CN105717569A - Polarizing plate with protection film and laminated body comprising same - Google Patents
Polarizing plate with protection film and laminated body comprising same Download PDFInfo
- Publication number
- CN105717569A CN105717569A CN201510940527.7A CN201510940527A CN105717569A CN 105717569 A CN105717569 A CN 105717569A CN 201510940527 A CN201510940527 A CN 201510940527A CN 105717569 A CN105717569 A CN 105717569A
- Authority
- CN
- China
- Prior art keywords
- protecting film
- polarization plates
- film
- polaroid
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- 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
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
Abstract
The invention provides a polarizing plate with a protection film. The polarizing plate with the protection film includes a polarizing plate which is as thick as T1 ([mu]m) and comprises a Polaroid. The polarizing plate also includes a protection film which is laminated on one surface of the polarizing plate and as thick as T2 ([mu]m). The thickness of the polaroid is below 15 [mu]m. The other surface of the polarizing plate is formed by the surface of a first adhesive layer. The protection film is composed of a second adhesive layer laminated on the above one surface of the polarizing plate and a single-layer resin film laminated on the second adhesive layer, wherein the thickness ratio of T2/T1 is within 0.8-4. A laminated body comprising the polarizing plate with the protection film is also provided.
Description
Technical field
The present invention relates at the polarization plates with protecting film of polarization plates surface stacking protecting film and the duplexer that comprises it.
Background technology
In recent years, for the mobile terminal of smart mobile phone etc, from the viewpoint of design, Portability, large screen, slenderization continue to advance hastily.In order to realize driving for a long time with limited thickness, the polarization plates for using also requires that high brightness, thin light.
What commonly used as polarization plates is utilize polyethenol series bonding agent to fit the polarization plates of the protecting film comprising triacetyl cellulose on the two sides of polyethenol series polaroid in the past.But; consider from viewpoints such as filming, durability, cost, productivity ratio; in recent years; following protecting film is begun to use as protecting film; namely; except triacetyl cellulose, also comprise the diversified resins such as (methyl) acrylic resin, chain polyolefin-based resins, cyclic polyolefin hydrocarbon system resin, and be thin film (referring for example to Japanese Unexamined Patent Publication 2004-245925 publication [0005] section).
Summary of the invention
As it has been described above, in recent years, there is the trend using polarization plates that is thin and that do not have stiffness.This polarization plates has the trend easily producing curling (warpage), for instance especially have easily curling trend when fitting in the resin that the protecting film on two sides of polaroid comprises kind different from each other.Generally speaking polarization plates is taken as being pasted with the protecting film that can peel off for protecting its surface (also referred to as surface protection film.) the polarization plates with protecting film commercially circulate, but trend above-mentioned in the polarization plates with protecting film is also identical.
It is excessively generated curling polarization plates and the polarization plates with protecting film can produce following not good situation, i.e. 1) fracture because applying stress at in-process；2) owing to being mixed into foreign body between protecting film and polarization plates because of curling caused deformation (crooked)；3) when being fitted on image-displaying member, occur laminating mistake or produce bubble to laminating interface in being mixed into.
Thus it is an object of the invention to, it is provided that inhibit the curling polarization plates with protecting film and the duplexer comprising it.
The present invention provides the polarization plates with protecting film shown below and image display device.
[1] a kind of polarization plates with protecting film, it possesses the polarization plates of thickness T1 (μm) comprising polaroid and is laminated in the protecting film of thickness T2 (μm) of one surface,
The thickness of described polaroid is less than 15 μm,
Another surface of described polarization plates is made up of the surface of the first adhesive phase,
Described protecting film is made up of the second adhesive phase being laminated in one surface and the resin molding being laminated in monolayer thereon,
Thickness ratio is in the scope that T2/T1 is 0.8～4.
[2] according to the polarization plates with protecting film recorded in [1], wherein, it is also equipped with being laminated in the isolating membrane on another surface of described polarization plates.
[3] according to the polarization plates with protecting film recorded in [1] or [2], wherein, the thickness T2 of described protecting film is more than 60 μm.
[4] polarization plates with protecting film recorded any one of [1]～[3], wherein, described polarization plates also comprises the blooming beyond described polaroid,
At protecting film described in the surface stacking of described blooming.
[5] according to the polarization plates with protecting film recorded in [4], wherein, described blooming is that brightness improves film.
[6] polarization plates with protecting film recorded any one of [1]～[5], wherein, described resin molding comprises polyester based resin.
[7] a kind of duplexer, it comprises image-displaying member and is laminated in the polarization plates with protecting film recorded any one of [1] thereon～[6].
The curling polarization plates with protecting film and the duplexer comprising it is inhibited according to the present invention it is possible to provide.Can should be suitably used in image display device with the polarization plates of protecting film and the duplexer comprising it.
Accompanying drawing explanation
Fig. 1 is the summary section of an example of the layer composition of the polarization plates with protecting film schematically showing the present invention.
Fig. 2 indicates that the summary section of an example of the layer composition of the polarization plates with protecting film of the present invention.
Fig. 3 indicates that the summary section of another example of the layer composition of the polarization plates with protecting film of the present invention.
Fig. 4 indicates that the summary section of another example of the layer composition of the polarization plates with protecting film of the present invention.
Detailed description of the invention
< is with the polarization plates > of protecting film
(1) with the composition of the polarization plates of protecting film
Fig. 1 is the summary section of an example of the layer composition of the polarization plates with protecting film schematically showing the present invention.With reference to Fig. 1, an example of the polarization plates with protecting film of the present invention is illustrated.The polarization plates with protecting film of the present invention possesses the polarization plates 100 comprising polaroid (not shown in Fig. 1) and is laminated in the protecting film 60 of one surface.Another surface of polarization plates 100, namely it is made up of the surface of the first adhesive phase 31 with the surface of the face opposite side of stacked guard film 60.In other words, the most top layer of the face opposite side with stacked guard film 60 of polarization plates 100 is the first adhesive phase 31.Can also at the outer surface (another surface of polarization plates 100) of the first adhesive phase 31, stacking is for the interim isolating membrane 70 that can peel off protecting this face.On the other hand, the surface surface of protecting film 60 (laminating) of protecting film 60 side of polarization plates 100 can be such as the surface of protecting film, other blooming or the layer that is attached on film.
Protecting film 60 is by resin molding (base material film) 61 and is laminated in the second adhesive phase 62 thereon and constitutes, and is stacked in polarization plates 100 via this adhesive phase laminating layer.
In the present invention, so-called polarization plates 100 is the polarizer including at least polaroid and the first adhesive phase 31, generally also comprises the protecting film fitting in its one or both sides.Polarization plates 100 except protecting film, can also also comprise the layer being attached on film of other the blooming or optical layers etc with the film of optical function different from polaroid etc.The various bloomings comprising protecting film can be fitted via bond layer or adhesive phase.As it has been described above, polarization plates 100 most top layer is the first adhesive phase 31, even if thus on the first adhesive phase 31 when stacking isolating membrane 70, this isolating membrane 70 is also not included in polarization plates 100.
When the thickness of polarization plates 100 being set to T1 (μm), the thickness of protecting film 60 being set to T2 (μm), thickness is set as in the scope of 0.8～4 than T2/T1.Thus just can effectively suppress curling (warpage) of the polarization plates with protecting film.
The polarization plates with protecting film of the present invention is generally individual body of the polarization plates with protecting film.This individual body can be obtained by following operation; namely; the raw material film transported for rolling out continuously from film roll cylinder; the other raw material film that stacking similarly rolls out continuously from film roll cylinder; stacked film tubular wound into a roll by the long size shape of gained; after utilizing this kind of so-called volume to volume mode to produce the polarization plates with protecting film of long size, it is cut and obtains.
The shape of individual body above-mentioned is not particularly limited, but is preferably the square configuration with long limit and minor face, typically rectangle.The length of longer side and a shorter side is not particularly limited, but generally the long limit of individual body is more than 50mm, and minor face is more than 30mm.The size of individual body is more big, more easily produces curling.When size (long limit and/or minor face) is too little, curling problem is inherently difficult to occur.
