CN107924016A - One side protection polarizing coating, polarizing coating and image display device with adhesive phase - Google Patents

One side protection polarizing coating, polarizing coating and image display device with adhesive phase Download PDF

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Publication number
CN107924016A
CN107924016A CN201680049359.5A CN201680049359A CN107924016A CN 107924016 A CN107924016 A CN 107924016A CN 201680049359 A CN201680049359 A CN 201680049359A CN 107924016 A CN107924016 A CN 107924016A
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China
Prior art keywords
polarizing coating
polarizer
mentioned
transparent resin
resin layer
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CN201680049359.5A
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CN107924016B (en
Inventor
徐菁璠
上野友德
三田聪司
茂手木佑辅
岸敦史
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Nitto Denko Corp
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Nitto Denko Corp
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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
    • 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
    • G02B5/305—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 including organic materials, e.g. polymeric layers
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • 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
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering

Abstract

The present invention's only protects polarizing coating at least single side of above-mentioned polarizer with transparent resin layer in one side of the single side with protective film of polarizer; said protection film across or do not set across the transparent resin layer at least single side for being arranged at above-mentioned polarizer, and above-mentioned transparent resin layer contains at least one of inorganic salts of inorganic salts and alkaline-earth metal selected from alkali metal.One side protection polarizing coating has resistance to anti-thread breakage, and the reduction of optical characteristics during can warming and humidifying be tested and the blueing of tone are suppressed to reduced levels.

Description

One side protection polarizing coating, polarizing coating and image display device with adhesive phase
Technical field
The present invention relates to the single side only in polarizer, and there is the unilateral of protective film to protect polarizing coating.Moreover, it relates to The polarizing coating with adhesive phase of above-mentioned unilateral protection polarizing coating is used.Protect polarizing coating or with adhesive phase in above-mentioned one side Polarizing coating can form liquid crystal display device (LCD), organic EL individually or in the form of the optical film that lamination has above-mentioned polarizing coating The image display devices such as display device.
Background technology
For liquid crystal display device, from the point of view of its image forming mode, the glass base of liquid crystal panel surface is being formed The both sides configuration polarizing coating of plate is essential.For polarizing coating, usually used is by polyvinyl alcohol film and iodine The one or two sides of the polarizer formed etc. dichroic material is formed inclined using the fitting protective film such as polyvinyl alcohol bonding agent Vibrating diaphragm.
In addition, severe rugged environment of the polarizing coating in thermal shock (for example, experiment when progress 250 is small at a high temperature of 95 DEG C) Under, exist and easily absorb the problem of direction of principal axis cracks in the whole of polarizer because of the change of the shrinkage stress of polarizer. That is, polarizing coating under above-mentioned severe rugged environment to the resistance to anti-thread breakage insufficient of thermal shock.Particularly, for going out from the viewpoint of slimming Send out only for the single side of polarizer is provided with the unilateral protection polarizing coating of protective film, there is the side because being provided with protective film Polarizer shrinkage stress and and protective film opposite side polarizer shrinkage stress difference, produced inside polarizer Surplus stress, easily produces the fine crack from hundreds of μm up to as through entire surface in the direction of principal axis that absorbs of polarizer The problem of various crackles of through-wall crack.
In order to suppress the generation of the crackle, such as, it has been proposed that tensile elasticity mould is set on one side protection polarizing coating Measure the protective layer of more than 100MPa and the polarizing coating with adhesive phase for further setting adhesive phase to form on the protective layer (patent document 1).In addition, it has been proposed that the single side of the polarizer below 25 μm of thickness has by curable resin composition Solidfied material formed protective layer, polarizer another side with protective film and in the outside of the protective layer with adhesive The polarizing coating (patent document 2) with adhesive phase of layer.From the viewpoint of the generation for suppressing crackle, above patent document 1,2 Described in the polarizing coating with adhesive phase be effective.It is in addition, thin layer, light from being realized while the generation of crackle is suppressed From the viewpoint of matter, it has been proposed that set at least single side of polarizer by water miscible envelope formative composition (poly- second Enol based resin composition) formed protective layer scheme (patent document 3).
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2010-009027 publications
Patent document 2：Japanese Unexamined Patent Publication 2013-160775 publications
Patent document 3：Japanese Unexamined Patent Publication 2005-043858 publications
The content of the invention
Problem to be solved by the invention
According to above patent document 1 to 3, preceding polarizer can be suppressed to a certain extent to absorption by the protective layer The contraction of direction of principal axis, so as to suppress the generation of the crackle.When forming the protective layer, for example, to polarizer From the point of view of adaptation, coating stability, productivity etc., the formation material of polyvinyl alcohol resin is preferably comprised.Particularly exist Recorded in patent document 3：It is preferred that coordinate in polyvinyl alcohol resin water-soluble epoxy resin, dialdehyde as glyoxal, Isocyanates and iron ion, cobalt ions, nickel ion, copper ion, zinc ion, aluminium ion, metal ion as zirconium ion etc., Curability composition or crosslinking agent.
But the rate of descent that the protective layer containing polyvinyl alcohol resin has the optical characteristics in warming and humidifying experiment is big The problem of.In addition, above-mentioned have a case that the unilateral protection polarizing coating of protective layer compared with without protective layer, in warming and humidifying There are the problem of blueing (tone is in blueness) in experiment.Since the blueing of polarizing coating is easily arrived by eye-observation, expect inclined The tone of vibrating diaphragm is stablized.
In addition, when suppressing above-mentioned crackle by above-mentioned protective layer, the thickness of protective layer is the bigger the better, but the thickness of protective layer Bigger, the optical characteristics rate of descent in warming and humidifying experiment is bigger, and the tendency of blueing becomes larger.In addition, for polarizer also into Slimming is gone.In the case where being thinned the polarizer used in polarizing coating, the change of the shrinkage stress of polarizer diminishes.But It is that, since polarizer is thinned in itself, can also rupture polarizer even if with power weak than ever, therefore, use is thin It is resistance to anti-thread breakage also insufficient during the polarizer of type.
It is an object of the present invention to provide it is a kind of only polarizer single side have protective film and in polarizer at least Single side has the unilateral protection polarizing coating of transparent resin layer, it will can be tested in warming and humidifying with resistance to anti-thread breakage The reduction of optical characteristics and blueing are suppressed to smaller level.
In addition, it is an object of the present invention to provide the polarizing coating with adhesive phase for having used above-mentioned polarizing coating.In addition, The present invention relates to the image display device of the polarizing coating with above-mentioned polarizing coating or with adhesive phase.
Solution to the problem
Present inventor etc. by further investigation it turns out that, using it is following it is unilateral protect polarizing coatings etc., can solve The above subject, so as to complete the present invention.
That is, the present invention relates to a kind of unilateral protection polarizing coating, it is only in one side of the single side with protective film of polarizer Polarizing coating is protected, wherein,
There is transparent resin layer at least single side of above-mentioned polarizer,
Across or the transparent resin layer of at least single side of the polarizer is not provided with the protective film, also,
Above-mentioned transparent resin layer contains at least one of inorganic salts of inorganic salts and alkaline-earth metal selected from alkali metal.
In above-mentioned unilateral protection polarizing coating, preferably above-mentioned inorganic salts are iodide.Furthermore it is preferred that above-mentioned iodide are iodine Change potassium.
In above-mentioned unilateral protection polarizing coating, the content (a of the iodine component contained in preferably above-mentioned polarizer：Ionic strength) Content (b with the inorganic salts ingredients contained in above-mentioned transparent resin layer：Ionic strength) the ratio between (b/a) be more than 0.08.
In above-mentioned unilateral protection polarizing coating, preferably above-mentioned transparent resin layer containing water-soluble resin by forming material shape Into.As above-mentioned water-soluble resin, preferably polyvinyl alcohol resin.
In above-mentioned unilateral protection polarizing coating, the thickness of preferably above-mentioned transparent resin layer is more than 0.2 μm.Additionally, it is preferred that The thickness of above-mentioned transparent resin layer is less than 6 μm.
In above-mentioned unilateral protection polarizing coating, preferably above-mentioned polarizer uses the polarizer that thickness is less than 15 μm.
In above-mentioned unilateral protection polarizing coating, the light represented by monomer transmissivity T and degree of polarization P of preferably above-mentioned polarizer Characteristic is learned in the range of following formula expression：
P ＞-(100.929T-42.4- 1) × 100 (wherein, T ＜ 42.3) and
P >=99.9 (wherein, T >=42.3).
Moreover, it relates to a kind of polarizing coating with adhesive phase, it is with above-mentioned unilateral protection polarizing coating and bonding Oxidant layer.
