mentioned. As an adhesive for forming an adhesive and adhesive bond layer for forming an adhesive layer, the adhesive and adhesive agent used in order to comprise the filler mentioned later, for example are mentioned. The polarizer 40 having a retardation layer may have one layer of retardation layer on one surface side of the polarizer 10, and may have two or more retardation layers. In the case of having two or more retardation layers, the retardation layers may be laminated with each other with a bonding layer interposed therebetween, and the retardation characteristics may be the same as or different from each other.

In the polarizer 40 which has a phase difference layer, as shown to Fig.1 (a), it has the non-polarization area|region 12 surrounded by the polarization area|region 11 in planar view. Therefore, when applying the polarizer 40 having a retardation layer to a display device such as a liquid crystal display device or an organic EL display device deployed on a smart phone or tablet type terminal, etc., it is made to correspond to the non-polarization region 12, and the camera lens , by arranging a printing unit such as an icon or a logo, it is possible to suppress a decrease in the sensitivity of the camera and a decrease in the designability.

In the polarizer 40 with a retardation layer, the through-hole 22 of the polarizer 10 can be made solid because the non-polarization area|region 12 contains the hardened|cured material of curable resin (X). Since the polarizer 10 of the polarizer 40 having a retardation layer has a thickness of 15 µm or less, the cured product of the curable resin (X) is not provided in the non-polarization region 12, and the through hole 22 is hollow. When applied to a display device, there is a risk of causing problems such as cracks in the periphery of the through hole 22 due to the shrinkage of the polarizer according to the temperature change exposed to the display device. On the other hand, as in the polarizer 10 of the polarizer 40 having a retardation layer, the non-polarization region 12 can be made solid by providing the cured product of the curable resin X in the through hole 22 . , it is possible to suppress the occurrence of the above problem.

(Polarizer with retardation layer (2))

2(a)-(e) are schematic cross-sectional views which show typically another example of the polarizer which has a phase difference layer of this embodiment. The polarizer 41 which has a retardation layer shown to Fig.2 (a)-(e) has the polarizer 10 and the retardation layer 71 provided in one surface side of the polarizer 10. About the polarizer 10, it is as having demonstrated above.

The phase difference layer 71 has a phase difference region 75 having a phase difference characteristic and a non-retardation region 76 having no phase difference characteristic, as shown in FIGS. In the retardation region 75, at least one of the in-plane retardation value R0 and the thickness direction retardation value Rth is greater than 40 nm at a wavelength of 590 nm as described for the retardation layer 70 shown in FIG. say area. The specific 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 at a wavelength of 590 nm. Calculation and measurement of in-plane retardation value R0 and thickness direction retardation value Rth can be performed by the above-mentioned method.

In the retardation layer 71 included in the polarizer 41 having the retardation layer, the retardation region 75 is present in the region corresponding to the polarization region 11 of the polarizer 10, and the non-retardation region 76 is It exists in the area|region corresponding to the non-polarization area|region 12 of the polarizer 10. Here, the presence of the phase difference region 75 in the region corresponding to the polarization region 11 means that the phase difference region 75 and the polarization region 11 are substantially the same shape and the same dimension as each other in a planar view. Likewise, the non-phase difference region 76 being in the region corresponding to the non-polarization region 12 means that, in the plan view direction, the non-phase difference region 76 and the non-polarization region 12 are at approximately the same position, It refers to a thing of approximately the same shape and approximately the same size (diameter). In other words, when the non-retardation region 76 is projected onto the polarizer 10 in a planar view, the projection region of the non-retardation region 76 and the non-polarization region 12 in the polarizer 10 are This says about the same thing. According to the manufacturing means of the polarizer which has a retardation layer mentioned later, the polarizer which has a retardation layer which exists in the area|region where the retardation area|region 75 corresponds to the polarization area|region 11 can be manufactured efficiently. When the polarizer 10 included in the polarizer 41 having a retardation layer has two or more non-polarization regions 12 , a non-retardation region 76 is formed in a region corresponding to at least one non-polarization region 12 . What is necessary is just to exist, and the phase difference area|region 75 may exist in the area|region corresponding to the other non-polarization area|region 12.

The retardation layer 71 can be provided on one surface side of the polarizer 10 through a bonding layer (not shown). As a bonding layer, an adhesive layer or an adhesive bond layer is mentioned. The polarizer 41 having a retardation layer may have one layer of retardation layers on one surface side of the polarizer 10, and may have two or more retardation layers. In the case of having two or more retardation layers, the retardation layers may be laminated with each other with a bonding layer interposed therebetween, and the retardation characteristics may be the same as or different from each other. In the case of having two or more retardation layers, if at least one layer is the retardation layer 71 , the other retardation layer may be, for example, the retardation layer 70 described above. In this case, the retardation layer 71 is preferably provided on the side relatively close to the polarizer 10 .

The non-polarization area|region 12 and the non-retardation area|region 76 of the polarizer 41 which have a retardation layer contain the hardened|cured material of curable resin (X). The non-polarization area|region 12 is the area|region in which the hardened|cured material of curable resin (X) was provided in the through-hole 22 surrounded by the polarization area|region 11 in planar view. The non-retardation region 76 is surrounded by the retardation region 75 in plan view, and the cured product of the curable resin (X) is provided in the through-hole 72 provided in the region corresponding to the above-described through-hole 22 . It is an established area. The through-hole 22 of the polarizer 10 and the through-hole 72 of the retardation layer 71 can be made into the same shape in planar view. The through hole 22 and the through hole 72 may communicate in the thickness direction of the polarization region 11, and a cured product of the curable resin (X) is passed through the communicating through holes 22 and 72. can be provided

Also in the polarizer 41 having a retardation layer, similarly to the polarizer 40 having a retardation layer shown in FIG. 1 , when applied to a display device, a decrease in camera sensitivity and a decrease in designability can be suppressed, and the above It can suppress the occurrence of problems. In particular, in the polarizer 41 having a retardation layer, the retardation layer 71 has a non-retardation region 76 . Therefore, by making it correspond to the non-polarization area|region 12 and the non-phase difference area|region 76, and arranging printing parts, such as a camera lens, an icon, or a logo, the fall of the sensitivity of a camera and the fall of designability can be suppressed further.

The thickness of the cured product of the curable resin (X) provided in the polarizer 41 having a retardation layer is a layered structure part including the polarization region 11 and the retardation region 75 in the polarizer 41 having a retardation layer may be the same as the thickness of (FIG. 2(a)), may be smaller than the thickness of the laminated structure part (FIG. 2(b), (c)), or may be greater than the thickness of the laminated structure part (FIG. 2) of (d), (e)). The thickness of the layered structure portion may be the total thickness of the thickness of the polarization region 11 and the thickness of the retardation region 75, and the total thickness of the layer interposed between the polarization region 11 and the retardation region 75 Thickness may be included. For example, when the polarizer 41 having a retardation layer has a bonding layer between the polarizer 10 and the retardation layer 71 , the thickness of the layered structure portion is the thickness of the polarization region 11 and the retardation region 75 . ), the thickness of the bonding layer is also added to the total thickness of the thicknesses. The cured product of the curable resin (X) provided in the polarizer 41 having a retardation layer fills 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 . It would be nice to have a catalog. When the polarizer 41 having a retardation layer has a bonding layer between the polarizer 10 and the retardation layer 71, a cured product of the curable resin (X) is provided to fill at least a part of the through hole provided in the bonding layer. good to have The cured product of the curable resin (X) is preferably provided so as to fill the entire through hole 22 of the polarizer 10 , the entire through hole 22 of the polarizer 10 and the through hole of the retardation layer 71 . (72) It is more preferable to provide so as to fill the whole and the whole through hole of the bonding layer.

The thickness of the laminated structure portion including the polarization region 11 and the retardation region 75 in the polarizer 41 having a retardation layer is preferably 30 µm or less, more preferably 25 µm or less, and 20 µm or less It is more preferable, and 18 micrometers or less may be sufficient, 16 micrometers or less may be sufficient, and it is 2 micrometers or more normally. When the thickness of the said laminated structure part exceeds the said range, as mentioned later, workability|operativity for providing the hardened|cured material of curable resin (X) in the non-polarization area|region 12 and the non-retardation area|region 76 will fall easily. The thickness can be measured using, for example, a contact-type film thickness measuring device (MS-5C, manufactured by Nikon Corporation).

The thickness of the hardened|cured material provided in the polarizer 41 which has retardation layer is determined as follows. First, in the polarizer 41 having a retardation layer, a first plane including the surface of the polarization region 11 of the polarizer 10 (the surface opposite to the retardation layer 71 side), and the retardation layer 71 ) of the phase difference region 75 (a surface on the opposite side to the polarizer 10 side) is assumed. Next, in the non-polarization area|region 12, the 1st position and the phase difference layer 71 side which are a position where the shortest distance which the surface of the hardened|cured material and 1st plane make in the polarizer 10 side becomes the largest. The second position at which the shortest distance between the surface of the cured product and the second plane is maximized is determined. Then, the sum of the shortest distance (dm) at the first position, the shortest distance (dn) at the second position, and the distance (D) between the first plane and the second plane (dm+dn+D) , let it be the thickness of the hardened|cured material provided in the polarizer 41 which has a retardation layer.

The thickness of the hardened|cured material provided in the non-polarization area|region 12 and the non-retardation area|region 76, and the thickness of the laminated structure part containing the polarization area|region 11 and the retardation area|region 75 in the polarizer 41 which has a retardation layer. A method of determining the thickness in the case where n is different will be specifically described with reference to FIG. 3 . 3 (a) and (b) are diagrams schematically showing an example of a cross section around a non-polarization region and a non-retardation region of a polarizer having a retardation layer, the thickness of the cured product provided in the non-polarization region and the non-retardation region It is an explanatory diagram for explaining the determination method.

