WO2017149909A1 - Plaque de polarisation - Google Patents

Plaque de polarisation Download PDF

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Publication number
WO2017149909A1
WO2017149909A1 PCT/JP2016/088101 JP2016088101W WO2017149909A1 WO 2017149909 A1 WO2017149909 A1 WO 2017149909A1 JP 2016088101 W JP2016088101 W JP 2016088101W WO 2017149909 A1 WO2017149909 A1 WO 2017149909A1
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Prior art keywords
film
stretching
polarizing plate
resin substrate
pva
Prior art date
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PCT/JP2016/088101
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English (en)
Japanese (ja)
Inventor
大介 濱本
Original Assignee
日東電工株式会社
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Filing date
Publication date
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to KR1020187025235A priority Critical patent/KR102219988B1/ko
Priority to KR1020207005307A priority patent/KR20200022539A/ko
Priority to CN201680083155.3A priority patent/CN108780172B/zh
Priority to SG11201807351UA priority patent/SG11201807351UA/en
Publication of WO2017149909A1 publication Critical patent/WO2017149909A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0073—Optical laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00865—Applying coatings; tinting; colouring
    • B29D11/00894—Applying coatings; tinting; colouring colouring or tinting
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D129/00—Coating compositions based on 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; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a polarizing plate.
  • a method has been proposed in which a polarizing film is obtained by forming a polyvinyl alcohol-based resin layer on a resin substrate and stretching and dyeing the laminate (for example, Patent Document 1). According to such a method, a polarizing film having a small thickness can be obtained, and thus, for example, it has been attracting attention as being able to contribute to the thinning of the image display device.
  • the polarizing film can be used as it is laminated on the resin substrate (Patent Document 2).
  • Patent Document 2 since a crack may occur in the polarizing plate, improvement in durability is required.
  • JP 2000-338329 A Japanese Patent No. 4997833
  • the present invention has been made in order to solve the above problems, and its main purpose is a polarizing plate that can be used while the polarizing film is laminated on the resin base material, and has improved durability. It is to provide a polarizing plate.
  • the polarizing plate which has a polyester-type resin base material and the polarizing film laminated
  • the crystallinity calculated by the total reflection attenuation spectroscopy (ATR) measurement of the polyester-based resin substrate is 0.55 to 0.80, and the boric acid concentration in the polarizing film Is 10% to 20% by weight.
  • the polyester-based resin is polyethylene terephthalate or a copolymer thereof.
  • the polarizing film is laminated on one side of the polyester resin base material without an adhesive layer.
  • the polarizing plate does not have a protective film on the side of the polarizing film opposite to the side on which the polyester resin substrate is laminated. In one embodiment, the polarizing plate has an easy-adhesion layer between the polyester resin substrate and the polarizing film.
  • the manufacturing method of the said polarizing plate is provided. The production method includes forming a polyvinyl alcohol resin film on a polyester resin base material to produce a laminate, stretching the laminate, dyeing the polyvinyl alcohol resin film, and Crystallizing the polyester resin substrate.
  • the crystallinity of the resin substrate and boric acid in the polarizing film By adjusting the concentration within a specific range, it is possible to obtain a polarizing plate that can be used while the polarizing film is laminated on the resin base material and is excellent in durability.
  • (A) And (b) is a schematic sectional drawing of the polarizing plate in one embodiment of this invention, respectively.
  • the polarizing plate of the present invention has a polyester resin substrate and a polarizing film having a thickness of 10 ⁇ m or less laminated on one side of the polyester resin substrate.
  • Fig.1 (a) is a schematic sectional drawing of the polarizing plate in one Embodiment of this invention.
  • the polarizing plate 10a includes a polyester-based resin base material 11 and a polarizing film 12 stacked in close contact with one surface of the polyester-based resin base material 11 (in other words, without an adhesive layer).
  • FIG.1 (b) is a schematic sectional drawing of the polarizing plate in another embodiment of this invention.
  • the polarizing plate 10 b further includes a protective film 13.
  • the protective film 13 is arrange
  • the protective film 13 may be laminated on the polarizing film 12 via an adhesive layer, or may be laminated in close contact (without an adhesive layer).
  • the polyester resin substrate 11 can function as a protective film.
  • the polarizing plates 10a and 10b may have an easy-adhesion layer (not shown) between the polyester resin substrate 11 and the polarizing film 12.
  • the “perpendicular direction” includes a case of 90 ° ⁇ 5.0 °, preferably 90 ° ⁇ 3.0 °, more preferably 90 ° ⁇ 1.0 °. is there.
