CN111919149A - Polarizer, polarizing film, laminated polarizing film, image display panel, and image display device - Google Patents
Polarizer, polarizing film, laminated polarizing film, image display panel, and image display device Download PDFInfo
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- CN111919149A CN111919149A CN201980022317.6A CN201980022317A CN111919149A CN 111919149 A CN111919149 A CN 111919149A CN 201980022317 A CN201980022317 A CN 201980022317A CN 111919149 A CN111919149 A CN 111919149A
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- film
- polarizer
- polarizing film
- image display
- polarizing
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- 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
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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
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- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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Abstract
A polarizer is formed of a polyvinyl alcohol film, and the polarizer contains boron and potassium, and the polarizer has a boron content of 4 wt% or more and 6 wt% or less, and a value obtained by multiplying the boron content (% by weight) by the potassium content (% by weight) of 1.2 or more. The polarizing plate is excellent in the effect of suppressing the decrease in optical characteristics under a high-temperature environment.
Description
Technical Field
The invention relates to a polarizer, a polarizing film, a laminated polarizing film, an image display panel, and an image display device.
Background
Conventionally, a dyed (dichroic substance-containing) polyvinyl alcohol film has been used as a polarizer used in various image display devices such as liquid crystal display devices and organic EL display devices, because of having both high transmittance and high polarization degree. The polarizer is produced by subjecting a polyvinyl alcohol film to various treatments such as swelling, dyeing, crosslinking, and stretching in a bath, washing the film, and then drying the film. The polarizer is generally used in the form of a polarizing film (polarizing plate) in which a protective film such as triacetylcellulose is bonded to one or both surfaces thereof with an adhesive.
The polarizing film is used by laminating a polarizing film (optical laminate) in which another optical layer is laminated as necessary, and the polarizing film or the laminated polarizing film (optical laminate) is bonded between an image display unit such as a liquid crystal cell or an organic EL element and a transparent plate such as a front panel or a touch panel on the visual recognition side via an adhesive layer, and is used as the various image display devices described above.
In recent years, such various image display devices have been widely used as in-vehicle image display devices such as car navigation devices and rear view monitors (Back monitors) in addition to mobile devices such as mobile phones and tablet terminals. In response to this, the polarizing film and the laminated polarizing film are required to have higher durability in a severer environment (for example, in a high-temperature environment) than that required in the past, and a polarizing film for the purpose of ensuring such durability has been proposed (patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese Kohyo publication No. 2012-516468
Disclosure of Invention
Problems to be solved by the invention
The conventional polarizing film and laminated polarizing film described above have the following problems: when exposed to a high temperature environment, polyvinyl alcohol undergoes polyalkylenation, whereby the polarizer is colored, and the optical characteristics thereof are degraded. In particular, an image display device formed by laminating the above-described polarizing film or laminated polarizing film between an image display unit and a transparent plate via an adhesive layer has a problem that coloring of a polarizer is remarkable and deterioration of optical characteristics thereof is remarkable.
In view of the above circumstances, an object of the present invention is to provide a polarizer having an excellent effect of suppressing a decrease in optical characteristics in a high-temperature environment.
It is another object of the present invention to provide a polarizing film, a laminated polarizing film, an image display panel, and an image display device, each using a polarizer having an excellent effect of suppressing the reduction in optical characteristics.
Means for solving the problems
That is, the present invention relates to a polarizer formed of a polyvinyl alcohol-based thin film, the polarizer including boron and potassium, wherein a content of boron in the polarizer is 4 wt% or more and 6 wt% or less, and a value obtained by multiplying a content (wt%) of boron by a content (wt%) of potassium is 1.2 or more.
The present invention also relates to a polarizing film in which a transparent protective film is bonded to at least one surface of the polarizer.
The present invention also relates to a laminated polarizing film in which the polarizing film is bonded to an optical layer.
The present invention also relates to an image display panel in which the polarizing film or the laminated polarizing film is bonded to an image display unit.
The present invention also relates to an image display device including a transparent plate on the polarizing film or laminated polarizing film side of the image display panel.
ADVANTAGEOUS EFFECTS OF INVENTION
The details of the action mechanism of the effects of the polarizer of the present invention, the polarizing film having the polarizer, the laminated polarizing film, the image display panel, and the image display device are not clear, and are presumed as follows. However, the present invention is not to be construed as limited by this mechanism of action.
The polarizing element of the present invention is formed of a polyvinyl alcohol-based film and contains boron and potassium. In the polarizing plate, the content of boron is 4 wt% or more and 6 wt% or less, and a value obtained by multiplying the content of boron (wt%) by the content of potassium (wt%) is 1.2 or more. It is known that the former polarizer contains boron and potassium, but the polarizer of the present invention can further improve heat resistance compared to the former polarizer by containing boron and potassium in the above-mentioned specific amounts. In particular, it is not known that a polarizer having a value obtained by multiplying the content (wt%) of boron by the content (wt%) of potassium of 1.2 or more, as in the polarizer of the present invention, exhibits excellent heat resistance as compared with a polarizer having a value smaller than the above.
Conventionally, an image display device configured by laminating a polarizing film or a laminated polarizing film between an image display unit and a transparent plate via an adhesive layer has the following problems: when the polarizing material is exposed to a high-temperature environment, moisture or the like contained in the polarizing material, the adhesive layer, or the like is trapped in the image display device, and thus deterioration (polyalkylenation) of polyvinyl alcohol in the polarizing material is promoted, and thus the optical characteristics thereof are remarkably reduced.
In addition, in the image display device exposed to a high-temperature environment as described above, there is a problem that the polarizer is deteriorated due to polyene formation, and the polarizer is cracked. In general, the end portions of the polarizing film are covered with the frame, and therefore, poor appearance of the end portions is acceptable, but in recent image display devices, the frame is being thinned from the viewpoint of design, and is even manufactured as a frameless type. Therefore, even a slight defect at the edge of the polarizing film impairs the appearance, and it is very important to prevent the crack in order to produce the image display device. On the other hand, the polarizer of the present invention can exhibit the effect of preventing the occurrence of the above-described cracks by adjusting the upper limit of the content of the specific amount of boron in the polarizer to 5.2 wt% or less.
