CN106468797A - Polarization plates for curved surface image display panel - Google Patents
Polarization plates for curved surface image display panel Download PDFInfo
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- CN106468797A CN106468797A CN201610682019.8A CN201610682019A CN106468797A CN 106468797 A CN106468797 A CN 106468797A CN 201610682019 A CN201610682019 A CN 201610682019A CN 106468797 A CN106468797 A CN 106468797A
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- polarization plates
- curved surface
- image display
- display panel
- film
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
It is an object of the invention to, provide a kind of polarization plates for curved surface image display panel, even if through the stripping using the display floater that also can suppress from curved surface state under long-term use and/or hot environment, floating.A kind of polarization plates, it is the polarization plates for the cross-directional length under mean radius of curvature R, the curved surface image display panel of thickness H and flat state for L1, when it fits in curved surface image display panel, polarization plate thickness H1 (mm) becoming concave side meets following formula (1)：L1(H+H1)/2R≤0.4 (1).
Description
Technical field
The present invention relates to polarization plates and the surface chart picture comprising this polarization plates for curved surface image display panel show
Panel.
Background technology
In the past, as in various picture display faces such as display panels, organic electroluminescent (organic EL) display floaters
Polarization plates used in plate are it is known that have the polarization plates of following composition：Polyvinyl alcohol resin orientation on membranes be adsorbed with iodine or
On the single or double of polarizing coating of the dichroism pigment such as dichroic dye, it is laminated with TAC via adhesive linkage
The protecting film (such as patent documentation 1～3) of plain film etc.Such polarization plates are as needed further to be laminated with phase contrast
The form of the various optical layers such as film, optical compensation films is bonded to the image-displaying members such as liquid crystal cell, organic EL display element, from
And constitute image display panel.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 2010-211196 publication
Patent documentation 2：Japanese Unexamined Patent Publication 10-062624 publication
Patent documentation 3：Japanese Unexamined Patent Publication 07-134212 publication
Content of the invention
Problems to be solved by the invention
In recent years, from the viewpoint of aesthetic appearance, carried out the research of the image display device with regard to various shape.
Wherein, can get in picture because the distance from spectators to center Screen is little with the difference of the distance from spectators to side end
Immersion sense, the concern to the curved surface image display device such as curved surface LCD TV improves, and is carrying out various products exploitation.
Curved surface image display device is also needed in the same manner as planar image display use polarization plates, but in order to
Manufacture curved surface image display device and the conventional polarization plates disclosed in above-mentioned patent documentation 1～3 are used for curved face display panel
In the case of, elapse over time, it is possible to produce polarization plates from the stripping of curved face display panel or float.In curved-surface display face
In plate, the stripping of polarization plates, float and especially easily produce in concave side (viewing side), lead to the display in viewing areas bad.
In addition, polarization plates occur from the stripping of curved face display panel or float and become especially notable in high temperature environments.Therefore, due to
Life-time service etc. and in the case of being exposed to the heat of long-time light source, in the easy transport forming high temperature and humidity environment and
According to the region using, have and more serious stripping, the probability floating occur.
Therefore, it is an object of the invention to, solve distinctive in the polarization plates for curved surface image display panel may send out
Raw above-mentioned problem, provides a kind of polarization plates for curved surface image display panel, even if through long-term use and/or high temperature ring
Under border using the stripping of display floater that also can suppress from curved surface state, float.
Means for solving the problem
The present invention provides following preferred version [1]～[8].
[1] a kind of polarization plates, its be for mean radius of curvature R (mm), the curved surface image display panel of thickness H (mm) and
Cross-directional length under flat state is the polarization plates of L1 (mm),
When fitting in curved surface image display panel, polarization plate thickness H1 (mm) becoming concave side meets following formula (1)：
L1(H+H1)/2R≤0.4 (1).
[2] polarization plates as described in above-mentioned [1], the thickness H of curved surface image display panel is more than 0.4mm.
[3] polarization plates as described in above-mentioned [1] or [2], under 80 DEG C of dry environments, the size changing rate after 250 hours is
Less than 3%.
[4] polarization plates as any one of above-mentioned [1]～[3], the polarizing coating in polarization plates is drawn and/or dye
The polyvinyl alcohol film of color.
[5] polarization plates as any one of above-mentioned [1]～[4], curved surface image display panel has 900～7000mm
Mean radius of curvature R.
[6] polarization plates as any one of above-mentioned [1]～[5], the horizontal direction of polarization plates in a flat state
Length L1 is more than 500mm.
[7] a kind of curved surface image display panel, it is the surface chart picture comprising concave side polarization plates and convex side polarization plates
Display floater, wherein, concave side polarization plates are the polarization plates any one of [1]～[6].
[8] a kind of curved surface image display panel, it is the surface chart picture comprising concave side polarization plates and convex side polarization plates
Display floater, wherein, the concave side polarization plates and convex side polarization plates polarization plates any one of [1]～[6].
The effect of invention
According to the present invention it is possible to provide a kind of polarization plates for curved surface image display panel, even if through long-term use
And/or under hot environment using the stripping of display floater that also can suppress from curved surface state, float.
Brief description
Fig. 1 is the sketch of the curved surface image display panel for mean radius of curvature is described.
Fig. 2 represents the sectional view of the image display panel of curved surface state comprising polarization plates.
Fig. 3 is the sectional view of the composition of a scheme representing the composition of polarization plates and curved surface image display panel.
Fig. 4 represents the axial example of the absorption of the polarization plates in curved surface image display device.
Fig. 5 represents the axial example of the absorption of the polarization plates in curved surface image display device.
Symbol description
1：Concave side polarization plates
2：Convex side polarization plates
3：Image-displaying member
10：Adhesive layer
11：Protective layer
12：Polarizing coating
13：Surface-treated layer
Specific embodiment
Hereinafter, embodiments of the present invention are described in detail.
It should be noted that in the present invention, " flat state " refers to, do not comprise bending section and on the whole be plane shape
State.In addition, " curved surface state " refers to, in addition to the specific situation of the institute such as determined method, overall curved by an arc
Bent state and comprise the bending section based on one or more arcs and generally form the summation of the situation of curved surface.In the present invention
In, " mean radius of curvature " refers to, the meansigma methodss of the radius of curvature at the left and right both ends of display floater and 3 points of central part.
I.e., in FIG, mean radius of curvature is by (RLeft+RIn+RRightThe value that)/3 calculate.
The present invention relates to being used for mean radius of curvature R (mm), the polarization plates of the curved surface image display panel of thickness H (mm).
Cross-directional length is L1 (mm) to the polarization plates of the present invention in a flat state, when fitting in above-mentioned curved surface image display panel
The thickness H1 (mm) becoming the polarization plates of concave side meets following formula (1)：
L1(H+H1)/2R≤0.4 (1).
It should be noted that in the present invention, concave side represents of the viewing side corresponding to curved surface image display panel
Side, convex side refers to, the side opposed with concave side.
Herein, cross-directional length in a flat state be L1, on the image display panel of thickness H laminating have identical
Cross-directional length and have the polarization plates of thickness H1, to reach mean radius of curvature R, (R herein is defined as to plate thickness
Center radius) mode carry out curving (referring to Fig. 2), now, on the basis of the length of the core of panel thus simultaneously
Do not change.On the other hand, the length of the horizontal direction of polarization plates after curving (is defined as polarizing the center of plate thickness
Length) length of circular arc that can be set to radius of curvature { R- (H+H1)/2 } calculated.The inventors discovered that, from L1 to this length
The change of degree is important for the solution of the problem of the present invention.Thus, in the present invention, in order to suppress polarization plates stripping,
Float, above-mentioned variable quantity can be following formula：L1-L1 { R- (H+H1)/2 }/R=L1 (H+H1)/2R suppresses relatively low, i.e.
It is set to 0.4 and the following is important.
The value of L1 (the H+H1)/2R in formula (1) is less than 0.40, preferably less than 0.38, more preferably less than 0.35, enters
One step is preferably less than 0.30.If the value of L1 (the H+H1)/2R in formula (1) is below above-mentioned higher limit, even if through long-term
Using under, hot environment using being also less also easy to produce the stripping of the image display panel from curved surface state for the polarization plates, float.
It should be noted that the value of L1 (the H+H1)/2R in formula (1) is usually more than 0.01.
The shape of curved surface image display panel does not generally bend in the orthogonal direction (up and down), (left in the horizontal direction
Right direction) on by viewer side formed concave surface, opposition side (side such as back light unit) formed convex surface in the way of bend, constitute central shaft be
A part for the cylinder of vertical direction (above-below direction).
Curved surface image display panel has preferably more than 0.4mm, more preferably more than 0.8mm, is more preferably
The thickness H of more than 1.0mm.If the thickness H of curved surface image display panel is more than above-mentioned lower limit, can be made using various materials
It is the part for curved surface image display panel, also easily operate when display floater maximizes, therefore industrially favourable.
It should be noted that the thickness H of curved surface image display panel is usually below 2.0mm.
Curved surface image display panel has preferably below 7000mm, more preferably below 6600mm, is more preferably
Below 5000mm, the mean radius of curvature R even more preferably for below 4000mm, especially preferably below 3000mm.Curved surface
Image display panel has such as more than 300mm, is preferably more than 900mm, more preferably more than 1000mm, is more preferably
The mean radius of curvature R of more than 1200mm.Curved surface image display panel has preferably 900～7000mm, is more preferably 1000
The mean radius of curvature R of～6600mm.If the mean radius of curvature R of curved surface image display panel is below above-mentioned higher limit,
Become less from spectators to the difference of the distance of center Screen and the distance to screen end, can obtain further in picture
Immersion sense.If the mean radius of curvature R of curved surface image display panel is more than above-mentioned lower limit, suppress further because long-term
The stripping of the image display panel from curved surface state for the polarization plates being led to using the use under, hot environment, float.
The mean radius of curvature R of curved surface image display panel also changes therewith according to the equipment using.For example, in personal electricity
In the case that brain, mobile device etc. have the equipment of miniscope, in most cases less (curvature is more for mean radius of curvature R
Greatly).In addition, the equipment that curved-surface display TV etc. has giant display sometimes also wants to reduce mean radius of curvature R and enters one
Step improves immersion sense.Even if under long-term and/or hot environment in the state of mean radius of curvature R is little for the polarization plates of the present invention
Use in, polarization plates are from the stripping of display floater, the inhibition that floats is excellent, therefore can be used for having such as 900～
7000mm, the curved surface image display panel of the mean radius of curvature R of special 900～5000mm or even 1000～4000mm.
