CN110446953A - Polarizer and image display device - Google Patents
Polarizer and image display device Download PDFInfo
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- CN110446953A CN110446953A CN201880017823.1A CN201880017823A CN110446953A CN 110446953 A CN110446953 A CN 110446953A CN 201880017823 A CN201880017823 A CN 201880017823A CN 110446953 A CN110446953 A CN 110446953A
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- protective film
- polarizer
- film
- core
- resin
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Abstract
The present invention provides through the polarizers that easy composition inhibits the damage on surface.Polarizer has；Polarisation part and be configured at polarisation part at least side protective film, protective film includes: acrylic resin, the core-shell particle for being scattered in acrylic resin, and the arithmetic average roughness Ra on the surface of protective film is 6.0 μm or more.
Description
Technical field
The present invention relates to polarizer and image display devices.
Background technique
For image display device (for example, liquid crystal display device, organic EL display device), due to its image side of being formed
Formula is configured with polarizer in at least side of display unit in most cases.Common polarizer has polarisation part and is configured at
The unilateral side of polarisation part or the protective film of two sides.In recent years, for the purpose for improving durability, use is proposed by containing crosslinking
The protective film (patent document 1) that (methyl) acrylic resin film of elastomer is formed.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2016-218478 bulletin
Summary of the invention
Problems to be solved by the invention
In recent years, with an urgent demand of the slimming of image display device, need to constitute each of image display device
Optical component configures with amplexiforming.As a result, polarizer is contacted with optical components such as the diffusion sheets of adjacent configuration, thus in polarizer
Protective film on can generate damage.For such a problem, it proposes in the past, by forming hard conating on the surface of polarizer
Or diffusion layer inhibits the damage of protective film.But in these methods exist because manufacturing process increase due to productivity can reduce,
The problem of Expenses Cost.
The present invention is made to solve the problems, such as above-mentioned existing, its main purpose is, providing by easy
It constitutes the polarizer for the damage for inhibiting surface and has the image display device of above-mentioned polarizer.
The solution to the problem
Polarizer of the invention includes polarisation part and is configured at the protective film of at least side of above-mentioned polarisation part, protection
Film includes: acrylic resin and the core-shell particle for being scattered in the acrylic resin, the arithmetic on the surface of protective film
Average roughness Ra is 6.0nm or more.
In 1 embodiment, above-mentioned acrylic resin has selected from by glutarimide unit, lactone ring element, horse
Come at least 1 in the group of anhydride unit, maleimide amine unit and glutaric anhydride unit composition.
In 1 embodiment, it is formed on the surface for being in opposite side with above-mentioned polarisation part of protective film by above-mentioned core
Bumps caused by core-shell particles.
In 1 embodiment, above-mentioned protective film contains above-mentioned nucleocapsid relative to above-mentioned 100 parts by weight of acrylic resin
3 parts by weight of type particle~50 parts by weight.
In 1 embodiment, above-mentioned core-shell particle includes the core being made of rubber-like polymer and by glassy poly-
Close the coating for covering the core that object is constituted.
In 1 embodiment, above-mentioned protective film is biaxially oriented film.
In 1 embodiment, do not have diffusion layer on the surface of above-mentioned protective film.
According to another aspect of the present invention, image display device is provided.The image display device successively has: display is single
First, above-mentioned polarizer, diffusion sheet and light source, the above-mentioned protective film of above-mentioned polarizer is in the mode opposite with above-mentioned diffusion sheet
Configuration.
The effect of invention
According to the present invention, it is possible to provide by easily constituting the polarizer for the damage for inhibiting surface and having above-mentioned polarisation
The image display device of plate.
Detailed description of the invention
Fig. 1 is the sectional view of the polarizer of 1 embodiment of the invention.
Fig. 2 is the sectional view of the polarizer of another embodiment of the invention.
Specific embodiment
Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to these embodiments.
A. the overall structure of polarizer
Fig. 1 is the sectional view of the polarizer of 1 embodiment of the invention.Polarizer 10 includes polarisation part 1 and configuration
Protective film 2 in the side of polarisation part 1.Protective film 2 includes: acrylic resin and being scattered in acrylic resin
Core-shell particle.The arithmetic average roughness Ra on the surface of protective film 2 is 6.0nm or more.It is preferred that protective film 2 with it is inclined
The surface that light part 1 is in opposite side is formed with the bumps as caused by core-shell particle.Protective film 2 is preferably with respect to acrylic acid series
100 parts by weight of resin contain 3 parts by weight of core-shell particle~50 parts by weight.Representative core-shell particle is included by rubber
The coating of core and the covering core being made of glassy polymers that shaped polymer is constituted.Protective film 2 is preferably biaxial stretch-formed
Film.In 1 embodiment, polarizer 10 does not have diffusion layer on the surface of protective film 2.Polarizer of the invention is for example
Make in the case where being assembled in image display device and being contacted with other optical components such as diffusion sheet, can also inhibit by with it is above-mentioned its
The generation damaged caused by his optical component friction.
Fig. 2 is the sectional view of the polarizer of another embodiment of the invention.Polarizer 11 includes polarisation part 1, is configured at
The protective film 2 (the 1st protective film) of the side of polarisation part 1 and be configured at polarisation part 1 the other side the 2nd protective film 3.
2nd protective film 3 can be the film formed by material identical with the 1st protective film 2, or be formed by other materials
Film.Polarizer 11 can have any suitable optical functional film to replace the 2nd protective film according to purpose and purposes
3。
Polarizer 10 and polarizer 11 can be sheet or strip.In addition, polarizer 10 can be in polarisation part
1 surface has adhesive phase (not shown), and polarizer 11 can have adhesive phase (not scheme on the surface of the 2nd protective film 3
Show).
B. polarisation part
As polarisation part, any suitable polarisation part can be used.For example, the resin film for forming polarisation part can be single
The resin film of layer, or two layers or more of laminated body.
As the concrete example for the polarisation part being made of the resin film of single layer, it is thin for can enumerating to polyvinyl alcohol (PVA)
Film, part acetalation PVA system film, ethylene vinyl acetate copolymer pastern divide the hydrophilic macromolecules film such as saponified film
Implement dyeing processing and stretch processing based on dichroic substances such as iodine, dichroic dyes and winner, the dehydration of PVA
The polyenes such as dehydrochlorinated products of object, polyvinyl chloride system oriented film etc..Preferably, from optical characteristics it is excellent in terms of go out
Hair, uses polarisation part obtained from PVA system film is dyed and is uniaxially stretched with iodine.
It is above-mentioned based on the dyeing of iodine for example by being carried out in iodine aqueous solution by PVA system is thin film dipped.It is above-mentioned to be uniaxially stretched
Stretching ratio be preferably 3~7 times.Stretching can carry out after dyeing processing, can also be carried out with Edge Coloring side.Furthermore it is possible to
It is dyed after stretching.As needed, swelling treatment, crosslinking Treatment, cleaning treatment, drying process etc. are implemented to PVA system film.
For example, being washed in water by before dyeing by PVA system is thin film dipped, the dirt of PVA system film surface can not only be cleaned
Mark, antiblocking agent, additionally it is possible to make PVA system films swell and prevent from dyeing unequal.
As the concrete example for using polarisation part obtained from laminated body, it can enumerate using resin base material and be laminated in the tree
The laminated body or resin base material of the PVA resin (PVA based resin film) of aliphatic radical material and coating are formed in the resin base material
PVA resin laminated body obtained from polarisation part.The PVA system of the resin base material is formed in using resin base material and coating
Polarisation part obtained from the laminated body of resin layer for example can be such as production of getting off: PVA system resin solution is coated on resin base material,
It makes it dry to form PVA resin on resin base material, obtains the laminated body of resin base material Yu PVA resin；It is right
The laminated body is stretched and is dyed, and polarisation part is made in PVA resin.In present embodiment, stretching representative is packet
It includes and laminated body is impregnated in boric acid aqueous solution and is stretched.In turn, it can further include water-soluble in boric acid for stretching as needed
Laminated body is stretched in the air under high temperature (such as 95 DEG C or more) before stretching in liquid.Obtained resin base material/polarisation
The laminated body of part can directly use (i.e., it is possible to using resin base material as the protective layer of polarisation part), can also from resin base material/
The laminated body of polarisation part removes resin base material, meets any suitable protective layer of purpose in release surface stacking and uses.
