CN110275235A

CN110275235A - The manufacturing method of optical laminate with adhesive layer

Info

Publication number: CN110275235A
Application number: CN201910191239.4A
Authority: CN
Inventors: 名田敬之
Original assignee: Sumitomo Chemical Co Ltd
Current assignee: Sumitomo Chemical Co Ltd
Priority date: 2018-03-15
Filing date: 2019-03-13
Publication date: 2019-09-24
Also published as: KR20190109266A; JP2019159199A

Abstract

Manufacturing method by the optical laminate with adhesive layer obtained by optical film, first bonding agents cured layer, the first liquid crystal layer, second bonding agents cured layer, the second liquid crystal layer and bonding layer stackup includes: the process for obtaining the liquid crystal layer laminates with substrate layer, make the first liquid crystal layer and the facing mode of the second liquid crystal layer across second bonding agents cured layer to press from both sides, by the first liquid crystal layer with substrate layer with the second liquid crystal layer stackup of substrate layer；The process for obtaining liquid crystal layer laminates at least removes first base material layer from the liquid crystal layer laminates with substrate layer；The process for obtaining optical laminate is exposed surface side the first of the liquid crystal layer laminates exposed because removing first base material layer and is pressed from both sides across first bonding agents cured layer laminated optical film；From the process of liquid crystal layer laminates or optical laminate the second substrate layer of removing with substrate layer；With the process for exposing laminate adhesive layer in surface side the second of the optical laminate exposed by the second substrate layer of removing.

Description

The manufacturing method of optical laminate with adhesive layer

Technical field

The present invention relates to a kind of manufacturing methods of optical laminate with adhesive layer.

Background technique

Use the organic EL display device of Organic Light Emitting Diode (OLED) can not only compared with liquid crystal display device etc. It enough realizes lightweight, slimming, and the high image quality such as large-scale visual angle, quick response speed, high contrast may be implemented, Therefore obtained in the various fields such as smart phone and TV, digital camera using.In addition, for organic EL display device, Due to ultra-thin and can show without using backlight, the device shape of bending, winding etc also proposed.Organic EL is aobvious In showing device, in order to inhibit reduction visual as caused by the reflection of ambient light, it is known to be improved using circularly polarizing plate etc. The way of antireflection property.

Such as in patent document 1 and 2, as the film for being applied to the image display panels such as organic EL display device, record The optical film with anti-reflective function is crossed, historically, which has the phase separation layer formed using liquid crystal material.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2015-230386 bulletin

Patent document 2: Japanese Unexamined Patent Publication 2015-79256 bulletin

Summary of the invention

Problem to be solved by the invention

For optical film as described above, in order not to damage lightweight, the slimming of the feature as display device, it is desirable that More than existing level slimming, bendability.In addition, above-mentioned optical film is used after fitting in optical display element, however one It is bent that denier generates so-called warp in optical film, that is, the side for fitting in optical display element becomes lowland curling, then can be because by light Film is learned to be mixed into bubble or formation fold when be bonded with optical display element and have and be easy to generation and observed as unevenness etc. no The trend of good situation.This not good situation becomes the bad reason of image display panel, and therefore, it is desirable to inhibit the anti-of optical film Curling.

The object of the present invention is to provide can manufacture the system for inhibiting the optical laminate with adhesive layer of warp song Make method.

The method for solving problem

The present invention provides the manufacturing method of the optical laminate with adhesive layer as shown below.

(1) a kind of manufacturing method of the optical laminate with adhesive layer, be by optical film, first bonding agents cured layer, The optical layer of adhesive layer is had obtained by first liquid crystal layer, second bonding agents cured layer, the second liquid crystal layer and bonding layer stackup The manufacturing method of stack,

The manufacturing method includes:

Prepare the process of the first liquid crystal layer with substrate layer, first liquid crystal layer with substrate layer has the first base Material layer and first liquid crystal layer for forming polymerizable liquid crystal compound polymerization on the first base material layer；

Prepare the process of the second liquid crystal layer with substrate layer, second liquid crystal layer with substrate layer has the second base Material layer and second liquid crystal layer for forming polymerizable liquid crystal compound polymerization on second substrate layer；

The process for obtaining the liquid crystal layer laminates with substrate layer is made with folder across the second bonding agents cured layer described First liquid crystal layer and the facing mode of second liquid crystal layer, first liquid crystal layer with substrate layer is had with described Second liquid crystal layer stackup of substrate layer and obtain the liquid crystal layer laminates with substrate layer；

The process for obtaining liquid crystal layer laminates at least removes described first from the liquid crystal layer laminates with substrate layer Substrate layer and obtain liquid crystal layer laminates；

The process for obtaining optical laminate, in the liquid crystal layer laminates exposed because removing the first base material layer First exposes surface side, and folder obtains optical laminate across optical film described in first bonding agents solidification layer stackup；

The work of second substrate layer is removed from the liquid crystal layer laminates with substrate layer or the optical laminate Sequence；With

It is described viscous to expose surface side stacking the second of the optical laminate exposed because removing second substrate layer The process for closing layer.

(2) according to the manufacturing method for the optical laminate with adhesive layer recorded in (1), wherein

The process for obtaining optical laminate includes:

The process for forming first bonding agents composition layer, described in the optical film and the liquid crystal layer laminates At least one party in first exposed surface forms the first bonding agents composition comprising being used to form the first bonding agents cured layer First bonding agents composition layer；With

The process for forming the first bonding agents cured layer, in folder across the first bonding agents composition layer described the After one exposes the surface side stacking optical film, the first bonding agents composition layer is solidified.

(3) according to the manufacturing method for the optical laminate with adhesive layer recorded in (1) or (2), wherein

It is described to obtain the process of liquid crystal layer laminates with substrate layer and include:

The process for forming second bonding agents composition layer, in first liquid of first liquid crystal layer with substrate layer At least one party in second liquid crystal layer of crystal layer and second liquid crystal layer with substrate layer is formed comprising being used for Form the second bonding agents composition layer of the adhesive composite of the second bonding agents cured layer；With

The process for forming the second bonding agents cured layer, made with folder across the second bonding agents composition layer it is described First liquid crystal layer and the facing mode of second liquid crystal layer, first liquid crystal layer with substrate layer is had with described After second liquid crystal layer stackup of substrate layer, the second bonding agents composition layer is solidified.

(4) manufacturing method for the optical laminate with adhesive layer recorded according to any one of (1)~(3), wherein

The process for obtaining liquid crystal layer laminates is the liquid crystal layer laminates removing described the from described with substrate layer One substrate layer and the process for not removing second substrate layer,

The manufacturing method includes the process that second substrate layer is removed from the optical laminate.

(5) manufacturing method for the optical laminate with adhesive layer recorded according to any one of (1)~(3), wherein

The process for obtaining liquid crystal layer laminates is the liquid crystal layer laminates removing described the from described with substrate layer One substrate layer and second substrate layer and the process for obtaining liquid crystal layer laminates.

(6) manufacturing method for the optical laminate with adhesive layer recorded according to any one of (1)~(5), wherein

The process of the laminate adhesive layer includes:

Prepare be laminated the adhesive layer and peeling layer the adhesive layer with peeling layer process and

The adhesive layer of the adhesive layer with peeling layer is bonded with the second exposed surface of the optical laminate The process of the peeling layer is removed afterwards.

(7) a kind of manufacturing method of the optical laminate with adhesive layer, is to be sequentially laminated with optical film, first bonding agents The optical layer with adhesive layer of cured layer, the first liquid crystal layer, second bonding agents cured layer, the second liquid crystal layer and adhesive layer The manufacturing method of stack,

The manufacturing method includes:

The process for obtaining the liquid crystal layer laminates with substrate layer is made with folder across the second bonding agents cured layer described First liquid crystal layer and the facing mode of second liquid crystal layer, first liquid crystal layer with substrate layer is had with described Second liquid crystal layer stackup of substrate layer；

The process for obtaining liquid crystal layer laminates at least removes described second from the liquid crystal layer laminates with substrate layer Substrate layer and obtain liquid crystal layer laminates；

The process for obtaining the liquid crystal layer laminates with adhesive layer, described in exposing because removing second substrate layer The second of liquid crystal layer laminates exposes surface side, and the adhesive layer is laminated and obtains the liquid crystal layer laminates with adhesive layer；

Described in the liquid crystal layer laminates with substrate layer or the liquid crystal layer laminates removing with adhesive layer The process of first base material layer；With

First of the liquid crystal layer laminates with adhesive layer described in exposing because removing the first base material layer exposes Surface side presss from both sides the process for solidifying optical film described in layer stackup across the first bonding agents.

(8) according to the manufacturing method for the optical laminate with adhesive layer recorded in (7), wherein

It is described to obtain the process of liquid crystal layer laminates with adhesive layer and include:

Described the second of the adhesive layer of the adhesive layer with peeling layer and the liquid crystal layer laminates is exposed Face paste removes peeling layer process after closing.

(9) manufacturing method for the optical laminate with adhesive layer recorded according to any one of (1)~(8), wherein institute Stating optical film includes polarization plates.

(10) manufacturing method for the optical laminate with adhesive layer recorded according to any one of (1)~(9), wherein At least one side that the optical film is included in polarization plates is laminated with the polarization plates with protecting film of protecting film.

Invention effect

According to the present invention it is possible to manufacture the optical laminate with adhesive layer for inhibiting warp song.

Detailed description of the invention

Fig. 1 (a)~(d) be schematically show the optical laminate with adhesive layer of the invention manufacturing process one The schematic sectional view of example.

Fig. 2 (a) and be (b) manufacturing process for schematically showing the optical laminate shown in FIG. 1 with adhesive layer The schematic sectional view of further part.

Fig. 3 (a) and be (b) manufacturing process for schematically showing the optical laminate shown in Fig. 2 with adhesive layer The schematic sectional view of further part.

Fig. 4 (a) and be (b) manufacturing process for schematically showing the optical laminate shown in Fig. 3 with adhesive layer The schematic sectional view of further part.

Fig. 5 (a) and be (b) manufacturing process for schematically showing the optical laminate shown in Fig. 4 with adhesive layer The schematic sectional view of further part.

Fig. 6 (a)~(d) is the manufacture work for schematically showing the optical laminate of others of the invention with adhesive layer The schematic sectional view of an example of sequence.

Fig. 7 (a)~(e) is the manufacture work for schematically showing the optical laminate with adhesive layer being different from the present invention The schematic sectional view of an example of sequence.

Fig. 8 (a)~(d) is the manufacturing process for schematically showing the optical laminate shown in Fig. 7 with adhesive layer The schematic sectional view of further part.

Fig. 9 (a) and be (b) manufacturing process for schematically showing the optical laminate shown in Fig. 8 with adhesive layer The schematic sectional view of further part.

The explanation of symbol

10,10p has the first liquid crystal layer of substrate layer, 11,11p first base material layer, 12, the first liquid crystal layer of 12p, 20,20p The second liquid crystal layer with substrate layer, 21, the second substrate layer of 21p, 22, the second liquid crystal layer of 22p, 25 have the second of composition layer Liquid crystal layer, 31 first bonding agents cured layers, the 1st ' adhesive layer of 31p, 32 second bonding agents cured layers, the combination of 32a second bonding agents Nitride layer, the 2nd ' adhesive layer of 32p, 33 second adhesive layers, the 3rd ' adhesive layer of 33p, the 40 liquid crystal layer laminates with substrate layer, 41, 43 liquid crystal layer laminates, 45 have the liquid crystal layer laminates of adhesive layer, and 50 have the first adhesive layer of adhesive layer, and 52p the 2nd ' is shelled Absciss layer, 53 peeling layers, the 3rd ' peeling layer of 53p, 58 have the second adhesive layer of peeling layer, and 60,60p optical film, 61 with bonding The optical film of layer, 70,70p optical laminate, 71, optical laminate (optical laminate) of the 71p with substrate layer, 80,81 bands There is the optical laminate of adhesive layer.

Specific embodiment

Hereinafter, referring to attached drawing to the preferred embodiment party of the manufacturing method of the optical laminate with adhesive layer of the invention Formula is illustrated.

[embodiment 1 (manufacturing method of the optical laminate with adhesive layer)]

FIG. 1 to FIG. 5 is to schematically show the manufacturing process of the optical laminate with adhesive layer of present embodiment The schematic sectional view of an example.In figure, W indicates width direction.Utilize the optical laminate 80 with adhesive layer of present embodiment Manufacturing method manufacture such as Fig. 5 (b) of the optical laminate 80 with adhesive layer it is shown, be sequentially laminated with optical film 60, first Bonding agent cured layer 31, the first liquid crystal layer 12, second bonding agents cured layer 32, the second liquid crystal layer 22 and adhesive layer 33.It can be with There is peeling layer 53 with 22 opposite side of the second liquid crystal layer in adhesive layer 33.

The manufacturing method of optical laminate 80 with adhesive layer includes the prepared shown in Fig. 1 (a) with substrate layer The process of the second liquid crystal layer 20 shown in one liquid crystal layer 10 and Fig. 1 (b) with substrate layer.The first liquid crystal with substrate layer The first liquid crystal that layer 10 is formed polymerizable liquid crystal compound polymerization with first base material layer 11 and on first base material layer 11 Layer 12, the second liquid crystal layer 20 with substrate layer have the second substrate layer 21 and on the second substrate layer 21 by polymerizable liquid crystal Second liquid crystal layer 22 of compound polymerization and formation.

The process for preparing the first liquid crystal layer 10 with substrate layer may include the process to form the first liquid crystal layer 12, that is, Liquid crystal layer formation composition of the coating comprising polymerizable liquid crystal compound and drying, utilize ultraviolet light on first base material layer 11 Polymerizable liquid crystal compound polymerize and is allowed to solidification to form the first liquid crystal layer 12 by the irradiation of isoreactivity energy-ray.Equally Ground, the process for preparing the second liquid crystal layer 20 with substrate layer may include the process to form the second liquid crystal layer 22, that is, second On substrate layer 21, liquid crystal layer formation composition of the coating comprising polymerizable liquid crystal compound and drying are living using ultraviolet light etc. Property energy-ray irradiation by polymerizable liquid crystal compound polymerize and be allowed to solidification to formed the second liquid crystal layer 22.

Then, the process to form second bonding agents composition layer 32a is carried out, in the second liquid crystal layer 20 with substrate layer The surface of second liquid crystal layer, 22 side forms the of the second bonding agents composition comprising being used to form second bonding agents cured layer 32 Two adhesive composite layer 32a.Using the process, available the second liquid crystal layer 25 (Fig. 1 (c)) with composition layer.

The second liquid crystal layer 25 with composition layer is sequentially laminated with second bonding agents composition layer as shown in Fig. 1 (c) 32a, the second liquid crystal layer 22 and the second substrate layer 21.The process for forming second bonding agents composition layer 32a may include in band There is the process of the surface coating second bonding agents composition of 22 side of the second liquid crystal layer of the second liquid crystal layer 20 of substrate layer.

By the second bonding agents composition layer 32a of resulting the second liquid crystal layer 25 with composition layer and with substrate After the first liquid crystal layer 12 stacking of first liquid crystal layer 10 of layer (Fig. 1 (d)), the shape by second bonding agents composition layer 32a solidification At second bonding agents cured layer 32, the liquid crystal layer laminates 40 (Fig. 2 (a)) with substrate layer are obtained.Combine second bonding agents The cured method of nitride layer 32a can be properly selected according to the type etc. of second bonding agents composition, for example, active Energy-ray irradiation, heat treatment, addition of curing agent etc..Exist for type, its curing method of second bonding agents composition It describes below.Liquid crystal layer laminates 40 with substrate layer such as shown in Fig. 2 (a), are sequentially laminated with first base material layer 11, the first liquid Crystal layer 12, second bonding agents cured layer 32, the second liquid crystal layer 22 and the second substrate layer 21.The liquid crystal of substrate layer is had from this Layer laminates 40 remove first base material layer 11, do not remove the second substrate layer 21, thus obtain liquid crystal layer laminates 41 (Fig. 2 (b)). Liquid crystal layer laminates 41 such as shown in Fig. 2 (b), are sequentially laminated with the first liquid crystal layer 12, second bonding agents cured layer 32, the second liquid crystal Layer 22 and the second substrate layer 21.

Next, carrying out forming the first bonding agents comprising being used to form first bonding agents cured layer 31 on optical film 60 The process of the first bonding agents composition layer 31a of composition.Using the process, the available optical film 61 with composition layer (Fig. 3 (a)).Optical film 61 with composition layer such as Fig. 3 (a) is shown, by optical film 60 and first bonding agents composition layer 31a It is laminated and obtains.The process for forming first bonding agents composition layer 31a may include in the first bonding of the surface of optical film 60 coating The process of agent composition.

