CN106980148A - Polarization plates and image display device - Google Patents
Polarization plates and image display device Download PDFInfo
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- CN106980148A CN106980148A CN201710028965.5A CN201710028965A CN106980148A CN 106980148 A CN106980148 A CN 106980148A CN 201710028965 A CN201710028965 A CN 201710028965A CN 106980148 A CN106980148 A CN 106980148A
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- polarizer
- polarization plates
- functional layer
- principal axis
- modulus
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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
-
- 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
-
- 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
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to polarization plates and image display device.The present invention provides a kind of resistance to anti-thread breakage polarization plates improved in the environment of being contacted with water.The present invention provides a kind of polarization plates, it is the polarization plates of the functional layer comprising polarizer and at least one side for being laminated in polarizer, value obtained by the modulus of elasticity for the polarizer transmission direction of principal axis that functional layer is subtracted from the modulus of elasticity of the polarizer transmission direction of principal axis of polarizer is more than -1100MPa.
Description
Technical field
The present invention relates to a kind of polarization plates that can be used for various optical applications.It is somebody's turn to do moreover, it relates to which one kind has
The image display device of polarization plates.
Background technology
As the feed element of the polarised light of image display device, in addition, as the detecting element of polarised light, polarization plates are obtained
To widely using.In such a polarization plates, for example can suitably using being stretched, dyed to polyvinyl alcohol resin film,
Polarizer obtained by crosslinking etc..If cracked in polarizer, bad order is may result in, is claimed in addition, also resulting in
Make the not good situation optically of " light leak ".In the past, in order to prevent the crackle in polarizer from producing, various schemes (ginseng was proposed
According to patent document 1~5).
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2013-72951 publications
Patent document 2：Japanese Unexamined Patent Publication 2012-145645 publications
Patent document 3：Japanese Unexamined Patent Publication 2011-221278 publications
Patent document 4：Japanese Unexamined Patent Publication 2004-29367 publications
Patent document 5：Japanese Unexamined Patent Publication 2004-20830 publications
The content of the invention
Invent problem to be solved
Crackle in polarizer produce may by it is various will be because caused by.Representational reason is, possible because being used in product
The temperature change (thermal shock) drastically of middle exposed surrounding atmosphere and crack, in this case, it is possible to use thermal shock
Accelerated test, for example, utilize the experiment (patent document 2) of the thermal cycle between -40 DEG C and 85 DEG C that 20 circulations are repeated
Or the experiment (patent document 4) of the thermal cycle between -35 DEG C and 85 DEG C of 500 circulations is repeated to evaluate crackle generation
Degree.In addition, in manufacture course of products, base material film and stacking will be provided with thereon and the polarizer layer that stretches
Polarizability stacked film to diaphragm transfer when (patent document 3) or to comprising polarizer polarization plates carry out cutting processing when (specially
Sharp document 4) it may be cracked because of the power (physical/mechanicalness impact) applied, in this case, can after these operations
To confirm the degree of crackle generation.
This is directed to, it is probably to be produced because of the condensation that may occur in product use that the present inventor etc., which is conceived to crackle,.
Because condensation can cause the contact with water, it can be considered that being due to by simple thermal shock or physics with as described above
Property/the different mechanism of the crackle that causes of mechanicalness impact and crack.
It is an object of the present invention to provide a kind of resistance to anti-thread breakage polarization plates improved in the environment of being contacted with water.
Method for solving problem
The result of study of the present inventor etc. distinguishes, make to be fitted with a glass comprising polarizer and be laminated in its at least one
The crackle that the sample of the polarization plates of the functional layer in face receives to simulate condensation promotes experiment (including dipping into water), its result
It is that substantially can be cracked to extension on direction of principal axis is absorbed from the end face on the side of the transmission direction of principal axis along polarizer.In addition,
The present inventor etc. obtains following personal opinion, i.e. be laminated in the polarizer transmission of the functional layer of at least one side of polarizer
The modulus of elasticity of direction of principal axis is smaller, is more difficult to crack in the environment of contacting with water, the bullet of the transmission direction of principal axis of polarizer
Property modulus and above-mentioned functions layer polarizer transmission direction of principal axis modulus of elasticity difference it is bigger, be more difficult in the environment of being contacted with water
To crack, and further further investigation is carried out, as a result completed the present invention.
The present invention includes following [1]~[7].
[1] a kind of polarization plates, are the polarization plates of the functional layer comprising polarizer and at least one side for being laminated in polarizer,
The polarizer that functional layer is subtracted from the modulus of elasticity of the polarizer transmission direction of principal axis of polarizer transmits the modulus of elasticity of direction of principal axis
Obtained by value be more than -1100MPa.
[2] polarization plates according to described in [1], wherein, functional layer includes diaphragm.
[3] polarization plates according to described in [1] or [2], wherein, functional layer includes phase retardation film.
[4] polarization plates recorded according to any one of [1]~[3], wherein, functional layer is laminated with the one side of polarizer,
Adhesive phase is laminated with the another side of polarizer.
[5] polarization plates recorded according to any one of [1]~[4], wherein, the outmost surface layer in a surface side of polarization plates
It is laminated with adhesive phase or the adhesive phase with peel ply.
[6] polarization plates according to described in [4] or [5], wherein, the polarizer of adhesive phase transmits the springform of direction of principal axis
Measure as below 1000kPa.
[7] a kind of image display device, it is comprising any in liquid crystal cells or organic electroluminescent device and [1]~[6]
The polarization plates that item is recorded.
Invention effect
According to the present invention it is possible to provide the resistance to anti-thread breakage polarization plates improved in the environment of being contacted with water.In addition, root
According to the present invention, the image display device with the polarization plates can be provided.The present invention polarization plates and image display device for
Condensation can show high resistance to anti-thread breakage.
Brief description of the drawings
Fig. 1 represents the constructed profile of the polarization plates of an embodiment of the invention.
Fig. 2 represents the constructed profile of the polarization plates of another embodiment of the invention.
Fig. 3 represents the constructed profile of the polarization plates of another embodiment of the invention.
Fig. 4 represents the constructed profile of the image display device of an embodiment of the invention.
Embodiment
Hereinafter, the polarization plates and image display device to the present invention are described in detail, but the present invention is not limited to these
Embodiment.
Functional layer of the polarization plates of the present invention comprising polarizer and at least one side for being laminated in polarizer.For example, in this hair
In a bright embodiment, as shown in figure 1, polarization plates 10 can include polarizer 1, be laminated in first work(on its two sides respectively
The functional layer 5 of ergosphere 3 and second.The polarization plates of the present invention can be also on the surface of one surface side, the polarization plates such as shown in Fig. 2
11 like that in the face with the opposite side of polarizer 1 of at least one functional layer (being the second functional layer 5 in the mode of diagram), stacking
There is adhesive phase 7, the adhesive phase 7 there can be peel ply (not shown) in outmost surface, can also not have peel ply.This
In the other embodiment of invention, as shown in figure 3, polarization plates 12 can include polarizer 1, be laminated in the functional layer of its one side
3 and be laminated in polarizer 1 another side adhesive phase 7.But, the composition (lamination order etc.) of polarization plates of the invention is simultaneously
These embodiments are not limited to, as long as the functional layer comprising polarizer and at least one side for being laminated in polarizer, can have
It is arbitrary to constitute.