The details of the manufacturing method of such polarisation part is for example recorded in Japanese Unexamined Patent Publication 2012-73580 bulletin.The bulletin its
Whole record is used as reference to be cited in this specification.
The thickness of polarisation part is, for example, 1 μm~80 μm.In 1 embodiment, the thickness of polarisation part is preferably 1 μm~15 μ
It m, is more preferably 3 μm~10 μm, particularly preferably 3 μm~8 μm.
C. protective film
C-1. the characteristic of protective film
Protective film includes acrylic resin and the core-shell particle for being scattered in acrylic resin, protection as described above
The arithmetic average roughness Ra on the surface of film is 6.0nm or more.Above-mentioned arithmetic average roughness Ra be preferably 6nm~50nm,
More preferably 6nm~40nm.By the value in range that arithmetic average roughness Ra is set as to above-mentioned, it is able to suppress protective film
The sliding property on surface becomes excessively high, as a result, batching offset when can inhibit protective film (and polarizer) strip.It is above-mentioned
Arithmetic average roughness Ra can content, the manufacturing method of aftermentioned protective film by the core-shell particle in protective film
In stretching condition etc. adjust to expectation.The thickness of protective film is preferably 5 μm~150 μm, more preferably 10 μ
M~100 μm.
Protective film preferably substantially optically has isotropism.In this specification, " substantially optically have
Isotropism " refer to phase difference Re (550) is 0nm~10nm in face, the phase difference Rth (550) of thickness direction be -10nm~+
10nm.In face phase difference Re (550) be more preferably 0nm~5nm, further preferably 0nm~3nm, particularly preferably 0nm~
2nm.The phase difference Rth (550) of thickness direction is more preferably -5nm~+5nm, is more preferably -3nm~+3nm, especially excellent
It is selected as -2nm~+2nm.When the Re (550) and Rth (550) of protective film are such range, it can prevent polarizer application
To the adverse effect of display characteristic when image display device.It should be noted that Re (550) is at 23 DEG C with wavelength
Phase difference in the face of the film of the light measurement of 550nm.Re (550) passes through formula: Re (550)=(nx-ny) × d is found out.Rth
It (550) is at 23 DEG C with the phase difference of the thickness direction of the film of the light measurement of wavelength 550nm.Rth (550) passes through formula: Rth
(550)=(nx-nz) × d is found out.Herein, nx is the refraction that the refractive index in face is maximum direction (that is, slow-axis direction)
Rate, ny are the refractive index in direction (that is, fast axis direction) orthogonal with slow axis in face, and nz is the refractive index of thickness direction, and d is thin
The thickness (nm) of film.
The the light transmittance of 380nm at 80 μm of the thickness of protective film the high the more preferred.Specifically, light transmittance is preferably
85% or more, it is more preferably 88% or more, further preferably 90% or more.When light transmittance is such range, it can be ensured that
The desired transparency.Light transmittance for example can be by being measured based on the method for ASTM-D-1003.
The the mist degree of protective film the low the more preferred.Specifically, mist degree is preferably 5% or less, more preferably 3% or less,
Further preferably 1.5% or less, it is particularly preferably 1% or less.If mist degree be 5% hereinafter, if film can be assigned it is good
Clear (clear) sense.It in turn, also can be good even if in the case where the visible side polarizer for image display device
See display content in ground.
YI at 80 μm of the thickness of protective film is preferably 1.27 or less, is more preferably 1.25 or less, is more preferably
1.23 or less, 1.20 or less are particularly preferably.If YI is more than 1.3, optical transparence becomes insufficient sometimes.It needs to illustrate
It is that YI for example can be according to by using high speed integrating sphere type spectrophotometric transmittance analyzer (trade name DOT-3C: color in village
Technical research is made) the obtained color of measurement tristimulus values (X, Y, Z), found out by following formula.
YI=[(1.28X-1.06Z)/Y] × 100
B value (scales of the form and aspect of the colorimetric system based on Hunter) at 80 μm of the thickness of protective film is preferably less than
1.5,1.0 or less are more preferably.In the case that b value is 1.5 or more, it sometimes appear that undesirable tone.It should be noted that
B value can for example be obtained as got off: protective film sample being cut into 3cm square, uses high speed integrating sphere type spectrophotometric transmittance
Analyzer (trade name DOT-3C: color technical research institute system in village) measures form and aspect, based on the colorimetric system of Hunter to the color
Mutually evaluated.
The moisture permeability of protective film is preferably 300g/m2R or less, more preferably 250g/m for 24 hours2For 24 hours r or less, into one
Step is preferably 200g/m2R or less, particularly preferably 150g/m for 24 hours2R or less, most preferably 100g/m for 24 hours2For 24 hours r with
Under.When the moisture permeability of protective film is such range, durability and the excellent polarizer of moisture-proof can be obtained.
The tensile strength of protective film be preferably 10MPa or more and less than 100MPa, more preferably 30MPa or more and deficiency
100MPa.In the case where less than 10MPa, sufficient mechanical strength cannot be shown sometimes.If having processability more than 100MPa
The worry become inadequate.Tensile strength can for example be measured based on ASTM-D-882-61T.
The tensile elongation of protective film is preferably 1.0% or more, is more preferably 3.0% or more, is more preferably
5.0% or more.The upper limit of tensile elongation is, for example, 100%.In the case that tensile elongation is less than 1%, toughness becomes sometimes
It is insufficient.Tensile elongation can for example be measured based on ASTM-D-882-61T.
The tensile modulus of elasticity of protective film is preferably 0.5GPa or more, more preferably 1GPa or more, is more preferably
2GPa or more.The upper limit of tensile modulus of elasticity is, for example, 20GPa.In the case that tensile modulus of elasticity is less than 0.5GPa, sometimes not
It can show sufficient mechanical strength.Tensile modulus of elasticity can for example be measured based on ASTM-D-882-61T.
Protective film may include any suitable additive according to purpose.As the concrete example of additive, can enumerate
Ultraviolet absorbing agent；The antioxidants such as hindered phenolic, phosphorus system, sulphur system；Resistance to light stabilizer, weathering stabilizers, heat stabilizer etc. are steady
Determine agent；The reinforcing materials such as glass fibre, carbon fiber；Near infrared ray absorption；Three (dibromopropyl) phosphates, triallyl phosphoric acid
The fire retardants such as ester, sb oxide；The antistatic agents such as the surfactant of anionic system, cationic system, nonionic system；Inorganic face
The colorants such as material, organic pigment, dyestuff；Organic filler or inorganic filler；Modifier；Organic filler, inorganic filler；
Plasticizer；Lubricant；Deng.Additive can be added in the polymerization of acrylic resin, can also be added in film formation.
Type, quantity, combination, additive amount of additive etc. can suitably be set according to purpose.
In 1 embodiment, the 2nd protective film can be formed by material identical with the 1st protective film.Another embodiment party
In formula, the 2nd protective film can be formed by the material different from the 1st protective film.2nd protective film by with the 1st protective film
In the case that different materials is formed, as the forming material of the 2nd protective film, for example, can enumerate without containing hud typed
Cellulose-based resins, cyclic olefine resin, the polypropylene such as acrylic resin, cellulose diacetate, the Triafol T of grain
Etc. esters system resin, polyamide resin, the polycarbonate-based tree such as olefin-based resins, PET series resin
Rouge, their copolymer resin etc..The thickness of 2nd protective film is preferably 10 μm~100 μm.