Thereafter, by the first bonding agents composition layer 31a of the optical film 61 with composition layer and because removing first base material The first liquid crystal layer 12 (the first exposed surface) fitting (Fig. 3 (b)) of layer 11 and the liquid crystal layer laminates 41 of exposing.Thereafter, by first Adhesive composite layer 31a solidification, is consequently formed first bonding agents cured layer 31 and obtains the optical laminate with substrate layer 71 (optical laminate) (Fig. 4 (a)).Allow the cured method of first bonding agents composition layer 31a according to first bonding agents group The type etc. for closing object properly selects, for example, active energy beam irradiation, heat treatment, addition of curing agent etc.. Type, its curing method of first bonding agents composition are described below.Optical laminate 71 such as Fig. 4 with substrate layer (a) shown in, optical film 60, first bonding agents cured layer 31, the first liquid crystal layer 12, second bonding agents cured layer are sequentially laminated with 32, the second liquid crystal layer 22 and the second substrate layer 21.The second substrate layer is removed from the optical laminate 71 with substrate layer 21, it is hereby achieved that optical laminate 70 (Fig. 4 (b)).Optical laminate 70 is sequentially laminated with optical film 60, first bonding agents Cured layer 31, the first liquid crystal layer 12, second bonding agents cured layer 32 and the second liquid crystal layer 22.

Then, prepare the adhesive layer 58 (Fig. 5 (a)) that peeling layer is had obtained by peeling layer 53 and adhesive layer 33 are laminated. The process for preparing the adhesive layer 58 with peeling layer may include coating adhesive composition and being dried on peeling layer 53 Deng and the process that forms adhesive layer 33.In addition, as needed, also can be set adhesive layer 33 and peeling layer 53 opposite side The other peeling layers claddings in face process.

Expose by the adhesive layer 33 of the adhesive layer 58 with peeling layer prepared and because of the second substrate layer 21 of removing Second liquid crystal layer 22 (the second exposed surface) of optical laminate 70 is bonded, and obtains 80 (Fig. 5 of optical laminate with adhesive layer (b)).The optical laminate 80 with adhesive layer obtained at this time has peeling layer 53.In the optics that this is had to adhesive layer In the case that laminated body 80 is laminated in optical display element, peeling layer 53 can be removed, adhesive layer 33 and optics are shown into member Part is bonded and image display panel is made.

In the manufacturing method of the above-mentioned optical laminate 80 with adhesive layer, use in first base material layer 11, second The two (is referred to as " substrate layer " sometimes below by substrate layer 21 together.) on by polymerizable compound polymerize and be allowed to the band having cured There are the first liquid crystal layer 10 of substrate layer, the second liquid crystal layer 20 with substrate layer (to be below sometimes referred to as the two together " with base The liquid crystal layer of material layer ".).In liquid crystal layer with substrate layer, coating includes polymerizable liquid crystal compound usually on substrate layer Liquid crystal layer formation composition is simultaneously dried, and the irradiation using ultraviolet light isoreactivity energy-ray makes polymerizable liquid crystal compound It polymerize and is allowed to solidify, it is possible thereby to forms the first liquid crystal layer 12, the two (is referred to as by the second liquid crystal layer 22 together sometimes below " liquid crystal layer ".).Speculate in by the above-mentioned liquid crystal layer for the processes such as being coated and dried, polymerizeing, solidifying and formed, remains The drying for the liquid crystal layer formation composition being coated with, along with the polymerization of polymerizable liquid crystal compound solidification when the receipts that generate Stress under compression.It is believed that in the state that liquid crystal layer is present in the liquid crystal layer with substrate layer on substrate layer, above-mentioned contraction Stress is inhibited by substrate layer, however as described above, since substrate layer is in the work of optical laminate 80 of the manufacture with adhesive layer It is stripped in sequence, therefore the shrinkage stress of liquid crystal layer is released because of the removing of substrate layer.At this point, if liquid crystal layer is fitted in light Film is learned, then is generated in the laminated body for having the shrinkage stress released by peeling base layer to make optical film and liquid crystal layer with liquid crystal layer Side is that inside is warped into bowed deformation (hereinafter sometimes referred to as " warp is bent ".) the case where.

The generation of this curling is believed that by after optical film 60 and liquid crystal layer stackup, peeling base layer and release The number of the shrinkage stress of tapping crystal layer is more, then is more easy to generate.For example, as shown in fig. 7~fig. 9, on optical film successively Stratified liquid crystal layer and in the case where manufacturing the optical laminate with adhesive layer, after optical film and liquid crystal layer stackup, release liquid The number of the shrinkage stress of crystal layer has the tendency that becoming more.Fig. 7~Fig. 9 be schematically show with shown in FIG. 1 to FIG. 5 with viscous The signal of an example of the manufacturing process of the different optical laminate with adhesive layer of the manufacturing process of the optical laminate of conjunction layer Cross-sectional view.

In the manufacturing method of optical laminate 80p shown in Fig. 9 (b) with adhesive layer, firstly, will have in the first base The first liquid crystal layer with substrate layer for the first liquid crystal layer 12p for forming polymerizable liquid crystal compound polymerization on material layer 11p The first side liquid crystal layer 12p of 10p (Fig. 7 (b)) fits in will be obtained by optical film 60p and the 1st ' adhesive layer 31p stacking with viscous Close the 1st ' the adhesive layer 31p (Fig. 7 (c)) of the optical film 61p (Fig. 7 (a)) of layer.Thereafter, first base material layer 11p (Fig. 7 is removed (d)), the first liquid crystal layer 12p exposed by the removing is pasted with the 2nd ' adhesive layer 32p being formed on the 2nd ' peeling layer 52p It closes (Fig. 7 (e)), removes the 2nd ' peeling layer 52p (Fig. 8 (a)).

Then, will there is the second liquid crystal layer for polymerizeing polymerizable liquid crystal compound on the second substrate layer 21p and being formed The second side liquid crystal layer 22p of the second liquid crystal layer 20p (Fig. 8 (b)) with substrate layer of 22p fits in the 2nd ' adhesive layer 32p, obtains To the optical laminate 71p (Fig. 8 (c)) for having substrate layer.The second substrate is removed from the optical laminate 71p with substrate layer Layer 21p, obtains optical laminate 70p (Fig. 8 (d)).

Then, the second liquid crystal layer 22p removing the second substrate layer 21p of optical laminate 70p exposed be formed in The the 3rd ' adhesive layer 33p (Fig. 9 (a)) fitting on 3rd ' peeling layer 53p, obtains optical laminate 80p (Fig. 9 with adhesive layer (b))。

As described in Fig. 7~manufacturing process shown in Fig. 9, folder is across the 1st ' adhesive layer 31p by the first liquid crystal layer 12p It is laminated in after optical film 60p and removes first base material layer 11p, the second liquid crystal layer 22p is laminated in the across the 2nd ' adhesive layer 32p by folder The second substrate layer 21p is removed after on one liquid crystal layer 12p.It thereby it is assumed that, in removing first base material layer 11p and the second substrate layer In each process of 21p, the shrinkage stress of the first liquid crystal layer 12p and the second liquid crystal layer 22p respectively obtain release, therefore are easy in light It learns and generates warp song in laminated body 70p.

It is different, the manufacturing method of the optical laminate 80 with adhesive layer of present embodiment shown in FIG. 1 to FIG. 5 In, firstly, pressing from both sides the first liquid crystal layer 10 with substrate layer with the second liquid crystal layer 20 with substrate layer across second bonding agents Cured layer 32, which is laminated, obtains the liquid crystal layer laminates 40 (Fig. 2 (a)) with substrate layer.Thereafter, first base material layer 11 is removed, is obtained To the liquid crystal layer laminates 41 (Fig. 2 (b)) for the shrinkage stress for releasing the first liquid crystal layer 12, by the liquid crystal layer laminates 41 and light It learns the folder of film 60 and (Fig. 4 (a)) is laminated across first bonding agents cured layer 31, remove the second substrate layer 21 (Fig. 4 (b)).Therefore, according to The first liquid crystal layer 12 and the second liquid crystal layer 22 is laminated in the manufacturing method of optical laminate 80 with adhesive layer on optical film 60 The stripping process carried out afterwards is only the process for removing the second substrate layer 21, compared with Fig. 7~manufacturing process shown in Fig. 9, in light It learns after liquid crystal layer is laminated on film, it is possible to reduce discharge the number of the shrinkage stress of liquid crystal layer.It is possible thereby to think, and Fig. 7 is utilized Optical laminate 70p, the optical laminate 80p with adhesive layer that~manufacturing process shown in Fig. 9 obtains are compared, FIG. 1 to FIG. 5 Shown in adhesive layer optical laminate 80 manufacturing method in, it is possible to reduce optical laminate 70, have adhesive layer Optical laminate 80 in the warp that generates it is bent.

In addition, being had shown in Fig. 4 (a) in the optical laminate 71 of substrate layer, 12 quilt of optical film 60 and the first liquid crystal layer Folder is laminated across first bonding agents cured layer 31, and the first liquid crystal layer 12 and the second liquid crystal layer 22 are pressed from both sides and solidified across second bonding agents Layer 32 is laminated.On the other hand, in the optical laminate 71p shown in Fig. 8 (c) with substrate layer, optical film 60p and the first liquid crystal Layer 12p is pressed from both sides to be laminated across the 1st ' adhesive layer 31p, and the first liquid crystal layer 12p and the second liquid crystal layer 22p are pressed from both sides across the 2nd ' adhesive layer 32p stacking.First bonding agents cured layer 31, second bonding agents cured layer 32 and the 1st ' adhesive layer 31p, the 2nd ' adhesive layer 32p phase It is difficult to deform than rigid high.Therefore it may be speculated that even if the optical laminate 71 shown in Fig. 4 (a) with substrate layer is shelled From the second substrate layer 21, it is also easy to remain using first bonding agents cured layer 31, second bonding agents cured layer 32 and inhibits One liquid crystal layer 12, the second liquid crystal layer 22 shrinkage stress state.It is different, it is believed that in the band shown in Fig. 8 (c) In the case where thering is the optical laminate 71 of substrate layer to remove the second substrate layer 21, the shadow of the shrinkage stress by the second liquid crystal layer 22 It rings, the 1st ' adhesive layer 31p, the 2nd ' adhesive layer 32p, optical film 60p are easily deformable, are easy to generate warp in optical laminate 70 It is bent.Optics stacking with the optical laminate 70p obtained using Fig. 7~manufacturing process shown in Fig. 9, with adhesive layer as a result, Body 80p is compared, and in the manufacturing method of the optical laminate 80 shown in FIG. 1 to FIG. 5 with adhesive layer, is easily reduced optics stacking The warp generated in body 70, the optical laminate 80 with adhesive layer is bent.

By reducing the warp generated in optical laminate 70 song as described above, the optical laminate 70 will used to obtain To the optical laminate 80 with adhesive layer fit in optical display element when, can inhibit have adhesive layer optical layer It is mixed into bubble between stack and optical display element, generate fold or generates the not good situation for being bonded mistake etc.

In addition, as shown in Fig. 7 (e), after by optical film 60p and the first liquid crystal layer 12p stacking, sometimes in the first liquid crystal layer 2nd ' adhesive layer 32p is set on 12p.In this case, as described above, in the 2nd ' adhesive layer that will be set on the 2nd ' peeling layer 52p After 32p is laminated on the first liquid crystal layer 12p together with the 2nd ' peeling layer 52p, there is the case where the 2nd ' peeling layer 52p of removing.Removing The process of 2nd ' peeling layer 52p can also become the reason for being easy to that warp song is generated in optical laminate 70p.

On the other hand, the manufacturing method of the optical laminate 80 with adhesive layer of present embodiment shown in FIG. 1 to FIG. 5 In, the first liquid crystal layer 12 is bonded by folder across second bonding agents cured layer 32 with the second liquid crystal layer 22, is obtained shown in Fig. 2 (b) Liquid crystal layer laminates 41.Hereafter, which is laminated in optical film 60, therefore having for present embodiment bonds In the manufacturing method of the optical laminate 80 of layer, with Fig. 7~optical laminate 80p shown in Fig. 9 with adhesive layer manufacture Process is compared, at least the process there is no the second peeling layer 52p of removing, thus can reduce be laminated in optical film 60 after remove The number of layer.It is understood that in the manufacturing method of the optical laminate 80 with adhesive layer, with the optics for having adhesive layer The manufacturing process of laminated body 80p compares, and the warp for being easy to inhibit to generate in the optical laminate 80 with adhesive layer is bent.

The thickness of optical film 60 contained in optical laminate is believed that for the warp song generated in optical laminate Degree, rigidity are smaller, then are more susceptible to the influence of the release of the shrinkage stress as caused by liquid crystal layer.It can be additionally considered to, substrate The thickness of layer, rigidity are bigger, then the shrinkage stress remained in liquid crystal layer is bigger, therefore is more susceptible to release when peeling base layer The influence for the shrinkage stress put.Therefore, the manufacturing method of the optical laminate of present embodiment is suitable for optical film 60 with a thickness of 2 μm or more and 500 μm or less of situation.The thickness of optical film 60 can be 10 μm or more, furthermore it is possible to be 350 μm hereinafter, It can be 200 μm or less, or 150 μm or less.

It should be noted that having the optical laminate of adhesive layer in order to manufacture in present embodiment and using, have First liquid crystal layer 10 of substrate layer, the second liquid crystal layer 20 with substrate layer, the second liquid crystal layer 25, optics with composition layer The membranoid substances such as laminated body 70, adhesive layer 58 with peeling layer are preferably the membranoid substance of long size, are preferably continuously carried on one side They carry out each process on one side.Width direction W is the direction orthogonal with the length direction of membranoid substance.

The manufacturing method of the optical laminate of present embodiment can be changed as variation as shown below.In addition, Can by above-mentioned embodiment and it is following shown in variation any combination.

(variation 1 of embodiment 1)

In above description, glued so that 22 side of the second liquid crystal layer for being used in the second liquid crystal layer 20 with substrate layer is equipped with second Connect the second liquid crystal layer 25 (Fig. 1 (c)) with composition layer of agent composition layer 32a, in second bonding agents composition layer 32a Upper laminated belt is enumerated and is illustrated in case where having the first liquid crystal layer 12 of the first liquid crystal layer 10 of substrate layer, however only The second liquid crystal layer 20 wanted available the first liquid crystal layer 11 by the first liquid crystal layer 10 with substrate layer and have substrate layer The second liquid crystal layer 22 press from both sides 40 (Fig. 2 of liquid crystal layer laminates with substrate layer for being laminated across second bonding agents cured layer 32 (a)), then it is not limited to this.For example, can be in 12 side of the first liquid crystal layer of the first liquid crystal layer 10 with substrate layer setting second Adhesive composite layer 32a, laminated belt has the of the second liquid crystal layer 20 of substrate layer on second bonding agents composition layer 32a After two liquid crystal layers 22, second bonding agents composition layer 32a is solidified to form second bonding agents cured layer 32.Alternatively, it is also possible to The second of 12 side of the first liquid crystal layer and the second liquid crystal layer 20 with substrate layer that have the first liquid crystal layer 10 of substrate layer 22 side both sides of liquid crystal layer form second bonding agents composition layer 32a.

(variation 2 of embodiment 1)

In above description, obtained so that first bonding agents composition layer 31a is arranged in optical film 60 with composition layer Optical film 61 (Fig. 3 (a)), the stratified liquid crystal on the first bonding agents composition layer 31a of the optical film 61 with composition layer It enumerates and is illustrated in case where layer laminates 41, as long as however can expose because removing first base material layer 11 The exposed surface (the first liquid crystal layer 12) of liquid crystal layer laminates 41 is pressed from both sides across first bonding agents composition layer 31a laminated optical film 60, Just it is not limited to this.For example, it is viscous to be equipped with first in the available exposed surface (the first liquid crystal layer 12) in liquid crystal layer laminates 41 Light is laminated on first bonding agents composition layer 31a in the liquid crystal layer laminates with composition layer for meeting agent composition layer 31a After learning film 60, first bonding agents composition layer 31a is solidified to form first bonding agents cured layer 31.In this case, having group As long as the liquid crystal layer laminates for closing nitride layer successively have first bonding agents composition layer 31a, the first liquid crystal layer 12, second bonding agents Cured layer 32, the second liquid crystal layer 22 and the second substrate layer 21.