So-called " polarizer " of the present invention, is the component with the function that the light such as natural light are transformed to rectilinearly polarized light,
With the axis of homology and absorption axiss.Transmission light when the transmission direction of principal axis of polarizer can be understood as making the natural light pass through polarizer
Direction of vibration.On the other hand, the absorption axiss of polarizer and the axis of homology of polarizer are orthogonal.Moreover, in general, polarizer can be with
For stretched film, the absorption direction of principal axis of polarizer can be with its draw direction (MD) unanimously, and the transmission direction of principal axis of polarizer can be with
Width (TD) is consistent.
" functional layer " so-called in the present invention, refers to polarizer be played or assigned certain function, for example physical, machinery
The layer set for the purpose of property and/or optics sexual function.Functional layer is laminated in polarizer with arbitrary appropriate method, for example can be with
It is gluing with polarizer using adhesive.
Can be any one of them such as improving film comprising diaphragm, phase retardation film, brightness in the functional layer
The individual layer or arbitrary more than 2 layers of layered product planted.As long as diaphragm can play the film of the function of protection polarizer,
Can not have optical function, or can also be the film for having optical function concurrently, for example, can be also as phase retardation film or bright
Degree improves the film that film etc. plays a role.Alternatively, it is also possible in the opposite side face shape of the side gluing with polarizer of diaphragm
Into there is the layers such as hard conating, anti-reflection layer, antiglare layer.And the non-limiting meaning of the invention, functional layer can be single diaphragm,
Can also be diaphragm with the product of fitting of phase retardation film etc..
The polarization plates of the present invention meet following condition, i.e. transmit the modulus of elasticity of direction of principal axis from the polarizer of polarizer
In subtract functional layer polarizer transmission direction of principal axis modulus of elasticity obtained by value (Δ E, hereinafter also referred to as " modulus of elasticity
Difference ") it is more than -1100MPa (meeting following formula (1)).
Δ E=EP- EF>=-1100 (1)
EP：The polarizer of polarizer transmits the modulus of elasticity (MPa) of direction of principal axis
EF：The polarizer of functional layer transmits the modulus of elasticity (MPa) of direction of principal axis
The term " polarizer transmission direction of principal axis " of the present invention, refers to parallel or substantially parallel with the transmission direction of principal axis of polarizer
The direction of (angle is within ± 7 degree).
Because above-mentioned elastic modulus difference Δ E is more than -1100MPa, and resistance to anti-thread breakage carrying of making in the environment of being contacted with water
Height, can provide the polarization plates of excellent in te pins of durability.The polarization plates of the present invention will not also be led in the environment of it can produce condensation
Cause light leak (light leak when observe with polarizing microscope in Nicol crossed), rupture etc., it can show good inclined
Shake characteristic.Elastic modulus difference Δ E is even more preferably about more than -1000MPa, and the upper limit is not particularly limited, and is, for example, about 3000MPa
Hereinafter, in particular about below 2500MPa, preferably below 2000MPa, more preferably below 1500MPa.
The polarizer of polarizer transmits the elastic modulus E of direction of principal axisPCan according to raw material and preparation method of polarizer etc. without
Together, it such as can be about 3500~6000MPa, more preferably preferably below 5500MPa, below 5000MPa.For polarizer
Polarizer transmit direction of principal axis elastic modulus EP, in order to increase elastic modulus difference Δ E=EP- EF, preferably it is allowed to bigger.It is another
Aspect, from the viewpoint of the crackle that can be produced when suppressing and polarization plates being formed with processing, the polarizer transmission of polarizer
The elastic modulus E of direction of principal axisPIt is preferred that smaller.The polarizer of polarizer transmits the elastic modulus E of direction of principal axisPDuring for above range, easily
In terms of these are had concurrently.And the non-limiting meaning of the invention, for example polyvinyl alcohol resin film is received stretching, dyeing, boron
In the case of polarizer obtained from crosslinking in acid solution etc., contained by increasing stretching ratio, improving the boron in polarizer
Rate, and/or the crosslinking agent imported beyond the boric acid such as glyoxal, glutaraldehyde, can further increase the polarizer transmission of polarizer
The modulus of elasticity of direction of principal axis.
The modulus of elasticity of the polarizer transmission direction of principal axis of polarizer is as given temperature (representational situation is 23 DEG C)
Under polarizer polarizer transmission direction of principal axis tensile modulus of elasticity (MPa) determine.More specifically, cut out from polarizer
Test film, under given temperature environment, the polarizer transmission direction of principal axis both ends of test film are clamped with testing machine and along polarization
Piece transmission direction of principal axis drawing, is calculated according to the slope of the straight line at the initial stage of thus obtained load-deformation curve.
The polarizer of functional layer transmits the elastic modulus E of direction of principal axisFCan be had according to the composition of functional layer, optical characteristics
Without or degree etc. and it is different, for example can be from about 1000~10000MPa scope, according to the polarizer axis of homology of polarizer
The elastic modulus E in directionPProperly selected in the way of meeting above-mentioned formula (1).Direction of principal axis is transmitted for the polarizer of functional layer
Elastic modulus EF, in order to increase elastic modulus difference Δ E=EP- EF, preferably it is allowed to smaller.And the non-limiting meaning of the invention,
Reduce the degree of orientation in the case of by the way that there is orientation in functional layer, and/or do not have ring structure etc. in main chain just
Property structure the material of composition constitute functional layer, can make functional layer polarizer transmit direction of principal axis modulus of elasticity it is smaller.
Moreover, for " the polarizer transmission direction of principal axis " of functional layer, in the case where functional layer is laminated in into polarizer, referring to and polarizing
The direction of the transmission direction of principal axis parallel or substantially parallel (angle is within ± 7 degree) of piece.
The modulus of elasticity of the polarizer transmission direction of principal axis of functional layer is as given temperature (representational situation is 23 DEG C)
Under functional layer polarizer transmission direction of principal axis tensile modulus of elasticity (MPa) determine.More specifically, cut out from functional layer
Test film, under given temperature environment, the polarizer transmission direction of principal axis both ends of test film are clamped with testing machine and along polarization
Piece transmission direction of principal axis drawing, can be calculated according to the slope of the straight line at the initial stage of thus obtained load-deformation curve.
It is being laminated with the feelings of the first functional layer 3 and the second functional layer 5 respectively on the two sides of polarizer 1 as shown in Figures 1 and 2
Under condition, polarization plates of the invention meet following condition, i.e. subtract from the modulus of elasticity of the polarizer transmission direction of principal axis of polarizer
Removing the polarizer of the first functional layer, to transmit value obtained by the modulus of elasticity of direction of principal axis be more than -1100MPa, and from polarizer
Polarizer transmission direction of principal axis modulus of elasticity in subtract the second functional layer polarizer transmission direction of principal axis modulus of elasticity and obtain
Value be more than -1100MPa.In this case, the E in above-mentioned formula (1)FDirection of principal axis is transmitted in the polarizer of the first functional layer
The polarizer of modulus of elasticity and the second functional layer transmit direction of principal axis modulus of elasticity it is identical when be the value, can be by appointing when different
The value of one big side of meaning is represented.
As shown in Figures 2 and 3, (there is peel ply on its surface in the adhesive phase 7 that can be included in polarization plates of the invention
In the case of, it is after peel ply is divested) it may be used to polarization plates 11,12 and fitted with other components.