C-2. acrylic resin
C-2-1. the composition of acrylic resin
As acrylic resin, any suitable acrylic resin can be used.For acrylic resin, represent
Property, as monomeric unit, contain (methyl) alkyl acrylate as principal component.In this specification, " (methyl) propylene
Acid " refers to acrylic acid and/or methacrylic acid.(methyl) acrylic acid alkyl as the main framing for constituting acrylic resin
Ester may be exemplified out (methyl) alkyl acrylate that the carbon number of the alkyl of straight-chain or branched is 1~18.They can be single
Solely uses or be applied in combination.In turn, any suitable comonomer can be imported into acrylic resin by copolymerization.This
Type, quantity, copolymerization ratio of the comonomer of sample etc. can suitably be set according to purpose.For the master of acrylic resin
The constituent (monomeric unit) of skeleton, is described below referring to general formula (2).
Acrylic resin preferably has selected from glutarimide unit, lactone ring element, maleic anhydride units, Malaysia acyl
At least 1 in imines unit and glutaric anhydride unit.Acrylic resin with lactone ring element is for example recorded in Japan
In special open 2008-181078 bulletin, the record of the bulletin is used as reference to be cited into this specification.Glutarimide unit
It is preferred that indicated by the following general formula (1),
In general formula (1), R1And R2Each independently represent the alkyl of hydrogen atom or carbon number 1~8, R3Indicate hydrogen atom, carbon number
The aryl of 1~18 alkyl, the naphthenic base of carbon number 3~12 or carbon number 6~10.In general formula (1), preferably R1And R2Each independently
For hydrogen atom or methyl, R3For hydrogen atom, methyl, butyl or cyclohexyl.More preferable R1For methyl, R2For hydrogen atom, R3For first
Base.
Representative above-mentioned (methyl) alkyl acrylate is indicated by the following general formula (2),
In general formula (2), R4Indicate hydrogen atom or methyl, R5Indicate the rouge of hydrogen atom or optionally substituted carbon number 1~6
Fat race or alicyclic type hydrocarbon.As substituent group, for example, halogen, hydroxyl can be enumerated.Tool as (methyl) alkyl acrylate
Body example can enumerate (methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) n-propyl, (methyl) propylene
Sour N-butyl, (methyl) tert-butyl acrylate, (methyl) the just own ester of acrylic acid, (methyl) cyclohexyl acrylate, (methyl) propylene
Sour chloromethyl ester, (methyl) acrylic acid 2- chloroethene ester, (methyl) acrylic acid 2- hydroxy methacrylate, (methyl) acrylic acid 3- hydroxy propyl ester,
The own ester of (methyl) acrylic acid 2,3,4,5,6- penta hydroxy group and (methyl) acrylic acid 2,3,4,5- tetrahydroxy pentyl ester.In general formula (2), R5
Preferably hydrogen atom or methyl.It is therefore especially preferred that (methyl) alkyl acrylate be methyl acrylate or methacrylic acid
Methyl esters.
Above-mentioned acrylic resin can only include single glutarimide unit, also may include above-mentioned general formula (1)
In R1、R2And R3Different multiple glutarimide units.
The content ratio of glutarimide unit in above-mentioned acrylic resin be preferably 2 moles of %~50 mole %,
More preferably 2 moles of %~45 mole %, further preferably 2 moles of %~40 mole %, particularly preferably 2 moles of %~35
It mole %, is most preferably 3 moles of %~30 mole %.When than 2 moles % of content ratio are few, have from glutarimide unit and
The effect (for example, high optical characteristics, the excellent cementability of high mechanical strength and polarisation part, slimming) shown is no
The worry that can be given full play to.If content ratio is more than 50 moles of %, there is the worry that for example heat resistance, hyalinosis are insufficient.
Above-mentioned acrylic resin can only include single (methyl) acrylate unit, also may include above-mentioned
R in general formula (2)4And R5Different a variety of (methyl) acrylate units.
The content ratio of (methyl) acrylate unit in above-mentioned acrylic resin be preferably 50 moles of %~
98 moles of %, more preferably 55 moles of %~98 mole %, further preferably 60 moles of %~98 mole %, it is particularly preferably
It 65 moles of %~98 mole %, is most preferably 70 moles of %~97 mole %.When than 50 moles % of content ratio are few, it is originated from
(methyl) acrylate unit and the effect (for example, high heat resistance, the high transparency) shown will not give full play to
Worry.When more than than 98 moles % of above-mentioned content ratio, there is resin brittle and susceptible to cracking, high machinery cannot be given full play to by force
The worry of degree, producing rate variance.
Above-mentioned acrylic resin may include in addition to glutarimide unit and (methyl) acrylate unit
Unit.
In 1 embodiment, acrylic resin can contain the insatiable hunger for being not involved in aftermentioned intramolecular imidization reaction
With carboxylic acid such as 0~10 weight %.The content ratio of unsaturated carboxylic acid unit is preferably 0~5 weight %, more preferably 0
~1 weight %.When content is such range, it is able to maintain that the transparency, is detained stability and moisture-proof.
In 1 embodiment, acrylic resin can contain copolymerizable vinyl monomer unit other than the above
(other vinyl monomer units).As other vinyl monomers, for example, acrylonitrile, methacrylonitrile, second can be enumerated
Base acrylonitrile, allyl glycidyl ether, maleic anhydride, itaconic anhydride, N- methylmaleimido, N- ethyl maleimide
Amine, N- N-cyclohexylmaleimide, acrylate, acrylic acid propylcarbamic ethyl ester, dimethylamine
Ethyl ester, methacrylic acid ethylamino propyl ester, methacrylic acid Cyclohexylamino ethyl ester, N- vinyl diethylamide, N- acetyl
Base vinyl amine, allyl amine, methacrylic amine, N- methacrylic amine, 2- isopropenyl oxazoline, 2- vinyl oxazole
Quinoline, 2- acryloyl group oxazoline, N-phenylmaleimide, methacrylic acid phenyl amino ethyl ester, styrene, Alpha-Methyl benzene second
Alkene, to glycidyl styrene, p-aminophenyl ethylene, 2- styryl oxazoline etc..These can be used alone, can also be with
It is applied in combination.The preferably styrenic monomers such as styrene, α-methylstyrene.Other vinyl monomer units containing than
Example is preferably 0~1 weight %, more preferably 0~0.1 weight %.When for such range, it is able to suppress undesirable phase difference
Show and the transparency reduction.
Acid imide rate in above-mentioned acrylic resin is preferably 2.5%~20.0%.Acid imide rate is such
When range, heat resistance, the transparency and the excellent resin of shaping processability, the production of fouling when can prevent film shaped can be obtained
Raw, mechanical strength reduction.For above-mentioned acrylic resin, acid imide rate is by glutarimide unit and (methyl) propylene
The ratio of acid alkyl ester unit indicates.The ratio can such as be obtained according to the H NMR spectroscopy of acrylic resin, IR spectrum.This implementation
In mode, acid imide rate can be by using1HNMRBRUKER AvanceIII (400MHz) passes through resin1H-NMR measurement
To find out.More specifically, by the O-CH from (methyl) alkyl acrylate near 3.5~3.8ppm3The peak face of proton
Product is set as A, by the N-CH from glutarimide near 3.0~3.3ppm3The area at the peak of proton is set as B, passes through following formula
To find out.