Below, illustrate with reference to Fig. 2～Fig. 4 example that the layer of polarization plates 100 is constituted, but layer composition is not limited to these examples.
The polarization plates that the polarization plates with protecting film shown in Fig. 2 has is made up of polaroid 10, the first adhesive phase 31 of fitting in the protecting film 21 of one face, the protecting film 22 fitting in another face and the outer surface that is laminated in protecting film 22.The polarization plates that the polarization plates with protecting film shown in Fig. 3 has by polaroid 10, fit in one face protecting film 21, fit in another face protecting film 22, be laminated in the outer surface of protecting film 22 the first adhesive phase 31 and protecting film 21 outer surface via the 3rd adhesive phase 32 stacking as blooming brightness improve film 50 constitute.The polarization plates that the polarization plates with protecting film shown in Fig. 4 has eliminates protecting film 21, at the direct stacking the 3rd in the surface of polaroid 10 adhesive phase 32, has the layer identical with the polarization plates shown in Fig. 3 in addition and constitutes.
Although the diagram of eliminating, but the laminating of polaroid 10 and protecting film 21,22 can use bonding agent to carry out.
(2) polaroid
Polaroid 10 is to have to absorb to have to be parallel to it and absorb rectilinearly polarized light of vibration plane of axle, transmission and have the absorptive-type polaroid of the character with the rectilinearly polarized light absorbing axle orthogonal (parallel with the axis of homology) vibration plane, it is possible to make polyvinyl alcohol resin film adsorb dichromatic pigment the polarizing coating carrying out orientation and obtaining suitably.Polaroid 10 such as can utilize and include: by the operation of polyvinyl alcohol resin film uniaxial tension；By by polyvinyl alcohol resin film dichromatic pigment dyeing so as to adsorb the operation of dichromatic pigment；The operation that the polyvinyl alcohol resin film boric acid aqueous solution having adsorbed dichromatic pigment is processed；And the method for operation carrying out after by the process of boric acid aqueous solution washing manufactures.
As polyvinyl alcohol resin, it is possible to use the resin that the resin saponification of polyvinyl acetate system is obtained.As polyvinyl acetate system resin, except the polyvinyl acetate as the homopolymer of vinyl acetate, it is also possible to enumerate with can with the copolymer etc. of other monomers of vinyl acetate copolymerization.Unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class can be included with the example of other monomers of vinyl acetate copolymerization and there is (methyl) acrylic amide etc. of ammonium.
The saponification degree of polyvinyl alcohol resin is generally 85～100mol%, it is preferred to more than 98mol%.Polyvinyl alcohol resin can also be modified, for instance can also use the polyvinyl formal modifiied with aldehydes or polyvinyl acetal etc..The average degree of polymerization of polyvinyl alcohol resin is generally 1000～10000, it is preferred to 1500～5000.The average degree of polymerization of polyvinyl alcohol resin can be obtained according to JISK6726.
The material this kind of polyvinyl alcohol resin masking obtained is taken as the former material film of polaroid 10 (polarizing coating) and uses.The method of polyvinyl alcohol resin masking is not particularly limited, it is possible to adopt known method.The thickness of the former material film of polyethenol series is not particularly limited, but in order to the thickness of polaroid 10 is set to less than 15 μm, it is common to use the film of 5～35 μm, it is preferred to less than 20 μm.If it is intended to stretched by former for the thickness polyethenol series more than 35 μm material film and obtain the polaroid 10 of thickness less than 15 μm, then needing raising stretching ratio, when being set to below 15 μm by the thickness of polaroid 10, the dimensional contraction under hot environment also can become big.It addition, when thickness is less than 5 μm, disposal during because stretching reduces and the easy not good situation producing cut-out etc when polaroid manufactures.
The uniaxial tension of polyvinyl alcohol resin film or can carry out after dyeing with dyeing before the dyeing of dichromatic pigment simultaneously.When carrying out uniaxial tension after dyeing, this uniaxial tension can also carry out before boric acid processes or in boric acid process.Alternatively, it is also possible to carry out uniaxial tension in these multiple stages.
When uniaxial tension, both can stretch between the roller that peripheral speed is different, it is possible to use hot-rolling single shaft ground stretches single shaft.It addition, uniaxial tension both can be the dry type stretching carrying out in an atmosphere stretching, it is also possible to be stretch in the wet type using solvent or water to make polyvinyl alcohol resin film carry out when expanding stretching.Stretching ratio is generally 3～8 times.
As by the polyvinyl alcohol resin film method with dichromatic pigment dyeing, for instance can adopt this film immersion method in the aqueous solution containing dichromatic pigment.As dichromatic pigment, it is possible to use iodine or dichroic organic dye.And, polyvinyl alcohol resin film is first implemented in the impregnation process in water before processing preferably in dyeing.
Process as the dyeing by iodine, be typically employed in the aqueous solution containing iodine and potassium iodide impregnate polyvinyl alcohol resin film method.The content of the iodine in this aqueous solution is in every 100 weight parts waters, is generally 0.01～1 weight portion.The content of potassium iodide is in every 100 weight parts waters, is generally 0.5～20 weight portion.It addition, the temperature of this aqueous solution is generally 20～40 DEG C.On the other hand, process as the dyeing by dichroic organic dye, be typically employed in the aqueous solution containing dichroic organic dye impregnate polyvinyl alcohol resin film method.Aqueous solution containing dichroic organic dye can also contain the inorganic salts such as sodium sulfate as dyeing assistant.The content of the dichroic organic dye in this aqueous solution is in every 100 weight parts waters, is generally 1 × 10-4～10 weight portions.The temperature of this aqueous solution is generally 20～80 DEG C.
Process as the boric acid after the dyeing by dichromatic pigment, generally adopt the polyvinyl alcohol resin film immersion that has been colored containing the method in boron aqueous acid.When using iodine as dichromatic pigment, potassium iodide should be preferably comprised containing boron aqueous acid.Amount containing the boric acid in boron aqueous acid is in every 100 weight parts waters, is generally 2～15 weight portions.The amount of the potassium iodide in this aqueous solution is in every 100 weight parts waters, is generally 0.1～15 weight portion.The temperature of this aqueous solution can be more than 50 DEG C, for instance is 50～85 DEG C.
Polyvinyl alcohol resin film after boric acid process is generally carried out washing process.Washing processes such as can by carrying out the polyvinyl alcohol resin film immersion having carried out boric acid process in water.The temperature of the water in washing process is generally 5～40 DEG C.
After washing, implement dried and obtain polaroid 10.Dried can use air drier or far infra-red heater to carry out.The thickness of polaroid 10 is less than 15 μm, it is preferred to less than 10 μm.The thickness of polaroid 10 is set to less than 15 μm, and the slimming for polarization plates 100 and then the slimming for image display device are favourable.The thickness of polaroid 10 is generally more than 2 μm (such as more than 5 μm).According to the present invention, even if the thickness of polaroid 10 is thinned to less than 15 μm can also suppress the curling of the polarization plates with protecting film.
Utilize dried, the moisture rate of polaroid 10 is reduced to practical level.Its moisture rate is generally 5～20 weight %, it is preferred to 8～15 weight %.If moisture rate is at below 5 weight %, then can lose the flexibility of polaroid 10, thus having polaroid 10 in this situation damaged after drying or rupture.If it addition, moisture rate is at more than 20 weight %, then having the situation of the poor heat stability of polaroid 10.
(3) protecting film
The protecting film 21,22 that can be laminated in the one or both sides of polaroid 10 can be the polyolefin-based resins comprising and having light transmission (preferably in optically transparent) thermoplastic resin, such as chain polyolefin-based resins (polypropylene-based resin etc.), cyclic polyolefin hydrocarbon system resin (norbornene resin etc.) etc；The cellulose-based resin of triacetyl cellulose, diacetyl cellulose etc；The polyester based resin of polyethylene terephthalate, polybutylene terephthalate (PBT) etc；Polycarbonate-based resin；(methyl) acrylic resin of methyl methacrylate system resin etc；Polystyrene resin；Polyvinyl chloride resin；Acrylonitrile/butadiene/styrene system resin；Acrylonitrile/phenylethylene resin series；Polyvinyl acetate system resin；Vingon system resin；Polyamide series resin；Polyacetals system resin；Noryl system resin；Polysulfones system resin；Polyether sulfone system resin；Polyarylate system resin；Polyamidoimide system resin；The film of polyimides system resin etc..Wherein, it is preferred to use polyolefin-based resins, cellulose-based resin.And so-called in this manual " (methyl) acrylic resin ", represent at least one in acrylic resin and metha crylic resin.In other the term with " (methyl) " also identical.