  • the “parallel direction” includes the case of 0 ° ⁇ 5.0 °, preferably 0 ° ⁇ 3.0 °, more preferably 0 ° ⁇ 1.0 °.
  • the polarizing film is substantially a PVA resin film in which iodine is adsorbed and oriented.
  • the thickness of the polarizing film is 10 ⁇ m or less, preferably 7.5 ⁇ m or less, more preferably 5 ⁇ m or less.
  • the thickness of the polarizing film is preferably 0.5 ⁇ m or more, more preferably 1.5 ⁇ m or more. If the thickness is too thin, the optical properties of the obtained polarizing film may be deteriorated.
  • the polarizing film preferably exhibits absorption dichroism at any wavelength of 380 nm to 780 nm.
  • the single transmittance of the polarizing film is preferably 40.0% or more, more preferably 41.0% or more, and further preferably 42.0% or more.
  • the polarization degree of the polarizing film is preferably 99.8% or more, more preferably 99.9% or more, and further preferably 99.95% or more.
  • any appropriate resin can be adopted as the PVA resin for forming the PVA resin film.
  • Examples thereof include polyvinyl alcohol and ethylene-vinyl alcohol copolymer.
  • Polyvinyl alcohol is obtained by saponifying polyvinyl acetate.
  • the ethylene-vinyl alcohol copolymer can be obtained by saponifying an ethylene-vinyl acetate copolymer.
  • the degree of saponification of the PVA-based resin is usually 85 mol% to 100 mol%, preferably 95.0 mol% to 99.95 mol%, more preferably 99.0 mol% to 99.93 mol%. .
  • the degree of saponification can be determined according to JIS K 6726-1994. By using a PVA-based resin having such a saponification degree, a polarizing film having excellent durability can be obtained. If the degree of saponification is too high, there is a risk of gelation.
  • the boric acid concentration in the polarizing film is, for example, changing the boric acid concentration in a stretching bath, an insolubilizing bath, a cross-linking bath, etc., and changing the immersion time in these baths, etc. Can be adjusted.
  • the boric acid concentration (% by weight) in the polarizing film can be determined using, for example, a boric acid amount index calculated from total reflection attenuation spectroscopy (ATR) measurement.
  • the glass transition temperature (Tg) of the polyester resin substrate is preferably 170 ° C. or lower.
  • Tg glass transition temperature
  • the glass transition temperature of the polyester resin substrate is preferably 60 ° C. or higher.
  • the laminate can be stretched at a suitable temperature (eg, about 60 ° C. to 70 ° C.).
  • a glass transition temperature lower than 60 ° C. may be used as long as the polyester resin base material is not deformed when applying and drying a coating solution containing a PVA resin.
  • the glass transition temperature (Tg) is a value determined according to JIS K 7121.
  • the polyester resin base material preferably has a water absorption rate of 0.2% or more, and more preferably 0.3% or more.
  • a polyester resin base material absorbs water, and the water can act as a plasticizer to be plasticized.
  • the stretching stress can be greatly reduced in stretching in water, and the stretchability can be excellent.
  • the water absorption rate of the polyester resin substrate is preferably 3.0% or less, more preferably 1.0% or less.
  • the degree of crystallinity calculated by measuring total reflection attenuation (ATR) of the polyester resin substrate is 0.55 to 0.80, preferably 0.58 to 0.80, and more preferably 0.60 to 0.8. 75.
  • ATR total reflection attenuation
  • the difference between the dimensional change rate of the polarizing film in the direction of the absorption axis and the dimensional change rate of the polyester resin base material is such that the dimensional change rate of the polarizing film in the direction orthogonal to the absorption axis and the polyester resin It can prevent becoming large compared with the difference with the dimensional change rate of a base material.
  • the degree of crystallization of the polyester resin substrate can be adjusted, for example, by changing the heating temperature and / or the heating time for crystallization.
  • the crystallinity degree of the said polyester-type resin base material is computed based on the following formula
  • equation. (Crystallinity) (Intensity of crystal peak 1340 cm ⁇ 1 ) / (Intensity of reference peak 1410 cm ⁇ 1 )
  • Protective film examples of the material for forming the protective film include (meth) acrylic resins, cellulose resins such as diacetyl cellulose and triacetyl cellulose, cycloolefin resins, olefin resins such as polypropylene, and polyethylene terephthalate resins. Examples thereof include ester resins, polyamide resins, polycarbonate resins, and copolymer resins thereof.
  • the thickness of the protective film is preferably 10 ⁇ m to 100 ⁇ m.