Moreover, it relates to a kind of image display device, it is with above-mentioned unilateral protection polarizing coating or the bonding of above-mentioned band The polarizing coating of oxidant layer.
The effect of invention
The unilateral protection polarizing coating of the present invention is provided with transparent resin layer on polarizer, so as to utilize the transparent tree Lipid layer suppresses the generation of crackle.
On the other hand, in the unilateral protection polarizing coating of transparent resin layer is provided with, above-mentioned transparent resin layer is directly set In on polarizer.Thus, it can be known that in warming and humidifying experiment, iodine component (iodine, iodide and their network in polarizer Compound), potassium composition (being derived from iodide) be transferred to transparent resin layer.And understand, due to being transferred to the iodine of the transparent resin layer Component, potassium composition and reduction, blueing there occurs the optical characteristics of unilateral protection polarizing coating.
In the unilateral protection polarizing coating of the present invention, inorganic salts and/or alkaline earth containing alkali metal in transparent resin layer The inorganic salts of metal.Above-mentioned inorganic salts are the iodide or its similar compound contained in polarizer.Think above-mentioned polarizer In iodine component, the inorganic salts in potassium composition and above-mentioned transparent resin layer can keep a degree of equilibrium relation.Therefore can Think, the transfer of iodine component, potassium composition to transparent resin layer in above-mentioned polarizer is suppressed.Similarly, it is believed that also not Transfer of the inorganic salts in above-mentioned transparent resin layer into polarizer can occur.As a result, think that the unilateral protection of the present invention is inclined Even if vibrating diaphragm is provided with transparent resin layer, the reduction of the optical characteristics during also warming and humidifying can be tested and blueing be suppressed to compared with Low-level.
In addition, the unilateral protection polarizing coating of the present invention is adapted in use to slim polarizer (for example, thickness is less than 15 μm of feelings Condition) situation.For slim polarizer, although the change of the shrinkage stress of polarizer diminishes, due to polarizer sheet Body is thinned, resistance to anti-thread breakage insufficient.Polarizing coating according to the present invention, even in the situation using slim polarizer Under, due to transparent resin layer, can also improve resistance to anti-thread breakage.
Brief description of the drawings
Fig. 1 is an example of the constructed profile of the polarizing coating of the present invention.
Fig. 2 is an example of the constructed profile of the polarizing coating of the present invention.
Fig. 3 is an example of the constructed profile of the polarizing coating of the present invention.
Symbol description
1 polarizer
2 transparent resin layers
3 protective films
10 unilateral protection polarizing coatings
Embodiment
Hereinafter, the unilateral protection polarizing coating 10 of the present invention is illustrated referring to figs. 1 to Fig. 3.One side protection polarizing coating 10 Only there is protective film 3 in the single side of polarizer 1, and there is transparent resin layer 2 at least single side of polarizer 1.Transparent resin layer 2 (direct) is arranged at polarizer 1.In Fig. 1, only there is transparent resin layer 2 in the one side of polarizer 1, is being not provided with the transparent tree Protective film 3 is provided with the polarizer 1 of the side of lipid layer 2.In fig. 2, there is transparent resin layer 2 in the both sides of polarizer 1, The side of the transparent resin layer 2 is provided with protective film 3.In figure 3, only there is transparent resin layer 2 in the one side of polarizer 1, The side of the transparent resin layer 2 is provided with protective film 3.
Although not shown, said protection film 3 can also lamination 2 it is used above.In addition, although not shown, polarizer 1 or transparent Resin bed 2 and protective film 3 press from both sides interlayer and lamination across adhesive layer, adhesive phase, lower coating (priming coat) etc..Though in addition, not Diagram, can be after protective film 3 sets adhesive layer or implements activation process, the lamination adhesive layer and adhesive layer.
In addition, although not shown, adhesive phase can be set on the unilateral protection polarizing coating 10 of the present invention.Further, Membrane can also be set over the binder layer.Alternatively, it is also possible to set surface to protect on the unilateral protection polarizing coating 10 of the present invention Cuticula.
＜ polarizers ＞
Polarizer is not particularly limited, various polarizers can be used.As polarizer, can enumerate for example：Make iodine, two colors Property dichroic substance as dyestuff is adsorbed in polyvinyl alcohol film, part formalizing polyvinyl alcohol film, ethylene-acetate second The dehydration of the hydrophilic macromolecule films such as the partly-hydrolysed film of enoate copolymer class and film, polyvinyl alcohol obtained from carrying out simple tension The polyenoid based oriented film such as desalination acid treatment thing etc. of processed material, polyvinyl chloride.Among these, preferably by polyvinyl alcohol film and iodine The polarizer formed etc. dichroic substance.It is not particularly limited for the thickness of these polarizers, is usually 2~25 μm.
Polyvinyl alcohol film is dyed and carried out with iodine polarizer that simple tension forms for example can be by by polyvinyl alcohol It is impregnated in the aqueous solution of iodine being dyed and be stretched to former long 3~7 times and is made.As needed, boron can also be included Acid, zinc sulfate, zinc chloride etc., can also be impregnated in the aqueous solution of potassium iodide etc..It is further possible to as needed and Polyvinyl alcohol film immersion is washed in water before dyeing.By being washed to polyvinyl alcohol film, except that can wash Go beyond the dirt of polyvinyl alcohol film surface, antiblocking agent, also having makes polyvinyl alcohol membrane swelling so as to prevent dyeing not Impartial uneven effect.Stretching can be carried out after being dyed using iodine, can also an Edge Coloring on one side stretch, in addition may be used also To be dyed after being stretched using iodine.It can also be stretched in aqueous solution, water-bath in boric acid, potassium iodide etc..
As above-mentioned polarizer, the slim polarizer that thickness is less than 15 μm can be used.From slimming and to by heat From the viewpoint of the patience of crackle caused by impact, the thickness of polarizer is preferably 12 μm, more preferably less than 10 μm, further Preferably less than 8 μm, be still more preferably less than 7 μm, much further preferably from less than 6 μm.On the other hand, the thickness of polarizer Degree is preferably more than 2 μm, more preferably more than 3 μm.Such slim polarizer is since uneven thickness is few, visuognosis Property is excellent, and change in size is few, therefore to the excellent in te pins of durability of thermal shock.
As the slim polarizer that thickness is less than 15 μm, it can typically enumerate Japanese Patent No. 4751486 and say Bright book, No. 4751481 specifications of Japanese Patent No., No. 4815544 specifications of Japanese Patent No., Japanese Patent No. 5048120 Specification, No. 5587517 specifications of Japanese Patent No., International Publication No. No. 2014/077599 pamphlet, International Publication No. Slim polarizing coating (polarizer) described in No. 2014/077636 pamphlet etc. is obtained as the manufacture method described in these documents The slim polarizing coating (polarizer) arrived.
It is preferred that above-mentioned polarizer meets the condition of following formula with the optical characteristics represented by monomer transmissivity T and degree of polarization P Mode is formed：
P ＞-(100.929T-42.4- 1) × 100 (wherein, T ＜ 42.3) and
P >=99.9 (wherein, T >=42.3).
Mainly, the polarizing coating formed in a manner of meeting above-mentioned condition, which has, is used as the liquid for having used large-scale display element Performance required by brilliant TV display.Specifically, contrast 1000:More than 1 and high-high brightness 500cd/m2More than. As other purposes, such as the visible side of organic EL display can be fitted in.
As above-mentioned slim polarizing coating, in the process including being stretched with the state of laminated body and the process dyed Preparation method in, from can be stretched to high magnification and make polarizing properties improve from the viewpoint of, preferably by such as Japanese Patent No. No. 4751481 No. 4751486 specifications, Japanese Patent No. specifications, as described in No. 4815544 specifications of Japan Patent Slim polarizing coating obtained from being included in the preparation method of the process stretched in boric acid aqueous solution, particularly preferably by day Being included in boric acid aqueous solution described in No. 4815544 No. 4751481 specification of this patent, Japan Patent specifications carries out Stretching secondarily carries out slim polarizing coating obtained from the preparation method of the process stretched in atmosphere before.These slim polarizations Film can by by polyvinyl alcohol resin (hereinafter also referred to PVA resinoids) layer and stretching resin base material with the state of laminated body The preparation method of the process stretched and the process dyed and obtain.If the preparation method, though then PVA resinoids layer compared with It is thin, a problem that being supported by being stretched with resin base material, fracture can not also occur as caused by stretching and drawn Stretch.