The polarization plates of present invention cross-directional length L1 in a flat state is preferably more than 500mm, is more preferably
More than 700mm, more preferably more than 1100mm, it is even more preferably more than 1400mm.If the polarization plates of the present invention exist
Cross-directional length L1 under flat state is more than above-mentioned lower limit, then the level of the curved surface image display panel that can apply
Direction length increases, and can obtain the immersion sense in picture further.In addition, the polarization plates of the present invention are in a flat state
Cross-directional length L1 is usually below 2500mm.It should be noted that the horizontal direction of polarization plates shows with comprising surface chart picture
Show that the horizontal direction of the curved surface image display device of panel is consistent, the vertical direction of polarization plates is orthogonal with above-mentioned horizontal direction
Direction.The polarization plates of present invention vertical-direction length in a flat state is by cross-directional length L1 and curved surface picture display face
The aspect ratio of plate is determined.
In the case of the manufacture that conventional polarization plates are used for curved surface image display panel, even if under normal temperature environment, long
The stripping producing the image display panel from curved surface state for the polarization plates in the case of phase use, the probability floating improve, in addition,
Through lighting for a long time, use in high temperature environments, further promote produce the picture display face from curved surface state for the polarization plates
The stripping of plate, float.Its reason is not limited to specific theory, but think be due to curving and produce by polarization plates
Horizontal direction strain compression stress.In order to suppress this strain compression stress, flat according to curved surface image display panel
All radius of curvature R, thickness H and cross-directional length L1 so that the thickness H1 of polarization plates is changed it is believed that this for suppression polarization plates from
The stripping of the image display panel of curved surface state, float effectively.In the present invention, determined in the way of meeting above-mentioned formula (1) partially
The thickness H1 of vibration plate, is achieved in suppressing the stripping of polarization plates, floats.
The polarization plates of the present invention under 80 DEG C of dry environments the size changing rate after 250 hours be preferably less than 3.0%, more
It is preferably less than 2.0%, more preferably less than 1.5%.The above-mentioned size changing rate of polarization plates is below above-mentioned higher limit
When, the contraction of polarization plates and/or expansion under long-term use, hot environment can be suppressed, be therefore less also easy to produce polarization
The stripping of the image display panel from curved surface state for the plate, float.In addition, the above-mentioned size changing rate of polarization plates be usually 0% with
On.
Size changing rate can be by pressing down to the change in size contributing to the contraction of polarization plates and the polarizing coating of expansion
Make and to be controlled.The change in size of polarizing coating for example can be by changing manufacturing condition, the species such as the stretching ratio of polarizing coating
And improve the protective layer adjoining with polarizing coating rigid etc. being controlled.Specifically, can be by making stretching ratio excellent
Elect less than 8 times as, more preferably less than 7.5 times, more preferably less than 7 times controlling change in size.
It should be noted that size changing rate can be calculated as below：Polarization plates are cut into 100mm × 100mm size, no
Fit in glass, measure the initial size and 80 DEG C of dry environments size after lower 250 hours and be compared thus calculating.When
So fit in via binding agent size changing rate during glass be less than above-mentioned do not fit glass when size changing rate.In addition,
Although also relevant with the species of binding agent, do not fit glass when size changing rate be usually 1/2～1/15 about.
As long as the polarization plates of the present invention are constituted having the function generally having as polarization plates in the way of, just do not limit it
Constitute, such as in a preferred scheme, including：Polarizing coating, via bonding agent polarizing coating single or double be laminated
Protective layer and adhesive layer and optical layers according to circumstances for fitting in image-displaying member.
In an embodiment of the invention, polarization plates by protective layer, polarizing coating, protective layer and adhesive layer and according to
The optical layers of situation are constituted.Herein, it is laminated polarizing coating and protective layer via bonding agent.
Based on Fig. 3, the composition in the polarization plates of the present invention and an embodiment of curved surface image display panel is said
When bright, the polarization plates of the present invention are to stack gradually adhesive layer (10), protective layer from the layer adjoining with image-displaying member (3)
(11), polarizing coating (12), protective layer (11) and optical layers (not shown) as needed form.It should be noted that usual warp
Polarizing coating (12) and protective layer (11) are laminated by bonding agent.In addition, in an embodiment of the invention, the curved surface of the present invention
Image display panel is by image-displaying member (3), the concave side that fits in image-displaying member (3) respectively via adhesive layer (10)
Polarization plates (1) and convex side polarization plates (2) are constituted.In an embodiment of the invention, concave side polarization plates (1) from figure
As display element (3) adjoin layer rise successively by adhesive layer (10), protective layer (11), polarizing coating (12), protective layer (11) and
Surface-treated layer (13) as needed and/or optical layers are constituted, and convex side polarization plates (2) are from adjacent with image-displaying member (3)
The layer connecing rises successively by adhesive layer (10), protective layer (11), polarizing coating (12), protective layer (11) and optical layers structure as needed
Become.
Hereinafter, each constituent of the polarization plates of the present invention is described in detail.
<Adhesive layer>
As the binding agent constituting adhesive layer, use known binding agent with limiting without special, for example may be used
To use the bonding containing base polymers such as acrylic acid seriess, rubber series, carbamate system, silicone-based, polyvingl ether systems
Agent.Furthermore it is possible to be energy ray-curable binding agent, heat-curing type adhesive etc..Among them, with the transparency, bonding force,
Based on the excellent acrylic resin such as doing over again property, weatherability, thermostability, the binding agent of polymer is suitable.
As acrylic adhesive, it is not particularly limited, preferably use (methyl) butyl acrylate, (methyl) acrylic acid
(methyl) acrylic ester base polymer, the bags such as ethyl ester, (methyl) Isooctyl acrylate monomer, (methyl) 2-EHA
Copolymerization system base polymer containing these two or more (methyl) acrylate etc..Additionally, in these base polymer altogether
Poly- polarized monomer.As polar monomer, such as (methyl) acrylic acid, (methyl) acrylic acid 2- hydroxy propyl ester, (first can be enumerated
Base) acrylic acid 2- hydroxy methacrylate, (methyl) acrylamide, (methyl) acrylic acid 2-N, N- dimethylaminoethyl, (methyl) propylene
Acid glycidyl ester etc. has the monomer of carboxyl, hydroxyl, amide groups, amino, epoxy radicals etc..
These acrylic adhesives can also be used alone, but is generally used in combination with cross-linking agent.As cross-linking agent, illustrate
Go out：Bivalence or the polyvalent metal ion of carboxylic metallic salt can be formed between carboxyl；Amido link can be formed between carboxyl
Polyhydric amine compounds；Polyepoxidess or the polyol compound of ester bond can be formed between carboxyl；With carboxyl it
Between can form polyisocyanate compound of amido link etc..Wherein, widely use polyisocyanate compound.
Energy ray-curable binding agent refers to the binding agent with following property：Have by ultraviolet, electron ray
The property solidifying Deng the irradiation of energy-ray, also has cohesive and is sealed at the adherends such as film in energy-ray pre-irradiation,
Can be solidified thus being adjusted closing force by the irradiation of energy-ray.As energy ray-curable binding agent, especially excellent
Choosing uses ultraviolet-curing adhesive.Energy ray-curable binding agent is generally gathered with acrylic adhesive and energy-ray
Conjunction property compound forms as main component.Generally it is combined with cross-linking agent further, in addition, light can also be coordinated as needed to gather
Close initiator, photosensitizer etc..
Adhesive layer is in addition to above-mentioned base polymer and cross-linking agent, according to need in order to the bonding of adjustment binding agent
Power, cohesiveness, viscosity, elastic modelling quantity, glass transition temperature etc., can comprise the resin for example as natural goodses or synthetic
Class, cohesive imparting resin, antioxidant, antistatic additive, UV absorbent, dyestuff, pigment, defoamer, caustic, light gather
Close the additives such as initiator, thermal polymerization.In addition it is also possible to make the light scattering adhesive layer of display containing microgranule.
UV absorbent includes：Salicylate based compound, benzophenone based compound, benzotriazole based compound, cyanoacrylate
Acid esters based compound, nickel complex salt based compound etc..
In the present invention, constitute in the binding agent of adhesive layer, preferably comprise silane based compound, so that cooperation is handed over
Silane based compound is contained in advance in acrylic resin before connection agent.Silane based compound is due to making the bonding force of glass is carried
Height, therefore by comprising silane based compound, the image-displaying member and the adaptation of adhesive layer that are clamped by glass substrate improve,
It is able to ensure that the high bonding force to display floater, so even in the use under long-term and/or hot environment, being not easy to occur
From the stripping of the display floater of curved surface state, float.
Adhesive layer for example can be configured by the following method：By binding agent as described above is made organic solvent
Solution, is coated using die coating machine, gravure coater etc. being intended to be laminated on the film of this adhesive layer or layer (such as polarizing coating etc.),
It is dried.Alternatively, it is also possible to be configured by the following method：By implement the demoulding process after plastic foil (also referred to as every
Film) the upper lamellar binding agent being formed is transferred to the film to be laminated or layer.Thickness for adhesive layer is not particularly limited, preferably
In the range of 2～40 μm, in the range of more preferably 5～35 μm, in the range of more preferably 10～30 μm.If adhesive layer
Thickness be more than above-mentioned lower limit, then can suppress further to lead because of the use under long-term use and/or hot environment
Cause is peeling, floats.If the thickness of adhesive layer is below above-mentioned higher limit, the increase of the thickness of polarization plates is inhibited
As a result, it is unlikely to deform in curved surface state lower bonding layer, can suppress to lead because of the use under long-term use and/or hot environment
Cause is peeling, floats.Thereby, it is possible to suppress the decline of the display function at the frame perimeter of image display device.
In a preferred scheme, the adhesive layer of the polarization plates of the present invention by as butyl acrylate, acrylic acid methyl ester.,
The acrylic resin of acrylic acid 2- phenoxy ethyl, acrylic acid 2- hydroxy methacrylate and acrylic acid copolymer, silane system chemical combination
Thing and the isocyanate compound as cross-linking agent are constituted.
In a preferred embodiment, the polarization plates of the present invention comprise adhesive layer.Above-mentioned adhesive layer 23 DEG C,
During 50%RH measure in a flat state to bonding glass power (hereinafter sometimes referred to as " and to bonding glass power (plane, 23
DEG C) ") it is preferably more than 1.0N/25mm, more preferably more than 2.0N/25mm.If adhesive layer to bonding glass power (plane, 23
DEG C) be more than 1.0N/25mm, then for a long time continuously using, under long-term and/or hot environment using, mobile and protect
In pipe etc., can more effectively suppress polarization plates from the stripping of curved surface image display panel, float.For the present invention polarization plates and
Speech, to bonding glass power (plane, 23 DEG C) more preferably more than 3.0N/25mm, particularly preferably more than 4.0N/25mm.
