TW202100632A - Polyester film and organic light emitting display device using the same having excellent optical properties, durability, heat resistance and color expression - Google Patents

Polyester film and organic light emitting display device using the same having excellent optical properties, durability, heat resistance and color expression Download PDF

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TW202100632A
TW202100632A TW109120404A TW109120404A TW202100632A TW 202100632 A TW202100632 A TW 202100632A TW 109120404 A TW109120404 A TW 109120404A TW 109120404 A TW109120404 A TW 109120404A TW 202100632 A TW202100632 A TW 202100632A
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polyester film
compounds
coating
polyester
resin
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TWI838545B (en
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郭奇烈
李仲奎
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韓商Skc股份有限公司
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/0427Coating with only one layer of a composition containing a polymer binder
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001Combinations of extrusion moulding with other shaping operations
    • B29C48/0018Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00Producing flat articles, e.g. films or sheets
    • B29D7/01Films or sheets
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/41Organic pigments; Organic dyes
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10Optical coatings produced by application to, or surface treatment of, optical elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/868Arrangements for polarized light emission
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00Use of polyesters or derivatives thereof, as moulding material
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Polarising Elements (AREA)

Abstract

An embodiment of the present invention relates to a polyester film and an organic light emitting display device using the same. The polyester film includes: a substrate layer including a polyester resin; and a coating layer provided on the substrate layer and including a dichroic dye. In the wavelength range of 380 nm to 780 nm, the polyester film has a degree of polarization exceeding 50% and a light transmittance of more than 40%, and it has excellent optical properties, durability, heat resistance and color expression.

Description

聚酯膜和使用其的有機發光顯示裝置Polyester film and organic light emitting display device using the same

實施方式係關於光學性質、耐久性、耐熱性和色彩表現性均優異的聚酯膜,以及使用該聚酯膜的有機發光顯示裝置。The embodiment relates to a polyester film excellent in optical properties, durability, heat resistance, and color expression, and an organic light-emitting display device using the polyester film.

平板顯示裝置(Flat Panel Display)用於手機、平板電腦、筆記型電腦等各種電子產品,液晶顯示裝置(Liquid Crystal Display)和有機發光顯示裝置(Organic Light Emitting Display)被廣泛用於這種平板顯示裝置中。Flat Panel Display (Flat Panel Display) is used in various electronic products such as mobile phones, tablet computers, notebook computers, etc. Liquid Crystal Display (Liquid Crystal Display) and Organic Light Emitting Display (Organic Light Emitting Display) are widely used in this flat panel display In the installation.

液晶顯示裝置需要具有高偏光度的偏光膜以便有效地透射背光(backlight)的光。另一方面,由於有機發光顯示裝置使用有機發光元件,該有機發光元件為施加電壓時自發光的自發光元件,因此為了準確地實現黑屏並確保室外可見度而使用偏光膜。The liquid crystal display device requires a polarizing film with a high degree of polarization in order to effectively transmit backlight light. On the other hand, since the organic light-emitting display device uses an organic light-emitting element which is a self-luminous element that emits light when a voltage is applied, a polarizing film is used in order to accurately achieve a black screen and ensure outdoor visibility.

目前,儘管液晶顯示裝置和有機發光顯示裝置的所需特性有所不同,但依然將用於液晶顯示裝置的偏光膜使用於有機發光顯示裝置中。但是,對於有機發光顯示裝置,由於不需要高偏振光學性質,因此需要開發具有適合於有機發光顯示裝置的光學性質並確保顏色實現和室外可見度的偏光膜。At present, although the required characteristics of liquid crystal display devices and organic light emitting display devices are different, polarizing films used in liquid crystal display devices are still used in organic light emitting display devices. However, for organic light emitting display devices, since high polarization optical properties are not required, it is necessary to develop a polarizing film having optical properties suitable for organic light emitting display devices and ensuring color realization and outdoor visibility.

例如,在日本公開專利第2005-266502號中,雖然偏光膜的偏光度為95%以上,但是透射率至少為40%以上,因此即使滿足液晶顯示裝置所需的高偏光度,光損失也很多,所以色彩表現性低,因此不適用於有機發光顯示裝置。For example, in Japanese Laid-open Patent No. 2005-266502, although the polarization degree of the polarizing film is 95% or more, the transmittance is at least 40% or more. Therefore, even if the high degree of polarization required for liquid crystal display devices is satisfied, the light loss is large. , So the color performance is low, so it is not suitable for organic light-emitting display devices.

本申請請求申請日為2019/6/28的中國專利申請10-2019-0077867的優先權。本申請引用上述中國專利申請的全文。This application claims the priority of Chinese patent application 10-2019-0077867 whose filing date is 2019/6/28. This application quotes the full text of the aforementioned Chinese patent application.