As chain polyolefin-based resins, except the homopolymer of the chain olefin of polyvinyl resin, acrylic resin etc, it is also possible to enumerate the copolymer being made up of chain olefin of more than two kinds.
Cyclic polyolefin hydrocarbon system resin is the general name of the resin being polymerized as polymerized unit using cyclic olefin.If enumerating the concrete example of cyclic polyolefin hydrocarbon system resin, then for open loop (being total to) polymer of cyclic olefin, the addition polymer of cyclic olefin, the copolymer (representational is random copolymer) of chain olefin of cyclic olefin and ethylene, propylene etc and the graft polymers that they have been modifiied with unsaturated carboxylic acid or derivatives thereof and their hydride etc..Wherein, it is preferred to use employ the norbornene resin of the norborneol alkene monomer such as norborene or condensed ring norborneol alkene monomer as cyclic olefin.
So-called cellulose-based resin, refers to part or all of cellulose organic ester that instead of with acetyl group, propiono and/or bytyry or cellulose mixed organic acid ester of the hydrogen atom in the cellulosic hydroxyl obtained by raw celluloses such as velveteen (Cotton Gossypii リ Application タ) or wood pulps (broad leaf tree wood pulp, coniferous tree wood pulp).For example, it is possible to enumerate the resin being made up of cellulosic acetas, propionic ester, butyrate and their mixed ester etc..Wherein, it is preferable that triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate, cellulose acetate butyrate.
(methyl) acrylic resin is the polymer containing the Component units coming from (methyl) acrylic monomer.This polymer is the polymer containing methacrylate in the typical case.The ratio being preferably the construction unit coming from methacrylate is the polymer containing more than 50 weight % relative to entire infrastructure unit.(methyl) acrylic resin both can be the homopolymer of methacrylate, it is also possible to be the copolymer of Component units containing the polymerizable monomer coming from other.In this situation, the ratio of the Component units coming from other polymerizable monomer is less than 50% preferably with respect to entire infrastructure unit.
As the methacrylate that may be constructed (methyl) acrylic resin, it is preferable that alkyl methacrylate.As alkyl methacrylate, it is possible to enumerate the alkyl methacrylate that carbon number is 1～8 of the alkyl of methyl methacrylate, ethyl methacrylate, n propyl methacrylate, isopropyl methacrylate, n-BMA, isobutyl methacrylate, Tert-butyl Methacrylate, 2-Ethylhexyl Methacrylate, cyclohexyl methacrylate, 2-hydroxyethyl methacrylate etc.The carbon number of alkyl contained in alkyl methacrylate is preferably 1～4.In (methyl) acrylic resin, methacrylate both can be used alone or two or more kinds may be used.
As other the polymerizable monomer above-mentioned that may be constructed (methyl) acrylic resin, it is possible to enumerate acrylate and other the compound in molecule with polymerism carbon-to-carbon double bond.Other polymerizable monomer both can be used alone or two or more kinds may be used.As acrylate, it is preferable that alkyl acrylate.As alkyl acrylate, it is possible to enumerate the alkyl acrylate etc. that carbon number is 1～8 of the alkyl of acrylic acid methyl ester., ethyl acrylate, n-propyl, isopropyl acrylate, n-butyl acrylate, Isobutyl 2-propenoate, tert-butyl acrylate, 2-EHA, cyclohexyl acrylate, acrylic acid 2-hydroxy methacrylate etc.The carbon number of alkyl contained in alkyl acrylate is preferably 1～4.In (methyl) acrylic resin, acrylate both can be used alone or two or more kinds may be used.
The compound in molecule with polymerism carbon-to-carbon double bond as other, it is possible to enumerate the vinyl cyanide compound of the vinyl compounds or acrylonitrile etc such as ethylene, propylene, styrene.Other the compound in molecule with polymerism carbon-to-carbon double bond both can be used alone or two or more kinds may be used.
The value controlling the phase difference value of protecting film 21,22 for being suitable for the image display devices such as liquid crystal indicator is also useful.Such as, in the liquid crystal indicator of face internal conversion (IPS) pattern, phase difference value is preferably used as protecting film 22 and is essentially the film of zero.So-called phase difference value is essentially zero, phase difference value R in face when referring to wavelength 590nm0For below 10nm, thickness direction phase difference value R during wavelength 590nmthAbsolute value be below 10nm, thickness direction phase difference value R during wavelength 480～750nmthAbsolute value be below 15nm.
According to the pattern of liquid crystal indicator, protecting film 21,22 can also be stretched and/or shrinks processing, give suitable phase difference value.For example, it is possible to for the purpose compensating visual angle, use the phase separation layer (or film) of single or multiple lift structure as protecting film 22.In this situation, polarization plates 100 can be the elliptical polarization plate of the stepped construction comprising polaroid 10 and phase separation layer or circularly polarizing plate or the polarization plates etc. having viewing angle compensation function concurrently comprising phase separation layer.
The thickness of protecting film 21,22 is generally 1～100 μm, but considers to be preferably 5～60 μm from viewpoints such as intensity, the property disposed, more preferably 5～50 μm.If the thickness within the scope of this, it is possible to polaroid 10 is carried out mechanical protection, if exposed to polaroid under hygrothermal environment 10 without contraction, it is possible to the optical characteristics remained stable for.Although making protecting film 21,22 more thin, more easily produce curling, but according to the present invention, even if the thickness of protecting film 21,22 is such as thinned to less than 30 μm, it is also possible to suppress curling.
From the viewpoint of filming, polarization plates 100 can be the composition without at least any one party in protecting film 21,22, but at least one face preferably in polaroid 10 possesses protecting film.Although when only easily produce when the folded protecting film of a surface layer of polaroid 10 curling, but according to the present invention, even if can also suppress curling in such cases.
When only when the folded protecting film of a surface layer of polaroid 10; in the face of the face opposite side with stacked guard film of polaroid 10, the actinic energy ray curable resion composition identical with active energy ray-curable bonding agent described later the protective layer formed can also be set.By arranging protective layer, even only there is the composition of protecting film at a mask of polaroid 10, it is also possible to more efficiently suppress the deterioration of the curling or polaroid 10 changed along with humidity.
When protecting film is fitted on the two sides of polaroid 10, these protecting film both can be made up of thermoplastic resin of the same race, it is also possible to is made up of thermoplastic resin not of the same race.It addition, thickness both can be identical, it is also possible to different.Additionally, both can have identical phase difference characteristics, it is possible to have different phase difference characteristics.
At least any one party of protecting film 21,22 can also be the protecting film of surface-treated layer (coating) or the optical layers possessing hard conating, antiglare layer, light diffusion layer, phase separation layer (having the phase separation layer etc. of the phase difference value of 1/4 wavelength), anti-reflection layer, anti-static electricity interference layer, stain-proofing layer etc at its outer surface (face with polaroid 10 opposite side).
If be laminated in the protecting film on the two sides of polaroid 10 composition (resin types, thickness, surface-treated layer presence or absence etc.) different from each other, then easily produce curling, but according to the present invention, can also suppress curling in such cases.
Protecting film 21,22 such as can be fitted on polaroid 10 via bond layer.As the bonding agent forming bond layer, it is possible to use water system bonding agent, active energy ray-curable bonding agent or Thermocurable bonding agent, it is preferred to water system bonding agent, active energy ray-curable bonding agent.
