CN110531457A

CN110531457A - The manufacturing method of circularly polarizing plate

Info

Publication number: CN110531457A
Application number: CN201910436960.5A
Authority: CN
Inventors: 仲俊之; 仓本贤尚
Original assignee: Sumitomo Chemical Co Ltd
Current assignee: Sumitomo Chemical Co Ltd
Priority date: 2018-05-25
Filing date: 2019-05-23
Publication date: 2019-12-03
Anticipated expiration: 2039-05-23
Also published as: CN110531457B

Abstract

Successively the manufacturing method comprising at least circularly polarizing plate of the polarization function layer containing linear polarization layer, polarization function layer adhesive layer, the first liquid crystal layer, adhesive layer and the second liquid crystal layer includes preparing the process for the layer containing the liquid crystal layer with first base material layer for successively having above-mentioned adhesive layer, above-mentioned second liquid crystal layer and the second substrate layer in above-mentioned first liquid crystal layer side with first base material layer and the first liquid crystal layer with substrate layer of the first liquid crystal layer；The process for forming exposed surface in the substrate layer side of the first liquid crystal layer from the layer peeling base layer containing the liquid crystal layer with first base material layer；It obtains being equipped with the process for being used to form the layer containing the liquid crystal layer with first chamber layer of polarization function layer adhesive composition layer of polarization function layer adhesive layer in exposed surface；With the process of polarization function layer adhesive composition layer and polarization function the layer fitting of the layer that will contain the liquid crystal layer with first chamber layer.First liquid crystal layer is obtained and polymerizeing polymerizable liquid crystal compound on first base material layer.

Description

The manufacturing method of circularly polarizing plate

Technical field

The present invention relates to the manufacturing methods of circularly polarizing plate.

Background technique

In the display devices such as organic EL display device, liquid crystal display device, using including the light such as polarizing coating, phase difference film Learn the component of anisotropic membrane.The external light reflection caused by metal electrode is easy especially in organic EL display device due to enable Opinion property reduce, therefore, for the purpose for preventing the external light reflection using combination have polarizing coating and optical anisotropic film and Component referred to as circularly polarizing plate.As optical anisotropic film used in circularly polarizing plate, it is known that be formed on base material film Optical anisotropic film obtained by the layer of liquid-crystal compounds.For example, being described in JP2014-222282 bulletin for justifying Liquid crystal material is used in the phase separation layer of the optical film of polarization plates etc..

Summary of the invention

In general, can see that side has circularly polarizing plate in organic EL display panel, therefore, if fold, gas occur for circularly polarizing plate Bubble, unequal abnormal appearance, then the visibility of organic EL display device is easily reduced.

The object of the present invention is to provide suitable for the circularly polarizing plate manufacturer for forming the circularly polarizing plate with liquid crystal layer Method.

The present invention provides the manufacturing method of circularly polarizing plate as shown below.

(1) a kind of manufacturing method of circularly polarizing plate, be successively comprising at least polarization function layer containing linear polarization layer, Polarization function layer adhesive layer, the first liquid crystal layer, adhesive layer and the second liquid crystal layer circularly polarizing plate manufacturing method comprising:

Prepare the process of the layer containing the liquid crystal layer with first base material layer, it is described containing the liquid crystal layer with first base material layer Layer above-mentioned first liquid crystal layer side with first base material layer and the first liquid crystal layer with substrate layer of above-mentioned first liquid crystal layer according to It is secondary that there is above-mentioned adhesive layer, above-mentioned second liquid crystal layer and the second substrate layer；

Above-mentioned first base material layer is removed from the above-mentioned layer containing the liquid crystal layer with first base material layer and in above-mentioned first liquid The process that the above-mentioned first base material layer side of crystal layer forms exposed surface；

The process for obtaining the layer containing the liquid crystal layer with first chamber layer, it is described to contain the liquid crystal with first chamber layer The layer of layer is equipped with the polarization function layer bonding combination for being used to form above-mentioned polarization function layer adhesive layer in above-mentioned exposed surface Nitride layer；And

The above-mentioned layer containing the liquid crystal layer with first chamber layer above-mentioned polarization function layer on adhesive composition layer The process for being bonded above-mentioned polarization function layer,

Above-mentioned first liquid crystal layer is liquid crystal obtained from polymerizeing polymerizable liquid crystal compound on above-mentioned first base material layer Layer,

Above-mentioned first liquid crystal layer and above-mentioned second liquid crystal layer meet the relationship of following [a] or [b]:

[a] above-mentioned first liquid crystal layer is 1/2 wave plate, and above-mentioned second liquid crystal layer is quarter wave plate,

One of [b] above-mentioned first liquid crystal layer and above-mentioned second liquid crystal layer are the quarter wave plate of inverse wave length dispersibility, another Person is positive c plate.

(2) a kind of manufacturing method of circularly polarizing plate, be successively comprising at least polarization function layer containing linear polarization layer, Polarization function layer adhesive layer, the first liquid crystal layer, adhesive layer and the second liquid crystal layer circularly polarizing plate manufacturing method comprising:

Prepare the process of the layer of the liquid crystal layer containing the second substrate layer of band, the liquid crystal layer containing the second substrate layer of band Layer successively has above-mentioned polarization function layer, above-mentioned polarization function layer adhesive layer and from above-mentioned polarization function layer adhesive layer side Successively the first liquid crystal layer with substrate layer with above-mentioned first liquid crystal layer and first base material layer；

Above-mentioned first base material layer is removed from the layer of the above-mentioned liquid crystal layer containing the second substrate layer of band and in above-mentioned first liquid The process that the above-mentioned first base material layer side of crystal layer forms exposed surface；

The process for obtaining the layer containing the liquid crystal layer with second chamber layer, it is described to contain the liquid crystal with second chamber layer The layer of layer is equipped with the adhesive composition layer for being used to form above-mentioned adhesive layer in above-mentioned exposed surface；And

By above-mentioned second liquid crystal with the second substrate layer and the second liquid crystal layer with substrate layer of above-mentioned second liquid crystal layer Layer side is fitted in the process on the above-mentioned adhesive composition layer of the above-mentioned layer containing the liquid crystal layer with second chamber layer,

(3) manufacturing method of the circularly polarizing plate according to (2), wherein liquid of the above-mentioned preparation containing the second substrate layer of band The process of the layer of crystal layer includes:

Prepare the process of the polarization function layer with composition layer, the polarization function layer with composition layer is in above-mentioned polarization Functional layer is equipped with the polarization function layer adhesive composition layer for being used to form above-mentioned polarization function layer adhesive layer；And

First liquid crystal layer side of above-mentioned the first liquid crystal layer with substrate layer is fitted in the above-mentioned polarization function with composition layer Above-mentioned process of the polarization function layer on adhesive composition layer of ergosphere.

(4) manufacturing method of the circularly polarizing plate according to any one of (1)~(3), wherein above-mentioned with substrate layer One liquid crystal layer includes first alignment layer between above-mentioned first liquid crystal layer and above-mentioned first base material layer,

The process of above-mentioned formation exposed surface is peeled off together above-mentioned first alignment layer together with above-mentioned first base material layer.

(5) manufacturing method of the circularly polarizing plate according to (1), wherein above-mentioned the first liquid crystal layer with substrate layer is upper Stating includes first alignment layer between the first liquid crystal layer and above-mentioned first base material layer,

The above-mentioned layer containing the liquid crystal layer with first chamber layer is used in above-mentioned first liquid crystal layer and above-mentioned polarization function layer There is above-mentioned first alignment layer between adhesive composition layer.

(6) manufacturing method of the circularly polarizing plate according to (2) or (3), wherein above-mentioned the first liquid crystal layer with substrate layer It include first alignment layer between above-mentioned first liquid crystal layer and above-mentioned first base material layer,

The above-mentioned layer containing the liquid crystal layer with second chamber layer is in above-mentioned first liquid crystal layer and above-mentioned adhesive composition layer Between have above-mentioned first alignment layer.

(7) manufacturing method of the circularly polarizing plate according to any one of (1)~(6), wherein above-mentioned first liquid crystal layer packet Containing levelling agent.

(8) manufacturing method of the circularly polarizing plate according to any one of (1)~(7), wherein above-mentioned adhesive layer is bonding Agent cured layer or adhesive phase.

(9) manufacturing method of the circularly polarizing plate according to any one of (1)~(8), wherein above-mentioned adhesive layer is bonding Agent cured layer,

The adhesive composition layer for being used to form above-mentioned adhesive layer includes active energy ray curable bonding agent.

(10) manufacturing method of the circularly polarizing plate according to any one of (1)~(9), wherein above-mentioned first liquid crystal layer For 1/2 wave plate, above-mentioned second liquid crystal layer is quarter wave plate.

(11) manufacturing method of the circularly polarizing plate according to any one of (1)~(9), wherein above-mentioned first liquid crystal layer For the quarter wave plate of inverse wave length dispersibility, above-mentioned second liquid crystal layer is positive c plate.

(12) manufacturing method of the circularly polarizing plate according to any one of (1)~(11), wherein above-mentioned polarization function layer It is bonding agent cured layer or adhesive phase with adhesive layer.

(13) manufacturing method of the circularly polarizing plate according to any one of (1)~(12), wherein above-mentioned second liquid crystal layer For liquid crystal layer obtained from polymerizeing polymerizable liquid crystal compound on above-mentioned second substrate layer.

(14) manufacturing method of the circularly polarizing plate according to any one of (1)~(13) comprising in above-mentioned fitting The process for removing above-mentioned second substrate layer after process.

(15) manufacturing method of the circularly polarizing plate according to any one of (1)~(14), wherein above-mentioned polarization function layer For the polarization plates at least one face of above-mentioned linear polarization layer including protective layer.

The effect of invention

According to the present invention it is possible to provide the manufacturing method suitable for manufacture circularly polarizing plate.

Detailed description of the invention

(a) of Fig. 1~(e) is the diagrammatic sectional view for schematically showing an example of manufacturing process of circularly polarizing plate of the invention Figure.