Additionally, for the polarization plates of the present invention, the adhesive layer that measures under curved surface state to bonding glass power (with
Under be sometimes denoted as " to bonding glass power (curved surface, 23 DEG C) ") be preferably more than 1.5N/25mm, more preferably 2.5N/25mm
More than.The polarization plates of the present invention to bonding glass power (curved surface, 23 DEG C) more preferably more than 3.5N/25mm, further preferably
For more than 4.5N/25mm.Measure under curved surface state might not be right with measure in a flat state to bonding glass power
Bonding glass power is identical, in addition, also not changing according to certain rule such as simple proportionate relationship.The polarization plates of the present invention are used
In curved surface image display device, therefore by under curved surface state, bonding glass power is controlled within the specific limits with only by plane
The situation to bonding glass power of polarization plates that bonding glass power is controlled under state is compared, and can bring and make more realistic
With in the state of the image-displaying member to polarization plates bonding force control.If particularly to bonding glass power (curved surface, 23
DEG C) be more than 1.5N/25mm, be more than 2.5N/25mm further, then it is assembled in curved surface image display panel in polarization plates
Afterwards, even if in long-term use, because long-time using and in the case of being exposed to the heat of light source or to form high temperature many easy
It is also possible to guarantee the sufficient bonding force to image display panel under the harsh environment the such as during transport of wet environment, it is not susceptible to partially
The stripping of the image display panel from curved surface state for the vibration plate, float.
From the viewpoint of substantially ensuring that the bonding force to image display panel for a long time and/or hot environment, preferably
The polarization plates of the present invention be 2.0N/25mm to bonding glass power (plane, 23 DEG C) with to bonding glass power (curved surface, 23 DEG C)
More than, more preferably more than 3.0N/25mm, particularly preferably more than 4.0N/25mm.
On the other hand, in the manufacturing process of curved surface image display panel, during polarization plates of fitting on image-displaying member
Or in the case of occurring patch bad after laminating, sometimes also in the same manner as the manufacturing process of conventional plane picture display floater with flat
Surface state is done over again (that is, peel off and recycle panel), but is also contemplated within being done over again with curved surface state.Carried out with curved surface state
In the case of doing over again, except because be in curving after state and in addition to the compression stress that loaded, in order to show from image
Panel is peeled off polarization plates and has been acted on compression stress further.Therefore, in the case of with the doing over again of curved surface state, and with plane
Doing over again of state is compared, and peels off polarization plates from curved surface image display panel and technically tends to becoming difficult, the especially bonding of polarization plates
The compression stress that power more Gao Ze loads to peel off polarization plates is bigger, therefore easily produces and for example constitutes display surface when peeling off
A problem that there is rupture in the glass plate of plate.
Although image display panel floating, peeling off from polarization plates may not be produced when too high to bonding glass power, but
Above-mentioned such doing over again property is possible to generation problem, thus the polarization plates of the present invention measure in a flat state glass is glued
Make a concerted effort (plane, 23 DEG C) be preferably below 20.0N/25mm, more preferably below 15.0N/25mm, more preferably 10.0N/
Below 25mm, particularly preferably below 6.0N/25mm.In addition, 20.0N/25mm is preferably to bonding glass power (curved surface, 23 DEG C)
Hereinafter, more preferably below 15.0N/25mm, more preferably below 10.0N/25mm, particularly preferably 6.0N/25mm with
Under.
The upper limit of above-mentioned each pair of bonding glass power be above range in the case of, in the manufacture of curved surface image display panel
There is or find the patch bad when of polarization plates in operation, become prone to easily from display floater, polarization plates be done over again.From returning
From the viewpoint of work, in the present invention, it is preferred to bonding glass power (plane, 23 DEG C) and to bonding glass power (curved surface, 23
DEG C) it is below 20.0N/25mm.
In the case that the polarization plates of the present invention comprise adhesive layer, to bonding glass power (plane, 23 DEG C) even if being 20.0N/
Below 25mm so for below 15.0N/25mm, specifically for 10.0N/25mm, be especially below 6.0N/25mm, special further
For below 4.0N/25mm, due to meeting formula (1) it is thus possible to suppression floats, peels off.
Above-mentioned to bonding glass power (plane, 23 DEG C) it is：The polarization plates cutting into given size are pasted via its adhesive layer
Invest flat glass substrate, carry out autoclave process, after standing 24 hours under 23 DEG C, 50%RH, by polarization plates along 180 °
The value that direction is peeled off from glass substrate with fixing speed and measured.To bonding glass power (curved surface, 23 DEG C) it is：With to bonding glass
The assay method of power (plane, 23 DEG C) is similarly carried out, and polarization plates is conformed to glass plate and obtains test film, by gained test film
Fixed in the way of so that test film is followed on the metallic plate be machined to radius of curvature 2500mm, in this state 23 DEG C,
Under 50%RH, standing is after 24 hours, peels off polarization plates and the value that measures.
To bonding glass power (plane, 23 DEG C) with to the more detailed assay method of bonding glass power (curved surface, 23 DEG C) such as
As embodiment described later is described.
In the polarization plates of the present invention, under 80 DEG C of dry environments after 250 hours, the adhesive layer that measures in a flat state
More than 7.0N/25mm is preferably to bonding glass power (hereinafter sometimes referred to as " to bonding glass power (plane, 80 DEG C) "), more excellent
Elect more than 9.0N/25mm, more preferably more than 11.0N/25mm as.In addition, in the polarization plates of the present invention, dry at 80 DEG C
Dry environment is after lower 250 hours, the adhesive layer measuring under curved surface state to bonding glass power (hereinafter sometimes referred to as " to glass
Bonding force (curved surface, 80 DEG C) ") it is preferably more than 8.0N/25mm, more preferably more than 10.0N/25mm, more preferably
More than 12.0N/25mm.Additionally, sometimes due to bonding force raises, when measuring, test film ruptures it is impossible to ring will be dried at 80 DEG C
The above-mentioned each pair of bonding glass masterpiece that border measures after lower 250 hours is measured for numerical value, and this is the particularly preferred of the present invention
One scheme.
When each pair of bonding glass power measuring behind under 80 DEG C of dry environments 250 hours is above-mentioned such value, even if
It is also possible to guarantee the sufficient bonding force to display floater in use for a long time and/or under hot environment etc., it is not susceptible to from song
The stripping of the display floater of surface state, float.Above-mentioned a range of inclined to bonding glass power (plane, 23 DEG C) having
In vibration plate, each pair of bonding glass power measuring after 250 hours under 80 DEG C of dry environments is made to be above-mentioned such value for this
Particularly advantageous for bright polarization plates.
Bonding glass power (plane, 80 DEG C) is preferably compared with bonding glass power (plane, 23 DEG C) high more than 5.0N/25mm,
More preferably high more than 7.0N/25mm, particularly preferably high more than 10.0N/25mm.In addition, it is excellent to bonding glass power (curved surface, 80 DEG C)
Choosing compares bonding glass power (curved surface, 23 DEG C) high more than 5.0N/25mm, more preferably high more than 7.0N/25mm, particularly preferably high
More than 10.0N/25mm.In there are the above-mentioned a range of polarization plates to bonding glass power (plane, 23 DEG C), Jin Erruo
The each pair of bonding glass power measuring after 250 hours under 80 DEG C of dry environments is than each pair of glass measuring under 23 DEG C, 50%RH
High more than the 5.0N/25mm of bonding force, then, under the laminating original state after fitting in image-displaying member, can not only ensure
Fit in image-displaying member and under room temperature to low temperature environment using required bonding force additionally it is possible to easily returned
Work.Even if additionally, in the case of the heat being exposed to long-time light source, in the easy transport forming high temperature and humidity environment and
It is also possible to guarantee the sufficient bonding force to display floater in the use under long-term and/or hot environment, it is not susceptible to from song
The stripping of the display floater of surface state, float.
Glue with the difference to bonding glass power (plane, 23 DEG C) and to glass for bonding glass power (plane, 80 DEG C)
Make a concerted effort (curved surface, 80 DEG C) and the difference to bonding glass power (curved surface, 23 DEG C), each there is no particular restriction for its upper limit, usually
Below 20.0N/25mm.
Bonding glass power (curved surface, 80 DEG C) is preferably compared with bonding glass power (plane, 23 DEG C) high more than 5.0N/25mm,
More preferably high more than 7.0N/25mm, particularly preferably high more than 10.0N/25mm.If to bonding glass power (curved surface, 80 DEG C) with right
The difference of bonding glass power (plane, 23 DEG C) is in above range, then easily carry out the laminating under flat state and do over again, even if
It is also possible to guarantee the sufficient bonding force to display floater in use for a long time and/or under hot environment etc. after curving, it is difficult
There is the stripping of the display floater from curved surface state, float.
Above-mentioned to bonding glass power (plane, 80 DEG C) and to bonding glass power (curved surface, 80 DEG C) except by test film 80
DEG C, under dry environment standing 250 hours in addition, by with above-mentioned to bonding glass power (plane, 23) with to bonding glass power
(curved surface, 23 DEG C) same method is measured.
Adhesive layer to bonding glass power due to according to the species of composition, its content ratio, the formation condition constituting adhesive layer
(drying, active energy beam irradiate condition), formed after thickness etc. and change, therefore according to desired to bonding glass power
The suitably constituent of selection adhesive layer, content ratio, formation condition, thickness etc..Specifically, for example can be by using
Acrylic resin is as the constituent of the binding agent constituting adhesive layer, cooperation silane based compound and make adhesive layer
Thickness thicken to improve adhesive layer to bonding glass power.In addition, by the species changing the monomer constituting acrylic resin
And its ratio, the species of silane based compound and its content, can will be controlled to desired value to bonding glass power.
<Polarizing coating>
As the polarizing coating of the polarization plates that may make up the present invention, it is the work(having from incident natural light extraction line polarized light
The film of energy, for example, can use the film being adsorbed with dichroism pigment in polyvinyl alcohol resin orientation on membranes.Poly- as constituting
The polyvinyl alcohol resin of vinyl alcohol resin film, can will use after polyvinyl acetate system resin saponification.As poly- acetic acid
Vinyl acetate system resin, in addition to the homopolymer of vinyl acetate is polyvinyl acetate, can enumerate vinyl acetate with can
The copolymer (such as vinyl-vinyl acetate copolymer etc.) of other monomers copolymerized therewith.As can with vinyl acetate altogether
Poly- other monomers, for example, can enumerate：Unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class, there is ammonium
Acrylic amide etc..
The saponification degree of polyvinyl alcohol resin is usually 85～100 moles of %, preferably 98 moles more than %.Polyvinyl alcohol
It is that resin can be modified, for example, can use through the modified polyvinyl formal of aldehydes, polyvinyl acetal and poly- second
Enol butyral etc..The degree of polymerization of polyvinyl alcohol resin is usually 1000～10000, preferably 1500～5000.