As water system bonding agent, it is possible to enumerate bonding agent, water system two-liquid type carbamate system emulsion adhesive of being made up of polyvinyl alcohol resin aqueous solution etc..Wherein it is suitable for using the water system bonding agent being made up of polyvinyl alcohol resin aqueous solution.As polyvinyl alcohol resin, except the saponifying polyvinyl acetate of the homopolymer as vinyl acetate is processed and except the alcotex that obtain, it is also possible to use polyvinyl alcohol based copolymer vinyl acetate and the copolymer saponification process of other monomers that can be copolymerized therewith obtained or by the modified polyvinylalcohol based polymer etc. that modifiied of their hydroxylic moiety ground.Water system bonding agent can contain the cross-linking agent such as aldehyde compound (Biformyl etc.), epoxide, melamine based compound, methylol compound, isocyanate compound, amines, multivalent metal salt.
When using water system bonding agent, it is preferable that after being fitted with protecting film 21,22 by polaroid 10, implement the drying process for removing water contained in water system bonding agent.After drying process, the curing step carrying out ripening can also be set.Temperature during ripening is generally 20～45 DEG C.
Above-mentioned so-called active energy ray-curable bonding agent, refer to the bonding agent being occurred to solidify by the active energy beam of irradiation ultraviolet radiation or electron beam etc, for instance the solidification compound containing polymerizable compound and Photoepolymerizationinitiater initiater, the solidification compound containing light reactive resin, the solidification compound etc. containing resin glue and photoreactivity cross-linking agent can be enumerated.It is preferably ultra-violet solidified bonding agent.As polymerizable compound, it is possible to enumerate the photopolymerization monomer of photo-curable epoxy monomer, photo-curable (methyl) acrylic monomer, photo-curable carbamate system monomer etc or come from the oligomer of photopolymerization monomer.As Photoepolymerizationinitiater initiater, it is possible to enumerate the Photoepolymerizationinitiater initiater of the material in the active center producing Neutral radical, radical anion, radical cation etc containing the irradiation because of active energy beam.As the active energy ray-curable bonding agent containing polymerizable compound and Photoepolymerizationinitiater initiater, it may be preferred to use the mixture containing photo-curable epoxy monomer and the solidification compound of light cationic polymerization initiators, the solidification compound containing photo-curable (methyl) acrylic monomer and optical free radical polymerization initiator or these solidification compounds.
As photo-curable epoxy monomer, it is preferable that cycloaliphatic epoxy.So-called cycloaliphatic epoxy, refers to that the carbon atom with ester ring type ring in molecule with more than 1 collectively forms the compound of the structure of oxirane ring.Cycloaliphatic epoxy both can be used alone or two or more kinds may be used.So-called " with the structure that the carbon atom of ester ring type ring collectively forms oxirane ring ", (CH from structure as shown below2)mIn remove one or more hydrogen atoms and the group of form that obtains.In following formula, m is the integer of 2～5.
[changing 1]
Thus, remove (CH2)mIn one or more hydrogen atoms and the compound that is bonded with other chemical constitution of the group of form that obtains just can become cycloaliphatic epoxy.(CH2)mIn one or more hydrogen atom can also be replaced rightly by the straight-chain alkyl such as methyl, ethyl.In cycloaliphatic epoxy, from the viewpoint of demonstrating excellent cementability, it is preferable that have oxabicyclohexane ring (in above-mentioned formula the material of m=4) or the cycloaliphatic epoxy of oxabicyclo heptane ring (in above-mentioned formula the material of m=5).Exemplify the cycloaliphatic epoxy being preferably used in detail below.
[changing 2]
When using active energy ray-curable bonding agent; after polaroid 10 is fitted with protecting film 21,22; it is dried operation as required, then carries out the curing process making active energy ray-curable bonding agent solidify by irradiating active energy beam.Thus, when using active energy ray-curable bonding agent, bond layer solidifies nitride layer for it.The light source of active energy beam is not particularly limited, but have preferably in below wavelength 400nm and send out ultraviolet photodistributed, specifically, it is possible to use low pressure mercury lamp, middle medium pressure mercury lamp, high-pressure mercury-vapor lamp, extra-high-pressure mercury vapour lamp, chemical lamp, black light lamp, microwave-excitation finsen lamp, metal halide lamp etc..
When by polaroid 10 with protecting film 21,22 laminating, in order to improve cementability, it is possible to the binding face of at least any one party in them is implemented saponification process, sided corona treatment, Cement Composite Treated by Plasma etc..
When protecting film is fitted on the two sides of polaroid 10, both can be bonding agent of the same race for the bonding agent of these protecting film of fitting, it is also possible to be bonding agent not of the same race.Although easily produce curling when using bonding agent not of the same race, but according to the present invention, can also suppress curling in such cases.
(4) other bloomings
Polarization plates 100 can comprise other bloomings beyond polaroid 10 and protecting film 21,22, and its typical example is that brightness improves film 50 and phase retardation film.When polarization plates 100 comprises other bloomings, protecting film 60 can also be laminated in the surface of this blooming.
Brightness improves film 50 also referred to as reflective polarizing film, uses the polarized light conversion element with the function that the emergent light from light source (backlight) is separated into transmission-polarizing light and polarization by reflection light or scattering polarization light.Being arranged on polaroid 10 by brightness being improved film 50, it is possible to utilize the return light (again light) as polarization by reflection light or scattering polarization light, making the outgoing efficiency of the rectilinearly polarized light of injection from polaroid 10 improve.Brightness improves film 50 and can be laminated on polaroid 10 via adhesive phase (the 3rd adhesive phase 32).Other the film of sandwiched protecting film etc between film 50 can also be improved at polaroid 10 and brightness.
It can be such as anisotropic emission polaroid that brightness improves film 50.One example of anisotropic emission polaroid is the rectilinearly polarized light of one direction of vibration of transmission and reflects the multiple thin film of anisotropy of rectilinearly polarized light of another direction of vibration, and its concrete example is 3M company system " DBEF " (with reference to Japanese Unexamined Patent Publication 4-268505 publication etc.).An other example of anisotropic emission polaroid is the complex of cholesteric crystal layer and λ/4 plate, and its concrete example is " PCF " (with reference to the Japanese Unexamined Patent Publication 11-231130 publication etc.) of day east electrician.Another example of anisotropic emission polaroid is reflecting grating polaroid, and its concrete example is the metal gate reflecting polarizer (with reference to No. 6288840 description of U.S. Patent No. etc.) that also can penetrate polarization by reflection light after metal is implemented microfabrication in visible region, the film (with reference to Japanese Unexamined Patent Publication 8-184701 publication etc.) adding in polymer matrix by metal particle and stretching and obtain.
The binding face with the 3rd adhesive phase 32 that brightness can also be improved in film 50 carries out surface activation process in advance.Thus, it is possible to be formed under hygrothermal environment to be difficult to produce the 3rd adhesive phase 32 and brightness improves stripping between film 50, polarization plates 100 that wet heat durability is excellent.Process as surface activation, it is possible to enumerate the dry process of sided corona treatment, Cement Composite Treated by Plasma, discharge process (glow discharge process etc.), flame treatment, ozonization, UV ozonization, ionization activity Irradiation (UV treatment, electron beam treatment etc.) etc；Employ water or the wet processed of the ultrasonic Treatment of acetone equal solvent, alkali process, anchoring coating (ア Application カ U ト) process etc.These process both can carry out individually, it is also possible to combines two or more.Wherein, from the viewpoint of the film processing drum continuously, it is preferable that sided corona treatment, Cement Composite Treated by Plasma.
Improve the outer surface of film 50, it is also possible to surface-treated layer (coating) or the optical layers of hard conating, antiglare layer, light diffusion layer, phase separation layer (having the phase separation layer etc. of the phase difference value of 1/4 wavelength), anti-reflection layer, anti-static electricity interference layer, stain-proofing layer etc are set in brightness.Utilize the formation of this layer, it is possible to improve the homogeneity of the adaptation with backlight adhesive tape, display image.Brightness improves the thickness of film 50 and is generally 10～100 μm, but from the viewpoint of the filming of polarization plates 100, it is preferred to 10～50 μm, more preferably 10～30 μm.