＜ resin base materials ＞
In addition, above-mentioned resin base material (stretching resin base material) can use the tree for being suitable for manufacturing above-mentioned slim polarizing coating Aliphatic radical material.As the formation material of resin base material, various thermoplastic resins can be used.As thermoplastic resin, can enumerate for example： The alkene such as the cyclenes such as the esters resins such as polyethylene terephthalate resinoid, norbornene resin hydrocarbon resins, polypropylene Hydrocarbon resins, polyamide LEO resins (レ オ Trees fat), polycarbonate resin, their copolymer resins etc..Among these, from The easy degree of manufacture and from the viewpoint of reducing cost, preferably esters resin.Esters thermoplastic resin base material can use non- Crystalline substance esters thermoplastic resin base material or crystallinity esters thermoplastic resin base material.
Above-mentioned stretching process is preferably so that total stretching ratio of such as PVA resinoids layer is calculated as 3~10 with total stretching ratio The mode of scope again carries out.Total stretching ratio is preferably 4~8 times, more preferably 5~7 times.It is preferred that so that total stretching times Rate carries out for more than 5 times.Above-mentioned stretching process can also be implemented in dyeing process, other process.In addition to stretching process Process in stretching in the case of, the accumulation that above-mentioned total stretching ratio refers to include in being stretching in these processes stretches Multiplying power.
Above-mentioned dyeing process can be by making dichroic dye or iodine in the absorption of PVA resinoids layer, being orientated and progress.Dyeing Process can also carry out together with stretching process.Dyeing process in above-mentioned iodine solution usually for example, by impregnating the arbitrary time And carry out.Iodine aqueous solution as iodine solution can use by iodine and as dissolution aids iodide and containing iodide ion Aqueous solution etc..As iodide, preferably for example potassium iodide, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, Barium iodide, calcium iodide, stannic iodide, titanium iodide etc..As iodide, preferably potassium iodide.Using in the present invention in other process It is also same as described above in the case of the iodide used.
Iodine concentration in above-mentioned iodine solution is 0.01~10 weight % or so, is preferably 0.02~5 weight %, is further excellent Elect 0.02~0.5 weight % as.Iodide concentration is preferably with 0.1~10 weight % or so, further preferably with 0.2~8 weight % is measured to use.During iodine staining, the temperature of iodine solution is usually 20~50 DEG C or so, is preferably 25~40 DEG C.Dip time is usual It is preferably the scope of 20~240 seconds for 10~300 seconds or so.
In addition, in addition to above-mentioned operation, for example insoluble process, cross-linking process step, the drying (tune of moisture rate can also be implemented Section) process etc..
In insoluble process, cross-linking process step, carried out using boron compound as crosslinking agent.To the order of these processes It is not particularly limited.Cross-linking process step can also carry out together with dyeing process, stretching process.Insoluble process, cross-linking process step can It is multiple to carry out.As boron compound, boric acid, borax etc. can be enumerated.Boron compound is usually mixed with aqueous solution or water-organic solvent The form for closing solution uses.Usually using boric acid aqueous solution.The boric acid concentration of boric acid aqueous solution is 1~10 weight % or so, excellent Elect 2~7 weight % as.When assigning heat resistance by the degree of cross linking, above-mentioned boric acid concentration is preferably set to.Can be in boric acid aqueous solution etc. In contain the iodide such as potassium iodide.When containing iodide in boric acid aqueous solution, iodide concentration is preferably with 0.1~10 weight % Left and right, further preferably used with 0.5~8 weight %.
As described above, polarizer is obtained by implementing dyeing process etc. to PVA resinoids etc..As a result, polarizer contains It is useful for the iodide such as the potassium iodide of adjustment of color, the iodine for controlling polarized light property.In polarizer above-mentioned iodine component (iodine, Iodide and their complex compound), the content of potassium composition (being derived from iodide) be usually 1~10 weight %, be preferably 5~8 Weight %.
＜ protective films ＞
As form said protection film material, be preferably the transparency, mechanical strength, heat endurance, moisture barrier, respectively The material excellent to the same sex etc..It can enumerate for example：The polyesters such as polyethylene terephthalate, polyethylene naphthalate The acrylic polymers such as the cellulosic polymers such as polymer, cellulose diacetate, cellulose triacetate, polymethyl methacrylate Styrenic polymer, the polycarbonate polymers such as compound, polystyrene, acrylonitritrile-styrene resin (AS resins) etc.. In addition, the example as the polymer for forming said protection film, can also enumerate：Polyethylene, polypropylene, ring system have norborneol Polyolefin polymers, vinyl chloride polymer, nylon, aromatic series as the polyolefin of alkene structure, ethylene-propylene copolymer The acylamide polymers such as polyamide, acid imide polymer, sulfone are birdsed of the same feather flock together compound, polyether sulfone polymer, polyether-ether-ketone Type of Collective Birds of the same feather flock together compound, vinyl butyral of thing, polyphenylene sulfide ether polymer, vinyl alcohol polymer, vinylidene chloride is birdsed of the same feather flock together compound, aromatic ester Birds of the same feather flock together compound, polyformaldehyde is birdsed of the same feather flock together the blend etc. of compound, epoxide polymer or above-mentioned polymer.These protective films are usually logical Cross adhesive layer and fit in polarizer.In addition, said protection film can be formed by the following method：Use (methyl) acrylic acid Thermosetting resin or the ultraviolet hardenings such as class, carbamates, propenoic methyl carbamate class, epoxies, organic silicon They are coated on polarizer, are solidified to form it by resin.
It should be noted that the appropriate additive of a kind of any of the above can also be included in protective film., can as additive Enumerate for example：It is ultra-violet absorber, antioxidant, lubricant, plasticizer, releasing agent, anti-coloring agent, fire retardant, nucleator, anti-quiet Electric agent, pigment, colouring agent etc..The content of above-mentioned thermoplastic resin in protective film is preferably 50~100 weight %, more preferably 50~99 weight %, more preferably 60~98 weight %, particularly preferably 70~97 weight %.Above-mentioned heat in protective film In the case that the content of plastic resin is below 50 weight %, exist can not fully show thermoplastic resin intrinsic height thoroughly The hidden danger of bright property etc..
As said protection film, phase difference film can be used.As phase difference film, it can enumerate and be with front phase difference More than 40nm and/or thickness direction phase difference are the phase difference film of the phase difference of more than 80nm.Front phase difference is usually controlled in The scope of 40~200nm, thickness direction phase difference are usually controlled in the scope of 80~300nm.Protection is used as using phase difference film In the case of film, which also serves as polarizer protective film and plays function, therefore it is possible to realize slimming.
As phase difference film, it can enumerate what thermoplastic resin film progress simple tension processing or biaxial tension processing were formed Birefringence film.The temperature of above-mentioned stretching, stretching ratio etc. can according to phase difference value, the material of film, thickness and suitably set.
The thickness of said protection film can be determined suitably, but usually be gone out from the workability such as intensity, operability, thin layer etc. Hair, is preferably 3~200 μm, more preferably 3~100 μm.Particularly from transport property aspect, said protection film is (pre- In the case of being initially formed film) thickness be preferably 10~60 μm, more preferably 10~45 μm.On the other hand, from transport property Aspect is set out, and the thickness of said protection film (in the case of applying, being formed by curing) is preferably 3~25 μm, further preferably For 3~20 μm.Said protection film can also multi-disc or multilayer use.
In the one side not Nian Jie with polarizer of said protection film, can set hard conating, anti-reflection layer, anti adhering layer, The functional layers such as diffusion layer, antiglare layer.It should be noted that above-mentioned hard conating, anti-reflection layer, anti adhering layer, diffusion layer, antiglare layer Etc. functional layer in addition to it could be provided as protective film in itself, it can also additionally be arranged to the layer different from protective film.
＜ folder interlayers ＞
Said protection film and polarizer can press from both sides interlayer lamination across adhesive layer, adhesive phase, lower coating (priming coat) etc.. At this time, preferably by folder interlayer by both laminations in a manner of no the air gap.
Adhesive layer can be formed using bonding agent.It is not particularly limited for the species of bonding agent, various bondings can be used Agent.As long as the optically transparent layer of the adhesive layer, then be not particularly limited, as bonding agent, can be used water-based, molten The bonding agent of the various forms such as formulation, hot melt, active energy ray curable, but preferably aqueous adhesive or active-energy Ray curing bonding agent.
As aqueous adhesive, can enumerate isocyanates bonding agent, polyvinyl alcohol bonding agent, gelatin class bonding agent, Vinyl-based latex class, waterborne polyester etc..Aqueous adhesive is usually used in the form of the bonding agent formed by aqueous solution, is led to Solid constituent often containing 0.5~60 weight %.