Can will be used as the base film of polarizing coating after such polyvinyl alcohol resin masking.By polyvinyl alcohol resin masking
Method be not particularly limited, can be filmed with known method.Comprise the film of the base film of polyvinyl alcohol resin
Thickness is not particularly limited, if it is considered that easy stretch, for example, 10～150 μm, and preferably 15～100 μm, more preferably 20
～80 μm.
Polarizing coating generally goes through following operation and is manufactured：The polyvinyl alcohol resin film such as such polyvinyl alcohol film is entered
The operation of row uniaxial tension；With dichroism pigment, polyvinyl alcohol resin film is carried out dyeing thus absorption dichroism pigment
Operation；The operation polyvinyl alcohol resin film being adsorbed with dichroism pigment being processed with boric acid aqueous solution；With
Using the operation washed after the process of boric acid aqueous solution.From the viewpoint of industrial, preferably use the warp thus manufacturing
The polyvinyl alcohol film of stretching dyeing is as polarizing coating.It should be noted that the polyvinyl alcohol film of drawn dyeing refers to, bag
Stretching polyethylene alcohol film containing (being adsorbed with) dichroism pigment, stretching ratio is as described below.
The uniaxial tension of polyvinyl alcohol resin film or can be dyeed with dyeing before dichroism pigment dyeing simultaneously
After carry out.When carrying out uniaxial tension after dyeing, this uniaxial tension can be carried out in boric acid before processing or boric acid are processed.This
Outward it is also possible to carry out uniaxial tension by above-mentioned multiple stages.During uniaxial tension, can be along list between the different roller of peripheral speed
Axle is stretched, it is possible to use hot-rolling is stretched along single shaft.Additionally, uniaxial tension can be drawn in an atmosphere
The dry type stretching stretched or make the wet type being stretched in the state of polyvinyl alcohol resin membrane swelling draw with solvent
Stretch.From the viewpoint of the deformation of suppression polarizing coating, stretching ratio is preferably less than 8 times, more preferably less than 7.5 times, enters one
Step is preferably less than 7 times.In addition, from the viewpoint of making to present as the function of polarizing coating, stretching ratio be usually 4.5 times with
On.
Method as being dyeed to polyvinyl alcohol resin film with dichroism pigment, for example, can enumerate polyethylene
The method that alcohol resin film impregnates in the aqueous solution containing dichroism pigment.As dichroism pigment, can using iodine, two
Chromotropism dyestuff.Dichroic dye for example includes：C.I.DIRECT RED 39 etc. comprises the dichroism of bis-azo compound
Direct dyess, comprise the dichroism direct dyess of trisazo-, four azo-compounds etc..It should be noted that polyethenol series
Resin film preferably implements the process of dipping in water in dyeing before processing.
When iodine is used as dichroism pigment, generally using by polyvinyl alcohol resin film containing iodine and potassium iodide
The method being dyeed is impregnated in aqueous solution.The content of the iodine in this aqueous solution is usually every 100 mass parts water 0.01～1 mass
Part, the content of potassium iodide is usually every 100 mass parts water 0.5～20 mass parts.When iodine is used as dichroism pigment, it is used for
The temperature of the aqueous solution of dyeing is usually 20～40 DEG C, in addition, the dip time (dyeing time) in this aqueous solution is usually
20～1800 seconds.
When dichroic dye is used as dichroism pigment, it is typically employed in and comprises water solublity dichroic dye
The method that in aqueous solution, dipping polyvinyl alcohol resin film is dyeed.The content of the dichroic dye in this aqueous solution is usual
For every 100 mass parts water 1 × 10-4～10 mass parts, preferably 1 × 10-3～1 mass parts, more preferably 1 × 10-3～1 × 10-2
Mass parts.This aqueous solution can contain the inorganic salts such as sodium sulfate as dyeing assistant.Dichroic dye is used as dichroic
Property pigment when, the temperature for the aqueous dye solutions of dyeing is usually 20～80 DEG C, in addition, the dip time in this aqueous solution
(dyeing time) is usually 10～1800 seconds.
Boric acid after being dyeed using dichroism pigment is processed and can pass through dyed polyvinyl alcohol resin
Film carries out dipping to carry out in borated aqueous solution.The amount of the boric acid in borated aqueous solution is usually every 100 mass
Part water 2～15 mass parts, preferably 5～12 mass parts.When iodine is used as dichroism pigment, preferably this is borated water-soluble
Liquid contains potassium iodide.The amount of the potassium iodide in borated aqueous solution is usually every 100 mass parts water 0.1～15 mass parts, excellent
Elect 5～12 mass parts as.Dip time in borated aqueous solution usually 60～1200 seconds, preferably 150～600
Second, more preferably 200～400 seconds.The temperature of borated aqueous solution is usually more than 50 DEG C, preferably 50～85 DEG C, more excellent
Elect 60～80 DEG C as.
Generally washing process is carried out to the polyvinyl alcohol resin film after boric acid process.Washing process is for example passed through will be through boron
The polyvinyl alcohol resin film of acid treatment carries out dipping to carry out in water.The temperature of the water in washing process is usually 5～40
DEG C, dip time is usually 1～120 second.Implement dried after washing and obtain polarizing coating.Dried can use hot blast
Drying machine, far infra-red heater are carried out.The temperature of dried is usually 30～100 DEG C, preferably 40～95 DEG C, more preferably
For 50～90 DEG C.Usually 60～600 seconds time of dried, preferably 120～600 seconds.
So, polyvinyl alcohol resin film is implemented with uniaxial tension, the dyeing using dichroism pigment and boric acid to process,
Obtain polarizing coating.The thickness of polarizing coating for example can be set to 5～40 μm.
For in the thin film polarizing coating of application type, with known by polyvinyl alcohol resin film stretching
Polarizing coating compares that size changing rate is little, therefore by using the thin film polarizing coating of application type, can suppress long-term using and/or
The change in size of the polarization plates in use under hot environment.In addition, can aid in the filming of polarization plates, in the present invention
It is preferred.As the thin film polarizing coating of application type, for example, can use Japanese Unexamined Patent Publication 2012-58381, Japanese Unexamined Patent Publication 2013-
37115th, International Publication No. 2012/147633, the thin film polarizing coating of application type illustrating in International Publication No. 2014/091921.
<Protective layer>
In a preferred scheme, the polarization plates of the present invention have the guarantor of the single or double stacking in above-mentioned polarizing coating
Sheath.The polarization that protective layer for example contributes to preventing the contraction of polarizing coating and expansion, prevents caused by temperature, humidity, ultraviolet etc.
The deterioration of film, thus the polarization plates of the preferred present invention have protective layer.
As the material forming protective layer, preferably clear, mechanical strength, heat stability, moisture shielding, isotropism
Etc. excellent material.For example can enumerate：The polyester based polymer such as polyethylene terephthalate, PEN；Two
The cellulose-based polymer such as acetylcellulose, tri acetyl cellulose；The acrylic acid series polymeric compounds such as polymethyl methacrylate；
The styrenics such as polystyrene, acrylonitritrile-styrene resin (AS resin)；Merlon based polymer.In addition, it is poly-
Ethylene, polypropylene, ring system or there is the polyolefin polymer such as the polyolefin of norborene structure, ethylene-propylene copolymer；Chlorine
Ethylene-based polymer；The amide based polymer such as nylon, aromatic polyamide；Imide series polymer；Sulfone based polymer；Polyether sulfone
Based polymer；Polyether-ether-ketone based polymer；Polyphenylene sulfide based polymer；Vinyl alcohol system polymer；Vinylidene chloride based polymer；Second
Thiazolinyl butyral based polymer；Aromatic ester based polymer；Polyoxymethylene based polymer；Epoxy based polymer；Or above-mentioned polymerization
Mixture of thing etc. also can enumerate the example as the polymer forming protective layer.Protective layer can also be by acrylic acid seriess, ammonia
The thermohardening types such as carbamate system, acrylic urethane system, epoxy, silicone-based or the resin shape of ultraviolet hardening
The cured layer becoming.Wherein, the material having with the hydroxyl of the reactivity of isocyanate crosslinking, particularly preferred fiber are preferably comprised
Prime system polymer.The thickness of protective layer is not particularly limited, usually less than 500 μm, preferably 1～300 μm, and more preferably 5
～200 μm, more preferably 30～100 μm.In addition, protective layer can be by the transparent protective film being attached with optical compensation function
Deng composition.It should be noted that in the thickness of the outside protective layer of the rear side stacking of polarizing coating and the viewing side in polarizing coating
The thickness of the inner side protective layer of stacking is preferably identical or outside protective layer protects thickness than inner side.So, especially to polarization
Plate applies outside during heat and the warpage of inner side protective layer is suppressed, or due to rigid downside warpage, thus be not susceptible to from
The stripping of display floater, float.This particularly preferably applies in concave side.
By improving the rigidity of the protective layer adjoining with polarizing coating, the contraction of polarizing coating can be suppressed, therefore pass through to control
The rigidity of protective layer is such that it is able to suppress the change in size of polarization plates.Here, rigidity is defined as film for protective layer in room temperature
Tensile modulus of elasticity (being denoted as 23 DEG C of elastic modelling quantity below) under (23 DEG C) is multiplied by rigidity obtained by thickness and in 80 DEG C of conditions
Under tensile modulus of elasticity (being denoted as 80 DEG C of elastic modelling quantity below) be multiplied by obtained by thickness rigidity.Especially, by improving 80 DEG C of bullets
Property modulus is multiplied by the rigidity of thickness, can suppress polarization plates change in size in high temperature environments.For example, with triacetyl
Cellulose is preferably 23 DEG C elastic modelling quantity of cellulose-based polymer of representative is that 3000～5000MPa, 80 DEG C of elastic modelling quantity are
The scope of 2000～4000MPa, preferably 23 DEG C elastic modelling quantity of the acrylic acid series polymeric compounds with polymethyl methacrylate as representative
The scope being 800～2500MPa for 2000～4000MPa, 80 DEG C of elastic modelling quantity, the polyolefin with norborene structure gathers
The scope that preferably 23 DEG C elastic modelling quantity of compound are 2000～4000MPa, 80 DEG C of elastic modelling quantity are 1500～3000MPa.
The face not being adhered to the protective layer of polarizing coating can have surface-treated layer, for example, can have：Hard conating, anti-
The optical layers such as reflecting layer, tissue adhesion layer, antiglare layer or diffusion layer.
The purpose of hard conating is to prevent polarization plates surface tear etc., and for example can pass through will be based on acrylic acid seriess, silicone
The excellent cured films such as the hardness of ultraviolet curing resin, sliding properties such as system are additional to mode on surface of protective layer etc.
