WO2018151199A1 - Polarizing laminate - Google Patents

Abstract

This polarizing laminate 1 is provided with: a polarizing layer 2; a first resin layer 3 which is arranged on one surface side of the polarizing layer 2 and is configured from a material that contains a polycarbonate; and a second resin layer 4 which is arranged on the other surface side of the polarizing layer 2 and is configured from a material that contains a polycarbonate. The first resin layer 3 and the second resin layer 4 have different retardations. In cases where the first resin layer 3 has a lower retardation than the second resin layer 4, it is preferable that the polarizing laminate 1 is used in a bent state where the first resin layer 3 is positioned on the recessed side, while the second resin layer 4 is positioned on the projected side.

Description

Polarizing laminate

The present invention relates to a polarizing laminate.

For example, a polarizing plate having a polarizing function is known for the purpose of removing stray light, anti-glare and the like (for example, see Patent Documents 1 and 2).

The sun visor described in Patent Document 1 has a polarizing filter. Since the polarizing layer of the polarizing filter is produced by stretching, the heat shrinkage rate is relatively high. For this reason, when the polarizing plate is used in a relatively high temperature environment, the polarizing layer is thermally contracted and deformed. As a result, there is a possibility that a problem that the polarizing plate easily falls off from the frame portion may occur.

In the head-up display described in Patent Document 2, a polarizing plate is provided so as to cover an opening through which display light passes. This polarizing plate has a resin layer having optical transparency and a polarizing layer provided by being laminated on the resin layer. For this reason, it is suppressed that a stray light injects into the light source which radiate | emits display light. Moreover, the polarizing plate described in Patent Document 2 is used in a curved state in which the resin layer is positioned on the curved concave side and the polarizing layer is positioned on the curved outer side.

Since the polarizing layer is produced by stretching, the heat shrinkage rate is relatively high. For this reason, when the polarizing plate is used under a relatively high temperature environment, the polarizing layer is likely to be thermally contracted. For this reason, the curvature of curvature of the polarizing layer changes, and the entire polarizing plate is easily deformed. As a result, there is a possibility that a problem that the polarizing plate easily falls off the head-up display may occur.

JP 2007-196828 A JP 2008-70504 A

An object of the present invention is to provide a polarizing laminate capable of preventing excessive deformation due to heat.

Such an object is achieved by the present inventions (1) to (6) below.
(1) a polarizing layer;
A first resin layer provided on one surface side of the polarizing layer and made of a material containing polycarbonate;
A second resin layer provided on the other surface side of the polarizing layer and made of a material containing polycarbonate,
The polarizing laminate, wherein the first resin layer and the second resin layer have different retardations.

(2) The retardation of the first resin layer is 10 nm or more and 1500 nm or less,
The retardation of the said 2nd resin layer is a polarizing laminated body as described in said (1) which is 2000 nm or more and 10,000 nm or less.

(3) The polarizing laminate according to (2), wherein the ratio of the retardation of the first resin layer to the retardation of the second resin layer is 1/1000 or more and 3/5 or less.

(4) The first resin layer has a lower retardation than the second resin layer,
The polarizing property according to any one of the above (1) to (3), wherein a ratio between the thickness of the first resin layer and the thickness of the second resin layer is 1/20 or more and 1/2 or less. Laminated body.

(5) The first resin layer has a lower retardation than the second resin layer,
5. The method according to any one of (1) to (4), wherein the first resin layer is used in a curved state such that the first resin layer is positioned on the curved concave side and the second resin layer is positioned on the curved convex side. Polarizing laminate.

(6) The polarizing laminate according to (5), wherein the polarizing radius of the polarizing laminate in the curved state is 40 mm or more and 1000 mm or less.

According to the present invention, it is possible to provide a polarizing laminate that can prevent excessive deformation due to heat.

FIG. 1 is a cross-sectional view of the polarizing laminate of the present invention. FIG. 2 is a cross-sectional view showing a curved state of the polarizing laminate of the present invention. FIG. 3 is a perspective view of a housing in which the polarizing laminate of the present invention is installed. 4 is a cross-sectional view taken along line AA in FIG.

Hereinafter, the polarizing laminate of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<Embodiment>
FIG. 1 is a cross-sectional view of the polarizing laminate of the present invention. FIG. 2 is a cross-sectional view showing a curved state of the polarizing laminate of the present invention.