Further, in the image display device described above, a laminate having a low moisture permeability (for example, a moisture permeability of 200 g/(m))224h) or less), moisture in the polarizing material is less likely to penetrate through the transparent protective film, and therefore the moisture is confined in the polarizing material, and it is estimated that the polyene formation as described above is further promoted. Therefore, the polarizer of the present invention is particularly useful for a mode in which a transparent protective film having low moisture permeability is bonded to at least one surface of the polarizer.
Detailed Description
< polarizing plate >
The polarizing plate of the present invention is formed of a polyvinyl alcohol-based thin film and contains boron and potassium, and the content of boron in the polarizing plate is 4 wt% or more and 6 wt% or less, and the value obtained by multiplying the content of boron (wt%) by the content of potassium (wt%) is 1.2 or more.
The polyvinyl alcohol (PVA) film may be a film having light transmittance in the visible light region and having a dichroic substance such as iodine or a dichroic dye dispersed and adsorbed therein, without any particular limitation. In general, the PVA film used as the base material has a thickness of preferably about 10 to 100 μm, more preferably about 20 to 75 μm, and a width of preferably about 100 to 5000 mm.
Examples of the material of the polyvinyl alcohol-based film include polyvinyl alcohol and derivatives thereof. Examples of the polyvinyl alcohol derivative include polyvinyl formal and polyvinyl acetal; and modified with olefins such as ethylene and propylene, unsaturated carboxylic acids such as acrylic acid, methacrylic acid and crotonic acid, alkyl esters thereof, acrylamide and the like. The polyvinyl alcohol preferably has an average polymerization degree of about 100 to 10,000, more preferably about 1,000 to 10,000, and still more preferably about 1,500 to 4,500. The saponification degree of the polyvinyl alcohol is preferably about 80 to 100 mol%, more preferably about 95 to 99.95 mol%. The average polymerization degree and the saponification degree can be determined according to JIS K6726.
The polyvinyl alcohol film may contain additives such as a plasticizer and a surfactant. Examples of the plasticizer include polyhydric alcohols such as glycerin, diglycerin, triglycerol, ethylene glycol, propylene glycol, and polyethylene glycol, and condensates thereof. The amount of the additive is not particularly limited, and is preferably about 20% by weight or less in the polyvinyl alcohol film.
The polarizing material contains boron and potassium, and the content of boron in the polarizing material is 4 wt% or more and 6 wt% or less, and the value obtained by multiplying the content of boron (wt%) by the content of potassium (wt%) is 1.2 or more. When the boron content (% by weight) is defined as "B" and the potassium content (% by weight) is defined as "K", a value obtained by multiplying the boron content (% by the potassium content (% by weight) may be defined as "B × K ≧ 1.2" or more.
The content of boron in the polarizer is preferably 4.0 wt% or more, more preferably 4.2 wt% or more from the viewpoint of suppressing a decrease in optical characteristics of the polarizer in a high-temperature environment, and is preferably 5.2 wt% or less, more preferably 5.0 wt% or less from the viewpoint of suppressing the occurrence of cracks in the polarizer in a high-temperature environment.
In the polarizing plate, the content of potassium is preferably 0.28% by weight or more, more preferably 0.32% by weight or more, and further preferably 0.34% by weight or more from the viewpoint of suppressing a decrease in optical characteristics of the polarizing plate in a high-temperature environment, and is preferably 0.60% by weight or less, more preferably 0.55% by weight or less, and further preferably 0.50% by weight or less from the viewpoint of suppressing a change in hue in a high-temperature environment.
In the polarizing material, the value obtained by multiplying the content (wt%) of boron by the content (wt%) of potassium (wt%) (content (wt%) of boron × content (wt%) of potassium) is preferably 1.2 or more, more preferably 1.3 or more, and even more preferably 1.4 or more, from the viewpoint of suppressing a decrease in optical characteristics of the polarizing material in a high-temperature environment, and is preferably 3.5 or less, more preferably 3.0 or less, and even more preferably 2.5 or less, from the viewpoint of suppressing a change in hue in a high-temperature environment.
In the polarizing material, the value obtained by dividing the content (% by weight) of boron by the content (% by weight) of potassium (content (% by weight) of boron/content (% by weight) of potassium) is preferably 5 or more, more preferably 8 or more, and further preferably 10 or more, from the viewpoint of suppressing a decrease in optical characteristics of the polarizing material in a high-temperature environment, and is preferably 30 or less, more preferably 25 or less, and further preferably 20 or less, from the viewpoint of improving the initial hue of the polarizing material.
< method for producing polarizing plate >
The polarizer is obtained by optionally performing at least 1 treatment step of a dyeing step, a crosslinking step, and a stretching step, and a swelling step, a washing step, and a drying step on the polyvinyl alcohol film. The content of boron and the content of potassium contained in the polarizer can be controlled by the concentration of a boron component supplying substance such as boric acid, a boron compound such as borate or borax, the concentration of a potassium component supplying substance such as potassium halide such as potassium iodide, the treatment temperature and the treatment time of each treatment bath contained in any one of the treatment baths in the swelling step, the dyeing step, the crosslinking step, the stretching step and the cleaning step. In particular, in the crosslinking step and the stretching step, the content of boron can be easily adjusted to a desired range by treatment conditions such as the concentration of the boron component-supplying substance. In the washing step, the content of boron and the content of potassium can be easily adjusted to desired ranges from the viewpoint that components such as boron and potassium can be eluted from or adsorbed to the polyvinyl alcohol film in consideration of the processing conditions such as the amount of the boron component-supplying substance and the potassium component-supplying substance used in the dyeing step, the crosslinking step, the stretching step, and the like.
The swelling step is a treatment step of immersing the polyvinyl alcohol film in a swelling bath, and can remove stains, blocking agents, and the like on the surface of the polyvinyl alcohol film, and can suppress uneven dyeing by swelling the polyvinyl alcohol film. The swelling bath generally uses a medium containing water as a main component, such as water, distilled water, or pure water. The swelling bath may be appropriately added with a surfactant, alcohol, or the like by a conventional method. In this case, the concentration of potassium iodide in the swelling bath is preferably 1.5% by weight or less, more preferably 1.0% by weight or less, and still more preferably 0.5% by weight or less.