Active energy ray curable bonding agent is by electron beam, ultraviolet (radical-curable, cationic curing Type) isoreactivity energy-ray carries out cured bonding agent, and can in the form of for example electronic beam solidified, ultraviolet hardening Use.Optical free radical curing type bonding agent for example can be used in active energy ray curable bonding agent.By optical free radical curing type Active energy ray curable bonding agent used as ultraviolet hardening in the case of, which contains radical polymerization Property compound and Photoepolymerizationinitiater initiater.
The application pattern of bonding agent can suitably be selected according to viscosity, the target thickness of bonding agent.As application pattern Example, can enumerate for example：Reverse spreader, gravure coater (directly, reverse or hectograph), the reverse spreader of bar type, roller coat Machine, die coating machine, wire rod coating, dip coated device, bar coater etc..In addition, the modes such as impregnation method may be appropriately used in coating.
In addition, in the case that the coating of above-mentioned bonding agent uses aqueous adhesive etc., preferably with finally formed bonding agent The mode that the thickness of layer reaches 30~300nm carries out.The thickness of above-mentioned adhesive layer is more preferably 60~250nm.It is another Aspect, in the case of using active energy ray curable bonding agent, preferably so that the thickness of above-mentioned adhesive layer reach 0.1~ 200 μm of mode carries out.More preferably 0.5~50 μm, more preferably 0.5~10 μm.
It should be noted that when the lamination of mirror and protective film is polarized, can be between protective film and adhesive layer Adhesive layer is set.Adhesive layer using for example with polyester backbone, polyether skeleton, polycarbonate backbone, polyurethane skeleton, The various resins of organic silicon, polyamide backbone, polyimide backbone, polyvinyl alcohol skeleton etc. are formed.These fluoropolymer resins It can be used alone, or two or more is applied in combination.In addition, in the formation of adhesive layer, other add can also be added Add agent.Specifically, stabilizers such as tackifier, ultra-violet absorber, antioxidant, heat-resisting stabilizing agent etc. can further be used.
In general, adhesive layer can be pre-set to protective film, and make the easy bonding of the protective film by adhesive layer Layer side and polarizer lamination.The formation of adhesive layer can be coated on by technology known to the formation material use by adhesive layer On protective film and it is dried to carry out.Formation material for adhesive layer, usually it is contemplated that dried thickness, coating Smoothness etc. and be adjusted to be diluted to the solution of debita spissitudo.The dried thickness of adhesive layer is preferably 0.01~ 5 μm, more preferably 0.02~2 μm, more preferably 0.05~1 μm.It should be noted that adhesive layer can set it is more Layer, in such a situation it is preferred that making the gross thickness of adhesive layer fall in above range.
Adhesive phase is formed by adhesive.As adhesive, various adhesives can be used, can enumerate for example：Rubber is glued It is mixture, acrylic adhesives, silicone adhesive category, carbamates adhesive, vinyl alkyl ethers adhesive, poly- Vinyl pyrrolidone class adhesive, polyacrylamide adhesive, cellulose family adhesive etc..Can be according to above-mentioned adhesive Species and the base polymer for selecting adhesiveness.In above-mentioned adhesive, from the optical transparency it is excellent, show suitable profit The excellent aspect such as adhesion characteristic and weatherability, heat resistance is set out as moist, coherency and cementability, preferably using third Alkene acrylic binder.
Lower coating (priming coat) is formed to improve the adaptation of polarizer and protective film.As composition primary coat The material of layer, as long as the material of a degree of strong closing force has been given play to base material film and polyvinyl alcohol resin layer both of which Material is then not particularly limited.For example, excellent thermoplastic resins such as the transparency, heat endurance, draftability etc. can be used.As heat Plastic resin, can enumerate for example：Acrylic resin, polyolefin resin, polyester resin, polyvinyl alcohol resin or it Mixture.
＜ transparent resin layers ＞
Transparent resin layer is formed by the various materials that formed.Transparent resin layer can be for example, by above-mentioned formation material be coated with Formed in polarizer.Transparent resin layer is arranged at least single side of polarizer.The thickness of transparent resin layer is more than 0.2 μm, By the transparent resin layer of the thickness, the generation of crackle can be suppressed.The thickness of above-mentioned transparent resin layer be preferably 0.4 μm with On, more preferably more than 0.5 μm, more preferably more than 0.7 μm.On the other hand, if transparent resin layer becomes blocked up, Optics reliability and water resistance decline, therefore the thickness of transparent resin layer is preferably less than 6 μm, more preferably less than 5 μm, into one Step is preferably less than 3 μm.
As the formation material of transparent resin layer, can enumerate for example：It is polyester resin, polyethers resinoid, polycarbonate-based Resin, polyurethane based resin, organic silicon resin, polyamide-based resin, polyimide based resin, polyvinyl alcohol resin, third Olefin(e) acid resinoid etc..These resin materials can be used alone, and can also combine two or more use.In addition, above-mentioned resin Form can be water-based, solvent borne any form.
As the resin for forming above-mentioned transparent resin layer, preferably water-soluble resin.Water-soluble resin can be with aqueous solution Form uses, good with the compatibility of the formation material of polarizer.As the typical example of water-soluble resin component, can enumerate for example： It is polyvinyl alcohol resin, polyacrylic acid, polyacrylamide, methylolated melamine resin, methylolation Lauxite, solvable Type phenolic resin, polyethylene oxide, carboxymethyl cellulose etc..These materials can be used alone, and can also combine a variety of uses. As above-mentioned resin component, preferably using polyvinyl alcohol resin, polyacrylic acid, methylolated melamine.It is particularly preferably poly- Vinyl alcohol resin.Hereinafter, the situation for having used polyvinyl alcohol resin is illustrated.
As above-mentioned polyvinyl alcohol resin, such as polyvinyl alcohol can be enumerated.Polyvinyl alcohol passes through to polyvinyl acetate Carry out saponification and obtain.In addition, as polyvinyl alcohol resin, vinyl acetate can be enumerated and the monomer with copolymerizable is formed Copolymer it is saponified.In the case where the above-mentioned monomer with copolymerizable is ethene, ethylene-vinyl alcohol copolymer is obtained. In addition, as the above-mentioned monomer with copolymerizable, can enumerate：Maleic acid (acid anhydride), fumaric acid, crotonic acid, itaconic acid, (methyl) third The unsaturated carboxylic acids such as olefin(e) acid and its esters；The alpha-olefins such as ethene, propylene, (methyl) allyl sulphonic acid (sodium), (maleic acid mono alkyl Ester) sodium sulfonate, alkyl maleates sodium disulfonate, N hydroxymethyl acrylamide, the alkali salt of acrylamide alkyl sulfonic acid, N- ethene Base pyrrolidones, n-vinyl pyrrolidone derivative etc..These polyvinyl alcohol resins can be used alone, can also Combine two or more use.From the viewpoint of humidity resistance, water resistance is met, preferably to polyvinyl acetate progress saponification Obtained polyvinyl alcohol.
Usable saponification degree is, for example, the above-mentioned polyvinyl alcohol resin of 96 moles of more than %.From meeting humidity resistance, resistance to From the viewpoint of water-based, saponification degree is preferably 99 moles of more than %, more preferably 99.3 moles of more than %, more preferably 99.7 moles of more than %.Saponification degree represent be can by unit of the saponification to be converted into vinyl alcohol units in actually by soap The unit ratio of vinyl alcohol units is melted into, residue is vinyl ester units.Saponification degree can be based on JIS K6726-1994 and ask Go out.
Usable average degree of polymerization is, for example, more than 500 above-mentioned polyvinyl alcohol resin, but from meeting humidity resistance, resistance to From the viewpoint of water-based, average degree of polymerization is preferably more than 1000, more preferably more than 1500, more preferably 2000 with On.The average degree of polymerization of polyvinyl alcohol resin is based on JIS-K6726 and measures.
In addition, as above-mentioned polyvinyl alcohol resin, the side chain of above-mentioned polyvinyl alcohol or its copolymer can be used there is parent The modified polyvinylalcohol resinoid of water-based functional group.As above-mentioned hydrophilic functional group, such as acetoacetyl can be enumerated Base, carbonyl etc..In addition it is possible to use acetalation, urethane, etherificate, grafting, phosphorus are carried out to polyvinyl alcohol resin Modified polyvinylalcohol obtained from Esterification grade.
《Inorganic salts》
The transparent resin layer of the present invention contains at least 1 in the inorganic salts of the inorganic salts and alkaline-earth metal selected from alkali metal Kind.As alkali metal, lithium, sodium, potassium etc. can be enumerated, as alkaline-earth metal, calcium, strontium, barium etc. can be enumerated.On the other hand, as nothing The species of machine salt, can enumerate halide (fluoride, chloride, bromide, iodide etc.), sulfide, carbonate, sulfate, Borate, phosphate, titanate etc..