As shown to Fig.3 (a), when hardened|cured material is provided in the non-polarization area|region 12 and the non-retardation area|region 76, along the surface side on the opposite side to the retardation layer 71 side of the polarizer 10 It is assumed that the straight line in the non-polarization region 12 is the first plane 11m. The length of the straight line (FIG. 3(a) ) in which "dm") becomes the maximum, let the position be the 1st position. Next, as shown in FIG. 3A , a straight line indicated by a dashed-dotted line in the non-retardation region 76 along the surface side of the retardation layer 71 on the opposite side to the polarizer 10 side is the second plane. (11n) is assumed. Among the straight lines that are the shortest distance, the straight line connecting any point on the second plane 11n and any point on the surface of the cured product provided in the non-phase difference region 76 is the length of the straight line (Fig. 3(a)). ), the position at which "dn") becomes the maximum is set as the second position. Here, as shown to Fig.3 (a), the surface of the hardened|cured material provided in the non-polarization area|region 12 and the non-retardation area|region 76 is the thickness direction of the polarizer 41 which has a retardation layer. WHEREIN: When it exists on the inner surface side (polarizer 10 and retardation layer 71 side) rather than the plane 11m and the 2nd plane 11n, dm and dn shall represent as negative values. In addition, the distance (corresponding to the thickness of a laminated structure part) between the 1st plane 11m and the 2nd plane 11n is D. Then, the thickness of the hardened|cured material provided in the non-polarization area|region 12 and the non-retardation area|region 76 shown to Fig.3 (a) can be determined as D+dm+dn (dm and dn are negative values).

Moreover, as above, also about the case where hardened|cured material is provided in the non-polarization area|region 12 and the non-retardation area|region 76 as shown to FIG.3(b), the 1st plane 11m and the 2nd plane 11n 11m ), the thickness of the cured product provided in the non-polarization region 12 and the phase difference region 76 can be determined. Specifically, first, among the straight lines connecting any point on the first plane 11m and any point on the surface of the cured product provided in the non-polarization region 12 to the shortest distance, the length of the straight line ( The position when "dm") in FIG.3(b) becomes the maximum is made into a 1st position. Next, among the straight lines connecting any point on the second plane 11n and any point on the surface of the cured product provided in the non-phase difference region 76, the length of the straight line (in FIG. 3 ) is the shortest straight line. In (b), the position when "dn") becomes the maximum is made into a 2nd position. Here, as shown in FIG.3(b), the surface of the hardened|cured material provided in the non-polarization area|region 12 and the non-retardation area|region 76 WHEREIN: 1st in the thickness direction of the polarizer 41 which has a phase difference layer. When it exists on the outer surface side (the side opposite to the polarizer 10 and retardation layer 71 side) rather than the plane 11m and the 2nd plane 11n, dm and dn shall be shown as positive values. Then, the thickness of the hardened|cured material provided in the non-polarization area|region 12 and the non-retardation area|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 having a retardation layer may be a circularly polarizing plate. In this case, the retardation region 75 of the retardation layer 70 and the retardation layer 71 may have retardation characteristics functioning as a quarter wave plate. When the polarizers 40 and 41 having a retardation layer are a circularly polarizing plate, two or more layers of the retardation layers 70 and 71 may be provided on one surface side of the polarizer 10 . For example, on one surface side of the polarizer 10, the retardation characteristics are [a] the order of the 1/2 wave plate and the 1/4 wave plate, [b] the reverse wavelength dispersion property of the 1/4 wave plate and the positive C plate , or [c] The retardation layers 70 and 71 may be stacked so as to be arranged in the order of the positive C plate and the quarter-wavelength plate having reverse wavelength dispersion.

The polarizer 40 having a retardation layer may be a sheet body, or an elongate body having a length that is wound up at the time of storage, transport, etc. to form a roll shape may be sufficient as it. The planar shape and size of the polarizer 40 having a retardation layer are not particularly limited.

(polarization 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 a property of absorbing linearly polarized light having an oscillation plane parallel to its absorption axis and transmitting linearly polarized light having an oscillation plane orthogonal to the absorption axis (parallel to the transmission axis). It can be obtained by area (11).

The polarization region 11 is, for example, in a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene/vinyl acetate copolymer-based partially saponified film, and a dichroic substance such as iodine or a dichroic dye. This adsorption/orientation; What the dichroic substance adsorbed and orientated to the thing which orientated the polyene-type oriented film or liquid crystal compound, such as a dehydration-treated product of polyvinyl alcohol and a dehydrochloric acid-treated product of polyvinyl chloride; etc. can be used. Especially, it is preferable to use the thing obtained by dyeing a polyvinyl alcohol-type film with iodine and uniaxially stretching as a thing excellent in an optical characteristic.

First, the manufacturing method of the polyvinyl alcohol-type film used as the preferable polarization area|region 11 is briefly demonstrated about the thing obtained by dyeing|staining with iodine and uniaxially stretching.

Dyeing with iodine is performed by, for example, immersing a polyvinyl alcohol-based film in an aqueous iodine solution. It is preferable that the draw ratio of uniaxial stretching is 3 to 7 times. Extending|stretching may be performed after a dyeing process, and may be performed, dyeing|staining. Moreover, you may dye|dye after extending|stretching.

A swelling process, a crosslinking process, a washing process, a drying process, etc. are given to a polyvinyl alcohol-type film as needed. For example, by immersing the polyvinyl alcohol-based film in water and washing with water before dyeing, it is possible to not only wash dirt and anti-blocking agents on the surface of the polyvinyl alcohol-based film, but also swell the polyvinyl alcohol-based film to prevent staining, etc. can do.

Stretching treatment, dyeing treatment, crosslinking treatment (boric acid treatment), water washing treatment, and drying treatment of the polyvinyl alcohol-based resin film may be performed according to, for example, the method described in JP 2012-159778 A . In the method described in this document, the polyvinyl alcohol-type resin layer used as the polarization area|region 11 is formed by coating of the polyvinyl alcohol-type resin to a base film. At this time, the used base film can also be used as the 1st support layer 25 mentioned later.

Next, the polarization region 11 formed by adsorbing and aligning a dichroic dye to a liquid crystal compound is briefly described. As the polarization region 11 in this case, for example, Japanese Patent Application Laid-Open No. 2013-37353, Japanese Patent Application Laid-Open No. 2013-33249, Japanese Patent Application Laid-Open No. 2016-170368, and Japanese Patent Application Laid-Open No. 2017-83843 As described, in the cured film in which the liquid crystal compound is superposed, a dichroic dye may be oriented. As a dichroic dye, what has absorption within the range of wavelength 380-800 nm can be used, It is preferable to use organic dye. As a dichroic dye, an azo compound is mentioned, for example. A liquid crystal compound is a liquid crystal compound which can superpose|polymerize with orientation, and may have a polymeric group in a molecule|numerator. The cured film in which such a liquid crystal compound superposed|polymerized may be formed on the base film, and in that case, the said base film can also be used as the 1st support layer 25 mentioned later.

After making it above and producing the polarizing film used for the polarization area|region 11, it is also preferable to form the non-polarization area|region 12 by a drilling process, and to form the polarizer 10. In this specification, the polarizing film formed only with such a polarization area|region 11 may be called the raw material polarizer 20.

The visibility correction polarization degree Py of the polarization 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 single transmittance (Ts) of the polarization region 11 is usually less than 50%, and may be 46% or less. The single transmittance (Ts) of the polarization region 11 is preferably 39% or more, more preferably 39.5% or more, still more preferably 40% or more, and particularly preferably 40.5% or more.

The single transmittance (Ts) is the Y value which measured based on the 2 degree field of view (C light source) of JIS Z8701, and performed the visibility correction|amendment. Visibility correction polarization degree (Py) and single transmittance (Ts) can be measured using, for example, an ultraviolet and visible spectrophotometer (manufactured by Nippon Bunko Co., Ltd., product name: V7100), parallel transmittance (Tp) having corrected visibility And it is calculated|required by the following formula based on the orthogonal transmittance|permeability (Tc).

Py[%]={(Tp-Tc)/(Tp+Tc)} ^1/2 × 100

(non-polarization area)

Generally, "non-polarization" refers to light having no observable regularity in an electric field component. In other words, unpolarized light is random light in which an excellent specific polarization state is not observed. In addition, "partially polarized light" refers to light in an intermediate state between polarized light and non-polarized light, and refers to light in which at least one of linearly polarized light, circularly polarized light, and elliptically polarized light and non-polarized light are mixed. The non-polarization area|region 12 in the polarizer 10 means that the light (transmission light) which permeate|transmits the said non-polarization area|region 12 becomes non-polarization|polarized-light or partially polarized light. In particular, a non-polarization region in which transmitted light is non-polarization is preferable.

The non-polarization region 12 of the polarizer 10 is a region surrounded by the polarization region 11 in plan view. The non-polarization area|region 12 contains the hardened|cured material of curable resin (X). The non-polarization region 12 is a through hole provided in the polarizer (raw material polarizer 20) formed only in the polarization region 11. A cured product of an active energy ray-curable resin composition containing a curable resin (X) described later is provided. it is preferable The non-polarization region 12 has light-transmitting properties. In the present specification, light transmittance refers to a property (transmittance) that transmits 80% or more of visible light in a wavelength range of 400 nm to 700 nm, preferably transmits 85% or more, more preferably transmits 90% or more, 92 % or more is more preferable. The definition of "transmittance" below and the preferable range of the transmittance|permeability with respect to visible light are also the same as the above.