The temperature of the swelling bath is preferably about 10 to 60 ℃, more preferably about 15 to 45 ℃, and further preferably about 18 to 30 ℃. The immersion time in the swelling bath is not always determined because the degree of swelling of the polyvinyl alcohol film is affected by the temperature of the swelling bath, and is preferably about 5 to 300 seconds, more preferably about 10 to 200 seconds, and still more preferably about 20 to 100 seconds. The swelling step may be performed only 1 time, or may be performed a plurality of times as needed.
The dyeing step is a treatment step of immersing the polyvinyl alcohol film in a dyeing bath (iodine solution), and the dichroic material such as iodine or a dichroic dye can be adsorbed and oriented in the polyvinyl alcohol film. The iodine solution is preferably an aqueous iodine solution, and contains iodine and an iodide as a dissolution aid. The iodide includes potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, titanium iodide, and the like. Among these, potassium iodide is suitable from the viewpoint of controlling the content of the potassium in the polarizing material.
The concentration of iodine in the dyeing bath is preferably about 0.01 to 1 wt%, more preferably about 0.02 to 0.5 wt%. The concentration of the iodide in the dyeing bath is preferably about 0.01 to 10 wt%, more preferably about 0.05 to 5 wt%, and still more preferably about 0.1 to 3 wt%.
The temperature of the dyeing bath is preferably about 10 to 50 ℃, more preferably about 15 to 45 ℃, and further preferably about 18 to 30 ℃. The immersion time in the dyeing bath is not generally determined because the degree of dyeing of the polyvinyl alcohol film is affected by the temperature of the dyeing bath, and is preferably about 10 to 300 seconds, and more preferably about 20 to 240 seconds. The dyeing step may be performed only 1 time, or may be performed a plurality of times as needed.
The crosslinking step is a treatment step of immersing the polyvinyl alcohol film dyed in the dyeing step in a treatment bath (crosslinking bath) containing a boron compound, and the polyvinyl alcohol film is crosslinked by the boron compound, so that iodine molecules or dye molecules can be adsorbed to the crosslinked structure. Examples of the boron compound include boric acid, borate, and borax. The crosslinking bath is usually an aqueous solution, but may be a mixed solution of an organic solvent miscible with water and water, for example. In addition, from the viewpoint of controlling the content of the potassium in the polarizer, the crosslinking bath preferably contains potassium iodide.
The concentration of the boron compound in the crosslinking bath is preferably about 1 to 15 wt%, more preferably about 1.5 to 10 wt%, and still more preferably about 2 to 5 wt%. When potassium iodide is used in the crosslinking bath, the concentration of potassium iodide in the crosslinking bath is preferably about 1 to 15 wt%, more preferably about 1.5 to 10 wt%, and still more preferably about 2 to 5 wt%.
The temperature of the crosslinking bath is preferably about 20 to 70 ℃, more preferably about 30 to 60 ℃. The immersion time in the crosslinking bath is not generally determined because the degree of crosslinking of the polyvinyl alcohol film is affected by the temperature of the crosslinking bath, and is preferably about 5 to 300 seconds, and more preferably about 10 to 200 seconds. The crosslinking step may be performed only 1 time, or may be performed a plurality of times as needed.
The stretching step is a treatment step of stretching the polyvinyl alcohol film to a predetermined magnification in at least one direction. The polyvinyl alcohol film is usually stretched 1-axis in the transport direction (longitudinal direction). The method of stretching is not particularly limited, and any of wet stretching and dry stretching may be employed. The stretching step may be performed only 1 time, or may be performed a plurality of times as needed. The stretching step may be performed at any stage in the production of the polarizer.
In the wet stretching method, a solvent such as water or a mixed solution of an organic solvent miscible with water and water is usually used as the treatment bath (stretching bath). From the viewpoint of controlling the content of the potassium in the polarizer, the stretching bath preferably contains potassium iodide. When potassium iodide is used in the stretching bath, the concentration of potassium iodide in the stretching bath is preferably about 1 to 15 wt%, more preferably about 2 to 10 wt%, and still more preferably about 3 to 6 wt%. In addition, the boron compound may be contained in the treatment bath (stretching bath) from the viewpoint of suppressing film breakage during stretching, and in this case, the concentration of the boron compound in the stretching bath is preferably about 1 to 15% by weight, more preferably about 1.5 to 10% by weight, and still more preferably about 2 to 5% by weight.
The temperature of the stretching bath is preferably about 25 to 80 ℃, more preferably about 40 to 75 ℃, and further preferably about 50 to 70 ℃. The immersion time in the stretching bath is not generally determined because the degree of stretching of the polyvinyl alcohol film is affected by the temperature of the stretching bath, and is preferably about 10 to 800 seconds, and more preferably about 30 to 500 seconds. The stretching treatment in the wet stretching method may be performed together with any 1 or more treatment steps of the swelling step, the dyeing step, the crosslinking step, and the washing step.
Examples of the dry stretching method include an inter-roll stretching method, a hot-roll stretching method, and a compression-stretching method. The dry drawing method may be performed together with the drying step.
The total draw ratio (cumulative draw ratio) to be applied to the polyvinyl alcohol film may be set as appropriate depending on the purpose, and is preferably about 2 to 7 times, more preferably about 3 to 6.8 times, and still more preferably about 3.5 to 6.5 times.
The cleaning step is a treatment step of immersing the polyvinyl alcohol film in a cleaning bath, and can remove foreign matter remaining on the surface of the polyvinyl alcohol film. The cleaning bath generally uses a medium containing water as a main component, such as water, distilled water, or pure water. In addition, from the viewpoint of controlling the content of potassium in the polarizer, potassium iodide is preferably used in the cleaning bath, and in this case, the concentration of potassium iodide in the cleaning bath is preferably about 1 to 10% by weight, more preferably about 1.5 to 4% by weight, and still more preferably about 1.8 to 3.8% by weight.