The modulus of elasticity of the polarizer transmission direction of principal axis of the adhesive phase can be below 5000kPa, preferably 1000kPa
Hereinafter, thus, connect with water polarization plates folder can be effectively improved when adhesive phase and liquid crystal display device etc. are fitted
It is resistance to anti-thread breakage under tactile environment.Adhesive phase polarizer transmission direction of principal axis modulus of elasticity be even more preferably about 500kPa with
Under, more preferably below 150kPa.The lower limit of the modulus of elasticity of the polarizer transmission direction of principal axis of adhesive phase is not special
Limit, for example, can be about more than 50kPa.And the non-limiting present invention, for example, by coordinating amino first in known adhesive
The oligomer such as acid esters acrylic ester oligomer, and/or the crosslinking agents such as isocyanates system crosslinking agent are added, it is possible thereby to will bonding
The polarizer of oxidant layer is adjusted to above range through the modulus of elasticity of direction of principal axis.The polarizer of adhesive phase passes through the bullet of direction of principal axis
Property modulus be above range when, can easily take into account the suppression and the relaxation of stress of the change in size of polarization plates.Moreover, for viscous
" the polarizer transmission direction of principal axis " of mixture layer, in the case where adhesive phase is laminated in into polarizer, refers to saturating with polarizer
Penetrate the direction of direction of principal axis parallel or substantially parallel (angle is within ± 7 degree).
The modulus of elasticity of the polarizer transmission direction of principal axis of adhesive phase is that (representational situation is 23 as given temperature
DEG C) under adhesive phase polarizer transmission direction of principal axis tensile modulus of elasticity (kPa) determine.More specifically, from adhesive
Layer in cut out test film, under given temperature environment, clamped with testing machine test film polarizer transmission direction of principal axis both ends and
Along polarizer transmission direction of principal axis drawing, it can be calculated according to the slope of the straight line at the initial stage of thus obtained load-deformation curve
Go out.
Such as polarization plates 11 can be pressed from both sides as shown in Figure 4 fits across adhesive phase 7 with other components 15, pie graph picture
Display device 20.Other components are not particularly limited, such as can be liquid crystal cells, organic electroluminescent device, represent
Property in the case of can constitute their glass plate on press from both sides across adhesive phase fit polarization plates.Image display device is in liquid crystal
Liquid crystal display device is referred to as in the case of unit, it is aobvious referred to as organic electroluminescent in the case of organic electroluminescent device
Showing device.But, image display device of the invention is not limited to the embodiment, as long as including liquid crystal cells or Organic Electricity
The polarization plates of electroluminescent element and the present invention, can have and arbitrarily be suitably composed.
Hereinafter, for the polarization plates and image display device of the present invention, it will be carried out by their manufacture method more detailed
Explanation.
In order to manufacture the polarization plates of the present invention, prepare polarizer, functional layer, be also prepared for bonding in a situation of use where in addition
Oxidant layer.
[polarizer]
Polarizer can polyvinyl alcohol resin film is received stretching, dyeing, crosslinking in boric acid solution etc. and is obtained
Polarizer.
As polyvinyl alcohol resin, it can use resin obtained by polyvinyl acetate system resin saponification.As poly-
Vinyl acetate system resin, in addition to it can exemplify the polyvinyl acetate as the homopolymer of vinyl acetate, may be used also
To exemplify vinyl acetate and the copolymer of other monomers that can be copolymerized therewith.As can be with vinyl acetate copolymerization
Other monomers, for example, can enumerate unsaturated carboxylic acid, alkene, vinyl ethers, unsaturated sulfonic acid, the acrylamide with ammonium
Deng.
The saponification degree of polyvinyl alcohol resin can be 80 moles of more than % scope, preferably 90 moles more than %, more
Preferably 95 moles more than % scope.Polyvinyl alcohol resin can also be the modified polyvinylalcohol that a part has been modified,
The alkene such as can enumerate polyvinyl alcohol resin ethene and propylene；Acrylic acid, methacrylic acid and crotonic acid etc. are no
Saturated carboxylic acid；The resin that Arrcostab and acrylamide of unsaturated carboxylic acid etc. have been modified.The average polymerization of polyvinyl alcohol resin
Degree is preferably 100~10000, more preferably 1500~8000, more preferably 2000~5000.
Polarizer for example can be by carrying out uniaxial tension to the raw material film being made up of polyvinyl alcohol resin and using water
It is allowed to be swelled and (be swelled process), (dyeing process) is dyed with dichroism pigment, is allowed to be crosslinked (crosslinking work with boric acid aqueous solution
Sequence), (matting) is cleaned with water, is finally allowed to dry (drying process) and manufacture.
The uniaxial tension of polyvinyl alcohol resin film can be the dry type stretching stretched in the air, be drawn in bath
Any one for the wet tensile stretched, can also carry out the both sides of these stretchings.In order to increase the polarizer axis of homology of polarizer
The elastic modulus E in directionP, preferably implemented with the wet tensile for the raising for being conducive to stretching ratio.For wet tensile, for example
Can be between above-mentioned dyeing process and/or cross-linking process step and/or front and rear, by polyvinyl alcohol resin film immersion in processing
Implement stretching in the state of in bath.When implementing uniaxial tension, polyvinyl alcohol resin film can be made different by peripheral speed
Roller between and stretched, can also be stretched using the method for clamping polyvinyl alcohol resin film with hot-rolling.Poly- second
The final stretching ratio of enol resin film is usually 4~8 times or so.
It is swelled in process, makes polyvinyl alcohol resin membrane swelling with water.Swelling treatment can be by making polyethenol series tree
Adipose membrane is impregnated in water to implement.The temperature of water is, for example, 10~70 DEG C, and dip time is, for example, 10~600 seconds or so.
In dyeing process, polyvinyl alcohol resin film is dyed with dichroism pigment, film is adsorbed dichroism pigment.Dyeing
Processing for example makes polyvinyl alcohol resin film immersion in the aqueous solution containing dichroism pigment.As dichroism pigment,
Specifically, iodine or dichroic dye can be used.
In the case where using iodine as dichroism pigment, generally using by polyvinyl alcohol resin film immersion in containing iodine
And the method dyed in the aqueous solution of KI.For the content of the iodine in the aqueous solution, in every 100 parts by weight water, lead to
Can be often 0.003~1 parts by weight or so.For the content of the KI in the aqueous solution, in every 100 parts by weight water, generally
It is 0.1~20 parts by weight or so.The temperature of the aqueous solution is usually 10~45 DEG C or so, and dip time is usually 30~600 seconds
Left and right.
On the other hand, in the case where using dichroic dye as dichroism pigment, generally use polyethenol series
Resin film is impregnated in the method dyed in the aqueous solution containing water-soluble dichroic dye.For the dichroism in the aqueous solution
The content of dyestuff, in every 100 parts by weight water, typically 1 × 10- 3~1 parts by weight or so.The aqueous solution can also contain sulphur
The inorganic salts such as sour sodium.The temperature of the aqueous solution is usually 20~80 DEG C or so, and dip time is usually 20~600 seconds or so.
Cross-linking process step is, for example, to make to carry out in boric acid aqueous solution through hyperchromatic polyvinyl alcohol resin film immersion.It is right
The content of boric acid in boric acid aqueous solution, in every 100 parts by weight water, usually 1~15 parts by weight or so, preferably 2~
10 parts by weight.In the case where using iodine as dichroism pigment, the boric acid aqueous solution preferably comprises KI.For boric acid water
The content of KI in solution, in every 100 parts by weight water, usually 1~20 parts by weight or so, preferably 5~15 weight
Part.Dip time of the film in boric acid aqueous solution is usually 10~600 seconds or so, preferably more than 20 seconds, it is additionally preferred to be 300
Below second.The temperature of boric acid aqueous solution is usually more than 50 DEG C, preferably 50~70 DEG C.In boric acid aqueous solution, it can also make
For pH adjusting agent addition sulfuric acid, hydrochloric acid, acetic acid, ascorbic acid etc..Boric acid aqueous solution can use different 2 such as composition and temperature
The aqueous solution of kind of the above, in this case, it is preferred that so that the boric acid aqueous solution below boric acid compared with initial boric acid aqueous solution is dense
The low mode application of degree.