因此,實施方式提供具有適用於有機發光顯示裝置的光學性質,並且耐久性、耐熱性和色彩表現性均優異的聚酯膜,以及使用該聚酯膜的有機發光顯示裝置。Therefore, the embodiment provides a polyester film that has optical properties suitable for an organic light-emitting display device and is excellent in durability, heat resistance, and color expression, and an organic light-emitting display device using the polyester film.

根據一實施方式的聚酯膜包括:基材層,其係包含聚酯樹脂;以及,塗層,其係設置於上述基材層上,並且包含二色性染料,所述聚酯膜在380 nm至780 nm的波長範圍內,偏光度為超過50%,並且透光率為40%以上。The polyester film according to one embodiment includes: a substrate layer including a polyester resin; and a coating layer, which is provided on the substrate layer and includes a dichroic dye, and the polyester film is 380 In the wavelength range from nm to 780 nm, the degree of polarization is more than 50%, and the light transmittance is more than 40%.

根據一實施方式的用於有機發光元件的偏光板包括如上述實施方式的聚酯膜。A polarizing plate for an organic light emitting element according to an embodiment includes the polyester film as in the above embodiment.

根據一實施方式的有機發光顯示裝置包括如上述實施方式的用於有機發光元件的偏光板。An organic light emitting display device according to an embodiment includes a polarizing plate for an organic light emitting element as in the above embodiment.

根據一實施方式的聚酯膜的製造方法包括:(1)將聚酯樹脂經過熔融擠出以製造未延伸片材的步驟;(2)沿著第一方向初次延伸上述未延伸片材的步驟;(3)在上述初次延伸後的片材上塗布包含二色性染料的組合物的步驟;以及,(4)沿著垂直於上述第一方向的第二方向二次延伸上述塗布後的片材的步驟。A method of manufacturing a polyester film according to an embodiment includes: (1) a step of melt-extruding a polyester resin to produce an unstretched sheet; (2) a step of initially extending the unstretched sheet in a first direction (3) the step of coating a composition containing a dichroic dye on the previously stretched sheet; and (4) the second stretch of the coated sheet along a second direction perpendicular to the first direction Material steps.

根據一實施方式的聚酯膜具有適用於有機發光顯示裝置的光學性質,並且具有優異的耐久性、耐熱性和色彩表現性。The polyester film according to an embodiment has optical properties suitable for an organic light-emitting display device, and has excellent durability, heat resistance, and color expression.

較佳具體實施方式Preferred embodiment

以下,透過實施方式詳細說明本發明。實施方式不限於以下公開的內容,並且在不變更本發明的要旨的前提下,可以以各種形式變化。Hereinafter, the present invention will be explained in detail through embodiments. The embodiment is not limited to the content disclosed below, and can be changed in various forms without changing the gist of the present invention.

在本說明書中,當將每個層、膜或片材記載為設置於每個層、膜或片材之上(on)或之下(under)時,其包括直接(directly)或間接地經由其他構成要素設置。In this specification, when each layer, film or sheet is described as being provided on or under each layer, film or sheet, it includes directly or indirectly via Other component settings.

在本說明書中,當部件“包括”某個構成要素時,除非另外說明,否則該部件可以進一步包括其他構成要素,而不排除其他構成要素。In this specification, when a component "includes" a certain component, unless otherwise specified, the component may further include other components without excluding other components.

應當理解,除非另有說明,否則在所有情況下,用術語“約”修飾表示本說明書中描述的成分的量,反應條件等的所有數字和表達。It should be understood that, unless otherwise specified, in all cases, the term "about" is used to modify all numbers and expressions representing the amounts of ingredients, reaction conditions, etc. described in this specification.

聚酯膜Polyester film

根據一實施方式的聚酯膜包括:基材層,其係包含聚酯樹脂;以及,塗層,其係設置於上述基材層上,並且包含二色性染料(dichroic dye),所述聚酯膜在380 nm至780 nm的波長範圍內,偏光度為超過50%,並且透光率為40%以上。The polyester film according to one embodiment includes: a substrate layer including a polyester resin; and a coating layer, which is provided on the substrate layer and includes a dichroic dye, and the poly The ester film has a polarization degree of more than 50% in the wavelength range of 380 nm to 780 nm, and a light transmittance of more than 40%.

根據一實施方式,上述基材層為聚酯樹脂層。According to one embodiment, the above-mentioned base material layer is a polyester resin layer.