(variation 3 of embodiment 1)

In above description, first base material layer 11 is removed with the liquid crystal layer laminates 40 shown in Fig. 2 (a) with substrate layer And it does not remove 21 ground of the second substrate layer and obtains liquid crystal layer laminates 41 shown in Fig. 2 (b), by optical film 60 and liquid crystal layer laminates 41 folders are enumerated in case where removing the second substrate layer 21 after the stacking of first bonding agents cured layer 31 and are illustrated, so And it's not limited to that.For example, it is also possible to which the liquid crystal layer laminates 40 shown in Fig. 2 (a) with substrate layer remove the first base Material layer 11 and the second substrate layer 21 and obtain liquid crystal layer laminates, in the liquid crystal layer stackup exposed because removing first base material layer 11 The exposing surface side of body is pressed from both sides across 31 laminated optical film 60 of first bonding agents cured layer.From the liquid crystal layer laminates 40 for having substrate layer It is viscous that liquid crystal layer laminates obtained by removing first base material layer 11 and the second substrate layer 21 are sequentially laminated with the first liquid crystal layer 12, second Connect agent cured layer 32 and the second liquid crystal layer 22.

[embodiment 2 (manufacturing method of the optical laminate with adhesive layer)]

Fig. 6 (a)~(d) is the manufacturing process for schematically showing the optical laminate with adhesive layer of present embodiment An example schematic sectional view.In figure, W indicates width direction.Utilize the optical laminate with adhesive layer of present embodiment Manufacturing method manufacture optical laminate 81 with adhesive layer and previous embodiment in illustrate have adhesive layer Optical laminate 80 (Fig. 5 (b)) is identical, as shown in Fig. 6 (d), be sequentially laminated with optical film 60, first bonding agents cured layer 31, First liquid crystal layer 12, second bonding agents cured layer 32, the second liquid crystal layer 22 and adhesive layer 33.It can also be in adhesive layer 33 There is peeling layer 53 with 22 opposite side of the second liquid crystal layer.

In the manufacturing method of optical laminate 81 with adhesive layer, with the manufacturing method illustrated in previous embodiment The liquid crystal layer laminates 40 for having substrate layer shown in Fig. 2 (a) are obtained in the same manner, prepare to have peeling layer shown in Fig. 5 (a) Adhesive layer 58.Process for obtaining the liquid crystal layer laminates 40 with substrate layer, as being based on Fig. 1 in previous embodiment (a) shown in~(e) and Fig. 2 (a) explanation, the process of the adhesive layer 58 for preparing to have peeling layer, such as previous embodiment In based on shown in Fig. 5 (a) explanation, therefore the description thereof will be omitted.

Then, the liquid crystal layer laminates 40 shown in Fig. 2 (a) with substrate layer are removed the second substrate layer 21 and are not removed First base material layer 11 obtains liquid crystal layer laminates 43 (Fig. 6 (a)).Liquid crystal layer laminates 43 such as shown in Fig. 6 (a), are sequentially laminated with First base material layer 11, the first liquid crystal layer 12, second bonding agents cured layer 32 and the second liquid crystal layer 22.It will be because removing the second base Material layer 21 and expose liquid crystal layer laminates 43 the second liquid crystal layer 22 (the second exposed surface) with have peeling layer adhesive layer 58 Adhesive layer 33 be bonded the liquid crystal layer laminates 45 (Fig. 6 (b)) obtained with adhesive layer.Liquid crystal layer stackup with adhesive layer Body 45 such as shown in Fig. 6 (b), is sequentially laminated with first base material layer 11, the first liquid crystal layer 12, second bonding agents cured layer 32, second Liquid crystal layer 22, adhesive layer 33 and peeling layer 53.

Next, preparing the optical film 61 for having composition layer shown in Fig. 3 (a).For obtaining with composition layer The process of optical film 61, as shown in illustrating in previous embodiment based on Fig. 3 (a) and (b), therefore the description thereof will be omitted.Thereafter, First base material layer 11 (Fig. 6 (c)) is removed from the liquid crystal layer laminates 45 with adhesive layer, is revealed because removing first base material layer 11 Laminated belt has the first bonding agents composition layer of the optical film 61 of composition layer on the first liquid crystal layer 12 (the first exposed surface) out After 31a, which is solidified, first bonding agents cured layer 31 is consequently formed and obtains with bonding The optical laminate 81 (Fig. 6 (d)) of layer.

In the manufacturing method of the above-mentioned optical laminate 81 with adhesive layer, obtain the first liquid crystal layer 12 and the second liquid Crystal layer 22 presss from both sides the liquid crystal layer laminates 43 being laminated across second bonding agents cured layer 32, then obtains on 22 upper layer of the second liquid crystal layer The liquid crystal layer laminates 45 with adhesive layer of folded adhesive layer 33.Hereafter, it is shelled from the liquid crystal layer laminates 45 with adhesive layer From first base material layer, folder is laminated with optical film 61 across first bonding agents cured layer 31, thus according to previous embodiment Middle the reasons why illustrating, identical reason was believed that the warp that can inhibit the resulting optical laminate 81 with adhesive layer It is bent.As a result, when the optical laminate 81 for having adhesive layer is fitted in optical display element, it can inhibit in optical laminate Be mixed between optical display element bubble, formed fold, generate be bonded the not good situations such as mistake.

It should be noted that having the optical laminate of adhesive layer in order to manufacture in present embodiment and using, have First liquid crystal layer 10 of substrate layer, the second liquid crystal layer 20 with substrate layer, the adhesive layer 58 with peeling layer, optical film 60, The membranoid substances such as the optical film 61 with composition layer are preferably all the membranoid substance of long size, preferably on one side continuously carry they one Side carries out each process.

Width direction W is the direction orthogonal with the length direction of membranoid substance.

The manufacturing method of the optical laminate of present embodiment can also be changed as variation as shown below.Separately Outside, can by above-mentioned embodiment and it is following shown in variation any combination.

(variation 1 of embodiment 2)

In above description, to obtain the optical film 61 shown in Fig. 3 (a) with composition layer and this had composition The first bonding agents composition layer 31a of the optical film 61 of layer is laminated in from the removing of liquid crystal layer laminates 45 first with adhesive layer Substrate layer 11 and enumerate and be illustrated in case where the first liquid crystal layer 12 for exposing, as long as however can be because of removing the One substrate layer 11 and expose the liquid crystal layer laminates 45 with adhesive layer the first exposed surface (the first liquid crystal layer 12) press from both sides across First bonding agents composition layer 31a laminated optical film 60, is just not limited to this.For example, first base material layer 11 can removed The liquid crystal layer laminates 45 with adhesive layer the first exposed surface (the first liquid crystal layer 12) on be arranged first bonding agents composition Layer 31a and the laminated optical film 60 on first bonding agents composition layer 31a.Alternatively, it is also possible to remove first base material layer Both sides in the first exposed surface (the first liquid crystal layer 12) of the 11 liquid crystal layer laminates 45 with adhesive layer and on optical film 60 Form first bonding agents composition layer 31a.

(variation 2 of embodiment 2)

In above description, the second substrate layer 21 is removed with the liquid crystal layer laminates 40 shown in Fig. 2 (a) with substrate layer And do not remove 11 ground of first base material layer obtain liquid crystal layer laminates 43 shown in Fig. 6 (a), by liquid crystal layer laminates 43 with have The adhesive layer 33 of the adhesive layer 58 of peeling layer is enumerated and is illustrated in case where removing first base material layer 11 after being laminated, so And it's not limited to that.For example, first base material can be removed from the liquid crystal layer laminates 40 with substrate layer shown in Fig. 2 (a) Layer 11 and second substrate layer 21 and obtain liquid crystal layer laminates, by the second liquid crystal layer side of the liquid crystal layer laminates with removing After the liquid crystal layer laminates for obtaining having adhesive layer are laminated in the adhesive layer 58 of layer, in the liquid crystal layer laminates for having adhesive layer 12 side of the first liquid crystal layer, press from both sides across first bonding agents composition layer 31a laminated optical film 60.In this case, liquid crystal layer stackup Body is sequentially laminated with the first liquid crystal layer 12, second bonding agents cured layer 32 and the second liquid crystal layer 22, the liquid crystal with adhesive layer Layer laminates are sequentially laminated with the first liquid crystal layer 12, second bonding agents cured layer 32, the second liquid crystal layer 22, adhesive layer 33, removing Layer 53.

More than, embodiments of the present invention and its variation are illustrated, however the present invention is not limited to these Embodiment and its variation, such as implement after each process of above embodiment and its variation can also being combined.Hereinafter, Common each process in all embodiment and its variation is described in detail.

(optical film)

Optical film can be polarizing film, polarizing film at least one side formed matcoveredn polarization plates, in polarization plates At least one side is laminated with the polarization plates with protecting film, reflectance coating, Semitransmissive reflectance coating, brightness enhancement film, the optics benefit of protecting film Repay film, film with anti-dazzle function etc..Optical film can be 1 layer of structure, be also possible to the stacking light of 2 layers or more of multilayered structure Learn film." polarizing film " so-called in this specification, referring to have makes when injecting the light of no polarization light with orthogonal with absorption axiss The layer of the property of the linear polarization light transmission of vibration plane.

(polarizing film)

It, can be using arbitrary suitable polarizing film as polarizing film." polarizing film " so-called in this specification, refers to and has Make the straight line of the property of the linear polarization light transmission with the vibration plane orthogonal with absorption axiss inclined when injecting the light of no polarization light Shake piece.For example, the resin film for forming polarizing film can be the resin film of single layer, it is also possible to two layers or more of stacked film.Polarization Piece can be solid obtained by being orientated dichroism pigment in polymerizable liquid crystal compound and polymerizeing polymerizable liquid crystal compound Change film.

As the concrete example for the polarizing film being made of the resin film of single layer, can enumerate to polyvinyl alcohol (below sometimes Referred to as " PVA ".) mesentery, part dimethoxym ethane PVA mesentery, the partly-hydrolysed film of vinyl-vinyl acetate copolymer system etc. be hydrophilic Property polymeric membrane implement using the dichroic substances such as iodine, dichroic dye dyeing processing and stretch processing polarizing film, Polyenoid system alignment films such as the dehydration treatment of PVA or the dehydrochlorinated products of polyvinyl chloride etc..Since optical characteristics is excellent, It is preferable to use by PVA mesentery iodine staining and polarizing film obtained by being uniaxially stretched.

Polyvinyl alcohol resin can be manufactured by the way that polyvinyl acetate system resin to be saponified.Polyvinyl acetate system tree Rouge other than it can be the polyvinyl acetate as the homopolymer of vinyl acetate, can also be vinyl acetate with can With the copolymer of the other monomers of vinyl acetate copolymerization.It, such as can as can be with the other monomers of vinyl acetate copolymerization To enumerate unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class, acrylic amide with ammonium etc..

The saponification degree of polyvinyl alcohol resin is usually 85~100 moles of % or so, preferably 98 moles of % or more.Poly- second Enol system resin can be modified, such as the polyvinyl formal being modified by aldehydes, polyvinyl alcohol contracting second also can be used Aldehyde etc..The degree of polymerization of polyvinyl alcohol resin is usually 1000~10000 or so, and preferably 1500~5000 or so.

Film obtained by this polyvinyl alcohol resin film is used by the former material film as polarizing film.By polyethenol series The method of resin film is not particularly limited, and can use well known method film.The film thickness of polyvinyl alcohol resin former material film For example, 10~100 μm or so, preferably 10~60 μm or so, more preferably 15~30 μm or so.

As the manufacturing method of other polarizing films, the manufacturing method comprised the following steps can be enumerated, that is, prepare first Base material film, the solution of the resins such as pva coating system resin on base material film, carry out removing drying etc. of solvent and in substrate Resin layer is formed on film.It should be noted that prime coat can be pre-formed in the face of the formation resin layer of base material film.As base The resin films such as PET can be used in material film.As the material of prime coat, can enumerate hydrophilic resin used in polarizing film The resin etc. being crosslinked.

Then, the moisture equal solvent amount of adjustment resin layer carries out uniaxial drawing to base material film and resin layer thereafter as needed It stretches, next, the dichroism pigments such as resin layer iodine are dyed and so that dichroism pigment is adsorbed in resin layer and is orientated.It connects down Come, dichroism pigment will be adsorbed with as needed and the resin layer being orientated is handled with boric acid aqueous solution, carry out washing out boric acid water The cleaning process of solution.It is possible thereby to manufacture the resin layer for being adsorbed with dichroism pigment and being orientated, i.e. the film of polarizing film.Each work Well known method can be used in sequence.

Base material film and being uniaxially stretched for resin layer can carry out before dyeing, can also carry out in dyeing, can also be It carries out, can also be uniaxially stretched respectively in these multiple stages in boric acid processing after dyeing.Base material film and resin layer It can be uniaxially stretched along the direction MD (film carry direction), in this case, can be between the different roller of peripheral speed with single shaft Mode stretches, and hot-rolling also can be used and stretched with uniaxial manner.In addition, base material film and resin layer (can be removed along the direction TD with film The vertical direction in fortune direction) it is uniaxially stretched, in this case, so-called tenter frame process can be used.In addition, base material film and tree The stretching of rouge layer can be the dry type stretching stretched in an atmosphere, be also possible in the state for being swollen resin layer with solvent The lower wet tensile stretched.In order to embody the performance of polarizing film, stretching ratio is 4 times or more, preferably 5 times or more, special It You Xuanwei not be 5.5 times or more.The upper limit of stretching ratio is not particularly limited, however considers from viewpoints such as inhibition fractures, preferably 8 Times or less.

The polarizing film produced using the above method can be obtained by the peeling base film after the aftermentioned protective layer of stacking It arrives.According to this method, the further filming of polarizing film can be realized.

For as being orientated dichroism pigment in polymerizable liquid crystal compound and polymerize polymerizable liquid crystal compound Obtained by cured film polarizing film manufacturing method, following method can be enumerated, that is, on base material film coating include polymerism Liquid-crystal compounds and the polarizing film of dichroism pigment, which are formed, uses composition, keeps mesomorphic state constant polymerizable liquid crystal compound Ground polymerize and is allowed to solidify, and forms polarizing film.The polarizing film obtained as described is in the state of base material film of being laminated in, can be with Use the polarizing film with base material film as optical film.Alternatively, base can also will be had across first bonding agents cured layer in folder The polarizing film and liquid crystal layer laminate layers poststack of material film, peeling base film use polarizing film as optical film.

As dichroism pigment, the extinction in the absorbance and short-axis direction on the long axis direction with molecule can be used The pigment of different property is spent, such as preferably there is in the range of 300~700nm the pigment for absorbing very big wavelength (λ max).Make For this dichroism pigment, for example, acridine pigment, oxazines pigment, anthocyanidin, naphthalene pigment, azopigment, anthraquinone Pigment etc., wherein it is preferred that azopigment.As azopigment, monoazo pigment, bisazo pigment, trisazo- color can be enumerated Element, four azopigments, talan azopigment etc., more preferable bisazo pigment, trisazo- pigment.

Polarizing film formation may include the polymerization initiators such as solvent, Photoepolymerizationinitiater initiater, photosensitizer, polymerization inhibitor with composition Deng.For polymerizable liquid crystal compound contained in polarizing film formation composition, dichroism pigment, solvent, polymerization initiator, Well known substance can be used in photosensitizer, polymerization inhibitor etc., and Japanese Unexamined Patent Publication 2017-102479 bulletin, day can be used for example The substance illustrated in this special open 2017-83843 bulletin.In addition, polymerizable liquid crystal compound can be used and aftermentioned conduct The identical chemical combination of compound that the polymerizable liquid crystal compound used to obtain the first liquid crystal layer and the second liquid crystal layer illustrates Object.Method for using polarizing film formation composition to form polarizing film, can also be using the method illustrated in above-mentioned bulletin.

The thickness of polarizing film is preferably 2 μm or more, and more preferably 3 μm or more.In addition, the polarizing film with a thickness of 25 μm Hereinafter, preferably 15 μm hereinafter, more preferably 13 μm hereinafter, further preferably 7 μm or less.It should be noted that above-mentioned Upper limit value and lower limit value can be combined arbitrarily.The thickness of polarizing film is thinner, then rigidity is smaller, is more susceptible to the first liquid crystal Layer, the second liquid crystal layer the influence of shrinkage stress can be with therefore in the case where the polarizing film for using thickness small is as optical film Suitably using the manufacturing method of the optical laminate of above embodiment and the manufacturer of the optical laminate with adhesive layer Method.

(polarization plates)

Polarizing film can be pressed from both sides in its one or both sides and is made partially across well known adhesive layer or bonding layer stackup protective layer Vibration plate.The polarization plates are so-called linear polarization plates.As the protective layer for the one or both sides that can be laminated in polarizing film, such as It is excellent by thermoplastic resin shape that the transparency, mechanical strength, thermal stability, water preventing ability, isotropism, draftability etc. can be used At film.