Generally to receive the matting using water by the polyvinyl alcohol resin film of cross-linking process step.Cleaning treatment is for example
It is the polyvinyl alcohol resin film immersion by crosslinking Treatment is carried out in water.The temperature of water in cleaning treatment is usually
5~40 DEG C or so, dip time is usually 2~120 seconds or so.
Thereafter, by drying process, polarizer can be obtained.Drying typically uses air drier or far infrared adds
Hot device is carried out.Drying temperature is usually 40~100 DEG C, and drying time is usually 30~600 seconds or so.
The thickness of polarizer for example can be about 5~30 μm.It is excellent from that can obtain on the boron containing ratio of polarizer
From the viewpoint of durability, preferably more than 1.5 weight %, more preferably more than 2.0 weight %, further preferred 3.0 weight %
More than, from the viewpoint of the contraction or curling (warpage) of the polarization plates caused by it can suppress temperature change, preferably 5.5 weights
Measure below %, more preferably below 5.0 weight %.
[functional layer]
Functional layer can be diaphragm in the case of representational.Diaphragm can be by thermoplastic resin constitute it is transparent
Resin film.As thermoplastic resin, for example, it can enumerate chain polyolefin-based resins and the ring-type by taking polypropylene-based resin as an example
The polyolefin-based resins such as polyolefin-based resins；The cellulose esters such as cellulosic triacetate and cellulose diacetate system resin；It is poly-
The polyester based resins such as ethylene glycol terephthalate, PEN and polybutylene terephthalate (PBT)；Poly- carbon
Acid esters system resin；(methyl) acrylic ester resin in plexiglass；Or they it is at least two kinds of with
On mixture etc..Alternatively, it is also possible to use the copolymer at least two kinds of monomers above for constituting above-mentioned resin.
Cyclic polyolefin hydrocarbon system resin is usually the general name of resin polymerizeing using cyclic olefin as polymerized unit, for example can be with
Enumerate Japanese Unexamined Patent Publication 1-240517 publications, Japanese Unexamined Patent Publication 3-14882 publications, Japanese Unexamined Patent Publication 3-122137
Resin described in publication etc..If enumerating the concrete example of cyclic polyolefin hydrocarbon system resin, for the open loop (common) of cyclic olefin
The chain olefin of polymer, the addition polymer of cyclic olefin, ethene and propylene etc. and the copolymer of cyclic olefin are (representational
Situation is random copolymer) and the graft polymers for being modified them with unsaturated carboxylic acid or derivatives thereof and they
Hydride etc..Wherein, the ENB system of the norborneol alkene monomers such as ENB, condensed ring norborneol alkene monomer has been used
Resin is used preferably as cyclic olefin.
Cyclic polyolefin hydrocarbon system resin has various products commercially to sell.It is used as the commercially available product of cyclic polyolefin hydrocarbon system resin
Example, is represented with trade name, have TOPAS ADVANCED POLYMERS GmbH production, in Japan by Polyplastics plants
Formula commercial firm sale " TOPAS " (registration mark), sold by JSR Corp. " ARTON " (registration mark), by Japanese ZEON
" ZEONOR " (registration mark) and " ZEONEX " (registration mark) of Co., Ltd.'s sale, sold by Mitsui Chemicals, Inc
" APEL " (registration mark) etc..
Alternatively, it is also possible to which the commercially available product of manufactured cyclic polyolefin resin film is used as diaphragm.It is used as city
The example of product is sold, is represented with trade name, can enumerating " the ARTON films " sold by JSR Corp., (" ARTON " is identical
The registration mark of company), " ESCENA " (registration mark) and " SCA40 " sold by Sekisui Chemical Co., Ltd, by day
" ZEONOR FILM " (registration mark) etc. of this ZEON Co., Ltd. sale.
Cellulose esters system resin is usually the ester of cellulose and aliphatic acid., can as the concrete example of cellulose esters system resin
To enumerate cellulosic triacetate, cellulose diacetate, cellulose tripropionate, cellulose dipropionate etc..In addition, also may be used
With using making resin obtained by their copolymerization, by a part for hydroxyl with the resin modified of others substituents.Among them,
Particularly preferred cellulosic triacetate (triacetyl cellulose：TAC).Cellulosic triacetate has many products commercially to sell
Sell, be also advantageous from the aspect of easiness, cost is obtained.For the example of the commercially available product of cellulosic triacetate,
Represent there is " FUJITAC (registration mark) TD80 ", " FUJITAC (registrations sold by Fuji Photo Film Co., Ltd. with trade name
Trade mark) TD80UF ", " FUJITAC (registration mark) TD80UZ " and " FUJITAC (registration mark) TD40UZ ", Konica
TAC film " KC8UX2M ", " KC2UA " and " KC4UY " of Minolta Co. Ltd. systems etc..
Polyester based resin be with the resin beyond ester bond, above-mentioned cellulose-based resin, generally by polybasic carboxylic acid or
The resin that the condensation polymer of its derivative and polyalcohol is constituted.2 yuan of dicarboxylic acids can be used as polybasic carboxylic acid or derivatives thereof
Or derivatives thereof, it can for example enumerate terephthalic acid (TPA), M-phthalic acid, dimethyl terephthalate (DMT), naphthalene diformic acid dimethyl ester
Deng.2 yuan of glycol can be used as polyalcohol, for example, can enumerate ethylene glycol, propane diols, butanediol, neopentyl glycol, hexamethylene
Alkane dimethanol etc..The example of suitable polyester based resin includes polyethylene terephthalate.
Polycarbonate-based resin is the engineering plastic by constituting the polymer that monomeric unit is bonded by carbonate group
Material, is with high-impact, heat resistance, anti-flammability, transparent resin.Polycarbonate-based resin can also be to reduce
Photoelastic coefficient and the resin referred to as modified polycarbonate modified as polymer backbone improve wavelength dependence
Copolymerization polycarbonate of property etc..
(methyl) acrylic ester resin is the polymerization for including the Component units for coming from (methyl) acrylic ester monomer
Thing.The polymer is the polymer containing methacrylate in the typical case.Preferably come from methacrylate
The ratio of construction unit be the polymer for including more than 50 weight % relative to entire infrastructure unit.(methyl) acrylic ester
Resin can be the homopolymer of methacrylate or comprising the Component units for coming from other polymerizable monomers
Copolymer.In this case, the ratio for coming from the Component units of other polymerizable monomers is preferably relative to entire infrastructure list
Member is below 50 weight %.
It is used as the methacrylate that may be constructed (methyl) acrylic ester resin, preferably alkyl methacrylate.
As alkyl methacrylate, can enumerate methyl methacrylate, EMA, n propyl methacrylate,
Isopropyl methacrylate, n-BMA, Isobutyl methacrylate, Tert-butyl Methacrylate, metering system
The carbon number of the alkyl of sour 2- ethylhexyls, cyclohexyl methacrylate, 2-hydroxyethyl methacrylate etc be 1~
8 alkyl methacrylate.The carbon number of contained alkyl is preferably 1~4 in alkyl methacrylate.At (methyl)
In acrylic ester resin, methacrylate can only be used alone a kind, and can also use two or more.