Formed.The purpose of anti-reflection layer be to prevent polarization plate surface exterior light reflection, can by formed according to
Past antireflection film etc. and realize.In addition, the purpose of tissue adhesion layer be to prevent closely sealed with adjacent layer.
In addition, the purpose of antiglare layer is, prevent exterior light from occurring reflection to hinder polarization plates saturating on the surface of polarization plates
Penetrate identification of light etc., for example can by based on sandblasting mode, the roughened mode of embossing processing mode, transparent particle cooperation
The modes such as mode give minute concave-convex structure on the surface of protective layer and are formed.As in order to form above-mentioned surface micro concavo-convex knot
Structure and the microgranule that contains, for example, can enumerate：The silicon dioxide being 0.5～50 μm by mean diameter, aluminium oxide, titanium oxide, oxidation
The inorganic system microgranule of the had electric conductivity of formation such as zirconium, stannum oxide, Indium sesquioxide., Aska-Rid., stibium oxide, by crosslinked or uncrosslinked
The transparent particle such as the organic system microgranule of formation such as polymer.When forming surface minute concave-convex structure, the content of microgranule with respect to
Transparent resin 100 mass parts forming surface minute concave-convex structure are usually 2～50 mass parts, preferably 5～25 mass parts.Anti-
Dizzy layer can expand the diffusion layer (visual angle expanded functionality etc.) at visual angle etc. as by the diffusion of polarization plates transmitted light.Need explanation
It is that protective layer can contain known additive as needed.As additive, can enumerate：Ion capturing agent, antioxidant,
Sensitization auxiliary agent, light stabilizer, viscosifier, thermoplastic resin, filler, flowing regulator, plasticizer, defoamer, pigment, anti-quiet
Electric agent and UV absorbent etc..
It should be noted that above-mentioned anti-reflection layer, tissue adhesion layer, diffusion layer, antiglare layer etc. can either be arranged at protective layer
Itself and integration, or separately as with protective layer and non-integral optical layers are configured.
<Bond layer>
Polarizing coating is generally bonding via bonding agent with protective layer.As the bonding that polarizing coating and protective layer are carried out with bonding
Agent, is not particularly limited, and from the viewpoint of making formed bond layer thinning, can enumerate water system bonding agent, will bonding
Agent composition is dissolved in the bonding agent of water or the bonding agent that bonding agent composition is scattered in water.For example, become as bonding agent
Dividing can be using the bonding agent comprising polyvinyl alcohol resin or carbamate resins.Two-sided in polarizing coating has protective layer
When, used in this bonding, bonding agent can be the same or different.
When comprising polyvinyl alcohol resin as bonding agent composition, polyvinyl alcohol resin is except partly-hydrolysed polyethylene
Carboxy-modified polyvinyl alcohol, acetoacetyl modified polyvinyl alcohol, methylol is can also be beyond alcohol, fully saponified polyvinyl alcohol
The modified polyvinyl alcohol resins such as modified polyvinylalcohol, amino modified polyvinyl alcohol.Generally, with polyvinyl alcohol resin it is
The bonding agent of bonding agent composition is prepared in the form of the aqueous solution of polyvinyl alcohol resin.Polyvinyl alcohol resin in bonding agent
Concentration with respect to water 100 mass parts be usually 1～10 mass parts, preferably 1～5 mass parts.
In with polyvinyl alcohol resin for the bonding agent of bonding agent composition, in order to improve cementability, preferably comprise Biformyl,
The curability compositions such as water-soluble epoxy resin and/or cross-linking agent.As water-soluble epoxy resin, for example, can compatibly use：
Make epichlorohydrin and the reaction by dicarboxylic acids such as the polyalkylene polyamine such as diethylenetriamines, trien and adipic acids
Obtained from daiamid reacted obtained from polyamide polyamine epoxy resin.As this polyamide polyamine asphalt mixtures modified by epoxy resin
The commercially available product of fat, can enumerate：" Sumirez Resin 650 " (Sumika Chemtex Co. Ltd. system), " Sumirez
Resin 675 " (Sumika Chemtex Co. Ltd. system), " WS-525 " (Japan PMC Corp's system) etc..These curable
The addition (being its total amount when all adding) of composition and/or cross-linking agent is usual with respect to polyvinyl alcohol resin 100 mass parts
For 1～100 mass parts, preferably 1～50 mass parts.If the addition of above-mentioned curability composition and/or cross-linking agent is above-mentioned model
In enclosing, then cementability improves, and can form the bond layer of display good bonding.
In addition, when comprising carbamate resins as bonding agent composition, preferably using：Polyester ionomer type amino first
The mixture of acid ester resin and the compound with glycidoxy.Herein, Polyester ionomer type carbamate resins are
Refer to, there is polyester backbone and be imported with the carbamate resins of ionic composition (hydrophilic component) on a small quantity in this skeleton.Should
Ionomer type carbamate resins do not use emulsifying agent and directly in water, emulsifying forms emulsion, therefore suitable as water system
Bonding agent.Polyester ionomer type carbamate resins itself are known, such as Japanese Unexamined Patent Publication 7-97504 publication
The middle example recorded for the macromolecule dispersing agent making phenol resin be scattered in aqueous medium, in addition, Japanese Unexamined Patent Publication 2005-
Disclose Polyester ionomer type carbamate resins in No. 70140 publications and Japanese Unexamined Patent Publication 2005-208456 publication
With the mixture of the compound with glycidoxy as bonding agent, the polarizing coating comprise polyvinyl alcohol resin is fitted
The form of cyclic olefine resin film.
Bonding agent in polarizing coating and/or in this polarizing coating on laminating protective layer (protecting film) on coating can be with known
Method carry out, for example can use：The tape casting, bar rubbing method, gravure coating process, comma coating machine method, doctor blade method, die coating
Method, Dipcoat method, nebulization etc..The tape casting refers to, using as applied thing film in an approximate vertical direction, approximate horizontal side
To or incline direction between the two move, flow down bonding agent the method being allowed to spread in its surface simultaneously.Coating adhesive
Afterwards, polarizing coating is overlapping with the protective layer treated with this polarizing coating is fitted, carry out clamping the laminating to carry out film using niproll etc..
Laminating using the film of niproll for example can adopt：After coating adhesive, pressurizeed with roller etc. and uniformly extruded expansion
The method of exhibition；After coating adhesive, by being pressurizeed between roller and roller thus being carried out extruding method of extension etc..Now,
The material of the roller being used can be metal, rubber etc..In addition, when making film pass through to carry out extruding extension between multiple rollers, multiple rollers
Can be identical material or unlike material.
It should be noted that in order to improve cementability, can suitably the bonding plane of polarizing coating and protective layer be implemented etc.
Gas ions process, sided corona treatment, ultraviolet treatment with irradiation, flame (flame) process, saponification process etc. are surface-treated.As soap
Change is processed, and can be set forth in the method impregnated in the aqueous solution of the alkali such as sodium hydroxide, potassium hydroxide.
After above-mentioned laminating, it is dried and so that bonding agent is solidified it is hereby achieved that polarization plates.This dried is for example passed through
Injection hot blast carry out, its temperature be usually 40～100 DEG C in the range of, in the range of preferably 60～100 DEG C.In addition, being dried
Time is usually 20～1200 seconds.
The thickness of the bond layer being formed by dried bonding agent is usually 0.001～5 μm, preferably 0.01～2 μm,
More preferably 0.01～1 μm.If the thickness of bond layer is in above range, it is able to ensure that sufficient cementability, separately
Outward, in appearance it is also preferred that, and can aid in the filming of polarization plates, be consequently adapted to the polarization plates of the present invention.
After above-mentioned drying, can more than room temperature at a temperature of implement at least half a day, the ripening that is preferably more than several days comes
Obtain sufficient adhesive strength.Curing temperature is preferably 30～50 DEG C of scope, more preferably 35～45 DEG C of scope.If ripening
Temperature is in above range, then so-called " rolling tightly (volume I ま り) " under reel state is not susceptible to.It should be noted that it is ripe
Humidity during change is not particularly limited, as long as relative humidity is the scope of 0～70%RH.Curing time is usually 1～10
My god, preferably 2～7 days.
In addition, as above-mentioned bonding agent, it is possible to use Photocurable adhesive agent.As Photocurable adhesive agent, for example
Can enumerate：The mixture of photo-curable epoxy resin and light cationic polymerization initiator etc.；Light-curable acrylic system resin with
The mixture of optical free radical polymerization initiator etc..During using Photocurable adhesive agent, make light solid by irradiating active energy beam
The property changed bonding agent solidification.The light source of active energy beam is not particularly limited, and preferably has luminous distribution in below wavelength 400nm
Active energy beam, specifically preferably low pressure mercury lamp, medium pressure mercury lamp, high voltage mercury lamp, ultrahigh pressure mercury lamp, chemical lamp, black
Light lamp, microwave-excited mercury lamp, metal halide lamp etc..
The photo-irradiation intensity of Photocurable adhesive agent is suitably determined according to the composition of Photocurable adhesive agent, not especially
Limit, 0.1～6000mW/cm is preferably to the exposure rate of the effective wavelength region of activation of polymerization initiator2, more preferably
For 10～1000mW/cm2, more preferably 20～500mW/cm2.If this exposure rate is in above range, can ensure that anti-
Between seasonable, it is additionally possible to suppress the ring being led to because of the heating when light and heat curable bonding agent of radiation of light source is in solidification
The xanthochromia of oxygen tree fat, the deterioration of polarizing coating.To light irradiation time of Photocurable adhesive agent according to the photo-curable being solidified
Bonding agent suitably selects, and is not particularly limited, with above-mentioned exposure rate and irradiation time long-pending in the form of the accumulation that represents
Light quantity is preferably set to 10～10000mJ/m2, more preferably 50～1000mJ/m2, more preferably 80～500mJ/m2.If
Accumulated light to Photocurable adhesive agent is in above range, then can produce the activity from polymerization initiator of sufficient quantity
Species and more reliably advance curing reaction, in addition, irradiation time will not become long, be able to maintain that good productivity ratio.
It should be noted that when so that Photocurable adhesive agent is solidified by the irradiation of active energy beam, preferably for example
The degree of polarization of polarizing coating, absorbance and form and aspect and the polarization plates constituting the transparency of various films of protective layer and optical layers etc
Various functions do not decline under conditions of solidified.
<Optical layers>
The polarization plates of the present invention can be laminated with the light such as phase retardation film, compensation film for angular field of view and brightness enhancement film as needed further
Learn layer.
As phase retardation film, can enumerate：Macromolecule raw material is carried out with the birefringence of uniaxially or biaxially calendering process
Property film, the alignment films of liquid crystal polymer, supported with film liquid crystal polymer oriented layer phase retardation film etc..Stretch processing
For example can be carried out by roller stretching method, long gap pulling method, tenter stretching method, tubular pull method etc..Stretching ratio is in list
It is usually 1.1～3 times in the case of axle stretching.The thickness of phase retardation film is not particularly limited, usually 10～200 μm, preferably
For 20～100 μm.