(5) adhesive phase (pressure sensitive bond layer)
First adhesive phase 31 is arranged in the adhesive phase of the outmost surface of polarization plates 100, it is possible to for the polarization plates with protecting film is fitted in image-displaying member (such as liquid crystal cells) or other optical components.3rd adhesive phase 32 is to (other bloomings of such as brightness raising film 50 etc and polaroid 10 or protecting film 21) laminating between the blooming of composition polarization plates 100 be used.First adhesive phase the 31, the 3rd adhesive phase 32 can be constituted as the adhesive composition of main constituent in order to the resin of (methyl) acrylic acid series, rubber series, carbamate system, ester system, silicone-based, polyvingl ether system etc.Wherein, the adhesive composition using excellent (methyl) acrylic resin such as the transparency, weatherability, thermostability as matrix polymer it is suitably for.Adhesive composition can also be active energy ray curable, thermohardening type.
As (methyl) acrylic resin (matrix polymer) used in adhesive composition, for instance be suitable for using the one kind or two or more polymer as monomer or the copolymer of (methyl) acrylate using (methyl) butyl acrylate, (methyl) ethyl acrylate, (methyl) Isooctyl acrylate monomer, (methyl) 2-EHA etc.In matrix polymer, it is preferable that make polar monomer carry out copolymerization.As polar monomer, such as can enumerate the monomer with carboxyl, hydroxyl, amide groups, amino, epoxy radicals etc. of (methyl) acrylic acid, (methyl) acrylic acid 2-hydroxy propyl ester, (methyl) Hydroxyethyl Acrylate, (methyl) acrylamide, N, N-dimethyl aminoethyl (methyl) acrylate, (methyl) glycidyl acrylate etc.
Adhesive composition can also contain only above-mentioned matrix polymer, but generally possibly together with cross-linking agent.As cross-linking agent, it is possible to exemplify the metal ion belonging to more than divalent and form the cross-linking agent of carboxylic metallic salt between carboxyl；Belong to polyamino compound and between carboxyl, form the cross-linking agent of amido link；Belong to polyepoxides or polyhydric alcohol and between carboxyl, form the cross-linking agent of ester bond；Belong to polyisocyanate compounds and between carboxyl, form the cross-linking agent of amido link.Wherein, it is preferable that polyisocyanate compounds.
So-called active energy ray curable adhesive composition, it it is the adhesive composition with following character, namely, the character that there is the irradiation of the active energy beam being subject to ultraviolet or electron beam etc and solidify, at active energy beam pre-irradiation, also there is cohesive and can be closely sealed with adherends such as films, it is possible to solidify adjust closing force because of the irradiation of active energy beam.Active energy ray curable adhesive composition is preferably ultraviolet hardening.Active energy ray curable adhesive composition is except matrix polymer, cross-linking agent, possibly together with active energy beam polymerizable compound.Further according to needs, sometimes also contain Photoepolymerizationinitiater initiater, photosensitizer etc..
Adhesive composition can contain for giving the additives such as resin beyond light scattering microgranule, pearl (resin bead, bead etc.), glass fibre, matrix polymer, viscosifier, filler (metal powder or other inorganic powder etc.), antioxidant, UV absorbent, dyestuff, pigment, coloring agent, defoamer, preservative, Photoepolymerizationinitiater initiater.
First adhesive phase 31 and the 3rd adhesive phase 32 by being coated on base material by the organic solvent diluting liquid of above-mentioned adhesive composition and so as to can dry and be formed.Base material can be polaroid 10, protecting film 21,22, brightness improve other bloomings of film 50 etc, isolating membrane (such as isolating membrane 70) etc..When employing active energy ray curable adhesive composition, it is possible to make the solidfied material with required curing degree by the adhesive phase formed is irradiated active energy beam.
The thickness of the first adhesive phase 31 and the 3rd adhesive phase 32 can be 1～40 μm, but from the viewpoint of the viewpoint of the filming of polarization plates 100 and suppress the change in size of polarization plates 100 while keeping good processability, it is preferable that it is set to 3～25 μm (they are such as 3～20 μm, are more preferably 3～15 μm).
3rd adhesive phase 32 is preferably in the storage elastic modulus demonstrating 0.15～1MPa in the temperature range of 23～80 DEG C.Thus, it is possible under hygrothermal environment, suppress the change in size easily produced along with the contraction of polaroid 10, improve the durability of polarization plates 100.Further, since when the image display device being equipped with polarization plates 100 is positioned under hygrothermal environment, it is also possible to suppress the movement of polarization plates 100, therefore can improve the reliability of image display device.
So-called " demonstrating the storage elastic modulus of 0.15～1MPa in the temperature range of 23～80 DEG C ", refers to that storage elastic modulus is all the value in above-mentioned scope under the arbitrary temp of this scope.Due to storage elastic modulus generally along with temperature raise be gradually reduced, if therefore 23 DEG C and 80 DEG C time storage elastic modulus both fall within above-mentioned scope, then can be considered as the storage elastic modulus demonstrating in above-mentioned scope at the temperature of this scope.The storage elastic modulus of the 3rd adhesive phase 32 can use commercially available determination of viscoelasticity device, the determination of viscoelasticity device " DYNAMICANALYZERRDAII " of such as REOMETRIC company measures.
As the method being used for storage elastic modulus is adjusted to above-mentioned scope, can enumerate in matrix polymer or to possibly together with in the adhesive composition of cross-linking agent, then add oligomer and specifically add the oligomer of carbamate (methyl) acrylic ester again and make active energy ray curable adhesive composition (being preferably ultraviolet-curing adhesive composition).More preferably irradiate active energy beam and make adhesive phase moderately solidify.
The storage elastic modulus of the first adhesive phase 31 both can be identical with the 3rd adhesive phase 32, it is also possible to different.
(6) isolating membrane
Isolating membrane 70 is the film temporarily attached to protect its surface before being fitted in by the first adhesive phase 31 on image-displaying member (such as liquid crystal cells) or other optical component.Isolating membrane 70 is generally made up of the thermoplastic resin film that one side implements demoulding process, and this demoulding processes face and is fitted on the first adhesive phase 31.The thermoplastic resin constituting isolating membrane 70 can be such as the polyester based resin etc. of the polyethylene-based resin of polyethylene etc, the polypropylene-based resin of polypropylene, polyethylene terephthalate or PEN etc.Surface at the 3rd adhesive phase 32, it is also possible to protect this surface in order to interim before improving film 50 blooming such as grade in laminating brightness, and attach isolating membrane same as above.The thickness of isolating membrane 70 is such as 10～50 μm.
(7) protecting film
Protecting film 60 is by resin molding 61 and is laminated in the second adhesive phase 62 thereon and constitutes.Protecting film 60 is the film on the surface for protecting polarization plates 100, peels off removing together with the second adhesive phase 62 being had with it after the polarization plates with protecting film of generally fitting on such as image-displaying member or other optical component.
The resin constituting resin molding 61 can be such as the thermoplastic resins such as the polyester based resin of the polyethylene-based resin of polyethylene etc, the polypropylene-based resin of polypropylene, polyethylene terephthalate or PEN etc, polycarbonate-based resin.It is preferably the polyester based resins such as polyethylene terephthalate.Resin molding 61 both can be single layer structure can also be multiple structure, but considers from the viewpoint such as ease of manufacturing and manufacturing cost, it is preferred to single layer structure.For the second adhesive phase 62, it is possible to quote the aforesaid description about the first adhesive phase the 31, the 3rd adhesive phase 32.
(8) the thickness ratio of protecting film and polarization plates
The ratio T2/T1 of thickness T2 (μm) of protecting film 60 and thickness T1 (μm) of polarization plates 100 is set as in the scope of 0.8～4.By making T2/T1 be more than 0.8, can suppress curling significantly with compared with the situation of 0.8.T2/T1 is preferably more than 1.If T2/T1 is more than 4, then unfavorable from the viewpoint of the thickness of the polarization plates with protecting film and manufacturing cost.Owing to protecting film 60 is to be stripped removing, the film that will not residue in final products (after being such as fitted on image-displaying member) afterwards in the actually used of the polarization plates with protecting film; even if therefore increasing the thickness T2 of protecting film 60, without the slimming hindering the image display device applying the polarization plates with protecting film.