根據一實施方式,上述基材層的聚酯樹脂包括二醇成分和二羧酸成分。具體地,上述基材層可以透過包括二醇成分和二羧酸成分的聚酯樹脂來形成。According to one embodiment, the polyester resin of the substrate layer includes a diol component and a dicarboxylic acid component. Specifically, the above-mentioned base material layer may be formed through a polyester resin including a diol component and a dicarboxylic acid component.

根據一實施方式,上述二醇成分可以由直鏈或支鏈的脂肪族C2-C10二醇組成。即,上述二醇成分可以不包括脂環族二醇或芳香族二醇。當使用包含由直鏈或支鏈脂肪族C2-C10二醇組成的二醇成分的聚酯樹脂經過熔融擠出以製造膜或片材時,由於填充性能良好,因此膜具有優異的耐化學性和表面強度。According to an embodiment, the above-mentioned diol component may be composed of a linear or branched aliphatic C2-C10 diol. That is, the aforementioned diol component may not include alicyclic diol or aromatic diol. When a polyester resin containing a diol component composed of a linear or branched aliphatic C2-C10 diol is used to manufacture a film or sheet through melt extrusion, the film has excellent chemical resistance due to good filling performance And surface strength.

具體地,上述直鏈或支鏈的脂肪族C2-C10二醇可以包括乙二醇、二甘醇、新戊二醇、1,3-丙二醇、1,2-辛二醇、1,3-辛二醇、2,3-丁二醇、1,3-丁二醇、1,4-丁二醇、1,5-戊二醇、2-丁基-2-乙基-1,3-丙二醇、2,2-二乙基-1,5-戊二醇、2,4-二乙基-1,5-戊二醇、3-甲基-1,5-戊二醇、1,1-二甲基-1,5-戊二醇、1,6-己二醇、2-乙基-3-甲基-1,5-己二醇、2-乙基-3-乙基-1,5-己二醇、1,7-庚二醇、2-乙基-3甲基-1,5-庚二醇、2-乙基-3-乙基-1,6-庚二醇、1,8-辛二醇、1,9-壬二醇、1,10-癸二醇等的衍生物或其任意組合,但並不僅限於此。Specifically, the above-mentioned linear or branched aliphatic C2-C10 diol may include ethylene glycol, diethylene glycol, neopentyl glycol, 1,3-propanediol, 1,2-octanediol, 1,3- Octanediol, 2,3-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 2-butyl-2-ethyl-1,3- Propylene glycol, 2,2-diethyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,1 -Dimethyl-1,5-pentanediol, 1,6-hexanediol, 2-ethyl-3-methyl-1,5-hexanediol, 2-ethyl-3-ethyl-1 ,5-hexanediol, 1,7-heptanediol, 2-ethyl-3methyl-1,5-heptanediol, 2-ethyl-3-ethyl-1,6-heptanediol, Derivatives such as 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, or any combination thereof, but are not limited thereto.

根據一實施方式,上述二醇成分可以包括選自乙二醇、二甘醇、環己烷二甲醇(cyclohexanedimethanol, CHDM)、丙二醇、丁二醇、戊二醇、己二醇和辛二醇中的至少一種,此時二醇成分可以被C1至C6烷基取代或未取代。According to an embodiment, the above-mentioned glycol component may include selected from ethylene glycol, diethylene glycol, cyclohexanedimethanol (CHDM), propylene glycol, butylene glycol, pentanediol, hexanediol, and octanediol. At least one, the diol component in this case may be substituted or unsubstituted with C1 to C6 alkyl.

根據一實施方式,上述二醇成分可以包括乙二醇、二甘醇、1,4-環己烷二甲醇、1,3-丙二醇、1,2-辛二醇、1,3-辛二醇、2,3-丁二醇、1,3 -丁二醇、1,4-丁二醇、1,5-戊二醇、新戊二醇、2-丁基-2-乙基-1,3-丙二醇、2,2-二乙基-1,5-戊二醇、2,4-二乙基-1,5-戊二醇、3-甲基-1,5-戊二醇、1,1-二甲基-1,5-戊二醇或其組合。According to one embodiment, the aforementioned glycol component may include ethylene glycol, diethylene glycol, 1,4-cyclohexanedimethanol, 1,3-propanediol, 1,2-octanediol, 1,3-octanediol , 2,3-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, neopentyl glycol, 2-butyl-2-ethyl-1, 3-propanediol, 2,2-diethyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1 ,1-Dimethyl-1,5-pentanediol or a combination thereof.

根據一實施方式,上述二醇成分可以包括選自乙二醇、二甘醇、新戊二醇和環己烷二甲醇中的至少一種。According to an embodiment, the aforementioned glycol component may include at least one selected from ethylene glycol, diethylene glycol, neopentyl glycol, and cyclohexanedimethanol.