As the concrete example of the inorganic salts of the alkali metal of the present invention, can enumerate for example：Lithium carbonate, lithium chloride, lithium sulfide, iodine Change lithium；Sodium iodide, sodium chloride, sodium fluoride, sodium bromide, tertiary sodium phosphate；Boratex, sodium carbonate；Potassium iodide, potassium chloride etc..
In addition, the concrete example of the inorganic salts as alkaline-earth metal, can enumerate for example, calcium phosphate, calcium chloride, calcium iodide, carbon Sour calcium, calcium nitrate；Strontium iodide, strontium carbonate, strontium titanates, strontium sulfate, strontium chloride；Barium sulfate, barium carbonate, barium titanate, barium fluoride etc..
The inorganic salts of above-mentioned inorganic salts preferred as alkali, wherein, preferred sylvite.On the other hand, the species on inorganic salts, It is preferred that iodide.From the above point of view, as inorganic salts, particularly preferred potassium iodide.Iodide, particularly potassium iodide are used as and match somebody with somebody The inorganic salts in transparent resin are closed in use, its material contained by with the polarizer being used in the manufacturing process of polarizer For identical material, the iodate potassium composition that can inhibit in polarizer is shifted into transparent resin layer, from this point on from the point of view of be preferred 's.
It should be noted that above-mentioned inorganic salts in patent document 3 with being coupled in polyvinyl alcohol resin to have been formed The curability compositions such as the metal ion of the protective layer of polariscope or crosslinking agent are clearly different.Above-mentioned inorganic salts are even in being matched with In the case of having used in the transparent resin layer of polyvinyl alcohol resin, polyvinyl alcohol resin will not be crosslinked.In addition, i.e. Above-mentioned inorganic salts are replaced using the organic salt of alkali metal and/or the organic salt of alkaline-earth metal, can not be adequately suppressed Iodine component in polariscope is shifted to transparent resin layer, it is thus impossible to the reduction of the optical characteristics during warming and humidifying is tested, blueing Suppress in low-level.
Relative to 100 parts by weight of formation material (for example, polyvinyl alcohol resin) of transparent resin layer, above-mentioned inorganic salts exist Ratio in transparent resin layer is preferably generally the scope of 1~25 parts by weight.The content of above-mentioned inorganic salts is preferably 2~15 weight Part, more preferably 5~15 parts by weight.By increasing the content of above-mentioned inorganic salts, blueing can be suppressed.In addition, short wavelength Side, the transmissivity of long wavelength side diminish, and can suppress the deterioration of polarizer.However, if the content of above-mentioned inorganic salts is excessive, Obstacle is produced in the film of transparent resin layer is formed, it is not preferred in terms of resistance to anti-thread breakage reduction.On the other hand, it is if above-mentioned inorganic The content of salt tails off, then the reduction in the optical characteristics during warming and humidifying is tested, blueing suppress not preferred in terms of low-level.
Above-mentioned inorganic salts have the function that to suppress iodine in polarizer, potassium iodide shifts into transparent resin.Therefore, it is above-mentioned The content of inorganic salts preferably considers the content of the iodine component in polarizer to determine.For example, it is preferable to so as to contain in above-mentioned polarizer Content (a of some iodine components：Ionic strength) with the content (b of inorganic salts ingredients that contains in above-mentioned transparent resin layer：Ion is strong Degree) the ratio between (b/a) be controlled as more than 0.08 mode.From the viewpoint of the blueing for suppressing polarizer, above-mentioned ratio (b/a) it is preferably more than 0.08, more preferably more than 0.4.On the other hand, from it is resistance to it is anti-thread breakage from the viewpoint of, above-mentioned ratio Value (b/a) is preferably less than 2, and more preferably less than 1.2.It should be noted that used to calculate ratio (b/a) The content (b) of the inorganic salts contained in the content (a) of iodine component, transparent resin layer is by the assay method described in embodiment Obtained from ionic strength.
Transparent resin layer can be formed by the material that formed without curability composition.For example, can be by containing above-mentioned poly- second Enol resinoid (PVA resinoids) is formed as the formation material of principal component.
Contain above-mentioned polyvinyl alcohol resin as in the formation material of principal component, curability composition (crosslinking can be contained Agent) etc..The ratio of transparent resin layer or the polyvinyl alcohol resin formed in material (solid constituent) be preferably 80 weight % with On, more preferably more than 90 weight %, more preferably more than 95 weight %.However, it is preferred in above-mentioned formation material not Containing curability composition (crosslinking agent).
From the viewpoint of water resistance is improved, above-mentioned curability composition (crosslinking agent) can be used, relative to polyvinyl alcohol 100 parts by weight of resinoid, its ratio are preferably below 20 parts by weight, more preferably below 10 parts by weight, are more preferably 5 weights Measure below part.
Above-mentioned formation material, which can be prepared into, makes above-mentioned polyvinyl alcohol resin be dissolved in the solution that solvent forms.As molten Agent, can enumerate for example：Water, dimethyl sulfoxide, dimethylformamide, dimethylacetylamide, 1-methyl-2-pyrrolidinone, various glycol The amines such as the polyalcohols such as class, trimethylolpropane, ethylenediamine, ethylenediamine, diethylenetriamines.These solvents can individually make With or be used in combination of two or more.Wherein, it is preferably made using water as the aqueous solution of solvent and uses.For above-mentioned shape Into the concentration of the above-mentioned polyvinyl alcohol resin in material (such as aqueous solution), it is not particularly limited, but if in view of coating Property, shelf-stability etc., then be 0.1~15 weight %, be preferably 0.5~10 weight %.
It should be noted that in above-mentioned formation material (such as aqueous solution), as additive, can enumerate such as plasticizer, Surfactant etc..As plasticizer, the polyalcohol such as ethylene glycol, glycerine can be enumerated.As surfactant, example can be enumerated Such as nonionic surfactant.In addition, further, the coupling agents such as silane coupling agent, titanium coupling agent, various thickeninies can also be coordinated Stabilizers such as agent, ultra-violet absorber, antioxidant, heat-resisting stabilizing agent, stabilizer against hydrolysis etc..
Above-mentioned transparent resin layer can be formed by the way that above-mentioned formation material to be coated on polarizer and be dried.It is above-mentioned The coating for forming material is carried out in a manner of dried thickness is reached more than 0.2 μm.There is no special limit for painting work System, can use any suitable method.For example, can use rolling method, spin-coating method, Wound-rotor type stick coating method, dip coating, die coating method, The various methods such as curtain coating, spraying process, knife coating (scraper type rubbing method etc.).
Above-mentioned transparent resin layer (can not have transparent guarantor by the another side that above-mentioned formation material is coated on to polarizer The face of cuticula) and be dried and formed.The coating of above-mentioned formation material is so that dried thickness reaches more than 0.2 μm of side Formula carries out.It is not particularly limited for painting work, any suitable method can be used.For example, rolling method, spin coating can be used The various methods such as method, Wound-rotor type stick coating method, dip coating, die coating method, curtain coating, spraying process, knife coating (scraper type rubbing method etc.). Drying temperature is preferably generally 60~120 DEG C, more preferably 70~100 DEG C.Drying time is preferably 10~300 seconds, More preferably 20~120 seconds.
＜ adhesive phases ＞
Adhesive phase can be set on above-mentioned unilateral protection polarizing coating and the polarizing coating with adhesive phase is made and uses.It is viscous Mixture layer can be according to the prominent form of unilateral protection polarizing coating in the side of transparent resin layer, protective film or polarizer.Can be with Membrane is set on the adhesive phase of the polarizing coating with adhesive phase.
Suitable adhesive can be used when forming adhesive phase, be not particularly limited for its species., can as adhesive Enumerate：Rubber adhesive, acrylic adhesives, silicone adhesive category, carbamates adhesive, vinyl alkyl Ethers adhesive, polyvinyl alcohol series adhesive, polyvinylpyrrolidone class adhesive, polyacrylamide adhesive, fiber Plain class adhesive etc..
In these adhesives, preferably using optical transparence is excellent, shows suitable wetability, coherency and bonding The excellent adhesive of adhesion characteristic and weatherability, heat resistance etc. as property.As the adhesive for showing such feature, Preferably use acrylic adhesives.
As the method for forming adhesive phase, made using following method：Described adhesive is coated on and have passed through Membrane of lift-off processing etc., after dry removing polymer solvent etc. forms adhesive phase, turns on one side protection polarizing coating The method of print, or apply on one side protection polarizing coating above-mentioned adhesive, it is dry remove polymer solvent etc. and on polarizer shape Method of composite adhesives layer etc..It should be noted that in coating adhesive, can also suitably newly add beyond polymer solvent More than one solvents.