The thickness T2 of protecting film 60 can be such as 60～200 μm, it is preferred to 70～150 μm, more preferably 80～120 μm.When thickness T2 is less than 60 μm, can be difficult to make thickness than T2/T1 in above-mentioned scope.If it addition, thickness T2 is more than 200 μm, then from the viewpoint of cost, roller conveyance property, protecting film 60 re-workability unfavorable.On the other hand, the thickness T1 of polarization plates 100 is generally 20～200 μm, it is preferred to 30～150 μm, more preferably 40～120 μm, more preferably 50～100 μm.
The present invention is especially advantageous when following: includes polarization plates 100 contained in the polarization plates with protecting film and has, for benchmark, the situation etc. that asymmetrical layer is constituted with polaroid 10, has the situation easily producing curling composition.The example easily producing curling composition is as follows.
(a) polaroid 10 and/or the thin composition of protecting film 21,22；
B bond layer that () is located between polaroid 10 and protecting film is the composition of the solidification nitride layer of active energy ray-curable bonding agent；
C () is only fitted with the composition of protecting film in the one side of polaroid 10；
D () be fitted with protecting film in a face of polaroid 10, be fitted with the composition of blooming (brightness improves film etc.) beyond protecting film in another face；
(e) fit in the protecting film on the two sides of polaroid 10 composition (resin types, thickness, surface-treated layer presence or absence etc.) composition different from each other；
(f) for the two sides of polaroid 10 fit protecting film bond layer by constituting that the bonding agent of kind different from each other is formed；
G () is fitted with protecting film and is fitted with other the composition of blooming on a protecting film on the two sides of polaroid 10；
(h) in addition with polaroid 10 be benchmark, the film of side and the total number of the layer composition different from the total number of the film of opposite side and layer.
< duplexer, liquid crystal panel and image display device >
The polarization plates with protecting film of the present invention can be applied suitably to comprise image-displaying member and be laminated in the duplexer of the polarization plates with protecting film thereon.This duplexer can fit on image-displaying member via its first adhesive phase 31 (be when having isolating membrane 70 peeled off removing after) with the polarization plates of protecting film.After being fitted on image-displaying member by the polarization plates with protecting film, in the required moment, protecting film 60 is peeled off removing.This duplexer can be liquid crystal panel or its manufacture intermediate of the polarization plates comprising image-displaying member with being laminated in its one or both sides.Protecting film 60 after constructing duplexer, construct protecting film 60 of having fitted state liquid crystal panel after or be stripped removing after using the liquid crystal panel of state of protecting film 60 of having fitted to construct image display device etc..Generally as in the final products of image display device, protecting film 60 is stripped removing.
Image display device can be the device that liquid crystal indicator, organic EL display etc. are any, but is preferably liquid crystal indicator.Liquid crystal indicator possesses liquid crystal panel and backlight, and described liquid crystal panel possesses the liquid crystal cells as image-displaying member.When constructing liquid crystal indicator, the polarization plates with protecting film of the present invention both may be used for being arranged in the polarization plates of observation side; can be used for being arranged in the polarization plates of backlight side; can be also used in the polarization plates of observation side and backlight side both sides, but preferably the polarization plates with protecting film of the present invention is at least used in the polarization plates of backlight side.
[embodiment]
Hereinafter, embodiment and comparative example will be provided and the present invention will be carried out more specific description, but the present invention will not be limited by these examples.In the following examples, phase difference value R in the face of the film of polarization plates with protecting film or the thickness of layer, film is constituted0And thickness direction phase difference value Rth, adhesive phase storage elastic modulus and be measure according to method below with the amount of curl of the polarization plates of protecting film.
(1) thickness
The digital micrometer " MH-15M " using (strain) NIKON measures.
(2) phase difference value R in faceeAnd thickness direction phase difference value Rth
The prince as the phase contrast instrument being principle with parallel-nicol circumgyration is used to measure " KOBRA-ADH " that machine (strain) is made, 23 DEG C of light measurements with wavelength 590nm, 483nm or 755nm.
(3) storage elastic modulus
The storage elastic modulus G ' of adhesive phase measures according to following (I)～(III).
(I) from adhesive phase, each 25 ± 1mg takes out 2 samples in ground, is formed separately as approximate sphericity.
(II) sample of the approximate sphericity of gained is attached to the upper and lower surface of I type fixture, upper and lower surface is all sandwiched with L-type fixture.The composition measuring sample is L-type fixture/binding agent/I type fixture/binding agent/L-type fixture.
(III) use IT measurement to control the Measurement of Dynamic Viscoelasticity device " DVA-220 " that (strain) makes, measure the storage elastic modulus G ' of the sample so made when temperature 23 DEG C or 80 DEG C, frequency 1Hz, initial strain 1N.
(4) amount of curl
Individual body of the polarization plates with protecting film of the state of isolating membrane for stacking so that it is for convex one face-down placing in planar table.In this condition, measure the height of 4 corners distance planar table respectively, using their meansigma methods as an amount of curl.It addition, individual body of the polarization plates with protecting film peeling off the state eliminating isolating membrane is carried out identical mensuration, using its result as secondary coil amount.
(making of polaroid)
Utilize dry type stretching longitudinal direction uniaxial tension for about 5 times the polyvinyl alcohol films (average degree of polymerization about 2400,99.9 moles of more than % of saponification degree) of thick 20 μm, after keeping tensioned state to impregnate 1 minute in the pure water of 60 DEG C unchangeably again, impregnate 60 seconds in the aqueous solution of weight ratio is 0.05/5/100 28 DEG C of iodine/potassium iodide/water.Thereafter, impregnate 300 seconds in the aqueous solution of weight ratio is 8.5/8.5/100 72 DEG C of potassium iodide/boric acid/water.Next, after cleaning 20 seconds with the pure water of 26 DEG C, it is dried process at 65 DEG C, obtains the polaroid that gas absorption quantity on polyvinyl alcohol film has the thickness 7 μm of iodine.
(with hard conating brightness improve film making)
The face improving film (" AdvancedPolarizedFilm, the Version4 " of 3M company) the brightness of thick 17 μm forms hard conating, and the brightness with hard conating obtaining thick 20 μm improves film.
(preparation of protecting film)
Prepare following 2 kind protecting film:
■ gross thickness T2 is the protecting film A of 93 μm；" LDM series " of LGChem company (be made up of thick 18 μm and resin molding for the second adhesive phase of acrylic acid series and the thickness 75 μm that comprises polyethylene terephthalate),
■ gross thickness T2 is the protecting film B of 58 μm；" SAT-4238TF-JSL " (the constituting with the resin molding of the thickness 38 μm comprising polyethylene terephthalate by thickness 20 μm and for the second adhesive phase of acrylic acid series) of (strain) Sun-A-Kaken.
(preparation of protecting film)
Prepared cyclic polyolefin resin film that Japanese Zeon (strain) makes (thick 13 μm, wavelength 590nm time face in phase difference value ReThickness direction phase difference value R when=0.8nm, wavelength 590nmthThickness direction phase difference value R when=3.4nm, wavelength 483nmthThickness direction phase difference value R when=3.5nm, wavelength 755nmth=2.8nm).
(preparation of the first adhesive phase)
Prepare processed, by the demoulding implementing the isolating membrane comprising polyethylene terephthalate of the thickness 38 μm that the demoulding processes, the commercially available adhesive phase with isolating membrane that face is provided with the acrylic adhesive layer of thick 20 μm as the first adhesive phase with isolating membrane.The storage elastic modulus of this adhesive phase is 0.05MPa at 23 DEG C, is 0.04MPa at 80 DEG C.
(making of the 3rd adhesive phase)
By the organic solvent solution die coating machine of urethane acrylate oligomer and isocyanate-based cross-linking agent of with the addition of in butyl acrylate and acrylic acid copolymer with after on the demoulding process face of the isolating membrane comprising polyethylene terephthalate making the mode that dried thickness is 5 μm be coated on to implement the thickness 38 μm that the demoulding processes, so as to dry, obtain the 3rd adhesive phase with isolating membrane.The storage elastic modulus of this adhesive phase is 0.40MPa at 23 DEG C, is 0.18MPa at 80 DEG C.