The temperature of the cleaning bath is preferably about 5 to 50 ℃, more preferably about 10 to 40 ℃, and further preferably about 15 to 30 ℃. The immersion time in the cleaning bath is not generally determined because the degree of cleaning of the polyvinyl alcohol film is affected by the temperature of the cleaning bath, and is preferably about 1 to 100 seconds, more preferably about 2 to 50 seconds, and still more preferably about 3 to 20 seconds. The swelling step may be performed only 1 time, or may be performed a plurality of times as needed.
The drying step is a step of drying the polyvinyl alcohol film washed in the washing step to obtain a polarizing plate, and the polarizing plate having a desired moisture content can be obtained by drying. The drying may be performed by any suitable method, and examples thereof include natural drying, air-blowing drying, and heat drying. The polarizer preferably has a water content of about 8 to 25 wt%, more preferably about 12 to 20 wt%. The moisture content of the polarizer was calculated from the following equation based on the initial weight of a sample cut into a size of 100mm square and the dry weight after drying at 120 ℃ for 2 hours.
Water content (% by weight) { (initial weight-dry weight)/initial weight } × 100
The drying temperature is preferably about 20 to 150 ℃, more preferably about 25 to 100 ℃. The drying time is not generally determined because the degree of drying of the polarizer is affected by the drying temperature, and is preferably about 30 to 600 seconds, and more preferably about 60 to 300 seconds. The drying step may be performed only 1 time, or may be performed a plurality of times as needed.
The thickness of the polarizer is preferably about 10 to 30 μm, and more preferably about 12 to 20 μm.
< polarizing film >
In the polarizing film of the present invention, a transparent protective film is bonded to at least one surface of the polarizer.
The transparent protective film is not particularly limited, and various transparent protective films conventionally used for polarizing films can be used. As a material constituting the transparent protective film, for example, a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture blocking property, isotropy, and the like is used. Examples of the thermoplastic resin include cellulose ester resins such as triacetylcellulose, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyether sulfone resins, polysulfone resins, polycarbonate resins, polyamide resins such as nylon and aromatic polyamide, polyimide resins, polyolefin resins such as polyethylene, polypropylene and ethylene-propylene copolymers, (meth) acrylic resins, cyclic polyolefin resins having a ring system and/or a norbornene structure (norbornene resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof. The transparent protective film may be a cured layer made of a thermosetting resin or an ultraviolet-curable resin such as a (meth) acrylic resin, a urethane resin, an acrylic urethane resin, an epoxy resin, or a silicone resin. Among these, cellulose ester resins, polycarbonate resins, (meth) acrylic resins, cyclic polyolefin resins, and polyester resins are suitable.
The thickness of the transparent protective film may be suitably determined, and is preferably about 1 to 500 μm, more preferably about 1 to 300 μm, and still more preferably about 5 to 100 μm, from the viewpoint of strength, handling properties such as handling properties, and thin layer properties. The thickness of the transparent protective film is preferably about 10 to 100 μm, more preferably about 20 to 100 μm, and still more preferably about 30 to 100 μm, from the viewpoint of reducing the moisture permeability of the transparent protective film.
The transparent protective film preferably has a moisture permeability of 800 g/(m) from the viewpoint of suppressing a decrease in polarizing performance in a high-temperature and high-humidity environment224h) or less, more preferably 400 g/(m)224h) or less, more preferably 200 g/(m)224h) or less, more preferably 150 g/(m)224h) or less. The transparent protective film on one surface of the polarizer preferably has a moisture permeability of 200 g/(m)224h) or less, more preferably 150 g/(m)224h) or less. The moisture permeability can be calculated as follows: the weight gain of calcium chloride before and after being left for 24 hours was measured by placing a sample cut into a diameter of 60mm in a moisture permeable cup containing about 15g of calcium chloride and in a thermostat at a temperature of 40 ℃ and a humidity of 90% R.H. according to the moisture permeability test (cup method) of JIS Z0208.
When the transparent protective films are bonded to both surfaces of the polarizer, the transparent protective films may be the same or different.
The transparent protective film may be a retardation plate having a retardation of 40nm or more in the front direction and/or 80nm or more in the thickness direction. The front phase difference is usually controlled to be in the range of 40 to 200nm, and the thickness direction phase difference is usually controlled to be in the range of 80 to 300 nm. When a retardation plate is used as the transparent protective film, the retardation plate also functions as a transparent protective film, and therefore, the thickness can be reduced.
Examples of the retardation plate include a birefringent film obtained by uniaxially or biaxially stretching a polymer material, an oriented film of a liquid crystal polymer, and a film in which an oriented layer of a liquid crystal polymer is supported by a film. The thickness of the retardation plate is not particularly limited, and is usually about 20 to 150 μm. The phase plate may be used by bonding the phase plate to a transparent protective film having no retardation.
The transparent protective film may be subjected to a surface modification treatment. Examples of the surface modification treatment include corona treatment, plasma treatment, primer treatment, and saponification treatment.
The surface of the transparent protective film to which the polarizer is not attached may be subjected to hard coat treatment, antireflection treatment, treatment for the purpose of adhesion prevention, diffusion, and/or antiglare. The hard coat treatment, the antireflection layer, the release layer, the diffusion layer, and/or the treatment for the purpose of antiglare may be provided on the transparent protective film itself, or may be provided separately as an optical layer on an object different from the transparent protective film.
The transparent protective film may contain any suitable additive such as an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a mold release agent, a coloring inhibitor, a flame retardant, an antistatic agent, a pigment, and a colorant.
In order to bond the polarizer and the transparent protective film, an adhesive is generally used. Examples of the adhesive include an isocyanate adhesive, a polyvinyl alcohol adhesive, a gelatin adhesive, a vinyl latex adhesive, and an aqueous polyester. The adhesive is usually used in the form of an aqueous adhesive, and usually contains 0.5 to 60% by weight of a solid content. Examples of the adhesive include an ultraviolet-curable adhesive, an electron beam-curable adhesive, and the like, in addition to the above. The adhesive may contain a metal compound filler.
The adhesive may be applied to either the transparent protective film or the polarizer, or to both. After the bonding, a drying step is performed to form an adhesive layer including a coating dry layer. The polarizing material and the transparent protective film may be bonded to each other by a roll laminator or the like. After the drying step, ultraviolet rays and electron beams may be irradiated as necessary. The thickness of the adhesive layer is not particularly limited, but is preferably about 30 to 5000nm, and more preferably about 100 to 1000 nm.