When the non-polarization area|region 12 of the polarizer 10 has translucency, optical transparency can be ensured in the non-polarization area|region 12. Accordingly, when the polarizers 40 and 41 having a retardation layer are applied to the display device, the camera lens, icon, or logo is arranged in correspondence with the non-polarization region 12, thereby reducing the sensitivity of the camera or A decrease in designability can be suppressed.

Although the planar shape of the non-polarization area|region 12 is not specifically limited, Circle; oval; Jang Won-Hyeong; polygons such as triangles or squares; At least one angle of the polygon may be a rectangular ring polygon or the like in which a rectangular ring (a shape having a rounding shape) is formed.

It is preferable that the diameter of the non-polarization area|region 12 is 0.5 mm or more, 1 mm or more may be sufficient as it, 2 mm or more may be sufficient, and 3 mm or more may be sufficient as it. It is preferable that the diameter of the non-polarization area|region 12 is 20 mm or less, 15 mm or less may be sufficient, 10 mm or less may be sufficient, and 7 mm or less may be sufficient as it. The diameter of the non-polarization area|region 12 means the length in the longest straight line among the straight lines which connect arbitrary two points of the outer periphery of the said non-polarization area|region 12.

The thickness of the hardened|cured material of curable resin (X) provided in the non-polarization area|region 12 may be the same as the thickness of the polarization area|region 11, and may be smaller than the thickness of the polarization area|region 11, The thickness of the polarization area|region 11 may be bigger than As mentioned above, it is preferable to provide so that the hardened|cured material of curable resin (X) provided in the non-polarization area|region 12 may fill the through hole 22 whole.

What is necessary is just to perform the thickness of the hardened|cured material provided in the non-polarization area|region 12 according to the measuring method of the thickness of the hardened|cured material provided in the polarizer 41 which has retardation layer demonstrated above. Specifically, in the measurement method, the second plane is the surface of the polarization region 11 of the polarizer 10 on the opposite side to the surface included in the first plane, and the curable resin (X) What is necessary is to determine the thickness of the cured product.

(phase difference area)

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

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

The retardation region 75 can be a region formed of a raw material retardation layer, which is a retardation region as a whole, which will be described later. In the case where a plurality of types of stacked retardation layers having mutually different retardation characteristics are used as the retardation region 75, a material obtained by stacking a plurality of kinds of retardation layers may be used as a raw material retardation layer. Therefore, the retardation region 75 is formed of a material constituting a raw material retardation layer to be described later, and specifically may contain a thermoplastic resin. The retardation region can be formed by, for example, a stretched film obtained by uniaxially stretching or biaxially stretching a thermoplastic resin, or a polymerization cured layer of a polymerizable liquid crystalline compound.

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

(non-phase difference region)

The non-retardation region 76 of the retardation layer 71 is a region surrounded by the retardation region 75 in plan view. The in-plane retardation value R0 and the thickness direction retardation value Rth at a wavelength of 590 nm in the specific retardation region 76 are 40 nm or less, and each independently may be 35 nm or less, or 30 nm or less. , 20 nm or less may be sufficient, and 0 nm may be sufficient as it.

The non-retardation area|region 76 may contain the hardened|cured material of the curable resin (X) in the through-hole 72 surrounded by the retardation area|region 75 in planar view. The thickness of the cured product of the curable resin (X) provided in the non-retardation region 76 may be the same as the thickness of the retardation region 75 or may be smaller than the thickness of the non-retardation region 76, and the specific retardation region 76 may be greater than the thickness of As mentioned above, it is preferable that the hardened|cured material of the curable resin (X) provided in the non-retardation area|region 76 may be provided so that the whole through hole 72 may be filled. As will be described later, when the non-polarization region 76 is provided so as to correspond to the non-polarization region 12, when the polarizers 40 and 41 having a phase difference layer are applied to a display device, the non-polarization region 12 And by arranging a printing unit such as a camera lens, an icon, or a logo in correspondence with the non-phase difference region 76 , it is possible to suppress a decrease in the sensitivity of the camera or a decrease in the designability.

What is necessary is just to carry out the thickness of the hardened|cured material provided in the specific retardation area|region 76 according to the measuring method of the thickness of the hardened|cured material provided in the polarizer 41 which has retardation layer demonstrated above. Specifically, in the above measurement method, the first plane is the surface of the retardation region 75 of the retardation layer 71 on the opposite side to the surface included in the second plane, and the curable resin (X ) to determine the thickness of the cured product.

The planar shape and diameter of the non-phase difference area|region 76 are not specifically limited, The shape and diameter illustrated as a planar shape of the non-polarization area|region 12 are mentioned. It is preferable that the planar shape and diameter of the non-retardation area|region 76 are the same as the planar shape and diameter of the non-polarization area|region 12, respectively.

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

As described above, the non-polarization region 12 and the non-polarization region 76 in the polarizer 41 having the phase difference layer and the non-polarization region 12 in the polarizer 40 having a retardation layer have active energy An area in which a cured product of a ray-curable resin (curable resin (X)) is provided, preferably an active energy ray-curable resin composition (hereinafter referred to as “curable resin composition”) containing the curable resin (X). ) is formed by Curable resin (X) contained in curable resin composition hardens|cures by irradiation of active energy rays, such as an ultraviolet-ray, a visible light, an electron beam, and X-ray. It is preferable that curable resin (X) is ultraviolet curable resin hardened|cured by irradiation of an ultraviolet-ray. An active energy ray hardening-type adhesive agent may be sufficient as curable resin composition containing curable resin (X), and in this case, it is more preferable that it is an ultraviolet curable adhesive agent.

It is preferable that curable resin composition is a solvent-free type. The solvent-free type means that a solvent is not actively added, and specifically, the solvent-free type curable resin composition has a solvent content of 5 weight with respect to 100 weight% of the curable resin (X) contained in the curable resin composition. % or less.

It is preferable that curable resin (X) contains an epoxy compound. An epoxy compound is one or more in a molecule|numerator, Preferably it is a compound which has two or more epoxy groups. As an epoxy compound, an alicyclic epoxy compound, an aliphatic epoxy compound, a hydrogenated epoxy compound (glycidyl ether of the polyol which has an alicyclic ring), etc. are mentioned. One type may be sufficient as the epoxy compound contained in curable resin (X), and 2 or more types may be sufficient as it.

It is preferable that content of an epoxy compound is 40 weight% or more with respect to 100 weight% of curable resin (X), It is more preferable that it is 50 weight% or more, It is still more preferable that it is 60 weight% or more. Content of an epoxy compound may just be 100 weight% or less with respect to 100 weight% of curable resin (X), 90 weight% or less may be sufficient, and 80 weight% or less may be sufficient and 75 weight% or less may be sufficient.

The epoxy equivalent of an epoxy compound is 40-3000 g/equivalent normally, Preferably it exists in the range of 50-1500 g/equivalent. When an epoxy equivalent exceeds 3000 g/equivalent, compatibility with the other component contained in curable resin (X) may fall.

It is preferable that the epoxy compound contained in curable resin (X) contains an alicyclic epoxy compound. An alicyclic epoxy compound is an epoxy compound which has one or more epoxy groups couple|bonded with the alicyclic in a molecule|numerator. "The epoxy group couple|bonded with the alicyclic" means the oxygen atom -O- of bridge|crosslinking in the structure shown by the following formula. In the following formula, m is an integer of 2 to 5.

The compound in which the group of the form in which one or several hydrogen atoms were removed among (CH2) _m in the said formula is _couple |bonded with another chemical structure can become an alicyclic epoxy compound. One or more hydrogen atoms in (CH ₂ ) _m may be suitably substituted with a linear alkyl group such as a methyl group or an ethyl group. Among the alicyclic epoxy compounds, the epoxy compound which has an oxabicyclohexane ring (the thing of m=3 in the said formula) and an oxabicycloheptane ring (the thing of m=4 in the said formula) is a polarizer (10) Provides excellent adhesion between the polarization region 11 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 Therefore, it is preferably used. Although the alicyclic epoxy compound used preferably is specifically illustrated below, it is not limited to these compounds.

[a] Epoxycyclohexylmethyl epoxycyclohexanecarboxylates represented by the following formula (IV):

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

[b] Epoxycyclohexanecarboxylates of alkanediol represented by the following formula (V):

[In formula (V), R ¹⁰ and R ¹¹ each 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] Epoxycyclohexylmethyl esters of dicarboxylic acids represented by the following formula (VI):

[In formula (VI), R ¹² and R ¹³ each 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] Epoxycyclohexylmethyl ethers of polyethylene glycol represented by the following formula (VII):

[In formula (VII), R ¹⁴ and R ¹⁵ each 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] Epoxycyclohexylmethyl ethers of alkanediol represented by the following formula (VIII):

[In formula (VIII), R ¹⁶ and R ¹⁷ each 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] a diepoxytrispiro compound represented by the following formula (IX):

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

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

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

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

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

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

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

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

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

As an aliphatic epoxy compound, the polyglycidyl ether of an aliphatic polyhydric alcohol or its alkylene oxide adduct is mentioned. More specifically, diglycidyl ether of 1,4-butanediol; diglycidyl ether of 1,6-hexanediol; triglycidyl ether of glycerin; triglycidyl ether of trimethylolpropane; diglycidyl ether of polyethylene glycol; diglycidyl ether of propylene glycol; and polyglycidyl ethers of polyether polyols obtained by adding one or more alkylene oxides (ethylene oxide or propylene oxide) to an aliphatic polyhydric alcohol such as ethylene glycol, propylene glycol or glycerin.