(preparation of water system bonding agent)
Relative to water 100 weight portion, dissolve carboxy-modified polyvinyl alcohol (" KL-318 " of (strain) Kuraray) 3 weight portions, prepare polyvinyl alcohol water solution.In the aqueous solution of gained be 1.5 weight portions relative to water 100 weight portion ratio mixing water soluble polyamide epoxy resin (" SumirezResin650 (30) ", solid component concentration 30 weight % that ridge, field chemical industry (strain) is made), obtain water system bonding agent.
< embodiment 1 >
Utilize below step, produce and there is the polarization plates with protecting film that the layer identical with Fig. 4 is constituted.First, above-mentioned water system bonding agent is used to fit as the protecting film preparing above protecting film 22 in the one side of above-mentioned polaroid 10.Before laminating, the binding face with polaroid 10 of protecting film 22 is implemented 15.9kJ/m2Sided corona treatment.Thereafter, at 80 DEG C so as to dry 5 minutes, 40 DEG C of ripenings 168 hours.
Then, protecting film 22 with the face of polaroid 10 opposite side on fit the first above-mentioned adhesive phase 31 (there is isolating membrane 70 at outer surface).Before laminating, the binding face of protecting film 22 and the binding face both sides of the first adhesive phase 31 are implemented 15.9kJ/m2Sided corona treatment.Then, polaroid 10 with the face of protecting film 22 opposite side on fit the 3rd above-mentioned adhesive phase 32 (there is isolating membrane at outer surface).Before laminating, the binding face of polaroid 10 and the binding face both sides of the 3rd adhesive phase are implemented 15.9kJ/m2Sided corona treatment.
Then, after the isolating membrane of the 3rd adhesive phase 32 is peeled off removing, on the surface of the 3rd adhesive phase 32 exposed because of stripping, the above-mentioned brightness with hard conating of fitting improves film 50.Before laminating, the binding face that brightness improves film 50 implements 15.9kJ/m2Sided corona treatment.Being improved the layer of film 50 by the first adhesive phase 31/ protecting film 22/ polaroid 10/ the 3rd adhesive phase 32/ with the brightness of hard conating, to constitute the gross thickness T1 of the polarization plates 100 formed be 66 μm.
Finally, the outer surface improving the hard conating that film 50 has in brightness is fitted via second adhesive phase of above-mentioned protecting film A, obtains the polarization plates with protecting film.From the polarization plates with protecting film of gained, cut out individual body of 221mm × 139mm size, this individual body is determined amount of curl according to above-mentioned method.The results are shown in Table 1.
< embodiment 2 >
Utilize below step, produce except omitting protecting film 22 and there is the polarization plates with protecting film that the layer identical with Fig. 2 is constituted.First, in the one side of polaroid 10, use the laminating of above-mentioned water system bonding agent as the above protecting film preparing of protecting film 21.Before laminating, the binding face with polaroid 10 of protecting film 21 is implemented 15.9kJ/m2Sided corona treatment.Thereafter, at 80 DEG C so as to dry 5 minutes, 40 DEG C of ripenings 168 hours.
Then, fit in another face of polaroid 10 the first above-mentioned adhesive phase 31 (there is isolating membrane 70 at outer surface).Before laminating, the binding face of polaroid 10 and the binding face both sides of the first adhesive phase 31 are implemented 15.9kJ/m2Sided corona treatment.The gross thickness T1 being made up of the polarization plates 100 formed the layer of the first adhesive phase 31/ polaroid 10/ protecting film 21 is 40 μm.
Finally, the outer surface at protecting film 21 is fitted via second adhesive phase of said protection film A, obtains the polarization plates with protecting film.By the polarization plates with protecting film of gained and embodiment 1 identical make individual body, determine amount of curl.The results are shown in Table 1.
< embodiment 3 >
Except replacing protecting film A and use above-mentioned protecting film B, produce the polarization plates with protecting film and individual body thereof identically with embodiment 1, determine amount of curl.The results are shown in Table 1.
< comparative example 1 >
Beyond laminating protecting film, produce polarization plates and individual body thereof identically with embodiment 1, determine amount of curl.The results are shown in Table 1.
< comparative example 2 >
(1) making of polaroid
Utilize dry type stretching longitudinal direction uniaxial tension for about 5 times the polyvinyl alcohol films (average degree of polymerization about 2400,99.9 moles of more than % of saponification degree) of thick 30 μm, after keeping tense situation to impregnate 1 minute in the pure water of 60 DEG C unchangeably again, impregnate 60 seconds in the aqueous solution of weight ratio is 0.05/5/100 28 DEG C of iodine/potassium iodide/water.Thereafter, impregnate 300 seconds in the aqueous solution of weight ratio is 8.5/8.5/100 72 DEG C of potassium iodide/boric acid/water.Next, after cleaning 20 seconds with the pure water of 26 DEG C, it is dried process at 65 DEG C, obtains the polaroid that gas absorption quantity on polyvinyl alcohol film has the thickness 12 μm of iodine.
(2) with the making of the polarization plates of protecting film
Utilize below step, produce and there is the polarization plates with protecting film that the layer identical with Fig. 2 is constituted.First; the two sides of the polaroid 10 made in above-mentioned (1), uses above-mentioned water system bonding agent to fit respectively the tri acetyl cellulose membrane (buy from KonicaMinolta Co., Ltd. trade name " KC2UAW ", thick 25 μm) as protecting film 21, norbornene resin film (buy from Zeon Co., Ltd. of Japan trade name " ZEONOR ", thick 23 μm) as protecting film 22.Before laminating, the binding face with polaroid 10 of protecting film 21,22 is implemented 15.9kJ/m2Sided corona treatment.Thereafter, dry 5 minutes at 80 DEG C, 40 DEG C of ripenings 168 hours.
Then, protecting film 22 with the face of polaroid 10 opposite side on fit the first above-mentioned adhesive phase 31 (there is isolating membrane 70 at outer surface).Before laminating, the binding face of protecting film 22 and the binding face both sides of the first adhesive phase 31 are implemented 15.9kJ/m2Sided corona treatment.The gross thickness T1 being made up of the polarization plates 100 formed the layer of the first adhesive phase 31/ protecting film 22/ polaroid 10/ protecting film 21 is 80 μm.The last outer surface at protecting film 21 is fitted via second adhesive phase of above-mentioned protecting film B, obtains the polarization plates with protecting film.By the polarization plates with protecting film of gained and embodiment 1 identical make individual body, determine amount of curl.The results are shown in Table 1.
< comparative example 3 >
Utilize below step, produce the polarization plates with protecting film.First, one side laminating adhesive phase (there is isolating membrane at outer surface) of the polaroid 10 made in (1) of above-mentioned comparative example 2.This adhesive phase is identical with the 3rd above-mentioned adhesive phase.Before laminating, the binding face of adhesive phase is implemented 15.9kJ/m2Sided corona treatment.The gross thickness T1 being made up of the polarization plates 100 formed the layer of adhesive phase/polaroid 10 is 17 μm.Finally, the outer surface at polaroid 10 is fitted via second adhesive phase of above-mentioned protecting film A, obtains the polarization plates with protecting film.By the polarization plates with protecting film of gained and embodiment 1 identical make individual body, determine amount of curl.The results are shown in Table 1.
[table 1]
Claims (7)
1. with a polarization plates for protecting film,
The protecting film of the polarization plates possessing the thickness T1 comprising polaroid and the thickness T2 being laminated in one surface,
The thickness of described polaroid is less than 15 μm,
Another surface of described polarization plates is made up of the surface of the first adhesive phase,
Described protecting film is made up of the second adhesive phase being laminated in one surface and the resin molding being laminated in monolayer thereon,
Thickness ratio is in the scope that T2/T1 is 0.8～4,
The unit of described thickness T1 and described thickness T2 is μm.
2. the polarization plates with protecting film according to claim 1, wherein,
It is also equipped with being laminated in the isolating membrane on another surface of described polarization plates.
3. the polarization plates with protecting film according to claim 1, wherein,
The thickness T2 of described protecting film is more than 60 μm.
4. the polarization plates with protecting film according to claim 1, wherein,
Described polarization plates also comprises the blooming beyond described polaroid,
At protecting film described in the surface stacking of described blooming.