< laminated polarizing film >
The laminated polarizing film (optical laminate) of the present invention is obtained by laminating the polarizing film on an optical layer. The optical layer is not particularly limited, and for example, an optical layer used in the formation of a liquid crystal display device such as a 1-layer or 2-layer or more reflective plate, semi-transmissive plate, retardation plate (including wavelength plates such as 1/2 and 1/4), viewing angle compensation film, or the like can be used. The laminated polarizing film includes, in particular: a reflection-type polarizing film or a semi-transmission-type polarizing film in which a reflection plate or a semi-transmission plate is laminated on the polarizing film, an elliptical polarizing film or a circular polarizing film in which a retardation plate is laminated on the polarizing film, a wide-viewing-angle polarizing film in which a viewing-angle compensation film is laminated on the polarizing film, or a polarizing film in which a brightness enhancement film is laminated on the polarizing film.
An adhesive layer for bonding an image display unit such as a liquid crystal unit or an organic EL element to another member such as a front transparent plate on the viewing side or a transparent plate such as a touch panel may be provided on one surface or both surfaces of the polarizing film or the laminated polarizing film. As the adhesive layer, an adhesive layer is suitable. The adhesive agent for forming the adhesive layer is not particularly limited, and for example, an adhesive agent containing a polymer such as an acrylic polymer, a silicone polymer, a polyester, a polyurethane, a polyamide, a polyether, a fluorine-based polymer, or a rubber-based polymer as a base polymer can be suitably selected and used. In particular, a pressure-sensitive adhesive excellent in optical transparency, exhibiting appropriate wettability, aggregability, adhesiveness, weather resistance, heat resistance and the like, such as a pressure-sensitive adhesive containing an acrylic polymer, is preferably used.
The pressure-sensitive adhesive layer preferably contains a low content of an organic acid monomer such as acrylic acid. By reducing the organic acid monomer content in the adhesive layer, a decrease in transmittance due to polyene formation of polyvinyl alcohol can be suppressed even in the case where the image display device is exposed to a high-temperature environment.
The adhesive layer may be attached to one or both surfaces of the polarizing film or the laminated polarizing film in an appropriate manner. Examples of the method of attaching the pressure-sensitive adhesive layer include the following methods: a method of preparing a binder solution and directly applying the binder solution to the polarizing film or the laminated polarizing film by an appropriate development method such as a casting method or a coating method; or a method of forming an adhesive layer on a separator and transferring the adhesive layer to the polarizing film or the laminated polarizing film. The thickness of the pressure-sensitive adhesive layer may be suitably determined depending on the purpose of use, adhesion, and the like, and is usually 1 to 500. mu.m, preferably 5 to 200. mu.m, and more preferably 10 to 100. mu.m.
The exposed surface of the pressure-sensitive adhesive layer is preferably protected by temporarily bonding a separator for the purpose of preventing contamination or the like until the pressure-sensitive adhesive layer is actually used. This can prevent contamination of the pressure-sensitive adhesive layer and the like in a normal handling state. Examples of the separator include separators obtained by coating an appropriate thin layer body such as a plastic film, a rubber sheet, paper, cloth, nonwoven fabric, net, foamed sheet, metal foil, or a laminate thereof with an appropriate release agent such as silicone-based, long-chain alkyl-based, fluorine-based, or molybdenum sulfide, if necessary.
< image display Panel and image display device >
In the image display panel of the present invention, the polarizing film or the laminated polarizing film is bonded to an image display unit. The image display device of the present invention includes a transparent plate on the polarizing film or laminated polarizing film side (viewing side) of the image display panel.
Examples of the image display unit include a liquid crystal unit and an organic EL unit. As the liquid crystal cell, for example, any of a reflective liquid crystal cell using external light, a transmissive liquid crystal cell using light from a light source such as a backlight, and a semi-transmissive semi-reflective liquid crystal cell using both light from the outside and light from the light source can be used. In the case where the liquid crystal cell uses light from a light source, the image display device (liquid crystal display device) further includes a polarizing film and a light source on the opposite side of the image display cell (liquid crystal cell) from the viewing side. The polarizing film on the light source side and the liquid crystal cell are preferably bonded via an appropriate adhesive layer. As a driving method of the liquid crystal cell, for example, any type of mode such as VA mode, IPS mode, TN mode, STN mode, bend alignment (pi-type) and the like can be used.
As the organic EL unit, for example, an organic EL unit in which a transparent electrode, an organic light-emitting layer, and a metal electrode are sequentially stacked on a transparent substrate to form a light-emitting body (organic electroluminescent light-emitting body) can be suitably used. The organic light-emitting layer is a laminate of various organic thin films, and for example, a laminate of a hole-injecting layer containing triphenylamine derivative or the like and a light-emitting layer containing a fluorescent organic solid such as anthracene, a laminate of these light-emitting layers and an electron-injecting layer containing perylene derivative or the like, or a laminate of a hole-injecting layer, a light-emitting layer, and an electron-injecting layer, can be used.
Examples of the transparent plate disposed on the viewing side of the image display unit include a front transparent plate (window layer), a touch panel, and the like. As the front transparent plate, a transparent plate having appropriate mechanical strength and thickness can be used. As such a transparent plate, for example, a transparent resin plate such as an acrylic resin or a polycarbonate resin, a glass plate, or the like can be used. As the touch panel, for example, various touch panels of a resistive film type, a capacitive type, an optical type, an ultrasonic type, and the like, a glass plate having a touch sensor function, a transparent resin plate, and the like can be used. In the case of using a capacitive touch panel as the transparent plate, a front transparent plate formed of glass or a transparent resin plate is preferably provided on the side of the touch panel where the touch panel is visually recognized.
Examples
The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.