Acid imide rate Im (%)={ B/ (A+B) } × 100
The acid value of above-mentioned acrylic resin is preferably 0.10mmol/g~0.50mmol/g.Acid value is such range
When, the resin of the balancing good of heat resistance, mechanical properties and shaping processability can be obtained.If acid value is too small, produce sometimes
Life is as using increased costs caused by the modifying agent for being adjusted to desired acid value, the gel as caused by the remaining of modifying agent
The problems such as generation of shape object.If acid value is excessive, there is foaming when easily causing film shaped (for example, when melting extrusion), at
The tendency that the productivity of shape product reduces.For above-mentioned acrylic resin, acid value is the carboxylic acid in the acrylic resin
And the content of carboxylic acid anhydrides unit.In present embodiment, acid value can for example pass through WO2005/054311 or Japanese Unexamined Patent Publication 2005-
The titration recorded in No. 23272 bulletins calculates.
The weight average molecular weight of above-mentioned acrylic resin is preferably 1000~2000000, more preferably 5000~
1000000, be more preferably 10000~500000, particularly preferably 50000~500000, be most preferably 60000~
150000.Gel permeation chromatography (GPC system, TOSOH Co., Ltd's system) can be used for example, by polyphenyl second in weight average molecular weight
Alkene converts to find out.It should be noted that tetrahydrofuran can be used as solvent.
The Tg (glass transition temperature) of above-mentioned acrylic resin is preferably 110 DEG C or more, more preferably 115 DEG C with
Above, further preferably 120 DEG C or more, particularly preferably 125 DEG C or more, most preferably 130 DEG C or more.Tg is 110 DEG C or more
When, the durability of the polarizer comprising the protective film obtained by such resin is easy to become excellent.The upper limit value of Tg is preferred
For 300 DEG C or less, more preferably 290 DEG C or less, further preferably 285 DEG C or less, be particularly preferably 200 DEG C or less, it is optimal
It is selected as 160 DEG C or less.When Tg is such range, have excellent formability.
C-2-2. the polymerization of acrylic resin
Above-mentioned acrylic resin can for example be manufactured by the following method.This method comprises: (I) makes and general formula
(2) corresponding (methyl) alkyl acrylate monomer of (methyl) acrylate unit and unsaturated carboxylic acid monomer shown in
And/or the copolymerization of its precursor monomer obtains copolymer (a)；And (II) is handled the copolymer (a) with acid imide agent, by
This carries out (methyl) alkyl acrylate monomer units and unsaturated carboxylic acid monomer and/or its precursor list in the copolymer (a)
Glutarimide unit shown in general formula (1) is imported into copolymer by the intramolecular imidization reaction of body unit.
As unsaturated carboxylic acid monomer, for example, acrylic acid, methacrylic acid, crotonic acid, alpha-substituted propylene can be enumerated
Acid, alpha-substituted methacrylic acid.As its precursor monomer, for example, acrylamide, Methacrylamide etc. can be enumerated.These
It may be used alone, can also be used in combination.Before preferred unsaturated carboxylic acid monomer is acrylic or methacrylic acid, is preferred
Body monomer is acrylamide.
As the method handled with acid imide agent copolymer (a), any suitable method can be used.As
Concrete example can enumerate the method using extruder, using the method for intermittent reaction slot (pressure vessel).Use extruder
Method includes being handled by copolymer (a) heating melting, by it with acid imide agent using extruder.In this case, conduct
Any suitable extruder can be used in extruder.As concrete example, can enumerate single screw extrusion machine, double screw extruder,
Multi-screw extruder.Method for using intermittent reaction slot (pressure vessel) can be used any suitable intermittent anti-
Answer slot (pressure vessel).
As acid imide agent, as long as glutarimide unit shown in above-mentioned general formula (1) can be generated, so that it may use
Any suitable compound.As the concrete example of acid imide agent, methylamine, ethamine, n-propylamine, isopropylamine, positive fourth can be enumerated
Amine, aniline, benzylamine, toluidines, trichloroaniline of fatty race's alkyl such as amine, isobutyl amine, tert-butylamine, n-hexylamine etc. contain aromatic series
The amine containing alicyclic type hydrocarbon such as amine, cyclohexylamine of alkyl.In turn, also can be used for example can generate such amine by heating
Urea based compound.As carbamide compound, for example, urea, 1,3- dimethyl urea, 1,3- diethyl urea, 1,3- dipropyl can be enumerated
Urea.Acid imide agent is preferably methylamine, ammonia, cyclo-hexylamine, more preferably methylamine.
Closed loop promotor can also be added as needed other than adding above-mentioned acid imide agent for imidizate.
The dosage of acid imide agent in imidizate relative to 100 parts by weight of copolymer (a) be preferably 0.5 parts by weight~
10 parts by weight, more preferably 0.5 parts by weight~6 parts by weight.If 0.5 parts by weight of amount ratio of acid imide agent are few, sometimes not
Desired acid imide rate can be reached.As a result, the heat resistance of the resin obtained sometimes becomes extremely insufficient, forming can be induced
The open defects such as fouling afterwards.If the dosage of acid imide agent is more than 10 parts by weight, acid imide agent can remain in tree sometimes
In rouge, the open defects such as the fouling after shape, foaming can be induced by the acid imide agent.
The manufacturing method of present embodiment can also include as needed being based on esterifying agent other than above-mentioned imidizate
Processing.
As esterifying agent, for example, dimethyl carbonate, 2,2-dimethoxypropane, dimethyl sulfoxide, orthoformic acid can be enumerated
Triethyl, trimethyl orthoacetate, trimethyl orthoformate, diphenyl carbonate, dimethyl suflfate, methyl tosylate, methyl trifluoro
Methane sulfonate, methyl acetate, methanol, ethyl alcohol, methyl isocyanate, parachlorobenzyl isocyanic ester, dimethyl carbodiimide, diformazan
Base tertiary butyl chloride silane, isopropyl acetate alkenyl esters, dimethyl urea, tetramethylammonium hydroxide, dimethyl diethoxysilane, four-
N- butoxy silane, dimethyl (trimethyl silane) phosphite ester, Trimethyl phosphite, trimethyl phosphate, tricresyl phosphate,
Diazomethane, ethylene oxide, propylene oxide, cyclohexene oxide, 2- hexyl glycidyl ether, phenyl glycidyl ether, benzyl
Base glycidol ether.In these, from the viewpoints such as cost and reactivity, preferably dimethyl carbonate.
The additive amount of esterifying agent can be set in such a way that the acid value of acrylic resin becomes desired value.
C-2-3. other resins are applied in combination
In embodiments of the present invention, above-mentioned acrylic resin and other resin combinations can be used.I.e., it is possible to make
It constitutes the monomer component of acrylic resin and constitutes the monomer component copolymerization of other resins, by the copolymer for later in D
The film described in is formed；The blend of acrylic resin and other resins can also be formed for film.As it
His resin, for example, can enumerate phenylethylene resin series, polyethylene, polypropylene, polyamide, polyphenylene sulfide, polyether-ether-ketone, polyester,
Other thermoplastic resins such as polysulfones, polyphenylene oxide (polyphenylene oxide), polyacetals, polyimides, polyetherimide,
The heat-curing resins such as phenol resin, melamine series resin, polyester based resin, organic silicon-type resin, epoxy system resin.Combination
The type and compounding amount of the resin used can suitably be set according to purpose and the desired characteristic of obtained film etc..Example
Such as, phenylethylene resin series (preferably acrylonitritrile-styrene resin) can be applied in combination as retardation controlling agent.
In the case where acrylic resin and other resins are applied in combination, the blend of acrylic resin and other resins
In acrylic resin content be preferably 50 weight of weight %~100 %, more preferably 60 weight of weight %~100 %,
Further preferably 70 weight of weight %~100 %, particularly preferably 80 weight of weight %~100 %.Content is less than 50 weights
In the case where measuring %, there is the worry of the high-fire resistance, high transparency that cannot sufficiently reflect acrylic resin inherently.