As the concrete example of this thermoplastic resin, the celluosic resins such as triacetyl cellulose can be enumerated；Gather to benzene two The polyester resin such as formic acid glycol ester, polyethylene naphthalate；Polyethersulfone resin；Polysulfone resin；Polycarbonate resin；Buddhist nun The polyamides such as dragon or aromatic polyamide；Polyimide resin；The polyenes such as polyethylene, polypropylene, ethylene-propylene copolymer Hydrocarbon resin；Cyclic polyolefin resin (also referred to as norbornene resin) with ring system and norbornene structure；(methyl) third Olefin(e) acid resinoid；Polyarylate resin；Polystyrene resin；Polyvinyl alcohol resin and their mixture.The two of polarizing film In the case that surface layer is laminated with protective layer, the resin composition of two protective layers be may be the same or different.Above embodiment The manufacturing method of optical laminate with adhesive layer from the viewpoint of from slimming due to using only in the one side of polarizing film Warp can also be inhibited bent in the case where the polarization plates of protective layer are laminated as optical film, therefore preferred.It should be noted that this " (methyl) acrylic compounds " so-called in specification, refer to any one that can be acrylic compounds or methacrylic.(first Base) " (methyl) " of acrylate etc. be also same meaning.

It is closely sealed with the polarizing film comprising PVA system resin and dichroic substance in order to improve by film that thermoplastic resin is formed Property, it is possible to implement surface treatment (such as sided corona treatment etc.) can also form the thin layers such as prime coat (also referred to as priming coat).

Moisture permeability when 40 DEG C of protective layer preferable temperature, humidity 90%RH is 1~1500g/m²·24hr.If protective layer Moisture permeability is greater than 1500g/m²R for 24 hours, then in hot and humid environment, have be easy to generate polarization plates through when in curling become The case where change.The moisture permeability of protective layer is lower, is more easily obtained the effect that can inhibit the ongoing change of curling of polarization plates.It protects Moisture permeability when 40 DEG C of the temperature of sheath, humidity 90%RH is more preferably 1000g/m²R is hereinafter, further preferably for 24 hours 100g/m²R is hereinafter, be still more preferably 10g/m for 24 hours²R or less for 24 hours.Moisture permeability can be according to JIS Z 0208:1976 It is measured.

It should be noted that preferably by optical laminate or being had in the case where protective layer is laminated in the two sides of polarizing film The moisture permeability and layer of the outside protective layer for being laminated in visible side when the optical laminate of adhesive layer fits in optical display element The moisture permeability for being laminated on the inside protective layer of the first adhesive layer side is mutually the same, or compared with the protective layer of inside outside protective layer one Fang Geng little.When moisture is especially added in the keeping of polarization plates as a result, flat shape can be kept, or can pass through Make inside protective layer swelling and be set as the state for crimping polarization plates to just crimp side, to be easy to make optical laminate or have The optical laminate of adhesive layer is the state crimped to just crimp side.In addition, the moisture permeability of outside protective layer is more preferably 10g/ m²R or less for 24 hours.Even only can also control curling in the polarization plates of the one side stacking matcoveredn of polarizing film as a result, After optical laminate or optical laminate with adhesive layer are fitted in optical display element, can also inhibit through when in Change in size (deformation).

In addition, inhibiting to further decrease the influence of the shrinkage stress of the first liquid crystal layer, the second liquid crystal layer in optical layer The just crimp generated in stack, the optical laminate with adhesive layer preferably improves in the polarization plates used as optical film It is laminated in the rigidity of the protective layer of polarizing film.So-called rigidity herein is the room temperature (23 DEG C) as the film used in protective layer Under tensile modulus of elasticity (hereinafter sometimes referred to simply as " 23 DEG C of elasticity modulus ".) on multiplied by obtained by film thickness be worth define.For example, making With by the protective layer of the cellulose-based polymer represented preferably 23 DEG C of elasticity modulus of triacetyl cellulose as 3000~ The range of 5000MPa has been used using polymethyl methacrylate as preferably 23 DEG C of the protective layer of the acrylic acid series polymeric compounds of representative Elasticity modulus is the range of 2000~4000MPa, has used the cyclic olefine polymer as with norbornene structure The range that protective layer preferably 23 DEG C of elasticity modulus are 2000~4000MPa.On the outside in protective layer, from above-mentioned moisture permeability and rigidity From the viewpoint of can suitably use acrylic acid series polymeric compounds or polyolefin polymer, it is particularly preferably poly- using cyclic olefine Close object.

Protective layer for example can be the resin stretched to thermoplastic resin above-mentioned, be also possible to unstretched Resin (hereinafter sometimes referred to as " non-stretched resin ".).As stretch processing, it can enumerate and be uniaxially stretched, is biaxial stretch-formed etc..

Draw direction in stretch processing can be the length direction of non-stretched resin, be also possible to orthogonal to the longitudinal direction Direction, can also be the direction with length direction oblique.In the case where being uniaxially stretched, as long as any in these directions One direction stretches non-stretched resin.Biaxial stretch-formed two draw directions that can be in these directions simultaneously stretch While it is biaxial stretch-formed, be also possible to after stretching along given direction stretch along another direction gradually biaxial stretch-formed.

Stretch processing for example can be by using the niproll of two pairs or more of the peripheral speed for increasing downstream side along long Degree direction stretch or with chuck hold non-stretched resin two side ends and along direction orthogonal to the longitudinal direction stretch etc. come into Row.At this point, can control desired phase by adjusting the thickness or adjustment stretching ratio of the thermoplastic resin after stretching Difference and wavelength dispersion.

Stretched thermoplastic resin preferably satisfies following formula.

(1)80nm≤Re(590)≤180nm；

(2) 0.5 < Rth (590)/Re (590)≤0.8；

(3) 0.85≤Re (450)/Re (550) < 1.00.

In formula, Re (590), Re (450), Re (550) are respectively indicated in the face at measurement wavelength 590nm, 450nm, 550nm Phase difference value, Rth (590) indicate the thickness direction phase difference value at measurement wavelength 590nm.Phase difference value and thickness in these faces Direction phase difference value refers to the value measured in the environment of 23 DEG C of temperature, relative humidity 55%.

The refractive index of slow-axis direction is set as nx, by the (side orthogonal with slow-axis direction in face of fast axis direction in face in by face To) refractive index be set as ny, the refractive index of thickness direction is set as to nz, the thickness of stretched thermoplastic resin be set as d When, with phase difference value Re, thickness direction phase difference value Rth in following formula (S1), the face formula (S2) Lai Dingyi.

(S1) Re=(nx-ny) × d；

(S2) Rth=[{ (nx+ny)/2 }-nz] × d.

Above-mentioned outside protective layer preferably meets the stretched thermoplastic resin in above-mentioned formula (1)~(3).In addition, Above-mentioned outside protective layer preferably fits in polarizing film in such a way that the direction on edge and the absorption axiss oblique of polarizing film has slow axis, Such as preferably so that the side that the angle of the slow axis of outside protective layer is 45 ± 10 ° or 135 ± 10 ° relative to the absorption axiss of polarizing film Outside protective layer is bonded by formula with polarizing film.By making the angle above range of slow axis, then the phase of the light on fast axis direction It creates a difference between position and the phase of the light on slow-axis direction, if therefore the optical laminate of present embodiment is applied to optics Display element can then make the light circularly polarized light projected across optical laminate.Thus, the optics of present embodiment is laminated The display device that body is applied to optical display element can also become even if whens across polarization sunglasses viewing display image etc. The display image of visual excellence.

The thickness of protective layer is preferably 3 μm or more, and more preferably 5 μm or more.In addition, the thickness of protective layer is preferably 50 μm Hereinafter, more preferably 30 μm or less.It should be noted that above-mentioned upper limit value and lower limit value can be combined arbitrarily.Due to inclined The thickness of vibration plate is thinner, then rigidity it is smaller, be more susceptible to the first liquid crystal layer, the second liquid crystal layer shrinkage stress influence, because This can be suitably laminated using the optics of above embodiment in the case where the polarization plates for using thickness small are as optical film The manufacturing method of the manufacturing method of body and the optical laminate with adhesive layer.

Protective layer can have surface-treated layer with the surface of polarizing film opposite side, for example, can have hard conating, Anti-reflection layer, antiblocking layers, antiglare layer, diffusion layer etc..Surface-treated layer can be the other layer being laminated on protective layer, It can be the layer that surface treatment is implemented to protective layer and is formed.

Hard conating is the layer for the purpose of preventing the damage on polarization plates surface etc., such as can be by the surface of protective layer It is additional to utilize the excellent sides for solidifying envelope such as hardness, the sliding properties of ultraviolet curing resins such as acrylic acid series, silicone-based Formula etc. is formed.Anti-reflection layer is the layer for the purpose of the reflection for preventing the ambient light at polarization plates surface, can pass through to be formed Antireflection film according to previous methods etc. is realized.In addition, antiblocking layers be by prevent with adjoining course it is closely sealed for the purpose of layer.

Antiglare layer is the identification etc. to hinder the transmitted light of polarization plates due to preventing the surface reflection because of ambient light in polarization plates For the purpose of layer, such as can be by based on sandblasting mode, the roughened mode of embossing processing mode or the cooperation of transparent particle The modes such as mode assign minute concave-convex structure to the surface of protective layer and are formed.As in order to protective layer surface assign it is fine Concaveconvex structure and the transparent particle used, for example, average grain diameter be 0.5~50 μm silica, aluminium oxide, two Titanium oxide, zirconium oxide, tin oxide, indium oxide, cadmium oxide, antimony oxide etc. can be conductive inorganic system's particle, crosslinking or The particles such as the organic systems particle such as uncrosslinked polymer.The content of transparent particle forms the layer of minute concave-convex structure relative to production 100 mass parts of resin be generally 2~50 mass parts, preferably 5~25 mass parts.Antiglare layer can also be as spreading partially The transmitted light of vibration plate and the diffusion layer (visual angle expanded functionality etc.) for expanding visual angle etc..

In the case where surface-treated layer is the other layer on the protective layer for being laminated in polarization plates, the thickness of surface-treated layer Preferably 0.5 μm or more, more preferably 1 μm or more of degree.Additionally, it is preferred that for 10 μm hereinafter, more preferably 8 μm or less.If thickness Less than 0.5 μm, then have the tendency that being difficult to be effectively prevented the damage of polarization plate surface.In addition, if thickness be greater than 10 μm, have because Cure shrinkage becomes larger etc. and is difficult to inhibit the phenomenon that the warp of polarization plates is bent.

The manufacturing method of the optical laminate with adhesive layer of above embodiment be suitable for polarization plates with a thickness of 2 μm with Upper and 300 μm or less of situation.The thickness of polarization plates may be 10 μm or more, alternatively, it is also possible to for 150 μm hereinafter, can also Think 120 μm or less, or 80 μm or less.

Polarization plates are prevented using the removing from the polarization plates with protecting film for method measurement recorded in aftermentioned embodiment The actual measurement MD crimp values of polarization plates obtained by cuticula and actual measurement TD crimp values preferably each independently in -40mm or more and 40mm range below is more preferably in -30mm or more and 35mm range below, is further preferably in -20mm or more And 30mm range below.If above-mentioned actual measurement MD crimp values and actual measurement TD crimp values are outside above-mentioned range, polarization plates have easily In the trend for becoming tubular, have the tendency that being difficult to obtain curly form.In addition, if the reality of the aftermentioned polarization plates with protecting film Survey MD crimp values and survey the actual measurement MD crimp values of TD crimp values and polarization plates and actual measurement TD crimp values deviate, then protecting film with The tunnel(l)ing (tunneling) for tilting or appearing in and generate gap between protecting film and polarization plates is generated between polarization plates, because This is not preferred.

(polarization plates with protecting film)

Polarization plates usually fold protecting film in one surface layer, it is possible thereby to which the polarization plates with protecting film are made.Protecting film packet Protecting film adhesive layer containing protecting film resin film and stacking thereon.The thickness of protecting film for example can be 30~200 μm, Preferably 40~150 μm, more preferably 50~120 μm.

As constitute protecting film resin film resin, for example, polyethylene-based resin, polypropylene-based resin it The polyolefin-based resins of class；Cyclic polyolefin hydrocarbon system resin；Polyethylene terephthalate, polyethylene naphthalate etc Polyester based resin；Polycarbonate-based resin；(methyl) acrylic resin etc..Wherein, preferred polyethylene terephthalate The polyester based resins such as ester.Protecting film resin film can be 1 layer of structure, it is possible to have 2 layers or more of multilayered structure.

As the adhesive for constituting protecting film adhesive layer, can be used identical as the adhesive for constituting aftermentioned adhesive layer Adhesive.In addition, protecting film by the coating adhesive composition in protecting film resin film surface and can be dried It is obtained to form adhesive layer.As needed, for the adhesive coated face of protecting film resin film, in order to improve adaptation, Surface treatment (such as sided corona treatment etc.) can be implemented, the thin layers such as prime coat (also referred to as priming coat) can also be formed.In addition, root According to needs, can have for protecting protecting film adhesive layer by coating and protecting film resin film side opposite side The peeling layer on surface.The peeling layer can be removed on the suitable opportunity when being bonded with polarization plates.

In the production process of the polarization plates with protecting film to polarization plates fitting protecting film, it can also be opened by assigning Power is poor, difference, and assigns just crimp along the length direction of the polarization plates with protecting film.Therefore, in above-mentioned embodiment party In the manufacturing method of the optical laminate with adhesive layer of formula, feelings of the polarization plates with protecting film as optical film are being used It, can be with by assigning just crimp to the polarization plates with protecting film in the production process of the polarization plates with protecting film under condition Expect more easily to inhibit the warp of optical laminate, optical laminate with adhesive layer bent.

Polarization plates with protecting film are preferably by the method measurement recorded in aftermentioned embodiment with protecting film The actual measurement MD crimp values and actual measurement TD crimp values of polarization plates are in -40mm or more and 40mm range below each independently, more It is preferably in -30mm or more and 35mm range below, is further preferably in -20mm or more and 30mm range below. If above-mentioned actual measurement MD crimp values and actual measurement TD crimp values are that the polarization plates for having protecting film, which have, to be easy to become outside above-mentioned range The trend of tubular has the tendency that being difficult to obtain curly form.In addition, the polarization plates for having protecting film to be processed as to given ruler It is very little and when fitting in optical display element, it is difficult to be properly maintained, be had in fitting mixed using the aspirating mechanism etc. of laminating apparatus Enter bubble or generate the trend such as fold, therefore not preferably.

Since the thickness of the polarization plates with protecting film is thinner, then rigidity is smaller, is more susceptible to the first liquid crystal layer, second The influence of the shrinkage stress of liquid crystal layer, therefore in the case where the polarization plates for using thickness small are as optical film, it can be suitably The manufacturing method of manufacturing method using the optical laminate of above embodiment and the optical laminate with adhesive layer.Upper State in the case that optical film 60 in embodiment is the polarization plates with protecting film, above embodiment with adhesive layer The manufacturing method of optical laminate is suitable for the polarization plates with protecting film with a thickness of 32 μm or more and 500 μm or less of situation. The thickness of polarization plates with protecting film may be 40 μm or more, alternatively, it is also possible to be 350 μm or less, or 200 μm Below, or 150 μm or less.

(adhesive layer)

Adhesive layer refers to layer made of an adhesive." adhesive " so-called in this specification is soft rubber-like and logical The substance that its own is affixed on the adherends such as optical film, liquid crystal layer and embodies cementability is crossed, is to be referred to as so-called pressure sensitive The substance of bonding agent.In addition, aftermentioned active energy ray curable adhesive can adjust friendship by irradiation energy ray Connection degree, bonding force.

As adhesive, the adhesive that known optical transparence can be used excellent without particular limitation, example Such as can be used with acrylic acid series, carbamate system, silicone-based, polyvingl ether system base polymer adhesive. Alternatively, it is also possible to being active energy ray curable adhesive, hot setting adhesive etc..In them, be suitably for the transparency, Bonding force, releasable (are also referred to as re-workability below.), weatherability, based on the excellent olefin(e) acid system resin such as heat resistance The adhesive of polymer.Adhesive layer is preferably by including (methyl) acrylic resin (1), crosslinking agent (2), silane compound (3) Adhesive composition reaction product constitute, also may include other compositions (4).