  • the easy-adhesion layer may be a layer formed substantially only from the composition for forming an easy-adhesion layer, and the composition for forming an easy-adhesion layer and the material for forming the polarizing film are mixed (compatible). A layer or region that is included). By forming the easy adhesion layer, excellent adhesion can be obtained.
  • the thickness of the easy adhesion layer is preferably about 0.05 ⁇ m to 1 ⁇ m.
  • the easy adhesion layer can be confirmed, for example, by observing the cross section of the polarizing plate with a scanning electron microscope (SEM).
  • SEM scanning electron microscope
  • Adhesive layer is formed of any suitable adhesive or adhesive.
  • the pressure-sensitive adhesive layer is typically formed of an acrylic pressure-sensitive adhesive.
  • the adhesive layer is typically formed of a vinyl alcohol adhesive.
  • the production method of the polarizing plate of the present invention typically comprises forming a PVA resin film on a polyester resin substrate to produce a laminate, and stretching the laminate. And dyeing the PVA resin film, and crystallizing the polyester resin substrate.
  • a PVA-based resin film is formed by applying a coating liquid containing a PVA-based resin on a polyester-based resin base material and drying it.
  • an easy-adhesion layer forming composition is applied on a polyester-based resin substrate and dried to form an easy-adhesion layer, and a PVA-based resin film is formed on the easy-adhesion layer To do.
  • the forming material of the polyester resin base material is as described above.
  • the thickness of the polyester resin substrate is preferably 20 ⁇ m to 300 ⁇ m, more preferably 50 ⁇ m to 200 ⁇ m. If it is less than 20 ⁇ m, it may be difficult to form a PVA resin film. If it exceeds 300 ⁇ m, for example, in stretching in water, it takes a long time for the polyester-based resin substrate to absorb water, and an excessive load may be required for stretching.
  • the degree of crystallinity calculated by the total reflection attenuation spectroscopy (ATR) measurement of the polyester-based resin substrate when used for the production of the laminate may be, for example, 0.20 to 0.50.
  • the coating solution is typically a solution obtained by dissolving the PVA resin in a solvent.
  • the solvent include water, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, various glycols, polyhydric alcohols such as trimethylolpropane, and amines such as ethylenediamine and diethylenetriamine. These may be used alone or in combination of two or more. Among these, water is preferable.
  • the concentration of the PVA resin in the solution is preferably 3 to 20 parts by weight with respect to 100 parts by weight of the solvent. With such a resin concentration, a uniform coating film in close contact with the polyester resin substrate can be formed.
  • Additives may be added to the coating solution.
  • the additive include a plasticizer and a surfactant.
  • the plasticizer include polyhydric alcohols such as ethylene glycol and glycerin.
  • the surfactant include nonionic surfactants. These can be used for the purpose of further improving the uniformity, dyeability and stretchability of the resulting PVA resin film.
  • an easily bonding component is mentioned, for example. By using the easy-adhesion component, the adhesion between the polyester resin substrate and the PVA resin film can be improved. As a result, for example, problems such as peeling of the PVA-based resin film from the substrate can be suppressed, and dyeing and underwater stretching described later can be performed satisfactorily.
  • modified PVA such as acetoacetyl-modified PVA is used.
  • the coating / drying temperature of the coating solution is preferably 50 ° C. or higher.
  • the thickness of the PVA resin film is preferably 3 ⁇ m to 20 ⁇ m.
  • the polyester-based resin substrate Before forming the PVA-based resin film, the polyester-based resin substrate may be subjected to a surface treatment (for example, corona treatment), or an easy-adhesion layer-forming composition is applied onto the polyester-based resin substrate (coating) Processing).
  • a surface treatment for example, corona treatment
  • an easy-adhesion layer-forming composition is applied onto the polyester-based resin substrate (coating) Processing.
  • the easy-adhesion layer-forming composition preferably contains a polyvinyl alcohol-based component.
  • Any appropriate PVA-based resin can be used as the polyvinyl alcohol-based component.
  • Specific examples include polyvinyl alcohol and modified polyvinyl alcohol.
  • the modified polyvinyl alcohol include polyvinyl alcohol modified with an acetoacetyl group, a carboxylic acid group, an acrylic group and / or a urethane group.
  • acetoacetyl-modified PVA is preferably used.
  • a polymer having at least a repeating unit represented by the following general formula (I) is preferably used as the acetoacetyl-modified PVA.
  • the easy-adhesion layer-forming composition may further contain a polyolefin-based component, a polyester-based component, a polyacrylic-based component, or the like depending on the purpose.
  • the easily adhesive layer forming composition further includes a polyolefin-based component.