(a) of Fig. 2~(c) is the diagrammatic sectional view for schematically showing the connecting of manufacturing process of circularly polarizing plate shown in Fig. 1 Figure.

(a) of Fig. 3~(c) is the diagrammatic sectional view for schematically showing the connecting of manufacturing process of circularly polarizing plate shown in Fig. 2 Figure.

(a) of Fig. 4~(d) is other the diagrammatic sectional view for schematically showing the manufacturing process of circularly polarizing plate of the invention Figure.

(a) of Fig. 5~(c) is the diagrammatic sectional view for schematically showing the connecting of manufacturing process of circularly polarizing plate shown in Fig. 4 Figure.

Sign flag explanation

10 the first liquid crystal layers with substrate layer, 11 first base material layers, 12 first liquid crystal layers, 20 the second liquid crystal with substrate layer Layer, 21 second substrate layers, 22 second liquid crystal layers, 30 adhesive layers, 30a adhesive composition layer, 31 polarization plates adhesive layer (polarization function Ergosphere adhesive layer), 31a polarization plates adhesive composition layer (polarization function layer adhesive composition layer), 34 adhesive layers, 35 light Learn element adhesive composition layer, 36 polarization plates adhesive layer (polarization function layer adhesive layer), the bonding combination of 36a polarization plates Nitride layer (polarization function layer adhesive composition layer), 41 layers containing the liquid crystal layer with substrate layer (contain the second substrate layer of band The layer of liquid crystal layer), 42 layers containing liquid crystal layer, 43 containing the liquid crystal layer with composition layer layers (containing band second chamber layer Liquid crystal layer layer), 46 layers (layer containing the liquid crystal layer with first base material layer) containing the liquid crystal layer with substrate layer, 47 contain The layer of liquid crystal layer, 48 layer (layer containing the liquid crystal layer with first chamber layer), 51 bands containing the liquid crystal layer with composition layer Circularly polarizing plate (circularly polarizing plate), 52 circularly polarizing plates, 53 circularly polarizing plates (circularly polarizing plate) with adhesive composition layer, 56 of substrate layer Circularly polarizing plate (circularly polarizing plate), 57 circularly polarizing plates with substrate layer, 58 circularly polarizing plates (circularly polarizing plate) with adhesive composition layer, 60 polarization plates (polarization function layer), 61 polarization plates (the polarization function layer with composition layer), W width direction with composition layer.

Specific embodiment

The circularly polarizing plate manufactured using the manufacturing method of circularly polarizing plate of the invention is successively comprising at least containing straight line The circular polarization of the polarization function layer, polarization function layer adhesive layer, the first liquid crystal layer, adhesive layer and the second liquid crystal layer of polarization layer Plate.In circularly polarizing plate, the first liquid crystal layer is liquid crystal obtained from polymerizeing polymerizable liquid crystal compound on first base material layer Layer.In addition, the first liquid crystal layer and the second liquid crystal layer in circularly polarizing plate meet the relationship of following [a] or [b]:

[a] first liquid crystal layer is 1/2 wave plate, and the second liquid crystal layer is quarter wave plate,

One of [b] first liquid crystal layer and the second liquid crystal layer are the quarter wave plate of inverse wave length dispersibility, and another one is positive C Plate.

In above-mentioned [b], it is preferred that above-mentioned first liquid crystal layer is the quarter wave plate of inverse wave length dispersibility, above-mentioned second liquid Crystal layer is positive c plate.

Very thin thickness can be made in above-mentioned circularly polarizing plate, thus, for example being applied to show as next-generation organic EL It is useful in terms of device, the flexible organic EL display device that can bend or wind etc..Hereinafter, sometimes that above-mentioned straight line is inclined The layer that shakes is referred to as " polarization layer ", the linear polarization plate of matcoveredn will be formed at least one face of linear polarization layer referred to as sometimes For " polarization plates ".

Hereinafter, being illustrated referring to preferred embodiment of the attached drawing to the manufacturing method of circularly polarizing plate of the invention.Give Illustrate, each embodiment as shown below and its variation can be combined arbitrarily.In addition, in each embodiment and its variation In, for element numeral the same symbol identical with the component being had been described above in the embodiment or its variation before them, And omit its description.

[embodiment 1]

FIG. 1 to FIG. 3 is the outline for schematically showing an example (embodiment 1) of the manufacturing process of circularly polarizing plate of the invention Cross-sectional view.In figure, W indicates width direction.As shown in (b) of Fig. 3, the circularly polarizing plate obtained from the manufacturing method of the present invention 52 successively include: using in polarization plates 60 (polarization function layer), the polarization plates of at least one face of polarization layer formation matcoveredn viscous Connect layer 36 (polarization function layer adhesive layer), the first liquid crystal layer 12, adhesive layer 30 and the second liquid crystal layer 22.Such as (a) and figure of Fig. 3 Shown in 3 (c), circularly polarizing plate can be in the second liquid crystal layer 22 and adhesive layer obtained from the manufacturing method of the present invention 30 opposite sides include the circularly polarizing plate of the second substrate layer 21, adhesive composition layer 35 used for optical elements.As described later, first Liquid crystal layer 12 is preferably the liquid crystal layer comprising levelling agent.

In the manufacturing method of circularly polarizing plate 52 shown in (b) of Fig. 3, firstly, carrying out following process: preparing band composition The process ((a) of Fig. 1) of the polarization plates 61 (the polarization function layer with composition layer) of layer, the polarization plates 61 with composition layer The polarization plates adhesive composition layer 36a (polarization for being used to form polarization plates adhesive layer 36 is equipped in a face of polarization plates 60 Functional layer adhesive composition layer)；Prepare the process ((b) of Fig. 1) of the first liquid crystal layer 10 with substrate layer, the band substrate layer The first liquid crystal layer 10 have and be laminated with the composition of the first liquid crystal layer 12 on first base material layer 11；And prepare with substrate layer The process ((c) of Fig. 1) of second liquid crystal layer 20, second liquid crystal layer 20 with substrate layer have on 21 upper layer of the second substrate layer It is laminated with the composition of the second liquid crystal layer 22.

In the case where the polarization plates adhesive layer 36 of circularly polarizing plate 52 is bonding agent cured layer, prepare with composition layer The process that the process of polarization plates 61 can have the coating adhesive on a face of polarization plates 60, it is possible to have as needed By the process that the bonding agent after coating is dry.In addition, circularly polarizing plate 52 polarization plates adhesive layer 36 be adhesive phase feelings Under condition, the process for preparing the polarization plates 61 with composition layer can have the work of the coating adhesive on a face of polarization plates 60 Sequence, the process for as needed drying the adhesive after coating, form in the demoulding process face of mold release film alternatively, can have Adhesive phase and the process that the adhesive phase of mold release film is needed on polarization plates 60.

As long as the process for preparing the first liquid crystal layer 10 with substrate layer can prepare comprising first base material layer 11 and the The first liquid crystal layer with substrate layer of first liquid crystal layer 12 obtained from polymerizeing polymerizable liquid crystal compound on one substrate layer 11 10, it can have the work for polymerizable liquid crystal compound being polymerize and being formed on first base material layer 11 first liquid crystal layer 12 Sequence.When polymerizeing polymerizable liquid crystal compound on first base material layer 11, can be coated on first base material layer 11 comprising poly- Polymerizable liquid crystal compound polymerize and forms the by the liquid crystal layer formation composition of conjunction property liquid-crystal compounds and after making it dry One liquid crystal layer 12.Liquid crystal layer formation composition can also include solvent, polymerization other than comprising polymerizable liquid crystal compound Initiator, reactive additive, levelling agent, polymerization inhibitor etc..It especially in the present invention, include stream in liquid crystal layer formation composition Under the case where flat agent (the case where the first liquid crystal layer includes levelling agent), more significant effect is played.

Similarly, the process for preparing the second liquid crystal layer 20 with substrate layer can have will polymerize on the second substrate layer 21 Property liquid-crystal compounds polymerization and formed the second liquid crystal layer 22 process, can also be coated on the second substrate layer 21 includes polymerism The liquid crystal layer formation composition of liquid-crystal compounds and after making it dry, polymerizable liquid crystal compound is polymerize and forms the second liquid Crystal layer 22.

Next, by the polarization plates of the polarization plates 61 with composition layer adhesive composition layer 36a and the with substrate layer First liquid crystal layer 12 of one liquid crystal layer 10 is bonded ((d) of Fig. 1), then forms polarization plates by polarization plates adhesive composition layer 36a Layer 41 (layer of the liquid crystal layer containing the second substrate layer of band) (Fig. 1 containing the liquid crystal layer with substrate layer is obtained with adhesive layer 36 (e)).As the method for forming polarization plates adhesive layer 36 with adhesive composition layer 36a by polarization plates, as long as according to polarization plates The ingredient contained in adhesive composition layer 36a is selected, for example, can carry out making polarization plates adhesive composition layer The cured processing of 36a can use polarization plates viscous in the case where being not necessarily to the ingredient of curing process without particularly handling It meets composition layer 36a and polarization plates adhesive layer 36 is made.As shown in (e) of Fig. 1, the layer 41 containing the liquid crystal layer with substrate layer according to Secondary includes polarization plates 60, polarization plates adhesive layer 36, the first liquid crystal layer 12 and first base material layer 11.

