JP2018054999A - Laminate, manufacturing method therefor, polarizing plate, and image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate which exhibits high levels of interlayer adhesion and scratch resistance and offers superior polarizer durability when incorporated in an image display device as a polarizing plate, and to provide a method of manufacturing the same, a polarizing plate using the same, and an image display device.SOLUTION: A laminate is provided comprising a polarizer, moisture-proof layer, and hard coat layer arranged in the described order. The moisture-proof layer is made of a cured product containing a cyclic polyolefin component and an acrylate or methacrylate component as constituents, and the hard coat layer is made of a cured product containing a tri- or more functional acrylate or methacrylate component as a constituent. A method of manufacturing the laminate, a polarizing plate produced using the laminate, and an image display device are also provided herein.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminate, a method for manufacturing the same, a polarizing plate, and an image display device.

An image display device typified by an electroluminescence display (ELD) or a liquid crystal display device (LCD) usually includes a polarizing plate in which various functional layers or optical films are laminated on the surface of a polarizer.
For example, Patent Document 1 discloses that a cyclic polyolefin film obtained by dissolving a cyclic polyolefin resin in an organic solvent, adding an additive thereto, and casting and drying the dope is pasted on the surface of a polarizer. A polarizing plate is described.

JP 2016-14869 A

The above-described image display device is increasingly required to be thin. In addition, the usage environment of image display devices is diversified, including outdoor applications. For this reason, image display devices are required to have high durability capable of stably maintaining good image quality even in a harsh environment as compared with the prior art. Further, high scratch resistance is also required as a characteristic that the polarizing plate disposed on the surface of the image display device is hardly damaged.
It is considered that the above requirement can be satisfied by providing a moisture-proof layer and a hard coat layer for suppressing moisture permeation on the surface of the polarizer. However, the moisture-proof layer and the hard coat layer usually have insufficient interlayer adhesion, and are easily peeled from each other. Therefore, it turned out that the above-mentioned request cannot be satisfied.

  It is an object of the present invention to provide a laminate having a high level of interlayer adhesion and scratch resistance, and exhibiting high polarizer durability by being incorporated into an image display device as a polarizing plate, and a method for producing the same. . Moreover, this invention makes it a subject to provide the polarizing plate and image display apparatus which used this laminated body.

  As a result of intensive studies in view of the above problems, the present inventors have prepared a trifunctional or higher functional acrylate or methacrylate compound and an initiator when producing a laminate having a polarizer, a moisture-proof layer and a hard coat layer in this order. A moisture barrier layer and a hard coat are formed by curing a composition containing a cyclic polyolefin and an acrylate or methacrylate compound and an initiator on the surface of a hard coat layer formed by curing the composition containing the moisture barrier layer. It has been found that the interlayer adhesion with the layer can be improved, and that the resulting laminate is incorporated into an image display device as a polarizing plate to effectively suppress the deterioration of the polarizer and is excellent in scratch resistance. It was. The present invention has been further studied and completed based on these findings.

The above-described problems of the present invention have been solved by the following means.
<1> A laminate having a polarizer, a moisture-proof layer and a hard coat layer in this order,
The moisture-proof layer consists of a cured product comprising a cyclic polyolefin component and an acrylate or methacrylate component as constituent components,
A laminate in which the hard coat layer is formed of a cured product containing a tri- or higher functional acrylate or methacrylate component as a constituent component.
<2> The cured product of the moisture-proof layer is a cured product of a composition containing a cyclic polyolefin, an acrylate or methacrylate compound and an initiator,
The laminate according to <1>, wherein the cured product of the hard coat layer is a cured product of a composition containing a tri- or higher functional acrylate or methacrylate compound and an initiator.
<3> The laminate according to <1> or <2>, in which the ClogP value of the acrylate or methacrylate component in the cured product forming the moisture-proof layer is 3.0 to 7.0.
<4> The content of the acrylate or methacrylate component in the cured product forming the moisture-proof layer is 5 to 60% by mass with respect to the total mass of the cyclic polyolefin component and the acrylate or methacrylate component <1> to <3 > The laminated body as described in any one of>.
<5> The laminate according to any one of <1> to <4>, wherein the acrylate or methacrylate component in the cured product forming the moisture-proof layer includes an aliphatic ring structure.
The laminated body as described in any one of <1>-<5> whose glass transition temperature Tg of a <6> cyclic polyolefin component is 60-160 degreeC.
<7> Any one of <1> to <6>, wherein the average value of the number of reactive groups / molecular weight of the trifunctional or higher functional acrylate or methacrylate component in the cured product forming the hard coat layer is 0.0070 to 0.0095. The laminated body as described in one.
The laminated body as described in any one of <1>-<7> whose film thickness of a <8> moisture-proof layer is 2-30 micrometers, and whose film thickness of a hard-coat layer is 2-15 micrometers.
<9> A polarizing plate comprising the laminate according to any one of <1> to <8>.
<10> An image display device having the polarizing plate according to <9>.
<11> A method for producing a laminate having a polarizer, a moisture-proof layer and a hard coat layer in this order,
Curing a composition containing a tri- or higher functional acrylate or methacrylate compound and an initiator on a peelable support to form a hard coat layer;
Curing a composition containing a cyclic polyolefin, an acrylate or methacrylate compound and an initiator on the surface of the hard coat layer to form a moisture-proof layer;
A step of laminating a moisture-proof layer and a polarizer of a laminated support in which a hard coat layer and a moisture-proof layer are formed in this order on a peelable support, and peeling the peelable support;
The manufacturing method of the laminated body containing this.
<12> The method for producing a laminate according to <11>, wherein the peelable support is made of a polyethylene terephthalate resin.
The manufacturing method of the laminated body as described in <11> or <12> whose film thickness of <13> peelable support body is 10-100 micrometers.

The laminate of the present invention has a high level of interlayer adhesion and scratch resistance, and exhibits a high degree of polarizer durability when incorporated into an image display device as a polarizing plate.
Moreover, the polarizing plate and image display apparatus of this invention can suppress the deterioration of a polarizer effectively using the laminated body which shows said characteristic, and are excellent also in scratch resistance.
Furthermore, the manufacturing method of the laminated body of this invention can manufacture the laminated body which shows said characteristic with sufficient productivity.
In the present specification, the degree of suppressing the deterioration of the polarizer is referred to as “polarizer durability” or “polarizing plate durability”.

FIG. 1 is a cross-sectional view showing a preferred embodiment of the laminate of the present invention. FIG. 2 is a cross-sectional view showing a preferred embodiment of the polarizing plate of the present invention. FIG. 3 is a schematic view showing an outline of an embodiment of a liquid crystal display device provided with the polarizing plate of the present invention.

  In the present specification, the numerical value range represented by “to” means that the numerical values described before and after it are included as the lower limit value and the upper limit value.

  In the present specification, when there are a plurality of substituents, linking groups, etc. (hereinafter referred to as substituents, etc.) indicated by specific symbols, or when a plurality of substituents etc. are specified simultaneously or alternatively, It means that a substituent etc. may mutually be same or different. The same applies to the definition of the number of substituents and the like. In addition, when a plurality of substituents are adjacent, particularly adjacent to each other, it means that they may be connected to each other or condensed to form a ring.

In this specification, about the display of a compound, it uses in the meaning containing its salt and its ion other than a compound itself. In addition, it means that a part of the structure is changed as long as the target effect is not impaired. Examples of the salt of the compound include an acid addition salt of the compound formed with the compound and an inorganic acid or an organic acid, or a base addition salt of the compound formed with the compound and an inorganic base or an organic base. Is mentioned. In addition, examples of the ion of the compound include an ion generated by dissolving a salt of the above-described compound in water or a solvent.
In the present specification, a substituent that does not specify substitution or non-substitution (the same applies to a linking group) means that the group may have an arbitrary substituent as long as the desired effect is not impaired. is there. This is synonymous with a compound or repeating unit in which substitution or non-substitution is not specified.
Further, in the present specification, when simply referred to as “substituent”, a group selected from the following substituent group T may be mentioned unless otherwise specified. In addition, when only a substituent having a specific range is described (for example, when only “alkyl group” is described), a corresponding group of the following substituent group T (in the above case, an alkyl group) Preferred ranges and specific examples in apply.
In the present specification, when the number of carbon atoms of a certain group is defined, this number of carbons means the total number of carbon atoms in the group. That is, when this group has a further substituent, it means the total number of carbon atoms including this substituent.
In this specification, when a certain group can form an acyclic skeleton and a cyclic skeleton, unless otherwise specified, the certain group includes a group having an acyclic skeleton and a group having a cyclic skeleton. For example, unless otherwise specified, an alkyl group includes a straight chain alkyl group, a branched alkyl group, and a cyclic (cyclo) alkyl group. When a certain group forms a cyclic skeleton, the lower limit of the carbon number in the cyclic skeleton group is preferably 3 or more, and more preferably 5 or more, regardless of the lower limit of the carbon number specifically described in the certain group.

Substituent group T:
An alkyl group (preferably having 1 to 20 carbon atoms, more preferably 1 to 12 carbon atoms, particularly preferably 1 to 8 carbon atoms such as methyl group, ethyl group, isopropyl group, tert-butyl group, n-octyl group, n -Decyl group, n-hexadecyl group, etc. In the case of a cycloalkyl group, the carbon number is preferably 3-20, more preferably 3-12, and particularly preferably 3-8. A propyl group, a cyclopentyl group, a cyclohexyl group, etc.), an alkenyl group (preferably having a carbon number of 2-20, more preferably 2-12, particularly preferably 2-8, such as a vinyl group, an allyl group, 2 -Butenyl group, 3-pentenyl group, etc.), alkynyl group (preferably having 2 to 20 carbon atoms, more preferably 2 to 12 carbon atoms, particularly preferably 2 to 2 carbon atoms). For example, a propargyl group, a 3-pentynyl group, etc.), an aryl group (preferably having 6 to 30 carbon atoms, more preferably 6 to 20 carbon atoms, particularly preferably 6 to 12 carbon atoms such as a phenyl group or biphenyl). Group, a naphthyl group, etc.), an amino group (preferably having a carbon number of 0 to 20, more preferably 0 to 10, particularly preferably 0 to 6, such as an amino group, a methylamino group, a dimethylamino group, A diethylamino group, a dibenzylamino group, etc.), an alkoxy group (preferably having a carbon number of 1-20, more preferably 1-12, particularly preferably 1-8, for example, a methoxy group, an ethoxy group, a butoxy group. An aryloxy group (preferably having 6 to 20 carbon atoms, more preferably 6 to 16 carbon atoms, particularly preferably 6 to 12 carbon atoms, For example, a phenyloxy group, 2-naphthyloxy group, etc.), an acyl group (preferably having 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, particularly preferably 1 to 12 carbon atoms such as an acetyl group and a benzoyl group). , A formyl group, a pivaloyl group, etc.), an alkoxycarbonyl group (preferably having a carbon number of 2-20, more preferably 2-16, particularly preferably 2-12, such as a methoxycarbonyl group, an ethoxycarbonyl group, etc. An aryloxycarbonyl group (preferably having a carbon number of 7 to 20, more preferably 7 to 16, particularly preferably 7 to 10, such as a phenyloxycarbonyl group), an acyloxy group ( Preferably it has 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, particularly preferably 2 to 10 carbon atoms. A toxi group, a benzoyloxy group, etc. are mentioned. ), An acylamino group (preferably having 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, particularly preferably 2 to 10 carbon atoms such as acetylamino group and benzoylamino group), alkoxycarbonylamino group (preferably Has 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, particularly preferably 2 to 12 carbon atoms, such as a methoxycarbonylamino group, and an aryloxycarbonylamino group (preferably 7 to 20 carbon atoms). Preferably they are 7-16, Most preferably, it is 7-12, for example, a phenyloxycarbonylamino group etc. are mentioned, for example, A sulfonylamino group (preferably C1-C20, More preferably, it is 1-16, Especially preferably, it is. 1 to 12, for example, methanesulfonylamino group, benzenesulfonylamino group, etc. ), A sulfamoyl group (preferably having a carbon number of 0 to 20, more preferably 0 to 16, particularly preferably 0 to 12, such as a sulfamoyl group, a methylsulfamoyl group, a dimethylsulfamoyl group, and a phenylsulfamoyl group. A carbamoyl group (preferably having 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, particularly preferably 1 to 12 carbon atoms such as a carbamoyl group, a methylcarbamoyl group, a diethylcarbamoyl group, and a phenylcarbamoyl group). ), An alkylthio group (preferably having 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, particularly preferably 1 to 12 carbon atoms such as a methylthio group and an ethylthio group), an arylthio group ( Preferably 6-20 carbon atoms, more preferably 6-16, particularly preferably 6-12. Yes, for example, a phenylthio group, etc.), a sulfonyl group (preferably having a carbon number of 1-20, more preferably 1-16, particularly preferably 1-12, for example, a mesyl group, a tosyl group, etc.). ), A sulfinyl group (preferably having a carbon number of 1-20, more preferably 1-16, particularly preferably 1-12, such as methanesulfinyl group, benzenesulfinyl group, etc.), urethane group, ureido group ( Preferably it is C1-C20, More preferably, it is 1-16, Most preferably, it is 1-12, for example, a ureido group, a methylureido group, a phenylureido group etc. are mentioned), phosphoric acid amide groups (preferably carbon) The number is 1 to 20, more preferably 1 to 16, and particularly preferably 1 to 12. For example, diethyl phosphoric acid amide, phenyl phosphoric acid Examples include amides. ), Hydroxy group, mercapto group, halogen atom (eg fluorine atom, chlorine atom, bromine atom, iodine atom), cyano group, sulfo group, carboxy group, nitro group, hydroxamic acid group, sulfino group, hydrazino group, imino group, Heterocyclic group (preferably having a carbon number of 1 to 30, more preferably 1 to 12, and examples of the ring-constituting hetero atom include a nitrogen atom, an oxygen atom and a sulfur atom. Specific examples thereof include an imidazolyl group, a pyridyl group, a quinolyl group, a furyl group, a piperidyl group, a morpholino group, a benzoxazolyl group, a benzimidazolyl group, and a benzthiazolyl group. And a silyl group (preferably having 3 to 40 carbon atoms, more preferably 3 to 30 carbon atoms, particularly preferably 3 to 24 carbon atoms, In example, a trimethylsilyl group, triphenylsilyl group, etc.).
These substituents may further have a substituent. Moreover, when there are two or more substituents, they may be the same or different. Further, adjacent substituents may be connected to each other to form a ring.