As the membrane that have passed through lift-off processing, preferably organosilicon peeling liner is used.Applied by the adhesive of the present invention It is distributed in such pad above and it is dried and is formed in the process of adhesive phase, can root as the method for drying adhesive Suitable method is suitably used according to purpose.It is preferred that using the method being thermally dried to above-mentioned coated film.Heat drying Temperature is preferably 40 DEG C~200 DEG C, more preferably 50 DEG C~180 DEG C, particularly preferably 70 DEG C~170 DEG C.By making to add Hot temperature can obtain the adhesive with excellent adhesion characteristic in above-mentioned scope.
Drying time can suitably use the suitable time.Above-mentioned drying time is preferably 5 seconds~20 minutes, further Preferably 5 seconds~10 minutes, particularly preferably 10 seconds~5 minutes.
As the forming method of adhesive phase, various methods can be used.It is specific enumerable for example：Rolling method, roller lick coating Method, gravure coating process, reverse rubbing method, roller brush method, spraying process, dipping rolling method, stick coating method, knife coating, air knife coating method, leaching Coating, die lip rubbing method, using die coating machine etc. extrusion coating methods the methods of.
The thickness of adhesive phase is not particularly limited, and is, for example, 1~100 μm or so.Preferably 2~50 μm, more preferably 2 ~40 μm, more preferably 5~35 μm.
In the case where described adhesive layer exposes, piece (membrane) the protection adhesive that have passed through lift-off processing can be utilized Layer is untill actual use.
As the constituent material of membrane, can enumerate for example：Polyethylene, polypropylene, polyethylene terephthalate, polyester The suitable thin slices such as the porous materials such as the plastic foils such as film, paper, cloth, non-woven fabrics, net, foamed sheet, metal foil and their layered product Thing etc., but from the excellent aspect of surface smoothness, preferably using plastic foil.
As the plastic foil, as long as the film of described adhesive layer can be protected then to be not particularly limited, can enumerate for example： Polyethylene film, polypropylene screen, polybutene film, polybutadiene film, polymethylpentene film, polychloroethylene film, vinyl chloride copolymer film, Polyethylene terephthalate film, polybutylene terephthalate (PBT) film, polyurethane film, vinyl-vinyl acetate copolymer Film etc..
The thickness of the membrane is usually 5~200 μm, is preferably 5~100 μm or so.Can also be as needed using having Machine silicon class, fluorine class, the releasing agent of chain alkyl class or fatty acid acyl amine, silicon dioxide powder etc. the membrane is demoulded and Antifouling process, the antistatic process for being coated type, being mixed into type, evaporation type etc..Especially it is possible to by organic to suitably carrying out Silicon processing, chain alkyl processing, fluorine processing etc. lift-off processing and further improve the fissility relative to described adhesive layer.
＜ surface protection films ＞
Surface protection film can be set on one side protection polarizing coating.Surface protection film usually has base material film and adhesive Layer, and polarizer is protected by the adhesive phase.
As the base material film of surface protection film, from the viewpoint such as inspectability, managerial, may be selected with isotropism or Close to isotropic membrane material.As its membrane material, for example, can enumerate for example：Polyethylene terephthalate film etc. Polyester resin, cellulosic resin, acetate esters resin, polyether sulfone resin, polycarbonate resin, polyamide-based tree Fat, polyimide based resin, polyolefin resin, polymer transparent as acrylic resin.In these materials, preferably Polyester resin.Base material film can also use the layered product of one kind or two or more membrane material, furthermore it is also possible to use above-mentioned film Stretching thing.The thickness of base material film is usually less than 500 μm, is preferably 10~200 μm.
As the adhesive for the adhesive phase for forming surface protection film, use can be suitably selected with (methyl) acrylic polymer The polymer such as compound, silicone-based polymers, polyester, polyurethane, polyamide, polyethers, fluorine class, rubber are basic polymer Adhesive.From viewpoints such as the transparency, weatherability, heat resistances, preferably using acrylic polymer as basic polymer third Alkene acrylic binder.The thickness (dry film thickness) of adhesive phase can be determined according to required bonding force.Usually 1~ 100 μm or so, preferably 5~50 μm.
It should be noted that in surface protection film, can be opposite in the face with being provided with adhesive phase of base material film Simultaneously, lift-off processing is set using the low cementitious material that have passed through organosilicon processing, chain alkyl processing, fluorine processing etc. Layer.
The other optical layer ＞ of ＜
The unilateral protection polarizing coating of the present invention can be made in actual use with the optical film of other optics layer laminates and Use.It is not particularly limited for above-mentioned optical layer, 1 layer or more than 2 layers of such as reflecting plate, half transmitting plate, phase can be used Potential difference plate (including 1/2 wave plate, quarter wave plate etc.), compensation film for angular field of view etc. are used for the light of the formation of liquid crystal display device etc. sometimes Learn layer.In particular it is preferred that on the unilateral protection polarizing coating of the present invention, further lamination reflecting plate or Transflective plate form Reflective polarizing film or Semitransmissive polarizing coating, the ellipse that further laminated phase plate forms on unilateral protection polarizing coating Polarizing coating or circular polarization film, the wide visual field angle polarizing coating that further lamination compensation film for angular field of view forms on unilateral protection polarizing coating, Or the unilateral protection polarizing coating that further lamination brightness enhancement film forms on unilateral protection polarizing coating.
It can also be used in the optical film that the unilateral protection above-mentioned optical layer of polarizing coating superimposed layer forms in liquid crystal display device Deng manufacturing process in carry out the mode of lamination respectively successively and formed, but when optical film is made in advance lamination, there are product The stability of matter, assembling operation etc. are excellent, the advantages of can improving the manufacturing process of liquid crystal display device etc..Lamination can use The appropriate bonding way such as adhesive phase.When the bonding of polarizing coating, other optical films is protected in above-mentioned one side, their optic axis Suitable arrangement angles can be formed as according to target phase difference characteristic etc..
Unilateral the protection polarizing coating or optical film of the present invention are preferably used for the formation of the various devices such as liquid crystal display device Deng.The formation of liquid crystal display device can be based on existing mode and carry out.That is, liquid crystal display device usually can be by by liquid crystal list The component parts such as the lighting system that member is used with unilateral protection polarizing coating or optical film and as needed suitably assemble simultaneously Import drive circuit etc. and formed, but in the present invention, except using this point of the unilateral protection polarizing coating or optical film of the present invention In addition, do not have particular determination, can be formed according to existing mode.For liquid crystal cells, can also use such as IPS types, Any type of liquid crystal cells such as VA types.
The one side of liquid crystal cells or both sides can be formed in and be configured with the liquid crystal display of unilateral protection polarizing coating or optical film The suitable liquid crystal display devices such as device, the liquid crystal display device for having used backlight or reflecting plate in the illumination system.At this time, Unilateral the protection polarizing coating or optical film of the present invention can be arranged at the one side or both sides of liquid crystal cells.Unilateral protect is set in both sides In the case of protecting polarizing coating or optical film, they can be identical material or different materials.Further, exist Formed liquid crystal display device when, can configure in position 1 layer or more than 2 layers such as diffuser plate, antiglare layer, antireflection The suitable component such as film, protection board, prism array, lens array sheet, light diffusing sheet, backlight.
Embodiment
Hereinafter, enumerate embodiment the present invention will be described, but the present invention and from the limitation of embodiment described below. It should be noted that part and % in each example are weight basis.Hereinafter, it is all to place condition for the room temperature without special provision 23 DEG C, 65%RH.
The making ＞ of ＜ polarizers
It is 0.75% to water absorption rate, non-crystalline M-phthalic acid copolymerization polyethylene terephthalate that Tg is 75 DEG C (IPA is copolymerized PET) film (thickness：100 μm) single side of base material implements sided corona treatment, and to the sided corona treatment face in 25 DEG C of coatings with 9:1 ratio includes polyvinyl alcohol (99.2 moles of degree of polymerization 4200, saponification degree %) and the acetoacetyl modified PVA (degree of polymerization 1200th, acetoacetyl modified rate 4.6%, 99.0 moles of more than % of saponification degree, the Nippon Synthetic Chemical Industry Co., Ltd's system, business The name of an article " GOHSEFIMER Z200 ") aqueous solution and be dried, form the PVA resinoid layers of 11 μm of thickness, made folded Layer body.
The laminated body of gained has been carried out along longitudinal direction (length side in 120 DEG C of baking oven, between the different roller of peripheral speed To) it is stretched to 2.0 times of free end simple tension (assisting tension in atmosphere is handled).
Then, by laminated body 30 DEG C of liquid temperature insoluble bath (coordinate 4 parts by weight of boric acid relative to 100 parts by weight of water and Obtained boric acid aqueous solution) in impregnated of 30 seconds (insoluble processing).