Next, referring to Fig. 2 and Fig. 3, for the layer 41 containing the liquid crystal layer with substrate layer by preparing as described above The method for obtaining circularly polarizing plate 52 is illustrated.Firstly, by removing first from the layer 41 containing the liquid crystal layer with substrate layer Substrate layer 11, to obtain successively containing liquid crystal layer comprising polarization plates 60, polarization plates adhesive layer 36 and the first liquid crystal layer 12 Layer 42 ((a) of Fig. 2).Later, carry out obtaining the layer 43 containing the liquid crystal layer with composition layer (containing band second chamber layer Liquid crystal layer layer) process ((b) of Fig. 2), the layer 43 containing the liquid crystal layer with composition layer containing liquid crystal layer Layer 42 is equipped with the adhesive composition layer 30a for being used to form adhesive layer 30.Obtaining the layer containing the liquid crystal layer with composition layer In 43 process, as shown in (b) of Fig. 2, in the layer 41 containing the liquid crystal layer with substrate layer from the layer 42 containing liquid crystal layer First base material layer 11 is removed in the exposed surface of 11 side of first base material layer of the first liquid crystal layer 12 of exposing, forms adhesive composition Layer 30a.In the case where the adhesive layer 30 of circularly polarizing plate 52 ((b) of Fig. 3) is bonding agent cured layer, in the layer containing liquid crystal layer The process that the process that adhesive composition layer 30a is formed on 42 can have the coating adhesive on the layer 42 containing liquid crystal layer, It can have as needed that the bonding agent after coating is dry process.In addition, in the bonding of circularly polarizing plate 52 ((b) of Fig. 3) In the case that layer 30 is adhesive phase, the process that adhesive composition layer 30a is formed on the layer 42 containing liquid crystal layer be can have The process of coating adhesive, the process for as needed drying the adhesive after coating on the layer 42 containing liquid crystal layer, alternatively, It can have and form adhesive phase in the demoulding process face of mold release film and the adhesive phase of mold release film is needed on containing liquid crystal The process of the layer 42 of layer.As shown in (b) of Fig. 2, the layer 43 containing the liquid crystal layer with composition layer successively comprising polarization plates 60, partially Vibration plate adhesive layer 36, the first liquid crystal layer 12 and adhesive composition layer 30a.

Next, will contain (c) of adhesive composition the layer 30a and Fig. 1 of the layer 43 of the liquid crystal layer with composition layer Shown in the second liquid crystal layer 20 with substrate layer the second liquid crystal layer 22 fitting process ((c) of Fig. 2), by adhesive composition layer 30a forms adhesive layer 30 and obtains the circularly polarizing plate 51 (circularly polarizing plate) ((a) of Fig. 3) with substrate layer.It is combined as by bonding The method that nitride layer 30a forms adhesive layer 30, as long as the ingredient according to contained in adhesive composition layer 30a is selected, example Such as, it can carry out making the cured processing of adhesive composition layer 30a, it, can not be into the case where being not necessarily to the ingredient of curing process Row particularly handles and adhesive layer 30 is made in adhesive composition layer 30a.As shown in (a) of Fig. 3, the circularly polarizing plate with substrate layer 51 successively include polarization plates 60, polarization plates adhesive layer 36, the first liquid crystal layer 12, adhesive layer 30, the second liquid crystal layer 22 and second Therefore substrate layer 21 for circularly polarizing plate obtained in the present invention and can be also the band substrate layer with the second substrate layer 21 Circularly polarizing plate.

The manufacturing method of circularly polarizing plate 52 may further include: the layer 43 that will contain the liquid crystal layer with composition layer with After the process of the second liquid crystal layer 20 fitting with substrate layer, the process ((b) of Fig. 3) of the second substrate layer 21 is removed, specially The process ((b) of Fig. 3) of the second substrate layer 21 is removed from the circularly polarizing plate 51 with substrate layer.In addition, the system of circularly polarizing plate 52 The method of making may further include: in 21 side of the second substrate layer for the second liquid crystal layer 22 that the second substrate layer 21 of removing exposes Adhesive composition layer 35 used for optical elements is formed in exposed surface, obtains the circularly polarizing plate 53 (circularly polarizing plate) with adhesive composition layer Process ((c) of Fig. 3).As shown in (c) of Fig. 3, the circularly polarizing plate 53 with adhesive composition layer successively comprising polarization plates 60, partially Vibration plate adhesive layer 36, the first liquid crystal layer 12, adhesive layer 30, the second liquid crystal layer 22 and adhesive composition layer 35 used for optical elements, It therefore, for circularly polarizing plate obtained in the present invention and can be also the band bonding group with adhesive composition layer used for optical elements Close the circularly polarizing plate of nitride layer.

In the manufacturing method of circularly polarizing plate 52, as shown in (b) of (e) of Fig. 1, (a) of Fig. 2 and Fig. 2, from containing liquid The first liquid crystal layer 12 removing first base material layer 11 in the layer 41 containing the liquid crystal layer with substrate layer of the layer 42 of crystal layer and exposing 11 side of first base material layer exposed surface (hereinafter sometimes referred to as " exposed surface of the layer 42 containing liquid crystal layer ") on, formed bonding group Close nitride layer 30a.Compared to the side opposite with first base material layer 11 of the first liquid crystal layer 12, adhesive composition layer 30a is more shown Out with the compatibility of the exposed surface of the layer 42 containing liquid crystal layer.Therefore, compared in first liquid crystal layer 12 and first base material layer The case where 11 opposite sides form adhesive composition layer combines when forming bonding in the exposed surface in the layer 42 containing liquid crystal layer In the case where nitride layer 30a, more adhesive composition layer can be formed with high closing force in the exposed surface of the layer 42 containing liquid crystal layer 30a。

Speculate that its reason is as follows.Think: since the first liquid crystal layer 12 is on first base material layer 11 by polymerizable liquid crystal Close object polymerization (reaction) and the liquid crystal layer of formation, therefore, the exposed surface of the layer 42 containing liquid crystal layer and the first liquid crystal layer 12 with The first of the opposite side of first base material layer 11 (side in atmosphere is exposed in the polymerization of polymerizable liquid crystal compound) The surface characteristic of liquid crystal layer 12 is different.By inference: according to the difference of such surface characteristic, so that each surface is bonded composition The compatibility of the adhesive composition of composition layer 30a is different, with the side opposite with first base material layer 11 of the first liquid crystal layer 12 It compares, the exposed surface of the layer 42 containing liquid crystal layer can more inhibit shrinkage cavity and form adhesive composition layer 30a.Think as a result: Compared with the side opposite with first base material layer 11 of the first liquid crystal layer 12, the exposed surface of the layer 42 containing liquid crystal layer can more inhibit The adhesive composition layer 30a formed on the layer 42 containing liquid crystal layer generates unevenness, by the layer 42 containing liquid crystal layer and can glue Composition layer 30a is met to be laminated with high closing force.It is thus regarded that: it is able to suppress and generates fold in circularly polarizing plate 52 or containing Generate bubble between the layer 42 and adhesive layer 30 of liquid crystal layer, and can by the layer 42 containing liquid crystal layer and the second liquid crystal layer 22 with High closing force stacking.In addition, can be obtained good outer due to inhibiting to generate unevenness, fold, bubble in circularly polarizing plate 52 The circularly polarizing plate of sight, to be able to suppress visibility reduction when being applied to organic EL display device.

By inference: especially when the liquid for being coated on first base material layer 11 while including polymerizable liquid crystal compound and levelling agent Crystal layer formation composition and in the case where forming the first liquid crystal layer 12, the surface of 11 side of first base material layer of the first liquid crystal layer 12 The difference of the surface characteristic of the opposite to that side of characteristic tends to get bigger.It is thought that because are as follows: levelling agent has adjustment coating liquid crystal layer The function of the flatness of formation composition and the coating layer that is formed and the first liquid crystal layer obtained by coating layer includes in coating The liquid crystal layer formation composition of levelling agent and in the first liquid crystal layer 12 for being formed, levelling agent is easily collected on and first base material layer 11 opposite sides (side in atmosphere is exposed in the polymerization of polymerizable liquid crystal compound).Speculate: compared to first First base material is removed from the layer 41 containing the liquid crystal layer with substrate layer in the side opposite with first base material layer 11 of liquid crystal layer 12 Layer 11 and expose side be the layer 42 containing liquid crystal layer exposed surface levelling agent amount it is less, therefore to constitute bonding combination The compatibility of the adhesive composition of nitride layer 30a is higher.It is thus regarded that: in the case where the first liquid crystal layer includes levelling agent, contain The exposed surface of the layer 42 of liquid crystal layer is easy the adhesive composition layer 30a for inhibiting to be formed on the layer 42 containing liquid crystal layer and generates not , the layer 42 containing liquid crystal layer and adhesive composition layer 30a can be laminated with higher closing force, to obtain good appearance Circularly polarizing plate.

In the present invention, the first liquid crystal layer 10 with substrate layer for being used to manufacture circularly polarizing plate, with substrate layer Second liquid crystal layer 20, the polarization plates 61 with composition layer and strip is both preferably using membranoid substances such as sandwich obtained from them Membranoid substance, each process is preferably carried out while continuously transporting them.Width direction W is the length direction with membranoid substance Orthogonal direction.

The manufacturing method of circularly polarizing plate of the invention can variation as shown below change like that.In addition, can With by above embodiment and it is following shown in variation arbitrarily combine.

(variation 1 of embodiment 1)

The example above is illustrated using first with substrate layer for being formed with the first liquid crystal layer 12 on first base material layer 11 Liquid crystal layer 10 ((b) of Fig. 1) and the second liquid crystal layer with substrate layer that the second liquid crystal layer 22 is formed on the second substrate layer 21 The case where 20 ((c) of Fig. 1), but it's not limited to that.The first liquid crystal layer with substrate layer can be in first base material layer and There is first alignment layer between one liquid crystal layer, the second liquid crystal layer with substrate layer can the second substrate layer and the second liquid crystal layer it Between have second orientation layer.

In the case where the first liquid crystal layer with substrate layer has first alignment layer, the system of circularly polarizing plate of the invention is utilized Making circularly polarizing plate obtained from method can have first alignment layer, can also not have first alignment layer.Have in circularly polarizing plate In the case where having first alignment layer, as long as to make the when removing first base material layer from the layer containing the liquid crystal layer with substrate layer The mode that one oriented layer remains on the first liquid crystal layer adjusts the closing force of each interlayer, does not have first in circularly polarizing plate and takes In the case where layer, as long as first can be taken when removing first base material layer from the layer containing the liquid crystal layer with substrate layer The mode be peeled off together to layer together with first base material layer adjusts the closing force of each interlayer.There is first orientation in circularly polarizing plate In the case where layer, the layer containing liquid crystal layer has first with the polarization plates opposite side of adhesive layer 36 the first liquid crystal layer 12 Oriented layer, the liquid crystal layer with composition layer have first alignment layer between the first liquid crystal layer 12 and adhesive composition layer 30a.It gives With explanation, the inventors of the present invention are confirmed: even if by removing first base material layer from the layer containing the liquid crystal layer with substrate layer And in the case that the exposed surface of the layer containing liquid crystal layer formed is first alignment layer, the compatibility of adhesive composition is also compared The side opposite with first base material layer of first liquid crystal layer is high.It is thus regarded that even if the exposed surface in the layer containing liquid crystal layer is In the case where first alignment layer, also it can will contain liquid crystal layer and forming adhesive composition layer in the first alignment layer Layer is laminated with adhesive composition layer with high closing force.