  • the proportion of the olefin component in the monomer component constituting the polyolefin resin is preferably 50% by weight to 95% by weight.
  • the blending ratio of the polyvinyl alcohol component to the polyolefin component is preferably 5:95 to 60:40, more preferably 20:80 to 50. : 50.
  • the peeling force required when peeling the polarizing film from the resin base material may be reduced, and sufficient adhesion may not be obtained.
  • the external appearance of the polarizing plate obtained may be impaired.
  • the easy-adhesion layer is formed, a problem such as white turbidity of the coating film may occur, which may make it difficult to obtain a polarizing plate having an excellent appearance.
  • the stretching treatment may be an underwater stretching method performed by immersing the laminate in a stretching bath, or an air stretching method.
  • the underwater stretching treatment is performed at least once, and preferably the underwater stretching treatment and the air stretching treatment are combined.
  • the polyester resin substrate or PVA resin film can be stretched at a temperature lower than the glass transition temperature (typically about 80 ° C.), and the PVA resin film is crystallized. While suppressing, it can be stretched at a high magnification. As a result, a polarizing film having excellent polarization characteristics can be manufactured.
  • the stretching temperature of the laminate can be set to any appropriate value depending on the forming material of the polyester resin substrate, the stretching method, and the like.
  • the stretching temperature is preferably equal to or higher than the glass transition temperature (Tg) of the polyester-based resin base material, more preferably the glass transition temperature (Tg) of the polyester-based resin base material + 10 ° C. or higher.
  • Tg glass transition temperature
  • the stretching temperature of the laminate is preferably 170 ° C. or lower.
  • the liquid temperature of the stretching bath is preferably 40 ° C. to 85 ° C., more preferably 50 ° C. to 85 ° C. If it is such temperature, it can extend
  • the glass transition temperature (Tg) of the polyester-based resin substrate is preferably 60 ° C. or higher in relation to the formation of the PVA-based resin film.
  • the stretching temperature is lower than 40 ° C., there is a possibility that the stretching cannot be satisfactorily performed even in consideration of plasticization of the polyester-based resin substrate with water.
  • the higher the temperature of the stretching bath the higher the solubility of the PVA-based resin film, and there is a possibility that excellent polarization characteristics cannot be obtained.
  • the boric acid aqueous solution is preferably obtained by dissolving boric acid and / or borate in water as a solvent.
  • the boric acid concentration is preferably 1 to 10 parts by weight with respect to 100 parts by weight of water. By setting the boric acid concentration to 1 part by weight or more, dissolution of the PVA-based resin film can be effectively suppressed, and a polarizing film having higher characteristics can be produced.
  • an aqueous solution obtained by dissolving a boron compound such as borax, glyoxal, glutaraldehyde, or the like in a solvent can also be used.
  • iodide is blended in the stretching bath (boric acid aqueous solution).
  • the iodide include potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, and titanium iodide.
  • potassium iodide is preferable.
  • the concentration of iodide is preferably 0.05 to 15 parts by weight, more preferably 0.5 to 8 parts by weight with respect to 100 parts by weight of water.
  • the immersion time of the laminate in the stretching bath is preferably 15 seconds to 5 minutes.
  • the underwater stretching process is performed after the dyeing process.
  • the draw ratio (maximum draw ratio) of the laminate is preferably 4.0 times or more, more preferably 5.0 times or more with respect to the original length of the laminate. Such a high draw ratio can be achieved, for example, by employing an underwater drawing method (boric acid underwater drawing).
  • the “maximum stretch ratio” refers to a stretch ratio immediately before the laminate is ruptured. Separately, a stretch ratio at which the laminate is ruptured is confirmed, and a value that is 0.2 lower than that value. .
  • the dyeing of the PVA resin film is typically performed by adsorbing iodine to the PVA resin film.
  • adsorption method for example, a method of immersing a PVA resin film (laminated body) in a staining solution containing iodine, a method of applying the staining solution to the PVA resin film, and applying the staining solution to the PVA resin film The method of spraying etc. are mentioned.
  • the PVA resin film (laminate) is immersed in the dyeing solution. This is because iodine can be adsorbed well.
  • the immersion time is preferably 5 seconds to 5 minutes in order to ensure the transmittance of the PVA resin film.
  • the staining conditions concentration, liquid temperature, immersion time
  • immersion time is set so that the polarization degree of the polarizing film obtained may be 99.98% or more.
  • the immersion time is set so that the obtained polarizing film has a single transmittance of 40% to 44%.
  • the staining process can be performed at any appropriate timing.