A hydrogenated epoxy compound is obtained by making epichlorohydrin react with the alicyclic polyol obtained by performing a hydrogenation reaction on the aromatic ring of an aromatic polyol. As an aromatic polyol, Bisphenol type compounds, such as bisphenol A, bisphenol F, and bisphenol S; novolak resins such as phenol novolak resin, cresol novolak resin, and hydroxybenzaldehyde phenol novolak resin; and polyfunctional compounds such as tetrahydroxydiphenylmethane, tetrahydroxybenzophenone and polyvinylphenol. As a preferable thing among a hydrogenation epoxy compound, the diglycidyl ether of hydrogenated bisphenol A is mentioned.

Curable resin (X) may contain a (meth)acrylic-type compound etc. with active energy ray-curable compounds, such as an epoxy compound. By using the (meth)acrylic compound together, the polarization region 11 of the polarizer 10 and the retardation region 75 of the retardation layer 71, and the non-polarization region 12 and the non-retardation region 76 are formed. The effect of increasing the adhesiveness between the cured products of the resin (X), the hardness and the mechanical strength of the cured product of the curable resin (X) can be expected, and the adjustment of the viscosity and the curing rate of the curable resin (X) can be made more easily be able to do "(meth)acryl" means at least one selected from the group which consists of acryl and methacryl.

It is preferable that curable resin composition containing curable resin (X) contains a polymerization initiator. As a polymerization initiator, cationic polymerization initiators, such as a photocationic polymerization agent, and a radical polymerization initiator are mentioned. The photocationic polymerization initiator generates cationic species or Lewis acid by irradiation with active energy rays such as visible rays, ultraviolet rays, X-rays, and electron beams, and initiates the polymerization reaction of the epoxy group. As described above, the curable resin (X) is preferably an ultraviolet curable resin that is cured by irradiation with ultraviolet rays, and the curable resin (X) preferably contains an alicyclic epoxy compound. Therefore, the polymerization initiator in this case is , it is preferable to generate a cationic species or a Lewis acid by irradiation with ultraviolet rays.

The curable resin composition further contains additives such as a photosensitizer, a polymerization accelerator, an ion trapping agent, an antioxidant, a chain transfer agent, a tackifier, a thermoplastic resin, a filler, a flow regulator, a plasticizer, an antifoaming agent, an antistatic agent, a leveling agent can do.

(Manufacturing method of polarizer 1 having retardation layer)

4 and 5 are schematic cross-sectional views schematically showing an example of a manufacturing method of a polarizer having a retardation layer of the present embodiment. In FIG.4 and FIG.5, the case where the polarizer 40 which has the retardation layer shown in FIG. 1 is obtained is shown. The polarizer 40 with a retardation layer can be manufactured using the raw material polarizer 20 which has the same visibility correction|amendment polarization degree Py and does not have the non-polarization area|region 12, for example. Since the raw polarizer 20 is formed only in the polarization region 11 of the polarizer 10 described above, the thickness of the raw polarizer 20 is 15 μm or less, which is the same thickness as the polarization region 11 of the polarizer 10. it is preferable

The polarizer 40 having a retardation layer can be manufactured, for example, by the following process. First, as shown in Fig. 4(a), on one surface of the raw material polarizer 20, the first laminate 31 provided with the first support layer 25 so as to be peelable with respect to the raw material polarizer 20. Prepare. With respect to the prepared first laminate 31, a through hole 32 penetrating in the lamination direction is formed by punching, clipping, cutting, or laser cutting (FIG. 4(b)). Thereby, the hole polarizer 21 in which the through hole 22 was formed in the raw material polarizer 20 is obtained. Next, after providing the second support layer 26 so as to be peelable on the side of the perforated polarizer 21 of the first laminate 31 in which the through hole 32 is formed (FIG. 4(c)), the first support layer 25 ) is peeled (FIG. 4(d)). Thereby, the 2nd laminated body 33 in which the 2nd support layer 26 and the hole polarizer 21 were laminated|stacked is obtained (FIG.4(d)). The second support layer 26 is provided so as to block one side of the through hole 22 of the drilling polarizer 21 .

Next, the through hole 22 of the perforated polarizer 21 of the second laminate 33 is filled with a curable resin composition containing the curable resin (X) and irradiated with an active energy ray, whereby the through hole 22 is Curable resin (X) inside is hardened. Thereby, the hardened|cured material of curable resin (X) is formed in the through hole 22 of the perforated polarizer 21, and the 3rd laminated body 34 in which the polarizer 10 was laminated|stacked on the 2nd support layer 26 was formed. obtained (FIG. 5(a)). In the polarizer 10 of the third laminate 34, the region other than the through hole 22 of the drilled polarizer 21 becomes the polarization region 11, and the region of the through hole 22 in which the cured product is provided is not a polarization region 12 . And the phase difference layer 70 is laminated|stacked on the polarizer 10 side of the 3rd laminated body 34 through a bonding layer not shown in figure, and the polarizer 40 which has a phase difference layer is formed. After laminating the retardation layer 70 , the second supporting layer 26 may be peeled off.

It does not specifically limit as a method of filling the curable resin composition in the through hole 22 of the drilling polarizer 21. For example, the curable resin composition may be injected into the through hole 22 of the perforated polarizer 21 of the second laminate 33 using a dispenser or dispenser, or the perforated polarizer of the second laminate 33 ( You may fill the curable resin composition in the through hole 22 of the perforated polarizer 21, coating curable resin composition on the surface of 21). The cured product layer of the curable resin composition coated on the surface of the perforated polarizer 21 can be a protective layer to be described later. When coating curable resin composition, you may provide a base film so that the coating layer surface formed by coating may be covered. A base film may be used as a protective layer mentioned later, and in this case, the hardened|cured material layer of curable resin (X) is good also as a bonding layer for bonding the protective layer mentioned later. You may peel a base film after hardening of curable resin (X) contained in curable resin composition.

The support layer used at the time of manufacture of the raw material polarizer 20 may be sufficient as the 1st support layer 25, and the said base film used when coating curable resin composition may be used for it. Alternatively, a peelable support layer bonded to the raw material polarizer 20 with a volatile liquid such as water may be sufficient, or a peelable adhesive sheet may be used with respect to the raw material polarizer 20 . The peelable support layer bonded to the hole polarizer 21 with volatile liquids, such as water, may be sufficient as the 2nd support layer 26, and the adhesive sheet which can peel with respect to the hole polarizer 21 may be sufficient as it.

By providing the retardation layer 70 in the polarizer 10 in which the non-polarization area|region 12 was provided, the polarizer 40 which has a retardation layer shown in FIG.1(b) can be manufactured. The retardation layer 70 may be a stretched film obtained by uniaxially stretching or biaxially stretching a thermoplastic resin, or may be a polymerization cured layer of a polymerizable liquid crystalline compound. When the retardation layer 70 is a polymerization cured layer, a polymerization cured layer having a substrate layer in which a polymerization cured layer is formed by polymerization and curing a polymerizable liquid crystal compound on a substrate layer may be used. After laminating the polymerization cured layer side of the polymerization cured layer having this base material layer on the polarizer 10 side of the third laminate 34 with a bonding layer interposed therebetween, by peeling the base material layer, on the polarizer 10 The retardation layer 70 may be formed.

As described above, when the thickness of the raw material polarizer 20 is 15 µm or less, the depth of the through hole 22 provided in the perforated polarizer 21 can also be 15 µm or less. Thereby, the filling of the curable resin composition into the through hole 22 of the perforated polarizer 21 and the curing treatment of the curable resin (X) contained in the curable resin composition filled in the through hole 22 can be performed in a short time. For this reason, the fall of workability|operativity can be suppressed.

(Manufacturing method of polarizer 2 having retardation layer)

6 and 7 are schematic cross-sectional views schematically showing an example of a method for manufacturing a polarizer having a retardation layer of the present embodiment. Although the case where the polarizer 41 which has a retardation layer shown in FIG.2(a) is obtained is shown in FIG.6 and FIG.7, the polarizer 41 which has a retardation layer shown to FIG.2(c) and (e) Also, it can be manufactured by the method described below. The polarizer 41 having a retardation layer uses, for example, the raw material polarizer 20 (FIG. 6(a)) which has the same visibility correction polarization degree Py and does not have the non-polarization region 12, , it can also be produced by using the polymerization cured layer 85 (FIG. 6(b)) of the entire retardation region as the raw material retardation layer. Since the raw polarizer 20 becomes the polarization region 11 of the polarizer 10 described above, the thickness of the raw polarizer 20 is preferably 15 μm or less, which is the same thickness as the polarization region 11 of the polarizer 10 . do. Since the polymerization cured layer 85 becomes the retardation region 75 of the retardation layer 71 described above, the thickness of the polymerization cured layer 85 is the same thickness as the retardation region 75 of the retardation layer 71. desirable.

The polarizer 41 having a retardation layer can be manufactured, for example, by the following process. First, in the procedure described in the method for manufacturing the polarizer 40 having a retardation layer, the first laminate 31 is prepared (FIG. 6(a)). A polymerizable liquid crystal compound is polymerized and cured on the substrate layer 84 to prepare a polymerization cured layer 80 having a substrate layer in which a polymerization cured layer 85, which is the entire retardation region, is formed on the substrate layer 84 ( 6 (b)). A bonding layer (not shown) is interposed on the raw material polarizer 20 side of the prepared first laminate 31, and the polymerization cured layer 85 side of the polymerization cured layer 80 having a base layer is laminated (FIG. 6). of (c)). Thereby, the 4th laminated body 35 in which the base material layer 84, the polymerization hardening layer 85, the raw material polarizer 20, and the 1st support layer 25 were laminated|stacked in this order is obtained (FIG.6(c)) ). With respect to the fourth laminate 35, through holes 36 (including through holes 22 and 72) penetrating in the lamination direction are formed by punching, clipping, cutting, laser cutting, or the like (in FIG. 6 ). (d)), the 1st support layer 25 is peeled, and the 5th laminated body 37 is obtained (FIG.7(a)). Thereby, the punched polarizer 21 in which the through-hole 22 was formed in the raw material polarizer 20, and the punched retardation layer 81 in which the through-hole 72 was formed in the polymerization cured layer 85 are obtained.