In the case where the second liquid crystal layer 20 with substrate layer has second orientation layer, circularly polarizing plate can have second and take To layer, can also not have second orientation layer.In the case where the second liquid crystal layer with substrate layer has second orientation layer, as long as In a manner of making second orientation layer remain on the second liquid crystal layer when removing the second substrate layer from the circularly polarizing plate with substrate layer Or the mode that second orientation layer is peeled off together together with the second substrate layer can be adjusted to the closing force of each interlayer.It is inclined in circle In the case that vibration plate includes second orientation layer, second orientation layer is set to the side opposite with adhesive layer of the second liquid crystal layer, and And adhesive composition layer used for optical elements is formed on the second orientation layer.

The closing force of each interlayer can use ingredient contained in each layer, the surface treatment that carries out to the surface of each layer is adjusted It is whole.For example, oriented layer (first alignment layer or second orientation layer) and substrate layer (first base material layer or the second substrate layer) and liquid crystal The closing force of layer (the first liquid crystal layer or the second liquid crystal layer) can use polymerization initiator contained in oriented layer or liquid crystal layer, anti- The type or amount of the additives such as answering property additive, levelling agent, polymerization inhibitor to the surface of the oriented layer side of substrate layer or are arranged in base The surface treatments such as sided corona treatment, corona treatment, the flame treatment that the surface of the oriented layer on material layer carries out adjust.

(variation 2 of embodiment 1)

The example above illustrates using polarization plates 60 and the case where the polarization plates with composition layer 61, still, of the invention It's not limited to that for the manufacturing method of circularly polarizing plate.It can replace polarization plates 60 and the polarization plates 61 with composition layer and use and turn It prints substrate layer and is equipped with the transfer substrate bonding group for being used to form transfer substrate adhesive layer in a face of transfer substrate layer Close the transfer substrate layer with composition layer of nitride layer.Transfer substrate can be with above-mentioned polarization plates adhesive layer with adhesive composition layer 36 are identically formed.

It, can be by first of the first liquid crystal layer with substrate layer in the case where using the transfer substrate layer with composition layer Liquid crystal layer is bonded with the transfer substrate of the transfer substrate layer with composition layer with adhesive composition layer, by transfer substrate bonding group Nitride layer is closed to form transfer substrate adhesive layer and obtain the layer containing the liquid crystal layer with substrate layer.By transfer substrate bonding combination The method that nitride layer forms transfer substrate adhesive layer can form polarization plates with Nian Jie with by polarization plates adhesive composition layer 36a The method of layer 36 is carried out similarly.The resulting layer containing the liquid crystal layer with substrate layer successively includes transfer substrate layer, transfer base Material layer adhesive layer, the first liquid crystal layer and first base material layer.

Next, from containing the liquid crystal layer with substrate layer layer in remove first base material layer and the first of the first liquid crystal layer Substrate layer side forms exposed surface, thus obtains successively comprising transfer substrate layer, transfer substrate layer adhesive layer and the first liquid crystal layer The layer containing liquid crystal layer.It is utilized in the first liquid crystal layer side of the resulting layer containing liquid crystal layer same as the above embodiment After adhesive composition layer is arranged in step, the second liquid crystal layer of the adhesive composition layer and the second liquid crystal layer with substrate layer is pasted It closes.Next, the second substrate layer is removed, in the exposed surface fitting band combination for being formed in the second substrate layer side of the second liquid crystal layer The composition layer of the polarization plates of nitride layer, so as to obtain circularly polarizing plate.In the circularly polarizing plate of this variation, transfer substrate is used Adhesive composition layer can be used as the adhesive composition layer used for optical elements in above embodiment to use, and transfer substrate layer can Using as spacer come using.

So, in the case where the layer containing the liquid crystal layer with substrate layer has transfer substrate layer, in the first liquid crystal The substrate layer side of layer is formed in the process of exposed surface, by removing first base material layer without removing transfer substrate layer, so as to Obtain the layer containing liquid crystal layer.

In this variation, it constitutes the first liquid crystal layer and the phase separation layer of the second liquid crystal layer meets following [a '] or [b] Relationship:

[a '] first liquid crystal layer is quarter wave plate, and the second liquid crystal layer is quarter wave plate,

In above-mentioned [b], it is preferred that above-mentioned first liquid crystal layer is positive c plate, above-mentioned second liquid crystal layer is inverse wave length dispersion The quarter wave plate of property.

[embodiment 2]

Fig. 4~Fig. 5 is the outline for schematically showing an example (embodiment 2) of the manufacturing process of circularly polarizing plate of the invention Cross-sectional view.In figure, W indicates width direction.As shown in (b) of Fig. 5, the circularly polarizing plate obtained from the manufacturing method of the present invention 57 layer structure successively include polarization layer at least one face on formed matcoveredn polarization plates 60 (polarization function layer), partially Vibration plate adhesive layer 31 (polarization function layer adhesive layer), the first liquid crystal layer 12, adhesive layer 34 (adhesive layer) and the second liquid crystal layer 22.As Fig. 5 (a) and (c) shown in, circularly polarizing plate can be in the second liquid crystal layer obtained from the manufacturing method of the present invention 22 side opposite with adhesive layer 34 includes the circularly polarizing plate of the second substrate layer 21 or adhesive composition layer 35 used for optical elements.

In the manufacturing method of circularly polarizing plate 57 shown in (b) of Fig. 5, following process is carried out: preparing in implementation before Also the process ((b) of Fig. 1) of already explained the first liquid crystal layer 10 with substrate layer in mode, first with substrate layer Liquid crystal layer 10 has the composition that the first liquid crystal layer 12 is laminated on first base material layer 11 (substrate layer)；And prepare band substrate layer The second liquid crystal layer 20 process ((c) of Fig. 1), second liquid crystal layer 20 with substrate layer have on the second substrate layer 21 It is laminated with the composition of the second liquid crystal layer 22.As long as the process for preparing the first liquid crystal layer 10 with substrate layer can prepare comprising first The band substrate of substrate layer 11 and the first liquid crystal layer 12 obtained from polymerizeing polymerizable liquid crystal compound on first base material layer 11 First liquid crystal layer 10 of layer, it is possible to have polymerizable liquid crystal compound is polymerize on first base material layer 11 and forms the The process of one liquid crystal layer 12.Similarly, the process for preparing the second liquid crystal layer 20 with substrate layer can have in the second substrate layer The process that polymerizable liquid crystal compound is polymerize on 21 and forms the second liquid crystal layer 22.

Next, to make the first liquid crystal layer 12 and the second liquid crystal layer 22 across the opposite mode laminated belt substrate of adhesive layer 34 The first liquid crystal layer 10 and the second liquid crystal layer 20 with substrate layer of layer and obtain the layer 46 containing the liquid crystal layer with substrate layer and (contain The layer of liquid crystal layer with first base material layer) ((a) of Fig. 4).As shown in (a) of Fig. 4, the layer 46 containing the liquid crystal layer with substrate layer It successively include first base material layer 11, the first liquid crystal layer 12, adhesive layer 34, the second liquid crystal layer 22 and the second substrate layer 21.

Next, being obtained referring to Fig. 4 and Fig. 5 to the layer 46 containing the liquid crystal layer with substrate layer by preparing as described above Method to circularly polarizing plate 57 is illustrated.Firstly, by removing the first base from the layer 46 containing the liquid crystal layer with substrate layer Material layer 11, to obtain successively containing comprising the first liquid crystal layer 12, adhesive layer 34, the second liquid crystal layer 22 and the second substrate layer 21 The layer 47 ((b) of Fig. 4) of liquid crystal layer.

Later, carry out obtaining the layer 48 containing the liquid crystal layer with composition layer (containing the liquid crystal layer with first chamber layer Layer) process ((c) of Fig. 4), the layer 48 containing the liquid crystal layer with composition layer sets on the layer 47 containing liquid crystal layer Have and is used to form polarization plates with the polarization plates of adhesive layer 31 adhesive composition layer 31a (polarization function layer adhesive composition Layer).In the process for obtaining the layer 48 containing the liquid crystal layer with composition layer, as shown in (c) of Fig. 4, from containing liquid crystal layer Layer 47 the layer 46 containing the liquid crystal layer with substrate layer in remove first base material layer 11 and expose the of the first liquid crystal layer 12 In the exposed surface of one substrate layer, 11 side, polarization plates adhesive composition layer 31a is formed.In the inclined of circularly polarizing plate 57 ((b) of Fig. 5) In the case that vibration plate adhesive layer 31 is bonding agent cured layer, polarization plates bonding combination is formed on the layer 47 containing liquid crystal layer The process that the process of nitride layer 31a can have the coating adhesive on the layer 47 containing liquid crystal layer, it is possible to have as needed By the process that the bonding agent after coating is dry.In addition, the polarization plates adhesive layer 31 in circularly polarizing plate 57 ((b) of Fig. 5) is viscous In the case where mixture layer, form polarization plates on the layer 47 containing liquid crystal layer can have with the process of adhesive composition layer 31a The process of coating adhesive, the process for as needed drying the adhesive after coating on the layer 47 containing liquid crystal layer, alternatively, Also it can have and form adhesive phase in the demoulding process face of mold release film and the adhesive phase of mold release film is needed on containing liquid The process of the layer 47 of crystal layer.As shown in (c) of Fig. 4, the layer 48 containing the liquid crystal layer with composition layer is successively used comprising polarization plates Adhesive composition layer 31a, the first liquid crystal layer 12, adhesive layer 34, the second liquid crystal layer 22 and the second substrate layer 21.