  • it performs before an underwater extending
  • Crystallization of the polyester-based resin substrate is performed, for example, by heating the polyester-based resin substrate (substantially a laminate). Crystallization is preferably performed after dyeing and stretching the PVA resin film.
  • the heating temperature is typically a temperature that exceeds the glass transition temperature (Tg) of the polyester resin substrate.
  • the heating temperature is preferably 90 ° C. or higher, more preferably 100 ° C. or higher.
  • the heating temperature is preferably 125 ° C. or lower, more preferably 120 ° C. or lower.
  • the heating time can be appropriately set according to the heating temperature and the like. The heating time can be, for example, 3 seconds to 2 minutes.
  • the crystallization it is preferable to perform the crystallization so that the haze value of the polyester-based resin substrate is 2% or less.
  • the PVA-based resin film may be appropriately subjected to treatment for forming a polarizing film.
  • the treatment for forming the polarizing film include insolubilization treatment, crosslinking treatment, washing treatment, and drying treatment.
  • count, order, etc. of these processes are not specifically limited.
  • the insolubilization treatment is typically performed by immersing a PVA resin film (laminate) in a boric acid aqueous solution.
  • a boric acid aqueous solution By performing the insolubilization treatment, water resistance can be imparted to the PVA resin film.
  • the concentration of the boric acid aqueous solution is preferably 1 to 4 parts by weight with respect to 100 parts by weight of water.
  • the liquid temperature of the insolubilizing bath (boric acid aqueous solution) is preferably 20 ° C. to 50 ° C.
  • the insolubilization treatment is performed before the above-described underwater stretching or the above-described dyeing treatment.
  • the cross-linking treatment is typically performed by immersing a PVA resin film (laminate) in an aqueous boric acid solution.
  • the concentration of the boric acid aqueous solution is preferably 1 to 5 parts by weight with respect to 100 parts by weight of water.
  • blend an iodide it is preferable to mix
  • the blending amount of iodide is preferably 1 to 5 parts by weight with respect to 100 parts by weight of water.
  • the above-described cleaning treatment is typically performed by immersing a PVA resin film (laminated body) in a potassium iodide aqueous solution.
  • the drying temperature in the drying treatment is preferably 30 ° C. to 100 ° C.
  • the polarizing plate of the present invention can be obtained by forming a polarizing film on a polyester resin substrate and crystallizing the polyester resin substrate.
  • the polarizing plate of the present invention can be mounted on, for example, a liquid crystal display device.
  • the polarizing film is mounted so as to be disposed closer to the liquid crystal cell than the polyester resin substrate. According to such a structure, the influence which the phase difference which a polyester-type resin base material can have on the image characteristic of the liquid crystal display device obtained can be excluded.
  • Example 6 After the temperature was raised in minutes, the dimensional change rate was further measured when held at 100 ° C. for 60 minutes.
  • the polarizing film and the resin substrate were isolated in the same procedure from the polarizing plate prepared in the same manner except that the easy-adhesion layer was not formed. The dimensional change of the polarizing film and the resin base material was used.
  • Dimensional change rate (%) (Dimension after heat treatment ⁇ Dimension before heat treatment) / Dimension before heat treatment ⁇ 100 ⁇ Crystallinity ⁇
  • the polyester-based resin base materials obtained in the examples and comparative examples were subjected to total reflection attenuation spectroscopy (ATR) using a Fourier transform infrared spectrophotometer (FT-IR) (manufactured by Perkin Elmer, trade name “SPECTRUM2000”).
  • FT-IR Fourier transform infrared spectrophotometer
  • the intensity of the crystal peak (1340 cm ⁇ 1 ) and the intensity of the reference peak (1410 cm ⁇ 1 ) were measured by measurement.
  • the crystallinity was calculated by the following formula from the obtained crystal peak intensity and reference peak intensity.
  • (Crystallinity) (Intensity of crystal peak 1340 cm ⁇ 1 ) / (Intensity of reference peak 1410 cm ⁇ 1 ) ⁇ Glass transition temperature: Tg ⁇ Measured according to JIS K 7121. ⁇ Boric acid concentration ⁇ Using the Fourier transform infrared spectrophotometer (FT-IR) (manufactured by Perkin Elmer, trade name “SPECTRUM2000”) for the polarizing films obtained in Examples and Comparative Examples, total reflection attenuation using polarized light as measurement light The intensity of the boric acid peak (665 cm ⁇ 1 ) and the intensity of the reference peak (2941 cm ⁇ 1 ) were measured by spectroscopic (ATR) measurement.