In FIGS. 1 and 2, the upper side is referred to as “upper” or “upper”, and the lower side is also referred to as “lower” or “lower”. In the drawings referred to in the present specification, the dimension in the thickness direction is exaggerated and is greatly different from the actual dimension.

The polarizing laminate shown in FIG. 1 is a laminate having a polarizing function, and is used for the purpose of removing stray light, anti-glare and the like. The polarizing laminate 1 includes a polarizing layer 2, a first resin layer 3 provided on one surface side (the upper side in FIG. 1) of the polarizing layer 2, which is made of a material containing polycarbonate, and the polarizing layer 2. Provided on the other surface side (lower side in FIG. 1) is a second resin layer 4 made of a material containing polycarbonate, a first adhesive layer 5, and a second adhesive layer 6. Yes. The first resin layer 3 and the second resin layer 4 are different in retardation (product of birefringence and thickness).

Suppose that such a polarizing laminate 1 is used in a curved state as shown in FIG. 2, for example. In this case, a resin layer (in this embodiment, the second resin layer 4) having a high retardation is positioned on the curved convex side, and a resin layer (in the present embodiment, the first resin layer 3) having a low retardation is positioned on the curved concave side. ) Is located. When used in a relatively high temperature environment, the second resin layer 4 is likely to be deformed in a direction in which the curvature curvature is reduced due to heat shrinkage, but the first resin layer 3 is less likely to be deformed due to heat shrinkage. be able to. That is, the first resin layer 3 can exhibit a function of suppressing thermal deformation of the second resin layer 4. As a result, excessive deformation due to heat can be prevented as the entire polarizing laminate 1.

Hereinafter, each part of the polarizing laminate 1 will be described.
(Polarizing layer)
The polarizing layer 2 has a function of extracting linearly polarized light having a polarization plane in a predetermined direction from incident light (natural light that is not polarized). Thereby, the light passing through the polarizing laminate 1 is polarized.

The degree of polarization of the polarizing layer 2 is not particularly limited, but is preferably 50% or more and 100% or less, and more preferably 80% or more and 100% or less. Moreover, the visible light transmittance of the polarizing layer 2 is not particularly limited, but is preferably 10% or more and 80% or less, and more preferably 20% or more and 50% or less.

The constituent material of the polarizing layer 2 is not particularly limited as long as it has the above functions. For example, polyvinyl alcohol (PVA), partially formalized polyvinyl alcohol, polyethylene vinyl alcohol, polyvinyl butyral, polycarbonate, ethylene- A dichroic substance such as iodine or a dichroic dye is adsorbed and dyed on a polymer film composed of a vinyl acetate copolymer partially saponified product, uniaxially stretched, dehydrated polyvinyl alcohol or poly Examples thereof include polyene-based oriented films such as a dehydrochlorinated product of vinyl chloride.

Among these, the polarizing layer 2 is preferably a uniaxially stretched film in which iodine or a dichroic dye is adsorbed and dyed on a polymer film containing polyvinyl alcohol (PVA) as a main material. Polyvinyl alcohol (PVA) is a material excellent in transparency, heat resistance, affinity with iodine or dichroic dye as a dyeing agent, and orientation during stretching. Therefore, the polarizing layer 2 containing PVA as a main material has excellent heat resistance and excellent polarizing ability.

Examples of the dichroic dye include chloratin fast red, congo red, brilliant blue 6B, benzoperpurine, chlorazole black BH, direct blue 2B, diamine green, chrysophenone, sirius yellow, direct first red, and acid black. Etc.

The thickness of the polarizing layer 2 is not particularly limited, and is preferably 5 μm or more and 60 μm or less, for example, and more preferably 10 μm or more and 40 μm or less.

(First resin layer and second resin layer)
The first resin layer 3 and the second resin layer 4 contain a polycarbonate resin. Since the polycarbonate-based resin is rich in mechanical strength such as transparency (translucency) and rigidity, the transparency and impact resistance of the polarizing laminate 1 can be improved. Further, the polycarbonate resin has a specific gravity of about 1.2, and is classified as a light resin material, so that the polarizing laminate 1 can be reduced in weight.

The polycarbonate-based resin is not particularly limited, and various types can be used. Among them, an aromatic polycarbonate-based resin is preferable. The aromatic polycarbonate resin has an aromatic ring in its main chain, and thereby, the strength of the polarizing laminate 1 can be further improved.