C-3. core-shell particle
In above-mentioned protective film, core-shell particle relative to 100 parts by weight of acrylic resin be preferably compounded 3 parts by weight~
50 parts by weight, more preferable 3 parts by weight~40 parts by weight.It as a result, can be by the arithmetic average roughness Ra tune on the surface of protective film
Whole is in the range of it is expected.Core-shell particle can expose the table in protective film on the surface of protective film by a part
Face forms bumps, can not also the surface of protective film expose (state to be covered by acrylic resin) protect it is thin
The surface of film forms bumps.
Representative core-shell particle is made of with the core being made of rubber-like polymer and glassy polymers
Cover the coating of the core.Core-shell particle can have layer that 1 layer or more is made of glassy polymers as innermost layer or
Middle layer.
The Tg for constituting the rubber-like polymer of core is preferably 20 DEG C or less, is more preferably -60 DEG C~20 DEG C, is further preferred
It is -60 DEG C~10 DEG C.If the Tg for constituting the rubber-like polymer of core is more than 20 DEG C, there is the mechanical strength of acrylic resin
Improve insufficient worry.Constitute coating glassy polymers (rigid polymer) Tg be preferably 50 DEG C or more, it is more excellent
It is selected as 50 DEG C~140 DEG C, further preferably 60 DEG C~130 DEG C.If the Tg for constituting the glassy polymers of coating is lower than 50
DEG C, then the worry for thering is the heat resistance of acrylic resin to reduce.
The content ratio of core in core-shell particle be preferably 30 weight of weight %~95 %, more preferably 50 weight %~
90 weight %.The ratio of glassy polymeric nitride layer in core is 0~60 weight % relative to the 100 weight % of total amount of core, preferably
For 0~45 weight %, more preferably 10 weight of weight %~40 %.The content ratio of coating in core-shell particle is preferably
5 weight of weight %~70 %, more preferably 10 weight of weight %~50 %.
In 1 embodiment, the core-shell particle being scattered in acrylic resin can have flat pattern.It is hud typed
Particle can carry out flattening by the stretching described in C-4 below.Carried out the length of the core-shell particle of flattening/
The ratio of thickness is 7.0 or less.The ratio of length/thickness is preferably 6.5 or less, more preferably 6.3 or less.On the other hand, length/thickness
The ratio of degree is preferably 4.0 or more, more preferably 4.5 or more, further preferably 5.0 or more.In this specification, " length/thickness
Ratio " refer to core-shell particle plan view shape representative length and thickness ratio.Herein, it for " representing length ", overlooks
Shape be refer to diameter in circular situation, be ellipse in the case where refer to major diameter, be rectangle or polygon in the case where be
Refer to cornerwise length.This for example, by following step than that can find out.With transmission electron microscope (for example, accelerating
Voltage 80kV, RuO4Dyeing ultrathin sectioning) obtained film sections are shot, from the nucleocapsid being present in gained photo
Long particle (obtaining the particle close to the section for representing length) rises in type particle successively extracts 30 out, calculates that (length is averaged
Value)/(average value of thickness), this makes it possible to obtain the ratios.
About the core for constituting core-shell particle rubber-like polymer, constituting the glassy polymers of coating, (hard is poly-
Close object), their polymerization and other details constituted, such as be recorded in Japanese Unexamined Patent Publication 2016-33552 bulletin
In.The record of the bulletin is used as reference to be cited into this specification.
C-4. the formation of protective film
The protective film of embodiments of the present invention is representative be will be able to include above-mentioned acrylic acid series tree by including
The composition of rouge (in the case where other resins are applied in combination, for the blend with other resins) and core-shell particle forms thin
The method of film is formed.In turn, the method for forming protective film may include stretching to above-mentioned film.
The average grain diameter of core-shell particle used in film formation is preferably 1nm~500nm.For such average grain diameter
When, the arithmetic average roughness Ra on the surface of obtained protective film can be adjusted to expectation.The average grain diameter of core
Preferably 50nm~300nm, more preferably 70nm~300nm.
As the method for forming film, any suitable method can be used.As concrete example, cast coat can be enumerated
Method (for example, the tape casting), extrusion molding method, injection molding method, compression forming method, transmitting forming process, blow-moulding process, powder at
Shape method, FRP forming process, calendaring molding method, pressure sintering.Preferably extrusion molding method or cast coating method.This is because can mention
The flatness for the film that height obtains obtains good optical homogeneity.Particularly preferably extrusion molding method.This is because, it is not necessary to
Consider the problems of to be caused by residual solvents.Wherein, the stretching of the extrusion molding method of T mould from the productivity of film and later has been used
It is preferred from the perspective of the easiness of processing.Molding condition can according to the composition of the resin used, type, obtain it is thin
Desired characteristic of film etc. is being suitable for setting.
It, can be using any suitable drawing process, stretching condition (for example, draft temperature, stretching times as drawing process
Rate, tensile speed, draw direction).As the concrete example of drawing process, free end stretching can be enumerated, fixing end stretches, freely
End is shunk, fixing end is shunk.These can be used alone, and can use simultaneously, can also gradually use.By in drawing appropriate
It stretches under the conditions of stretching to having suitably adjusted film of the core-shell particle relative to the compounding amount of acrylic resin, thus
Core-shell particle mobile (exudation) arrives the surface of film, as a result, the surface in film forms bumps, it can be thin by obtained protection
The arithmetic average roughness Ra on the surface of film is adjusted to above-mentioned desired range.
Draw direction can use direction appropriate according to purpose.Specifically, length direction, width side can be enumerated
To, thickness direction, oblique.Draw direction can be a direction (being uniaxially stretched), can be both direction (biaxial stretch-formed),
More than can be for three directions.In embodiments of the present invention, representative is that can use being uniaxially stretched, growing for length direction
Spend direction and while width direction biaxial stretch-formed, length direction and width direction it is gradually biaxial stretch-formed.Preferably twin shaft is drawn
Stretch (while or gradually).This is because the control of phase difference is easy in face, optical isotropism easy to accomplish.
Draft temperature can be according to the desired optical characteristics of protective film, mechanical property and thickness, the resin that uses
Type, the thickness of the film used, drawing process (being stretched uniaxially or biaxially), stretching ratio, tensile speed etc. and change.
Specifically, draft temperature is preferably Tg~Tg+50 DEG C, further preferably Tg+15 DEG C~Tg+50 DEG C, is most preferably Tg+35
DEG C~Tg+50 DEG C.By being stretched with such temperature, this makes it possible to obtain the protective films with characteristic appropriate.Specifically
Draft temperature be, for example, 110 DEG C~200 DEG C, preferably 120 DEG C~190 DEG C.When draft temperature is such range, by suitable
Locality adjustment stretching ratio and tensile speed, so that core-shell particle is exuded to the surface of film, the protective film that can will be obtained
The arithmetic average roughness Ra on surface adjust to above-mentioned desired range.
In addition, stretching ratio is also with draft temperature likewise it is possible to flat according to the arithmetic on the desired surface of protective film
Equal roughness Ra, optical characteristics, mechanical property and thickness, the type of the resin used, the thickness of the film used, drawing process
(being stretched uniaxially or biaxially), draft temperature, tensile speed etc. and change.In the case where biaxial stretch-formed, width direction
(TD) ratio (TD/MD) of the stretching ratio of stretching ratio and length direction (MD) is preferably 1.0~1.5, more preferably 1.0~
It 1.4, is more preferably 1.0~1.3.In addition, using it is biaxial stretch-formed when the face multiplying power (stretching ratio and width of length direction
The product of the stretching ratio in direction) it is preferably 2.0~6.0, more preferably 3.0~5.5, further preferably 3.5~5.2.It stretches
When multiplying power is such range, by suitably adjusting draft temperature and tensile speed, so that core-shell particle is exuded to film
Surface, the arithmetic average roughness Ra on the surface of obtained protective film can be adjusted to above-mentioned desired range.