  Preferred embodiments of the present invention are described below.

[Laminate]
First, the layer structure of the laminate of the present invention will be described.
The laminated body of this invention has a polarizer, a moisture-proof layer, and a hard-coat layer in this order.
The moisture-proof layer and the hard coat layer only have to be provided on one surface of the polarizer, respectively, and may be provided on both surfaces.
The moisture-proof layer and the hard coat layer are provided adjacent to each other. In the present invention, providing adjacently means providing without interposing an adhesive layer or an adhesive layer for adhering or adhering both layers between the moisture-proof layer and the hard coat layer, that is, laminating both layers directly. It is provided in the (superposed) state.
The polarizer and the moisture-proof layer may be provided adjacent to each other or may be provided via another layer such as an adhesive layer.

In the laminate of the present invention, each of the polarizer, the moisture-proof layer and the hard coat layer may be a single layer or multiple layers.
If the laminated body of this invention has the said layer structure, another structure will not be specifically limited.

  As shown in FIG. 1, the laminate 10 as a preferred embodiment of the present invention is adjacent to the polarizer 11, the moisture-proof layer 12 provided on one surface of the polarizer 11, and the surface of the moisture-proof layer 12. And a hard coat layer 13 provided.

The reason why the laminate of the present invention has high interlayer adhesion between the moisture-proof layer and the hard coat layer, excellent scratch resistance, and high polarizer durability is not clear, but is considered as follows.
In the laminate of the present invention, the moisture-proof layer is formed of a cyclic polyolefin, an acrylate or methacrylate compound, and an initiator on the surface of a hard coat layer formed by curing a composition containing a tri- or higher functional acrylate or methacrylate compound and an initiator. It is formed by curing a composition containing. This is considered to cause a strong interaction with the surface of the hard coat layer when the moisture-proof layer is formed (when the acrylate or methacrylate compound is cured). For this reason, the adhesion between the hard coat layer and the moisture-proof layer is strengthened. And even if the said interaction arises, the characteristic of a hard-coat layer is not impaired and high scratch resistance is maintained.
In general, a polymer of a cyclic polyolefin and an acrylate or methacrylate compound is difficult to mix with each other. However, the moisture-proof layer of the laminate of the present invention is composed of a cured product containing a cyclic polyolefin component and an acrylate or methacrylate component as components, which are obtained by curing a composition containing a cyclic polyolefin and an acrylate or methacrylate compound. Therefore, it is considered that the function function as a moisture-proof layer is sufficiently exhibited to show a high degree of polarizer durability.

<Polarizer>
The polarizer which comprises the laminated body of this invention is demonstrated.
The polarizer is not particularly limited as long as it comprises at least a dichroic dye and a resin, and those usually used for polarizing plates can be used. For example, a film obtained by immersing and stretching a polyvinyl alcohol film in an iodine solution can be used. When using a polarizer obtained by immersing and stretching a polyvinyl alcohol film in an iodine solution, for example, the moisture-proof layer can be bonded to at least one surface of the polarizer using an adhesive.
The thickness of the polarizer is preferably 5 to 30 μm.

<Dampproof layer>
The moisture-proof layer is made of a cured product having a cyclic polyolefin component and an acrylate or methacrylate component as constituent components. This cured product is a cured product obtained by curing a composition containing a cyclic polyolefin, an acrylate or methacrylate compound, and an initiator. Although details of the cured product (cured state of the above components, etc.) are not yet clear, it is not a mere mixture of a polymer of an acrylate or methacrylate compound and a cyclic polyolefin, but an acrylate or methacrylate by an initiator in the presence of the cyclic polyolefin. The compound is cured, and is considered to be a cured product having the above components as constituent components.
In the cured product, the cyclic polyolefin component and the acrylate or methacrylate component are components derived from the cyclic polyolefin and the acrylate or methacrylate compound in the composition, respectively.

In the present invention, the “moisture-proof layer” means a layer containing 50% by mass or more of a cured product containing a cyclic polyolefin component and an acrylate or methacrylate component as constituent components. The cured product content is preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, and particularly preferably 85% by mass or more. The higher the cured product content, the more the polarizer durability and interlayer adhesion can be improved, which is preferable. Therefore, the content of the cured product in the moisture-proof layer may be about 100% by mass, and is usually 99% by mass or less. When the said hardened | cured material content in a moisture-proof layer is less than 100 mass%, the remainder can contain the decomposition product of an initiator, or the various additives mentioned later.
In the present invention, the term “moisture-proof layer” simply means a layer capable of suppressing moisture permeation, and is merely used to facilitate understanding of the present invention. The “moisture-proof layer” includes all the layers made of the cured product, regardless of the degree to which moisture permeation is suppressed. That is, in judging the gist and technical scope of the present invention, the term “moisture-proof layer” is not considered as an invention-specific matter for limiting the present invention.

  The moisture-proof layer may contain an additive to be described later as long as the effects of the present invention are not impaired.

  Although the film thickness of a moisture-proof layer is not specifically limited, Preferably it is 2-30 micrometers, More preferably, it is 2-25 micrometers, More preferably, it is 5-20 micrometers.

<Hard coat layer>
A hard-coat layer consists of hardened | cured material which has a trifunctional or more than trifunctional acrylate or methacrylate component as a structural component. This hardened | cured material is a hardened | cured material which hardened | cured the composition containing the acrylate or methacrylate compound more than trifunctional, and an initiator. The details of the cured product are not yet clear, but it contains a polymer of a trifunctional or higher acrylate or methacrylate compound (referred to as a trifunctional or higher functional (meth) acrylate compound), and has a trifunctional or higher functionality existing in the vicinity of the surface. It is considered that the (meth) acrylate compound or a polymer thereof interacts with the moisture-proof layer described above. Examples of the interaction include a reaction with a (meth) acrylate compound present in the vicinity of the surface of the moisture-proof layer or a cured product thereof.
In the cured product, the trifunctional or higher functional acrylate or methacrylate component is a component derived from the trifunctional or higher functional (meth) acrylate compound in the composition.

  In the present invention, the “hard coat layer” means a layer containing 50% by mass or more of a cured product containing a trifunctional or higher functional acrylate or methacrylate component as a constituent component. The cured product content is preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, and particularly preferably 85% by mass or more. The higher the content of the cured product, the higher the interlayer adhesion and the scratch resistance, which is preferable. Therefore, the content of the cured product in the hard coat layer may be 100% by mass, and is usually 99% by mass or less. When the said hardened | cured material content in a hard-coat layer is less than 100 mass%, the remainder can contain the decomposition product of an initiator, or various additives.

The hard coat layer should just contain at least 1 sort of the hardened | cured material of the trifunctional or more than (meth) acrylate component, and may contain 2 or more types.
The cured product of the tri- or higher functional (meth) acrylate component may be a cured product of only the tri- or higher-functional (meth) acrylate component, or the trifunctional or higher-functional (meth) acrylate component and the bifunctional (meth) acrylate. A cured product with the component may be used. Details will be described later.

  The hard coat layer may contain an additive described later as long as the effects of the present invention are not impaired.

  Although the film thickness of a hard-coat layer is not specifically limited, Preferably it is 2-15 micrometers, More preferably, it is 3-10 micrometers, More preferably, it is 5-10 micrometers.

<Thickness of laminate>
Although the film thickness of the laminated body of this invention can be suitably determined according to a use, it can be 5-100 micrometers, for example. When the thickness is 5 μm or more, the handling property when producing a web-like film is improved, which is preferable. Moreover, by setting it as 100 micrometers or less, it becomes easy to respond to a humidity change and it becomes easy to maintain an optical characteristic.
In order to meet the above-described demand for thinning of the image display device, the laminate is preferably thinned. In this case, the thickness of the laminate is preferably, for example, 8 to 80 μm, and 10 to 70 μm. Is more preferable.

<Use of laminate>
The laminated body of the present invention having the above layer structure can be used as a polarizing plate of an image forming apparatus as it is or after another optical film or the like is further laminated as will be described later.

[Polarizer]
The polarizing plate of the present invention includes the laminate of the present invention, and if necessary, the surface of the polarizer not provided with a moisture-proof layer, or the surface of the hard coat layer, a protective film of the polarizer or a specific function You may have various optical films, such as various functional layers specialized in. As an optical film, a polarizing plate protective film having a functional layer such as an antireflection film, a brightness enhancement film, a forward scattering layer, an antiglare (antiglare) layer, an antifouling layer or an antistatic layer for improving the visibility of a display. Can be mentioned. The antireflection film, the brightness enhancement film, the other functional optical film, the forward scattering layer, and the antiglare layer for functionalization are described in paragraph numbers 0257 to 0276 of JP-A-2007-86748, and these A functionalized polarizing plate can be manufactured based on the description.

It is also preferable that the polarizing plate of the present invention is constituted by laminating a separate film on the surface. The separate film is used for the purpose of protecting the polarizing plate at the time of shipping the polarizing plate and at the time of product inspection. The separate film is used for the purpose of covering the adhesive layer to be bonded to the liquid crystal plate, and is used on the surface side to bond the polarizing plate to the liquid crystal plate.
As a polarizing plate of this invention, what provided various optical films on the surface of the polarizer in the laminated body of this invention is mentioned, for example. A polarizing plate 15 shown in FIG. 2 as a preferred embodiment of the polarizing plate of the present invention includes a laminate 10 of the present invention and a protective film 16 provided on the surface of the polarizer 11 opposite to the moisture-proof layer 12. Have. The protective film 16 is not particularly limited as long as it is a commonly used film. For example, a cycloolefin film (trade name: Arton, manufactured by JSR Corporation) or a cyclic polyolefin film (trade name: ZEONOR ZB12, manufactured by ZEON Corporation) is used. Can be used.

  The polarizing plate of the present invention may be in the form of a film piece cut to a size that can be incorporated into a display device as it is. Moreover, the form of the aspect (for example, aspect | mode whose roll length is 2500 m or more or 3900 m or more) produced not only into this aspect but by the continuous production and wound up in roll shape is also contained. In order to use for a large-screen liquid crystal display device, the width of the polarizing plate is preferably 1470 mm or more.

<Physical properties and characteristics of laminate or polarizing plate>
The laminate or polarizing plate of the present invention preferably has the following physical properties and characteristics.

(Interlayer adhesion)
The laminate or polarizing plate of the present invention is excellent in interlayer adhesion between the hard coat layer and the moisture-proof layer as described above. Specifically, in the interlayer adhesion test (cross-cut test) shown in the examples, it is preferable that peeling of the cross-cut is 30 sheets or less.