((methyl) acrylic resin (1))

(methyl) acrylic resin (1) contained in adhesive composition is preferably from following formula (I) table The structural unit of (methyl) alkyl acrylate shown is (below also referred to as " structural unit (I) ".) as principal component (such as comprising The structural unit of 50 mass % or more.) polymer (below also referred to as " (methyl) acrylate polymer ".).This explanation " from " so-called in book refers to that the compounds such as (methyl) alkyl acrylate make chemical structure change due to polymerization.

[changing 1]

[in formula, R¹⁰Indicate hydrogen atom or methyl, R²⁰Indicate that the alkyl of carbon atom number 1~20, the alkyl can have Straight-chain, branched or any one cricoid structure, the hydrogen atom of the alkyl can use the alkoxy of carbon atom number 1~10 Replace.]

As (methyl) acrylate indicated with formula (I), for example, (methyl) methyl acrylate, (methyl) third Olefin(e) acid ethyl ester, (methyl) n-propyl, (methyl) isopropyl acrylate, (methyl) n-butyl acrylate, (methyl) propylene Sour isobutyl ester, (methyl) acrylic acid n-pentyl ester, (methyl) the just own ester of acrylic acid, (methyl) Isohexyl acrylate, (methyl) propylene Sour positive heptyl ester, (methyl) n-octyl, (methyl) Isooctyl acrylate monomer, (methyl) 2-EHA, (methyl) Acrylic acid is just and different nonyl ester, the positive last of the ten Heavenly stems ester of (methyl) acrylic acid, (methyl) isodecyl acrylate, (methyl) acrylic acid dodecyl Ester, (methyl) cyclohexyl acrylate, (methyl) isobornyl acrylate, (methyl) stearyl acrylate base ester, (methyl) acrylic acid Tert-butyl ester etc..As the concrete example of the alkyl acrylate containing alkoxy, (methyl) acrylic acid 2- methoxyl group second can be enumerated Ester, (methyl) ethioxy methyl esters etc..Wherein preferably comprise (methyl) n-butyl acrylate or (methyl) acrylic acid 2- second The own ester of base particularly preferably includes (methyl) n-butyl acrylate.

(methyl) acrylate polymer may include the composition list of the other monomers other than structural unit (I) Member.It can be a kind from the structural unit of other monomers, be also possible to two or more.As (methyl) acrylate polymer The other monomers that can include can enumerate the monomer with polar functional group, the monomer with aromatic group, acrylamide It is monomer.

As the monomer with polar functional group, (methyl) acrylate with polar functional group can be enumerated.As Polar functional group can enumerate hydroxyl, carboxyl, substituted-amino, unsubstituted amino etc..As polar functional group, can also enumerate Heterocycles such as epoxy group etc..

The content phase of the structural unit from the monomer with polar functional group in (methyl) acrylate polymer 100 mass parts of entire infrastructure unit for (methyl) acrylate polymer are preferably 20 below the mass more preferably 0.1 More than mass parts and 20 below the mass, more than further preferably 0.1 mass parts and 10 below the mass, particularly preferably More than 0.5 mass parts and 10 below the mass.

As the monomer with aromatic group, can enumerate in the molecule have 1 (methyl) acryloyl group and 1 with On aromatic rings (such as phenyl ring, naphthalene nucleus etc.), with phenyl, Phenoxyethyl or benzyl (methyl) acrylate.

The content phase of the structural unit from the monomer with aromatic group in (methyl) acrylate polymer 100 mass parts of entire infrastructure unit for (methyl) acrylate polymer are preferably 50 below the mass more preferably 4 matter Part or more and 50 below the mass is measured, more than further preferably 4 mass parts and 25 below the mass.

As acrylamide monomer, N- (methoxy) acrylamide, N- (ethoxyl methyl) third can be enumerated Acrylamide, N- (propoxy methyl) acrylamide, N- (butoxymethyl) acrylamide, N- (2- methyl propoxy methyl) Acrylamide etc..By the inclusion of these structural units, the exudation of the additives such as aftermentioned anti-static electricity interference agent can be inhibited.

In addition, may include as the structural unit from other monomers other than structural unit (I) from benzene second The structural unit of alkene monomer, from vinyl monomer structural unit, from the molecule have multiple (methyl) The structural unit etc. of the monomer of acryloyl group.

The weight average molecular weight (hereinafter also referred to as " Mw " of (methyl) acrylic resin (1).) it is preferably 500,000~250 Ten thousand.If weight average molecular weight is 500,000 or more, the durability of the adhesive layer in the environment of high temperature, high humidity can be improved.If weight is equal Molecular weight is 2,500,000 hereinafter, operability when being then coated with the coating fluid containing adhesive composition becomes good.With Weight-average molecular Measure (Mw) and number-average molecular weight (hereinafter also referred to as " Mn ".) ratio indicate molecular weight distribution (Mw/Mn) be usually 2~10. " weight average molecular weight " so-called in this specification and " number-average molecular weight " are the polyphenyl using the measurement of gel permeation chromatography (GPC) method Ethylene scaled value.

When making (methyl) acrylic resin (1) be dissolved in ethyl acetate and the solution of 20 mass % of concentration is made, Viscosity at 25 DEG C is preferably 20Pas hereinafter, more preferably 0.1~15Pas.(if methyl) acrylic resin (1) Viscosity at 25 DEG C is then to facilitate re-workability etc. in above range.Above-mentioned viscosity can use Brookfield viscometer measurement.

From the viewpoint of taking into account adhesiveness and durability, the glass transition temperature of (methyl) acrylic resin (1) Preferably -10 DEG C~-60 DEG C of degree.It should be noted that glass transition temperature can use differential scanning calorimetry (DSC) (DSC) Measurement.

(methyl) acrylic resin (1) may include (methyl) acrylate polymer of more than two kinds.As this (methyl) acrylate polymer, for example, using the structural unit (I) from (methyl) acrylate as Principal component and weight average molecular weight are in lower (methyl) acrylate polymer of molecular weight of 50,000~300,000 range.

(crosslinking agent (2))

The adhesive composition for forming adhesive layer preferably comprises crosslinking agent (2).As crosslinking agent (2), can enumerate usual Crosslinking agent (such as isocyanate compound, epoxide, aziridine cpd, meal chelate compounds, peroxide Deng), especially consider from viewpoints such as the up time of adhesive composition, crosslinking rates, preferably isocyanates system chemical combination Object.

As isocyanates based compound, preferably in the molecule with the chemical combination of at least two isocyanate group (- NCO) Object, for example, aliphatic isocyanates based compound (such as hexamethylene diisocyanate etc.), alicyclic isocyanic acid Ester based compound (such as isophorone diisocyanate), hydrogenation benzene dimethylene diisocyanate, hydrogenated diphenyl methane two Isocyanates, aromatic isocyanate based compound (such as toluene di-isocyanate(TDI), benzene dimethylene diisocyanate, hexichol Dicyclohexylmethane diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate etc.) etc..In addition, crosslinking agent (2) can also be with It is that the addition product (adduct) using polyol compound of above-mentioned isocyanate compound [such as utilizes glycerine, three hydroxyl first The addition product of base propane etc.], isocyanuric acid carboxylate, biuret form compound, with polyether polyol, polyester polyol, propylene Carbamate prepolymer type obtained by the addition reactions such as sour polyalcohol, polybutadiene polyol, polyisoprene polyol The derivatives such as isocyanate compound.Crosslinking agent (2) can be used alone or two or more is applied in combination.In them, from resistance to From the viewpoint of long property, preferably toluene di-isocyanate(TDI), benzene dimethylene diisocyanate, hexamethylene diisocyanate and it Polyol compound or their isocyanurate compound.

The ratio of crosslinking agent (2) for example can be 0.01~10 relative to (1) 100 mass parts of (methyl) acrylic resin Mass parts, preferably 0.1~3 mass parts, more preferably 0.1~1 mass parts.If above-mentioned upper limit value hereinafter, being then conducive to The raising of durability then inhibits the generation of gas more than above-mentioned lower limit value, is conducive to the raising of re-workability.

(silane compound (3))

Adhesive composition contains silane compound (3).By contain silane compound (3), can be improved adhesive layer with The adaptation for the layer being stacked.Also silane compound of more than two kinds (3) can be used.

As silane compound (3), for example, vinyltrimethoxysilane, vinyltriethoxysilane, Vinyl three (2- methoxy ethoxy) silane, 3- glycidoxypropyltrime,hoxysilane, 3- glycidoxypropyl group Triethoxysilane, 3- epoxy propoxy propyl methyl dimethoxysilane, 3- glycidoxypropyl group ethyoxyl dimethyl Silane, 2- (3,4- epoxycyclohexyl) ethyl trimethoxy silane, 3- chloropropylmethyldimethoxysilane, 3- chloropropyl Trimethoxy silane, 3- methacryloxypropyl trimethoxy silane, 3-mercaptopropyi trimethoxy silane etc..

In addition, silane compound (3) may include the oligomer from above-mentioned silane compound (3).

The content of silane compound (3) in adhesive composition is relative to (1) 100 mass of (methyl) acrylic resin Part be usually 0.01~10 mass parts, preferably 0.03~5 mass parts, more preferably 0.05~2 mass parts, further preferably 0.1~1 mass parts.If the content of silane compound (3) is 0.01 mass parts or more, be easy to improve adhesive layer and optical film, The adaptation of the adherends such as liquid crystal layer.If content below the mass, can inhibit silane compound (3) from adhesive layer for 10 Exudation.

(other compositions (4))

It is formed in the adhesive composition of adhesive layer, as other compositions (4), may include and used ionic compound Deng anti-static electricity interference agent, solvent, crosslinking catalyst, tackifying resin (tackifier), plasticizer, weathering stabilizers, softening agent, dye The additives such as the resin other than material, pigment, inorganic filler, acrylic resin it is independent one kind or two or more.

(active energy ray curable adhesive)

Cooperate the ultra-violet solidified compounds such as polyfunctional acrylate in adhesive composition, forms adhesive layer It irradiates ultraviolet light afterwards and is allowed to solidify, harder adhesive layer is made, this is also useful way, and active energy beam can be used Curing adhesive." active energy ray curable adhesive " has because of the photograph by ultraviolet light, electron beam homenergic ray It penetrates and cured property.Active energy ray curable adhesive is the adhesive with following property, that is, due to penetrating in energy Also there is adhesiveness, therefore can be closely sealed with the adherends such as optical film, liquid crystal layer before line irradiation, and can be penetrated by irradiation energy Line solidifies so as to adjust closing force.

Active energy ray curable adhesive generally comprises acrylic adhesive and energy-ray polymerizable compound As principal component.It is also usually combined with crosslinking agent, Photoepolymerizationinitiater initiater, photosensitizer etc. can also be cooperated according further to needs.

Adhesive layer preferably its storage modulus is 0.10~10.0MPa, more preferably 0.15~5.0MPa at 23 DEG C.If 23 DEG C when storage modulus be 0.10MPa or more, then the not good situations such as can inhibit to remove when generating temperature change, therefore it is excellent Choosing.In addition, if 10.0MPa hereinafter, be then difficult to happen the reduction of the durability as caused by the reduction of bonding force, therefore preferably. It should be noted that the storage modulus of adhesive layer can use commercially available determination of viscoelasticity device, such as REOMETRIC corporation Determination of viscoelasticity device " DYNAMIC ANALYZER RDAII " measure.

The thickness of adhesive layer is preferably 3 μm or more, and more preferably 5 μm or more.In addition, the thickness of adhesive layer is preferably 40 μm Hereinafter, more preferably 30 μm or less.It should be noted that above-mentioned upper limit value and lower limit value can be combined arbitrarily.

(bonding agent cured layer)

They (are referred to as " bonding agent solidification by first bonding agents cured layer and second bonding agents cured layer together sometimes below Layer ".) refer to layer by being solidified to form the curability composition in adhesive composite.It is solid as bonding agent is used to form The adhesive composite for changing layer, is the bonding agent other than pressure sensitive bonding agent (adhesive), for example, water system bonding agent, Active energy ray-curable bonding agent.As water system bonding agent, for example, dissolving or dividing polyvinyl alcohol resin Dissipate the bonding agent of Yu Shuizhong.As active energy ray-curable bonding agent, for example, comprising passing through ultraviolet light, visible The irradiation of the active energy beam of light, electron beam, X-ray etc and the active energy of the no-solvent type of cured curability compound Measure ray-curable bonding agent.By using the active energy ray-curable bonding agent of no-solvent type, interlayer can be improved Adaptation.It is different, if in active energy ray-curable bonding agent including solvent (especially organic solvent), even if Curability composition contained in bonding agent is identical, can not also obtain enough adaptations, is given cutting optical laminate Size when, it is prone to its end removing etc. not good situations.In addition, due to the additional process by solvent seasoning, by To additional shrinkage stress as caused by heat, it is possible to be easy to produce in optical laminate, the optical laminate with adhesive layer Raw warp is bent.

In the work for having used the no-solvent type comprising the cured curability compound of irradiation by active energy beam Property energy ray-curable bonding agent in the case where, as indicate solidify after active energy ray-curable bonding agent it is hard Multiplied by the rigidity for the water system bonding agent being rigidly frequently above obtained by thickness after solidifying in the storage modulus of the index of degree.If being set to The rigidity of bonding agent cured layer between first liquid crystal layer and the second liquid crystal layer is high, then contraction when can prevent from being removed by substrate Aggravation is crimped caused by stress, therefore it is preferable to use active energy ray-curable bonding agents.

As active energy ray-curable bonding agent, due to showing good cementability, preferably comprise sun from The either or both of the curability compound of sub- polymerism, free-radical polymerised curability compound.Active-energy is penetrated Line curability bonding agent can also comprising for cause the curing reaction of above-mentioned curability compound cationic polymerization initiators, Or radical polymerization initiator.

As the curability compound of cationically polymerizable, for example, epoxy compound (has 1 in the molecule A or 2 or more epoxy groups compound), oxetanes based compound is (in the molecule with 1 or 2 or more oxygen The compound of azetidine ring) or their combination.

As free-radical polymerised curability compound, for example, (methyl) acrylic compounds (are dividing With the compound of 1 or 2 or more (methyl) acryloxy in sub), other with free-radical polymerised double bond Vinyl compound or their combination.

Active energy ray curable bonding agent can contain sensitizer as needed.By using sensitizer, reactivity It improves, can be further improved mechanical strength, the adhesive strength of adhesive layer.As sensitizer, can be suitably used well known Sensitizer.In the case where cooperating sensitizer, total amount 100 matter of the use level relative to active energy ray curable bonding agent Amount part is preferably set to the range of 0.1~20 mass parts.

Active energy ray-curable bonding agent can contain ion trap agent, antioxidant, chain-transferring agent, increasing as needed Stick, thermoplastic resin, filler, flow modifier, plasticizer, defoaming agent, anti-static electricity interference agent, levelling agent, solvent etc. add Add agent.

It can be by the way that adhesive composite to be coated on to the first liquid crystal layer with substrate layer, the second liquid with substrate layer The joint surface of crystal layer and form adhesive composite layer.As coating method, using having used die slot coating machine, comma type scraper Coating machine, reverse roll coater, engraved roll coater, rod coater, wire rod coating, dip coated machine, scraper plate coating machine, Kohler coater Deng common coating technique.

For having used drying means when water system bonding agent to be not particularly limited, such as can be using using heated-air drying The method that machine, infrared drier are dried.

In the case where having used active energy ray-curable bonding agent, ultraviolet light, visible light, electronics can be irradiated The active energy beam of beam, X-ray etc makes adhesive composite layer be solidified to form bonding agent cured layer.As active energy Ray, preferably ultraviolet light are measured, as light source at this time, Cooper-Hewitt lamp can be used, middle medium pressure mercury lamp, high-pressure mercury-vapor lamp, surpass High-pressure mercury-vapor lamp, chemical lamp, black light lamp, microwave-excitation mercury vapor lamp, metal halide lamp etc..