This aromatic polycarbonate resin is synthesized by, for example, an interfacial polycondensation reaction between bisphenol and phosgene, or an ester exchange reaction between bisphenol and diphenyl carbonate.

Examples of the bisphenol include bisphenol A and bisphenol (modified bisphenol) which is the origin of the repeating unit of the polycarbonate represented by the following formula (1A).

（式（１Ａ）中、Ｘは、炭素数１～１８のアルキル基、芳香族基または環状脂肪族基であり、ＲａおよびＲｂは、それぞれ独立して、炭素数１～１２のアルキル基であり、ｍおよびｎは、それぞれ０～４の整数であり、ｐは、繰り返し単位の数である。）

(In the formula (1A), X is an alkyl group having 1 to 18 carbon atoms, an aromatic group or a cyclic aliphatic group, and Ra and Rb are each independently an alkyl group having 1 to 12 carbon atoms. , M and n are each an integer of 0 to 4, and p is the number of repeating units.)

Specific examples of the bisphenol that is the origin of the repeating unit of the polycarbonate represented by the formula (1A) include 4,4 ′-(pentane-2,2-diyl) diphenol, 4,4 ′-( Pentane-3,3-diyl) diphenol, 4,4 '-(butane-2,2-diyl) diphenol, 1,1'-(cyclohexanediyl) diphenol, 2-cyclohexyl-1,4-bis ( 4-hydroxyphenyl) benzene, 2,3-biscyclohexyl-1,4-bis (4-hydroxyphenyl) benzene, 1,1′-bis (4-hydroxy-3-methylphenyl) cyclohexane, 2,2′- Examples thereof include bis (4-hydroxy-3-methylphenyl) propane, and one or more of them can be used in combination.

In particular, the polycarbonate-based resin is preferably composed mainly of a bisphenol-type polycarbonate-based resin having a skeleton derived from bisphenol. By using such a bisphenol-type polycarbonate-based resin, the polarizing laminate 1 exhibits further excellent strength.

Further, the content of the polycarbonate-based resin in the first resin layer 3 or the second resin layer 4 is not particularly limited, but 75% in 100 parts by mass of the first resin layer 3 or the second resin layer 4. The amount is preferably at least part by mass, more preferably at least 85 parts by mass. By setting the content of the polycarbonate resin within the above range, the polarizing laminate 1 can exhibit excellent strength.

Here, the retardation of the first resin layer 3 is different from the retardation of the second resin layer 4, and the retardation of the first resin layer 3 is lower than the retardation of the second resin layer 4. . Thereby, although the 2nd resin layer 4 tends to deform | transform in the direction in which a curvature curvature becomes small by heat shrink, the 1st resin layer 3 can make it difficult to deform | transform by heat shrink.

For example, when the polarizing laminate 1 is used as a cover member of a device such as a head-up display, it is used in a curved state as shown in FIG. 2, and generally, the curved convex side is a light source or the like. It will be arranged in the direction located on the side. That is, the second resin layer 4 is positioned on the curved convex side, and the first resin layer 3 is positioned on the curved concave side. In this case, since the second resin layer 4 has a relatively high thermal shrinkage rate, it is relatively easy to be thermally deformed. However, in the polarizing laminate 1, the first resin layer 3 is thermally deformed by the second resin layer 4. The function which suppresses can be exhibited. Therefore, excessive deformation due to heat can be prevented as the entire polarizing laminate 1. As a result, it is possible to prevent the polarizing laminate 1 from dropping from the apparatus due to thermal deformation.

The retardation of the first resin layer 3 is preferably 10 nm or more and 1500 nm or less, and more preferably 15 nm or more and 600 nm or less. The retardation of the second resin layer 4 is preferably 2000 nm or more and 10,000 nm or less, and more preferably 2500 nm or more and 5000 nm or less. Thereby, the retardation of the 1st resin layer 3 can be made low enough, and the retardation of the 2nd resin layer 4 can be made high enough. Therefore, the polarizing performance of the polarizing laminate 1 can be sufficiently enhanced, and the polarizing laminate 1 can prevent excessive thermal deformation due to heat.

The ratio of the retardation of the first resin layer 3 to the retardation of the second resin layer 4 is preferably 1/1000 or more and 3/5 or less, and is preferably 3/1000 or more and 6/25 or less. Is more preferably 1/300 or more and 1/5 or less. Thereby, the retardation of the 1st resin layer 3 can be made low enough, and the retardation of the 2nd resin layer 4 can be made high enough. Therefore, the polarizing performance of the polarizing laminate 1 can be sufficiently enhanced, and the polarizing laminate 1 can prevent excessive thermal deformation due to heat.