5. the polarization plates with protecting film according to claim 4, wherein,
Described blooming is that brightness improves film.
6. the polarization plates with protecting film according to claim 1, wherein,
Described resin molding comprises polyester based resin.
7. a duplexer, it comprises image-displaying member and is laminated in the polarization plates with protecting film according to any one of claim 1～6 thereon.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014256260 | 2014-12-18 | ||
| JP2014-256260 | 2014-12-18 | ||
| JP2015228498A JP2016118771A (en) | 2014-12-18 | 2015-11-24 | Polarizing plate with protective film and laminate including the same |
| JP2015-228498 | 2015-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105717569A true CN105717569A (en) | 2016-06-29 |
Family
ID=56147688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510940527.7A Pending CN105717569A (en) | 2014-12-18 | 2015-12-16 | Polarizing plate with protection film and laminated body comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105717569A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018017891A (en) * | 2016-07-28 | 2018-02-01 | 富士フイルム株式会社 | Liquid crystal display device |
| CN107664788A (en) * | 2016-07-29 | 2018-02-06 | 住友化学株式会社 | Optical laminate |
| CN107664787A (en) * | 2016-07-29 | 2018-02-06 | 住友化学株式会社 | Optical laminate |
| CN108363133A (en) * | 2017-01-26 | 2018-08-03 | 日东电工株式会社 | Optical laminate and image display device |
| CN109725377A (en) * | 2017-10-31 | 2019-05-07 | 住友化学株式会社 | Laminated body |
| CN110780373A (en) * | 2018-07-31 | 2020-02-11 | 住友化学株式会社 | Circular polarizing plate and display device |
| CN110780372A (en) * | 2018-07-31 | 2020-02-11 | 住友化学株式会社 | Circular polarizing plate and display device |
| CN112005138A (en) * | 2018-04-20 | 2020-11-27 | 日东电工株式会社 | Polarizing plate with retardation layer and organic EL display device |
| CN112578495A (en) * | 2019-09-27 | 2021-03-30 | 日东电工株式会社 | Optical laminate and image display device |
| CN113853538A (en) * | 2019-10-31 | 2021-12-28 | 株式会社Lg化学 | Polarizing plate laminate and method for producing same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001108830A (en) * | 1999-10-07 | 2001-04-20 | Sumitomo Chem Co Ltd | Optical film |
| CN1957274A (en) * | 2004-05-24 | 2007-05-02 | 日东电工株式会社 | Optical film with surface protection film and image display |
| JP2009237489A (en) * | 2008-03-28 | 2009-10-15 | Sumitomo Chemical Co Ltd | Method of manufacturing polarizing plate with surface treated layer |
| CN101750789A (en) * | 2008-12-08 | 2010-06-23 | 日东电工株式会社 | Method for producing optical display device and winding-up roller for producing optical display device |
| WO2014054114A1 (en) * | 2012-10-02 | 2014-04-10 | 日東電工株式会社 | Protection film and polarization plate provided with protection film |
| JP2014132313A (en) * | 2013-01-07 | 2014-07-17 | Sumitomo Chemical Co Ltd | Manufacturing method of polarizing plate, polarizing plate, laminated optical member, and image display device |
| CN104169756A (en) * | 2012-03-14 | 2014-11-26 | 日东电工株式会社 | Optical film roll |
-
2015
- 2015-12-16 CN CN201510940527.7A patent/CN105717569A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001108830A (en) * | 1999-10-07 | 2001-04-20 | Sumitomo Chem Co Ltd | Optical film |
| CN1957274A (en) * | 2004-05-24 | 2007-05-02 | 日东电工株式会社 | Optical film with surface protection film and image display |
| JP2009237489A (en) * | 2008-03-28 | 2009-10-15 | Sumitomo Chemical Co Ltd | Method of manufacturing polarizing plate with surface treated layer |
| CN101750789A (en) * | 2008-12-08 | 2010-06-23 | 日东电工株式会社 | Method for producing optical display device and winding-up roller for producing optical display device |
| CN104169756A (en) * | 2012-03-14 | 2014-11-26 | 日东电工株式会社 | Optical film roll |
| WO2014054114A1 (en) * | 2012-10-02 | 2014-04-10 | 日東電工株式会社 | Protection film and polarization plate provided with protection film |
| JP2014132313A (en) * | 2013-01-07 | 2014-07-17 | Sumitomo Chemical Co Ltd | Manufacturing method of polarizing plate, polarizing plate, laminated optical member, and image display device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018017891A (en) * | 2016-07-28 | 2018-02-01 | 富士フイルム株式会社 | Liquid crystal display device |
| CN107664788A (en) * | 2016-07-29 | 2018-02-06 | 住友化学株式会社 | Optical laminate |
| CN107664787A (en) * | 2016-07-29 | 2018-02-06 | 住友化学株式会社 | Optical laminate |
| CN108363133A (en) * | 2017-01-26 | 2018-08-03 | 日东电工株式会社 | Optical laminate and image display device |
| CN108363133B (en) * | 2017-01-26 | 2022-07-05 | 日东电工株式会社 | Optical laminate and image display device |
| CN109725377A (en) * | 2017-10-31 | 2019-05-07 | 住友化学株式会社 | Laminated body |
| CN112005138A (en) * | 2018-04-20 | 2020-11-27 | 日东电工株式会社 | Polarizing plate with retardation layer and organic EL display device |
| CN112041711A (en) * | 2018-04-20 | 2020-12-04 | 日东电工株式会社 | Polarizing plate with retardation layer and organic EL display device |
| CN110780373A (en) * | 2018-07-31 | 2020-02-11 | 住友化学株式会社 | Circular polarizing plate and display device |
| CN110780372A (en) * | 2018-07-31 | 2020-02-11 | 住友化学株式会社 | Circular polarizing plate and display device |
| CN112578495A (en) * | 2019-09-27 | 2021-03-30 | 日东电工株式会社 | Optical laminate and image display device |
| CN113853538A (en) * | 2019-10-31 | 2021-12-28 | 株式会社Lg化学 | Polarizing plate laminate and method for producing same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105717569A (en) | Polarizing plate with protection film and laminated body comprising same | |
| CN105717572A (en) | Polarizing plate with protective film and laminate comprising the same | |
| JP6258911B2 (en) | Polarizing plate with protective film and laminate including the same | |
| KR20190085900A (en) | Polarizing plate with protective film and laminate comprising the same | |
| CN104122614B (en) | Polarizing coating and its manufacture method, optical film and image display device | |
| TWI783087B (en) | Optical laminate and production method therefor | |
| CN105717571A (en) | Polarizing film, manufacturing method thereof, polarizing film set, liquid crystal display panel and liquid crystal display device | |
| JP6219781B2 (en) | Polarizing film, polarizing plate and liquid crystal panel | |
| CN106415339B (en) | Optical laminate and image display device | |
| CN108693589A (en) | Polarization plates with protecting film and liquid crystal display panel | |
| CN206804912U (en) | Polarization plates and liquid crystal display device | |
| CN108474891A (en) | Polarization plates | |
| TWI686629B (en) | Polarizing plate and method for producing the same | |
| CN105467492A (en) | Polarizing plate | |
| TW201626000A (en) | Polarizing plate and method for producing the same, and polarizing plate set, liquid crystal panel, liquid crystal display device | |
| CN109313301A (en) | Polarization plates component | |
| JP2017003954A (en) | Polarizing film and polarizing plate including the same | |
| CN109725377A (en) | Laminated body | |
| CN105842903A (en) | Polarizing plate, liquid crystal panel and liquid crystal display device | |
| CN107526206A (en) | Polarize board component | |
| CN108693588A (en) | Polarization plates with protecting film and optical laminate | |
| CN110275235A (en) | The manufacturing method of optical laminate with adhesive layer | |
| KR20160150026A (en) | Method for producing polarizing plate with protective film | |
| CN108020950A (en) | Polarization plates group and liquid crystal panel | |
| TWI809198B (en) | Liquid crystal layer laminate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160629 |
|
| RJ01 | Rejection of invention patent application after publication |