  • FT-IR Fourier transform infrared spectrophotometer
  • the boric acid amount index was calculated from the obtained boric acid peak intensity and the reference peak intensity by the following formula, and the boric acid concentration was determined from the calculated boric acid amount index by the following formula.
  • (Boric acid amount index) (Intensity of boric acid peak 665 cm ⁇ 1 ) / (Intensity of reference peak 2941 cm ⁇ 1 )
  • (Boric acid concentration) (Boric acid amount index) ⁇ 5.54 + 4.1 ⁇ Crack evaluation ⁇
  • the polarizing plates obtained in the examples and comparative examples were heated in an oven at 100 ° C. for 240 hours in a state of being bonded to glass through an adhesive so that the polyester resin substrate was on the surface side. The presence or absence of cracks in the polarizing plate after heating was confirmed and evaluated according to the following criteria. Good: No cracking Defect: There is a crack
  • a boric acid aqueous solution obtained by blending 3 parts by weight of potassium iodide and 3 parts by weight of boric acid with respect to 100 parts by weight of water was immersed for 30 seconds in a crosslinking bath having a liquid temperature of 30 ° C.
  • a boric acid aqueous solution obtained by blending 3 parts by weight of potassium iodide and 3 parts by weight of boric acid with respect to 100 parts by weight of water (Crosslinking treatment).
  • the laminate is immersed in a boric acid aqueous solution (an aqueous solution obtained by blending 3 parts by weight of boric acid and 5 parts by weight of potassium iodide with respect to 100 parts by weight of water) at a liquid temperature of 70 ° C.
  • Example 2 A polarizing plate was obtained in the same manner as in Example 1 except that the laminate was placed in an oven at 110 ° C. for 30 seconds to crystallize the resin substrate.
  • Example 4 Example 1 except that the amount of boric acid in the stretching bath during stretching in water was 3.5 parts by weight, and the laminate was put into an oven at 110 ° C. for 30 seconds to crystallize the resin substrate. In the same manner, a polarizing plate was obtained.
  • Example 5 Example 1 except that the amount of boric acid in the stretching bath during stretching in water was 2.5 parts by weight, and the laminate was put into an oven at 110 ° C. for 30 seconds to crystallize the resin substrate. In the same manner, a polarizing plate was obtained.
  • the easy adhesion layer was provided on one side of the resin base material by the following method.
  • One side of the resin base material is subjected to corona treatment, and this corona treatment surface is subjected to acetoacetyl-modified PVA (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name “Gosefimer Z200”, polymerization degree 1200, saponification degree 99.0 mol. %, Acetoacetyl modification degree 4.6%) and a modified polyolefin resin aqueous dispersion (manufactured by Unitika Ltd., trade name “Arrow Base SE1030N”, solid content concentration 22%) and pure water were mixed.
  • Example 1 A polarizing plate was obtained in the same manner as in Example 1 except that the laminate was placed in an oven at 85 ° C. for 30 seconds to crystallize the resin substrate.
  • Example 3 A polarizing plate was obtained in the same manner as in Example 1 except that the laminate was put in an oven at 95 ° C. for 30 seconds to crystallize the resin substrate.
  • the polarizing plate of the example having the resin base material having a specific crystallinity and the polarizing film satisfying the specific boric acid concentration occurrence of cracks is suppressed.
  • the polarizing plate of the comparative example is cracked and inferior in durability to the polarizing plate of the example.
  • the polarizing plate of Example 6 is superior in adhesion between the resin base material and the polarizing film (PVA-based resin layer) as compared to the polarizing plates of other examples or comparative examples. Further, undesired peeling or floating of the polarizing film (PVA resin layer) or the resin base material during processing of the polarizing plate (for example, punching) was suitably prevented.
  • the reason why the occurrence of cracks in the polarizing plate of the example was suppressed is estimated as follows. That is, in the polarizing plate of the example, the difference between the dimensional change rate of the resin base material and the dimensional change rate of the polarizing film in the MD direction (dimensional change rate of the resin base material ⁇ dimensional change rate of the polarizing film) and in the TD direction.
  • the difference between the dimensional change rate of the resin substrate and the dimensional change rate of the polarizing film is within 5%, and the dimensional change rate in the TD direction.
  • Difference (absolute value) is close to the difference (absolute value) in the dimensional change rate in the MD direction (within ⁇ 1.5%). Since the polarizing film is oriented in the stretching direction (MD), the mechanical properties tend to be weak in the direction (TD) orthogonal to the stretching direction. Therefore, by making the difference (absolute value) of the dimensional change rate in the TD direction close to the difference (absolute value) of the dimensional change rate in the MD direction, the occurrence of cracks is suppressed without biasing the strain in the TD direction. It is thought.