< example 1>
< preparation of polarizing plate >
A polyvinyl alcohol film having an average polymerization degree of 2,400, a saponification degree of 99.9 mol% and a thickness of 45 μm was prepared. The polyvinyl alcohol film was immersed between rolls having different peripheral speed ratios for 30 seconds in a swelling bath (water bath) at 20 ℃ to swell and stretched 2.4 times in the transport direction (swelling step), and then immersed in a dyeing bath (aqueous solution having an iodine concentration of 0.03 wt% and a potassium iodide concentration of 0.3 wt%) at 20 ℃ for 45 seconds to dye the film, and stretched 3.7 times in the transport direction based on the original polyvinyl alcohol film (polyvinyl alcohol film that was not stretched at all in the transport direction) (dyeing step). Next, the dyed polyvinyl alcohol film was immersed in a crosslinking bath (aqueous solution having a boric acid concentration of 3.0 wt% and a potassium iodide concentration of 3.0 wt%) at 40 ℃ for 20 seconds and stretched 4.2 times in the transport direction based on the original polyvinyl alcohol film (crosslinking step). The obtained polyvinyl alcohol film was immersed in a stretching bath (aqueous solution having a boric acid concentration of 4.0 wt% and a potassium iodide concentration of 5.0 wt%) at 65 ℃ for 50 seconds, stretched 6.0 times in the transport direction based on the original polyvinyl alcohol film (stretching step), and then immersed in a cleaning bath (aqueous solution having a potassium iodide concentration of 2.5 wt%) at 18 ℃ for 5 seconds (cleaning step). The washed polyvinyl alcohol film was dried at 30 ℃ for 2 minutes to produce a polarizing plate. The content of boron in the polarizing material was 4.2 wt% and the content of potassium in the polarizing material was 0.32 wt%, which were determined by the following measurement methods. The thickness of the polarizer was 18 μm, and the moisture percentage of the polarizer was 16 wt%.
[ method for measuring boron content (wt%) in polarizing material ]
The polarizing material (about 0.2g) dried at 120 ℃ for 2 hours was dissolved in water, and the resulting solution was added dropwise with a small amount of mannitol and BTB solution, followed by neutralization titration with a 0.1mol/L NaOH aqueous solution using a burette, and the boron content of the polarizing material was calculated based on the following equation.
The polarizing plate had a boron content (wt%) -CxV xMw/Mx100
C: concentration of NaOH aqueous solution (mol/L)
V: dropping amount (L) of NaOH aqueous solution
Mw: molecular weight of boron (g/mol)
M: weight (g) of polarizer after drying at 120 ℃ for 2 hours
[ method for measuring Potassium content (% by weight) in polarizing plate ]
The fluorescence X-ray intensity (kcps) of potassium element was measured using a fluorescence X-ray analyzer (product name "ZSX 100E" manufactured by Rigaku Corporation, measurement diameter: 10 mm). On the other hand, the thickness (. mu.m) of the polarizer was measured using a spectral film thickness meter (product name "DG-205" manufactured by PEACOCK). The potassium content (% by weight) was determined from the obtained fluorescent X-ray intensity and thickness by the following equation. The following "2.99" is a coefficient of a calibration curve derived by measuring the fluorescent X-ray intensity (kcps) of a sample (for example, a PVA-based resin film to which a certain amount of KI is added) having a known thickness (μm) and potassium concentration (wt%).
The content (weight%) of potassium in the polarizing plate was 2.99 × (fluorescence X-ray intensity of potassium element)/(thickness of polarizing plate)
< preparation of polarizing film >
As the binder, a binder was used in a weight ratio of 3: 1 an aqueous solution containing a polyvinyl alcohol resin having an acetoacetyl group (average degree of polymerization of 1,200, degree of saponification of 98.5 mol%, degree of acetoacetylation of 5 mol%) and methylolmelamine. Using the adhesive, the adhesive can be obtained by a roll laminatorA transparent protective film (saturated water absorption of 0.2 g/m) having a thickness of 30 μm and made of a (meth) acrylic resin (a modified acrylic polymer having a lactone ring structure) was bonded to one surface (image display unit-side surface) of the polarizer2The moisture permeability is 125 g/(m)224h)) (hereinafter, this film is referred to as "transparent film A") as a 2 nd transparent protective film, and a 40 μm thick cellulose triacetate film (having a moisture permeability of 342 g/(m) and having a hard coat layer (see through side) was laminated on the other side (see through side)224 hours), KONICA MINOLTA, INC., trade name "KC 4 UYW" (hereinafter, this film is referred to as "transparent film B") as a 1 st transparent protective film, and then, the film was continuously heated and dried in an oven (temperature: 88 ℃ C., time: 10 minutes) to prepare a polarizing film in which transparent protective films were bonded to both surfaces of a polarizer.
< production of simulation image display device >
The polarizing film obtained in the above was cut into a size of 150 × 50cm so that the absorption axis of the polarizer was long, a glass plate (analog image display unit) was bonded to one surface (surface on the transparent film a side) of the polarizing film via an acrylic pressure-sensitive adhesive layer having a thickness of 20 μm, and another glass plate was bonded to the other surface (surface on the transparent film B side) of the polarizing film via a pressure-sensitive adhesive (product name "lucicacs CS 9868" manufactured by ritonavir electric corporation) having a thickness of 200 μm, to produce an analog image display device.
[ evaluation of optical Properties in high temperature Environment ]
The analog image display device obtained above was left to stand in a hot air oven at a temperature of 95 ℃ for 500 hours, and the monomer transmittance (Δ Ts) and the polarization degree (Δ P) before and after charging (heating) were measured. The monomer transmittance and the degree of polarization were measured by using a spectrophotometer (DOT-3, product name, manufactured by Nikkiso K.K.; village color technology research). The monomer transmittance is a Y value obtained by correcting the visibility in accordance with a 2-degree visual field (C light source) of JlS Z8701-1982. The measurement wavelength is 380 to 700nm (per 10 nm).
ΔTs(％)＝Ts500-Ts0
ΔP(％)＝P500-P0
Here, Ts0And P0Is the monomer transmittance and polarization degree before heating, Ts500And P500The transmittance and polarization degree of the monomer after heating for 500 hours. The results are shown in Table 1.
The above-described polarization degree is defined by the following formula, based on the parallel transmittance (Tp) obtained when the analog image display device and the reference polarizing film (product name "CWQ 1463 CU" manufactured by heliographic electric corporation) are arranged in a state where the absorption axes are parallel, and the orthogonal transmittance (Tc) obtained when the films are orthogonal to each other so that the absorption axis is 90 °.