(Degree of polarization)
The laminate or polarizing plate of the present invention preferably has a polarization degree of 95.0% or more, more preferably 98% or more, and further preferably 99.5% or more.
In the present invention, the degree of polarization of the polarizing plate can be measured using an automatic polarizing film measuring device VAP-7070 manufactured by JASCO Corporation. More specifically, it can be measured by the method described in the Example column.

(Change in polarization degree)
The laminate or polarizing plate of the present invention is excellent in polarizer durability under wet heat aging conditions. For this reason, the amount of change in polarization degree before and after the polarizer durability test described later is small.
The laminate or polarizing plate of the present invention is measured for orthogonal transmittance and parallel transmittance using an automatic polarizing film measuring device VAP-7070 manufactured by JASCO Corporation, and the degree of polarization is calculated by the above formula. It is preferable that the amount of change in the degree of polarization when stored for 500 hours in an environment with a relative humidity of 85% is less than 1%.

(Scratch resistance)
The laminate or polarizing plate of the present invention exhibits a high scratch resistance such that the number of scratches that can be confirmed on the surface of the hard coat layer is 5 or less in a scratch resistance test in Examples described later.

(Haze)
The laminate or polarizing plate of the present invention preferably has a total haze value of less than 3%, more preferably 1% or less, and particularly preferably less than 0.5%. Such a laminate showing all haze values is excellent in transparency and is suitable as a film member of a liquid crystal display device. Although the lower limit of all haze values is not specifically limited, For example, it is 0.001% or more. The total haze value is a value measured by the method described in the examples.

(Residual solvent amount)
In the laminate or polarizing plate of the present invention, the residual solvent amount (% by mass) of the solvent remaining in the hard coat layer and moisture-proof layer is preferably less than 1% by mass, and less than 0.5% by mass. It is more preferable. The residual solvent amount is a value measured by the measurement method described in the examples described later.

(Moisture permeability)
The moisture permeability of the laminate or polarizing plate of the present invention is measured under the conditions of 85 ° C. and relative humidity of 85% based on the description of JIS Z 0208.
The moisture permeability of the laminate of the present invention is preferably less than 500 g / (m ² · 6hours), more preferably less than 400 g / (m ² · 6hours), and less than 300 g / (m ² · 6hours). More preferably, it is particularly preferably less than 200 g / (m ² · 6hours). By controlling the moisture permeability of the laminate to the above range, the deterioration of the polarizer and the warpage of the liquid crystal cell even after the normal temperature and high humidity and high temperature and high humidity environment of the image display device equipped with the laminate of the present invention. Alternatively, display unevenness during black display can be suppressed.

  The laminate or polarizing plate of the present invention is excellent in releasability between a hard coat layer and a releasable support used in, for example, a laminate production method described later. For example, the peeling force when the hard coat layer is peeled off at 90 ° with respect to the peelable support at a speed of 300 mm / min is preferably less than 5 N / 25 mm, more preferably less than 2 N / 25 mm. preferable. The lower limit value of the peeling force is not particularly limited, but is preferably 0.001 N / 25 mm or more, and more preferably 0.01 N / 25 mm or more. If the peeling force is 0.001 N / 25 mm or more, peeling outside the peeling process can be prevented, and if it is less than 5 N / 25 mm, bad peeling in the peeling process (for example, zipping, cracking of hard coat layer). Can be prevented.

(Other characteristics)
Other preferable optical characteristics of the laminate or polarizing plate of the present invention are described in paragraphs [0238] to [0255] of JP-A-2007-086748, and it is preferable to satisfy these characteristics.

[Manufacturing method of laminate and polarizing plate]
Next, the manufacturing method of the laminated body of this invention is demonstrated with the manufacturing method of a polarizing plate.
The laminate production method of the present invention (sometimes referred to as the production method of the present invention) is a hard coat obtained by curing a composition containing a trifunctional or higher acrylate or methacrylate compound and an initiator on a peelable support. A step of forming a layer, a step of curing a composition containing a cyclic polyolefin, an acrylate or methacrylate compound and an initiator on the surface of the hard coat layer to form a moisture proof layer, a hard coat layer on the peelable support, and A step of laminating the moisture-proof layer of the laminated support in which the moisture-proof layer is formed in this order and the polarizer, and peeling the peelable support.
Thereby, the laminated body of this invention which has the above-mentioned outstanding characteristic can be manufactured.

In the production method of the present invention, when the laminated support is bonded to the polarizer, or after the laminated support is bonded to the polarizer and before the peelable support is peeled off, The above-mentioned optical film can also be bonded (form a functional layer) on the surface opposite to the surface on which the laminated support is bonded. In this case, a polarizing plate comprising the optical film and the laminate of the present invention is produced.
On the other hand, after manufacturing the laminate of the present invention, the above-described optical film can be bonded to the surface of the polarizer opposite to the surface on which the stacked support is bonded.
In the present invention, in terms of productivity and the like, it is preferable to bond an optical film when the laminated support is bonded to a polarizer. When the laminated support is bonded to the polarizer, the optical film is bonded. In addition to the mode in which the optical film is bonded simultaneously with the lamination support being bonded to the polarizer, the laminated support is bonded. The mode which bonds an optical film before or after is included.

  In carrying out the production method of the present invention, a composition for forming a moisture-proof layer (referred to as a composition for forming a moisture-proof layer) and a composition for forming a hard coat layer (referred to as a composition for forming an HC layer) are used. Prepare each.

<Composition for moisture-proof layer formation and its preparation>
The composition for forming a moisture-proof layer contains a cyclic polyolefin, an acrylate or methacrylate compound, an initiator, and, if necessary, a solvent and various additives.

− Cyclic polyolefin −
The cyclic polyolefin may be a polymer of a cyclic olefin compound, and a known one is not particularly limited and can be used without limitation.
The cyclic olefin compound forming the cyclic polyolefin is not particularly limited as long as it is a compound having a ring structure containing a carbon-carbon double bond. For example, a monocyclic cyclic olefin compound other than norbornene compound and norbornene compound, cyclic Examples thereof include conjugated diene compounds and vinyl alicyclic hydrocarbon compounds.
Examples of the cyclic polyolefin include (1) a polymer containing a structural unit derived from a norbornene compound, (2) a polymer containing a structural unit derived from a monocyclic olefin compound other than the norbornene compound, and (3) cyclic A polymer containing a structural unit derived from a conjugated diene compound, (4) a polymer containing a structural unit derived from a vinyl alicyclic hydrocarbon compound, and a structural unit derived from each compound of (1) to (4) Hydrides of polymers containing In the present invention, the polymer containing a structural unit derived from a norbornene compound and the polymer containing a structural unit derived from a monocyclic olefin compound include a ring-opening polymer of each compound.

  Although it does not specifically limit as cyclic polyolefin, The polymer which has a structural unit derived from the norbornene compound represented by the following general formula (A-II) or (A-III) is preferable. A polymer having a structural unit represented by the following general formula (A-II) is an addition polymer of a norbornene compound, and a polymer having a structural unit represented by the following general formula (A-III) is a norbornene compound. It is a ring-opening polymer.

In general formula, m is an integer of 0-4, and 0 or 1 is preferable.
R ^{3 to} R ⁶ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
In the present invention, the hydrocarbon group is not particularly limited as long as it is a group composed of a carbon atom and a hydrogen atom, and examples thereof include an alkyl group, an alkenyl group, an alkynyl group, and an aryl group (aromatic hydrocarbon group). Among these, an alkyl group or an aryl group is preferable.
X ² and X ³ , Y ² and Y ³ are each independently a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms substituted with a halogen atom,- _{^{(CH 2) nCOOR 11, -}} (CH 2) nOCOR 12, - (CH 2) nNCO, - (CH 2) nNO 2, - (CH 2) nCN, - (CH 2) nCONR 13 R 14, - (CH _{^{2) nNR 13 R 14, -}} (CH 2) nOZ, - (CH 2) nW, or the ^{X 2} and ^{Y 2} or ^{X 3} and ^{Y 3} bonded to form together, (- _{CO) 2} O or ( _-CO) represents a 2 ^{NR 15.}
Here, R ^{11 to} R ¹⁵ each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, Z represents a hydrocarbon group or a hydrocarbon group substituted with a halogen, and W represents Si ( R ¹⁶ ) _p D _(3-p) (R ¹⁶ represents a hydrocarbon group having 1 to 10 carbon atoms, D is a halogen atom, —OCOR ¹⁷ or —OR ¹⁷ (R ¹⁷ is a hydrocarbon having 1 to 10 carbon atoms) Group), p is an integer of 0-3. n is an integer of 0 to 10, preferably 0 to 8, and more preferably 0 to 6.

In General Formula (A-II) or (A-III), R ^{3 to} R ⁶ are each preferably a hydrogen atom or —CH _{3, and} more preferably a hydrogen atom in terms of moisture permeability.
X ² and Y ² are each preferably a hydrogen atom, —CH ₃ , or —C ₂ H _{5, and} more preferably a hydrogen atom in terms of moisture permeability.
X ³ and Y ³ are each preferably a hydrogen atom, a halogen atom (particularly a chlorine atom) or — (CH ₂ ) nCOOR ¹¹ (particularly —COOCH ₃ ), and more preferably a hydrogen atom in terms of moisture permeability.
Other groups are appropriately selected.
In the general formula (A-II) or (A-III), m is 0 or 1, and R ^{3 to} R ⁶ , X ^{2 to} X ³ and Y ^{2 to} Y ³ are all hydrogen atoms. Particularly preferred.

  The polymer having the structural unit represented by the general formula (A-II) or (A-III) may further contain at least one structural unit represented by the following general formula (AI).

In the general formula, R ¹ and R ² each independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and X ¹ and Y ¹ each independently represent a hydrogen atom or a carbon atom having 1 to 10 carbon atoms. hydrocarbon group, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms substituted with a halogen _{^{atom, - (CH 2) nCOOR 11}} , - (CH 2) nOCOR 12, - (CH 2) nNCO, - (CH 2 ^{_{) nNO 2, - (CH 2}} ) nCN, - (CH 2) nCONR 13 R 14, - (CH 2) nNR 13 R 14, - (CH 2) nOZ, - (CH 2) nW, or, ^{X 1} and Y ¹ are combined to form one another, represents - _{(CO) 2} O or _(-CO) 2 ^{NR 15.}
Here, R ^{11 to} R ¹⁵ each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, Z represents a hydrocarbon group or a hydrocarbon group substituted with a halogen, and W represents Si ( R ¹⁶ ) _p D _(3-p) (R ¹⁶ represents a hydrocarbon group having 1 to 10 carbon atoms, D is a halogen atom, —OCOR ¹⁷ or —OR ¹⁷ (R ¹⁷ is a hydrocarbon having 1 to 10 carbon atoms) Group), p is an integer of 0-3. n represents an integer of 0 to 10.

  From the viewpoint of moisture permeability and interlayer adhesion to the hard coat layer, the cyclic polyolefin having the structural unit represented by the general formula (A-II) or (A-III) is a structural unit derived from the above norbornene compound. Is preferably 90% by mass or less, more preferably 30 to 85% by mass, still more preferably 50 to 79% by mass, and 60 to 75% by mass with respect to the total mass of the cyclic polyolefin. Most preferably. Here, the ratio of the structural unit derived from the norbornene compound represents an average value in the cyclic polyolefin.

Addition (co) polymers of norbornene compounds are described in JP-A No. 10-7732, JP-T-2002-504184, U.S. Published Patent Publication No. 200429157157A1, or International Publication No. 2004/070463.
The norbornene compound polymer is obtained by addition polymerization of norbornene compounds (for example, norbornene polycyclic unsaturated compounds).

In addition, as a polymer of norbornene compound, a norbornene compound and an olefin such as ethylene, propylene and butene, conjugated dienes such as butadiene and isoprene, nonconjugated dienes such as ethylidene norbornene, acrylonitrile, acrylic acid, Specific examples include a copolymer obtained by addition copolymerization with an ethylenically unsaturated compound such as acrylic acid, maleic anhydride, acrylic acid ester, methacrylic acid ester, maleimide, vinyl acetate or vinyl chloride. Among these, a copolymer with ethylene is preferable.
Such norbornene compound addition (co) polymers are sold under the trade name of Apel by Mitsui Chemicals, and have different glass transition temperatures (Tg), for example, APL8008T (Tg70 ° C.), APL6011T (Tg105). ° C), APL6013T (Tg125 ° C), APL6015T (Tg145 ° C), or the like. In addition, pellets such as TOPAS 8007, 6013, and 6015 are commercially available from Polyplastics. Furthermore, Appear 3000 is commercially available from Ferrania.