Such a difference in retardation between the first resin layer 3 and the second resin layer 4 can be expressed by varying the constituent material, thickness, and draw ratio.

The thickness of the first resin layer 3 is preferably 0.05 mm or more and 0.5 mm or less, and preferably 0.1 mm or more and 0.4 mm or less. The thickness of the second resin layer 4 is preferably 0.25 mm or more and 1.0 mm or less, and preferably 0.3 mm or more and 0.8 mm or less. The ratio of the thickness of the first resin layer 3 to the thickness of the second resin layer 4 is preferably 1/20 or more and 1/2 or less, and is 1/8 or more and 1/3 or less. Is more preferable. Thereby, the said effect can be exhibited more reliably.

The draw ratio of the first resin layer 3 is preferably 1.0 or more and 1.1 or less. The draw ratio of the second resin layer 4 is preferably 1.5 or more and 3.0 or less.

Further, it is preferable that the extending directions of the first resin layer 3, the second resin layer 4, and the polarizing layer 2 are the same. Thereby, the polarization performance of the polarizing laminate 1 can be further enhanced. In addition, since the 1st resin layer 3 has comparatively low retardation, even if the 1st resin layer 3 differs from the extending | stretching direction of the 2nd resin layer 4 and the polarizing layer 2, the polarizing laminated body 1 of FIG. The polarization performance can be improved.

(First adhesive layer)
A first adhesive layer 5 is provided between the polarizing layer 2 and the first resin layer 3 to bond (adhere) them.
Thereby, the durability of the polarizing laminate 1 can be made particularly excellent.

The adhesive (or pressure-sensitive adhesive) constituting the first adhesive layer 5 is not particularly limited, and examples thereof include acrylic adhesives, urethane adhesives, epoxy adhesives, and silicone adhesives.

Of these, urethane adhesives are preferred. Thereby, while making the transparency, adhesive strength, and durability of the first adhesive layer 5 more excellent, it is possible to make the followability to a shape change particularly excellent, and the polarizing laminate 1 is bent. It can be made more suitable by various processing such as processing.

In particular, the formation of the first adhesive layer 5 uses a two-component urethane adhesive, and the first treatment for causing the curing reaction to proceed in a low humidity environment, and the treatment temperature is higher than that of the first treatment. Is preferably performed by performing the second treatment at a high temperature.

Accordingly, the amount of NCO groups can be suitably adjusted so as to prevent the NCO group from being excessive with respect to the hydroxyl group of the main agent and to be a suitable amount according to the hydroxyl group of the main agent, and the curing reaction ( In the initial stage of the polymerization reaction), the formation of urethane bonds can be suitably advanced, and it is possible to effectively prevent the bubbles due to the generation of carbon dioxide from adversely affecting the appearance and function of the polarizing laminate 1, The productivity of the polarizing laminate 1 can be made excellent.

The humidity when performing the first treatment is preferably 60% RH or less, and more preferably 55% RH or less.

Thereby, the side reaction which generate | occur | produces a carbon dioxide can be prevented and suppressed more effectively, and the above effects are exhibited more notably.
Moreover, it is preferable that the temperature at the time of performing a 1st process is 10 degreeC or more and 30 degrees C or less.

Thereby, the side reaction that generates carbon dioxide can be more effectively prevented and suppressed, and the productivity of the polarizing laminate 1 can be further improved.

The treatment time of the first treatment is preferably 12 hours or more and 60 hours or less, and more preferably 18 hours or more and 48 hours or less.

Thereby, the productivity of the polarizing laminate 1 can be further improved while sufficiently progressing the target urethane bond formation reaction.

The temperature at the time of performing the second treatment is preferably higher than the treatment temperature in the first treatment, and specifically, it is preferably 30 ° C. or more and 50 ° C. or less.

Thereby, the productivity of the polarizing laminate 1 can be further improved while reliably preventing the unintended quality deterioration of the polarizing laminate 1.

The treatment time of the second treatment is preferably 12 hours or more and 60 hours or less, and more preferably 18 hours or more and 48 hours or less.

Thereby, the productivity of the polarizing laminate 1 can be further improved while reliably preventing the unintended quality deterioration of the polarizing laminate 1.