P(％)＝[(Tp-Tc)/(Tp+Tc)]1/2×100
The Δ Ts (%) is preferably-1.0 to 1.0, more preferably-0.5 to 0.5. The Δ P (%) is preferably-0.010 to 0.000, more preferably-0.005 to 0.000.
[ evaluation of appearance under high temperature Environment ]
The simulated image display device obtained above was left to stand in a hot air oven at a temperature of 95 ℃ for 500 hours, and the appearance after charging (heating) was evaluated by visual observation according to the following criteria. The results are shown in Table 1.
O: no abnormal appearance, or cracks of less than 100 μm generated at the end of the polarizing film.
X: the appearance was abnormal (polyalkylene), and cracks of 100 μm or more were generated at the ends of the polarizing film.
< example 2>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a crosslinking bath (an aqueous solution having a boric acid concentration of 3.5 wt% and a potassium iodide concentration of 2.5 wt%) was used in the crosslinking step, a stretching bath (an aqueous solution having a boric acid concentration of 4.5 wt% and a potassium iodide concentration of 5.0 wt%) was used in the stretching step, and a cleaning bath (an aqueous solution having a potassium iodide concentration of 1.8 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 5.2 wt% and a potassium content of 0.28 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
< example 3>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a stretching bath (an aqueous solution having a boric acid concentration of 3.5 wt% and a potassium iodide concentration of 5.0 wt%) was used in the stretching step, and a cleaning bath (an aqueous solution having a potassium iodide concentration of 3.0 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 4.0 wt% and a potassium content of 0.34 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
< example 4>
< production of polarizer, polarizing film, and analog image display device >
As a polarizer, the polarizer obtained in example 3 was prepared. In the production of the polarizing film, as the 2 nd transparent protective film, a cellulose triacetate film (having a moisture permeability of 560 g/(m) was used as a film having a thickness of 80 μm on one surface (image display unit side surface) of the polarizer224h), KONICA MINOLTA, INC., trade name "KC 8 UYW" (hereinafter, this film is referred to as "transparent film C"), and a polarizing film and an analog image display device were produced in the same manner as in example 1, except that these films were used.
< example 5>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a crosslinking bath (an aqueous solution having a boric acid concentration of 3.5 wt% and a potassium iodide concentration of 2.5 wt%) was used in the crosslinking step, a stretching bath (an aqueous solution having a boric acid concentration of 5.0 wt% and a potassium iodide concentration of 5.0 wt%) was used in the stretching step, and a cleaning bath (an aqueous solution having a potassium iodide concentration of 1.8 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 5.3 wt% and a potassium content of 0.28 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
< comparative example 1>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a crosslinking bath (an aqueous solution having a boric acid concentration of 2.5 wt% and a potassium iodide concentration of 2.5 wt%) was used in the crosslinking step, a stretching bath (an aqueous solution having a boric acid concentration of 3.0 wt% and a potassium iodide concentration of 5.0 wt%) was used in the stretching step, and a cleaning bath (an aqueous solution having a potassium iodide concentration of 4.0 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 3.9 wt% and a potassium content of 0.36 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
< comparative example 2>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a cleaning bath (an aqueous solution having a potassium iodide concentration of 1.3 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 4.1 wt% and a potassium content of 0.27 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
< comparative example 3>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a stretching bath (an aqueous solution having a boric acid concentration of 3.5 wt% and a potassium iodide concentration of 5.0 wt%) was used in the stretching step, and a cleaning bath (an aqueous solution having a potassium iodide concentration of 1.5 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 4.0 wt% and a potassium content of 0.28 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
< comparative example 4>
< production of polarizer, polarizing film, and analog image display device >
A polarizer was produced in the same manner as in example 1, except that a crosslinking bath (an aqueous solution having a boric acid concentration of 1.5 wt% and a potassium iodide concentration of 2.5 wt%) was used in the crosslinking step, a stretching bath (an aqueous solution having a boric acid concentration of 1.5 wt% and a potassium iodide concentration of 5.0 wt%) was used in the stretching step, and a cleaning bath (an aqueous solution having a potassium iodide concentration of 10.0 wt%) was used in the cleaning step. The obtained polarizing plate had a boron content of 2.4 wt% and a potassium content of 0.65 wt%. Using the obtained polarizer, a polarizing film and an analog image display device were produced in the same manner as in example 1.
The simulated image display devices of examples 2 to 5 and comparative examples 1 to 4 obtained above were used to perform the evaluation in [ evaluation of optical properties in a high-temperature environment ] and [ evaluation of appearance in a high-temperature environment ] described above. The results are shown in Table 1.
[ Table 1]
Claims (8)
1. A polarizing plate comprising a polyvinyl alcohol film,
the polarizer includes boron and potassium,
the polarizing plate has a boron content of 4 wt% or more and 6 wt% or less, and a value obtained by multiplying the boron content (% by weight) by the potassium content (% by weight) is 1.2 or more.
2. A light polarizer according to claim 1, wherein the potassium is contained in an amount of 0.28 wt% or more.
3. A polarizer according to claim 1 or 2, wherein the content of boron is 5.2 wt% or less.
4. A polarizing film comprising the polarizing device according to any one of claims 1 to 3 and a transparent protective film bonded to at least one surface of the polarizing device.
5. A polarizing film as claimed in claim 4, wherein the transparent protective film has a moisture permeability of 200 g/(m)224h) or less.
6. A laminated polarizing film, wherein the polarizing film according to claim 4 or 5 is bonded to an optical layer.
7. An image display panel, wherein the polarizing film according to claim 4 or 5 or the laminated polarizing film according to claim 6 is bonded to an image display unit.