  A commercially available product can be used as the polymer of the norbornene compound. For example, it is commercially available from JSR under the trade name Arton G or Arton F, and from Zeon Japan under the trade name Zeonor ZF14, ZF16, Zeonex 250 or Zeonex 280. Yes.

  A hydride of a polymer of a norbornene compound can be synthesized by subjecting a norbornene compound or the like to addition polymerization or metathesis ring-opening polymerization, and then hydrogenating it. Examples of the synthesis method include JP-A-1-240517, JP-A-7-196736, JP-A-60-26024, JP-A-62-19801, JP-A-2003-159767, or JP-A-2004-309799. It is described in each gazette.

The mass average molecular weight of the cyclic polyolefin is not particularly limited, but is preferably 10,000 to 1,000,000, more preferably 20,000 to 800,000, still more preferably 30,000 to 500,000, and 50,000 to 300,000. Particularly preferred is 50,000 to 200,000. When the molecular weight of the cyclic polyolefin is increased, the heat resistance or the mechanical strength is improved. The molecular weight of the cyclic polyolefin can be measured under the following conditions.
As the weight average molecular weight, a weight average molecular weight measured in terms of polystyrene by Gel Permeation Chromatography (GPC) was adopted. Specific measurement conditions are shown below.
-Measurement conditions-
GPC device: GPC device manufactured by Tosoh Corporation (HLC-8320GPC, Ecosec)
Column: TSK gel SuperHZM-H, TSK gel SuperHZ4000, TSK gel SuperHZ2000 combined use (made by Tosoh, 4.6 mm ID (inner diameter) x 15.0 cm)
Eluent: Tetrahydrofuran (THF)
Measurement temperature: 25 ° C
Carrier flow rate: 0.35 mL / min
Sample concentration: 0.1% by mass
Detector: RI (refractive index) detector

In the present invention, the glass transition temperature (Tg) of the cyclic polyolefin is not particularly limited. As Tg increases, the effect of improving the durability of the polarizer increases. On the other hand, when Tg decreases, the effect of reducing the residual solvent amount increases. In the point which can make balance of improvement of polarizer durability and reduction of the amount of residual solvent in balance, it is preferred that it is 60-160 ° C, for example, it is more preferred that it is 60-150 ° C, and it is 60-130 ° C. It is particularly preferred.
The Tg of the cyclic polyolefin can be measured using a differential scanning calorimeter. Specifically, using a differential scanning calorimeter DSC7000X (trade name, manufactured by Hitachi High-Tech Science Co., Ltd.), measurement was performed under a nitrogen gas atmosphere under a temperature increase rate of 20 ° C./min, and the resulting time The temperature at the point where the peak top temperature of a differential DSC (Differential scanning calorimetry) curve (DDSC curve) and the tangent line of each DSC curve at a temperature of the peak top temperature of −20 ° C. intersect is defined as Tg of the cyclic polyolefin.

The moisture-proof layer forming composition contains at least one cyclic polyolefin.
The content of the cyclic polyolefin in the moisture-proof layer forming composition is not particularly limited, but if it is too large, interlayer adhesion may be lowered. 40-95 mass% is preferable with respect to the total mass of cyclic polyolefin and an acrylate or a methacrylate compound, and 45-90 mass% is more preferable in the point which can improve balance between interlayer adhesion and reduction of haze in a balanced manner. The range of 50 to 85% by mass is more preferable.

-Acrylate or methacrylate compounds-
An acrylate or methacrylate compound (referred to as (meth) acrylate compound) has at least two (meth) acryloyloxy groups and a group to which these (meth) acryloyloxy groups are bonded.
The number of (meth) acryloyloxy groups contained in the (meth) acrylate compound is not particularly limited as long as it is two or more, but two is preferable.
The group to which the (meth) acryloyloxy group is bonded is not particularly limited, and examples thereof include a chain aliphatic group, a cyclic aliphatic group, and an aromatic group. Among these, from the viewpoint of polarizer durability, a cyclic aliphatic group is preferable, and a group having an aliphatic ring structure is more preferable.

The aliphatic ring structure is not particularly limited as long as it is a structure derived by removing a hydrogen atom from an aliphatic cyclic compound, preferably a structure derived from an alicyclic compound having 7 or more carbon atoms, and more A structure derived from an alicyclic compound having 10 or more carbon atoms is preferred, and a structure derived from an alicyclic compound having 12 or more carbon atoms is more preferred. The upper limit of the carbon number of the alicyclic compound is preferably 40 or less, more preferably 30 or less. As the aliphatic ring structure, a structure composed of a cyclic aliphatic hydrocarbon group derived from a polycyclic compound such as bicyclic or tricyclic is particularly preferable. More preferably, the basic structure of the compound described in the claims of Japanese Patent Application Laid-Open No. 2006-215096, the basic structure of the compound described in Japanese Patent Application Laid-Open No. 2001-10999, or the basic structure of an adamantane compound may be mentioned. .
The number of rings forming the cycloaliphatic hydrocarbon group is not particularly limited, but usually 2 to 10 are preferable, 2 to 8 are more preferable, and 3 to 8 are more preferable.

  Specific examples of the cyclic aliphatic hydrocarbon group include groups derived from norbornane, tricyclodecane, tetracyclododecane, pentacyclopentadecane, adamantane or diamantane.

  The group having an aliphatic ring structure is preferably a group represented by any of the following general formulas (I) to (V), and a group represented by the following general formula (I), (II) or (IV) Are more preferable, and a group represented by the following general formula (I) is more preferable.

In the general formula, L ¹ and L ² each independently represent a single bond or a divalent or higher valent linking group, and a divalent or higher valent linking group is preferred. L ¹ and L ² may be the same or different, and are preferably the same.
n1 is an integer of 1 to 3, preferably 1 or 2, and more preferably 1.
* Each represents a bond with a (meth) acryloyloxy group. m1 is the number of (valence of the linking group minus 1), respectively.

In the general formula, L ³ and L ⁴ each independently represent a single bond or a divalent or higher linking group, and preferably a divalent or higher valent linking group. L ³ and L ⁴ may be the same or different and are preferably the same.
n2 is 1 or 2, and 1 is preferable.
* Each represents a bond with a (meth) acryloyloxy group. Each m2 is the number of (valence of the linking group minus 1).

In the general formula, L ⁵ and L ⁶ each independently represent a single bond or a divalent or higher linking group, and a linking group, particularly an alkylene group is preferred. L ⁵ and L ⁶ may be the same or different and are preferably the same.
n3 is 1 or 2, and 1 is preferable.
* Each represents a bond with a (meth) acryloyloxy group. m3 is the number of (valence of the linking group minus 1), respectively.

In the general formula, L ⁷ and L ⁸ each independently represent a single bond or a divalent or higher valent linking group. L ⁹ represents a hydrogen atom, a single bond or a divalent or higher linking group. L ⁷ and L ⁸ are preferably a single bond, and L ⁹ is preferably a hydrogen atom or a single bond. L ⁷ and L ⁸ may be the same or different and are preferably the same. L ⁹ may be the same as or different from L ⁷ or L ⁸ .
* Each represents a bond with a (meth) acryloyloxy group. m4 is the number of (valence of the linking group minus 1), respectively.

In the general formula, L ¹⁰ and L ¹¹ each independently represent a single bond or a divalent or higher valent linking group, and a single bond is preferred. L ¹⁰ and L ¹¹ may be the same or different and are preferably the same.
* Each represents a bond with a (meth) acryloyloxy group. m5 is the number of (valence of the linking group minus 1), respectively.

The divalent or higher linking group that can be taken as L ^{1 to} L ¹¹ is not particularly limited, but is preferably a 2 to 5 valent linking group, more preferably a 2 to 3 valent linking group, and a divalent linking group. Further preferred.
Examples of such a linking group include a group obtained by removing a hydrogen atom of (the valence of the linking group minus 1) from a group selected from the substituent group T, and an amide optionally substituted with an N atom. Examples thereof include a bond, a urethane bond optionally substituted with an N atom, an ester bond, an oxycarbonyl group, an ether bond, or a group formed by linking two or more of these. Although the number of groups to connect is not specifically limited, 2-5 pieces are preferable and 2-3 pieces are more preferable.
The divalent linking group is preferably an alkylene group having 1 to 6 carbon atoms which may be substituted, or a polyoxyalkylene group (an alkylene group having 1 to 6 carbon atoms which may be substituted and an ether bond). Are preferable, an alkylene group having 1 to 6 carbon atoms which may be substituted is more preferable, an alkylene group having 1 to 3 carbon atoms which may be substituted is further preferable, and carbon An unsubstituted alkylene group of 1 to 3 is particularly preferable. Examples of the substituent that may substitute the alkylene group include groups selected from the substituent group T.

Examples of the (meth) acrylate compound include compounds in which the (meth) acryloyloxy group is bonded to L ^{1 to} L ¹¹ in the above formulas.

Such a (meth) acrylate compound is, for example, a polyol such as a diol or triol containing a group having the above aliphatic ring structure, and a carboxylic acid, a carboxylic acid derivative, an epoxy derivative or a compound having a (meth) acryloyl group. It can be synthesized by a one-step or two-step reaction with an isocyanate derivative or the like.
Preferably, a compound such as (meth) acrylic acid, (meth) acryloyl chloride, (meth) acrylic anhydride or glycidyl (meth) acrylate, a compound described in International Publication No. 2012 / 00316A1 (for example, 1, 1-bis (acryloxymethyl) ethyl isocyanate) can be synthesized by reacting with a polyol containing a group having the above aliphatic ring structure.

  Although the preferable example of a (meth) acrylate compound is shown in the following and an Example, this invention is not limited to these.

The (meth) acrylate compound preferably has a ClogP value of 3.0 to 7.0, and more preferably 3.5 to 6. When the ClogP value of the (meth) acrylate compound is in the above range, the compatibility with the cyclic polyolefin increases, and the haze of the resulting laminate can be reduced.
The ClogP value is a value obtained by calculating the common logarithm logP of the distribution coefficient P between 1-octanol and water. As a method and software used for calculating the ClogP value, known methods and software can be used. In the present invention, the ClogP value of the (meth) acrylate compound is determined by the CLOGP program incorporated in the system of Cambridge Soft: ChemBioDrawULtra, The calculated value.

  The (meth) acrylate compound may have a substituent.

The composition for forming a moisture-proof layer contains at least one (meth) acrylate compound.
The content of the (meth) acrylate compound in the moisture-proof layer forming composition is not particularly limited, but in terms of improvement in interlayer adhesion and reduction of haze, the total mass of the cyclic polyolefin and the acrylate or methacrylate compound. 5-60 mass% is preferable, 10-55 mass% is more preferable, and the range of 15-50 mass% is still more preferable.
The ratio of the content of the cyclic polyolefin and the content of the (meth) acrylate compound in the moisture-proof layer forming composition is the content of the cyclic polyolefin: the content of the (meth) acrylate compound, 40:60 to 95: 5. Is preferable, and 50: 50-90: 10 mass% is more preferable.

  In this invention, in addition to the said (meth) acrylate compound, the trifunctional or more than trifunctional (meth) acrylate compound used for the hard-coat layer mentioned later or a bifunctional (meth) acrylate compound can be used. The amount of the bifunctional or trifunctional or higher (meth) acrylate compound is appropriately determined within a range not impairing the effects of the present invention.

− Initiator −
The moisture-proof layer forming composition includes at least one polymerization initiator. As the polymerization initiator, a thermal radical polymerization initiator can be used, but a photo radical polymerization initiator is preferable.
As photo radical polymerization initiators, acetophenone initiator, benzoin initiator, benzophenone initiator, phosphine oxide initiator, oxime initiator, ketal initiator, anthraquinone initiator, thioxanthone initiator, azo compound initiator, peroxide initiator Agents, disulfide compound initiators, lophine dimer initiators, onium salt initiators, borate salt initiators, active ester initiators, active halogen initiators, inorganic complex initiators or coumarin initiators. Specific examples, preferred embodiments, commercially available products, and the like of the photopolymerization initiator are described in paragraphs [0133] to [0151] of JP-A-2009-098658, and these are also suitably used in the present invention. be able to.