In the case where making the cured situation of adhesive composite layer using ultraviolet light irradiation, the photo-irradiation intensity of ultraviolet light will be according to The composition of adhesive composite determines, is not particularly limited, however preferably 10~1000mW/cm², more preferably 100~ 600mW/cm².If the photo-irradiation intensity to resin combination is less than 10mW/cm², then the reaction time is too long, if more than 1000mW/ cm², then because of the polymerization of heat and adhesive composite from radiation of light source when fever, it is possible in resulting bonding agent cured layer Middle generation xanthochromia.In addition, it is also possible to bigger shrinkage stress is generated due to the heat from radiation of light source.Exposure intensity is for poly- Close initiator, preferably for the intensity in the effective wavelength region of activation of light cationic polymerization initiator, more preferably wavelength Intensity in 400nm wavelength region below, the further preferably intensity in the wavelength region of 280~320nm of wavelength.It is preferred that With the irradiation of this photo-irradiation intensity 1 time or multiple, so that its accumulated light is 10mJ/cm²It above, is preferably 100~1000mJ/ cm², more preferably 200~600mJ/cm²Mode set.If the accumulated light to adhesive composite layer is less than 10mJ/cm², Then the generation from the reactive species of polymerization initiator is not enough, and the solidification of adhesive composite layer is not enough.If accumulation Light quantity is greater than 1000mJ/cm², then irradiation time becomes very long, is unfavorable for improving productivity.In addition, it is also possible to because from light The heat of source radiation and generate bigger shrinkage stress.According to first base material layer, the second substrate layer, the first liquid crystal layer, the second liquid crystal Type, the combination of ingredient in adhesive composite etc. of layer etc., wavelength (UVA (320~390nm), UVB when light irradiates (280~320nm) etc.) it is different, it is necessary to wavelength of accumulated light when also being irradiated according to light and change.

As the viscosity of active energy ray curable bonding agent, as long as can use arbitrary coating method coating Mode selects, however viscosity at 25 DEG C of temperature is preferably in the range of 10~1000mPasec, is more preferably in 20 The range of~500mPasec.If viscosity is too small, has the tendency that the bonding agent cured layer for being difficult to be formed desired thickness. On the other hand, if viscosity is too big, active energy ray curable bonding agent is difficult to flow when being coated with, and is difficult to obtain without not The trend of equal uniform coating.Viscosity described herein be by the bonding agent temperature adjustment be 25 DEG C after using E type viscosimeter with The value of 10rps measurement.

Storage modulus when for 30 DEG C of temperature of bonding agent cured layer, from the durabilities of the polarization plates as optical film, From the viewpoint of inhibiting warp bent, preferably 100MPa or more, more preferably 1000MPa or more, further preferably 1500MPa More than, particularly preferably 2000MPa or more.On the other hand, if the storage modulus of bonding agent cured layer is too big, bonding agent solidification Layer is really up to the mark, the processability meeting when carrying out the punch press process etc. of the size for keeping the optical laminate with adhesive layer given It reduces.Therefore, 30 DEG C of the temperature of bonding agent cured layer when storage modulus be preferably 10000MPa hereinafter, more preferably 8000MPa is hereinafter, further preferably 5000MPa or less.

Storage modulus at 30 DEG C of the temperature of bonding agent cured layer can use following step and calculate.At 50 μm of thickness The one side of cyclic polyolefin resin film is coated with above-mentioned active-energy using coating machine (bar coater, first physical and chemical (strain) are made) 50 μm of thickness of cyclic polyolefin resin film is laminated in the coated face in ray-curable bonding agent again.Then, FUSION is utilized " the D fluorescent tube " of UVSYSTEMS corporation, so that accumulated light is 1500mJ/cm²(UVB) mode irradiates ultraviolet light, makes to be bonded The solidification of agent composition layer.The size for 5mm × 30mm is cut, the cyclic polyolefin resin film of a side is removed, obtains band There is the bonding agent cured layer of resin film.By the bonding agent cured layer with resin film in the way of making its long side direction of draw Held with the measurement of dynamic viscoelasticity device " DVA-220 " that IT measures control (strain) system with the grip separation of 2cm, will drawing with The frequency of contraction, which is set as 10Hz, will heat up speed is set as 10 DEG C/min and heats up, energy storage when finding out 30 DEG C of temperature Modulus.

The thickness of bonding agent cured layer be preferably 10 μm hereinafter, more preferably 5 μm hereinafter, further preferably 2 μm or less. Additionally, it is preferred that be 0.1 μm or more, more preferably 0.5 μm or more, further preferably 1 μm or more.By making bonding agent cured layer With a thickness of lower limit value more than, rigidly get higher, can be improved optical laminate, the optical laminate with adhesive layer curling suppression Effect processed.On the other hand, by the way that the thickness of bonding agent cured layer to be set as within upper limit value, being mixed into etc. for bubble can be prevented to apply Cloth is bad.

(adhesive layer with peeling layer)

Adhesive layer with peeling layer can for example pass through the coating adhesive composition in the demoulding process face of peeling layer And it is dry etc. and form adhesive layer to obtain.Adhesive layer with peeling layer also can have as needed for by coat come Protect other peeling layers with the surface of peeling layer side opposite side of adhesive layer.Peeling layer and other peeling layers can be appropriate Opportunity removing.

(peeling layer)

Peeling layer can be removed relative to adhesive layer, and had and supported the adhesive layer being formed on peeling layer, protection bonding The function of layer.Well known stripping film, peeling paper can be used in peeling layer, such as can be and be used as substrate layer to exemplify to aftermentioned By the film that resin material is formed implement the demouldings such as silicone coated processing layer.For other peeling layers, also can be used with The identical material of peeling layer.

Peeling layer can be removed relative to adhesive layer, and the size of the peeling force between peeling layer and adhesive layer needs to consider The sequence of peeling layer removing is determined.For above-mentioned peeling force, the measurement on peeling layer with adhesive layer can be prepared and used Test film (size of length 200mm, width 25mm), fits in appropriately sized glass, uses the omnipotent examination of Shimadzu Seisakusho Ltd.'s system Machine (AGS-50NX) is tested, the peeling layer being partially stripped in a manner of forming stripping starting point and glass are clamped respectively, with 300mm/ minutes speed removes peeling layer along 180 ° of direction, and the peel strength determined at this time is set as peeling force. Peeling force between peeling layer and adhesive layer is preferably 0.01~0.20N/25mm, more preferably 0.02~0.10N/25mm, into One step is preferably 0.02~0.06N/25mm.If being lower than 0.01N/25mm, it is possible in the way of carrying in peeling layer and is glued It closes and generates tilting between layer.In addition, then the adaptation of peeling layer and adhesive layer is high if more than 0.20N/25mm, peeling layer becomes It is difficult to remove from adhesive layer, fault rupture is bonded when it is therefore possible to become to remove peeling layer, it is attached on the peeling layer removed Have adhesive layer a part state, or generate intention except layer between removing (such as adhesive layer and peeling layer Removing between the layer and adhesive layer of opposite side engagement).

(liquid crystal layer)

The two (is referred to as " liquid crystal layer " sometimes below by the first liquid crystal layer and the second liquid crystal layer together.) it is by making polymerism The cured layer of liquid-crystal compounds polymerization and formation, can be phase separation layer.The optical characteristics of liquid crystal layer can use polymerism liquid The state of orientation of brilliant compound is adjusted.

In this specification, feelings that the optical axis of polymerizable liquid crystal compound is horizontally oriented for substrate layer plane The case where condition is defined as being horizontally oriented, and the optical axis of polymerizable liquid crystal compound is vertically oriented for substrate layer plane It is defined as vertical orientation.So-called optical axis refers to, in the indicatrix formed due to the orientation because of polymerizable liquid crystal compound, The section cut out on direction orthogonal with the optical axis is the direction of circle, i.e., the equal direction of the refractive index in 2 directions.

As polymerizable liquid crystal compound, rodlike polymerizable liquid crystal compound, discoid polymerism liquid can be enumerated Brilliant compound.The situation of horizontal alignment or vertical orientation is carried out for substrate layer in rodlike polymerizable liquid crystal compound Under, the optical axis of the polymerizable liquid crystal compound and the long axis direction of the polymerizable liquid crystal compound are consistent.In discoid polymerization In the case that property liquid-crystal compounds is orientated, the optical axis of the polymerizable liquid crystal compound is present in and the polymerizable liquid crystal chemical combination The orthogonal direction of the disc face of object.

In order to make the liquid crystal layer formed and polymerizeing polymerizable liquid crystal compound embody interior phase difference of appearing, as long as making Polymerizable liquid crystal compound is orientated along direction appropriate.In the case where polymerizable liquid crystal compound is rodlike, by making The optical axis of the polymerizable liquid crystal compound is horizontally oriented to embody interior phase difference of appearing for substrate layer plane, the feelings Under condition, optical axis direction is consistent with slow-axis direction.In the case where polymerizable liquid crystal compound is discoid, by making the polymerism The optical axis of liquid-crystal compounds is horizontally oriented to embody interior phase difference of appearing for substrate layer plane, in this case, light Axis is orthogonal with slow axis.The state of orientation of polymerizable liquid crystal compound can use the combination of alignment films and polymerizable liquid crystal compound To adjust.

Polymerizable liquid crystal compound is that have polymerizable group and the compound with liquid crystal liquid crystal property.So-called polymerism base Group refers to the group for participating in polymerization reaction, preferably polymerism group.Herein, so-called polymerism group, be refer to because Living radical, acid for being generated from aftermentioned Photoepolymerizationinitiater initiater etc. and the group for participating in polymerization reaction.As polymerism base Group, can enumerate vinyl, ethyleneoxy, 1- chlorovinyl, isopropenyl, 4- ethenylphenyl, acryloxy, methyl Acryloxy, epoxy ethyl, oxetanyl etc..Wherein, preferably acryloxy, methacryloxy, ethylene oxy Base, epoxy ethyl and oxetanyl, more preferable acryloxy.Liquid crystal liquid crystal property possessed by polymerizable liquid crystal compound can be with It is thermotropic liquid crystal, is also possible to lysotropic liquid crystal, if thermotropic liquid crystal is classified with the degree of order, can be nematic crystal, it can also To be smectic crystal.

As rodlike polymerizable liquid crystal compound, discoid polymerizable liquid crystal compound, well knownization can be used Object is closed, Japanese Unexamined Patent Publication 2015-163937 bulletin, Japanese Unexamined Patent Publication 2016-42185 bulletin, international public affairs can be used for example The compound opening No. 2016/158940, illustrating in Japanese Unexamined Patent Publication 2016-224128 bulletin.

Liquid crystal layer can be 1 layer of structure, be also possible to 2 layers or more of multilayered structure.In the multilayered structure with 2 layers or more In the case where, when the liquid crystal layer with substrate layer stated after preparation, as long as forming 2 layers or more of multilayered structure on substrate layer Liquid crystal layer.In the case where liquid crystal layer is 1 layer of structure, the thickness of liquid crystal layer is preferably 0.3 μm or more, or 1 μ M or more, usually 10 μm hereinafter, preferably 5 μm or less.In the case where liquid crystal layer is 2 layers or more of multilayered structure, liquid crystal layer Thickness be preferably 0.5 μm or more, or 1 μm or more, usually 10 μm hereinafter, preferably 5 μm or less.It is inclined from facilitating The slimming of vibration plate entirety, effectively inhibit issuable warp it is bent from the viewpoint of, the thickness of liquid crystal layer be preferably 5 μm with Under.In addition, having the tendency that the degree of warp song is slight in the case where the thickness of liquid crystal layer is less than 0.3 μm, therefore using above-mentioned The manufacturing method of the optical laminate of embodiment, the necessity of the manufacturing method of optical laminate with adhesive layer are small.

(liquid crystal layer with substrate layer)

The two (is referred to as by the first liquid crystal layer with substrate layer and the second liquid crystal layer with substrate layer together sometimes below " liquid crystal layer with substrate layer ".) can be by operating acquisition as follows, that is, on substrate layer, coating includes polymerizable liquid crystal The liquid crystal layer formation composition of object and drying are closed, is formed as the solidification formed and polymerizeing polymerizable liquid crystal compound The liquid crystal layer of layer.In the case where being formed with aftermentioned oriented layer on substrate layer, liquid crystal layer formation is coated on composition and is taken To on layer, in the case where liquid crystal layer is 2 layers or more of multilayered structure, by the liquid crystal layer shape for being successively coated with different compositions Multilayered structure is formed at composition etc..

Liquid crystal layer formation composition usually also includes solvent other than comprising polymerizable liquid crystal compound.Liquid crystal layer Formation composition can also include polymerization initiator, reactive additive, polymerization inhibitor etc..For solvent, polymerization initiator, anti- Japanese Unexamined Patent Publication 2015-163937 bulletin, Japanese Unexamined Patent Publication No. 2016-42185 number can be used in answering property additive, polymerization inhibitor etc. Bulletin, International Publication No. 2016/158940, the substance illustrated in Japanese Unexamined Patent Publication 2016-224128 bulletin.

The coating of liquid crystal layer formation composition for example can use spin-coating method, extrusion molding, gravure coating process, die coating method, Method well known to print processes such as the rubbing methods such as die slot rubbing method, stick coating method, spreader method, soft version method etc. carries out.Carrying out liquid After crystal layer forms the coating with composition, under conditions of preferably the polymerizable liquid crystal compound contained in coating layer will not polymerize Remove solvent.As drying means, natural seasoning, aeration-drying method, heat drying, hypobaric drying method etc. can be enumerated.

The polymerization of the polymerizable liquid crystal compound carried out after the drying of coating layer, which can use, to be made with polymerizable functional group The well known method of compound polymerization carry out.As polymerization, for example, thermal polymerization, photopolymerization etc., from poly- It is preferably photopolymerization from the viewpoint of the easness of conjunction.In the case where polymerizeing polymerizable liquid crystal compound using photopolymerization, It is preferable to use the compositions for containing Photoepolymerizationinitiater initiater as liquid crystal layer formation composition, is coated with the liquid crystal layer and is formed with combination Object and drying make polymerizable liquid crystal compound contained in the dry coationg after drying carry out liquid crystal aligning, maintain liquid crystal aligning State unchangeably carries out photopolymerization.

Photopolymerization can be by irradiating activity to the polymerizable liquid crystal compound for having carried out liquid crystal aligning in dry coationg Energy-ray carries out.As the active energy beam irradiated, can be polymerize according to possessed by polymerizable liquid crystal compound Property group type and its amount, the type of Photoepolymerizationinitiater initiater etc. properly select, for example, selected from visible light, ultraviolet The active energy beam of one or more of line, laser, X-ray, alpha ray, β ray and gamma-rays.Wherein, from easily controllable poly- It is preferably purple from the aspect of closing the progress of reaction, the device being widely used in the field can be used as photo-polymerization device Outside line, preferably by can be in such a way that ultraviolet light carries out photopolymerization, selective polymerization liquid-crystal compounds, Photoepolymerizationinitiater initiater Type.It, can also be by irradiating active energy while using cooling body appropriate that dry coationg is cooling in photopolymerization Ray is measured, to control polymerization temperature.

(substrate layer)

The two (is referred to as " substrate layer " sometimes below by first base material layer and the second substrate layer together.) have as support shape At in the branch of aftermentioned first alignment layer and second orientation layer and the first liquid crystal layer and the second liquid crystal layer on these substrate layers Support the function of layer.Substrate layer is preferably the film formed by resin material.

As resin material, the excellent resin such as the transparency, mechanical strength, thermal stability, draftability can be used for example Material.Specifically, the polyolefin-based resins such as polyethylene, polypropylene can be enumerated；The cyclic polyolefins such as norbornene-based polymer Hydrocarbon system resin；The polyester based resins such as polyethylene terephthalate, polyethylene naphthalate；(methyl) acrylic acid gathers (methyl) methyl acrylate etc. (methyl) acrylic resin；Triacetyl cellulose, diacetyl cellulose, cellulose ethanoate third The cellulose esters such as acid esters system resin；The vinyl alcohol resins such as polyvinyl alcohol, polyvinyl acetate；Polycarbonate-based resin；Polyphenyl Vinylite；Polyarylate system resin；Polysulfones system resin；Polyether sulfone system resin；Polyamide resin；Polyimides system resins； Polyether-ketone system resin；Polyphenylene sulfide system resin；Polyphony Ether resin；And their mixture, copolymer etc..These resins are worked as In, it is preferable to use cyclic polyolefin hydrocarbon system resin, polyester based resin, cellulose esters system resin and (methyl) acrylic resin are appointed One kind of anticipating or their mixture.

Substrate layer can be a kind of resin or mix the single layer of two or more resin, it is possible to have 2 layers or more of multilayer knot Structure.In situation with multi-layer structure, the resin for making each layer can be the same or different each other, be also possible to hard conating Etc coating/solidified material layer.

In the resin material for the film that production is formed by resin material, optional additive can be added.As additive, For example, ultraviolet absorbing agent, antioxidant, lubricant, plasticizer, release agent, anti-coloring agent, fire retardant, nucleating agent, Anti-static electricity interference agent, pigment and colorant etc..

The thickness of first base material layer and the second substrate layer is not particularly limited, however generally from operations such as intensity, disposition property From the aspect of property, preferably 1~300 μm, more preferably 10~200 μm, further preferably 30~120 μm.