8. An image display device comprising a transparent plate on the polarizing film or laminated polarizing film side of the image display panel according to claim 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310236094.1A CN118091813A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
| CN202310236074.4A CN117518324A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-062076 | 2018-03-28 | ||
| JP2018062076 | 2018-03-28 | ||
| PCT/JP2019/012078 WO2019188779A1 (en) | 2018-03-28 | 2019-03-22 | Polarizer, polarizing film, multilayer polarizing film, image display panel and image display device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310236074.4A Division CN117518324A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
| CN202310236094.1A Division CN118091813A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
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| CN111919149A true CN111919149A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201980022317.6A Pending CN111919149A (en) | 2018-03-28 | 2019-03-22 | Polarizer, polarizing film, laminated polarizing film, image display panel, and image display device |
| CN202310236094.1A Pending CN118091813A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
| CN202310236074.4A Pending CN117518324A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
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| CN202310236094.1A Pending CN118091813A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
| CN202310236074.4A Pending CN117518324A (en) | 2018-03-28 | 2019-03-22 | Polarizing material, polarizing film, laminated polarizing film, image display panel, and image display device |
Country Status (4)
| Country | Link |
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| JP (3) | JP6917521B2 (en) |
| KR (4) | KR20230131971A (en) |
| CN (3) | CN111919149A (en) |
| WO (1) | WO2019188779A1 (en) |
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| JP2021165826A (en) * | 2020-04-01 | 2021-10-14 | 住友化学株式会社 | Polarizer and image display unit using the polarizer |
| CN115427852A (en) * | 2020-06-12 | 2022-12-02 | 住友化学株式会社 | Polarizing film and elliptical polarizing plate |
| TW202221366A (en) | 2020-10-15 | 2022-06-01 | 日商住友化學股份有限公司 | Polarizing plate and image display device |
| JP7089093B2 (en) * | 2020-10-15 | 2022-06-21 | 住友化学株式会社 | Polarizing plate and image display device |
| JP7005803B1 (en) | 2020-10-26 | 2022-01-24 | 住友化学株式会社 | Laminate |
| JP2022074422A (en) * | 2020-11-04 | 2022-05-18 | 住友化学株式会社 | Polarizing plate and image display device |
| KR20230148329A (en) | 2021-03-01 | 2023-10-24 | 닛토덴코 가부시키가이샤 | Polarizing film, polarizing film, image display panel, and image display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001166143A (en) * | 1999-12-09 | 2001-06-22 | Sumitomo Chem Co Ltd | Polarizing film |
| KR20100134961A (en) * | 2009-06-16 | 2010-12-24 | 동우 화인켐 주식회사 | Polarizer, preparing method thereof, polarizing plate and image display device comprising the same |
| CN103135160A (en) * | 2011-12-02 | 2013-06-05 | 第一毛织株式会社 | Polarizer having high durability and method of fabricating the same |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09243823A (en) * | 1996-03-07 | 1997-09-19 | Nippon Synthetic Chem Ind Co Ltd:The | Production of polarizing film |
| US8031296B2 (en) * | 2006-04-05 | 2011-10-04 | Nitto Denko Corporation | Liquid crystal panel and liquid crystal display apparatus |
| TWI465781B (en) * | 2007-09-12 | 2014-12-21 | Sumitomo Chemical Co | A polarized film, a method for producing a polarized film, and a method for producing polarizer |
| US20120236408A1 (en) * | 2009-01-30 | 2012-09-20 | Ki-Ok Kwon | Outstandingly durable and heat-resistant polarising element, polarising plate and image-display device, and polarising-element production method |
| JP2012203002A (en) * | 2011-03-23 | 2012-10-22 | Nitto Denko Corp | Polarizer and manufacturing method thereof |
| JP6610020B2 (en) * | 2014-06-23 | 2019-11-27 | 三菱ケミカル株式会社 | Manufacturing method of polarizing film and manufacturing method of polarizing plate |
| TWI686630B (en) * | 2014-10-08 | 2020-03-01 | 日商可樂麗股份有限公司 | Polarizing film and its manufacturing method |
| KR20160043765A (en) * | 2014-10-14 | 2016-04-22 | 스미또모 가가꾸 가부시키가이샤 | Polarizer and preparing method thereof |
| KR20160146540A (en) * | 2015-06-12 | 2016-12-21 | 스미또모 가가꾸 가부시키가이샤 | Polarizing film and polarizing plate comprising the same |
| JP2017003954A (en) * | 2015-06-12 | 2017-01-05 | 住友化学株式会社 | Polarizing film and polarizing plate including the same |
| JP6794106B2 (en) * | 2015-12-07 | 2020-12-02 | 住友化学株式会社 | Method of manufacturing polarizing film |
| WO2017110342A1 (en) * | 2015-12-24 | 2017-06-29 | コニカミノルタ株式会社 | Polarizing plate protective film, production method for same, and polarizing plate |
| JP6868344B2 (en) * | 2016-04-20 | 2021-05-12 | 日東電工株式会社 | Polarizing film and its manufacturing method, optical film and image display device |
-
2019
- 2019-03-22 KR KR1020237030536A patent/KR20230131971A/en not_active Application Discontinuation
- 2019-03-22 WO PCT/JP2019/012078 patent/WO2019188779A1/en active Application Filing
- 2019-03-22 JP JP2020509959A patent/JP6917521B2/en active Active
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001166143A (en) * | 1999-12-09 | 2001-06-22 | Sumitomo Chem Co Ltd | Polarizing film |
| KR20100134961A (en) * | 2009-06-16 | 2010-12-24 | 동우 화인켐 주식회사 | Polarizer, preparing method thereof, polarizing plate and image display device comprising the same |
| CN103135160A (en) * | 2011-12-02 | 2013-06-05 | 第一毛织株式会社 | Polarizer having high durability and method of fabricating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019188779A1 (en) | 2020-12-17 |
| JP2021185414A (en) | 2021-12-09 |
| CN118091813A (en) | 2024-05-28 |
| KR20230131971A (en) | 2023-09-14 |
| KR20200139665A (en) | 2020-12-14 |
| JP2021185415A (en) | 2021-12-09 |
| KR20220015508A (en) | 2022-02-08 |
| KR20220015509A (en) | 2022-02-08 |
| WO2019188779A1 (en) | 2019-10-03 |
| JP6917521B2 (en) | 2021-08-11 |
| KR102600802B1 (en) | 2023-11-10 |
| KR102496903B1 (en) | 2023-02-08 |
| KR102565143B1 (en) | 2023-08-09 |
| JP6985555B2 (en) | 2021-12-22 |
| CN117518324A (en) | 2024-02-06 |
| JP6985556B2 (en) | 2021-12-22 |
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