  Examples of the photo radical polymerization initiator include “Latest UV Curing Technology”, Technical Information Association, 1991, p. 159, and “UV curing system”, Kiyomi Kato, 1989, General Technology Center, p. Various examples are also described in 65 to 148, and these can be suitably used in the present invention.

  Commercially available photocleavable photoradical polymerization initiators include “Irgacure 651”, “Irgacure 184”, “Irgacure 819”, “Irgacure 907”, “Irgacure 1870” (CGI-403 / Irgacure 184) manufactured by BASF. = 7/3 mixing initiator), "Irgacure 500", "Irgacure 369", "Irgacure 1173", "Irgacure 2959", "Irgacure 4265", "Irgacure 4263", "Irgacure 127" or "OXE01", etc. “Kaya Cure DETX-S”, “Kaya Cure BP-100”, “Kaya Cure BDK”, “Kaya Cure CTX”, “Kaya Cure BMS”, “Kaya Cure 2-EAQ”, “Kaya Cure ABQ”, “Nippon Kayaku Co., Ltd.” Kayacure CP “X”, “Kayacure EPD”, “Kayacure ITX”, “Kayacure QTX”, “Kayacure BTC”, “Kayacure MCA”, etc., and “Esacure (KIP100F, KB1, EB3, BP, X33, KTO46) manufactured by Sartomer. , KT37, KIP150 or TZT) ". A combination of these is also a preferred example.

  The content of the initiator in the moisture-proof layer forming composition is set so that the polymerizable compound contained in the composition is polymerized and the starting point is not excessively increased, so that the total solid content in the composition is increased. On the other hand, 0.5-8 mass% is preferable and 1-7 mass% is more preferable.

− Additive −
The moisture-proof layer forming composition may contain an additive as long as the effects of the present invention are not impaired. As an additive, what is normally used for an optical film can be used, without being specifically limited. Specifically, an epoxy monomer, a photoacid generator (cationic polymerization initiator), an ultraviolet absorber, a surfactant, a weather resistance improver, a hardness improver, an antiglare imparting agent, a slipperiness imparting agent, a matting agent, etc. Is mentioned.

− Solvent −
The composition for forming a moisture-proof layer can contain a solvent. As the solvent, various solvents can be used in consideration of the solubility of the cyclic polyolefin and the (meth) acrylate compound, the drying property at the time of coating, or the like.
As the solvent, an organic solvent is preferable, and examples thereof include the following solvents.
Dibutyl ether, dimethoxyethane, diethoxyethane, propylene oxide, 1,4-dioxane, 1,3-dioxolane, 1,3,5-trioxane, tetrahydrofuran, anisole, phenetole, dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, acetone , Methyl ethyl ketone (MEK), diethyl ketone, dipropyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, methyl cyclohexanone, ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate Γ-ptyrolactone, methyl 2-methoxyacetate, methyl 2-ethoxyacetate, ethyl 2-ethoxyacetate, ethyl 2-ethoxypropionate, 2-methoxyethanol, 2-propoxy Ethanol, 2-butoxyethanol, 1,2-diacetoxyacetone, acetylacetone, diacetone alcohol, methyl acetoacetate, ethyl acetoacetate, etc. methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butyl alcohol, cyclohexyl alcohol, isobutyl acetate, methyl Isobutyl ketone (MIBK), 2-octanone, 2-pentanone, 2-hexanone, ethylene glycol ethyl ether, ethylene glycol isopropyl ether, ethylene glycol butyl ether, propylene glycol methyl ether, ethyl carbitol, butyl carbitol, hexane, heptane, octane , Cyclohexane, methylcyclohexane, ethylcyclohexane, benzene, toluene, xylene, etc. .
A solvent can be used individually by 1 type or in combination of 2 or more types.

  Among the above solvents, it is preferable to use at least one selected from the group consisting of dimethyl carbonate, methyl acetate, ethyl acetate, methyl ethyl ketone, methyl isobutyl ketone, acetylacetone and acetone, and methyl acetate, methyl ethyl ketone or methyl isobutyl ketone is used. It is more preferable.

  The content of the solvent in the moisture-proof layer forming composition is not particularly limited, but is preferably such that the solid content concentration of the moisture-proof layer forming composition is in the range of 5 to 80% by mass, and 10 to 75% by mass. The amount in the range is more preferable, and the amount in the range of 10 to 70% by mass is still more preferable.

  The composition for forming a moisture-proof layer can be prepared by mixing the above-described components by a usual method. The mixing conditions are not particularly limited, but are usually set so that polymerization does not start with an initiator.

<HC layer forming composition and preparation thereof>
The composition for HC layer formation contains a trifunctional or higher functional acrylate or methacrylate compound, an initiator, and, if necessary, a solvent and various additives.

-Trifunctional or higher acrylate or methacrylate compounds-
The tri- or higher functional (meth) acrylate compound has at least three (meth) acryloyloxy groups and a group to which these (meth) acryloyloxy groups are bonded.
The number of (meth) acryloyloxy groups contained in the tri- or higher functional (meth) acrylate compound is not particularly limited as long as it is 3 or more, preferably 3 to 8, and preferably 3 to 6. preferable.
It does not specifically limit as group which a (meth) acryloyloxy group couple | bonds, Each group mentioned above is mentioned. In the present invention, the tri- or higher functional (meth) acrylate compound is preferably a (meth) acrylate compound having no cycloaliphatic group, an ester compound of polyhydric alcohol and (meth) acrylic acid, epoxy A (meth) acrylate compound, a urethane (meth) acrylate compound, a polyester (meth) acrylate compound, etc. can be mentioned.

The polyhydric alcohol is not particularly limited as long as it is a trihydric or higher alcohol, but an acyclic aliphatic polyhydric alcohol is preferable. For example, aliphatic polyhydric alcohols such as trimethylolethane, trimethylolpropane, pentaerythritol, ditrimethylolpropane, dipentaerythritol; these aliphatic polyhydric alcohols and polybasic acids (for example, succinic acid, phthalic acid, hexahydrophthalic anhydride Polyester polyol obtained by reaction with acid, terephthalic acid, adipic acid, azelaic acid, tetrahydrophthalic anhydride, etc .; polycaprolactone polyol obtained by reaction of the above aliphatic polyhydric alcohol and ε-caprolactone; polycarbonate polyol (for example, And polycarbonate polyols obtained by reaction of aliphatic polyhydric alcohols with diphenyl carbonate); and polyether polyols.
Among these, aliphatic polyhydric alcohols, polyester polyols, and polycaprolactone polyols are preferable, aliphatic polyhydric alcohols and polyester polyols are more preferable, and aliphatic polyhydric alcohols are particularly preferable.

  Among the above-mentioned trifunctional or higher functional (meth) acrylate compounds, ester compounds of polyhydric alcohols and (meth) acrylic acid are preferable. Examples of the ester compound include pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethylene oxide (EO) modified trimethylolpropane tri (meth) acrylate, propylene oxide ( PO) modified trimethylolpropane tri (meth) acrylate, EO modified phosphoric acid tri (meth) acrylate, trimethylolethane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, di Examples include pentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate.

  Examples of the urethane (meth) acrylate compound include polyurethane polyacrylate. Examples of the polyester (meth) acrylate compound include polyester polyacrylate, caprolactone-modified tris (acryloxyethyl) isocyanurate, and the like.

As the trifunctional or higher functional (meth) acrylate compound, a commercially available product can be used. For example, NK ester A-TMMT (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.), KAYARAD DPHA (trade name, Nippon Kayaku) For example).
As for the trifunctional or higher functional (meth) acrylate compounds, those described as “non-fluorinated polyfunctional monomers” in paragraphs [0114] to [0122] of JP-A-2009-98658 are used in the present invention. Can also be used.

In the present invention, a bifunctional (meth) acrylate compound can be used in addition to a trifunctional or higher functional (meth) acrylate compound. The bifunctional (meth) acrylate compound is not particularly limited as long as it is a compound having two (meth) acryloyloxy groups.
Examples of the bifunctional (meth) acrylate compound include the bifunctional (meth) acrylate compound described in the (meth) acrylate compound that forms the moisture-proof layer, particularly the (meth) acrylate compound having the above cyclic aliphatic group. It is done. Other than these, (meth) acrylic acid diester compound of alkylene glycol, (meth) acrylic acid diester compound of polyoxyalkylene glycol, (meth) acrylic acid diester compound of polyhydric alcohol, EO or PO adduct (meth) Examples include acrylic acid diester compounds, and more specifically 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol (meth) acrylate, ethylene glycol di ( Examples include meth) acrylate and triethylene glycol di (meth) acrylate.
The amount of use in the case of using a bifunctional (meth) acrylate compound will be described later.

Ratio of the number of reactive groups to the molecular weight of the (meth) acrylate compound: The number of reactive groups / molecular weight is preferably 0.0070 to 0.0095 as an average value, and more preferably 0.0075 to 0.0095. . When the average value of the above ratios is within the above range, the peelability from the peelable support is excellent in the production method of the present invention described later.
Here, the reactive group of the (meth) acrylate compound means the number of (meth) acryloyl groups in one molecule. The average value of the number of reactive groups / molecular weight means the number of reactive groups / molecular weight of the (meth) acrylate compound when the HC layer forming composition contains one kind of trifunctional or higher (meth) acrylate compound. . On the other hand, when the composition for forming the HC layer contains a plurality of trifunctional or higher functional (meth) acrylate compounds or bifunctional (meth) acrylate compounds, the trifunctional or higher functional (meth) acrylate compound and the bifunctional The sum of the product of the number of reactive groups / molecular weight and the content ratio (mass fraction) calculated for each (meth) acrylate compound.

  The trifunctional or higher functional (meth) acrylate compound and the bifunctional (meth) acrylate compound may each have a substituent.

The content of the trifunctional or higher functional (meth) acrylate compound in the HC layer forming composition is not particularly limited, but is preferably 5% by mass or more and less than 100% by mass, more preferably 10% by mass or more and less than 100% by mass, A range of 15% by mass or more and less than 100% by mass is more preferable.
When the bifunctional (meth) acrylate compound is contained, the total content with the trifunctional or higher (meth) acrylate compound may be in the above range. For example, the ratio of the content of the trifunctional or higher (meth) acrylate compound and the content of the bifunctional (meth) acrylate compound is the content of the trifunctional or higher (meth) acrylate compound: bifunctional (meth) The content of the acrylate compound is preferably 5:95 to 100: 0, and more preferably 15:85 to 100: 0% by mass.

− Initiator −
The composition for HC layer formation contains at least one polymerization initiator.
As the polymerization initiator, a thermal radical polymerization initiator can be used, but a photo radical polymerization initiator is preferable. The radical photopolymerization initiator is synonymous with the radical photopolymerization initiator in the moisture-proof layer forming composition, and preferred ones are also the same.
The content of the initiator in the composition for forming the HC layer is also synonymous with the content of the initiator in the composition for forming the moisture-proof layer, and preferable ones are also the same.

− Additive −
The hard coat layer may contain the above-described additives as long as the effects of the present invention are not impaired.

− Solvent −
The composition for HC layer formation can contain a solvent.
As a solvent, it is synonymous with the solvent demonstrated by the composition for moisture-proof layer formation, and a preferable thing is also the same.

  The content of the solvent in the composition for forming the HC layer is not particularly limited, but is preferably an amount such that the solid content concentration of the composition for forming the HC layer is in the range of 10 to 80% by mass. The amount in the range is more preferable, and the amount in the range of 20 to 70% by mass is still more preferable.

  The composition for HC layer formation can be prepared by mixing the above-mentioned components by a usual method. The mixing conditions are not particularly limited, but are usually set so that polymerization does not start with an initiator.

<Production of laminated support>
In the production method of the present invention, a laminated support in which a hard coat layer and a moisture-proof layer are arranged in this order on a peelable support is prepared using each composition prepared as described above.
In this laminated support, the HC layer-forming composition is cured on the peelable support to form a hard coat layer, and then the moisture-proof layer-forming composition is cured on the surface of the hard coat layer to form the moisture-proof layer. It can be manufactured by forming.

− Peelable support −
As the peelable support to be used, it can be appropriately selected from those having excellent hard coat layer film-forming properties and peelability from the hard coat layer. Examples of such a releasable support include usually used release films. A film (PET film) made of a polyethylene terephthalate resin is preferred in that the hard coat layer is excellent in film formability and mold release.