In the case where the first liquid crystal layer with substrate layer has aftermentioned first alignment layer, or the with substrate layer Two liquid crystal layers have aftermentioned second orientation layer in the case where, in order to improve first base material layer and first alignment layer adaptation, And second substrate layer and second orientation layer adaptation, can formation first alignment layer at least to first base material layer side Surface and surface at least to the side of the formation second orientation layer of the second substrate layer, carry out sided corona treatment, plasma Processing, flame treatment etc. can also form prime coat etc..

Substrate layer can be removed relative to liquid crystal layer or aftermentioned oriented layer (first alignment layer or second orientation layer), substrate The size of layer and the peeling force between liquid crystal layer or oriented layer needs to consider the sequence of peeling base layer to determine.Peeling force in addition to Using the test film of the measurement on substrate layer with liquid crystal layer or use the survey on substrate layer with oriented layer and liquid crystal layer Determine to be measured identically as the method for peeling force between measurement peeling layer and adhesive layer with other than test film.Substrate layer with Peeling force between liquid crystal layer or oriented layer is preferably 0.01~0.50N/25mm, more preferably 0.03~0.20N/25mm, into One step is preferably 0.05~0.18N/25mm.If peeling force is lower than above-mentioned lower limit value, it is likely that in base in the way of carrying Tilting is generated between material layer and liquid crystal layer or oriented layer.In addition, if peeling force is greater than above-mentioned upper limit value, due to adaptation mistake Height is being made it is therefore possible to transfer liquid crystal layer or liquid crystal layer and liquid crystal layer from oriented layer to another party, optical film etc. It makes and is possible to the removing interface in the way for carrying each component in the process of optical laminate, optical laminate with adhesive layer and sends out Raw change etc..

Peeling force (hereinafter sometimes referred to as " between first base material layer and the first liquid crystal layer or aftermentioned first alignment layer One peeling force ".) and the second substrate layer and the second liquid crystal layer or aftermentioned second orientation layer between peeling force (following sometimes referred to as Make " the second peeling force ".) difference be preferably 0.01N/25mm or more, more preferably 0.03N/25mm or more.From with substrate In the case that the liquid crystal layer laminates of layer first remove first base material layer, preferably the second peeling force is greater than the first peeling force, from band In the case where having the liquid crystal layer laminates of substrate layer first to remove the second substrate layer, preferably the first peeling force is greater than the second peeling force. In addition, in the case where first removing first base material layer from the liquid crystal layer laminates with substrate layer, from the viewpoint of long dimensioned Consider preferably there is the pass of peeling force < the first peeling force the second peeling force of < between the second peeling layer and the second adhesive layer System.

(oriented layer)

The first liquid crystal layer with substrate layer can include first alignment layer between first base material layer and the first liquid crystal layer. In addition, the second liquid crystal layer with substrate layer can include second orientation layer between the second substrate layer and the second liquid crystal layer.

First alignment layer and second orientation layer have the first liquid crystal layer and the second liquid crystal for making to be formed in these oriented layer Liquid-crystal compounds contained in layer carries out the orientation restraint of liquid crystal aligning along desired direction.As first alignment layer and Two oriented layer can enumerate the orientation polymeric layer formed by orientation polymer, be taken by the light that light orientation polymer is formed Tropism polymeric layer, the groove orientation layer in layer surface with relief pattern or multiple grooves (groove), first alignment layer with Second orientation layer can be the layer of identical type, be also possible to different types of layer.The thickness of first alignment layer and second orientation layer Degree is usually 10~4000nm, preferably 50~3000nm.

Orientation polymeric layer can be formed, that is, orientation polymer is dissolved in solvent, by resulting combination Object is coated on substrate layer (first base material layer or the second substrate layer) and removes solvent afterwards, carries out friction treatment as needed.The situation Under, in the orientation polymeric layer formed by orientation polymer, it can use surface state, the friction of orientation polymer Condition carrys out arbitrarily direction of adjustment restraint.

Light orientation polymeric layer can be by that will include polymer with photoreactive group or monomer and solvent Composition is coated on substrate layer (first base material layer or the second substrate layer) and irradiates the light such as ultraviolet light and formed.Especially on edge When horizontal direction embodies orientation restraint, it can be formed by irradiation polarised light.In this case, poly- in light orientation It closes in nitride layer, can use and arbitrarily direction of adjustment restraint is come to the polarizing light irradiation condition etc. of light orientation polymer.

Groove orientation layer can use following method etc. for example to be formed, that is, press from both sides in photosensitive polyimide film surface The method be exposed, develop across the exposure mask of the slit with pattern form etc. and forming relief pattern；On surface Have on the former disk of slotted plate, forms the uncured layer of active energy ray-curable resin, which is transferred to substrate Layer (first base material layer or the second substrate layer) and cured method；It is formed and is lived at substrate layer (first base material layer or the second substrate layer) Property energy ray-curable resin uncured layer, formed by connecing etc. the former disk for having indent and convex roll to the lamination Bumps simultaneously are allowed to solidify.

It, can when removing first base material layer in the case where the first liquid crystal layer with substrate layer includes first alignment layer To be peeled off together first alignment layer with first base material layer, first alignment layer can also be remained on the first liquid crystal layer.Having base It, can be with the second substrate layer one when removing the second substrate layer in the case that second liquid crystal layer of material layer includes second orientation layer Removing second orientation layer is played, second orientation layer can also be remained on the second liquid crystal layer.It should be noted that then by first Oriented layer is peeled off together with first base material layer, still remains on the first liquid crystal layer, can be by adjusting the closing force of each interlayer Relationship is set, for example, can use at the above-mentioned sided corona treatment, corona treatment, flame carried out to first base material layer Reason, prime coat etc. are surface-treated or the ingredient of liquid crystal layer formation composition that uses to form the first liquid crystal layer is adjusted It is whole.Similarly, using the surface treatment carried out to the second substrate layer, second orientation layer can be shelled together with the second substrate layer From can also be allowed to remain on the second liquid crystal layer.

In the case where remaining first alignment layer on the first liquid crystal layer, first bonding agents cured layer can be set to first In oriented layer.In addition, adhesive layer can be set to second orientation in the case where remaining second orientation layer on the second liquid crystal layer On layer.

(circularly polarizing plate)

The optical laminate of present embodiment can be used as circularly polarizing plate use.It is laminated using optics shown in Fig. 4 (b) Optical film 60 can be set as polarizing film, polarization plates or with the polarization of protecting film as in the case where circularly polarizing plate by body 70 Plate, is set as 1/2 wavelength phase difference layer for the first liquid crystal layer 12, and the second liquid crystal layer 22 is set as 1/4 wavelength phase difference layer.Alternatively, In the same manner as described above on the basis of optical film 60 being set as polarizing film, polarization plates or with the polarization plates of protecting film, by first Liquid crystal layer 12 is set as 1/4 wavelength phase difference layer of inverse wave length dispersibility, and the second liquid crystal layer 22 is set as positive c plate, thus can also be with Obtain circularly polarizing plate.

[embodiment]

Hereinafter, provide Examples and Comparative Examples and the present invention is further elaborated with, however the present invention is not by these Example limits." % " and " part " in embodiment, comparative example is exactly quality % and mass parts as long as no particularly pointing out.

(measurement (1) of curling)

From the optical laminate for having adhesive layer obtained in each embodiment, each comparative example, the length for cutting out one side is The diamond shape of 100mm, and keep its diagonal line parallel with the direction MD and the direction TD difference, by the resulting piece that cuts out in temperature 23 DEG C, place 24 hours in the environment of relative humidity 55% after, remove the first spacer and test piece.The test film is abundant It after electrostatic is eliminated on ground, is placed in the concave surface of test film upward on datum level (horizontal platform), 4 angles of test film is distinguished Determine the height relative to datum level.For measured value, if test film is placed in the way of making protecting film side upside The curling is set as just crimp then in the case where the angle of test film tilts by datum level, and the height by angle relative to datum level is used Positive numerical value indicates.On the other hand, it if test film is placed in datum level in the way of making protecting film side downside, is testing In the case that the angle of piece tilts, which is set as warp song, the height by angle relative to datum level is indicated with negative numerical value.

Measured value obtained by the test film of the optical laminate of adhesive layer is come with for measuring, and is parallel to MD to being in The measured value of the height relative to datum level at 2 angles on the diagonal line in direction is averaged, by resulting value as actual measurement MD crimp values calculate, to the measured value of the height relative to datum level in 2 angles being parallel on the diagonal line in the direction TD It is averaged, resulting value is calculated as actual measurement TD crimp values.

In addition, for the polarization plates for having protecting film used in each embodiment, each comparative example, also using same as described above The step of cut out, the height relative to datum level is measured to 4 angles of resulting test film respectively, utilizes step same as described above Suddenly it is averaged to measured value, actual measurement MD crimp values and actual measurement TD crimp values is calculated to the polarization plates with protecting film.

From the actual measurement MD crimp values of the resulting polarization plates with protecting film, the optical laminate with adhesive layer is subtracted Actual measurement MD crimp values, using resulting value as the MD crimp values of the optical laminate with adhesive layer when having a protecting film.Together Sample, from the actual measurement TD crimp values of the resulting polarization plates with protecting film, subtract the optical laminate with adhesive layer TD crimp values are surveyed, using resulting value as the TD crimp values of the optical laminate with adhesive layer when having a protecting film.

(measurement (2) of curling)

Piece is cut out from the optical laminate for having adhesive layer obtained in each embodiment, each comparative example, it will be from this Cut out in piece and to be peeled off together material obtained by protecting film with the first spacer as test film, in addition to this, using with above-mentioned volume The identical step of bent measurement (1) calculates the actual measurement MD crimp values for having removed the optical laminate of protecting film and actual measurement TD curling Value.It should be noted that for measured value, if test film is placed in datum level in the way of making polarization plates side upside, In the case where the angle of test film tilts, which is set as just crimp, the positive numerical value of height by angle relative to datum level It indicates.On the other hand, it if test film is placed in datum level in the way of making polarization plates side downside, is stuck up at the angle of test film In the case where rising, which is set as warp song, the height by angle relative to datum level is indicated with negative numerical value.

In addition, from used in each embodiment, each comparative example have protecting film polarization plates in cut out piece, for from The polarization plates for having removed protecting film in piece are cut out, also 4 angles of the test film cut out using step same as described above are distinguished The height relative to datum level is measured, is averaged using step same as described above to measured value, protecting film has been removed in calculating Polarization plates actual measurement MD crimp values and actual measurement TD crimp values.

From the actual measurement MD crimp values for the polarization plates for having removed protecting film, the optical laminate for having removed protecting film is subtracted MD crimp values are surveyed, the MD crimp values of the optical laminate with adhesive layer when by resulting value as unshielded film.Equally Ground subtracts the actual measurement for having removed the optical laminate of protecting film from the actual measurement TD crimp values for the polarization plates for having removed protecting film TD crimp values, the TD crimp values of the optical laminate with adhesive layer when by resulting value as unshielded film.

The measurement (1) of above-mentioned curling and (2) if obtained in MD crimp values and TD crimp values its values be positive or 0, then it represents that Warp song is inhibited, in addition, absolute value is bigger in the case where its value is negative, then it represents that warp song more aggravates.

(preparation of the two-sided adhesive layer with spacer)

Benefit produces adhesive in the following method.To have blender, thermometer, reflux cooler, Dropping feeder and In the reaction vessel of nitrogen ingress pipe, 97.0 parts of n-butyl acrylate, 1.0 parts of acrylic acid, acrylic acid 2- hydroxy methacrylate is added 0.5 part, 200 parts of ethyl acetate and 2,0.08 part of 2'- azodiisobutyronitrile, by the air nitrogen in above-mentioned reaction vessel Displacement.It stirs in a nitrogen atmosphere on one side, after reaction solution is warming up to 60 DEG C, reaction 6 hours on one side, is cooled to room temperature.It surveys The weight average molecular weight of a part of resulting solution is made, as a result, confirmation obtains 1,800,000 (methyl) acrylic ester polymerization Object.

100 parts of (the solid component scaled values of (methyl) acrylate polymer that will be obtained using aforesaid operations；Following phase Together), as trimethylolpropane modified toluene diisocyanate (the Tosoh Co. Ltd. system, commodity of isocyanates system crosslinking agent Name " CORONATE L ") 0.30 part and as silane coupling agent 3- glycidoxypropyltrime,hoxysilane (SHIN-ETSU HANTOTAI Learn Industrial Co., Ltd's system, trade name " KBM403 ") 0.30 part of mixing, it fully stirs, is diluted with ethyl acetate, thus obtained The coating solution of adhesive composition.

To the demoulding process face for the first spacer (LINTEC Co. Ltd. system: SP-PLR382190) for forming peeling layer (release surface) by spreader by make it is dry after with a thickness of 25 μm in the way of be coated with the coating solution of above-mentioned adhesive composition Afterwards, 100 DEG C dry 1 minute and form adhesive layer, in adhesive layer and the face opposite face that be bonded spacer, another of fitting Second spacer (LINTEC corporation: SP-PLR381031), obtains the two-sided adhesive layer with spacer.

(preparation of adhesive composite)

After cation-curable ingredient a1~a3 shown in will be following and cationic polymerization initiators mix, remix following Shown in cationic polymerization initiators and sensitizer, then carry out deaeration, prepare the adhesive composite of light-cured type.

Cation-curable ingredient a1 (70 parts):

3', 4'- epoxycyclohexyl-methyl 3', 4'- 7-oxa-bicyclo[4.1.0 formic acid esters (trade name: CEL2021P, Co., Ltd. Daicel system)；

Cation-curable ingredient a2 (20 parts):

Neopentylglycol diglycidyl ether (trade name: EX-211, Nagase ChemteX Co. Ltd. system)；

Cation-curable ingredient a3 (10 parts):

2- hexyl glycidyl ether (trade name: EX-121, Nagase ChemteX Co. Ltd. system)；

Cationic polymerization initiators (2.25 parts (solid content)):

Trade name: the 50% polypropylene carbonate ester solution of CPI-100 (San-Apro Co. Ltd. system)；

Sensitizer (2 parts):

Isosorbide-5-Nitrae-diethoxy naphthalene.

(preparations of the polarization plates with protecting film)

20 μm of thickness of polyvinyl alcohol films (99.9 moles of average degree of polymerization about 2400, saponification degree % or more) are utilized into dry type Tensile uniaxial is stretched as about 5 times, then after keeping tense situation unchangeably to impregnate 1 minute in 60 DEG C of pure water, in iodine/iodate It is impregnated 60 seconds in the aqueous solution that potassium/water mass ratio is 0.05/5/100 at 28 DEG C.Thereafter, in potassium iodide/boric acid/water quality Than being impregnated 300 seconds in the aqueous solution for 8.5/8.5/100 at 72 DEG C.Next after cleaning 20 seconds with 26 DEG C of pure water, at 65 DEG C It is dry, obtain 7 μm of thickness of the polarizing film for being adsorbed with iodine on polyvinyl alcohol film and being orientated.

Then, the epoxy bonding agent obtained as follows is coated in the side of the polarizing film, that is, relative to 100 parts of water, dissolution 3 parts of carboxy-modified polyvinyl alcohol (trade name " KL-318 " obtained from (strain) Kuraray), and add and make into the aqueous solution For the daiamid epoxy system additive (trade name " Sumirez that Cong Tiangang chemical industry (strain) obtains of water-soluble epoxy resin The aqueous solution of Resin 650 (30) ", solid component concentration 30%) 1.5 parts, as protective layer, 13 μm of coating thickness transparent Norbornene resin film.It operates as described, obtains the polarization plates in the one side stacking matcoveredn of polarizing film.It is dropping again The polyethylene terephthalate that 38 μm of thickness are fitted in the surface of polarizing film opposite side of bornylene resin film (PET) it is formed with the protecting film of 15 μm of acrylic acid series adhesive layer on film, obtains 73 μm of thickness of the polarization plates with protecting film. The actual measurement MD crimp values of the polarization plates with protecting film are -20mm, and actual measurement TD crimp values are 1mm.In addition, having removed protection The actual measurement MD crimp values of the polarization plates of film are 4mm, and actual measurement TD crimp values are -1mm.

(preparation of the first liquid crystal layer with substrate layer and the second liquid crystal layer with substrate layer)

(light redirecting layer forms the preparation for using composition (1))

Following ingredients is mixed, resulting mixture is stirred 1 hour at 80 DEG C of temperature, thus obtains light redirecting layer shape At with composition (1).

Light orientation material (5 parts):

[changing 2]

Solvent (95 parts): cyclopentanone.