Further, the first adhesive layer 5 may include a component other than the adhesive (or adhesive).

Examples of such components include stabilizers (thermal stabilizers, ultraviolet absorbers, antioxidants, etc.), plasticizers, colorants, flame retardants, antistatic agents, viscosity modifiers, and the like.

The content of the adhesive in the first adhesive layer 5 is preferably 50% by mass or more, and more preferably 60% by mass or more.

Although the thickness of the 1st contact bonding layer 5 is not specifically limited, For example, it is preferable that they are 0.1 micrometer or more and 80 micrometers or less, it is more preferable that they are 1 micrometer or more and 60 micrometers or less, and they are 2 micrometers or more and 50 micrometers or less. Is more preferable.

Thereby, the durability, workability, and the like of the polarizing laminate 1 can be further improved while the optical properties of the polarizing laminate 1 are further improved.

(Second adhesive layer)
A second adhesive layer 6 is provided between the polarizing layer 2 and the second resin layer 4 to join (adhere) them.
Thereby, the durability of the polarizing laminate 1 can be made particularly excellent.

The second adhesive layer 6 preferably satisfies the same conditions as the first adhesive layer 5 described above.
Thereby, the same effect as described above can be obtained.

The thickness of the polarizing laminate 1 (average thickness in the form of a flat plate as shown in FIG. 1) is not particularly limited, but is preferably 0.3 mm or more and 5.0 mm or less, 0.4 mm As mentioned above, it is more preferable that it is 2.0 mm or less. Thereby, relatively high strength and weight reduction can be achieved at a higher level.

The bending radius of the polarizing laminate 1 in the curved state is preferably 40 mm or more and 1000 mm or less, and more preferably 50 mm or more and 900 mm or less. By using in such a curved state, the effect of the present invention can be effectively exhibited.

Also, the bending direction (the direction along the arrow direction in FIG. 2) in the bending state shown in FIG. 2 is coincident with the extending directions of the polarizing layer 2, the first resin layer 3, and the second resin layer 4. It is preferable. Thereby, the polarization performance of the light-polarizing laminated body 1 can be improved more.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention. It is.

For example, each part constituting the polarizing laminate of the present invention can be replaced with one having an arbitrary configuration capable of exhibiting the same function.

Further, the polarizing laminate of the present invention may be added with an arbitrary component in addition to the above-described configuration.

More specifically, for example, the polarizing laminate of the present invention may include a protective layer for protecting the surface, an intermediate layer, a power adjusting layer for adjusting the power as a lens, and the like.

Hereinafter, based on an Example, this invention is demonstrated more concretely.
1. 1. Examination of polarizing laminate 1-1. Preparation of polarizing laminate [Example 1]
[1] An extruder was connected to the T die, and a polycarbonate resin (Iupilon E-2000, manufactured by Mitsubishi Engineering Plastics) was extruded from the extruder to obtain a polycarbonate resin substrate. A polycarbonate film having an average thickness of 100 μm was obtained as the first resin layer, and a polycarbonate film having an average thickness of 400 μm was obtained as the second resin layer.

On the other hand, polyvinyl alcohol (manufactured by Kuraray Co., Ltd., “VF-PS”) was prepared and stretched in one direction so that the stretching degree was 400% to obtain a polarizing layer.

Then, on both sides of the polarizing film, a two-component moisture-curing polyurethane adhesive (main agent: Takelac® A-520 manufactured by Mitsui Chemicals, Inc., curing agent: Mitsui Chemicals) as an adhesive so that the thickness after drying becomes 20 μm. Takenate A-50 (manufactured by Co., Ltd.) was applied, and the first resin layer and the second resin layer were bonded and bonded to each urethane adhesive layer. And this laminated body was cut out to the magnitude | size of 200 mm x 200 m in planar view, and the polarizing laminated body of Example 1 was obtained.

The retardation of the first resin layer was 20 nm, and the retardation of the second resin layer was 2600 nm. The ratio of the retardation of the first resin layer to the retardation of the second resin layer (the retardation of the first resin layer / the retardation of the second resin layer) was 1/130. The ratio of the thickness of the first resin layer to the thickness of the second resin layer (the thickness of the first resin layer / the thickness of the second resin layer) was 1/4.

[Example 2]
A polarizing laminate of Example 2 was obtained in the same manner as in Example 1 except that the configuration of the polarizing laminate was changed as shown in Table 1.