Next, carry out will containing the liquid crystal layer with composition layer layer 48 polarization plates with adhesive composition layer 31a with The process ((d) of Fig. 4) that polarization plates 60 are bonded, forms polarization plates adhesive layer 31 by polarization plates adhesive composition layer 31a, obtains To the circularly polarizing plate 56 (circularly polarizing plate) ((a) of Fig. 5) with substrate layer.It is formed as by polarization plates with adhesive composition layer 31a The method of polarization plates adhesive layer 31, as long as select i.e. according to polarization plates ingredient contained in adhesive composition layer 31a Can, for example, can carry out making the cured processing of polarization plates adhesive composition layer 31a, in the feelings of the ingredient without curing process Under condition, polarization plates adhesive layer 31 can be made with adhesive composition layer 31a in polarization plates without particularly handling.Such as figure Shown in 5 (a), the circularly polarizing plate 56 with substrate layer successively includes polarization plates 60, polarization plates adhesive layer 31, the first liquid crystal layer 12, therefore adhesive layer 34, the second liquid crystal layer 22 and the second substrate layer 21 can be circularly polarizing plate obtained in the present invention, and It is the circularly polarizing plate with substrate layer with the second substrate layer 21.

The manufacturing method of circularly polarizing plate 57 may further include: remove the second base from the circularly polarizing plate 56 with substrate layer Second substrate layer of the process ((b) of Fig. 5) of material layer 21 and the second liquid crystal layer 22 exposed in the second substrate layer 21 of removing The exposing surface side of 21 sides forms adhesive composition layer 35 used for optical elements and obtains the (circle of circularly polarizing plate 58 with adhesive composition layer Polarization plates) process ((c) of Fig. 5).As shown in (c) of Fig. 5, the circularly polarizing plate 58 with adhesive composition layer is successively comprising polarization Plate 60, polarization plates adhesive layer 31, the first liquid crystal layer 12, adhesive layer 34, the second liquid crystal layer 22 and bonding used for optical elements combination Therefore nitride layer 35 for circularly polarizing plate obtained in the present invention and can be also the band with adhesive composition layer used for optical elements The circularly polarizing plate of adhesive composition layer.

In the manufacturing method of circularly polarizing plate 57, as shown in (a)~(c) of Fig. 4, in containing from the layer 47 containing liquid crystal layer There is the first base material layer 11 for the first liquid crystal layer 12 removing first base material layer 11 in the layer 46 of the liquid crystal layer with substrate layer and exposing In the exposed surface (hereinafter sometimes referred to as " exposed surface of the layer 47 containing liquid crystal layer ") of side, polarization plates adhesive composition layer is formed 31a.Compared to the side opposite with first base material layer 11 of the first liquid crystal layer 12, polarization plates are more aobvious with adhesive composition layer 31a It shows and the compatibility of the exposed surface of the layer 47 containing liquid crystal layer of the layer 47 containing liquid crystal layer.Therefore, compared in the first liquid The side opposite with first base material layer 11 of crystal layer 12 forms the case where polarization plates are with adhesive composition layer 31a, when containing liquid It, more can be in the layer containing liquid crystal layer in the case where polarization plates are formed in the exposed surface of the layer 47 of crystal layer with adhesive composition layer 31a Polarization plates adhesive composition layer 31a is formed with high closing force on 47.

It is also already explained such in embodiment as in the previous, it is believed that its reason is: on first base material layer 11 Polymerizable liquid crystal compound polymerization (reaction) is formd into the first liquid crystal layer 12, therefore, the exposing of the layer 47 containing liquid crystal layer The surface of the opposite to that side of the surface characteristic in face (side in atmosphere is exposed in the polymerization of polymerizable liquid crystal compound) Characteristic is different, compared with the side opposite with first base material layer 11 of the first liquid crystal layer 12, the exposing of the layer 47 containing liquid crystal layer Face can more inhibit shrinkage cavity and form polarization plates adhesive composition layer 31a.Thus speculate: with first liquid crystal layer 12 and the first base The opposite side of material layer 11 is compared, and the exposed surface of the layer 47 containing liquid crystal layer can more inhibit to be formed on the layer 47 containing liquid crystal layer Polarization plates with adhesive composition layer 31a generate it is uneven and by the layer 47 containing liquid crystal layer and polarization plates adhesive composition layer 31a is laminated with high closing force, also, can more inhibit in circularly polarizing plate 57 generate fold or the layer 47 containing liquid crystal layer with Polarization plates generate bubble between adhesive layer 31, thus by the layer 47 containing liquid crystal layer and the second liquid crystal layer 22 with high closing force layer It is folded.In addition, the circular polarization of good appearance can be obtained due to inhibiting to generate unevenness, fold, bubble in circularly polarizing plate 52 Plate, to be able to suppress visibility reduction when being applied to organic EL display device.

By inference: as also already explained in embodiment before, being coated with when on first base material layer 11 The case where including the liquid crystal layer formation composition of polymerizable liquid crystal compound and levelling agent simultaneously and form the first liquid crystal layer 12 Under, it is easy to make the surface characteristic of 11 side of first base material layer of the first liquid crystal layer 12 and its according to the difference of the amount of levelling agent The difference of the surface characteristic of opposite side becomes larger.It is thus regarded that with the side opposite with first base material layer 11 of the first liquid crystal layer 12 It compares, liquid crystal layer is contained in the side removing first base material layer 11 from the layer 46 containing the liquid crystal layer with substrate layer and exposing The amount of the levelling agent of the exposed surface of layer 47 is less, therefore is easy to inhibit the polarization plates that are formed on the layer 47 containing liquid crystal layer with viscous It meets composition layer 31a and generates unevenness, it can be by the layer 47 containing liquid crystal layer and polarization plates adhesive composition layer 31a with higher Closing force stacking, to obtain the circularly polarizing plate of good appearance.

The first liquid crystal layer 10 with substrate layer, the band substrate layer used in the present embodiment in order to manufacture circularly polarizing plate The second liquid crystal layer 20, polarization plates 60 and the membranoid substance that strip is both preferably using membranoid substances such as sandwich obtained from them, It is preferred that carrying out each process while continuously transporting them.Width direction W is the side orthogonal with the length direction of membranoid substance To.

The manufacturing method of the circularly polarizing plate of present embodiment can variation as shown below change like that.Separately Outside, can by above-mentioned embodiment and it is following shown in variation arbitrarily combine.

(variation of embodiment 2)

In the same manner as embodiment before, in the present embodiment, the first liquid crystal layer with substrate layer can also be There is first alignment layer, the second liquid crystal layer with substrate layer can also be in the second substrate layer between one substrate layer and the first liquid crystal layer There is second orientation layer between the second liquid crystal layer.There is the explanation of the case where first alignment layer, second orientation layer, such as exist Shown in explanation in the variation of embodiment before, therefore omit its description.

(embodiment 3)

It is successively comprising at least containing in addition, further including a kind of manufacturing method of circularly polarizing plate in the scope of the application There are the manufacturing method of the circularly polarizing plate of the polarization function layer of linear polarization layer, polarization function layer adhesive layer and liquid crystal layer, packet It includes:

Prepare the process of the liquid crystal layer with substrate layer, the liquid crystal layer with substrate layer has on first base material layer by wrapping The liquid crystal layer that composition containing polymerizable liquid crystal compound is formed；

The process of first base material layer is removed from the liquid crystal layer with substrate layer；

It is coated with adhesive composition in the release surface formed by removing first base material layer and makes its solidification, to be arranged The process of polarization function layer adhesive layer；And

Polarization function layer is fitted in the process of the polarization function layer adhesive layer formed in the release surface.

In the present embodiment, liquid crystal layer can be the first above-mentioned liquid crystal layer, or the second liquid crystal layer.

In the case that the liquid crystal layer of circularly polarizing plate in the present embodiment is the first liquid crystal layer, the can be further included Two liquid crystal layers.In the case that circularly polarizing plate in the present embodiment further includes the second liquid crystal layer, successively comprising above-mentioned inclined Shake functional layer, polarization function layer adhesive layer, the first liquid crystal layer and the second liquid crystal layer.

Above-mentioned the first liquid crystal layer with substrate layer can be above-mentioned the first liquid crystal layer with first base material layer, or First liquid crystal layer of above-mentioned the second substrate layer of band.

Composition comprising polymerizable liquid crystal compound preferably also includes levelling agent.

Polarization function layer, polarization function layer adhesive layer, the first liquid crystal layer, the second liquid crystal layer in present embodiment, with And levelling agent and each process can similarly be constituted for embodiment preceding therewith.

More than, embodiments of the present invention and its variation are illustrated, but the present invention is not implemented by these The restriction of mode and its variation, for example, it is also possible to by each structure and each process of above-mentioned each embodiment and its variation Combination is to implement.Hereinafter, each item general in whole embodiments and its variation is described in detail.

(circularly polarizing plate obtained from the manufacturing method of the present invention)

In circularly polarizing plate 57 shown in (b) of circularly polarizing plate 52 and Fig. 5 shown in (b) of Fig. 3, polarization plates 60 are straight line Polarization plates, the first liquid crystal layer 12 are 1/2 wave plate, and the second liquid crystal layer 22 is quarter wave plate.In addition, polarization plates 60 are linear polarization plate, First liquid crystal layer 12 is the quarter wave plate of inverse wave length dispersibility, and the second liquid crystal layer 22 is positive c plate, alternatively, the first liquid crystal layer 12 is positive C plate, the second liquid crystal layer 22 are the quarter wave plate of inverse wave length dispersibility.