As macromolecule raw material, for example, can enumerate：Polyvinyl alcohol, polyvinyl butyral resin, polymethyl vinyl ether, poly-
Hydroxyethyl Acrylate, hydroxyethyl cellulose, hydroxypropyl cellulose, methylcellulose, Merlon, polyarylate, polysulfones, poly- right
Polyethylene terephthalate, PEN, polyether sulfone, polyphenylene sulfide, polyphenylene oxide, polyallyl sulfone, polyvinyl alcohol, poly-
Amide, polyimides, polyolefin, the polyolefin with norborene structure, polrvinyl chloride, cellulose-based polymer or it
Binary system, the various copolymer of ternary system, graft copolymer, mixture etc..These macromolecule raw materials pass through the shapes such as stretching
Become orientation thing (stretched film).
As liquid crystal polymer, for example, can enumerate：It is imported with imparting liquid crystal aligning in the main chain or side chain of polymer
The backbone chain type of linear atomic group (mesomorphic) of conjugacy or the various polymer of side chain type.Liquid crystal polymer as backbone chain type
Concrete example, can enumerate：It is bonded the polyester of the such as nematic orientation of the structure of mesomorphic group with the spacer portion giving bendability
It is liquid crystal polymer, plate-like polymer, cholesteric polymer etc..As the concrete example of the liquid crystal polymer of side chain type, can enumerate：
Using polysiloxanes, polyacrylate, polymethacrylates or Crude oil ester as main chain backbone and via comprising conjugacy
The spacer portion of atomic group and have nematic orientation give property the mesomorphic portion conduct comprising para-orientation ring-type compound unit
Liquid crystal polymer of the side chain type of side chain etc..These liquid crystal polymers are for example carried out as follows process：To being formed on glass plate
Polyimides, the surface of the thin film such as polyvinyl alcohol carry out friction treatment after material, the material of oblique evaporation silicon oxide etc.
Carry out heat treatment after the solution of liquid crystal polymer is sprawled on orientation process face.
Phase retardation film can be for example to carry out to the coloring causing because of the birefringence of various wave plates or liquid crystal layer, visual angle etc.
Phase retardation film for the purpose of compensation etc. has the phase retardation film of phase contrast corresponding with application target, can be for being laminated two or more
Phase retardation film and film that the optical characteristics such as phase contrast are controlled etc..
Even if compensation film for angular field of view is to expand the angle of visual field to make from the direction viewing liquid crystal display dress with respect to screen slightly inclination
Also the film it can be clearly seen that image can be compared during the screen put.As such compensation film for angular field of view, for example, include：Phase contrast
The alignment films of film, liquid crystal polymer etc., it is supported by film of oriented layer of liquid crystal polymer etc. etc. over the transparent substrate.Common phase
Potential difference film has birefringent polymeric film using carry out uniaxial tension in its face direction, on the other hand, as viewing angle compensation
The phase retardation film of film uses：Along the plane direction carries out biaxial stretch-formed thering is birefringent polymeric film；Along the plane direction carries out single shaft
What stretching, the refractive index to thickness direction being also carried out stretching in thickness direction were controlled has birefringent polymer
Film, tilted alignment film etc biaxial stretching film etc..As tilted alignment film, can enumerate for example：On polymeric film, bonding heat is received
Contracting film, carries out stretch processing or/and shrink process in the presence of its contractility being obtained by heating to polymeric film
Tilted alignment film；Make tilted alignment film of liquid crystal polymer tilted alignment etc..As the raw material raw polymer of phase retardation film,
Can suitably select using same previously in the polymer described in phase retardation film prevent because derive from liquid crystal cell based on
Polymer for the purpose of coloring that the change of the angle of visual field of phase contrast is led to etc., angle of visual field of expansion good discrimination etc..
In addition, from the viewpoint of the big angle of visual field realizing good discrimination, preferably using the oriented layer of liquid crystal polymer, special
Do not preferably use and support the optics that is made up of the tilted alignment layer of discotic mesogenic polymer respectively to different from tri acetyl cellulose film
The compensation film for angular field of view of property layer.
The backside that polarization plates after polarization plates are fitted with brightness enhancement film are generally arranged at liquid crystal cell uses.Brightness enhancement film due to
The backlight of liquid crystal indicator etc., from reflection of dorsal part etc. be shown in natural light incident when reflection specification polarization axle linear polarization
The circularly polarized light of light or prescribed direction and the characteristic of transmission other light, brightness enhancement film is made to be derived from the polarization plates after polarization plates stacking
The light of the light sources such as backlight is incident and obtain the transmitted light of regulation polarization state, and the light beyond above-mentioned regulation polarization state is anti-
Penetrate and transmission does not occur.Make after reflecting layer that the light that this blast face reflects is arranged via side behind further etc. inverts
Enter again and inject brightness enhancement film so as to part or all carries out transmission in the form of the light of regulation polarization state, it is achieved thereby that
Through the increment of the light of brightness enhancement film, and supply the polarized light that polarizing coating is difficult to absorb, thus realization can be used for liquid crystal image and shows
The increase of the light quantity shown etc., thus can improve brightness.That is, do not use brightness enhancement film and passed through from the dorsal part of liquid crystal cell using backlight etc.
During polarizing coating incident illumination, the light with the polarization direction inconsistent with the polarization axle of polarizing coating almost absorbed by polarizing coating it is impossible to
Through polarizing coating.I.e. although different because of the characteristic of polarizing coating used, but about 50% light is absorbed by polarizing coating, correspondingly, can
Reduce for the light quantity that liquid crystal image shows etc., image is dimmed.Brightness enhancement film does not make there is the polarization side that can be absorbed by polarizing coating
To light enter to inject polarizing coating, but make to have the light of the polarization direction that can be absorbed by polarizing coating temporarily occur in brightness enhancement film anti-
Penetrate, so the reflecting layer etc. via the setting of side behind and invert, enter to inject brightness enhancement film again, repeat said process, only make
The polarization direction of the light that the rwo reflects, invert becomes the polarized light transmission of the polarization direction that may pass through polarizing coating and supplies
Award polarizing coating it is thus possible to the image that the light of backlight etc. is efficiently used for liquid crystal indicator shows, being capable of blast screen.
The polarization plates of the present invention for example can be carried out as follows manufacture：Fitted on polarizing coating protective layer using bonding agent,
The surface of the protective layer of the side fitted with image-displaying member forms adhesive layer, is thus manufactured.The polarization plates of the present invention
In the case of also comprising optical layers, for example using bonding agent on the protection layer fit constitute optical layers various films, with protection
The face of the opposition side in face of layer bonding forms adhesive layer.By constitute each film of polarization plates and layer be laminated obtained from partially
Vibration plate carry out before fitting with image-displaying member curving so that reaching desired radius of curvature, it is hereby achieved that this
The polarization plates of invention.Curving alternatively, it is also possible to carry out after fitting with image-displaying member.
For for the fitting of image-displaying member, such as in the case of for curved surface display panels, incite somebody to action this
The polarization plates of invention fit in the liquid crystal cell as image-displaying member via adhesive layer.In addition, organic for curved surface
In the case of EL panel, the polarization plates of the present invention are fitted in the organic EL display unit as image-displaying member via adhesive layer
The viewing side display surface of part.
For polarization plates curving for, such as in the case of display panels, can enter by the following method
OK：By the duplexer of the image-displaying member of making proceeded as above and concave side and convex side polarization plates to specify curvature
It is placed in the method on back light unit after being fixed on framework in the state of radius bend；Or to specify radius of curvature march
The method being pressed with framework from the upper side after loading above-mentioned duplexer on back light unit behind face.
The polarization plates of the present invention can serve as the curved surface image display panel of curved surface liquid crystal panel, curved surface organic EL panel etc.
Polarization plates, the especially polarization plates of curved surface display panels.In curved surface image display panel, because image display panel is curved
Bent and persistently produce compression stress.It can be said that compression stress is bigger in concave side (viewing side), therefore in the polarization of concave side
Plate is susceptible to change in size, on the other hand, laminating polarization plates image-displaying member due to generally being clamped with glass substrate,
Therefore it is not susceptible to change in size, easily produce the difference of shrinkage factor between concave side polarization plates and image-displaying member.Therefore,
It is particularly easy to produce the stripping of polarization plates, floats in the concave side of curved surface image display panel.The polarization plates of the present invention can be used
Make to constitute any one of concave side polarization plates and convex side polarization plates of curved surface image display panel, to the stripping under curved surface state
From, float there is high inhibition, be therefore particularly suitable as being installed on the concave surface lateral deviation of the concave side of image display panel
Vibration plate.I.e., in an embodiment of the invention, provide and comprise concave side polarization plates and convex side polarization plates and concave surface lateral deviation
Vibration plate is the curved surface image display panel of the polarization plates of the present invention.In addition, in another embodiment of the present invention, provide and comprise
Concave side polarization plates and convex side polarization plates and concave side polarization plates and the curved surface of polarization plates that convex side polarization plates are the present invention
Image display panel.
In addition, when using the polarization plates of the present invention in display panels, convex side polarization plates are polarized with concave side
Configure in the way of the absorption direction of principal axis (draw direction) of each polarizing coating to comprise in these polarization plates for the plate is mutually orthogonal.For example,
If as shown in figure 4, the absorption direction of principal axis of the polarizing coating comprising in concave side polarization plates is horizontal direction, in convex side polarization plates
The absorption direction of principal axis of the polarizing coating comprising is vertical direction.If in addition, the as shown in figure 5, polarization comprising in concave side polarization plates
The absorption direction of principal axis of film is vertical direction, then the absorption direction of principal axis of the polarizing coating comprising in convex side polarization plates is horizontal direction.
The absorption direction of principal axis of the polarizing coating comprising in concave side polarization plates can be vertical direction, can be horizontal direction, can be phase
The angle direction being 45 ° for horizontal direction.Find in the present invention, in most product of image display panel, concave side
The absorption direction of principal axis of the polarizing coating comprising in polarization plates is horizontal direction, especially in this case, easily produces polarization plates
The deformation such as contraction, easily produces the stripping of polarization plates, floats.According to the polarization plates of the present invention, even if the direction of absorption axiss is water
Square to it is also possible to suppression polarization plate surface scuffing, can solve the problem that above-mentioned problem.
In addition, the polarization plates of the present invention can be suitably employed in the curved surface image display panel with various screen sizes.