Then, in the dye bath of 30 DEG C of liquid temperature, adjusted in a manner of polarizer is reached given transmissivity iodine concentration, Dip time, has been carried out at the same time dipping.In the present embodiment, coordinating 0.2 parts by weight of iodine relative to 100 parts by weight of water and matching somebody with somebody Impregnated of 60 seconds (dyeing processing) in iodine aqueous solution obtained from closing 1.0 parts by weight of potassium iodide.
Then, (coordinate 3 parts by weight of potassium iodide in the crosslinking bath of 30 DEG C of liquid temperature relative to 100 parts by weight of water and coordinate boric acid Obtained from boric acid aqueous solution) in impregnated of 30 seconds (crosslinking Treatment).
Then, the boric acid aqueous solution for laminated body being impregnated in 70 DEG C of liquid temperature (coordinates 4 weight of boric acid relative to 100 parts by weight of water Amount part simultaneously coordinates aqueous solution obtained from potassium iodide) in while, along longitudinal direction (length side between the different roller of peripheral speed To) simple tension (stretch processing in aqueous solution) has been carried out in a manner of total stretching ratio is reached 5.5 times.
Then, the cleaner bath for laminated body being impregnated in 30 DEG C of liquid temperature (coordinates 4 weight of potassium iodide relative to 100 parts by weight of water Part obtained from aqueous solution) in (cleaning treatment).
Operated more than, obtained including the optical film laminate for the polarizer that thickness is 5 μm.
(making of protective film)
Protective film：It is real to the easy bonding process face of 40 μm (methyl) acrylic resin film with lactone ring structure of thickness Used after applying sided corona treatment.
(making for being applied to the bonding agent of protective film)
By 40 parts by weight of N- hydroxyethyl acrylamides (HEAA), 60 parts by weight of acryloyl morpholine (ACMO) and photoinitiator " IRGACURE 819 " (BASF AG's system) 3 parts by weight mix, and are prepared for ultraviolet hardening bonding agent.
(evaluation method of polyvinyl alcohol resin)
The degree of polymerization of polyvinyl alcohol resin, saponification degree are determined based on JIS K6726.
(active energy beam irradiation)
As active energy beam, visible ray (metal halide lamp for being sealed with gallium) irradiation unit has been used：Fusion Light HAMMER10, the valve of UV Systems companies manufacture：V valves, maximal illumination：1600mW/cm2, cumulative exposure 1000/ mJ/cm2(380~440nm of wavelength).It should be noted that the Sola- that the illumination of visible ray is manufactured using Solatell companies Check systems are determined.
Comparative example 1
The making ＞ of the unilateral protection polarizing coatings of ＜
On the surface of the polarizing coating of above-mentioned optical film laminate so that the thickness of the adhesive layer after curing reaches 0.5 μm Mode is coated with above-mentioned ultraviolet hardening bonding agent, while is bonded said protection film, then, irradiates active energy beam, makes to glue Connect agent curing.Then, amorphism PET base material is peeled off, makes the unilateral protection polarizing coating for having used slim polarizing coating.Obtain One side protection polarizing coating optical characteristics be：Transmissivity 42.8%, degree of polarization 99.99%.
Comparative example 2,3
＜ polyvinyl alcohols form the preparation ＞ of material
The polyvinyl alcohol resin of 99.7 moles of degree of polymerization 2500, saponification degree % is dissolved in pure water, be prepared for solid into Divide the aqueous solution of 4 weight % of concentration.
The making of unilateral protection polarizing coatings of the ＜ with transparent resin layer：Corresponding to Fig. 1 ＞
The light polarizing film (polarizer) of the above-mentioned unilateral protection polarizing coating obtained using Wound-rotor type rod coaters in comparative example 1 Simultaneously (be not provided with protective film is polarized minute surface) coating adjusts to 25 DEG C of above-mentioned polyvinyl alcohol and forms material, and makes its drying Thickness afterwards reaches 1.2 μm or 3.3 μm, then carries out 1 minute heated-air drying in 60 DEG C, has made the one side with transparent resin layer Protect polarizing coating.The optical characteristics of the obtained unilateral protection polarizing coating with transparent resin layer is：Transmissivity 42.8%, degree of polarization 99.99%.
Comparative example 4
＜ polyvinyl alcohols form the preparation ＞ of material
1 part of the degree of polymerization 2500,100 parts of the polyvinyl alcohol resin of 99.7 moles of % of saponification degree and sodium acetate are dissolved in pure water In, it is prepared for the aqueous solution of 4 weight % of solid component concentration.
The making of unilateral protection polarizing coatings of the ＜ with transparent resin layer：Corresponding to Fig. 1 ＞
The light polarizing film (polarizer) of the above-mentioned unilateral protection polarizing coating obtained using Wound-rotor type rod coaters in comparative example 1 Simultaneously (be not provided with protective film is polarized minute surface) coating adjusts to 25 DEG C of above-mentioned polyvinyl alcohol and forms material, and makes its drying Thickness afterwards reaches 1.2 μm, then carries out 1 minute heated-air drying in 60 DEG C, and it is inclined to have made the unilateral protection with transparent resin layer Vibrating diaphragm.The optical characteristics of the obtained unilateral protection polarizing coating with transparent resin layer is：Transmissivity 42.8%, degree of polarization 99.99%.
Comparative example 5~7, embodiment 1~15
＜ polyvinyl alcohols form the preparation ＞ of material
The species of additive (organic salt or inorganic salts) in comparative example 4 or use level are become as shown in table 1 More, in addition, operated in the same manner as comparative example 4, be prepared for the polyvinyl alcohol resin water of 4 weight % of solid component concentration Solution.
The making of unilateral protection polarizing coatings of the ＜ with transparent resin layer：Corresponding to Fig. 1 ＞
The light polarizing film (polarizer) of the above-mentioned unilateral protection polarizing coating obtained using Wound-rotor type rod coaters in comparative example 1 Simultaneously (be not provided with protective film is polarized minute surface) coating adjusts to 25 DEG C of above-mentioned polyvinyl alcohol and forms material, and makes its drying Thickness afterwards is as shown in table 1, then carries out 1 minute heated-air drying in 60 DEG C, and it is inclined to have made the unilateral protection with transparent resin layer Vibrating diaphragm.The optical characteristics of the obtained unilateral protection polarizing coating with transparent resin layer is：Transmissivity 42.8%, degree of polarization 99.99%.
Following evaluations have been carried out to the unilateral protection polarizing coating obtained in above-mentioned comparative example and embodiment.Show the result in table 1.Evaluated to obtained unilateral protection polarizing coating or according to the polarizing coating with adhesive phase that the description below makes.
The preparation ＞ of ＜ acrylic polymers
Added in the 4 neck flasks for possessing agitating vane, thermometer, nitrogen ingress pipe, condenser containing acrylic acid fourth The monomer mixture of 1 part of 99 parts of ester and acrylic acid 4- hydroxybutyls.Further, relative to the monomer mixture (solid into Point) 100 parts, using as the 2 of polymerization initiator, 0.1 part of 2 '-azodiisobutyronitrile and ethyl acetate add together, on one side slowly Stirring on one side import nitrogen, carry out nitrogen displacement after, by the liquid temperature in flask be maintained at 60 DEG C or so carried out 7 it is small when polymerization instead Should.Then, ethyl acetate is added in obtained reaction solution, has obtained solid component concentration and adjusted to 30% and Weight-average molecular Measure the solution of the acrylic polymer for 1,400,000.
(preparation of adhesive composition)
Relative to 100 parts of the solid constituent of aforesaid propylene acids polymers solution, coordinate trimethylolpropane xyxylene Diisocyanate (Mitsui Chemicals, Inc's system：Takenate D110N) 0.1 part, 0.3 part of dibenzoyl peroxide and γ- 0.075 part of glycidoxypropyltrime,hoxysilane (Shin-Etsu Chemial Co., Ltd's system, trade name " KMB-403 "), system For acrylic adhesives solution.
(formation of adhesive phase)
Then, aforesaid propylene acrylic binder solution is equably coated on sprayer and is handled through organic silicon remover The surface for the polyethylene terephthalate film (membrane) crossed, it is 2 points dry in 155 DEG C of air circulating type constant temperature oven Clock, the adhesive phase of 20 μm of thickness is formd on the surface of membrane.
The making ＞ of polarizing coatings of the ＜ with adhesive phase
Then, (it is wherein, to be polarized in comparative example 1 in the transparent resin layer of the obtained unilateral protection polarizing coating of each example Mirror side) on fitting be formed at above-mentioned release sheet (membrane) lift-off processing face adhesive phase, made with the inclined of adhesive phase Vibrating diaphragm.