根據一實施方式,以上述二醇成分的總莫耳數為基準,上述聚酯樹脂可以包括30莫耳%至90莫耳%的乙二醇。例如,以上述二醇成分的總莫耳數為基準,上述聚酯樹脂可以包括40莫耳%至90莫耳%,50莫耳%至85莫耳%或65莫耳%至85莫耳%的乙二醇。According to an embodiment, the polyester resin may include 30 mol% to 90 mol% of ethylene glycol based on the total moles of the diol components. For example, based on the total moles of the above-mentioned glycol components, the polyester resin may include 40 mole% to 90 mole%, 50 mole% to 85 mole%, or 65 mole% to 85 mole%.的ethylene glycol.

根據一實施方式,以上述二醇成分的總莫耳數為基準,上述聚酯樹脂可以包括30莫耳%至90莫耳%的新戊二醇。例如,以上述二醇成分的總莫耳數為基準,上述聚酯樹脂可以包括35莫耳%至90莫耳%,35莫耳%至80莫耳%,35莫耳%至75莫耳%,35莫耳%至70莫耳%,40莫耳%至65莫耳%,40莫耳%至60莫耳%的新戊二醇。當滿足上述範圍時,可能易於控制晶體性質。According to an embodiment, the polyester resin may include 30 to 90 mol% neopentyl glycol based on the total mol of the diol component. For example, based on the total moles of the above-mentioned glycol components, the polyester resin may include 35 mole% to 90 mole%, 35 mole% to 80 mole%, and 35 mole% to 75 mole%. , 35 mol% to 70 mol%, 40 mol% to 65 mol%, 40 mol% to 60 mol% neopentyl glycol. When the above range is satisfied, the crystal properties may be easily controlled.

上述二羧酸成分可以為芳香族二羧酸,例如,對苯二甲酸、二甲基對苯二甲酸、間苯二甲酸、萘二甲酸、鄰苯二甲酸等;脂肪族二羧酸,例如,己二酸、壬二酸、癸二酸、癸烷二羧酸等;脂環族二羧酸;其酯化產物;或其組合。具體地,上述二羧酸成分可以由對苯二甲酸、二甲基對苯二甲酸、間苯二甲酸、萘二甲酸、鄰苯二甲酸或其組合組成。The aforementioned dicarboxylic acid component may be an aromatic dicarboxylic acid, for example, terephthalic acid, dimethylterephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, phthalic acid, etc.; aliphatic dicarboxylic acid, for example , Adipic acid, azelaic acid, sebacic acid, decane dicarboxylic acid, etc.; cycloaliphatic dicarboxylic acid; its esterified product; or a combination thereof. Specifically, the aforementioned dicarboxylic acid component may be composed of terephthalic acid, dimethyl terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, phthalic acid, or a combination thereof.

根據一實施方式,上述二羧酸成分可以包括芳香族二羧酸。例如,以上述二羧酸成分的總莫耳數為基準,上述二羧酸成分可以包括80莫耳%以上,90莫耳%以上,或95莫耳%以上的對苯二甲酸。According to one embodiment, the aforementioned dicarboxylic acid component may include an aromatic dicarboxylic acid. For example, based on the total moles of the dicarboxylic acid component, the dicarboxylic acid component may include terephthalic acid in an amount of 80 mol% or more, 90 mol% or more, or 95 mol% or more.

根據一實施方式,上述聚酯樹脂的特性黏度(IV)可以為0.60 dl/g至3.0 dl/g。例如,上述聚酯樹脂的特性黏度可以為0.63 dl/g至1.2 dl/g,0.65 dl/g至1.1 dl/g或0.67 dl/g至1.0 dl/g。當滿足上述範圍時,壓延性優異,壓延工序中的運動黏度保持率優異,而且片材和膜的厚度均勻性優異。According to an embodiment, the intrinsic viscosity (IV) of the polyester resin may be 0.60 dl/g to 3.0 dl/g. For example, the intrinsic viscosity of the polyester resin may be 0.63 dl/g to 1.2 dl/g, 0.65 dl/g to 1.1 dl/g, or 0.67 dl/g to 1.0 dl/g. When the above range is satisfied, the calenderability is excellent, the kinematic viscosity retention in the rolling process is excellent, and the thickness uniformity of the sheet and film is excellent.