  • the polarizing plate of the present invention is suitably used for an image display device, for example.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Polarising Elements (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une plaque de polarisation qui a une durabilité améliorée et qui peut être utilisée telle quelle dans un état dans lequel un film polarisant est déposé sur un substrat de résine. Cette plaque de polarisation comprend un substrat de résine de polyester et un film polarisant qui est stratifié sur un côté du substrat de résine de polyester et qui a une épaisseur de 10 µm ou moins. Le degré de cristallinité du substrat de résine de polyester, tel que calculé par spectrométrie par réflexion totale atténuée, est compris entre 0,55 et 0,80, et la concentration d'acide borique dans le film polarisant est comprise entre 10 % et 20 % en poids.
PCT/JP2016/088101 2016-03-04 2016-12-21 Plaque de polarisation WO2017149909A1 (fr)

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KR1020187025235A KR102219988B1 (ko) 2016-03-04 2016-12-21 편광판
KR1020207005307A KR20200022539A (ko) 2016-03-04 2016-12-21 편광판
CN201680083155.3A CN108780172B (zh) 2016-03-04 2016-12-21 偏振片
SG11201807351UA SG11201807351UA (en) 2016-03-04 2016-12-21 Polarizing plate

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JP2016-042098 2016-03-04
JP2016042098A JP6893762B2 (ja) 2016-03-04 2016-03-04 偏光板

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SG (1) SG11201807351UA (fr)
TW (1) TWI645223B (fr)
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019069757A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image, et procédé de production de plaque polarisante
WO2019069756A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image et procédé de production de plaque polarisante
WO2019069755A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image et procédé de production de plaque polarisante
WO2019069754A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image et procédé de production de plaque polarisante
WO2019112020A1 (fr) * 2017-12-06 2019-06-13 大日本印刷株式会社 Matériau d'enveloppe pour batterie, batterie, procédés de fabrication de ce matériau d'enveloppe et de cette batterie, et film polyester
CN112840246A (zh) * 2018-10-15 2021-05-25 日东电工株式会社 带相位差层的偏光板及使用其的图像显示装置
CN112840248A (zh) * 2018-10-15 2021-05-25 日东电工株式会社 带相位差层的偏光板及使用其的图像显示装置
CN113366352A (zh) * 2019-01-31 2021-09-07 日东电工株式会社 聚酯薄膜、及包含该聚酯薄膜的偏光板
JP7392715B2 (ja) 2019-04-18 2023-12-06 東洋紡株式会社 ポリエステル系シーラントフィルムおよびそれを用いた包装体

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021157068A (ja) * 2020-03-27 2021-10-07 日東電工株式会社 ポリエステルフィルム、および該ポリエステルフィルムを含む偏光板

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4979833B1 (ja) * 2010-12-02 2012-07-18 日東電工株式会社 偏光板の製造方法
JP2013122518A (ja) * 2011-12-12 2013-06-20 Nitto Denko Corp 偏光膜の製造方法
WO2013146644A1 (fr) * 2012-03-29 2013-10-03 住友化学株式会社 Film stratifié, procédé de production d'un film stratifié polarisant et procédé de production de plaque de polarisation
JP2014074786A (ja) * 2012-10-04 2014-04-24 Nitto Denko Corp 延伸積層体の製造方法
JP2015094906A (ja) * 2013-11-14 2015-05-18 日東電工株式会社 偏光膜および偏光膜の製造方法
JP2015094907A (ja) * 2013-11-14 2015-05-18 日東電工株式会社 偏光膜および偏光膜の製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4279944B2 (ja) 1999-06-01 2009-06-17 株式会社サンリッツ 偏光板の製造方法
JP5991803B2 (ja) * 2010-10-29 2016-09-14 住友化学株式会社 偏光板の製造方法