In addition, tensile speed is also with draft temperature likewise it is possible to flat according to the arithmetic on the desired surface of protective film
Equal roughness Ra, optical characteristics, mechanical property and thickness, the type of the resin used, the thickness of the film used, drawing process
(being stretched uniaxially or biaxially), draft temperature, stretching ratio etc. and change.Tensile speed be preferably 3%/second~20%/second,
More preferably 3%/second~15%/second, further preferably 3%/second~10%/second.In the case where biaxial stretch-formed, 1
The tensile speed in direction and the tensile speed in another 1 direction may be the same or different.Tensile speed is such range
When, by suitably adjusting draft temperature and stretching ratio, so that core-shell particle is exuded to the surface of film, can will obtain
The arithmetic average roughness Ra on the surface of protective film is adjusted to above-mentioned desired range.
As above operation in this way, can form protective film.
D. image display device
The polarizer recorded in A~C above-mentioned can be applied to image display device.Therefore, the present invention also includes and uses
The image display device of this polarizer.As the typical example of image display device, liquid crystal display device, organic can be enumerated
Electroluminescent (EL) display device.Image display device is representative be successively have display unit, polarizer, diffusion sheet and
The protective film of light source (backlight), polarizer is configured in the mode opposite with diffusion sheet.
Embodiment
Hereinafter, by embodiment, specifically the present invention will be described, but the present invention is not limited by these embodiments.Each spy
The measuring method of property is as follows.It should be noted that unless otherwise specified, then " part " and " % " in embodiment is weight base
It is quasi-.
(1) thickness
It is measured using digital display dial gauge (ANRITSU CORPORATION system, product name " KC-351C ").
(2) the arithmetic average roughness Ra on the surface of protective film
For arithmetic average roughness Ra, optical profile type profile measurer (Veeco Instruments corporation, quotient are used
The name of an article " Optical Profilometer NT3300 ") it is measured.
(3) Damage Evaluation
The above-mentioned polarizer for the size for being cut into 50mm × 1500mm is fitted in into glass plate (MICRO by adhesive phase
SLIDE GLASS Pre-cleaned Shui Vela grinds t1.3 (MATSUNAMI corporation), product model " S200423 ", size:
65mm × 165mm, 1.2~1.5mm of Thickness), make the laminated body of glass plate and polarizer.Above-mentioned laminated body simulation is again
The composition of liquid crystal display panel is showed.
Diffusion sheet (Sumitomo 3M Limited system, product name " DBEF-D2-400 ") is configured in pallet, it will be above-mentioned
Laminated body is configured on above-mentioned diffusion sheet by the face of polarizer side in the way of lower section.Then, make above-mentioned pallet at 200 beats/min
It is vibrated under conditions of clock × 10 minute.Thereafter, laminated body is taken out, the 1st protective film of visual confirmation polarizer damages
The presence or absence of (scratch block).
<embodiment 1>
(production of polarizer)
1. the production of protective film
With monomethyl amine by MS resin (MS-200；The copolymerization of methyl methacrylate/styrene (molar ratio)=80/20
Object, Nippon Steel Chemical Co., Ltd's system) imidizate (acid imide rate: 5%).Obtained imidizate MS resin has general formula
(1) glutarimide unit (R shown in1And R3For methyl, R2For hydrogen atom), (methyl) acrylate list shown in general formula (2)
Member (R4And R5For methyl) and styrene units.It should be noted that using the engagement type of bore 15mm in above-mentioned imidizate
Rotating Vortex formula double screw extruder.The set temperature of each temperature-controlled zones of extruder is set as 230 DEG C, by screw speed
It is set as 150rpm, MS resin is supplied with 2.0kg/hr, the supply amount of monomethyl amine is set as 2 weights relative to 100 parts by weight of MS resin
Measure part.MS resin is put into from hopper, after being made resin melting with kneading block and be full of, injects monomethyl amine from nozzle.In reaction zone
The end in domain is put into sealing ring, is full of resin.By the pressure of exhaust outlet to -0.08MPa, by-product after making reaction and
Superfluous methyl amine devolatilization.After the resin come out in the form of strands from the mold for being set to outlet of extruder cools down in the sink,
It is granulated with pelletizer.The acid imide rate of obtained imidizate MS resin is 5.0%, acid value 0.5mmol/g.
100 parts by weight of imidizate MS resin and 10 parts by weight of core-shell particle obtained in will be above-mentioned put into single screw rod
Melting mixing is carried out in extruder, and film is carried out by T mould and is formed, 40 μm of thickness of extrusion film is thus obtained.To what is obtained
Extrusion film at 160 DEG C of draft temperature along its length and width direction carries out simultaneously biaxial drawing to 2 times respectively.Stretch speed
Degree is 10%/second in length direction and width direction.
So production protective film.Obtained protective film with a thickness of 10 μm, arithmetic surface roughness Ra is
Phase difference Re (550) is 2nm in 22.18nm, face, thickness direction phase difference Rth (550) is 2nm.
2. the production of polarisation part
By 30 μm of thickness polyvinyl alcohol (PVA) based resin films (KURARAY CO., LTD system, product name " PE3000 ")
Long silver lap on one side with volume stretching-machine by along its length become 5.9 times in a manner of be uniaxially stretched along its length, one
Swelling, dyeing, crosslinking, cleaning treatment are implemented in side simultaneously, finally implement to be dried, and thus make 12 μm of thickness of polarisation part.
Specifically, being stretched to 2.2 times while being handled in 20 DEG C of pure water for swelling treatment.Then,
Dyeing is handled, on one side in the iodine for having adjusted iodine concentration in such a way that the single transmittance of obtained polarisation part becomes 45.0%
It is handled in 30 DEG C of the aqueous solution that weight ratio with potassium iodide is 1:7, is stretched to 1.4 times on one side.In turn, at for crosslinking
Reason, using the crosslinking Treatment in 2 stages, for the crosslinking Treatment in the 1st stage, on one side at 40 DEG C dissolved with boric acid and potassium iodide
It is handled in aqueous solution and is stretched to 1.2 times on one side.The boric acid content of the aqueous solution of the crosslinking Treatment in the 1st stage is 5.0 weights
% is measured, iodate potassium content is set as 3.0 weight %.For the crosslinking Treatment in the 2nd stage, on one side at 65 DEG C dissolved with boric acid and iodine
Change to be handled in the aqueous solution of potassium and is stretched to 1.6 times on one side.The boric acid content of the aqueous solution of the crosslinking Treatment in the 2nd stage is
4.3 weight %, iodate potassium content are set as 5.0 weight %.In addition, for cleaning treatment, in 20 DEG C of potassium iodide aqueous solution into
Row processing.The iodate potassium content of the aqueous solution of cleaning treatment is set as 2.6 weight %.Finally, for drying process, done at 70 DEG C
Dry 5 minutes, obtain polarisation part.
3. the production of polarizer
(the 2nd protective film)
By polyethenol series bonding agent, will be above-mentioned obtained in protective film fit in above-mentioned polarisation part a face make
For the 1st protective film, by polyethenol series bonding agent by TAC film (Janpanese Printing Co., Ltd's system, trade name " DSG-
03 ", 70 μm of thickness) another side of above-mentioned polarisation part is fitted in as the 2nd protective film.