[Example 3]
A polarizing laminate of Example 3 was obtained in the same manner as in Example 1 except that the configuration of the polarizing laminate was changed as shown in Table 1.

[Example 4]
A polarizing laminate of Example 4 was obtained in the same manner as in Example 1 except that the configuration of the polarizing laminate was changed as shown in Table 1.

[Comparative Example 1]
A polarizing laminate of Comparative Example 1 was obtained in the same manner as in Example 1 except that the configuration of the polarizing laminate was changed as shown in Table 1.

1-2. Evaluation The polarizing laminates of each Example and each Comparative Example were evaluated by the following methods.
(Thermal deformation)
The obtained polarizing laminate was installed in a housing having an opening of 200 mm × 105 mm as shown in FIG. In addition, as shown in FIG. 4, a pair of grooves are formed on the inner wall surface of the casing, and the polarizing laminate can be obtained by inserting an edge of the polarizing laminate into each groove. Installed in the case. At this time, the layer having the lower retardation (second resin layer) was placed on the curved convex side (lower side in FIG. 4).

Note that the depth of the groove was 2 mm and the width was 2 mm. Further, the radius of curvature of the polarizing laminate in the installed state was 100 mm.

Then, in this state, the polarizing laminate was put in an oven at 110 ° C. together with the casing, left for 168 hours, taken out and observed, and evaluated as follows.
A: No change was observed in the shape of the polarizing laminate.
○: Some deformation is observed, but there is no practical problem.
X: The polarizing laminate was detached from the casing.

The evaluation results in the polarizing laminates of Examples and Comparative Examples obtained as described above are shown in Table 1 below.

　表１に示したように、各実施例における偏光性積層体では、比較例と同等もしくはそれ以上に熱変形を抑制することができ、比較例に対して満足のいく結果となった。

As shown in Table 1, in the polarizing laminates in each example, the thermal deformation could be suppressed to the same level as or higher than that of the comparative example, which was satisfactory with respect to the comparative example.

The polarizing laminate of the present invention is provided on the other surface side of the polarizing layer, the first resin layer provided on one surface side of the polarizing layer, which is made of a material containing polycarbonate, and the polarizing layer. And a second resin layer made of a material containing polycarbonate, wherein the first resin layer and the second resin layer have different retardations. It is assumed that such a polarizing laminate is used in a curved state, for example. In this case, the resin layer having a high retardation is positioned on the curved convex side and the resin layer having a low retardation is positioned on the curved concave side. When used in a relatively high temperature environment, a resin layer having a high retardation is likely to be deformed in a direction in which the curvature curvature is reduced by heat shrinkage, but a resin layer having a low retardation may be difficult to be deformed by heat shrinkage. it can. That is, the resin layer having a low retardation can exhibit a function of suppressing thermal deformation of the resin layer having a high retardation. As a result, excessive deformation due to heat can be prevented as the entire polarizing laminate.

DESCRIPTION OF SYMBOLS 1 Polarizing laminate 2 Polarizing layer 3 First resin layer 4 Second resin layer 5 First adhesive layer 6 Second adhesive layer

Claims (6)

A polarizing layer;
A first resin layer provided on one surface side of the polarizing layer and made of a material containing polycarbonate;
A second resin layer provided on the other surface side of the polarizing layer and made of a material containing polycarbonate,
The polarizing laminate, wherein the first resin layer and the second resin layer have different retardations. The retardation of the first resin layer is 10 nm or more and 1500 nm or less,
The polarizing laminate according to claim 1, wherein the retardation of the second resin layer is 2000 nm or more and 10,000 nm or less. The polarizing laminate according to claim 2, wherein the ratio of the retardation of the first resin layer to the retardation of the second resin layer is 1/1000 or more and 3/5 or less. The first resin layer has a lower retardation than the second resin layer,
The polarizing laminate according to any one of claims 1 to 3, wherein a ratio of the thickness of the first resin layer to the thickness of the second resin layer is 1/20 or more and 1/2 or less. body. The first resin layer has a lower retardation than the second resin layer,
The polarized light according to any one of claims 1 to 4, which is used in a curved state such that the first resin layer is located on a curved concave side and the second resin layer is located on a curved convex side. Laminate. The polarizing laminate according to claim 5, wherein a curvature radius of the polarizing laminate in the curved state is 40 mm or more and 1000 mm or less.

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