For example can be used for that there are 5 inches of (cross-directional length：100～150mm), 10 inches of (cross-directional length：200～
250mm), 17 inches of (cross-directional length：320～400mm), 32 inches of (cross-directional length：680～720mm), 40 inches
(cross-directional length：860～910mm), 46 inches of (cross-directional length：980～1030mm), 55 inches (horizontal direction is long
Degree：1180～1230mm), 65 inches of (cross-directional length：1400～1450mm), 75 inches of (cross-directional length：1600～
1700mm), 85 inches of (cross-directional length：1800～1900mm) screen size curved surface image display panel.Screen chi
Very little bigger, then the size of each component parts is also bigger, and when curving, effect in concave side polarization plates has compression stress, and
And polarization plates are inconsistent with the size generation of image-displaying member, thus it is particularly easy to the stripping of polarization plates, floats.This
Outward, the aspect ratio in screen be 3: 4 image display panel in the stripping of polarization plates be less likely to occur, float, but in screen
Aspect ratio is 9: 13～9: 23, is preferably more than 9: 15, is more preferably less than 9: 19, such as 9: 16 or 9: 21 image grown crosswise
In display floater, when curving, in concave side polarization plates, effect has compression stress, and polarization plates and image-displaying member
Size produce inconsistent, thus be particularly easy to produce polarization plates stripping, float.The polarization plates of the present invention are for curved surface state
Under stripping, float there is high inhibition, therefore can be suitably used as various screen sizes as above, outstanding
Its larger screen size or the polarization plates of the curved surface image display panel grown crosswise.
The curved surface image display panel of the present invention comprising the polarization plates of the present invention suppresses inclined under long-term and/or warm environment
Vibration plate is from the stripping of image display panel, excellent in terms of the effect that floats.
Embodiment
Hereinafter, the present invention is described in detail to enumerate embodiment and comparative example, the invention is not restricted to these embodiments.
1. the making of polarizing coating
Polyvinyl alcohol film (strain formula meeting by average degree of polymerization about 2,400,60 μm of the thickness of 99.9 moles of more than % of saponification degree
The trade name " VF-PE#6000 " of society kuraray) in 30 DEG C of pure water impregnate after, in 30 DEG C of matter in iodine/potassium iodide/water
Amount ratio is impregnated in 0.02/2/100 aqueous solution.Afterwards, 56.5 DEG C of mass ratioes in potassium iodide/boric acid/water be 12/
Impregnated in 5/100 aqueous solution.Then, after film being washed using 8 DEG C of pure water, it is dried at 80 DEG C, obtains
On polyvinyl alcohol film, gas absorption quantity has the polarizing coating of iodine.Stretching is mainly carried out in iodine staining and boric acid are processed, total stretching
Multiplying power is 6.0 times.The thickness of so obtained polarizing coating is 22 μm.
2. the making of protective layer (protection makes) prepares
As described below, make or prepared various protective layers (protecting film).
(1) acrylic resin makes (2-A)
Metha crylic resin 70 mass % and rubber particles 30 mass % are mixed with high-speed mixer, for
This mixture 100 mass % adds enumerate BTA system UV absorbent 2 mass %, carries out melting mixing with double screw extruder
Make granule.This granule is put intoSingle screw extrusion machine, is extruded via 275 DEG C of T-shaped mould of design temperature, uses
Two polishing roll clamping films with minute surface are thus cooled down, and have obtained the acrylic resin film (2-A) of 80 μm of thickness.
It should be noted that as above-mentioned metha crylic resin, using methyl methacrylate/acrylic acid methyl ester=
The copolymer of 96%/4% (mass ratio).In addition, as above-mentioned rubber particles, using the elastomer particle of three-decker, interior
Layer is constituted using the rigid polymer that a small amount of allyl methacrylate is polymerized by methyl methacrylate, in
Interbed by with butyl acrylate as main component, further using styrene and a small amount of allyl methacrylate be polymerized and
The flexible elastomeric becoming is constituted, and outermost layer is by being polymerized using a small amount of ethyl acrylate in methyl methacrylate
Rigid polymer is constituted, and the mean diameter to the elastomer as intermediate layer of described elastomer particle is 240nm.Need
Illustrate, in this rubber particles, innermost layer is overall 70% of particle with total quality in intermediate layer.
(2) there is the acrylic resin film (2-B) of hard conating
Above-mentioned acrylic resin film (2-A) carries out hard conating process.It is molten that hard conating process passes through coating process
Liquid (pentaerythritol triacrylate：42.5 mass parts, IRGACURE 184：0.25 mass parts, organosilicon (levelling agent)：0.1 matter
Amount part, silicon dioxide (1 μm of mean diameter)：Silicon dioxide (the organic one-tenth in surface modified by 12 mass parts, surface methyl groups acryloyl group
Point：4.05×10-3g/m2)：7.5 mass parts, toluene：34 mass parts), after being dried, irradiated purple using ultraviolet radiation device
Outside line, is thus carried out.Resulting in acrylic resin film (the 2-B) (integral thickness of the hard conating with 5 μm of thickness：85μ
m).
(3) TAC film (2-C)
The tri acetyl cellulose film " KC6UAW " (60 μm of thickness) of Konica Minolta Opto Co. Ltd. system is made
For TAC film (2-C).
(4) TAC film (2-D)
On above-mentioned (2-C) TAC film, carry out hard conating process in the same manner as (2-B).Resulting in thickness 5 μ
TAC film (the 2-D) (integral thickness of the hard conating of m：65μm).
(5) COP makes (2-E)
Will be (thick for the biaxial stretch-formed resin film of cyclic polyolefin hydrocarbon system " ZEONOR FILM ZB 12 " of Zeon Corp
52 μm of degree) as COP film (2-E).
3. the preparation of bonding agent
The ultra-violet solidified bonding agent that mix following gradation composition obtained from no-solvent type is used as bonding agent.Separately
Outward, % represents the content (quality %) when bonding agent is integrally set to 100 mass %.
3,4- epoxycyclohexyl-methyl -3 ', 4 '-epoxy hexane carboxylate (Daicel chemical industry Co. Ltd. system
" CELLOXIDE 2021P ")：80%
BDDE：19%
Light cationic polymerization initiator (CPI-100P with triaryl matte hexafluorophosphate as main component：With three virtues
Base sulfonium hexafluorophosphate is the carbonic allyl ester solution of effective ingredient 50% of main component, Sanapro Co. Ltd. system
“CPI-100P”)：1%
4. the preparation of binding agent
Possessing condensing tube, putting into ethyl acetate 81.8 mass in the reaction vessel of nitrogen ingress pipe, thermometer and blender
Part, butyl acrylate 70.8 mass parts, acrylic acid methyl ester. 20.0 mass parts, acrylic acid 2- phenoxy ethyl 8.0 mass parts, propylene
Sour 2- hydroxy methacrylate 1.0 mass parts and acrylic acid 0.6 mass parts, are allowed to not oxygen-containing with the air in nitrogen replaceable equipment, with this
Interior temperature is increased to 55 DEG C simultaneously.Afterwards, adding all will be molten for azodiisobutyronitrile 0.14 mass parts as polymerization initiator
Solution in ethyl acetate 10 mass parts.The interpolation of polymerization initiator keeps this temperature in latter 1 hour, then will keep internal temperature at
While 54～56 DEG C, with adding speed 17.3 mass parts/hour into reaction vessel in be added continuously ethyl acetate, third
The moment that the concentration of olefin(e) acid system resin reaches 35 mass % stops adding ethyl acetate.And then, from the beginning of the interpolation of ethyl acetate
Rise and be incubated at such a temperature to through 12 hours.It is eventually adding ethyl acetate, adjust the concentration making acrylic resin
For 20 mass %.As acrylic resin.
According to following methods, the weight average molecular weight of obtained acrylic resin and number-average molecular weight are measured.?
Be connected in series in GPC device configuration " the TSKgel XL " of 4 TOSOH Co., Ltd and 1 Showa Denko K. K's system and
By clear light have trade relations Co., Ltd.'s sale " Shodex GPC KF-802 ", amount to 5 as post, oxolane is used as washing
De- liquid, gathers according to standard under conditions of sample solution concentration 5mg/mL, sample import volume 100 μ L, 40 DEG C of temperature, flow velocity 1mL/ minute
Styrene conversion is measured.Weight average molecular weight Mw of obtained acrylic resin is 1,420,000, Mw/Mn is 4.1.
Solid constituent 100 matter with respect to the acrylic resin (20 mass % ethyl acetate solution) hereinbefore prepared
Amount part, mixing is as glycydoxy trimethoxy silane (the liquid) (letter of 0.5 mass parts of silane based compound
More chemical industry Co. Ltd. system KBM-403), as the CORONATE HXR of 0.6 mass parts of cross-linking agent, (hexa-methylene two is different
The isocyanuric acid ester body of cyanate, the liquid of effective ingredient substantially 100 quality %, Japanese polyurethane Co. Ltd. system) and 3.0 matter
N- octyl group -4- picoline the hexafluorophosphate of amount part.Then, add ethyl acetate to make solids content concn is 13 matter
% is thus obtained binding agent for amount.
Embodiment 1
Film (2-D) as protective layer and film (2-E) use corona treatment (springtime Electric Co., Ltd's system) pre- advanced
Row sided corona treatment, coating adhesive thereon, fit in polarizing coating.Afterwards, make to glue using metal halide lamp irradiation ultraviolet radiation
Connect agent solidification.The layer of 20 μm of binding agent is formed on film (2-E) face, has obtained thickness 0.17mm and (do not included viscous for being formed
Close layer barrier film) concave side polarization plates A.
In addition, in addition to replacing film (2-D) using film (2-C), carry out, obtained thickness 0.16mm same as abovely
Convex side polarization plates B of (not including the barrier film for forming adhesive layer).
Polarization plates A are cut into the size of horizontal (cross-directional length) 1215mm × vertical (vertical-direction length) 683mm, this
When, cut by absorbing in the way of direction of principal axis is horizontal of polarization plates A.In addition, polarization plates B are cut into horizontal 1215mm × vertical
The size of 683mm, now, is cut with the direction of principal axis that absorbs of polarization plates B for longitudinal mode.By the polarization plates being cut into
A fits in the viewing side (concave side) of horizontal 1215mm × thick face glass of vertical 683mm, thickness 1.5mm, inclined by cut into
Vibration plate B fits in the rear side (convex side) of this panel.Afterwards, face glass bending is made mean radius of curvature be 4000mm
And be fixed, keep 250 hours under 80 DEG C of dry environments.After 250 hours, observe the outward appearance of panel by visual observation,
Result does not produce the stripping of polarization plates, floats.It is 0.8% by the size changing rate that said method measures.It should be noted that this
When, L1 (H+H1)/2R=0.25.