JP4975186B1 (ja) * 2010-12-16 2012-07-11 日東電工株式会社 偏光膜の製造方法
KR102329698B1 (ko) * 2013-08-09 2021-11-23 스미또모 가가꾸 가부시키가이샤 장척 원편광판의 제조 방법 및 장척 원편광판

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4979833B1 (ja) * 2010-12-02 2012-07-18 日東電工株式会社 偏光板の製造方法
JP2013122518A (ja) * 2011-12-12 2013-06-20 Nitto Denko Corp 偏光膜の製造方法
WO2013146644A1 (fr) * 2012-03-29 2013-10-03 住友化学株式会社 Film stratifié, procédé de production d'un film stratifié polarisant et procédé de production de plaque de polarisation
JP2014074786A (ja) * 2012-10-04 2014-04-24 Nitto Denko Corp 延伸積層体の製造方法
JP2015094906A (ja) * 2013-11-14 2015-05-18 日東電工株式会社 偏光膜および偏光膜の製造方法
JP2015094907A (ja) * 2013-11-14 2015-05-18 日東電工株式会社 偏光膜および偏光膜の製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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WO2019069755A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image et procédé de production de plaque polarisante
CN111183378A (zh) * 2017-10-03 2020-05-19 日东电工株式会社 偏振片、图像显示装置及偏振片的制造方法
CN111183379A (zh) * 2017-10-03 2020-05-19 日东电工株式会社 偏振片、图像显示装置及偏振片的制造方法
JP2019066714A (ja) * 2017-10-03 2019-04-25 日東電工株式会社 偏光板、画像表示装置、および偏光板の製造方法
JP2019066715A (ja) * 2017-10-03 2019-04-25 日東電工株式会社 偏光板、画像表示装置、および偏光板の製造方法
JP2019066717A (ja) * 2017-10-03 2019-04-25 日東電工株式会社 偏光板、画像表示装置、および偏光板の製造方法
JP2019066716A (ja) * 2017-10-03 2019-04-25 日東電工株式会社 偏光板、画像表示装置、および偏光板の製造方法
WO2019069757A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image, et procédé de production de plaque polarisante
JP7240089B2 (ja) 2017-10-03 2023-03-15 日東電工株式会社 偏光板、画像表示装置、および偏光板の製造方法
TWI771503B (zh) * 2017-10-03 2022-07-21 日商日東電工股份有限公司 偏光板、影像顯示裝置及偏光板之製造方法
CN111164473A (zh) * 2017-10-03 2020-05-15 日东电工株式会社 偏振片、图像显示装置及偏振片的制造方法
KR102640210B1 (ko) * 2017-10-03 2024-02-23 닛토덴코 가부시키가이샤 편광판, 화상 표시 장치 및 편광판의 제조 방법
WO2019069756A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image et procédé de production de plaque polarisante
WO2019069754A1 (fr) * 2017-10-03 2019-04-11 日東電工株式会社 Plaque polarisante, dispositif d'affichage d'image et procédé de production de plaque polarisante
KR20200066299A (ko) * 2017-10-03 2020-06-09 닛토덴코 가부시키가이샤 편광판, 화상 표시 장치 및 편광판의 제조 방법
JP2020013796A (ja) * 2017-12-06 2020-01-23 大日本印刷株式会社 電池用包装材料、電池、これらの製造方法、及びポリエステルフィルム
JP7234867B2 (ja) 2017-12-06 2023-03-08 大日本印刷株式会社 電池用包装材料、電池、これらの製造方法、及びポリエステルフィルム
JP6587039B1 (ja) * 2017-12-06 2019-10-09 大日本印刷株式会社 電池用包装材料、電池、これらの製造方法、及びポリエステルフィルム
WO2019112020A1 (fr) * 2017-12-06 2019-06-13 大日本印刷株式会社 Matériau d'enveloppe pour batterie, batterie, procédés de fabrication de ce matériau d'enveloppe et de cette batterie, et film polyester
CN112840246A (zh) * 2018-10-15 2021-05-25 日东电工株式会社 带相位差层的偏光板及使用其的图像显示装置
CN112840248A (zh) * 2018-10-15 2021-05-25 日东电工株式会社 带相位差层的偏光板及使用其的图像显示装置
CN112840248B (zh) * 2018-10-15 2023-09-29 日东电工株式会社 带相位差层的偏光板及使用其的图像显示装置
CN112840246B (zh) * 2018-10-15 2023-10-03 日东电工株式会社 带相位差层的偏光板及使用其的图像显示装置
CN113366352A (zh) * 2019-01-31 2021-09-07 日东电工株式会社 聚酯薄膜、及包含该聚酯薄膜的偏光板
JP7392715B2 (ja) 2019-04-18 2023-12-06 東洋紡株式会社 ポリエステル系シーラントフィルムおよびそれを用いた包装体

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TWI645223B (zh) 2018-12-21
TW201732332A (zh) 2017-09-16
KR20200022539A (ko) 2020-03-03
JP6893762B2 (ja) 2021-06-23
KR20180107221A (ko) 2018-10-01
KR102219988B1 (ko) 2021-02-24
CN108780172B (zh) 2021-07-20
CN108780172A (zh) 2018-11-09
SG11201807351UA (en) 2018-09-27
JP2017156663A (ja) 2017-09-07

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