As other the above-mentioned polymerizable monomers that may be constructed (methyl) acrylic ester resin, acrylic acid can be enumerated
Ester and others have the compound of polymerism carbon-to-carbon double bond in intramolecular.Other polymerizable monomers can be only independent
Using a kind, and two or more can also be used.It is used as acrylate, preferably alkyl acrylate., can be with as alkyl acrylate
Enumerate methyl acrylate, ethyl acrylate, n-propyl, isopropyl acrylate, n-butyl acrylate, i-butyl
The alkyl of ester, tert-butyl acrylate, 2-EHA, cyclohexyl acrylate, acrylic acid 2- hydroxy methacrylates etc
Carbon number is 1~8 alkyl acrylate etc..The carbon number of contained alkyl is preferably 1~4 in alkyl acrylate.
In (methyl) acrylic ester resin, acrylate can only be used alone a kind, and can also use two or more.
There is the compound of polymerism carbon-to-carbon double bond as others in intramolecular, ethene, propylene, benzene second can be enumerated
The vinyl cyanide compound of the vinyl compounds such as alkene, acrylonitrile etc.Others have polymerism carbon-to-carbon in intramolecular
The compound of double bond can only be used alone a kind, and can also use two or more.
As long as being contained in the scope of the present invention, functional layer can also have the optics such as phase retardation film and brightness raising film concurrently
The diaphragm of function.For example, (being stretched uniaxially or biaxially by being stretched to the transparent resin film being made up of above-mentioned material
Deng), on the film form liquid crystal layer etc., the phase retardation film for having been assigned arbitrary phase difference value can be made.Or, functional layer
Can be diaphragm with the product of fitting of phase retardation film etc..
In addition, functional layer can also on the surface with polarizer opposite side of functional layer, possess hard conating, antiglare layer,
The surface-treated layers (coating) such as anti-reflection layer, anti-static electricity interference layer and stain-proofing layer.Surface-treated layer can utilize known method
Formed.
In the case of setting the first functional layer and the second functional layer on the two sides of polarizer, this 2 functional layers both can phase
Together, can also be different.As the asynchronous example of functional layer, the species for the thermoplastic resin at least constituting functional layer can be enumerated
Different combinations；At least combination different in terms of the presence or absence of optical function of functional layer or its species；At least it is being formed at table
Different combination etc. in terms of the presence or absence of the surface-treated layer in face or its species.
From the viewpoint of the filming of polarization plates, the thickness of thin of preferred function layer, for example, less than 90 μm, preferably 60
Below μm, more preferably less than 50 μm, more preferably less than 30 μm.On the other hand, from the viewpoint of processability, function
Layer preferably has the thickness that may insure a certain degree of intensity, for example, more than 5 μm.
[adhesive phase]
As the adhesive for forming adhesive phase, known adhesive is selected, as long as may in polarization plates
There is the adhesive of the adhesivity for the degree that will not cause to come off etc. in the environment of being exposed.Specifically, it can enumerate
Acrylic adhesive, silicone-based adhesive, elastomeric adhesive etc., from the transparency, weatherability, heat resistance, processability side
Face consideration, particularly preferred acrylic adhesive.
In adhesive, as needed, tackifier, plasticizer can also be mated properly into, comprising glass fibre, glass
The filler of pearl, metal powder, other inorganic powder etc., pigment, colouring agent, filler, antioxidant, ultra-violet absorber,
The various additives such as anti-static electricity interference agent, silane coupler.
Adhesive phase typically by by the solution coating of adhesive on peel ply (mold release film) and dry and formed.To
Coating rolling method, spin-coating method, silk screen rubbing method, jetting type such as can use reversely coating, intaglio plate coating on peel ply
Rubbing method, dip coating, spray-on process etc..In addition it is also possible on peel ply coating adhesive, in the table of the adhesive phase formed
Face configures other peel ply, utilizes the form that peel ply is formed with the two sides of adhesive phase.
The thickness of adhesive phase is usually 3~100 μm or so, preferably 5~50 μm.
[manufactures of polarization plates]
By being laminated polarizer, functional layer according to required order, laminate adhesive oxidant layer is gone back in a situation of use where in addition,
The polarization plates of the present invention can just be manufactured.
The stacking of polarizer layer and functional layer can be implemented using arbitrary appropriate method, for example, can use adhesive
Make interlayer gluing.As adhesive, water system adhesive, active energy ray-curable adhesive or Thermocurable glue can be used
Stick etc., from the viewpoint of productivity ratio, preferably uses water system adhesive, active energy ray-curable adhesive.For institute
The thickness of gluing oxidant layer in the polarization plates obtained, such as then can be 0.01~0.2 μm or so, such as if water system adhesive
Fruit is active energy ray-curable adhesive, then can be 0.1~4 μm.
Water system adhesive is to dissolve adhesive component or adhesive obtained by being dispersed in water.The water system preferably used
Adhesive is, for example, the adhesive compound that polyvinyl alcohol resin or carbamate resins have been used as principal component.
In the case where using polyvinyl alcohol resin as the principal component of adhesive, the polyvinyl alcohol resin is except can
Be partly-hydrolysed polyvinyl alcohol, fully saponified polyvinyl alcohol etc polyvinyl alcohol resin beyond, can also be carboxy-modified
The process of polyvinyl alcohol, acetoacetyl modified polyvinyl alcohol, methylol-modified polyvinyl alcohol, amino modified polyvinyl alcohol etc
Modified polyvinyl alcohol resin.Polyvinyl alcohol resin is except that can be the poly- acetic acid to the homopolymer as vinyl acetate
Vinyl acetate is carried out obtained by saponification process beyond alcotex, can also be to vinyl acetate with can be copolymerized therewith
The copolymer of other monomers carries out polyvinyl alcohol based copolymer obtained by saponification process.
Water system adhesive using polyvinyl alcohol resin as adhesive component is usually the water-soluble of polyvinyl alcohol resin
Liquid.For the concentration of the polyvinyl alcohol resin in adhesive, relative to the parts by weight of water 100, usually 1~10 parts by weight, excellent
Elect 1~5 parts by weight as.
In order to improve adhesivity, the adhesive being made up of the aqueous solution of polyvinyl alcohol resin preferably comprises polyaldehyde, honey
Amine compound, zirconium dioxide compound, zinc compound, glyoxal, glyoxal derivative, water-soluble epoxy resin etc are consolidated
The property changed composition or crosslinking agent.As water-soluble epoxy resin, for example, polyamide polyamine epoxy resin can be suitably used, it is
Polyamide-amide is obtained using the reaction of the dicarboxylic acids such as polyalkylenepolyamines and adipic acid such as two sub- second triamines, tetramine,
Epichlorohydrin is set to react and obtain with gained polyamide-amide.As the commercially available product of the polyamide polyamine epoxy resin, it can enumerate
" Sumirez Resin 650 " (field ridge chemical industry (strain) system), " (the field ridge chemical industry (strain) of Sumirez Resin 675 "
System), " WS-525 " (Japanese PMC (strain) system) etc..These curability compositions or crosslinking agent addition (as curability into
Point and crosslinking agent be its total amount when adding together) relative to the parts by weight of polyvinyl alcohol resin 100, usually 1~100 weight
Part, preferably 1~50 parts by weight.Above-mentioned curability composition or crosslinking agent addition relative to polyvinyl alcohol resin 100
Parts by weight be less than 1 parts by weight in the case of, adhesivity improve effect have the trend diminished, in addition, the addition relative to
In the case that the parts by weight of polyvinyl alcohol resin 100 are more than 100 parts by weight, gluing oxidant layer has the trend become fragile.