Embodiment 2
Film (2-B) as protective layer and film (2-E) use corona treatment (springtime Electric Co., Ltd's system) pre- advanced
Row sided corona treatment, coating adhesive thereon, fit in polarizing coating.Afterwards, make to glue by metal halide lamp irradiation ultraviolet radiation
Connect agent solidification.The layer of 20 μm of binding agent is formed on film (2-E) face, has obtained thickness 0.19mm and (do not included viscous for being formed
Close layer barrier film) concave side polarization plates C.
In addition, replacing film (2-B) using film (2-A), carrying out in addition same as abovely, having obtained thickness 0.18mm
Convex side polarization plates D.
Polarization plates C are cut into the size of horizontal 1215mm × vertical 683mm, now, with the absorption direction of principal axis of polarization plates C as horizontal stroke
To mode cut.In addition, polarization plates D are cut into the size of horizontal 1215mm × vertical 683mm, now, with polarization plates D
Absorb the mode that direction of principal axis is longitudinal to be cut.Polarization plates C cutting into are fitted in horizontal 1215mm × vertical 683mm, thickness
The viewing side (concave side) of the thick face glass of 1.5mm, polarization plates D cutting into is fitted in the rear side (convex surface of this panel
Side).Afterwards, panel bending is made mean radius of curvature be 4000mm and be fixed, keep 250 under 80 DEG C of dry environments
Hour.After 250 hours, observe the outward appearance of panel by visual observation, result does not produce the stripping of polarization plates, floats.With above-mentioned
The size changing rate that method measures is 1.4%.It should be noted that now, L1 (H+H1)/2R=0.26.
Embodiment 3
The size of polarization plates C and D is cut into the size of horizontal 1440mm × vertical 810mm, and polarization plates C and D are fitted
In horizontal 1440mm × thick face glass of vertical 810mm, thickness 1.5mm, it is 6600mm that panel bending is made mean radius of curvature
And be fixed, carry out similarly to Example 2 in addition, the stripping of the polarization plates in march faceplate panels, commenting of floating
Valency.As a result, not producing the significantly stripping of polarization plates, floating.The size changing rate that method described above measures is 1.4%.Need
Illustrate, now, L1 (H+H1)/2R=0.18.
Comparative example 1
In addition to the mean radius of curvature of panel is set to 2500mm, carry out similarly to Example 2, carried out curved surface
The stripping of the polarization plates in panel, the evaluation floating.As a result, concave side polarization plates C minor face produce from side end portion to
The floating from glass of 50mm.The size changing rate of the mensure of method described above is 1.4%.It should be noted that now, L1 (H
+ H1)/2R=0.41.
Embodiment 4
The size of polarization plates C and D is cut into the size of horizontal 1440mm × vertical 810mm, and polarization plates C and D are fitted
In horizontal 1440mm × thick face glass of vertical 810mm, thickness 1.5mm, carry out similarly to Example 2 in addition, if carrying out
The stripping of the polarization plates in curved surface panel, the evaluation floating, then L1 (H+H1)/2R=0.30, the significantly stripping of polarization plates, float
Generation be inhibited.
Embodiment 5
The size of polarization plates C and D is cut into the size of horizontal 1660mm × vertical 934mm, and polarization plates C and D are fitted
In horizontal 1660mm × thick face glass of vertical 934mm, thickness 1.5mm, carry out similarly to Example 2 in addition, if carrying out
The stripping of the polarization plates in curved surface panel, the evaluation floating, then L1 (H+H1)/2R=0.35, the significantly stripping of polarization plates, floating
The generation rising is inhibited.
Embodiment 6
The size of polarization plates C and D is cut into the size of horizontal 900mm × vertical 506mm, polarization plates C and D are fitted in horizontal stroke
900mm × thick the face glass of vertical 506mm, thickness 1.5mm, and the mean radius of curvature of panel is set to 2500mm, except this
Carry out similarly to Example 2 in addition, if the stripping of the polarization plates in march faceplate panels, the evaluation floating, L1 (H+H1)/
2R=0.30, the generation significantly peeled off, float of polarization plates is inhibited.
Embodiment 7
The size of polarization plates C and D is cut into the size of horizontal 508mm × vertical 286mm, polarization plates C and D are fitted in horizontal stroke
508mm × thick the face glass of vertical 286mm, thickness 1.5mm, and the mean radius of curvature of panel is set to 2500mm, except this
Carry out similarly to Example 2 in addition, if the stripping of the polarization plates in march faceplate panels, the evaluation floating, L1 (H+H1)/
2R=0.17, the generation significantly peeled off, float of polarization plates is inhibited.
Comparative example 2
In addition to the mean radius of curvature of panel is set to 2500mm, carry out similarly to Example 4, if carrying out curved surface
The stripping of the polarization plates in panel, the evaluation floating, then L1 (H+H1)/2R=0.49, there is the stripping of polarization plates, the product floating
Raw.
Comparative example 3
In addition to the mean radius of curvature of panel is set to 2500mm, carry out similarly to Example 5, if carrying out curved surface
The stripping of the polarization plates in panel, the evaluation floating, then L1 (H+H1)/2R=0.56, there is the stripping of polarization plates, the product floating
Raw.
Comparative example 4
In addition to the mean radius of curvature of panel is set to 1000mm, carry out similarly to Example 6, if carrying out curved surface
The stripping of the polarization plates in panel, the evaluation floating, then L1 (H+H1)/2R=0.76, there is the stripping of polarization plates, the product floating
Raw.
Comparative example 5
In addition to the mean radius of curvature of panel is set to 1000mm, carry out similarly to Example 7, if carrying out curved surface
The stripping of the polarization plates in panel, the evaluation floating, then L1 (H+H1)/2R=0.43, there is the stripping of polarization plates, the product floating
Raw.
Embodiment 8
The size of polarization plates A and B is cut into the size of horizontal 1050mm × vertical 600mm, and polarization plates A and B are fitted
In horizontal 1050mm × thick face glass of vertical 600mm, thickness 1.5mm, it is 2500mm that panel bending is made mean radius of curvature
And be fixed, carry out similarly to Example 1 in addition, carried out the stripping of polarization plates in curved surface panel, floated
Evaluate.As a result, there is not the significantly stripping of polarization plates, floating.The size changing rate that method described above measures is 0.8%.
It should be noted that now, L1 (H+H1)/2R=0.35.
5. the evaluation of pair bonding glass power
(1) mensure to bonding glass power
(a) " to bonding glass power (plane, 23 DEG C) " and the mensure of " to bonding glass power (curved surface, 23 DEG C) "
The flat state making in embodiment 1 and embodiment 2 and curved surface state bonding glass power is measured are used
Test film each one group in 50 DEG C, 5kg/cm2(490.3kPa, gauge pressure) implements the autoclave process of 20 minutes, then 23 DEG C,
24 hours are stood, using Shimadzu Seisakusho Ltd. Autograph (AGS-50NX) respectively by face glass and inclined under 50%RH environment
Vibration plate clamps, and peels off polarization plates with the speed of 300mm/ minute along 180 ° of direction.Using the peel strength thus measuring as " right
Bonding glass power (plane, 23 DEG C) " and " to bonding glass power (curved surface, 23 DEG C) ".Result is shown in table 1.
(b) " to bonding glass power (plane, 80 DEG C) " and the mensure of " to bonding glass power (curved surface, 80 DEG C) "
Respectively in embodiment 1 and embodiment 2 make flat state and curved surface state to bonding glass power survey
Surely use another group of test film in 50 DEG C, 5kg/cm2(490.3kPa, gauge pressure) implements the autoclave process of 20 minutes, Ran Hou
23 DEG C, stand 24 hours under 50%RH environment, afterwards, stand 250 hours under 80 DEG C of dry environments, using Shimadzu Seisakusho Ltd.'s system
Autograph (AGS-50NX), respectively by face glass and polarization board clamping, with the speed of 300mm/ minute along 180 ° of direction
Peel off polarization plates.Using the peel strength thus measuring as " to bonding glass power (plane, 80 DEG C) " with " to bonding glass power
(curved surface, 80 DEG C) ".Result is shown in table 1.
Table 1
Claims (9)
1. a kind of polarization plates, it is under mean radius of curvature R, the curved surface image display panel of thickness H and flat state
Cross-directional length is the polarization plates of L1,
When it fits in curved surface image display panel, the polarization plate thickness H1 becoming concave side meets following formula (1)：
L1 (H+H1)/2R≤0.4 (1),
The unit of described R, H, L1, H1 is mm.
2. polarization plates as claimed in claim 1, its measuring in a flat state in 23 DEG C, 50%RH to bonding glass
Power is more than 2.0N/25mm.
3. polarization plates as claimed in claim 1 or 2, cross-directional length L1 of described polarization plates in a flat state is
More than 500mm.
4. the polarization plates as any one of claims 1 to 3, the thickness H of described curved surface image display panel be 0.4mm with
On.
5. the polarization plates as any one of Claims 1 to 4, its size after 250 hours under 80 DEG C of dry environments becomes
Rate is less than 3%.
6. the polarization plates as any one of Claims 1 to 5, the polarizing coating in described polarization plates is drawn and/or dye
The polyvinyl alcohol film of color.
7. the polarization plates as any one of claim 1～6, described curved surface image display panel has 900～7000mm
Mean radius of curvature R.
8. a kind of curved surface image display panel, it is the curved surface picture display face comprising concave side polarization plates and convex side polarization plates
Plate, wherein, concave side polarization plates are the polarization plates any one of claim 1～7.
9. a kind of curved surface image display panel, it is the curved surface picture display face comprising concave side polarization plates and convex side polarization plates
Plate, wherein, the concave side polarization plates and convex side polarization plates polarization plates any one of claim 1～7.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-160879 | 2015-08-18 | ||
| JP2015160879 | 2015-08-18 | ||
| JP2016003684 | 2016-01-12 | ||
| JP2016-003684 | 2016-01-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106468797A true CN106468797A (en) | 2017-03-01 |
| CN106468797B CN106468797B (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610682019.8A Active CN106468797B (en) | 2015-08-18 | 2016-08-17 | Polarizing plate for curved image display panel |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6825848B2 (en) |
| KR (1) | KR102392232B1 (en) |
| CN (1) | CN106468797B (en) |
| TW (1) | TWI760310B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JPWO2019116760A1 (en) * | 2017-12-13 | 2020-12-17 | 株式会社ポラテクノ | Optical laminate, polarized lenses and eyewear equipped with it |
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Also Published As
| Publication number | Publication date |
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| JP2017126057A (en) | 2017-07-20 |
| TWI760310B (en) | 2022-04-11 |
| KR102392232B1 (en) | 2022-04-28 |
| CN106468797B (en) | 2020-04-14 |
| JP6825848B2 (en) | 2021-02-03 |
| TW201712376A (en) | 2017-04-01 |
| KR20170021754A (en) | 2017-02-28 |
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