  The peelable support preferably has a thickness of 10 to 100 μm, more preferably 10 to 75 μm, and still more preferably 15 to 55 μm. When the film thickness is 5 μm or more, sufficient mechanical strength is easily secured, and curling, wrinkling, buckling, and the like are less likely to occur. Further, when the laminated support is stored in the form of a long roll, for example, when the film thickness is 100 μm or less, it is easy to adjust the surface pressure applied to the laminated support to an appropriate range, and the adhesion in the wound state is reduced. The problem can be avoided.

  As such a peelable support, known materials or films can be used as appropriate. Specific examples of the material include polyester polymers such as the above-described PET, olefin polymers, cycloolefin polymers, (meth) acrylic polymers, cellulose polymers, and polyamide polymers. Moreover, in order to adjust the surface property of a peelable support body, surface treatment can be appropriately performed. For example, corona treatment, room temperature plasma treatment, saponification treatment, silicone treatment, fluorine treatment or olefin treatment can be mentioned, and corona treatment is preferred.

− Formation of hard coat layer −
The composition for forming an HC layer is applied on the surface of the peelable support (preferably the surface not subjected to surface treatment) and cured.
The method for applying the HC layer forming composition is not particularly limited, and a normal application method can be employed. Examples thereof include a dip coating method, an air knife coating method, a curtain coating method, a roller coating method, a wire bar coating method, a gravure coating method, an extrusion coating method (die coating method), and a micro gravure coating method. Among these, the micro gravure coating method or the die coating method is preferable. Moreover, it does not specifically limit about the conveyance speed at the time of application | coating, 1-100 m / min is preferable. Application conditions such as temperature and humidity are not particularly limited, and are appropriately determined.

  The HC layer forming composition applied to the surface of the peelable support in this manner is dried as necessary. The drying conditions are not particularly limited. For example, the drying temperature can be set to 25 to 140 ° C., and the drying time can be set to 30 to 1000 seconds.

Next, the HC layer forming composition (dried product) on the surface of the peelable support is cured.
If the composition photocuring, so that particularly in the ultraviolet (UV) curing, the illuminance is not particularly limited, but is preferably 10~5000mW / cm ^2, more preferably ^{30~3000mW / cm 2, 50~1000mW / cm} 2 is Further preferred. Moreover, although irradiation amount is not specifically limited, 10-3000 mJ / cm < ² > is preferable and 20-2000 mJ / cm < ² > is more preferable.
UV curing can be performed in air as long as problems such as stickiness on the hard coat layer surface after curing can be avoided, but it is preferably performed in a low oxygen concentration environment. Although it does not specifically limit as oxygen concentration at this time, 10-20000 ppm is preferable, 50-10000 ppm is more preferable, 80-5000 ppm is still more preferable.
Environmental conditions other than the oxygen concentration are not particularly limited, and can be set to an appropriate temperature and humidity.

UV curing can be performed in one step, or can be performed in two or more steps.
Moreover, application | coating and hardening of the composition for HC layer formation may be performed twice or more, and it is preferable in this case that the integrated amount of the illumination intensity in a hardening process is said range.
In this way, by curing (polymerizing) the tri- or higher functional (meth) acrylate compound contained in the HC layer forming composition, the HC layer forming composition is cured and the surface of the peelable support A hard coat layer is formed.

− Formation of moisture barrier layer −
In the production method of the present invention, the moisture-proof layer forming composition is then applied directly to the surface of the hard coat layer on the peelable support and cured.
The method for applying the moisture-proof layer forming composition is not particularly limited, and is the same as the method for applying the HC layer-forming composition, and the application conditions can be set to the same conditions as the HC layer-forming composition.

The moisture-proof layer forming composition applied to the surface of the hard coat layer is dried if necessary. The drying conditions are not particularly limited, and can be set to the same conditions as the HC layer forming composition.
Next, the moisture-proof layer forming composition (dried product) on the surface of the hard coat layer is cured. The method for curing the moisture-proof layer forming composition is the same as the method for curing the HC layer-forming composition, and the curing conditions can be set to the same conditions as the HC layer-forming composition. However, it is preferable to set the temperature at the time of curing the moisture-proof layer forming composition (at the time of UV irradiation) (the ambient temperature or the temperature of the peelable support). As temperature at this time, what is necessary is just room temperature (25 degreeC) or more, However, It is preferable to set to 25-120 degreeC, and it is more preferable to set to 30-120 degreeC. By adjusting the temperature during UV irradiation to the above range, interlayer adhesion between the hard coat layer and the moisture-proof layer can be enhanced.

  In this way, the moisture-proof layer-forming composition is cured by curing (polymerizing) the (meth) acrylate compound contained in the moisture-proof layer-forming composition in the presence of the cyclic polyolefin. Thereby, a moisture-proof layer is formed on the surface of the peelable support via the hard coat layer.

By the above, the laminated support body which has arrange | positioned the hard-coat layer and the moisture-proof layer in this order on the peelable support body can be produced.
The laminated support thus obtained has a moisture-proof layer formed by curing the moisture-proof layer-forming composition directly applied to the surface of the hard coat layer. Therefore, as described above, the moisture-proof layer and the hard coat layer are laminated with strong interlayer adhesion.

− Optical film bonding −
In the production method of the present invention, as described above, an optical film can be bonded to the polarizer before the polarizer and the laminated support are bonded. A method of bonding will be described later.

<Lamination of laminated support and polarizer>
In the production method of the present invention, the moisture-proof layer of the obtained laminated support and the polarizer are then bonded together.
The polarizer can be produced by a usual method, for example, the method described above.
At the time of bonding, the surface of the moisture-proof layer can be hydrophilized. As the hydrophilic treatment, a known treatment can be applied without particular limitation. For example, glow discharge treatment, corona discharge treatment, alkali saponification treatment or the like is preferable, and corona discharge treatment is particularly preferable. It is also preferable to apply the method described in JP-A-6-94915 or JP-A-6-118232.

− Adhesive −
Examples of the adhesive used for the above bonding include an aqueous solution of polyvinyl alcohol, polyvinyl acetal (for example, polyvinyl butyral), latex of a vinyl-based polymer (for example, polybutyl acrylate), UV adhesive (epoxy-based or acrylic UV-curable type). Composition) can be used. Among these, from the viewpoint of suppressing deformation of the laminated body bonded, it is preferable to use a solution-based adhesive, and an aqueous solution of completely saponified polyvinyl alcohol is particularly preferable. Further, from the viewpoint of improving the adhesion between the moisture-proof layer and the polarizer, an ultraviolet curable adhesive can also be preferably used. Although it does not specifically limit as a kind of ultraviolet curable adhesive, The epoxy type ultraviolet curable adhesive described in Unexamined-Japanese-Patent No. 2015-187744, The acrylate type ultraviolet curable adhesive described in Unexamined-Japanese-Patent No. 2015-11094 Or the adhesive agent described in the patent gazette referred in the Example mentioned later is preferable.

− Lamination of laminated support and polarizer −
The laminated support is bonded to the polarizer, preferably on the moisture-proof layer side.
The moisture-proof layer is preferably bonded to the polarizer so that the transmission axis of the polarizer and the slow axis of the moisture-proof layer are parallel, orthogonal, or 45 °. The measurement of the slow axis can be performed by various known methods, for example, using a birefringence meter (KOBRADH, manufactured by Oji Scientific Instruments).
Here, parallel, orthogonal, or 45 ° includes a range of errors allowed in the technical field to which the present invention belongs. For example, it means that it is within the range of ± 10 ° from the strict angle with respect to parallel, orthogonal and 45 °, respectively, and the error from the strict angle is preferably within the range of ± 5 °, and within the range of ± 3 ° Is more preferable.
Parallel to the transmission axis of the polarizer and the slow axis of the moisture-proof layer means that the direction of the main refractive index nx of the moisture-proof layer and the direction of the transmission axis of the polarizer intersect at an angle of ± 10 °. . This angle is preferably within a range of ± 5 °, more preferably within a range of ± 3 °, further preferably within a range of ± 1 °, and most preferably within a range of ± 0.5 °.
Further, the orthogonality of the transmission axis of the polarizer and the slow axis of the moisture-proof layer is an angle in which the direction of the main refractive index nx of the moisture-proof layer and the direction of the transmission axis of the polarizer are within a range of 90 ° ± 10 °. It means that we are in contact. This angle is preferably in the range of 90 ° ± 5 °, more preferably in the range of 90 ° ± 3 °, even more preferably in the range of 90 ° ± 1 °, most preferably 90 ° ± 0.1 °. Within range. If it is the above ranges, the fall of the polarization degree performance under polarizing plate cross Nicol will be suppressed, and light omission is reduced and it is preferable.

− Optical film bonding −
In the production method of the present invention, as described above, the above-described optical film can be bonded to the surface of the polarizer opposite to the surface on which the hard coat layer is bonded.
As an optical film, if it is a well-known film, neither an optical characteristic nor a material will be specifically limited. An optically isotropic film or an optically anisotropic retardation film may be used. As such an optical film, for example, a film containing a cellulose ester resin, an acrylic resin, a cyclic olefin resin, or polyethylene terephthalate is preferable. More specifically, for example, Fujitac TD40UC (manufactured by FUJIFILM Corporation) and the like are included as those containing a cellulose ester resin. Moreover, as what contains an acrylic resin, for example, the optical film containing the (meth) acrylic resin containing the styrene resin described in Japanese Patent No. 4570042, and the glutarimide ring structure described in Japanese Patent No. 5041532 as the main chain An optical film containing a (meth) acrylic resin, an optical film containing a (meth) acrylic resin having a lactone ring structure described in JP2009-122664A, and glutaric acid described in JP2009-139754A Examples include an optical film containing a (meth) acrylic resin having an anhydride unit. Furthermore, as containing a cyclic olefin resin, for example, the cyclic olefin-based resin film described in paragraph [0029] and subsequent paragraphs of JP-A-2009-237376, described in Japanese Patent No. 4881827 or JP-A-08-063536. Examples thereof include a cyclic olefin resin film containing an additive for reducing Rth (thickness direction retardation).
When bonding an optical film to a polarizer, the bonding surface of the optical film can be subjected to the above-described hydrophilic treatment, and the above-described adhesive can be used.

As described above, the moisture-proof layer and the polarizer can be laminated via an adhesive and then heat-treated. The conditions for the heat treatment are not particularly limited, and can be set to the same conditions as the drying conditions for the HC layer forming composition.
In this way, the laminated support and the polarizer can be bonded together via the adhesive layer, and preferably the laminated support, the polarizer and the optical film are bonded together via the adhesive layer in this order. it can.

<Lamination of optical film>
In the above process, when the polarizer and the optical film are not bonded, the polarizer and the optical film can be bonded as described above before or after the following peeling process.

<Peeling of peelable support>
In the production method of the present invention, the peelable support is then peeled from the resulting laminate of the laminated support and the polarizer.
For peeling of the release film, a normal method of peeling the separator (release film) from the polarizing plate in the method for producing a polarizing plate can be employed. The release film may be peeled before the laminate of the laminated support and the polarizer is wound up, or after the laminate of the laminated support and the polarizer is wound up into a roll once. .

As described above, the production method of the present invention is performed, and the laminate of the present invention is produced.
Preferably, when the laminated support is bonded to the polarizer, the polarizer and the optical film are bonded to produce the polarizing plate of the present invention.
In the production method of the present invention, as described above, the application and curing of the HC forming layer composition and the moisture-proof layer forming composition can be performed on the peelable support in one pass (continuously). That is, the hard coat layer and the moisture-proof layer can be formed in this order in one pass on the peelable support. The production method of the present invention can produce a laminate or a polarizing plate exhibiting the above-described excellent characteristics at high productivity and at low cost.
In addition, when the average value of the number of reactive groups / molecular weight of the tri- or higher functional (meth) acrylate compound contained in the composition for forming an HC layer is within the above range, the peelability between the peelable support and the hard coat layer. Excellent (peeling force is small) and can prevent poor peeling.

[Image display device]
The polarizing plate of the present invention is preferably used for an image display device. Examples of such an image display device include a liquid crystal display device and an organic electroluminescence display device. When used for an organic electroluminescence display device, for example, it is used for antireflection applications. Especially, the polarizing plate of this invention is used suitably for a liquid crystal display device.
<Liquid crystal display device>
The liquid crystal display device which is one embodiment as the image display device of the present invention includes a liquid crystal cell and the polarizing plate of the present invention disposed in at least one of the liquid crystal cells.

A liquid crystal display device, which is an embodiment of the image display device of the present invention, includes a liquid crystal cell in which liquid crystal is supported between two electrode substrates, two polarizing plates disposed on both sides thereof, and Accordingly, at least one optical compensation film is provided between the liquid crystal cell and the polarizing plate.
A preferred embodiment of the liquid crystal display device will be described.