＜ durabilities：Change rate (optics reliability test) ＞ of degree of polarization
By the obtained unilateral size for protecting polarizing coating to cut into 25mm × 50mm with adhesive, (absorbing direction of principal axis is 50mm).It is small by the unilateral constant temperature and humidity machine for protecting polarizing coating (sample) to put into 85 DEG C/85%RH with adhesive 150 When.Using the spectral transmission analyzer (Dot-3c of color technical research institute in village) with integrating sphere to before putting into and after input The degree of polarization of unilateral protection polarizing coating be determined, obtain：
The change rate (%) of degree of polarization=(1- (degree of polarization before degree of polarization/input after input)).
It should be noted that degree of polarization P is by the way that 2 identical polarizing coatings are overlapped in a manner of both axis of homology are parallel In the case of transmissivity (parallel transmission：Tp the transmissivity in the case of overlapping) and in a manner of both axis of homology are orthogonal (orthogonal transmission：Tc) it is applied to following formula and obtains.Degree of polarization P (%) P (%)={ (Tp-Tc)/(Tp+Tc) }1/2×100
When each transmissivity is by being set to 100% by the complete polarized light obtained after Glan-Taylor prism polarizer, with logical The transmissivity that Y value obtained from crossing 2 degree of visuals field (illuminant-C) progress visibility correction of JIS Z8701 represents.
In table 1, the change rate of degree of polarization is described, and judged the change rate based on following standards.
○：The change rate of degree of polarization is less than 0.4%.
△：The change rate of degree of polarization is for 0.4% less than 0.5%.
×：The change rate of degree of polarization is more than 0.5%.
＜ durabilities：Orthogonal form and aspect (optics reliability test) ＞
By the obtained unilateral size for protecting polarizing coating to cut into 25mm × 50mm with adhesive, (absorbing direction of principal axis is 50mm).It is small by the unilateral constant temperature and humidity machine for protecting polarizing coating (sample) to put into 85 DEG C/85%RH with adhesive 150 When.Using the spectral transmission analyzer (Dot-3c of color technical research institute in village) with integrating sphere to before putting into and after input The unilateral protection polarizing coating with adhesive orthogonal a values (red direction) and orthogonal b values (blue direction) be determined.
Orthogonal b values (blue direction) have been recorded in table 1, and have been judged based on following standards.
○：Orthogonal b values are more than -2.4.
△：Orthogonal b values are more than -3 and for below -2.4.
×：Orthogonal b values are below -3.
The relative ratios ＞ of content of iodine in the content and polarizer of inorganic salts in ＜ transparent resin layers
By equipping the TOF-SIMS (the TRIFT V of Ulvac-Phi manufactures) of gas-cluster ion rifle to transparent resin layer Inorganic salt content and polarizer in content of iodine be determined.
Condition during measure described below.
Etch ion：Ar gas-cluster ions
The primary ions of irradiation：Bi3 2+
Primary ions accelerating potential：30kV
Measure polarity：Anion
While it is etched with argon cluster from the lateral polarizer side of transparent resin layer of unilateral protection polarizing coating, while to depth Section is observed, and extracts the iodine component " I from polarizer respectively-(m/z 127) " (ionic strength a) and carrys out self-induced transparency tree Inorganic salts ingredients " the ex of lipid layer:KI2 -(ionic strength b), calculates their ratio (b/a) to (m/z 293) ".
It is to use potassium iodide as inorganic it should be noted that for the above-mentioned inorganic salts ingredients from transparent resin layer The situation of component.M/z is " mass-charge ratio " (with being worth a considerable amount obtained from atomic weight/molecular weight divided by electric charge), right Inorganic salts ingredients detected the KI as secondary ion2 -(m/z 293)。
Ionic strength b is exported according to inorganic salts ingredients by the description below.
The situation of sodium chloride：Cl-(m/z 35)
The situation of sodium sulphate and zinc sulfate：SO3 -(m/z 80)
The situation of calcium chloride：Cl-(m/z 35)
The resistance to anti-thread breakage ＞ of ＜
By the obtained polarizing coating with adhesive phase cut into vertical 400mm × horizontal 708mm size (absorb direction of principal axis be 400mm) and vertical 708mm × horizontal 400mm size (absorption direction of principal axis is 708mm), in 402mm × horizontal 710mm × thickness 1.3mm Alkali-free glass two sides along crossed Nicol direction be bonded, made sample.The sample is put into 95 DEG C of baking oven 250 it is small when after, take out, with range estimation confirm whether crackle is generated on the polarizing coating with adhesive phase.To 1 sample with 10 Piece carries out the experiment, counts the piece number of the sample cracked, and judged based on following standards.
○：0.
△：1~3.
×：More than 4.
It can be confirmed according to table 1：In embodiment, there is resistance to anti-thread breakage, optics reliability, the blueing of tone can be suppressed For reduced levels.Especially with potassium iodide as inorganic salts (inorganic salts, the alkaline earth gold of alkali metal contained by transparent resin layer The inorganic salts of category) in the case of, compared with other inorganic salts of equivalent use level, the inhibition of blueing is good.Think due to iodine Change the component that potassium is and the potassium composition that contains in polarizer, iodine component are identical, therefore, be easiest to suppress exudation.On the other hand, by Do not have transparent resin layer in comparative example 1, it is thus impossible to meet resistance to anti-thread breakage.In comparative example 2,3, due to transparent resin layer In without organic salt, any of inorganic salts are coordinated, therefore, optics reliability is insufficient, it is impossible to suppresses the blueing of form and aspect For low-level.Although understanding to be combined with organic salt in transparent resin layer in comparative example 4,5, optics reliability is insufficient. In addition, as shown in comparative example 6,7, (inorganic salts of alkali metal, inorganic in addition to alkaline-earth metal using inorganic salts such as zinc salts Salt) as in the case of inorganic salts, it is impossible to it is adequately suppressed blueing.Further, since the metal ion of the inorganic salts such as zinc salt has Make the crosslinked effect of polyvinyl alcohol resin of transparent resin layer, be damaged accordingly, there exist bendability, resistance to anti-thread breakage reduction Tendency.

Claims (12)

1. the unilateral protection polarizing coating of one kind, it is that only in the single side of polarizer there is the unilateral of protective film to protect polarizing coating, wherein,
There is transparent resin layer at least single side of the polarizer,
Across or the transparent resin layer of at least single side of the polarizer is not provided with the protective film, also,
The transparent resin layer contains at least one of inorganic salts of inorganic salts and alkaline-earth metal selected from alkali metal.
2. unilateral protection polarizing coating as claimed in claim 1, wherein, the inorganic salts are iodide.
3. unilateral protection polarizing coating as claimed in claim 2, wherein, the iodide are potassium iodide.
4. as it is according to any one of claims 1 to 3 it is unilateral protect polarizing coating, wherein, the iodine contained in the polarizer into Content (a divided：Ionic strength) with the content (b of inorganic salts ingredients that contains in the transparent resin layer：The ratio between ionic strength) (b/a) it is more than 0.08.
5. as it is according to any one of claims 1 to 4 it is unilateral protect polarizing coating, wherein, the transparent resin layer be by containing Water-soluble resin forms what material was formed.
6. unilateral protection polarizing coating as claimed in claim 5, wherein, the water-soluble resin is polyvinyl alcohol resin.
7. unilateral protection polarizing coating such as according to any one of claims 1 to 6, wherein, the thickness of the transparent resin layer is More than 0.2 μm.
8. unilateral protection polarizing coating such as according to any one of claims 1 to 7, wherein, the thickness of the transparent resin layer is 6 Below μm.
9. unilateral protection polarizing coating such as according to any one of claims 1 to 8, wherein, the thickness of the polarizer is 15 μm Below.
10. as it is according to any one of claims 1 to 9 it is unilateral protect polarizing coating, wherein, the polarizer by monomer to be transmitted The optical characteristics that rate T and degree of polarization P is represented meets that the mode of the condition of following formula is formed：
P ＞-(100.929T-42.4- 1) × 100 (wherein, T ＜ 42.3) or
P >=99.9 (wherein, T >=42.3).
11. a kind of polarizing coating with adhesive phase, it is with unilateral protection polarizing coating according to any one of claims 1 to 10 And adhesive phase.
12. a kind of image display device, it is with unilateral protection polarizing coating according to any one of claims 1 to 10 or right It is required that the polarizing coating with adhesive phase described in 11.
CN201680049359.5A 2015-08-27 2016-08-05 Single-side protective polarizing film, polarizing film with adhesive layer, and image display device Active CN107924016B (en)

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