(polarization function layer)

As polarization function layer, can be used polarization layer, polarization layer at least single side formed matcoveredn polarization plates, The polarization plates with protecting film of protecting film are laminated in at least single side of polarization plates.Alternatively, it is also possible on polarization layer or partially There is reflectance coating, semi-transmission type reflectance coating, optical compensation films, the film with anti-dazzle function, a kind of function in phase difference film on vibration plate The polarization function layer of film, or the multilayered structure with two or more functional membrane.In addition, contained in polarization function layer partially Vibration layer can be liquid crystal layer, the polarization layer (aftermentioned) i.e., using polymerizable liquid crystal compound formed.In the present specification, " partially Vibration layer " refer to make in the light incidence for making no polarization with the vibration plane orthogonal with absorption axiss rectilinearly polarized light penetrate this The linear polarization layer of one property.

(linear polarization layer (polarization layer))

As polarization layer contained in polarization function layer, preferably adsorbed on the film after being orientated polyvinyl alcohol resin film Orientation has the polarization layer of the dichroism pigments such as iodine.Polarization layer can be in the polyvinyl alcohol resin film (polyvinyl alcohol resin of single layer Polyvinyl alcohol molecule contained in film be orientated after film) on gas absorption quantity have the polarization layer of dichroism pigment, or The stacked film that gas absorption quantity there are two layers or more obtained by the polyvinyl alcohol resin layer of dichroism pigment is equipped on base material film.In this way Polarization layer can use various methods well known in the art to manufacture.

(polarization plates)

Polarization function layer can be polarization plates.For typical case, polarization plates are in dichroism pigment gas absorption quantity in polyethylene Polarization plates made of protective layer (protective film) are bonded on the single or double of the polarization layer of this form of alcohol resin film.As the guarantor The protection formed by the excellent resin material such as the transparency, mechanical strength, thermal stability, draftability can be used for example in sheath Layer.Specifically, can enumerate: the polyolefin-based resins such as polyethylene, polypropylene；The cyclic polyolefins hydrocarbon system such as norbornene-based polymer Resin；The polyester based resins such as polyethylene terephthalate, polyethylene naphthalate；(methyl) acrylic acid, poly- (first Base) (methyl) acrylic resin such as methyl acrylate；Tri acetyl cellulose, diacetyl cellulose and cellulose acetate propionate The cellulose esters such as element system resin；The vinyl alcohol resins such as polyvinyl alcohol and polyvinyl acetate；Polycarbonate-based resin；Polyphenyl second Alkene system resin；Polyarylate system resin；Polysulfones system resin；Polyether sulfone system resin；Polyamide resin；Polyimides system resins；It is poly- Ether ketone system resin；Polyphenylene sulfide system resin；Polyphony Ether resin and their mixture, copolymer etc..In these resins In, it is preferable to use in cyclic polyolefin hydrocarbon system resin, polyester based resin, cellulose esters system resin and (methyl) acrylic resin The mixture of any one or they.It is explained, above-mentioned " (methyl) acrylic acid " refers to " in acrylic acid and methacrylic acid extremely It is a kind few ".

Protective layer can be the single layer for being mixed to get one kind or two or more resin material, it is possible to have 2 layers or more Multilayered structure.In situation with multi-layer structure, the resin for constituting each layer can be identical or different each other.It is in protective layer In the case where the film formed by resin material, arbitrary additive can be added in protective layer.As additive, example can be enumerated As ultraviolet absorbing agent, antioxidant, lubricant, plasticizer, release agent, anti-coloring agent, fire retardant, nucleating agent, antistatic agent, Pigment and colorant etc..

Dichroism pigment gas absorption quantity in the thickness of the polarization layer of polyvinyl alcohol resin film this form be preferably 20 μm with Under, further preferably 10 μm or less.

Polarization function layer possessed by circularly polarizing plate of the invention particularly preferably only has protection in the single-sided lamination of polarization layer The polarization function layer (hereinafter referred to as " single side protection polarization plates ") of layer.As described above, the first liquid crystal layer and the second liquid crystal layer are served as reasons The liquid crystal layer that polymerizable liquid crystal compound is formed, is the liquid crystal layer of very thin films.If linear polarization plate is that single side protects polarization plates, Its thickness is thin, and therefore, the thickness of circularly polarizing plate of the invention can be thinned in result.Thus, for example, having circle of the invention In the case that the organic EL display device of polarization plates is the flexible organic EL display device that can be bent or wind etc., it is not easy to curved Folding or winding etc. affect, and are extremely advantageous.Single side protects the thickness of the protective layer in polarization plates can be according to polarization layer The thickness of itself optimizes, in order to ensure the good flexibility of circularly polarizing plate of the invention, thickness be preferably 50 μm hereinafter, Further preferably 30 μm or less.

It is inclined that the protection of single side disclosed in such as JP2016-122025 bulletin can be used in above-mentioned single side protection polarization plates Vibration plate.

As described above, polarization layer contained in the polarization function layer possessed by circularly polarizing plate of the invention can be to make two The cured film that color pigment is oriented in polymerizable liquid crystal compound and polymerize polymerizable liquid crystal compound.At this time inclined The layer that shakes can include usually polymerizable liquid crystal compound by applying on substrate layer or the oriented layer being set on the substrate layer And dichroism pigment composition and make it dry, recycle ultraviolet light isoreactivity energy-ray irradiation and make institute in coated film The polymerizable liquid crystal compound contained polymerize and solidifies to obtain.The laminated body of the substrate and polarization layer (cured film) that obtain in this way can Using as single side protection polarization plates come using.

The thickness for being used to form the substrate layer of above-mentioned cured film is not particularly limited, it is however generally that, from intensity, treatability etc. The aspect of operability is set out, preferably 1~300 μm, more preferably 10~200 μm, further preferably 30~120 μm.

(first base material layer and the second substrate layer)

First base material layer and the second substrate layer (the two is referred to as " substrate layer " sometimes below) are preferably by resin material The film of formation.The resin material is also identical as the material of protective film for forming above-mentioned polarization plates, and the transparency, machine can be used for example The excellent resin material such as tool intensity, thermal stability, draftability.The typical case and preference of resin material can be used as inclined The protective layer of vibration plate and the resin material illustrated.

Substrate layer can be the single layer for being mixed to get one kind or two or more resin material, it is possible to have 2 layers or more Multilayered structure.In situation with multi-layer structure, the resin material for constituting each layer can be identical or different each other.In substrate In the case that layer is the film formed by resin material, arbitrary additive can be added in substrate layer.As additive, can arrange Citing as ultraviolet absorbing agent, antioxidant, lubricant, plasticizer, release agent, anti-coloring agent, fire retardant, nucleating agent, resist it is quiet Electric agent, pigment and colorant etc..

The thickness for being used to form the substrate layer of liquid crystal layer is not particularly limited, it is however generally that, it is operated from intensity, treatability etc. It sets out in terms of property, preferably 1~300 μm, more preferably 10~200 μm, further preferably 30~120 μm.

(first alignment layer and second orientation layer)

The two (is referred to as " orientation sometimes below by the first alignment layer and second orientation layer that circularly polarizing plate may include Layer ") there is polymerizable liquid crystal compound contained in the liquid crystal layer for making to be formed on to carry out liquid crystal aligning towards desired orientation Orientation control force.As oriented layer, the orientation polymeric layer formed by orientation polymer can be enumerated, polymerize by light orientation The light orientation polymeric layer of object formation, the groove orientation layer in layer surface with relief pattern or multiple grooves (groove). The thickness of oriented layer is usually 10~500nm, preferably 10~200nm.

Orientation polymeric layer can be by being coated on substrate for the composition for being dissolved with orientation polymer in a solvent Layer simultaneously removes solvent, is formed further according to needing to carry out friction treatment.In this case, for being formed by orientation polymer For orientation polymeric layer, arbitrarily direction of adjustment is controlled for the surface state or friction condition that can use orientation polymer Power.

Light orientation polymeric layer can be by that will include polymer with photoreactive group or monomer and solvent Composition be coated on substrate layer and irradiate polarised light to be formed.In this case, for light orientation polymeric layer and Speech can use for the arbitrarily direction of adjustment control force such as polarizing light irradiation condition of light orientation polymer.

Groove orientation layer can use such as following methods to be formed: in photosensitive polyimide film surface across with figure The exposure mask of the slit of case shape is exposed, develops etc. and the method that forms relief pattern；Have on surface fluted The uncured layer of active energy ray-curable resin is formed on the motherboard of plate, then the layer is needed on substrate layer and is carried out Cured method；The uncured layer of active energy ray-curable resin is formed on substrate layer, then by that there will be bumps The motherboard of roll be pressed against the layer etc. to form bumps and make its cured method etc..

(the first liquid crystal layer and the second liquid crystal layer)

First liquid crystal layer and the second liquid crystal layer (the two is referred to as " liquid crystal layer " sometimes below) are using polymerism liquid Brilliant compound and well known polymerizable liquid crystal compound can be used in the liquid crystal layer formed, the polymerizable liquid crystal compound.Polymerization The type of property liquid-crystal compounds is not particularly limited, can be used Rod-like liquid crystal compound, disc-like liquid crystal compound and they Mixture.Here, the preferred rod shaped liquid crystal chemical combination of the polymerizable liquid crystal compound for being used to form the quarter wave plate of inverse wave length dispersibility The polymerizable liquid crystal compound recorded in object, such as Japanese Unexamined Patent Publication 2011-207765 bulletin.Using such polymerism liquid It, can be by that will include polymerizable liquid crystal compound, solvent and various additives as needed in the case where brilliant compound Liquid crystal layer formation is coated in oriented layer with composition and forms film, then makes the curing of coating to be formed as liquid crystal cured layer Liquid crystal layer.Alternatively, can by substrate layer coating liquid crystal layer formation with composition and formed film, again by the film with Substrate layer is stretched together to form liquid crystal layer.Liquid crystal layer can be phase separation layer.