Next, the 3rd support layer 27 is laminated|stacked on the hole polarizer 21 side of the 5th laminated body 37 (FIG. 7(b)), and the base material layer 84 is peeled (FIG. 7(c)) ). The third support layer 27 is provided so as to block one side of the through hole 22 of the drilling polarizer 21 . Thereafter, the through hole 22 of the perforated polarizer 21 and the through hole 72 of the perforated retardation layer 81 are filled with a curable resin composition containing the curable resin (X) and irradiated with active energy rays, The curable resin (X) in the through holes 22 and 72 is cured, and the cured product of the curable resin (X) is formed in the through hole 22 of the perforated polarizer 21 and the through hole 72 of the perforated retardation layer 81 . to form (Fig. 7 (d)). Thereby, the polarizer 41 which has a retardation layer on the 3rd support layer 27 is obtained. As for the polarizer 41 having a retardation layer, the polarizer 10 and the retardation layer 71 are laminated|stacked on the 3rd support layer 27 in this order. After forming the cured product, the third support layer 27 may be peeled off. As for the obtained polarizer 10, the area|region other than the through-hole 22 of the drilling polarizer 21 becomes the polarization area|region 11, and the area|region of the through-hole 22 in which the hardened|cured material was provided becomes the non-polarization area|region 12, have. In the obtained retardation layer 71, the region other than the through hole 72 of the perforated retardation layer 81 becomes the retardation region 75, and the region of the through hole 72 in which the cured product is provided is the non-retardation region 76 is made of And the non-polarization area|region 12 in the polarizer 10 and the non-retardation area|region 76 in the retardation layer 71 communicate with each other.

Instead of the above method, the polarizer 41 having the retardation layer shown in Fig. 2A may be manufactured, for example, as follows. In the following, the case of obtaining the polarizer 41 having a retardation layer shown in Fig. 2(a) is shown, but the polarizer 41 having a retardation layer shown in Figs. It can be manufactured by the method described. 6(c) and 6(d), after forming a through hole 36 penetrating in the lamination direction by punching, clipping, cutting, laser cutting, or the like, in the fourth laminated body 35 , the base layer 84 is peeled off. Next, the 4th support layer is laminated|stacked on the side (perforated retardation layer 81 side) exposed by peeling the base material layer 84, and the 1st support layer 25 is peeled. The fourth support layer is provided so as to block one side of the through hole 72 of the perforated retardation layer 81 . Then, the through hole 22 of the drilling polarizer 21 and the through hole 72 of the drilling retardation layer 81 are filled with a curable resin composition, and by irradiating an active energy ray, the inside of the through holes 22 and 72 The curable resin (X) contained in the curable resin composition is cured to form a cured product of the curable resin (X) in the through-holes 22 of the perforated polarizer 21 and the through-holes 72 of the perforated retardation layer 81 do. Thereby, the polarizer 41 which has a retardation layer on a 4th support layer is obtained. As for the polarizer 41 which has a retardation layer, the retardation layer 71 and the polarizer 10 are laminated|stacked in this order on a 4th support layer. After forming the cured product, the fourth supporting layer may be peeled off.

As a method of filling the through-holes 22 of the perforated polarizer 21 and the through-holes 72 of the perforated retardation layer 81 with the curable resin composition, the filling method described in the manufacturing method of the polarizer 1 with a coating layer can be mentioned. have. 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, cured product of the curable resin composition coated on the surface of the perforated polarizer 21 The layer can be a protective layer described later. When coating curable resin composition, you may provide a base film so that the coating layer surface formed by coating may be covered. A base film may be used as a protective layer mentioned later, and in this case, the hardened|cured material layer of curable resin (X) is good also as a bonding layer for bonding the protective layer mentioned later. You may peel a base film after hardening of curable resin (X) contained in curable resin composition.

As a method of providing the 3rd support layer 27 and the 4th support layer, the method illustrated as a method of providing the 1st support layer 25 and the 2nd support layer 26 is mentioned.

As described above, when the thickness of the raw material polarizer 20 is 15 µm or less, the depth of the through hole 22 provided in the perforated polarizer 21 can also be 15 µm or less. As described for the polarizer 41 having a retardation layer, the thickness of the laminated structure portion including the polarization region 11 and the retardation region 75 in the polarizer 41 having a retardation layer is preferably 30 μm or less. Therefore, it is preferable that the thickness of the polymerization hardened layer 85 which is a raw material retardation layer is 15 micrometers or less. Therefore, the depth of the through hole 72 provided in the drilling retardation layer 81 can also be made into 15 micrometers or less.

Thereby, the total depth of the through hole 22 and the through hole 72 can be set to 30 µm or less.

Therefore, the through hole 22 of the drilled polarizer 21 and the through hole 72 of the drilling retardation layer 71 are filled with the curable resin X, or the through hole 22 and the through hole 72 are filled Since the hardening process of curable resin (X) can be performed in a short time, the fall of workability|operativity can be suppressed.

Here, manufacture of the raw material polarizer and raw material retardation layer used for manufacture of the polarizer which has a retardation layer is demonstrated briefly.

(raw polarizer)

It is preferable that the raw material polarizer 20 does not significantly change in quality by the active energy ray irradiated in order to harden the curable resin (X) in the curable resin composition filled in the through hole 22. Such a raw material polarizer 20 is, for example, a film in which a dichroic dye is adsorbed and aligned on a polyvinyl alcohol-based resin film, or a dichroic dye is oriented in a cured layer of a polymerizable liquid crystal compound, It is as described in the above-mentioned polarization area|region 11.

(Raw material retardation layer)

The raw material retardation layer includes a retardation region in which the whole has retardation characteristics. The raw retardation layer may have, for example, retardation characteristics of the retardation layer 70 or the retardation region described above. The raw material retardation layer may have retardation characteristics functioning as, for example, a quarter-wave plate, a half-wave plate, a quarter-wave plate having reverse wavelength dispersion, or a positive C plate.

The raw material retardation layer is, for example, a stretched film obtained by uniaxially stretching or biaxially stretching a thermoplastic resin, or a polymerization cured layer of a polymerizable liquid crystalline compound.

As the thermoplastic resin constituting the stretched film, a translucent (preferably optically transparent) thermoplastic resin is preferable. Specifically, polyolefin resins, such as chain|strand polyolefin resin (polyethylene resin, polypropylene resin, etc.) and cyclic polyolefin resin (norbornene resin etc.); cellulose ester-based resins such as triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate and cellulose acetate butyrate; Polyester-based resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polytrimethylene terephthalate, polytrimethylene naphthalate, polycyclohexanedimethyl terephthalate, and polycyclohexanedimethyl naphthalate ; polycarbonate-based resin; (meth)acrylic resin; polystyrene-based resin; or mixtures and copolymers thereof.

The polymerizable liquid crystal compound constituting the polymerization cured layer is a compound having a polymerizable reactive group and exhibiting liquid crystallinity. As a polymerizable reactor, the polymerizable reactor illustrated by the raw material polarizer is mentioned. The kind of the polymerizable liquid crystal compound is not particularly limited, and a rod-shaped liquid crystal compound, a disk-shaped liquid crystal compound, and a mixture thereof can be used. The liquid crystallinity of the polymerizable liquid crystal compound may be either a thermotropic liquid crystal or a lyotropic liquid crystal, and a nematic liquid crystal or a smectic liquid crystal may be sufficient as a normal-order structure.

The raw material retardation layer is [v], for example, a method of applying a composition for forming a retardation layer comprising a polymerizable liquid crystal compound on an alignment layer formed on a base film, and polymerizing and curing the polymerizable liquid crystal compound, [vi] It can be formed by the method of apply|coating the composition for retardation layer formation on a base material layer, forming a coating film, and extending|stretching this coating film together with a base material layer. As a base material layer, the base film used by said [ii] demonstrated with the raw material polarizer is mentioned.

Examples of the stretched film and polymerization cured layer constituting the raw material retardation layer include the retardation layer described in International Publication No. 2018/003416.

<Polarizer complex>

(polarizer complex (1))

Fig. 8(a) is a schematic cross-sectional view schematically showing an example of the polarizer composite of the present embodiment, and Fig. 8(b) is a schematic plan view of the polarizer composite on the reinforcing material side. The polarizer composite 42 shown in Fig. 8 (a) is provided on the retardation layer 70 side of the polarizer 40 having a retardation layer shown in Fig. 1 (b) and the polarizer 40 having a retardation layer. It has a reinforcing material (50). The reinforcing material 50 may be provided also on the polarizer 10 side in addition to the retardation layer 70 side of the polarizer 40 which has a retardation layer.

In the polarizer composite 42 , the reinforcing material 50 has a plurality of cells 51 arranged so that each open end face faces the face of the polarizer 10 . Each of the opening end faces may be in direct contact with the polarizer 10 and may be opposed, and as shown in the polarizer composite 42 shown in FIG. It may be opposed to The cell 51 has a hollow columnar (cylindrical) structure surrounded by cell partition walls 53 that partition the cell 51, and the columnar structure has an open end face opened at both ends in the axial direction.