In addition, suitable example when carbamate resins are used for the principal component as adhesive, can be enumerated
Polyester ionomer type carbamate resins and the mixture of the compound with glycidoxypropyl.So-called Polyester is from poly-
Thing type carbamate resins, are the carbamate resins with polyester backbone, and have imported on a small quantity ionic thereto
Composition (hydrophilic component).Because the ionomer type carbamate resins without using emulsifying agent are directly emulsified into breast in water
Liquid, is consequently adapted to the adhesive as water system.
Active energy ray-curable adhesive is because of the active-energy of ultraviolet, visible ray, electron beam, X-ray etc
The irradiation of ray and the adhesive solidified.In the case of using active energy ray-curable adhesive, polarization plates are had
Gluing oxidant layer be the adhesive solidified material layer.
Active energy ray-curable adhesive can contain as curability composition to be solidified because of cationic polymerization
The adhesive of epoxy based compound, is preferably to contain the ultra-violet solidified gluing of the epoxy based compound as curability composition
Agent.Described so-called epoxy based compound, refers to there is average more than 1, preferably more than 2 epoxy radicals in intramolecular herein
Compound.Epoxy based compound can both be used only a kind, and can also use two or more.
The concrete example for the epoxy based compound that can suitably use includes：Hydrogenated epoxy based compound (has ester ring type
The glycidol ether of the polyalcohol of ring), its be by carrying out hydrogenation to the aromatic rings of aromatic polyol, make epichlorohydrin with
The ester ring type polyol reaction of gained and obtain；The polyglycidyl ether of aliphatic polyol or its alkylene oxide adducts etc
Aliphatic epoxy based compound；Ester ring type epoxy based compound, it is to have more than 1 to be bonded with ester ring type ring in intramolecular
Epoxy radicals epoxy based compound.
Active energy ray-curable adhesive can replace above-mentioned epoxy based compound as curability composition, or
Contain therewith and belong to free-radical polymerised (methyl) acrylate based compound.It is used as (methyl) acrylic ester
Compound, can enumerate (methyl) acrylate monomer for having at least one (methyl) acryloxy in intramolecular；Make 2 kinds with
On containing functional group compound reaction and obtain and there is (methyl) third of at least two (methyl) acryloxy in intramolecular
Olefin(e) acid ester oligomer etc. contains the compound of (methyl) acryloxy.
Active energy ray-curable adhesive is containing the ring that solidifies by cationic polymerization as curability composition
In the case of oxygen based compound, light cationic polymerization initiator is preferably comprised., for example can be with as light cationic polymerization initiator
Enumerate aromatic diazonium salt；The salt such as aromatic iodonium salts or aromatic series sulfonium salt；Iron-arene complex etc..In addition, in activity
Energy ray-curable adhesive contains the free-radical polymerised curability composition of (methyl) acrylate based compound etc
In the case of, preferably comprise optical free radical polymerization initiator.As optical free radical polymerization initiator, for example, it can enumerate acetophenone system
Initiator, benzophenone series initiators, benzoin ether series initiators, thioxanthones series initiators, xanthone, fluorenes, camphorquinone, benzene
Formaldehyde, anthraquinone etc..
Before diaphragm is fitted in into polarizing coating, plasma can be carried out to the binding face of polarizing coating and/or diaphragm
The surface activation process of body processing, sided corona treatment, ultraviolet treatment with irradiation, flame (flame) processing, saponification process etc.Profit
The surface activation process is used, the adhesivity of polarizing coating and diaphragm can be improved.
In the case of using adhesive phase, it is possible to use the cohesive of its own, polarizer layer or functional layer are laminated in.
More specifically, can be by divesting the peel ply and will bond in the case where the lamination surface of adhesive phase has peel ply
Oxidant layer is transferred and is laminated to polarizer layer or functional layer.
[manufacture of image display device]
The polarization plates manufactured as described above folder is fitted in into other components (optical component) across adhesive phase, it is possible to
Obtain image display device.More specifically, in the case where the binding face of adhesive phase has peel ply, the stripping can be divested
Absciss layer, is fitted polarization plates to other components using the cohesive of adhesive phase.For example, by the way that polarization plates are fitted in into liquid crystal list
Member, can obtain liquid crystal display device, by fitting in organic electroluminescent device, can obtain ORGANIC ELECTROLUMINESCENCE DISPLAYS dress
Put.Existing product is used by the liquid crystal cells or organic electroluminescent device of laminating polarization plates.Liquid crystal cells are organic
Among electroluminescent cell, the inscape by directly laminating polarization plates is glass plate in the case of representational.
However, it should be noted that the purposes of the polarization plates of the present invention is not limited to image display device, it can be used for various
Optical applications.
[embodiment]
The ＞ of ＜ embodiments 1
(A) making of polarizer
Continuously transport the polyvinyl alcohol film (average degree of polymerization of long size：About 2400, saponification degree：99.9 moles of more than %,
Thickness：60 μm), being swelled in bath comprising 20 DEG C of pure water was immersed in the holdup time of 31 seconds and (is swelled process).Thereafter, make from
It is swelled in bath the film that pulls out and KI/water was immersed in as 30 containing iodine DEG C of 2/100 (weight ratio) using the holdup time of 122 seconds
Dye bath in (dyeing process).Then, the film pulled out from dye bath is made to be immersed in KI/boron with the holdup time of 70 seconds
During acid/water is bathed for 56 DEG C of crosslinking of 12/4.1/100 (weight ratio), next, being immersed in iodate with the holdup time of 13 seconds
Potassium/boric acid/water is (cross-linking process step) in 40 DEG C of the crosslinking bath of 9/2.9/100 (weight ratio).In dyeing process and cross-linking process step
In, carry out longitudinal uniaxial tension using stretching between the roller in bath.Total stretching ratio on the basis of raw material film is set to 5.5
Times.Then, make the film pulled out from crosslinking bath (clear after being immersed in the holdup time of 3 seconds in the cleaner bath comprising 5 DEG C of pure water
Wash process), 80 DEG C of drying oven was imported with the holdup time of 190 seconds and is dried (drying process), polarizer is obtained.This reality
The thickness for applying the polarizer obtained in example is 23.6 μm.
(B) making of polarization plates
The polarizer obtained in above-mentioned (A) is continuously transported, and continuously transports the first functional layer (first of long size
Diaphragm) (TAC film " KC8UX ", the thickness of Konica Minolta Opto Co. Ltd. systems：80 μm) and long size second
Functional layer (the second diaphragm) (TAC film " KC8UX ", the thickness of Konica Minolta Opto Co. Ltd. systems：80 μm),
To while injecting water system adhesive between polarizer and the first functional layer and between polarizer and the second functional layer, in doubling roller
Between by and obtain including the stacking of the functional layer of the gluing oxidant layer of the first functional layer/water system/gluing oxidant layer of polarizer/water system/second
Film.Next, the stacked film obtained by transporting, imports 60 DEG C of drying oven with the holdup time of 100 seconds and is heated, by
This dries the gluing oxidant layer of water system, obtains polarization plates.As above-mentioned water system adhesive, the aqueous solution obtained as follows has been used,
That is, it is pva powder (trade name " Gosefimer " of Japanese synthetic chemical industry (strain) system, average degree of polymerization 1100) is molten
Solution is in 95 DEG C of hot water, into the weight % of concentration 3 of gained polyvinyl alcohol water solution, relative to the weight of pva powder 10
Amount part is obtained with the ratio mixed cross-linker (sodiam glyoxlate of Japanese synthetic chemical industry (strain) system) of 1 parts by weight.