根據一實施方式,上述聚酯樹脂的結晶熱可以為2.5 J/g以下。例如,上述聚酯樹脂的結晶熱量可以為0至2.2 J/g或0至2 J/g。當滿足上述範圍時,具有提高壓延性的效果。According to one embodiment, the heat of crystallization of the polyester resin may be 2.5 J/g or less. For example, the heat of crystallization of the above polyester resin may be 0 to 2.2 J/g or 0 to 2 J/g. When the above range is satisfied, there is an effect of improving the calenderability.

根據一實施方式,以上述塗層的總重量為基準,上述塗層可以包括0.5重量%以上至小於50重量%的二色性染料。例如,以上述塗層的總重量為基準,上述塗層可以包括0.5重量%以上至小於20重量%,4重量%至18重量%,或4重量%至16重量%的二色性染料。具體地,以上述塗層的總重量為基準,上述塗層可以包括4重量%以上至小於20重量%的二色性染料。當滿足上述範圍時,可以獲得適合於有機發光顯示裝置的透光率、霧度和偏光度的光學性質,並且可以防止由於二色性染料的含量過多而導致的塗層的分散性劣化。According to one embodiment, based on the total weight of the coating, the coating may include 0.5 wt% or more to less than 50 wt% of the dichroic dye. For example, based on the total weight of the coating, the coating may include 0.5 wt% or more to less than 20 wt%, 4 wt% to 18 wt%, or 4 wt% to 16 wt% of dichroic dye. Specifically, based on the total weight of the above-mentioned coating, the above-mentioned coating may include 4% by weight or more to less than 20% by weight of the dichroic dye. When the above range is satisfied, optical properties suitable for light transmittance, haze, and polarization of an organic light emitting display device can be obtained, and deterioration of the dispersibility of the coating layer due to excessive content of the dichroic dye can be prevented.

根據一實施方式,上述二色性染料的二色性比(dichroic ratio)可以為1.5至14。例如,上述二色性染料的二色性比可以為2至14,3至14,或4至14。According to an embodiment, the dichroic ratio of the dichroic dye may be 1.5-14. For example, the dichroic ratio of the above-mentioned dichroic dye may be 2-14, 3-14, or 4-14.

根據一實施方式,上述二色性染料在380 nm至780 nm的波長範圍內可以具有0.4以下的吸光度。例如,上述二色性染料在380 nm至780 nm的波長範圍內可以具有0.39以下或0.38以下的吸光度。According to an embodiment, the above-mentioned dichroic dye may have an absorbance of 0.4 or less in a wavelength range of 380 nm to 780 nm. For example, the aforementioned dichroic dye may have an absorbance of 0.39 or less or 0.38 or less in a wavelength range of 380 nm to 780 nm.

根據一實施方式,上述二色性染料的熔點(Tm)可以為100 ℃至140 ℃。例如,上述二色性染料的熔點(Tm)可以為100 ℃至130 ℃或110 ℃至140 ℃。According to an embodiment, the melting point (Tm) of the dichroic dye may be 100°C to 140°C. For example, the melting point (Tm) of the aforementioned dichroic dye may be 100°C to 130°C or 110°C to 140°C.

根據一實施方式,上述二色性染料可以為偶氮類化合物、蒽醌類化合物、偶氮甲堿類化合物、靛藍類化合物、硫靛類化合物、花青類化合物、茚滿(indane)類化合物、甘菊環(azulene)類化合物、苝(Perylene)類化合物、酞吡呤酮(phthaloperinone)類化合物或吖嗪(azin)類化合物。According to one embodiment, the dichroic dye may be an azo compound, an anthraquinone compound, an azomethine compound, an indigo compound, a thioindigo compound, a cyanine compound, an indane compound , Azulene (azulene) compounds, perylene (Perylene) compounds, phthaloperinone (phthaloperinone) compounds or azin (azin) compounds.

根據一實施方式,上述塗層還可以包括底漆。According to an embodiment, the above-mentioned coating may further include a primer.

根據一實施方式,上述底漆可以包括選自黏合劑樹脂、固化劑、分散劑和表面活性劑中的至少一種。According to an embodiment, the aforementioned primer may include at least one selected from the group consisting of a binder resin, a curing agent, a dispersant, and a surfactant.

根據一實施方式,上述黏合劑樹脂可以包括選自丙烯酸樹脂、聚氨酯樹脂和聚酯樹脂中的至少一種。According to an embodiment, the aforementioned binder resin may include at least one selected from acrylic resin, polyurethane resin, and polyester resin.