In the polarizer composite 42, the reinforcing material 50 is, as shown in FIG. ) is preferably provided, and it is more preferable to provide so that the cell 51 is present on the entire surface of the polarizer 40 having a retardation layer.

Since the polarizer 10 has the non-polarization region 12, it is thought that cracks are likely to occur in the periphery of the non-polarization region 12 due to the contraction of the polarizer 10 due to a temperature change received when applied to a display device, etc. . Moreover, since the thickness of the polarization area|region 11 of the polarizer 10 is as thin as 15 micrometers or less, when it receives an impact, it is thought that it is easy to generate|occur|produce a crack. In the polarizer composite 42, since the reinforcing material 50 is provided on one side of the polarizer 40 having a retardation layer as described above, cracks in the polarizer 10 that occur when a temperature change or an impact is received, or fine It is thought that it can suppress that a crack progresses into a large crack. From the viewpoint of the impact resistance of the polarizer composite 42 , the reinforcing material 50 is preferably provided on the retardation layer 70 side of the polarizer 40 having at least a retardation layer.

The reinforcing material 50 is applied to a display device or the like together with the polarizer 10 . If the inner space of the cell 51 of the reinforcing material 50 is hollow, the visibility of the display device may decrease due to a difference in refractive index between the cell partition wall 53 and the inner space of the cell 51 , or the like. Therefore, it is preferable that a light-transmitting filler is provided in the inner space of the cell 51 of the reinforcing material 50 in the polarizer composite 42 . In the reinforcing material 50 of the polarizer composite 42, when a gap is provided between the plurality of cells 51 as will be described later, a light-transmitting filler is preferably provided also in this gap. These fillers will be described later.

(polarizer complex (2))

It is a schematic sectional drawing which shows typically another example of the polarizer composite of this embodiment. The polarizer composite 43 shown in FIG. 9 is a polarizer 41 having a retardation layer shown in FIG. 2A and a reinforcing material 50 provided on the retardation layer 71 side of the polarizer 41 having a retardation layer. has Here, the case where the reinforcing material 50 is provided on the retardation layer 71 side of the polarizer 41 which has a retardation layer is shown, but the reinforcing material 50 is the retardation layer 71 of the polarizer 41 which has a retardation layer. ) side, in addition to the polarizer 10 side, may be provided. In addition, the reinforcing material 50 may be provided on the polarizer 10 side without providing the retardation layer 71 side, but from the viewpoint of impact resistance, the reinforcing material 50 is a phase difference between the polarizer 40 having a retardation layer It is preferably provided on the layer 71 side.

The reinforcing material 50 is as described above. As described above, the reinforcing material 50 may be provided with a filler in the inner space of the cell 51 of the reinforcing material 50 and in the gaps between the plurality of cells 51 .

Although the polarizer composite 43 shown in FIG. 9 has the polarizer 41 and the reinforcing material 50 each having a retardation layer shown in FIG. 2(a), it is not limited to this. For example, the polarizer 41 having a retardation layer included in the polarizer composite 43 may be a polarizer 41 having a retardation layer shown in FIGS. 2B to 2E .

(reinforcement)

As described above, the cell 51 included in the reinforcing material 50 has a hollow columnar (tubular) structure surrounded by cell partition walls 53 that partition the cell 51, and both ends of the columnar structure in the axial direction. This opened end face is formed. The cell 51 has, as an open end face, a first open end face disposed on a side relatively close to the polarizer 10 of the polarizer complexes 42 and 43, and a second aperture disposed on a relatively far side. has an end face. As for the reinforcing material 50, at least one of a 1st open end surface and a 2nd open end surface should just be arranged so that it may oppose the polarizer 10, and both a 1st open end surface and a 2nd open end surface are a polarizer. It is preferable to arrange so as to face (10).

Although the shape of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, it is preferably a polygonal shape, a circular shape, or an elliptical shape. The shape of the opening of the first open end face and the shape of the opening of the second open end face are preferably the same shape of the same size, but may have different shapes or may have different sizes as the same shape. In addition, the shape of the opening of the some cell which the reinforcing material 50 has may be mutually the same, and may be mutually different.

The plurality of cells 51 included in the reinforcing material 50 is preferably arranged so that the openings of the cells 51 are adjacent to each other in a plan view of the end face of the opening. The plurality of cells 51 are arranged such that, when viewed in plan view of the end face of the opening, the cells 51 are arranged without a gap, for example, as in the case where the opening of the cell 51 shown in FIG. 8B has a hexagonal shape or the like. It may be arranged. Alternatively, as in the case where the opening of the cells 51 has a circular shape or the like in a plan view of the opening end face of the plurality of cells 51, a part of the cell partition walls 53 of the plurality of cells 51 are in contact with each other. , may be arranged so as to have a gap between the plurality of cells 51 .

As for the reinforcing material 50, for example, as shown in FIG.8(b), the shape of an opening is hexagonal in either of a 1st open end surface and a 2nd open end surface, In the surface direction of the polarizer composite 42, , it is preferable to have a honeycomb structure in which a plurality of cells are arranged so that the openings are adjacent to each other and arranged without gaps.

Although the size of the opening of the cell 51 of the reinforcing material 50 is not particularly limited, it is preferable to have a diameter smaller than the diameter of the non-polarization region 12 . It is preferable that the diameter of a cell is 3 mm or less, 2 mm or less may be sufficient, 1 mm or less may be sufficient, and it is 0.1 mm or more normally, and 0.5 mm or more may be sufficient as it. The diameter of the opening of the cell 51 refers to the length of the longest straight line connecting two arbitrary points on the outer periphery of the opening.

The height of the cell 51 of the reinforcing material 50 (the length in the direction perpendicular to the opening end face 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. It may be, and 15 micrometers or less normally may be sufficient, and 13 micrometers or less may be sufficient and 10 micrometers or less may be sufficient as it.

It is preferable that the cell partition walls 53 partitioning the cells 51 of the reinforcing material 50 have light-transmitting properties.

The line width of the cell partition walls 53 of the reinforcing material 50 is, for example, 0.05 mm or more, 0.1 mm or more, 0.5 mm or more, 1 mm or more, and usually 5 mm or less, 3 mm or less. good night.

The cell partition walls 53 of the reinforcing material 50 can be formed of, for example, a resin material or an inorganic oxide, and are preferably formed of a resin material. Curable resins, such as a thermoplastic resin, a thermosetting resin, and an active energy ray-curable resin, etc. are mentioned as a resin material. As a resin material, For example, said curable resin (X); The thermoplastic resin etc. illustrated as a thermoplastic resin used for the said filler are mentioned. Silicon oxide (SiO2), aluminum oxide _, etc. are mentioned as an inorganic oxide.

When the reinforcing material 50 is provided on both sides of the polarizers 40 and 41 having a retardation layer, the two reinforcing materials 50 may be identical to each other (the cell 51 has the same shape and size), and may be different The openings of the cells 51 of the two reinforcing materials 50 provided on both sides of the polarizers 40 and 41 having retardation layers may be arranged so as to overlap each other in plan view, but are arranged so as to be shifted from each other in plan view, It is preferable to have

(filling)

The filler that may be provided in the reinforcing material 50 is not particularly limited as long as it has light-transmitting properties and can fill the inner space of the cell 51 of the reinforcing material 50 . The filler is preferably a material different from the material constituting the cell partition walls 53 of the reinforcing material 50 , and preferably contains a resin material. As said resin material, 1 or more types chosen from the group which consists of curable resins, such as a thermoplastic resin, a thermosetting resin, and an active energy ray-curable resin, etc. are mentioned, for example, An adhesive or an adhesive agent may be sufficient.

Examples of the thermoplastic resin include polyolefin-based resins such as chain polyolefin-based resins (polypropylene-based resins, etc.) and cyclic polyolefin-based resins (norbornene-based resins, etc.); Cellulose ester-type resin, such as a triacetyl cellulose and a diacetyl cellulose; polyester-based resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; polycarbonate-based resin; (meth)acrylic resin; polystyrene-based resin; polyether-based resin; polyurethane-based resin; polyamide-based resin; polyimide-based resin; A fluorine-type resin etc. are mentioned.

As curable resin, said curable resin (X) is mentioned, for example.

An adhesive expresses adhesiveness by adhering itself to a to-be-adhered body, and what is called a so-called pressure-sensitive adhesive. Examples of the pressure-sensitive adhesive include those containing, as a main component, a polymer such as a (meth)acrylic polymer, a silicone polymer, a polyester polymer, a polyurethane polymer, a polyether polymer, or a rubber polymer. In this specification, a main component means the component containing 50 mass % or more in the total solid of an adhesive. An active energy ray hardening type or a thermosetting type may be sufficient as an adhesive, and active energy ray irradiation or heating may adjust a crosslinking degree and adhesive force.

The adhesive contains a curable resin component, and is an adhesive other than a pressure-sensitive adhesive (adhesive). Examples of the adhesive include a water-based adhesive in which a curable resin component is dissolved or dispersed in water, an active energy ray-curable adhesive containing an active energy ray-curable compound, and a thermosetting adhesive.

As the adhesive, a water-based adhesive commonly used in the technical field of polarizing plates may be used.

Examples of the resin component contained in the water-based adhesive include polyvinyl alcohol-based resins and urethane-based resins. As an active energy ray-curable adhesive agent, the composition hardened|cured by irradiation of active energy rays, such as an ultraviolet-ray, a visible light, an electron beam, and X-rays, is mentioned. As an active energy ray-curable adhesive agent, you may use the curable resin composition containing said curable resin (X). Examples of the thermosetting adhesive include those containing, as a main component, an epoxy resin, a silicone resin, a phenol resin, a melamine resin, and the like.