FIG. 3 is a schematic view showing an embodiment of the liquid crystal display device. In FIG. 3, the liquid crystal display device 20 includes a liquid crystal layer 24 and a first (upper liquid crystal cell) electrode substrate 23 and a second (lower liquid crystal cell) electrode substrate 25 disposed on both surface sides (referred to as upper and lower sides in FIG. 3). A first (upper) polarizing plate 21 and a second (lower) polarizing plate 26 disposed on both sides of the liquid crystal cell. A color filter may be disposed between the liquid crystal cell and each polarizing plate. When the liquid crystal display device 20 is used as a transmission type, a cold cathode or hot cathode fluorescent tube, or a backlight having a light emitting diode, field emission element, or electroluminescent element as a light source is disposed on the back surface. The substrate of the liquid crystal cell generally has a thickness of 50 μm to 2 mm.
Although not shown, the first polarizing plate 21 and the second polarizing plate 26 usually have a structure in which a polarizer is sandwiched between two optical films or the like. In the liquid crystal display device 20 of the present invention, it is preferable that at least one polarizing plate is the polarizing plate of the present invention. Of the two polarizing plates, the polarizing plate of the present invention is disposed as the first polarizing plate 21 (viewing-side polarizing plate), and further the second polarizing plate 26 (backlight-side polarizing plate) of the present invention. It is also preferable to dispose a polarizing plate. The polarizing plate of the present invention as the first polarizing plate 21 is preferably disposed so that the hard coat layer side is the surface (viewing side). When the polarizing plate of the present invention is used as the second polarizing plate 26, the arrangement of the polarizing plate is not particularly limited. Thereby, expansion / contraction of the polarizer contained in two polarizing plates can be suppressed, and the curvature of a panel can be prevented.

  The liquid crystal layer 24 of the liquid crystal cell is usually formed by sealing liquid crystal in a space formed by sandwiching a spacer between two substrates. The transparent electrode layer is formed on the substrate as a transparent film containing a conductive substance. Thereby, it becomes an electrode substrate provided with the substrate and the transparent electrode layer. The liquid crystal cell may further be provided with a gas barrier layer, a hard coat layer, or an undercoat layer (undercoat layer) (used for adhesion of the transparent electrode layer). These layers are usually provided on the substrate.

(Types of liquid crystal display devices)
The cellulose ester film of the present invention can be used for liquid crystal cells in various display modes. TN (Twisted Nematic), IPS (In-Plane Switching), FLC (Ferroelectric Liquid Crystal), AFLC (Anti-Ferroelectric Liquid Crystal), OCB (Optically QuantBandS). Various display modes such as (Electrically Controlled Birefringence) and HAN (Hybrid Aligned Nematic) have been proposed. In addition, a display mode in which the above display mode is oriented and divided has been proposed. The cellulose ester of the present invention can be suitably used for a liquid crystal display device in any display mode. Further, it can be suitably used for any liquid crystal display device of a transmissive type, a reflective type, and a transflective type.

  The present invention will be described in more detail based on examples, but the present invention is not limited to the following examples.

[Example 1: Production of polarizing plates P-1 to P-20 and CP-1 to CP-6]
In this example, the polarizing plate 15 shown in FIG. 2 was manufactured as follows, and the characteristics were evaluated.

The (meth) acrylate compound used in this example is shown below.

<Manufacture of polarizing plate P-1>
(Preparation of HC layer forming composition)
Each component was mixed with the composition shown below, and it filtered with the polypropylene filter with the hole diameter of 30 micrometers, and prepared the composition for HC layer formation.

――――――――――――――――――――――――――――――――――
Composition of HC layer forming composition ――――――――――――――――――――――――――――――――――
Trifunctional or higher (meth) acrylate compound:
AD-TMP (manufactured by Shin-Nakamura Chemical Co., Ltd.) 94.0 parts by mass Initiator: Irgacure 127 (manufactured by BASF) 6.0 parts by mass Surfactant A 0.02 parts by mass Methyl isobutyl ketone 180.3 parts by mass— ――――――――――――――――――――――――――――――――

The surfactant A is a compound shown below (the ratio of repeating units is a molar ratio).

(Preparation of moisture-proof layer forming composition)
Each component was mixed by the composition shown below, and it filtered with the polypropylene filter with the hole diameter of 30 micrometers, and prepared the composition for moisture-proof layer formation.

―――――――――――――――――――――――――――――――――――――
Composition of moisture barrier composition ―――――――――――――――――――――――――――――――――――――
Cyclic polyolefin: APL6011T (made by Mitsui Chemicals) 60.0 parts by mass (Meth) acrylate compound: DCP (made by Shin-Nakamura Chemical Co., Ltd.) 40.0 parts by mass Initiator: Irgacure 184 (made by BASF) 6.0 parts by mass Methylcyclohexane 511.7 parts by mass ―――――――――――――――――――――――――――――――――――――

The APL6011T contains a cyclic polyolefin (mass average molecular weight: 108200) which is a copolymer of ethylene and a norbornene compound.

(Formation of hard coat layer)
As the peelable support, a polyethylene terephthalate film (trade name: Lumirror S105, film thickness 38 μm, manufactured by Toray Industries, Inc.) was used. The prepared composition for forming an HC layer was applied to the surface of the peelable support that had not been surface-treated by a microgravure coating method at a conveyance speed of 30 m / min, and dried at 100 ° C. for 60 seconds. Thereafter, the inside of the exposure machine was purged with nitrogen gas, the oxygen concentration was adjusted to about 100 ppm, and the temperature of the peelable support was set to 25 ° C. Next, the dried composition for HC layer formation was irradiated with ultraviolet rays having an illuminance of 400 mW / cm ² and an irradiation amount of 60 mJ / cm ² using a 160 W / cm air-cooled metal halide lamp (manufactured by Eye Graphics). The HC layer forming composition was cured. Thus, a hard coat layer having a thickness of 5 μm was formed on the peelable support.
The oxygen concentration was measured with an oxygen concentration meter OX-102 (manufactured by Yokogawa Electric Corporation).

(Formation of moisture barrier)
The moisture-proof layer-forming composition was applied to the surface of the hard coat layer formed on the peelable support by a microgravure coating method at a conveyance speed of 30 m / min and dried at 100 ° C. for 60 seconds. Thereafter, the inside of the exposure machine was purged with nitrogen gas to adjust the oxygen concentration to about 100 ppm, and the temperature of the peelable support was heated to 120 ° C. Maintaining this state, the dried composition for forming a moisture-proof layer was irradiated with ultraviolet rays having an illuminance of 400 mW / cm ² and an irradiation amount of 30 mJ / cm ² using a 160 W / cm air-cooled metal halide lamp (made by Eye Graphics). Irradiation was performed to cure the moisture-proof layer forming composition. Thus, a moisture-proof layer having a thickness of 10 μm was formed on the surface of the hard coat layer to obtain a laminated support RS-1. The oxygen concentration was measured with the above oxygen concentration meter.
The surface of the formed moisture-proof layer was subjected to corona treatment.

(Preparation of protective film)
Both sides of a cyclic polyolefin film (Zeonor ZB12: trade name, manufactured by Nippon Zeon Co., Ltd.) as a protective film were subjected to corona treatment.

(Production of polarizer)
According to Example 1 described in Japanese Patent Application Laid-Open No. 2001-141926, a circumferential speed difference was given between two pairs of nip rolls and the film was stretched in the longitudinal direction to produce a polarizer having a thickness of 12 μm.

(Bonding)
Laminated support RS-1 in which the moisture-proof layer was corona-treated, the prepared polarizer, and the corona-treated cyclic polyolefin film were laminated in this order by roll-to-roll through the following adhesive. At this time, the moisture-proof layer of the laminated support RS-1 is arranged on the polarizer side, and the laminated support RS-1 and the cyclic polyolefin film and the polarizer are in the longitudinal direction of the laminated support RS-1 and the cyclic polyolefin film. It arrange | positioned so that the absorption axis of a polarizer might become parallel. Next, this laminate was dried at 70 ° C. to obtain a polarizing plate with a peelable support.
As an adhesive, an adhesive (modified PVA paste) was prepared according to Production Example 2 described in JP2012-177890A.

(Peeling of peelable support)
The peelable support was continuously peeled from the obtained polarizing plate with peelable support using the same device as the separator peeling device. Thus, a laminate P-1 having a moisture-proof layer and a hard coat layer on one surface of the polarizer and a cyclic polyolefin film on the other surface of the polarizer was produced.

<Manufacture of polarizing plates P-2 to P-9 and P-12 to P-20>
In the production of the polarizing plate P-1, the composition of the HC layer forming composition, the composition of the moisture proof layer forming composition, the film thickness of the hard coat layer or the film thickness of the moisture proof layer was changed as shown in Table 1. Other than that, polarizing plates P-2 to P-9 and P-12 to P-20 were produced in the same manner as polarizing plate P-1.
APL6013T and APL8008T used for the production of polarizing plates P-2, P-3, and P-19 are both cyclic polyolefins (a mass average molecular weight of APL6013T: 113100, APL8008T, which are copolymers of ethylene and norbornene compounds). (Mass average molecular weight: 122800).

<Manufacture of polarizing plates P-10 and P-11>
In the production of the polarizing plate P-1, the peelable support was made of a polyethylene terephthalate film (trade name: Lumirror S-10, film thickness 80 μm, manufactured by Toray Industries, Inc.) or a nylon film (trade name: ON-25, film thickness 25 μm, Polarizing plates P-10 and P-11 were produced in the same manner as polarizing plate P-1, except that they were changed to Unitika Ltd.).

<Manufacture of polarizing plates CP-1 and CP-2>
In the production of the polarizing plate P-1, polarizing plates CP-1 and CP-2 are produced in the same manner as the polarizing plate P-1, except that the moisture-proof layer is not provided or the hard coat layer is not provided. did.
When the moisture-proof layer or the hard coat layer was not provided, “-” was entered in the moisture-proof layer column and the hard coat layer column in Table 1.

<Manufacture of polarizing plates CP-3, CP-4 and CP-6>
In the production of the polarizing plate P-1, a bifunctional (meth) acrylate compound: ADCP (the number of reactive groups / molecular weight is 0.0066) is used instead of the trifunctional or higher functional (meth) acrylate compound of the HC layer forming composition. A polarizing plate CP-3 was produced in the same manner as the polarizing plate P-1, except that it was.
In the production of the polarizing plate P-1, except that the composition of the composition for forming the HC layer or the composition for forming the moisture-proof layer was changed as shown in Table 1, as in the polarizing plate P-1, Polarizing plates CP-4 and CP-6 were produced.
The concentration of the cyclic polyolefin or the (meth) acrylate compound in the moisture-proof layer forming composition for forming the moisture-proof layer of the polarizing plate CP-4 or CP-6 is to form the moisture-proof layer of the polarizing plate P-1. The total concentration of the cyclic polyolefin and the (meth) acrylate compound in the moisture-proof layer-forming composition was the same. Moreover, the initiator is not used for the composition for moisture-proof layer formation for forming the moisture-proof layer of polarizing plate CP-4 and CP-6.
In Table 1, “-” was entered in the corresponding column for components not used.

<Manufacture of polarizing plate CP-5>
An attempt was made to produce a polarizing plate CP-5 having a moisture-proof layer containing cyclic polyolefin (APL6011T) and poly (meth) acrylate (trade name: DCP, Shin-Nakamura Chemical Co., Ltd.). However, the compatibility between the cyclic polyolefin and the poly (meth) acrylate is poor, and the composition for forming the moisture-proof layer cannot be prepared. Therefore, the polarizing plate CP-5 cannot be produced.

The average number of reactive groups / molecular weight of the (meth) acrylate compound used in the HC layer forming composition was calculated and listed in Table 1.
Moreover, the glass transition temperature Tg of the cyclic polyolefin used for the moisture-proof layer forming composition and the ClogP value of the (meth) acrylate compound were measured or calculated by the above-described methods, and the results are shown in Table 1.