(adhesive phase)
In the reaction vessel for having condenser pipe, nitrogen ingress pipe, thermometer and agitating device by 94.9 parts of butyl acrylate,
5 parts of acrylic acid, 0.1 part of acrylic acid 2- hydroxy methacrylate and add up to 100 parts of (solid component) for 0.3 part relative to aforementioned monomer
Dibenzoyl peroxide is added together with ethyl acetate, under stream of nitrogen gas, 60 DEG C react 7 hours after, into the reaction solution
Ethyl acetate is added, obtains the solution (solid of the acrylic acid series polymeric compounds (B) containing weight average molecular weight 2,200,000, dispersion ratio 3.9
Constituent concentration 30%).Relative to 100 parts of solid component of the aforementioned solution containing acrylic acid series polymeric compounds (B), it is compounded 0.6 part
Trimethylolpropane toluene diisocyanate (Nippon Polyurethane Industry Co., Ltd. system: Coronate
L) and 0.075 part of γ-glycidoxypropyl group methoxy silane (Shin-Etsu Chemial Co., Ltd's system: KBM-403), obtain
The solution of adhesive.Solution above-mentioned is diluted in such a way that solid component concentration becomes 15% with ethyl acetate and is prepared
Adhesive coating fluid.In polyethylene terephthalate (PET) film (Mitsubishis that implement organosilicon processing, 38 μm
Learn Port リ エ ス テ Le Off ィ Le system (strain) system, MRF38) single side, with fountain type die coating machine with coating thickness as 134.0 μm
Mode is coated with the adhesive coating fluid prepared among the above.Then, in 155 DEG C of progress drying in 1 minute, 20 μm of thickness of bonding is formed
Oxidant layer.The adhesive phase is transferred to the surface of above-mentioned TAC film, production polarizer (band adhesive phase).The polarisation that will be obtained
Plate is for above-mentioned evaluation.Show the result in table 1.
<embodiment 2>
The extrusion film for forming 80 μm of thickness in addition to this, is operated similarly with example 1 and using the extrusion film
Make protective film.Obtained protective film is 12.37nm with a thickness of 20 μm, arithmetic average roughness Ra.Use above-mentioned guarantor
Shield film operates similarly with example 1 in addition to this to make polarizer.By above-mentioned polarizer for similarly to Example 1
Evaluation.Show the result in table 1.
<embodiment 3>
The extrusion film for forming 160 μm of thickness in addition to this, is operated similarly with example 1 and using the extrusion film
Make protective film.Obtained protective film is 6.48nm with a thickness of 40 μm, arithmetic average roughness Ra.Use above-mentioned protection
Film operates similarly with example 1 in addition to this to make polarizer.By above-mentioned polarizer for similarly to Example 1
Evaluation.Show the result in table 1.
<embodiment 4>
The extrusion film for forming 120 μm of thickness in addition to this, is operated similarly with example 1 and using the extrusion film
Make protective film.Obtained protective film is 8.17nm with a thickness of 30 μm, arithmetic average roughness Ra.Use above-mentioned protection
Film operates similarly with example 1 in addition to this to make polarizer.By above-mentioned polarizer for similarly to Example 1
Evaluation.Show the result in table 1.
<embodiment 5>
100 parts by weight of imidizate MS resin and 3 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, using the extrusion film, in addition to this, is operated similarly to Example 4 to make and protect
Protect film.Obtained protective film is 6.11nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<embodiment 6>
100 parts by weight of imidizate MS resin and 5 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, using the extrusion film, in addition to this, is operated similarly to Example 4 to make and protect
Protect film.Obtained protective film is 6.79nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<embodiment 7>
100 parts by weight of imidizate MS resin and 20 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, using the extrusion film, in addition to this, is operated similarly to Example 4 to make and protect
Protect film.Obtained protective film is 23.45nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<embodiment 8>
100 parts by weight of imidizate MS resin and 30 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, using the extrusion film, in addition to this, is operated similarly to Example 4 to make and protect
Protect film.Obtained protective film is 31.37nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<embodiment 9>
100 parts by weight of imidizate MS resin and 40 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, using the extrusion film, in addition to this, is operated similarly to Example 4 to make and protect
Protect film.Obtained protective film is 32.79nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<embodiment 10>
Obtained extrusion film is stretched at 140 DEG C of draft temperature, in addition to this, is grasped similarly to Example 4
Make to make protective film.Obtained protective film is 8.06nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned
Protective film operates similarly with example 1 in addition to this to make polarizer.By above-mentioned polarizer for same with embodiment 1
The evaluation of sample.Show the result in table 1.
<embodiment 11>
Obtained extrusion film is stretched at 130 DEG C of draft temperature, in addition to this, is grasped similarly to Example 4
Make to make protective film.Obtained protective film is 6.72nm with a thickness of 30 μm, arithmetic average roughness Ra.Using above-mentioned
Protective film operates similarly with example 1 in addition to this to make polarizer.By above-mentioned polarizer for same with embodiment 1
The evaluation of sample.Show the result in table 1.
<embodiment 12>
Obtained extrusion film is stretched at 170 DEG C of draft temperature, in addition to this, is grasped similarly to Example 4
Make to make protective film.Obtained protective film is 15.76nm with a thickness of 30 μm, arithmetic average roughness Ra.Using upper
Protective film is stated, in addition to this, is operated similarly with example 1 to make polarizer.By above-mentioned polarizer for embodiment 1
Same evaluation.Show the result in table 1.
<embodiment 13>
Obtained extrusion film is stretched at 180 DEG C of draft temperature, in addition to this, is grasped similarly to Example 4
Make to make protective film.Obtained protective film is 17.29nm with a thickness of 30 μm, arithmetic average roughness Ra.Using upper
Protective film is stated, in addition to this, is operated similarly with example 1 to make polarizer.By above-mentioned polarizer for embodiment 1
Same evaluation.Show the result in table 1.
<comparative example 1>
Only imidizate MS resin is put into and carries out melting mixing in single screw extrusion machine, extrusion film is consequently formed,
Obtained extrusion film is stretched at 145 DEG C of draft temperature, in addition to this, operation is similarly to Example 3 to make
Protective film.Obtained protective film is 4.2nm with a thickness of 40 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<comparative example 2>
100 parts by weight of imidizate MS resin and 1 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, using the extrusion film, in addition to this, is operated similarly to Example 3 to make and protect
Protect film.Obtained protective film is 4.93nm with a thickness of 40 μm, arithmetic average roughness Ra.Using above-mentioned protective film,
In addition to this, it operates similarly with example 1 to make polarizer.By above-mentioned polarizer for evaluation similarly to Example 1.
Show the result in table 1.
<comparative example 3>
100 parts by weight of imidizate MS resin and 5 parts by weight of core-shell particle are put into single screw extrusion machine and carried out
Extrusion film is consequently formed in melting mixing, stretches at 100 DEG C of draft temperature to obtained extrusion film, in addition to this,
Operation is similarly to Example 3 to make protective film.Obtained protective film with a thickness of 40 μm, arithmetic average roughness Ra
For 5.14nm.Using above-mentioned protective film, in addition to this, operate similarly with example 1 to make polarizer.By above-mentioned polarisation
Plate is for evaluation similarly to Example 1.Show the result in table 1.
[table 1]
It can be defined according to table 1, the polarizer of comparative example 1~3 is produced because vibrating in the state of contacting with diffusion sheet
It damages, but the polarizer of embodiment 1~13 will not generate abrasion damage vibrating in the state of contacting with diffusion sheet
Wound.
Industrial availability
Polarizer of the invention can be suitably used for image display device.Image display device of the invention can be used for
The portable devices such as portable data assistance (PDA), smart phone, mobile phone, wrist-watch, digital camera, portable game machine；Computer
Display, laptop, the OA equipment such as duplicator；The Household Electricals equipment such as video camera, TV, micro-wave oven；Rearview monitoring
The vehicle-mounted equipment such as device (back monitor), onboard navigation system monitor, automobile audio；Digital signage, commercial store
With presentation devices such as information monitors；The guards equipment such as monitoring monitor；The nursing shield such as monitor, medical monitor
Manage Medical Devices；Etc. various uses.
Description of symbols
1 polarisation part
2 protective films
3 the 2nd protective films
10 polarizers
11 polarizers
Claims (8)
1. a kind of polarizer includes polarisation part and is configured at the protective film of at least side of the polarisation part,
The protective film includes: acrylic resin and the core-shell particle for being scattered in the acrylic resin,
The arithmetic average roughness Ra on the surface of the protective film is 6.0nm or more.