(Method for producing polarizer complex)

The polarizer composites 42 and 43 shown in FIGS. 8 and 9 can be manufactured by forming the reinforcing material 50 in the polarizers 40 and 41 which have a retardation layer. The reinforcing material 50 can be obtained by, for example, forming the cell partition walls 53 that partition the cells 51 on the surfaces of the polarizers 40 and 41 having the retardation layer using a resin material or an inorganic oxide.

Although it does not specifically limit as a method of forming the cell partition 53 using a resin material, For example, Printing methods, such as inkjet printing, screen printing, gravure printing; photolithography; The coating method using a nozzle, a die|dye, etc. are mentioned. In the above method, a resin composition in which a resin material is mixed with a solvent, an additive, or the like may be used. As an additive, a leveling agent, antioxidant, a plasticizer, a tackifier, organic or inorganic filler, a pigment, antioxidant, a ultraviolet absorber, antioxidant, etc. are mentioned. The cell partition walls 53 may be formed by subjecting the printed or applied resin composition to a treatment for solidification or curing, if necessary.

Although it does not specifically limit as a method of forming the cell partition 53 using an inorganic oxide, For example, it can form by vapor-depositing an inorganic oxide.

When the reinforcing material 50 of the polarizer composites 42 and 43 has a filler, the internal space of the cell 51 or the cell 51 with respect to the reinforcing material 50 formed in the polarizers 40 and 41 having a retardation layer. What is necessary is just to fill the space|interval between them with the material which comprises a filler. The material constituting the filler may be filled, for example, by coating it on the reinforcing material 50 . Or, when using an adhesive as a material which comprises a filler, the adhesive sheet which provided the adhesive layer on the release film may be bonded together, and an adhesive may be filled.

<Optical laminate>

10-12 are schematic cross-sectional views which show typically an example of the optical laminated body of this embodiment.

The optical laminate has a protective layer on one side or both sides of the polarizers 40 and 41 having a retardation layer shown in FIGS. 1 and 2 and the polarizer complexes 42 and 43 shown in FIGS. 8 and 9 .

(Optical laminate (1))

The optical laminates 44 and 45 shown in FIGS. It has a protective layer 17 provided on the polarizer 10 side of the polarizers 40 and 41 which have a layer. The polarizer 41 which has a retardation layer may be the polarizer 41 which has a retardation layer shown to Fig.2 (b) - (e).

The protective layer 17 is a hardened|cured material layer of curable resin (X) contained in curable resin composition provided directly on the polarizer 10. As curable resin (X) which comprises the protective layer 17 which is a hardened|cured material layer, the curable resin (X) demonstrated above is mentioned, for example. The protective layer 17 is a cured product contained in the non-polarization region 12 of the polarizer 10 , or in the non-polarization region 12 of the polarizer 10 and the phase difference region 76 of the retardation layer 71 . It is preferable that it is a hardened|cured material layer of curable resin (X) which is the same as curable resin (X) which comprises.

When the protective layer 17 is a cured product layer of the same curable resin (X) as the curable resin (X) constituting the cured product of the polarizers 40 and 41 having a retardation layer, the protective layer 17 is at least a polarizer ( It is preferable to coat|cover the non-polarization area|region 12 of 10). The protective layer 17 should just cover at least a part of single side|surface of the polarizer 10, but it is preferable to coat|cover the whole surface of the single side|surface of the polarizer 10. As shown in FIG.

In order to manufacture the optical laminates 44 and 45, among those described in the manufacturing method of the polarizers 40 and 41 having a retardation layer, for example, the polarizer 10 of the polarizers 40 and 41 having a retardation layer ) side by coating a curable resin composition and irradiating an active energy ray to the curable resin (X) (the through hole 22 of the perforated polarizer 21, or the through hole 22 of the perforated polarizer 21 and the perforation retardation (with the curable resin (X) filled in the through hole 72 of the layer 81) is cured. Thereby, even if the protective layer 17 which is a hardened|cured material layer of curable resin (X) is formed on the polarizer 10 of the polarizer 40, 41 which has retardation layer, even if the optical laminated bodies 44 and 45 are obtained. good night.

Or, when manufacturing the optical laminated body 44 shown to Fig.10 (a), you may carry out by the following method. By coating the curable resin composition on the surface of the perforated polarizer 21 of the second laminate 33 (FIG. 4(d)), the curable resin composition is applied to the through hole 22 of the perforated polarizer 21. It fills, and the application layer of curable resin composition is also formed in the surface of the perforation|piercing|hole polarizer 21. Thereafter, by irradiation with active energy rays, the curable resin (X) contained in the curable resin composition in and on the surface of the through hole 22 of the perforated polarizer 21 is cured, and the cured product and the cured product layer are a protective layer ( 17) may be formed to obtain the optical laminate 44. In this case, what is necessary is just to provide the retardation layer 71 on the side opposite to the side on which the protective layer 17 of the polarizer 10 was formed. Thereby, the hardened|cured material contained in the non-polarization area|region 12 and the hardened|cured material layer which comprises the protective layer 17 can be integrated, and the hardened|cured material of curable resin (X) which comprises the protective layer 17 is , it can be said that it is the same as that of the hardened|cured material contained in the non-polarization area|region 12.

When manufacturing the optical laminated body 45 shown to FIG.10(b), you may carry out by the following method. On the fourth support layer described above, in the laminate in which the perforated retardation layer 81 and the perforated polarizer 21 are laminated in this order, a curable resin composition is coated on the surface of the perforated polarizer 21 . Thereby, the through hole 22 of the drilling polarizer 21 and the through hole 72 of the drilling retardation layer 81 are filled with the curable resin composition containing the curable resin (X), and the surface of the drilled polarizer 21 An application layer of the Edo-curable resin composition is formed. Thereafter, by irradiation with an active energy ray, the curable resin contained in the through-hole 22 of the perforated polarizer 21 , in the through-hole 72 of the perforated retardation layer 81 , and in the coating layer on the perforated polarizer 21 . (X) may be cured to form a cured product and a protective layer 17 that is a cured product layer to obtain an optical laminate 45 . In this case, the cured product contained in the non-polarization region 12 and the non-retardation region 76 and the cured product layer constituting the protective layer 17 can be integrated, and the curable resin constituting the protective layer 17 . (X) can be made into the thing similar to curable resin (X) which comprises the hardened|cured material contained in the non-polarization area|region 12 and the non-retardation area|region 76.

When providing the protective layer 17 which is a hardened|cured material layer in the polarizer 41 which has a retardation layer shown to FIG.2(b), the polarization area|region 11 and the non-polarization area|region 12 of the polarizer 10 A protective layer 17 may be provided to fill the thickness difference of . Specifically, in the non-polarization region 12 of the polarizer 10 shown in FIG. ), the protective layer 17 may be provided by coating a curable resin composition to fill the thickness difference and to cover the surface of the polarization region 11 .

When the protective layer 17 which is a hardened|cured material layer is provided in the polarizer 41 which has a retardation layer shown in FIG.2(d), of the polarizer 10 shown to FIG.2(d), a polarization region ( 11), on the side where the non-polarization region 12 protrudes from the surface (the upper surface side of Fig. 2(d)), a protective layer 17 by coating a curable resin composition to fill the thickness difference may be provided. In this case, the protective layer 17 may coat|cover the surface of the non-polarization area|region 12, and it is not necessary to coat|cover it.

When coating curable resin composition, you may provide a base film so that the coating layer surface formed by coating may be covered. In this case, the base film may be used as the protective layer 17 , and the cured product layer of the curable resin (X) may be used as a bonding layer for bonding the protective layer 17 to the polarizer 41 having a retardation layer. You may peel a base film after hardening of curable resin (X).

(optical laminate (2))

The optical laminates 46 and 47 shown in FIGS. and protective layers 17 and 18. The optical laminates 46 and 47 may have the protective layer 17 (or 18) only on the single side|surface side of the polarizers 40 and 41 which have a retardation layer. The polarizer 41 which has a retardation layer may be the polarizer 41 which has a retardation layer shown to Fig.2 (b) - (e).

The protective layers 17 and 18 can be provided on the polarizers 40 and 41 having a retardation layer with a bonding layer such as an adhesive layer or an adhesive layer interposed therebetween. In this case, for example, film-type protective layers 17 and 18 may be laminated on the polarizers 40 and 41 having a retardation layer through a bonding layer. When the optical laminate 47 is a thing in which the protective layer 17 is provided with the bonding layer interposed on the polarizer 10 side of the polarizer 41 which has a retardation layer shown in FIG.2(b) or (d) It is preferable to provide a bonding layer so that the thickness difference between the polarization area|region 11 and the non-polarization area|region 12 of the polarizer 10 may be filled, and to provide the protective layer 17. The optical laminate 47 is a protective layer 18 provided with a bonding layer interposed on the retardation layer 71 side of the polarizer 41 having a retardation layer shown in Fig. 2(c) or (e) In this case, it is preferable to provide a bonding layer and provide the protective layer 18 so as to fill the thickness difference between the retardation region 75 and the non-retardation region 76 of the retardation layer 71 .