(C) making of the polarization plates with adhesive phase
Using the thickness that 25 μm are formed with peel ply (mold release film) commercially available acrylic adhesive piece it is commercially available
The adhesive phase of 25 μm of thickness is formed in product, the second functional layer of the polarization plates obtained in above-mentioned (B), is produced with bonding
The polarization plates of oxidant layer.
(D) polarizer of polarizer transmits the modulus of elasticity (tensile modulus of elasticity) of direction of principal axis
In the polarizer obtained from above-mentioned (A), cut out polarizer transmission direction of principal axis on long 100mm and polarizer inhale
Receive the rectangular test film of width 20mm on direction of principal axis.Then, cupping machine (Shimadzu Scisakusho Ltd's system is utilized
Autograph AG-1S testing machines) upper lower clamp, by make fixture at intervals of 5cm in the way of clamp the length of above-mentioned test film
Direction (polarizer transmission direction of principal axis) both ends are spent, in the environment of 23 DEG C, with the draw speed of 5mm/ minutes to test film edge
Length direction (polarizer transmission direction of principal axis) is stretched, the straight line at the initial stage in the load-deformation curve of gained it is oblique
Rate, the polarizer for calculating 23 DEG C of polarizer transmits the modulus of elasticity (tensile modulus of elasticity) (MPa) of direction of principal axis.Thus calculate
The polarizer of the polarizer of the present embodiment transmits the elastic modulus E of direction of principal axisPFor 4773MPa.
(E) the boron containing ratio of polarizer
Polarization agreement that contracts a film or TV play to an actor or actress 0.2g is added in pure water 170ml, after being allowed to be completely dissolved at 95 DEG C, Osmitrol is added
(12.5 weight %) 30g and test sample solution is made.Sodium hydrate aqueous solution (1mol/l) is added dropwise, until the measure sample
Product solution reaches the point of neutralization, calculates the boron containing ratio (weight %) in polyvinyl alcohol film by following formula according to its dripping quantity.Thus calculate
The boron containing ratio of the polarizer of the present embodiment gone out is 3.8 weight %.
The weight (g) of boron containing ratio=1.08 × sodium hydrate aqueous solution dripping quantity (ml)/polarizing coating
(F) polarizer of functional layer transmits the modulus of elasticity (tensile modulus of elasticity) of direction of principal axis
In the first functional layer and the second functional layer that are used during from the polarization plates for manufacturing above-mentioned (B), cut out in the inclined of gained
Long 100mm on the parallel direction of direction of principal axis is transmitted with polarizer in vibration plate and is absorbed with polarizer on the parallel direction of direction of principal axis
Wide 20mm rectangular test film.Then, cupping machine (Shimadzu Scisakusho Ltd Autograph AG- are utilized
1S testing machines) upper lower clamp, by make fixture at intervals of 5cm in the way of clamp the length direction of above-mentioned test film (with polarization
The parallel direction of piece transmission direction of principal axis) both ends, it is long to test film edge with the draw speed of 5mm/ minutes in the environment of 23 DEG C
Degree direction (direction parallel with polarizer transmission direction of principal axis) is stretched, according to the initial stage in the load-deformation curve of gained
Straight line slope, calculate 23 DEG C functional layer polarizer transmit direction of principal axis modulus of elasticity (tensile modulus of elasticity) (MPa).
The polarizer of first functional layer of the present embodiment thus calculated transmits the elastic modulus E of direction of principal axisF1And second functional layer it is inclined
The piece that shakes transmits the elastic modulus E of direction of principal axisF2For 4169MPa.
(G) polarizer of adhesive phase transmits the modulus of elasticity (tensile modulus of elasticity) of direction of principal axis
In the adhesive sheet used during from the polarization plates with adhesive phase for manufacturing above-mentioned (C), only adhesive phase is made
Cut out for rectangular test film, on test film direction parallel with polarizer transmission direction of principal axis in the polarization plates of gained
Long 50mm and the width 5mm on the direction parallel with polarizer absorption direction of principal axis.Then, (the strain formula meeting of accurate universal testing machine is utilized
Shimadzu Seisakusho Ltd. of society Autograph AGS-50NX testing machines) upper lower clamp, by make fixture at intervals of 3cm in the way of
Length direction (direction parallel with polarizer transmission direction of principal axis) both ends of above-mentioned test film are clamped, in the environment of 23 DEG C,
With the draw speed of 300mm/ minutes, to test film, (direction parallel with polarizer transmission direction of principal axis) was drawn along its length
Stretch, the slope of the straight line at the initial stage in the load-deformation curve of gained, the polarizer for calculating 23 DEG C of adhesive phase is saturating
Penetrate the modulus of elasticity (tensile modulus of elasticity) (kPa) of direction of principal axis.The polarizer of the adhesive phase of the present embodiment thus calculated is saturating
Penetrate the elastic modulus E of direction of principal axisPSAFor 135kPa.
(H) elastic modulus difference
As elastic modulus difference Δ E, the polarizer of the polarizer obtained from above-mentioned (D) transmits the modulus of elasticity of direction of principal axis
EPIn subtract EFAnd calculate, the EFThe polarizer of the first functional layer obtained in above-mentioned (F) transmits the modulus of elasticity of direction of principal axis
EF1The elastic modulus E of direction of principal axis is transmitted with the polarizer of the second functional layerF2It is the value when identical, then to be any one when different
The value of an individual big side.The elastic modulus difference Δ E of the present embodiment thus calculated is 604MPa.
(I) resistance to anti-thread breakage evaluation
In the polarization plates with adhesive phase obtained from above-mentioned (C), cut out long on polarizer transmission direction of principal axis
80mm and polarizer absorb direction of principal axis on width 60mm rectangular test film.Test film is fitted in into glass plate, input 80
DEG C baking oven in 1 hour.After the test film for fitting in glass plate is taken out from baking oven, in 23 DEG C and the ring of relative humidity 55%
Take care of 15 minutes, then, impregnated 30 minutes in 23 DEG C of water under border.The test film for fitting in glass plate is taken out from water
Afterwards, the moisture for removing test film is sprayed using air.Thereafter, using the length of the visual viewing test piece of magnifying glass (10 times of multiplying power)
Direction (polarizer transmission direction of principal axis) end, counts the bar number of crackle.Crackle is not seen in the present embodiment.
The ＞ of ＜ embodiments 2~4
In addition to the first functional layer and the second functional layer when manufacturing polarization plates are changed as shown in table 1, with implementation
Example 1 produces polarization plates and the polarization plates with adhesive phase in the same manner.Details as Follows for the abbreviation of the functional layer in table 1 herein
It is shown.
〔a〕TAC1：80 μm of TAC film " KC8UX2MW " thickness of Konica Minolta Opto Co. Ltd. systems
〔b〕TAC2：40 μm of TAC film " KC4UYW " thickness of Konica Minolta Opto Co. Ltd. systems
〔c〕TAC3：25 μm of TAC film " KC2UAW " thickness of Konica Minolta Opto Co. Ltd. systems
〔d〕COP1：Trade name " the ARTON FILM as cyclic polyolefin resin film of JSR Corp.