上述丙烯酸樹脂可以為聚二季戊四醇五丙烯酸酯、三羥乙基異氰脲酸酯三丙烯酸酯、二(甲基)丙烯醯氧乙基異氰脲酸酯、異氰脲酸酯二(甲基)丙烯酸酯、三羥甲基丙烷三(甲基)丙烯酸酯、三羥甲基丙烷三丙烯酸酯、環氧乙烷改性六氫鄰苯二甲酸二(甲基)丙烯酸酯、二季戊四醇三(甲基)丙烯酸酯、丙酸改性二季戊四醇三(甲基)丙烯酸酯、季戊四醇三(甲基)丙烯酸酯、二羥甲基二環戊烷二(甲基)丙烯酸酯、環氧丙烷改性三羥甲基丙烷三(甲基)丙烯酸酯、三環癸烷二甲醇(甲基)丙烯酸酯、三(丙烯醯氧乙基)異氰脲酸酯、丙酸改性二季戊四醇五(甲基)丙烯酸酯、二季戊四醇六(甲基)丙烯酸酯、己內酯改性二季戊四醇六(甲基)丙烯酸酯或其組合,但並不僅限於此。The above acrylic resin may be polydipentaerythritol pentaacrylate, trihydroxyethyl isocyanurate triacrylate, di(meth)acrylic acid oxyethyl isocyanurate, isocyanurate di(methyl) ) Acrylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane triacrylate, ethylene oxide modified hexahydrophthalic di(meth)acrylate, dipentaerythritol tri( Meth) acrylate, propionic acid modified dipentaerythritol tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dimethylol dicyclopentane di(meth)acrylate, propylene oxide modified Trimethylolpropane tri(meth)acrylate, tricyclodecane dimethanol (meth)acrylate, tris(propylene oxyethyl) isocyanurate, propionic acid modified dipentaerythritol penta(methyl) ) Acrylate, dipentaerythritol hexa(meth)acrylate, caprolactone modified dipentaerythritol hexa(meth)acrylate, or a combination thereof, but not limited thereto.

上述聚氨酯樹脂可以包括聚酯聚氨酯樹脂,但並不僅限於此。例如,上述聚氨酯樹脂可以為水分散性聚氨酯樹脂,作為市售品可以為DIC公司的HYDRAN AP-20等,但並不僅限於此。The aforementioned polyurethane resin may include polyester polyurethane resin, but is not limited thereto. For example, the above-mentioned polyurethane resin may be a water-dispersible polyurethane resin, and as a commercially available product, it may be HYDRAN AP-20 of DIC Corporation, etc., but it is not limited thereto.

上述聚酯樹脂可以為聚對苯二甲酸乙二醇酯或共聚的聚對苯二甲酸乙二醇酯,但並不僅限於此。The above-mentioned polyester resin may be polyethylene terephthalate or copolymerized polyethylene terephthalate, but is not limited thereto.

根據一實施方式,上述塗層的厚度可以為100 nm以下。例如,上述塗層的厚度可以為10 nm至100 nm,20 nm至100 nm,30 nm至100 nm,30 nm至80 nm,30 nm至70 nm,或30 nm至60 nm。According to an embodiment, the thickness of the coating layer may be 100 nm or less. For example, the thickness of the coating may be 10 nm to 100 nm, 20 nm to 100 nm, 30 nm to 100 nm, 30 nm to 80 nm, 30 nm to 70 nm, or 30 nm to 60 nm.

根據一實施方式,以上述塗層的總重量為基準,上述塗層可以包括5重量%至30重量%的黏合劑樹脂。例如,以上述塗層的總重量為基準,上述塗層可以包括5重量%至25重量%,8重量%至20重量%,或10重量%至15重量%的黏合劑樹脂。According to an embodiment, based on the total weight of the coating, the coating may include a binder resin in an amount of 5% to 30% by weight. For example, based on the total weight of the coating, the coating may include 5 wt% to 25 wt%, 8 wt% to 20 wt%, or 10 wt% to 15 wt% of binder resin.

如有需要,上述底漆可以包括本領域慣用的固化劑、表面活性劑和分散劑,以促進反應或提高塗覆性能。If necessary, the aforementioned primer may include curing agents, surfactants, and dispersants commonly used in the art to promote the reaction or improve coating performance.

雖然並不具體限定本領域慣用的固化劑,但若舉例說明,可以使用噁啉類、環氧類、碳醯亞胺類、三聚氰胺類固化劑等。Although the curing agent commonly used in this field is not specifically limited, if it is exemplified, oxaline, epoxy, carbimidate, melamine, etc. curing agents can be used.