The protective layers 17 and 18 may be provided so as to be in direct contact with the polarizers 40 and 41 having a retardation layer without interposing a bonding layer therebetween. The protective layers 17 and 18 provided on the polarizer 10 side of the polarizers 40 and 41 having a retardation layer include, for example, a composition containing a resin material constituting the protective layers 17 and 18, and the retardation layer. It can be formed by coating on the polarizer 10 or on the retardation layers 70 and 71 of the polarizers 40 and 41 having When the optical laminate 47 is a thing in which the protective layer 17 is provided with the bonding layer interposed on the polarizer 10 side of the polarizer 41 which has a retardation layer shown in FIG.2(b) or (d) prepares a composition containing a resin material constituting the protective layer 17 so as to fill the thickness difference between the polarization region 11 and the non-polarization region 12 of the polarizer 10, and forms the protective layer 17 It is preferable to do The optical laminate 47 is a protective layer 18 provided with a bonding layer interposed on the retardation layer 71 side of the polarizer 41 having a retardation layer shown in Fig. 2(c) or (e) In this case, a composition containing a resin material constituting the protective layer 18 is prepared so as to fill the thickness difference between the retardation region 75 and the non-retardation region 76 of the retardation layer 71, and the protective layer 18 It is preferable to form

(Optical laminate (3))

The optical laminates 48 and 49 shown in Figs. 12A and 12B are protective layers 17 and 18 on both sides of the polarizer composites 42 and 43 shown in Figs. ) has The optical laminates 48 and 49 may have the protective layer 17 (or 18) only on one side of the polarizer composites 42 and 43 . The protective layers 17 and 18 can be provided on the polarizer composites 42 and 43 through a bonding layer such as an adhesive layer or an adhesive layer. In this case, for example, film-type protective layers 17 and 18 may be laminated on the polarizer composites 42 and 43 via a bonding layer. The protective layer 18 provided on the reinforcing material 50 side of the polarizer composites 42 and 43 fills, for example, the inner space of the cell 51 of the reinforcing material 50 and the gap between the plurality of cells 51 . What is necessary is just to provide a bonding layer so that it is so, and to laminate|stack a protective layer.

Alternatively, by laminating a laminated sheet in which an application layer of a material serving as a bonding layer is formed on one side of the film-type protective layer on the reinforcing material 50, the inner space of the cell 51 of the reinforcing material 50 and a plurality of cells ( 51), the protective layer may be formed by filling the gap or the like with a material serving as the bonding layer.

The protective layers 17 and 18 may be provided so as to be in direct contact with the polarizer composites 42 and 43 without interposing a bonding layer. The protective layers 17 and 18 provided on the polarizer 10 side of the polarizer composites 42 and 43 include, for example, a composition containing a resin material constituting the protective layers 17 and 18, and the polarizer composite 42, 43), it can form by apply|coating on the polarizer 10, and solidifying or hardening this application layer. The protective layer 18 provided on the reinforcing material 50 side of the polarizer composites 42 and 43 fills the inner space of the cell 51 of the reinforcing material 50 and the gap between the plurality of cells 51, The protective layer 18 may be formed by providing a composition containing a resin material constituting the protective layer 18 .

The polarizers 40 and 41 having a retardation layer and the protective layer 17 (or 18) provided on one side of the polarizer complexes 42 and 43 are the polarizers 40 and 41 having a retardation layer and the polarizer complex 42 , 43), this protective layer 17 (or 18) is a non-polarization region 12 of the polarizer 40 and the polarizer complex 42 having a retardation layer, or a retardation layer A cured product layer of the same curable resin (X) as the curable resin (X) constituting the cured product included in the non-polarization region 12 and the non-cell region 56 of the polarizer 41 and the polarizer composite 43 having can The curability which comprises the hardened|cured material layer which comprises the protective layer 17 (or 18) of the hardened|cured material contained in the non-polarization area|region 12 or the non-polarization area|region 12 and the non-cell area|region 56 by this. It can be set as the same curable resin (X) as resin (X).

One of the protective layers 17 and 18 may be a protective layer provided with a bonding layer interposed therebetween, and the other may be a protective layer provided without a bonding layer interposed therebetween. The protective layers 17 and 18 included in the optical laminates 46 to 49 may be the same as or different from each other.

When the polarizer composites 42 and 43 have a structure in which reinforcing materials 50 are provided on both surfaces of the polarizers 40 and 41 having retardation layers, the protective layers 17 and 18 are formed of the reinforcing materials 50 on both surfaces. It is good to prepare it on top of each.

(protective layer)

It is preferable that the protective layers 17 and 18 are a resin layer which can transmit light, and a resin film may be sufficient as it, and the coating layer formed by apply|coating the composition containing a resin material may be sufficient as it. The resin used for the resin layer is preferably a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier properties, isotropy, stretchability, and the like. As a thermoplastic resin, the thermoplastic resin which comprises the base film which may be used for manufacture of the above-mentioned raw material polarizer 20 is mentioned. When the optical laminates 44 to 49 and 91 to 94 have the protective layers 17 and 18 on both surfaces, the resin compositions of the protective layers 17 and 18 may be the same as or different from each other.

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

(bonding layer)

A bonding layer is an adhesive layer or an adhesive bond layer. Examples of the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer and the adhesive for forming the adhesive layer include the pressure-sensitive adhesive and adhesive used for constituting the above-described filler.

<Laminate body having bonding layer for optical display element>

The polarizers 40 and 41 having a retardation layer shown in Figs. 1 and 2, the polarizer complexes 42 and 43 shown in Figs. 8 and 9, and the optical laminates 44 to 49 shown in Figs. Moreover, you may have the bonding layer for optical display elements for bonding to the optical display element (liquid crystal panel, organic electroluminescent element) of display apparatuses, such as a liquid crystal display device and an organic electroluminescent display.

Like the polarizer 41 having a retardation layer shown in Figs. 2(b) to 2(e), between the polarization region 11 and the non-polarization region 12, or between the phase difference region 75 and the non-retardation region 76 When providing the bonding layer for optical display elements in the surface in which the thickness difference generate|occur|produces in between, it is preferable to provide the bonding layer for optical display elements so that this thickness difference may be filled.

In the polarizer composites 42 and 43 and the optical laminates 48 and 49 , when providing the bonding layer for optical display elements on the surface of the reinforcing material 50 , the optical display element as a filler provided in the reinforcing material 50 . Using the material constituting the bonding layer for the reinforcing material, the filling of the filler to the inner space of the cell 51 of the reinforcing material 50 and the formation of the bonding layer for an optical display element may be performed simultaneously.

10 polarizer, 11 polarization region, 11m first plane, 11n second plane, 12 non-polarization region, 17, 18 protective layer, 20 raw polarizer, 21 perforated polarizer, 22 through hole, 25 first support layer, 26 second support layer, 27 third supporting layer, 31 first laminate, 32 through hole, 33 second laminate, 34 third laminate, 35 fourth laminate, 36 through hole, 37 fifth laminate, 40, 41 retardation layer Polymerization having a polarizer, 42, 43 polarizer composite, 44 to 49 optical laminate, 50 reinforcing material, 51 cells, 53 cell barrier ribs, 70, 71 retardation layer, 72 through holes, 75 retardation region, 76 non-retardation region, 80 substrate layer A cured layer, 81 perforated retardation layer, 84 substrate layer, 85 polymerization cured layer.

Claims (16)

A polarizer having a retardation layer, comprising: a polarizer; and a retardation layer provided on one surface side of the polarizer;
The polarizer has a polarization region having a thickness of 15 μm or less and a non-polarization region surrounded by the polarization region in plan view,
The said non-polarization area|region is the area|region in which the hardened|cured material of active energy ray-curable resin was provided in the through-hole enclosed by the said polarization area|region in planar view, The polarizer which has a retardation layer. The phase difference layer according to claim 1, wherein the retardation layer has a retardation characteristic and exists in a region corresponding to the polarization region, and a non-retardation region having no phase difference characteristic and existing in a region corresponding to the non-polarization region. have,
The non-polarization region and the non-retardation region include a cured product of an active energy ray-curable resin,
The said non-retardation area|region is the area|region in which the hardened|cured material of an active energy ray-curable resin was provided in the through-hole surrounded by the said phase difference area|region in planar view, The polarizer which has a retardation layer. The polarizer having a retardation layer according to claim 2, wherein a thickness of the cured product is the same as a thickness of a laminated structure portion including the polarization region and the retardation region in the polarizer having the retardation layer. The polarizer having a retardation layer according to claim 2, wherein a thickness of the cured product is smaller than a thickness of a laminated structure portion including the polarization region and the retardation region in the polarizer having the retardation layer. The polarizer having a retardation layer according to claim 2, wherein a thickness of the cured product is larger than a thickness of a laminated structure portion including the polarization region and the retardation region in the polarizer having the retardation layer. The polarizer having a retardation layer according to any one of claims 2 to 5, wherein the retardation region is a polymerization cured layer of a polymerizable liquid crystal compound. The polarizer with a retardation layer as described in any one of Claims 1-6 in which the said non-polarization area|region has translucency. The polarizer with a retardation layer in any one of Claims 1-7 whose planar diameter diameters of the said non-polarization area|region are 0.5 mm or more and 20 mm or less. The polarizer with a retardation layer in any one of Claims 1-8 in which the said active energy ray-curable resin contains an epoxy compound. The polarizer having a retardation layer according to claim 9, wherein the epoxy compound contains an alicyclic epoxy compound. A polarizer composite having a polarizer having the retardation layer according to any one of claims 1 to 10, and a reinforcing material provided on at least one surface side of the polarizer having the retardation layer,
The reinforcing material has a plurality of cells arranged so that each open end face faces the face of the polarizer, the polarizer composite. The polarizer composite according to claim 11, wherein the shape of the opening of the cell is a polygonal shape, a circular shape, or an elliptical shape. The polarizer composite according to claim 12, wherein a light-transmitting filler is provided in the inner space of the cell. A polarizer having a retardation layer according to any one of claims 1 to 10, or an optical laminate having a protective layer on one side or both sides of the polarizer composite according to any one of claims 11 to 13 . The optical laminate according to claim 14, wherein the protective layer is a cured product layer of an 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-polarization region.

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