[Evaluation of polarizing plate, etc.]
The manufactured polarizing plate was evaluated for the following performance, and the results are shown in Table 1.
<Test Example 1: Interlayer adhesion test>
Interlayer adhesion between the hard coat layer and the moisture-proof layer was evaluated by a cross cut test (cross-cut method) according to JIS K 5400. The specific procedure is shown below.
In each of the produced polarizing plates, 11 cuts with a 1 mm interval were made on the surface of the hard coat layer using a cutter knife and a cutter guide to produce 100 grids. The cellophane tape (registered trademark) was pressure-bonded on the grid and then peeled off, and the cellophane tape (registered trademark) was replaced with a new one each time for a total of three times. Thereafter, the state of the grids was observed, and the number of grids peeled from the moisture-proof layer was counted. The number of peeled grids was evaluated according to the following evaluation criteria.
A: No. of grids peeled 0 B: 1-5 grids peeled C: 6-30 grids peeled D: 31 or more grids peeled in this test C and above are acceptable levels.
Since the polarizing plates CP-1 and CP-2 are not provided with a moisture-proof layer or a hard coat layer, interlayer adhesion is not evaluated ("-" is entered in the corresponding column of Table 1).

<Test Example 2: Polarizer durability test>
For the polarizer durability, the degree of polarization was measured in the following manner in a form in which a polarizing plate was attached to glass via an adhesive.
A sample (approx. 5 cm) on which a polarizing plate is attached on a glass plate so that the hard coat layer (moisture-proof layer in polarizing plate CP-2) is on the air interface side (on the side away from the glass plate). × 5 cm) were produced. About these samples, the glass plate side was set toward the light source, and the degree of polarization was measured. Each of the two samples was measured and the arithmetic average value was taken as the polarization degree of the polarizing plate.
The degree of polarization was calculated by the following formula.

Polarization degree (%) = [(parallel transmittance−orthogonal transmittance) / (orthogonal transmittance + parallel transmittance)] ^1/2 × 100

The degree of polarization was measured in the range of 380 to 780 nm using an automatic polarizing film measuring device VAP-7070 manufactured by JASCO Corporation, and the measured value at a wavelength of 410 nm at which the degree of deterioration is more noticeable than other wavelengths was adopted.
Thereafter, the sample was stored for 500 hours in an environment of a temperature of 85 ° C. and a relative humidity of 85%. Subsequently, the polarization degree was measured about two samples like the above, and the measured value of two samples was arithmetically averaged, and it was set as the polarization degree of the polarizing plate after a preservation | save.
Polarizer durability was evaluated based on the following evaluation criteria for the amount of change in polarization degree before and after storage.
Here, the amount of change in polarization degree is calculated by the following equation.

  Polarization degree change (%) = [Polarization degree before storage (%) − Polarization degree after storage (%)]

A: Polarization degree change amount is less than 0.02% B: Polarization degree change amount is 0.02% or more and less than 0.05% C: Polarization degree change amount is 0.05% or more and less than 1% D: Polarization degree change amount 1% or higher In this test, rank C or higher is a pass level.

<Test Example 3: Scratch resistance test>
The scratch resistance test was evaluated by a rubbing test on the surface of the hard coat layer using a rubbing tester under the following conditions.
Specifically, after rubbing the surface of the hard coat layer 10 times with a rubbing material under the following rubbing test conditions, oil-based black ink (complementary magic ink, Teranishi Chemical Industries, Ltd.) is applied to the cyclic polyolefin film on the back side of the hard coat layer. The scratches on the rubbing part were visually observed with reflected light and evaluated according to the following criteria. The above test was repeated three times, and the following three stages were evaluated based on the arithmetic average value of the number of scratches that could be confirmed.
− Rubbing test conditions −
Environmental conditions: Temperature 25 ° C, relative humidity 60%
Rubbing material: Steel wool (grade (count) No. 0000, manufactured by Nippon Steel Wool Co., Ltd.) is wound around the rubbing tip (1 cm x 1 cm) of a tester that comes into contact with the hard coat layer surface, and fixed by a band Distance (one way): 13cm
Rubbing speed: 13 cm / sec Load: 500 g / cm ²
Tip contact area: 1 cm x 1 cm (contact surface is flat)
Number of rubbing: 10 reciprocations-Evaluation criteria for scratch resistance test-
On the surface of the hard coat layer,
A: Scratches cannot be confirmed.
B: 5 or less scratches can be confirmed.
C: Six or more scratches can be confirmed.
In this test, rank B or higher is an acceptable level.

<Test Example 4: Haze test>
Using a haze meter (NDH2000, manufactured by Nippon Denshoku Industries Co., Ltd.), each polarizing plate was cut into 40 mm × 80 mm in accordance with JIS K 7136, and this was removed in an environment of a temperature of 25 ° C. and a relative humidity of 60%. The haze value was measured. About all the measured haze values, the haze of the polarizing plate was evaluated based on the following evaluation criteria.
A: Total haze value is less than 0.5% B: Total haze value is 0.5% or more and less than 3% In the present invention, the haze test is a reference test, and rank B or higher is a pass level of the test.

<Test Example 5: Residual solvent test>
The residual solvent test of the polarizing plate was evaluated based on the amount of solvent remaining in the hard coat layer and the moisture-proof layer. That is, a two-layer laminate in which the peelable support was peeled from each laminate support produced in the same manner as in the production of the polarizing plate was used. From this two-layer laminate, a sample A in which 300 mg of a test piece containing equal amounts of a hard coat layer and a moisture-proof layer was dissolved in 30 mL of methyl acetate and a sample B in which 30 mL of dichloromethane was dissolved were prepared. Samples A and B were each measured by gas chromatography (GC) under the following conditions.
− GC measurement conditions −
Column: DB-WAX (0.25 mmφ × 30 m, film thickness 0.25 μm)
Column temperature: 50 ° C
Carrier gas: Nitrogen gas Analysis time: 15 minutes Sample injection volume: 1 μL

In the GC measurement of sample A, the content of each peak other than methyl acetate was determined using a calibration curve, and the total mass was defined as Sa (mg). On the other hand, in the GC measurement of sample B, the content of each peak in the region hidden behind the methyl acetate peak in the GC measurement of sample A was determined using a calibration curve, and the total mass was defined as Sb (mg). The sum of the total mass Sa in sample A and the total mass Sb in sample B was defined as the mass (mg) of the solvent remaining in the test piece.
The residual solvent amount of the two-layer laminate was calculated from the following formula and evaluated based on the following evaluation criteria.
Residual solvent amount (% by mass) = [(Sa + Sb) / 300] × 100
A: Residual solvent amount is less than 0.2% by mass B: Residual solvent amount is from 0.2% by mass to less than 0.5% by mass C: Residual solvent amount is from 0.5% by mass to less than 1% by mass D: Residual solvent The amount is 1% by mass or more In the present invention, the residual solvent test is a reference test, and rank C or higher is a passing level of this test.

<Test Example 6: Peelability test>
In each laminated support prepared above, the peel force between the peelable support and the hard coat layer was measured to evaluate the peelability of the peelable support from the hard coat layer.
Using a Tensilon universal material testing machine RTF-1210 (manufactured by A & D Co., Ltd.) with a trigger for peeling (cutting with a cutter knife) at the interface between the peelable support and the hard coat layer of the laminated support. The peeling force when peeled in the 90 ° direction was measured under the conditions of a measurement temperature of 25 ° C., a relative humidity of 60%, a load cell of 50 N, and a peeling speed of 300 mm / min. This peeling force was evaluated based on the following evaluation criteria.
A: Peeling force is 0.01 N / 25 mm or more and less than 2 N / 25 mm B: Peeling force is 2 N / 25 mm or more and less than 5 N / 25 mm In the present invention, the peelability test is a reference test, and rank B or more is Passing level of the exam.

As shown in Table 1, none of the comparative polarizing plates CP-1 to CP-4 and CP-6 satisfied all of interlayer adhesion, polarizer durability and scratch resistance.
That is, the polarizing plate CP-1 not provided with the moisture-proof layer was inferior in polarizer durability. Moreover, even if it is a polarizing plate provided with the moisture proof layer, if it is a moisture proof layer which consists of hardened | cured material which contains a (meth) acrylate component and does not contain a cyclic polyolefin component (polarizing plate CP-6), sufficient polarizer It did not show durability. On the other hand, the polarizing plate CP-2 having no hard coat layer was inferior in scratch resistance. Further, the polarizing plate CP-3 provided with a hard coat layer made of a cured product containing a bifunctional acrylate component as a constituent component was not sufficiently scratch resistant. Further, the polarizing plate CP-4 having a moisture-proof layer made of a cured product containing a cyclic polyolefin component and no (meth) acrylate component does not have sufficient interlayer adhesion, and further has a large amount of residual solvent. It was.

On the other hand, all of the polarizing plates P-1 to P-20 of the present invention satisfied all of interlayer adhesion, polarizer durability and scratch resistance at a high level. It can be seen that such excellent characteristics are also shown in the laminate of the present invention having no cyclic polyolefin film in each polarizing plate.
As described above, the laminate of the present invention has a high level of interlayer adhesion and scratch resistance, and can exhibit a high degree of polarizer durability when incorporated into an image display device as a polarizing plate. In addition, the polarizing plate of the present invention has high interlayer adhesion between the hard coat layer and the moisture-proof layer, and exhibits high polarizer durability and excellent scratch resistance even in a high-temperature and high-humidity environment. It can be seen that by incorporating the laminate or polarizing plate of the present invention into an image display device, deterioration of image quality can be effectively suppressed even in the high temperature and high humidity environment.
Further, as described above, the production method of the present invention can form the hard coat layer and the moisture-proof layer in one pass, and can produce the laminate or polarizing plate of the present invention with high productivity.

DESCRIPTION OF SYMBOLS 10 Laminate 11 Polarizer layer 12 Moisture-proof layer 13 Hard coat layer 15 Polarizing plate 16 Protective film 20 Liquid crystal display device 21 First (upper) polarizing plate 22 First polarizing plate absorption axis direction 23 First (on liquid crystal cell) electrode Substrate 24 Liquid crystal layer 25 Second (lower liquid crystal cell) electrode substrate 26 Second (lower) polarizing plate 27 Direction of second polarizing plate absorption axis

Claims (13)

A laminate having a polarizer, a moisture-proof layer and a hard coat layer in this order,
The moisture-proof layer is composed of a cured product comprising a cyclic polyolefin component and an acrylate or methacrylate component as constituent components,
The laminated body which the said hard-coat layer consists of hardened | cured material which has a trifunctional or more than trifunctional acrylate or methacrylate component as a structural component. The cured product of the moisture-proof layer is a cured product of a composition containing a cyclic polyolefin, an acrylate or methacrylate compound and an initiator,
The laminate according to claim 1, wherein the cured product of the hard coat layer is a cured product of a composition containing a tri- or higher functional acrylate or methacrylate compound and an initiator.   The laminate according to claim 1 or 2, wherein a ClogP value of the acrylate or methacrylate component in the cured product forming the moisture-proof layer is 3.0 to 7.0.   Content of the said acrylate or methacrylate component in the hardened | cured material which forms the said moisture-proof layer is 5-60 mass% with respect to the total mass of the said cyclic polyolefin component and the said acrylate or methacrylate component. The laminate according to any one of the above.   The laminate according to any one of claims 1 to 4, wherein the acrylate or methacrylate component in the cured product forming the moisture-proof layer includes an aliphatic ring structure.   The laminated body according to any one of claims 1 to 5, wherein a glass transition temperature Tg of the cyclic polyolefin component is 60 to 160 ° C.   7. The average value of the number of reactive groups / molecular weight of the trifunctional or higher functional acrylate or methacrylate component in the cured product forming the hard coat layer is 0.0070 to 0.0095. 7. Laminated body.   The laminate according to any one of claims 1 to 7, wherein the moisture-proof layer has a thickness of 2 to 30 µm, and the hard coat layer has a thickness of 2 to 15 µm.   The polarizing plate containing the laminated body of any one of Claims 1-8.   An image display device comprising the polarizing plate according to claim 9. A method for producing a laminate having a polarizer, a moisture-proof layer and a hard coat layer in this order,
Curing a composition containing a tri- or higher functional acrylate or methacrylate compound and an initiator on a peelable support to form the hard coat layer;
Curing a composition containing a cyclic polyolefin, an acrylate or methacrylate compound and an initiator on the surface of the hard coat layer to form the moisture-proof layer;
Bonding the moisture-proof layer and a polarizer of a laminated support in which the hard coat layer and the moisture-proof layer are formed in this order on the peelable support, and peeling the peelable support;
The manufacturing method of the laminated body containing this.   The manufacturing method of the laminated body of Claim 11 in which the said peelable support body consists of polyethylene terephthalate resin.   The method for producing a laminate according to claim 11 or 12, wherein the peelable support has a thickness of 10 to 100 µm.

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