雖然並不具體限定本領域慣用的分散劑,但若舉例說明,可以使用氫氧化鈉、氫氧化鉀、碳酸鈉等鹼金屬化合物,異丙基三硬脂基鈦酸酯、異丙基三(十二烷基苯磺醯基)鈦酸酯、四氧基氧化鈦等鈦類化合物,矽烷類化合物,多元羧酸、多元羧酸酯等羧酸類化合物,聚乙烯吡咯烷酮、N-乙烯基吡咯烷酮等乙烯基吡咯烷酮類化合物。Although the dispersant commonly used in this field is not specifically limited, if an example is given, alkali metal compounds such as sodium hydroxide, potassium hydroxide, sodium carbonate, isopropyl tristearyl titanate, isopropyl tris( Dodecylbenzenesulfonyl) titanate, tetraoxytitanium oxide and other titanium compounds, silane compounds, polycarboxylic acids, polycarboxylic acid esters and other carboxylic acid compounds, polyvinylpyrrolidone, N-vinylpyrrolidone, etc. Vinylpyrrolidone compounds.

雖然並不具體限定為了提升粒子的分散性而使用的上述表面活性劑,但若舉例說明,可以使用具有選自烷氧基、羥基、胺基和共軛雙鍵中的至少一個官能團的表面活性劑。Although it is not specifically limited to the above-mentioned surfactants used to improve the dispersibility of particles, as an example, a surface active having at least one functional group selected from an alkoxy group, a hydroxyl group, an amino group, and a conjugated double bond can be used. Agent.

根據一實施方式,上述底漆和上述二色性染料的重量比可以為2至20:1。例如,上述底漆和上述二色性染料的重量比可以為2.5至20:1,2.5至15:1,3至13:1,3至10:1,3至8:1,或3至5:1。當滿足上述範圍時,可以獲得適合於有機發光顯示裝置的透光率、霧度和偏光度的光學特性。According to an embodiment, the weight ratio of the primer and the dichroic dye may be 2 to 20:1. For example, the weight ratio of the primer and the dichroic dye may be 2.5 to 20:1, 2.5 to 15:1, 3 to 13:1, 3 to 10:1, 3 to 8:1, or 3 to 5. :1. When the above range is satisfied, optical characteristics suitable for light transmittance, haze, and polarization of an organic light emitting display device can be obtained.

根據一實施方式,在380 nm至780 nm的波長範圍內,上述聚酯膜的偏光度超過50%。例如,在380 nm至780 nm的波長範圍內,上述聚酯膜的偏光度可以為50%以上,53%以上,55%以上,50%至90%,50%至85%,50%至80%, 53%至80%,54%至80%,54%至75%,54%至70%,54%至65%,或54%至60%。According to an embodiment, in the wavelength range of 380 nm to 780 nm, the degree of polarization of the polyester film exceeds 50%. For example, in the wavelength range of 380 nm to 780 nm, the polarization degree of the polyester film can be 50% or more, 53% or more, 55% or more, 50% to 90%, 50% to 85%, 50% to 80 %, 53% to 80%, 54% to 80%, 54% to 75%, 54% to 70%, 54% to 65%, or 54% to 60%.

根據一實施方式,上述聚酯膜的透光率為40%以上。具體地,在380 nm至780 nm的波長範圍內,上述聚酯膜的透光率為40%以上。例如,上述聚酯膜的透光率可以為50%以上,55%以上,60%以上,65%以上,40%至90%,50%至80%,55%至75%,60%至75 %,或65%至75%。According to one embodiment, the light transmittance of the polyester film is 40% or more. Specifically, in the wavelength range of 380 nm to 780 nm, the light transmittance of the polyester film is 40% or more. For example, the light transmittance of the above polyester film may be 50% or more, 55% or more, 60% or more, 65% or more, 40% to 90%, 50% to 80%, 55% to 75%, 60% to 75%. %, or 65% to 75%.

根據一實施方式,上述聚酯膜的霧度為10%以下。例如,上述聚酯膜的霧度可以為9%以下,8.5%以下,3%至9%,4%至9%,5%至8.5%,或5.5%至8.5%。According to one embodiment, the haze of the polyester film is 10% or less. For example, the haze of the polyester film may be 9% or less, 8.5% or less, 3% to 9%, 4% to 9%, 5% to 8.5%, or 5.5% to 8.5%.

根據一實施方式,上述聚酯膜的厚度可以為10 μm至200 μm。例如,上述聚酯膜的厚度為10 μm至188 μm,10 μm至125 μm,20 μm至188 μm,23 μm至125 μm,30 μm至188 μm,38 μm至125 μm,或38 μm至100 μm。According to an embodiment, the thickness of the above-mentioned polyester film may be 10 μm to 200 μm. For example, the thickness of the above polyester film is 10 μm to 188 μm, 10 μm to 125 μm, 20 μm to 188 μm, 23 μm to 125 μm, 30 μm to 188 μm, 38 μm to 125 μm, or 38 μm to 100 μm.