Liquid crystal layer is formed in composition, can be with other than comprising above-mentioned polymerizable liquid crystal compound and solvent Include polymerization initiator, reactive additive, levelling agent, polymerization inhibitor etc..Polymerizable liquid crystal compound, solvent, polymerization initiator, Reactive additive, levelling agent, polymerization inhibitor etc. can be properly used well known substance.As liquid crystal layer formation composition and liquid The levelling agent that may include in crystal layer, it can be mentioned, for example with organically-modified silicone oil be main ingredient levelling agent, with polyacrylate Compound is the levelling agent of principal component, using the fluorine-containing atomic compound such as perfluoro alkane as levelling agent of principal component etc..Here, it is main at Divide the ingredient for referring to that use level is most in the whole components contained by levelling agent.As levelling agent, it is preferable to use among above-mentioned with Polyacrylic acid ester compounds are the levelling agent of main ingredient, using the fluorine-containing atomic compound such as perfluoro alkane as the levelling agent of principal component. Liquid crystal layer formation with the content of the levelling agent in composition relative to 100 mass parts of polymerizable liquid crystal compound be preferably 0.01~ 5 mass parts, more preferably 0.1 mass parts~3 mass parts.

As noted above, in circularly polarizing plate of the invention, the first liquid crystal layer preferably comprises levelling agent, therefore, is used for shape At the first liquid crystal layer liquid crystal layer formation with composition be preferably include levelling agent liquid crystal layer formation composition.

(adhesive layer)

Adhesive layer is to be arranged between the first liquid crystal layer and the second liquid crystal layer and make to be bonded this 2 liquid crystal layers Adhesive layer.Adhesive layer can directly be contacted with the first liquid crystal layer and the second liquid crystal layer, can also on the first liquid crystal layer The first alignment layer of setting, the second orientation layer being arranged on the second liquid crystal layer directly contact.

Adhesive layer can be formed by bonding agent, adhesive and their combination, usually 1 layer, or 2 layers with On.In the case where adhesive layer includes 2 layers or more of layer, each layer can be formed by identical material each other, can also be by difference Material formed.

As bonding agent, such as can will be in water system bonding agent, active energy ray curable bonding agent, adhesive etc. One kind or two or more combination is to form.As water system bonding agent, it can be mentioned, for example polyvinyl alcohol resin aqueous solutions, two liquid of water system Type polyurethane system emulsion adhesive etc..As active energy ray curable bonding agent, for by irradiating ultraviolet light isoreactivity energy Ray and cured bonding agent are measured, it can be mentioned, for example the active energy beams comprising polymerizable compound and optical polymerism initiator Curing type bonding agent, the active energy ray curable bonding agent comprising light reactive resin include that binder resin and light are anti- Active energy ray curable bonding agent of answering property crosslinking agent etc..It as above-mentioned polymerizable compound, can enumerate: photo-curable ring The photopolymerization monomers such as oxygen system monomer, light-curable acrylic system monomer, photo-curable polyurethane series monomer；From these monomers Oligomer etc..As above-mentioned Photoepolymerizationinitiater initiater, can enumerate comprising being generated by irradiating ultraviolet light isoreactivity energy-ray Neutral radical, radical anion, reactive species as radical cation substance Photoepolymerizationinitiater initiater.

As adhesive, can enumerate based on (methyl) acrylic resin, phenylethylene resin series, silicone-based resin etc. Polymer and the composition that joined the crosslinking agents such as isocyanate compound, epoxide, aziridine cpd.

It is preferable to use active energy ray curable bonding agents for adhesive layer to be formed, and particularly preferred use is solid comprising ultraviolet light The epoxy monomer for the property changed and the bonding agent of light cationic polymerization initiator are formed.

Can the surface to the layer that will form adhesive layer carry out sided corona treatment, corona treatment, flame as needed The surface treatment such as processing.

Adhesive layer is preferably bonding agent cured layer.In which case it is preferable that adhesive composition layer is to use bonding agent And the layer formed, bonding agent are ultra-violet solidified bonding agent isoreactivity energy ray-curable bonding agent.By making adhesive layer For bonding agent cured layer, when circularly polarizing plate is applied to flexible organic EL display device etc., even if with flexible organic EL Bending or the winding of display device and by circularly polarizing plate bend or wind when, also be easy inhibit in the first liquid crystal layer and the second liquid crystal Fold is generated between layer.

More than, the bonding agent and adhesive that form adhesive layer are illustrated, still, in circularly polarizing plate of the invention In, the adhesive layer for the first liquid crystal layer to be bonded with the second liquid crystal layer is preferably the bonding agent solidification for using bonding agent and being formed Layer.

(polarization plates adhesive layer)

Polarization plates can be formed with adhesive layer by bonding agent, adhesive and their combination, usually 1 layer, can also be with It is 2 layers or more.In the case where the polarization plates layer that adhesive layer includes 2 layers or more, each layer can be by identical material shape each other At can also be formed from different materials.As the bonding agent and adhesive for being used to form polarization plates adhesive layer, can enumerate with Bonding agent used in above-mentioned adhesive layer and the same bonding agent of adhesive and adhesive.It can use polarization plates will be formed The surface of the layer of adhesive layer carries out the surface treatment such as sided corona treatment, corona treatment, flame treatment as needed.

(adhesive composition layer used for optical elements)

Adhesive composition layer used for optical elements can be formed by bonding agent, adhesive and their combination, and usually 1 Layer, or 2 layers or more.In the case where adhesive composition layer used for optical elements includes 2 layers or more of layer, each layer can be by Identical material is formed each other, can also be formed from different materials.As the viscous of composition adhesive composition layer used for optical elements Agent and adhesive are connect, bonding agent same as bonding agent used in above-mentioned adhesive layer and adhesive and adhesive can be enumerated.Light Learning element, it is preferable to use adhesive is formed with adhesive composition layer.It can be to adhesive composition layer used for optical elements will be formed Layer surface carry out as needed sided corona treatment, corona treatment, flame treatment etc. surface treatment.Bonding used for optical elements Composition layer is preferably the adhesive phase for using adhesive and being formed.

Embodiment

The present invention is further illustrated hereinafter, showing Examples and Comparative Examples, still, the present invention is not by these The restriction of example." % " and " part " in embodiment is recorded as long as no special, then is quality % and mass parts.

[preparation of adhesive composition]

After cation-curable ingredient a1~a3 shown in will be following and cationic polymerization initiators mix, further mix Cationic polymerization initiators and sensitizer shown in following carry out deaeration, are prepared into the adhesive composition of light-cured type.It is said Bright, following use levels are based on solid content.

Cation-curable ingredient a1 (70 parts):

3 ', 4 '-epoxycyclohexyl-methyls -3 ', 4 '-epoxycyclohexane carboxylates (trade name: CEL2021P, Co., Ltd. Daicel system)

Cation-curable ingredient a2 (20 parts):

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

Cation-curable ingredient a3 (10 parts):

2- ethylhexyl 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

(comparative example 1)

(light redirecting layer forms the preparation for using composition)

Following ingredients is mixed, and gained mixture is stirred 1 hour at 80 DEG C of temperature, thus obtains light redirecting layer Formation composition.

Light orientation material (5 parts):

Solvent (95 parts): cyclopentanone

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

Following ingredients is mixed, and resulting mixture is stirred 1 hour at 80 DEG C, liquid crystal layer is thus obtained and is formed With composition (A).Polymerizable liquid crystal compound A1 can use the compound recorded in Japanese Unexamined Patent Publication 2011-207765 bulletin (A11-1) synthetic method synthesizes.Polymerizable liquid crystal compound A2 can use in Japanese Unexamined Patent Publication 2010-31223 bulletin The synthetic method of the compound (x-1) of record synthesizes.

Polymerizable liquid crystal compound A1 (80 parts):

Polymerizable liquid crystal compound A2 (20 parts):

Polymerization initiator (6 parts):

2- dimethylamino -2- benzyl -1- (4- morphlinophenyl) butane -1- ketone (Irgacure 369；Ciba Specialty Chemicals corporation)

Levelling agent (0.1 part):

Polyacrylic acid ester compounds (BYK-361N；BYK-Chemie corporation)

Solvent (400 parts): cyclopentanone

(manufactures of polarization plates)

The method recorded in embodiment according to Japanese Unexamined Patent Publication 2016-122025 bulletin, manufacture single-sided lamination have protection The polarization plates (single side protection polarization plates) of film.

(manufacture of the first liquid crystal layer (1) with substrate layer)

Use 100 μm of thickness of polyethylene terephthalate (PET) film as substrate layer, uses corona treatment plant (AGF-B10, Kasuga Electric K. K.'s system) is to the PET film under conditions of output power 0.3kW, processing speed 3m/ minutes Carry out 1 processing.Light redirecting layer formation composition is coated on the surface for implemented sided corona treatment using bar coater, at 80 DEG C Lower drying 1 minute uses polarized UV radiation device (SPOT CURE SP-7；USHIO Electric Co., Ltd system), with 100mJ/ cm²Accumulated light implement polarization UV exposure, obtain light redirecting layer.The thickness of gained light redirecting layer is utilized into laser microscope (LEXT, Olympus Co., Ltd's system) is determined, result 100nm.

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

The first liquid crystal layer (1) for gained with substrate layer, it is above-mentioned in the side coating opposite with substrate layer of liquid crystal layer Adhesive composition, and visually to observe coated face, as a result observe shrinkage cavity.

It is thus regarded that: if pasted by the adhesive layer (adhesive composition on the first liquid crystal layer (1)) of shrinkage cavity is observed It closes single side and protects polarization plates, then gained circularly polarizing plate is observed the abnormal appearance based on the shrinkage cavity.

(embodiment 1)

The first liquid crystal layer (1) with substrate layer is obtained using the step same as comparative example 1.By gained with substrate layer The liquid crystal layer side of one liquid crystal layer (1) is fitted in by 5 μm of thickness of sheet adhesive (LINTEC Co. Ltd. system, " NCF#L2 ") After glass substrate (alkali-free glass " Eagle XG ", the thickness 0.2mm of Corning Incorporated), peeling base layer obtains band glass base The liquid crystal layer of plate.Only peeling base layer, light redirecting layer are not peeled off and remain.In the release surface of the liquid crystal layer with glass substrate Be coated with above-mentioned adhesive composition, and visually to observe coated face, as a result with observed in comparative example 1 in first with substrate layer The coated face that the liquid crystal layer side of liquid crystal layer (1) is coated with adhesive composition is less compared to shrinkage cavity.