(oriented layer forms the preparation for using composition (2))

Add into the commercially available SUNEVER SE-610 (Nissan Chemical Ind Ltd's system) as orientation polymer Enter butoxy ethanol and obtains oriented layer formation composition (2).Resulting oriented layer forms the solid for using composition (2) Ingredient is 1% relative to the content ratio of the total amount of the composition, and solvent is relative to the content ratio of the total amount of the composition 99%.The solid content of SUNEVER SE-610 is obtained according to the concentration conversion recorded in kinds of goods specifications.

(liquid crystal layer forms the preparation for using composition (A-1))

Following ingredients is mixed, resulting mixture is stirred 1 hour at 80 DEG C, liquid crystal layer is thus obtained and is formed with combination Object (A-1).Polymerizable liquid crystal compound A1 and polymerizable liquid crystal compound A2 utilizes Japanese Unexamined Patent Publication 2010-31223 bulletin The method of middle record synthesizes.

Polymerizable liquid crystal compound A1 (80 parts):

[changing 3]

Polymerizable liquid crystal compound A2 (20 parts):

[changing 4]

Polymerization initiator (6 parts):

2- dimethylamino -2- benzyl -1- (4- morpholinyl phenyl) -1- butanone (Irgacure369；Ciba Specialty Chemicals corporation)；

Solvent (400 parts): cyclopentanone.

(liquid crystal layer forms the preparation for using composition (B-1))

Following ingredients is mixed, by resulting mixture after 80 DEG C are stirred 1 hour, room temperature is cooled to and obtains liquid crystal layer It is formed and uses composition (B-1).

Polymerizable liquid crystal compound LC242 (BASF AG's system) (19.2%):

[changing 5]

Polymerization initiator (0.5%):

Irgacure (registered trademark) 907 (BASF Japan corporation)；

Reaction additives (1.1%):

Laromer (registered trademark) LR-9000 (BASF Japan corporation)；

Solvent (79.1%): propylene glycol 1- monomethyl ether 2- acetic acid esters.

(manufacture of the first liquid crystal layer with substrate layer)

Corona treatment plant (AGF-B10, spring are used to 100 μm of thickness of polyethylene terephthalate (PET) films Day Electric Co., Ltd system), in power 0.3kW, the processing of 3m/ minute conditions of processing speed 1 time.Implementing sided corona treatment Surface bar coater is coated with light redirecting layer formation and uses composition (1), 1 minute dry at 80 DEG C, uses polarization UV light irradiation device (SPOTCURE SP-7；USHIO Electric Co., Ltd system), with 100mJ/cm²Accumulated light implement polarization UV exposure, obtain Light redirecting layer.The thickness of resulting light redirecting layer is determined using laser microscope (LEXT, Olympus Co., Ltd's system), It as a result is 100nm.

Next, using the formation of bar coater coating liquid crystal layer with composition (A-1) in light redirecting layer, in 120 DEG C of dryings After 1 minute, using high-pressure mercury-vapor lamp (Unicure VB -15201BY-A, USHIO Electric Co., Ltd system), ultraviolet light is irradiated (under nitrogen atmosphere, wavelength: the accumulated light at 365nm, wavelength 365nm: 1000mJ/cm²), it is consequently formed as phase separation layer The first liquid crystal layer, obtain the first liquid crystal layer with substrate layer.First liquid crystal layer with a thickness of 2 μm.

(manufacture of the second liquid crystal layer with substrate layer)

Corona treatment plant (AGF-B10, springtime are used to 38 μm of thickness of polyethylene terephthalate (PET) films Electric Co., Ltd's system), it is handled 1 time under conditions of power 0.3kW, processing speed 3m/ minutes.Implementing sided corona treatment Surface bar coater is coated with oriented layer formation and uses composition (2), 1 minute dry at 90 DEG C, obtains oriented layer.Utilize laser microscope The thickness that (LEXT, Olympus Co., Ltd's system) determines resulting oriented layer, as a result 34nm.

Next, using the formation of bar coater coating liquid crystal layer with composition (B-1) in oriented layer, it is 1 point dry at 90 DEG C Zhong Hou irradiates ultraviolet light (nitrogen using high-pressure mercury-vapor lamp (Unicure VB -15201BY-A, USHIO Electric Co., Ltd system) Under gas atmosphere, wavelength: the accumulated light at 365nm, wavelength 365nm: 1000mJ/cm²), it is consequently formed as phase separation layer Second liquid crystal layer obtains the second liquid crystal layer with substrate layer.Second liquid crystal layer with a thickness of 1 μm.

(embodiment 1)

Using prepare in aforesaid operations the first liquid crystal layer with substrate layer, the second liquid crystal layer with substrate layer, with And the two-sided adhesive layer with spacer, the optical laminate with adhesive layer is obtained using process shown in FIG. 1 to FIG. 6.Tool For body, carry out as shown below.

To the second liquid crystal layer (direction the MD direction the length 300mm × TD length with substrate layer prepared in aforesaid operations Surface implementation sided corona treatment (800W, 10m/min, bar electrode width (バー width) 700mm of the second liquid crystal layer side 200mm), 1Pass).In the sided corona treatment face using coating machine (bar coater of first physical and chemical (strain) system) so that the thickness of bonding agent cured layer It is coated with the adhesive composite prepared in aforesaid operations for 1 μm of mode, is formed adhesive composite layer (referring to Fig.1 (c)).So Afterwards, to the first liquid crystal layer (direction MD length 300mm × TD direction length 200mm) with substrate layer prepared in aforesaid operations The first liquid crystal layer side implement sided corona treatment under conditions of same as described above, the sided corona treatment face and will be formed in substrate After adhesive composite layer on second liquid crystal layer of layer is bonded using sticker (" LPA3301 " of FUJIPLA (strain) system) (referring to Fig.1 (d)), from the second liquid crystal layer side for having substrate layer, using the ultraviolet lamp with conveyer belt, (lamp is used " the H fluorescent tube " of Fusion UV Systems corporation), in the region UVA exposure intensity be 390mW/cm², accumulated light be 420mJ/cm², in the region UVB be 400mW/cm², accumulated light 400mJ/cm²Mode, irradiate ultraviolet light and make to be bonded The solidification of agent composition obtains the liquid crystal layer laminates with substrate layer (referring to Fig. 2 (a)).It should be noted that if using above-mentioned Calculation method calculate the storage modulus at room temperature of bonding agent cured layer obtained by above-mentioned adhesive composite layer solidifies, then about For 3000MPa.

To the polarization plates (direction the MD direction the length 300mm × TD length with protecting film prepared in aforesaid operations Face implementation sided corona treatment (the 800W, 10m/min, bar electrode width with protecting film side opposite side (polarizing film side) 200mm) 700mm,1Pass).The adhesive composite prepared in aforesaid operations is used into coating machine (bar coater of first physical and chemical (strain) system) By make bonding agent cured layer with a thickness of 1 μm in a manner of be coated with, form adhesive composite layer, obtain inclined with composition layer Vibration plate (referring to Fig. 3 (a)).

PET film (the thickness 100 of the first liquid crystal layer with substrate layer of liquid crystal layer laminates by removing with substrate layer μm) and the adhesive composite layer of the face (face of the first liquid crystal layer side) exposed and the polarization plates for having composition layer uses stickup (referring to Fig. 3 (b)) after device (" LPA3301 " of FUJIPLA (strain) system) fitting, from the protection of the polarization plates with composition layer Film side, using the ultraviolet lamp " the H fluorescent tube " of Fusion UV Systems corporation (lamp use) with conveyer belt, With in the region UVA exposure intensity be 390mW/cm², accumulated light 420mJ/cm², in the region UVB be 400mW/cm², it is tired Product light quantity is 400mJ/cm²Mode, irradiate ultraviolet light and solidify adhesive composite, obtain the optical layer with substrate layer Stack (referring to Fig. 4 (a)).The second liquid crystal layer with substrate layer of the resulting optical laminate with substrate layer will be removed PET film (38 μm of thickness) and the face (face of the second liquid crystal layer side) exposed with prepare from aforesaid operations it is two-sided with spacer Adhesive layer (300mm × 200mm) remove the second spacer and the adhesive layer that exposes uses individual patch of automatic laminating machine utilizing HALTEC It closes, obtains the optical laminate (1) with adhesive layer (referring to Fig. 5 (b)).To the resulting optical laminate with adhesive layer (1) measurement (1) being crimped and (2) calculate the MD crimp values and TD crimp values of the optical laminate (1) with adhesive layer.

It the results are shown in table 1.

(comparative example 1)

Using prepare in aforesaid operations the first liquid crystal layer with substrate layer, the second liquid crystal layer with substrate layer, with And the two-sided adhesive layer with spacer, the optical laminate with adhesive layer is obtained using Fig. 7~process shown in Fig. 9.Tool For body, carry out as shown below.

To the polarization plates (direction the MD direction the length 300mm × TD length with protecting film prepared in aforesaid operations Face implementation sided corona treatment (the 800W, 10m/min, bar electrode width with protecting film side opposite side (polarizing film side) 200mm) 700mm,1Pass).In addition, two-sided adhesive layer (300mm × 200mm) removing with spacer prepared from aforesaid operations Second spacer.Using automatic laminating machine utilizing HALTEC, carry out the sided corona treatment faces of the polarization plates with protecting film with from double-sides belt There is the adhesive layer of spacer to remove the second spacer and individual fitting of the adhesive layer that exposes obtains the polarization with adhesive layer Plate (referring to Fig. 7 (a)).

It will be quasi- from the adhesive layer and aforesaid operations that the above-mentioned polarization plates with adhesive layer remove the first spacer and expose First liquid crystal layer of standby the first liquid crystal layer (direction MD length 300mm × TD direction length 200mm) with substrate layer uses Individual fitting of automatic laminating machine utilizing HALTEC (referring to Fig. 7 (c)).

Next, by the removing PET for the first liquid crystal layer with substrate layer being bonded with the polarization plates with protecting film Film (100 μm of thickness) and expose face (face of the first liquid crystal layer side), with prepare from aforesaid operations it is two-sided with spacer Adhesive layer (300mm × 200mm) remove the second spacer and the adhesive layer that exposes uses individual patch of automatic laminating machine utilizing HALTEC After conjunction, then remove the first spacer (referring to Fig. 8 (a)).The first spacer will be removed and in the adhesive layer and aforesaid operations that expose Second liquid crystal layer of the second liquid crystal layer (direction MD length 300mm × TD direction length 200mm) with substrate layer prepared makes With individual fitting of automatic laminating machine utilizing HALTEC, the optical laminate (Fig. 8 (c)) with substrate layer is obtained.

It will be (thick from the PET film of resulting second liquid crystal layer of the optical laminate removing with substrate layer with substrate layer 38 μm of degree) and the face (face of the second liquid crystal layer side) exposed and the two-sided bonding with spacer prepared from aforesaid operations The adhesive layer that layer (300mm × 200mm) is removed the second spacer and exposed uses individual fitting of automatic laminating machine utilizing HALTEC, obtains Optical laminate (2) with adhesive layer.The measurement (1) that the resulting optical laminate (2) with adhesive layer is crimped And (2), calculate the MD crimp values and TD crimp values of the optical laminate (2) with adhesive layer.It the results are shown in table 1.

[table 1]

As shown in table 1, the optical laminate obtained in embodiment 1 with adhesive layer has with obtained in comparative example 1 The optical laminate of adhesive layer is compared, and warp song is inhibited, it is known that has adhesive layer according to what is illustrated in above embodiment Optical laminate manufacturing method, warp can be inhibited bent.

Claims

1. a kind of manufacturing method of the optical laminate with adhesive layer is by optical film, first bonding agents cured layer, the first liquid Optical laminate with adhesive layer obtained by crystal layer, second bonding agents cured layer, the second liquid crystal layer and bonding layer stackup Manufacturing method,

The manufacturing method includes:

Prepare the process of the first liquid crystal layer with substrate layer, first liquid crystal layer with substrate layer has first base material Layer and first liquid crystal layer for forming polymerizable liquid crystal compound polymerization on the first base material layer；

Prepare the process of the second liquid crystal layer with substrate layer, second liquid crystal layer with substrate layer has the second substrate Layer and second liquid crystal layer for forming polymerizable liquid crystal compound polymerization on second substrate layer；

The process for obtaining the liquid crystal layer laminates with substrate layer makes described first across the second bonding agents cured layer with folder First liquid crystal layer with substrate layer is had substrate with described by liquid crystal layer and the facing mode of second liquid crystal layer Second liquid crystal layer stackup of layer and obtain the liquid crystal layer laminates with substrate layer；

The process for obtaining liquid crystal layer laminates at least removes the first base material from the liquid crystal layer laminates with substrate layer Layer and obtain liquid crystal layer laminates；

The process for obtaining optical laminate, the first of the liquid crystal layer laminates exposed because removing the first base material layer Expose surface side, folder obtains optical laminate across optical film described in first bonding agents solidification layer stackup；

The process for removing second substrate layer from the liquid crystal layer laminates with substrate layer or the optical laminate；With

Expose surface side the second of the optical laminate exposed because removing second substrate layer and the adhesive layer is laminated Process.

2. the manufacturing method of the optical laminate according to claim 1 with adhesive layer, wherein

The process for obtaining optical laminate includes:

The process for forming first bonding agents composition layer, described the first of the optical film and the liquid crystal layer laminates At least one party in exposed surface forms the of the first bonding agents composition comprising being used to form the first bonding agents cured layer One adhesive composite layer；With

The process for forming the first bonding agents cured layer, in folder across the first bonding agents composition layer in first dew After the optical film is laminated in surface side out, the first bonding agents composition layer is solidified to form the first bonding agents and is solidified Layer.

3. the manufacturing method of the optical laminate according to claim 1 or 2 with adhesive layer, wherein

The process for forming second bonding agents composition layer, in first liquid crystal of first liquid crystal layer with substrate layer At least one party in second liquid crystal layer of layer and second liquid crystal layer with substrate layer, forms comprising being used for shape At the second bonding agents composition layer of the adhesive composite of the second bonding agents cured layer；With

The process for forming the second bonding agents cured layer makes described first across the second bonding agents composition layer with folder First liquid crystal layer with substrate layer is had substrate with described by liquid crystal layer and the facing mode of second liquid crystal layer After second liquid crystal layer stackup of layer, the second bonding agents composition layer is solidified to form the second bonding agents cured layer.

4. the manufacturing method of the optical laminate described in any one of claim 1 to 3 with adhesive layer, wherein

The process for obtaining liquid crystal layer laminates is that the liquid crystal layer laminates from described with substrate layer remove first base Material layer and the process for not removing second substrate layer,

5. the manufacturing method of the optical laminate described in any one of claim 1 to 3 with adhesive layer, wherein

The process for obtaining liquid crystal layer laminates is that the liquid crystal layer laminates from described with substrate layer remove first base Material layer and second substrate layer and the process for obtaining liquid crystal layer laminates.

6. the manufacturing method of the optical laminate according to any one of claims 1 to 5 with adhesive layer, wherein

The process that the adhesive layer is laminated includes:

It is shelled after the adhesive layer of the adhesive layer with peeling layer is bonded with the second exposed surface of the optical laminate Process from the peeling layer.

7. a kind of manufacturing method of the optical laminate with adhesive layer,

It is to be sequentially laminated with optical film, first bonding agents cured layer, the first liquid crystal layer, second bonding agents cured layer, the second liquid crystal The manufacturing method of the optical laminate with adhesive layer of layer and adhesive layer,

The manufacturing method includes:

The process for obtaining liquid crystal layer laminates at least removes second substrate from the liquid crystal layer laminates with substrate layer Layer and obtain liquid crystal layer laminates；

The process for obtaining the liquid crystal layer laminates with adhesive layer, in the liquid crystal exposed because removing second substrate layer The second of layer laminates exposes surface side, and the adhesive layer is laminated and obtains the liquid crystal layer laminates with adhesive layer；

From the liquid crystal layer laminates with substrate layer or the liquid crystal layer laminates removing described first with adhesive layer The process of substrate layer；With

First of the liquid crystal layer laminates with adhesive layer described in exposing because removing the first base material layer exposes surface side The process that folder solidifies optical film described in layer stackup across the first bonding agents.

8. the manufacturing method of the optical laminate according to claim 7 with adhesive layer, wherein

Expose face paste for described the second of the adhesive layer of the adhesive layer with peeling layer and the liquid crystal layer laminates The process of the peeling layer is removed after conjunction.

9. the manufacturing method of the optical laminate described according to claim 1~any one of 8 with adhesive layer, wherein

The optical film includes polarization plates.

10. the manufacturing method of the optical laminate described according to claim 1~any one of 9 with adhesive layer, wherein

At least one side that the optical film is included in polarization plates is laminated with the polarization plates with protecting film of protecting film.