15 μm of FEKB015D3 " thickness
〔e〕COP2：Trade name " the ZEONOR as cyclic polyolefin resin film of Japanese ZEON Co. Ltd. systems
23 μm of FILM ZF14-023 " thickness
〔f〕COP3：Trade name " the ZEONOR as cyclic polyolefin resin film of Japanese ZEON Co. Ltd. systems
Phase difference 90nm, thickness phase difference 79nm in 21 μm of FILM ZT12-090079 " thickness, face
＜ embodiments 5, the ＞ of comparative example 1~3
Except when manufacturing polarizer, KI/boric acid/water is immersed in as 12/1.5/100 using the holdup time of 70 seconds
In 56 DEG C of the crosslinking bath of (weight ratio), next, being immersed in KI/boric acid/water as 9/1.5/ using the holdup time of 13 seconds
100 (weight ratios) 40 DEG C of crosslinking bath in (cross-linking process step), and by manufacture polarization plates when the first functional layer and the second function
Beyond layer is changed as shown in table 1, polarization plates and the polarization plates with adhesive phase are produced same as Example 1ly.
The ＞ of ＜ embodiments 6
Except when manufacturing polarizer, KI/boric acid/water is immersed in as 12/5.0/100 using the holdup time of 70 seconds
In 56 DEG C of the crosslinking bath of (weight ratio), next, being immersed in KI/boric acid/water as 9/5.0/100 using 13 second holdup time
In 40 DEG C of the crosslinking bath of (weight ratio) (cross-linking process step), and by the first functional layer and the second functional layer during manufacture polarization plates such as
Beyond being changed shown in table 1, polarization plates and the polarization plates with adhesive phase are produced same as Example 1ly.
The ＞ of ＜ embodiments 7
Except the polyvinyl alcohol film (average degree of polymerization using long size：About 2400, saponification degree：99.9 moles of more than %, thickness
Degree：30 μm), and the first functional layer when will manufacture polarization plates and beyond the second functional layer changes as shown in table 1, with embodiment
1 produces polarization plates and the polarization plates with adhesive phase in the same manner.
The ＞ of ＜ embodiments 8
In addition to total stretching ratio on the basis of raw material film when manufacturing polarizer is set into 5.4 times, with implementation
Example 7 produces polarization plates and the polarization plates with adhesive phase in the same manner.
The ＞ of ＜ embodiments 9
Except when manufacturing polarizer, KI/boric acid/water is immersed in as 12/1.5/100 using the holdup time of 70 seconds
In 56 DEG C of the crosslinking bath of (weight ratio), next, being immersed in KI/boric acid/water as 9/1.5/ using the holdup time of 13 seconds
100 (weight ratios) 40 DEG C of crosslinking bath in (cross-linking process step), and by manufacture polarization plates when the first functional layer and the second function
Beyond layer is changed as shown in table 1, polarization plates and the polarization plates with adhesive phase are produced same as Example 7ly.
The ＞ of ＜ comparative examples 4
In addition to the first functional layer and the second functional layer when manufacturing polarization plates are changed as shown in table 1, with implementation
Example 9 produces polarization plates and the polarization plates with adhesive phase in the same manner.
It will be shown in each embodiment and the condition and result set of comparative example in table 1.
[table 1]
With reference to table 1, in elastic modulus difference Δ E in more than -1100MPa embodiment 1~9, crackle bar number be 20 with
Under, and crackle bar number is more than 80 in the comparative example 1~4 that elastic modulus difference Δ E is below -1200MPa, is confirmed obvious
Ground is reduced.
<Embodiment 10~13>
Using the commercially available acrylic adhesive piece different from what is used in embodiment 1 polarization plates the 2nd functional layer
The upper adhesive phase for forming 25 μm of thickness, makes the polarization plates with adhesive phase in the same manner as embodiment 1 or 6 in addition.
The polarizer of each adhesive phase transmits the elastic modulus E of direction of principal axisPSAAs shown in table 2.
The condition and result of each embodiment are as shown in table 2.
[table 2]
Industrial applicability
The polarization plates of the present invention can be used for various optical applications, for example, can be used as the polarised light of image display device
Feed element and it is widely used as the detecting element of polarised light.
The explanation of symbol
1 polarizer, 3,5 functional layers, 7 adhesive phases, 10,11,12 polarization plates, 15 others components (such as liquid crystal cells,
Organic electroluminescent device etc.), 20 image display devices.
Claims (7)
1. a kind of polarization plates, are the polarization plates of the functional layer comprising polarizer and at least one side for being laminated in polarizer, from polarization
Obtained by the modulus of elasticity for the polarizer transmission direction of principal axis that functional layer is subtracted in the modulus of elasticity of the polarizer transmission direction of principal axis of piece
It is worth to be more than -1100MPa.
2. polarization plates according to claim 1, wherein, functional layer includes diaphragm.
3. polarization plates according to claim 1 or 2, wherein, functional layer includes phase retardation film.
4. according to polarization plates according to any one of claims 1 to 3, wherein, functional layer is laminated with the one side of polarizer,
The another side of polarizer is laminated with adhesive phase.
5. according to polarization plates according to any one of claims 1 to 4, wherein, it is laminated with the surface of a surface side of polarization plates
Adhesive phase or the adhesive phase with peel ply.
6. the polarization plates according to claim 4 or 5, wherein, the polarizer of adhesive phase transmits the modulus of elasticity of direction of principal axis
For below 1000kPa.
7. a kind of image display device, it is comprising any in liquid crystal cells or organic electroluminescent device and claim 1~6
Polarization plates described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209407.3A CN108254824B (en) | 2016-01-19 | 2017-01-16 | Polarizing plate and image display device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016007769 | 2016-01-19 | ||
| JP2016-007769 | 2016-01-19 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| KR (2) | KR101803675B1 (en) |
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| CN111183378A (en) * | 2017-10-03 | 2020-05-19 | 日东电工株式会社 | Polarizing plate, image display device, and method for manufacturing polarizing plate |
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| JP2019207391A (en) * | 2018-05-25 | 2019-12-05 | 住友化学株式会社 | Manufacturing method for optical laminate |
| JPWO2020138358A1 (en) * | 2018-12-27 | 2021-10-14 | 日東電工株式会社 | Polarizing plate and polarizing plate roll |
| JP6792736B1 (en) * | 2019-11-20 | 2020-11-25 | 住友化学株式会社 | Optical laminate and display device |
| JP7005803B1 (en) | 2020-10-26 | 2022-01-24 | 住友化学株式会社 | Laminate |
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Also Published As
| Publication number | Publication date |
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| TW201809761A (en) | 2018-03-16 |
| KR20170087030A (en) | 2017-07-27 |
| TWI604234B (en) | 2017-11-01 |
| CN108254824B (en) | 2023-03-28 |
| KR20170132112A (en) | 2017-12-01 |
| KR101803675B1 (en) | 2017-11-30 |
| JP2017129859A (en) | 2017-07-27 |
| TW201732334A (en) | 2017-09-16 |
| CN106980148B (en) | 2018-04-17 |
| CN108254824A (en) | 2018-07-06 |
| JP2017204003A (en) | 2017-11-16 |
| TWI746648B (en) | 2021-11-21 |
| JP6185203B2 (en) | 2017-08-23 |
| KR102413813B1 (en) | 2022-06-29 |
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