2. polarizer according to claim 1, wherein the acrylic resin has selected from by glutarimide list
At least 1 in the group of member, lactone ring element, maleic anhydride units, maleimide amine unit and glutaric anhydride unit composition.
3. polarizer according to claim 1 or 2, wherein be in opposite with the polarisation part in the protective film
The surface of side is formed with the bumps as caused by the core-shell particle.
4. polarizer described in any one of claim 1 to 3, wherein the protective film is relative to the acrylic acid
It is that 100 parts by weight of resin include 3 parts by weight of core-shell particle~50 parts by weight.
5. polarizer according to any one of claims 1 to 4, wherein the core-shell particle is included to be gathered by rubber-like
Close the core that object is constituted and the coating for covering the core being made of glassy polymers.
6. polarizer according to any one of claims 1 to 5, wherein the protective film is biaxially oriented film.
7. polarizer described according to claim 1~any one of 6, wherein do not have on the surface of the protective film and expand
Dissipate layer.
8. a kind of image display device, successively has: display unit, polarizer according to any one of claims 1 to 7,
Diffusion sheet and light source,
The protective film of the polarizer is configured in the mode opposite with the diffusion sheet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-050372 | 2017-03-15 | ||
| JP2017050372A JP7182854B2 (en) | 2017-03-15 | 2017-03-15 | Polarizing plate and image display device |
| PCT/JP2018/007681 WO2018168481A1 (en) | 2017-03-15 | 2018-03-01 | Polarizing plate and image display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110446953A true CN110446953A (en) | 2019-11-12 |
Family
ID=63523422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880017823.1A Pending CN110446953A (en) | 2017-03-15 | 2018-03-01 | Polarizer and image display device |
Country Status (5)
| Country | Link |
|---|---|
| JP (2) | JP7182854B2 (en) |
| KR (1) | KR102641140B1 (en) |
| CN (1) | CN110446953A (en) |
| TW (1) | TWI766963B (en) |
| WO (1) | WO2018168481A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917577A (en) * | 2021-12-13 | 2022-01-11 | 恒美光电股份有限公司 | High-water-resistance and bending-resistance optical protective film, polarizer and liquid crystal display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2020027085A1 (en) * | 2018-07-31 | 2021-08-02 | コニカミノルタ株式会社 | Optical film, polarizing plate, and method for manufacturing optical film |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261328A (en) * | 2007-03-08 | 2008-09-10 | 富士胶片株式会社 | Transparent protective film, optical compensation film, polarizing plate, and liquid crystal display device |
| JP2010096919A (en) * | 2008-10-15 | 2010-04-30 | Asahi Kasei Chemicals Corp | Optical film |
| JP2011088946A (en) * | 2009-10-20 | 2011-05-06 | Sumitomo Chemical Co Ltd | Acrylic resin film |
| CN102341732A (en) * | 2009-03-06 | 2012-02-01 | 柯尼卡美能达精密光学株式会社 | Process for producing polarizing plate, polarizing plate produced by the process, and liquid crystal display device using the polarizing plate |
| CN102445717A (en) * | 2010-09-30 | 2012-05-09 | 株式会社Jiro企业策划 | Protection sheet and polarizing plate |
| WO2016157913A1 (en) * | 2015-03-31 | 2016-10-06 | 株式会社カネカ | Process for producing stretched acrylic-resin film |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100831480B1 (en) * | 2006-07-24 | 2008-05-21 | 주식회사 에이스 디지텍 | Method for manufacturing of anti-reflective compensation film |
| JPWO2008136346A1 (en) * | 2007-04-26 | 2010-07-29 | 日本ゼオン株式会社 | Protective film for display screen and polarizing plate |
| JP2010286827A (en) * | 2009-05-14 | 2010-12-24 | Jiroo Corporate Plan:Kk | Polarizer protective film, polarizing plate and liquid crystal display element |
| JP6039168B2 (en) * | 2010-09-30 | 2016-12-07 | 恵和株式会社 | Protective sheet, method for producing protective sheet and polarizing plate |
| US9273208B2 (en) * | 2011-02-21 | 2016-03-01 | Kaneka Corporation | Acrylic resin film |
| JP2013109116A (en) * | 2011-11-21 | 2013-06-06 | Konica Minolta Advanced Layers Inc | Method for manufacturing polarizing film protection film, polarizing film protection film, polarizing plate and liquid crystal display device using the same |
| KR20140047548A (en) * | 2012-10-12 | 2014-04-22 | 후지필름 가부시키가이샤 | Optical film and method for producing the same, polarizing plate, and liquid crystal display device |
| JP2015123618A (en) | 2013-12-25 | 2015-07-06 | 株式会社カネカ | Method for producing optical film |
| JP6479362B2 (en) * | 2014-07-31 | 2019-03-06 | 株式会社カネカ | Polarizer protective film and polarizing plate |
| JP2016071264A (en) * | 2014-09-30 | 2016-05-09 | 富士フイルム株式会社 | Optical film, polarizing plate protection film, polarizing plate, and liquid crystal display device |
| JP6100876B1 (en) | 2015-10-02 | 2017-03-22 | 住友化学株式会社 | Protective film for polarizing plate |
| JP2016218478A (en) | 2016-09-13 | 2016-12-22 | 住友化学株式会社 | Acrylic resin film and polarizing plate |
-
2017
- 2017-03-15 JP JP2017050372A patent/JP7182854B2/en active Active
-
2018
- 2018-03-01 WO PCT/JP2018/007681 patent/WO2018168481A1/en active Application Filing
- 2018-03-01 CN CN201880017823.1A patent/CN110446953A/en active Pending
- 2018-03-01 KR KR1020197026119A patent/KR102641140B1/en active IP Right Grant
- 2018-03-14 TW TW107108588A patent/TWI766963B/en active
-
2021
- 2021-10-21 JP JP2021172320A patent/JP2022009348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261328A (en) * | 2007-03-08 | 2008-09-10 | 富士胶片株式会社 | Transparent protective film, optical compensation film, polarizing plate, and liquid crystal display device |
| JP2010096919A (en) * | 2008-10-15 | 2010-04-30 | Asahi Kasei Chemicals Corp | Optical film |
| CN102341732A (en) * | 2009-03-06 | 2012-02-01 | 柯尼卡美能达精密光学株式会社 | Process for producing polarizing plate, polarizing plate produced by the process, and liquid crystal display device using the polarizing plate |
| JP2011088946A (en) * | 2009-10-20 | 2011-05-06 | Sumitomo Chemical Co Ltd | Acrylic resin film |
| CN102445717A (en) * | 2010-09-30 | 2012-05-09 | 株式会社Jiro企业策划 | Protection sheet and polarizing plate |
| WO2016157913A1 (en) * | 2015-03-31 | 2016-10-06 | 株式会社カネカ | Process for producing stretched acrylic-resin film |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917577A (en) * | 2021-12-13 | 2022-01-11 | 恒美光电股份有限公司 | High-water-resistance and bending-resistance optical protective film, polarizer and liquid crystal display device |
| CN113917577B (en) * | 2021-12-13 | 2022-05-31 | 恒美光电股份有限公司 | High-water-resistance and bending-resistance optical protective film, polarizer and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190121320A (en) | 2019-10-25 |
| TWI766963B (en) | 2022-06-11 |
| JP7182854B2 (en) | 2022-12-05 |
| JP2022009348A (en) | 2022-01-14 |
| JP2018155809A (en) | 2018-10-04 |
| TW201842011A (en) | 2018-12-01 |
| KR102641140B1 (en) | 2024-02-28 |
| WO2018168481A1 (en) | 2018-09-20 |
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