In conclusion if release surface setting adhesive composition layer on the first liquid crystal layer (1) after peeling base layer, again Polarization function layer (such as single side protection polarization plates) are bonded on the adhesive composition layer, then the circle of available excellent appearance is inclined Vibration plate.

According to embodiment 1 and the result of comparative example 1, it is believed that: the peeling base layer from the first liquid crystal layer (1) with substrate layer And the surface exposed is since shrinkage cavity is few, and it is high to the compatibility of adhesive composition, have when forming adhesive composition layer excellent Different closing force.

(comparative example 2)

(oriented layer forms the preparation for using composition)

Add in the Sunever SE-610 (Nissan Chemical Ind Ltd's system) as commercially available orientation polymer Enter butoxy ethanol, obtains oriented layer formation composition.In resulting oriented layer formation composition, solid component phase Content ratio for the composition total amount is 1%, and solvent is 99% relative to the content ratio of the composition total amount. The solid content of Sunever SE-610 is converted by the concentration recorded in delivery specifications.

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

Following ingredient is mixed, and after resulting mixture is stirred 1 hour at 80 DEG C, is cooled to room temperature, obtains Liquid crystal layer, which is formed, uses composition (B).

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

Polymerization initiator (0.5%):

Irgacure (registered trademark) 907 (BASF JAPAN corporation)

Levelling agent (0.1%):

BYK361N (BYK-CHEMIE JAPAN system)

Reaction additives (1.1%):

Laromer (registered trademark) LR-9000 (BASF JAPAN corporation)

Solvent (79.1%): propylene glycol 1- monomethyl ether -2- acetate

Using corona treatment plant (AGF-B10, Kasuga Electric K. K.'s system) by 38 μm of thickness of poly terephthalic acid Glycol ester (PET) film carries out 1 processing under conditions of output power 0.3kW, processing speed 3m/ minutes.Use bar coater Oriented layer formation composition is coated on the surface for implemented sided corona treatment, it is 1 minute dry at 90 DEG C, obtain oriented layer. The thickness of gained oriented layer is determined, result 34nm with laser microscope (LEXT, Olympus Co., Ltd's system).

Next, coating liquid crystal layer formation is with composition (B) in oriented layer using bar coater, 1 point of the drying at 90 DEG C Zhong Hou irradiates ultraviolet light (nitrogen gas using high-pressure sodium lamp (Unicure VB-15201BY-A, USHIO Electric Co., Ltd system) Under atmosphere, wavelength: 365nm, the accumulated light at wavelength 365nm: 1000mJ/cm²), the liquid as phase separation layer is consequently formed Crystal layer obtains the first liquid crystal layer (2) with substrate layer.Liquid crystal layer with a thickness of 1 μm.

The first liquid crystal layer (2) to gained with substrate layer, it is above-mentioned viscous in the side coating opposite with substrate layer of liquid crystal layer Composition is connect, and visually to observe coated face, as a result observes shrinkage cavity.

It is thus regarded that: if pasted by the adhesive layer (adhesive composition on the first liquid crystal layer (2)) of shrinkage cavity is observed It closes single side and protects polarization plates, then gained circularly polarizing plate is observed the abnormal appearance based on the shrinkage cavity.

(embodiment 2)

The first liquid crystal layer (2) with substrate layer is obtained using the step same as comparative example 2.By gained with substrate layer The liquid crystal layer side of one liquid crystal layer (2) is fitted in by 5 μm of thickness of sheet adhesive (LINTEC Co. Ltd. system, " NCF#L2 ") After glass substrate (alkali-free glass " Eagle XG ", the thickness 0.2mm of Corning Incorporated), peeling base layer obtains band glass base The liquid crystal layer of plate.While peeling base layer, oriented layer has also been removed.Visually to observe in the liquid crystal layer with glass substrate The removing side of substrate layer of liquid crystal layer be coated with the coated face of above-mentioned adhesive composition, as a result with observed in comparative example 2 It is less compared to shrinkage cavity in the coated face that the liquid crystal layer side of the first liquid crystal layer (2) with substrate layer is coated with adhesive composition.

In conclusion if release surface setting adhesive composition layer on the first liquid crystal layer (2) after peeling base layer, Polarization function layer (such as single side protection polarization plates) are bonded on the adhesive composition layer again, then the circle of available excellent appearance Polarization plates.

According to embodiment 2 and the result of comparative example 2, it is believed that: the peeling base layer from the first liquid crystal layer (2) with substrate layer And the surface exposed is since shrinkage cavity is few, and it is high to the compatibility of adhesive composition, have when forming adhesive composition layer excellent Different closing force.

Claims

1. a kind of manufacturing method of circularly polarizing plate is successively comprising at least polarization function layer containing linear polarization layer, polarization Functional layer adhesive layer, the first liquid crystal layer, adhesive layer and the second liquid crystal layer circularly polarizing plate manufacturing method comprising:

Prepare the process of the layer containing the liquid crystal layer with first base material layer, the layer containing the liquid crystal layer with first base material layer exists First liquid crystal layer side of the first liquid crystal layer with substrate layer with first base material layer and first liquid crystal layer successively has There are the adhesive layer, second liquid crystal layer and the second substrate layer；

The first base material layer is removed from the layer containing the liquid crystal layer with first base material layer and in first liquid crystal layer First base material layer side formed exposed surface process；

The process for obtaining the layer containing the liquid crystal layer with first chamber layer, it is described containing the liquid crystal layer with first chamber layer Layer is equipped with the polarization function layer adhesive composition layer for being used to form the polarization function layer adhesive layer in the exposed surface； And

It is bonded in the polarization function layer of the layer containing the liquid crystal layer with first chamber layer on adhesive composition layer The process of the polarization function layer,

First liquid crystal layer is liquid crystal layer obtained from polymerizeing polymerizable liquid crystal compound on the first base material layer,

First liquid crystal layer and second liquid crystal layer meet the relationship of following [a] or [b]:

[a] described first liquid crystal layer is 1/2 wave plate, and second liquid crystal layer is quarter wave plate,

One of [b] described first liquid crystal layer and second liquid crystal layer are the quarter wave plate of inverse wave length dispersibility, and another one is Positive c plate.

2. a kind of manufacturing method of circularly polarizing plate is successively comprising at least polarization function layer containing linear polarization layer, polarization Functional layer adhesive layer, the first liquid crystal layer, adhesive layer and the second liquid crystal layer circularly polarizing plate manufacturing method comprising:

Prepare the process of the layer of the liquid crystal layer containing the second substrate layer of band, the layer of the liquid crystal layer containing the second substrate layer of band according to It is secondary have the polarization function layer, the polarization function layer adhesive layer and from polarization function layer adhesive layer side successively The first liquid crystal layer with substrate layer with first liquid crystal layer and first base material layer；

The first base material layer is removed from the layer of the liquid crystal layer containing the second substrate layer of band and in first liquid crystal layer First base material layer side formed exposed surface process；

The process for obtaining the layer containing the liquid crystal layer with second chamber layer, it is described containing the liquid crystal layer with second chamber layer Layer is equipped with the adhesive composition layer for being used to form the adhesive layer in the exposed surface；And

By second liquid crystal layer side with the second substrate layer and the second liquid crystal layer with substrate layer of second liquid crystal layer The process being fitted on the adhesive composition layer of the layer containing the liquid crystal layer with second chamber layer,

3. the manufacturing method of circularly polarizing plate according to claim 2, wherein the liquid of the preparation containing the second substrate layer of band The process of the layer of crystal layer includes:

Prepare the process of the polarization function layer with composition layer, the polarization function layer with composition layer is in the polarization function Layer is equipped with the polarization function layer adhesive composition layer for being used to form the polarization function layer adhesive layer；And

First liquid crystal layer side of first liquid crystal layer with substrate layer is fitted in the polarization function layer with composition layer The process of the polarization function layer on adhesive composition layer.

4. the manufacturing method of circularly polarizing plate described in any one of claim 1 to 3, wherein with substrate layer One liquid crystal layer includes first alignment layer between first liquid crystal layer and the first base material layer,

The process for forming exposed surface is peeled off together the first alignment layer together with the first base material layer.

5. the manufacturing method of circularly polarizing plate according to claim 1, wherein first liquid crystal layer with substrate layer is in institute Stating includes first alignment layer between the first liquid crystal layer and the first base material layer,

The layer containing the liquid crystal layer with first chamber layer is in first liquid crystal layer and the polarization function layer with Nian Jie There is the first alignment layer between composition layer.

6. the manufacturing method of circularly polarizing plate according to claim 2 or 3, wherein first liquid crystal layer with substrate layer It include first alignment layer between first liquid crystal layer and the first base material layer,

The layer containing the liquid crystal layer with second chamber layer is between first liquid crystal layer and the adhesive composition layer With the first alignment layer.

7. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 6, wherein the first liquid crystal layer packet Containing levelling agent.

8. the manufacturing method of circularly polarizing plate according to any one of claims 1 to 7, wherein the adhesive layer is bonding Agent cured layer or adhesive phase.

9. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 8, wherein the adhesive layer is bonding Agent cured layer,

The adhesive composition layer for being used to form the adhesive layer includes active energy ray curable bonding agent.

10. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 9, wherein first liquid crystal layer is 1/2 wave plate, second liquid crystal layer are quarter wave plate.

11. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 9, wherein first liquid crystal layer is The quarter wave plate of inverse wave length dispersibility, second liquid crystal layer are positive c plate.

12. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 11, wherein the polarization function layer It is bonding agent cured layer or adhesive phase with adhesive layer.

13. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 12, wherein second liquid crystal layer For liquid crystal layer obtained from polymerizeing polymerizable liquid crystal compound on second substrate layer.

14. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 13 comprising in the work of the fitting The process for removing second substrate layer after sequence.

15. the manufacturing method of circularly polarizing plate described according to claim 1~any one of 14, wherein the polarization function layer For the polarization plates at least one face of the linear polarization layer including protective layer.