上述聚酯膜可以用來作為偏光膜。The above-mentioned polyester film can be used as a polarizing film.

根據一實施方式的用於有機發光元件的偏光板包括如上述實施方式的聚酯膜。A polarizing plate for an organic light emitting element according to an embodiment includes the polyester film as in the above embodiment.

根據一實施方式的有機發光顯示裝置包括如上述實施方式的用於有機發光元件的偏光板。An organic light emitting display device according to an embodiment includes a polarizing plate for an organic light emitting element as in the above embodiment.

聚酯膜的製造方法Manufacturing method of polyester film

根據一實施方式的聚酯膜的製造方法包括:(1)將聚酯樹脂經過熔融擠出以製造未延伸片材的步驟;(2)沿著第一方向初次延伸上述未延伸片材的步驟;(3)在上述初次延伸後的片材上塗布包含二色性染料的組合物的步驟;以及,(4)沿著垂直於上述第一方向的第二方向二次延伸上述塗布後的片材的步驟。A method of manufacturing a polyester film according to an embodiment includes: (1) a step of melt-extruding a polyester resin to produce an unstretched sheet; (2) a step of initially extending the unstretched sheet in a first direction (3) the step of coating a composition containing a dichroic dye on the previously stretched sheet; and (4) the second stretch of the coated sheet along a second direction perpendicular to the first direction Material steps.

步驟(1)step 1)

上述步驟(1)為將聚酯樹脂經過熔融擠出以製造未延伸片材的步驟。The above step (1) is a step of manufacturing an unstretched sheet by melt-extrusion of the polyester resin.

根據一實施方式,上述聚酯樹脂可以透過使用選自鍺類化合物、銻類化合物、鋁類化合物和鈦類化合物中的至少一種催化劑,將二醇成分和二羧酸成分聚合而製造。According to one embodiment, the above-mentioned polyester resin can be produced by polymerizing a diol component and a dicarboxylic acid component using at least one catalyst selected from a germanium-based compound, an antimony-based compound, an aluminum-based compound, and a titanium-based compound.

關於上述二醇成分和二羧酸成分的描述如上所述。The description of the aforementioned diol component and dicarboxylic acid component is as described above.

根據一實施方式,可以在250 ℃以上溫度下進行熔融擠出。According to one embodiment, melt extrusion can be performed at a temperature of 250°C or higher.

例如,可以在255 ℃以上,260 ℃以上,270 ℃以上,280 ℃以上,200 ℃至300 ℃,230 ℃至280 ℃,或250 ℃至280 ℃的溫度下進行。上述聚酯膜的有益效果在於,即使在上述溫度範圍內,耐熱性也很強,因此不會出現缺陷。具體地,由於在熔融擠出製程溫度下可能會發生熱分解,因此不適合使用沒有實質性的二色性比的非二色性染料。例如,上述非二色性染料可以具有小於1的二色性比,但並不僅限於此。For example, it can be performed at a temperature of 255°C or higher, 260°C or higher, 270°C or higher, 280°C or higher, 200°C to 300°C, 230°C to 280°C, or 250°C to 280°C. The beneficial effect of the above-mentioned polyester film is that even in the above-mentioned temperature range, the heat resistance is strong, and therefore, no defect occurs. Specifically, since thermal decomposition may occur at the temperature of the melt extrusion process, it is not suitable to use non-dichroic dyes without substantial dichroic ratio. For example, the aforementioned non-dichroic dye may have a dichroic ratio of less than 1, but it is not limited to this.

步驟(2)Step (2)

步驟(2)為沿著第一方向初次延伸上述未延伸片材的步驟。Step (2) is a step of extending the unstretched sheet for the first time along the first direction.

根據一實施方式,上述片材可以在延伸之前在恆定溫度下進行預熱。以上述樹脂的玻璃化轉變溫度(Tg)為基準,上述預熱溫度可以為Tg+5 ℃至Tg+50 ℃。例如,上述預熱溫度可以為70 ℃至90 ℃。當滿足上述範圍時,可以確保容易延伸的片材的柔韌性,並且可以有效地防止延伸期間的破裂現象。According to an embodiment, the aforementioned sheet may be preheated at a constant temperature before stretching. Based on the glass transition temperature (Tg) of the above resin, the above preheating temperature may be Tg+5°C to Tg+50°C. For example, the aforementioned preheating temperature may be 70°C to 90°C. When the above range is satisfied, the flexibility of the easily stretched sheet can be ensured, and cracking during stretching can be effectively prevented.

在本說明書中,上述第一方向可以為縱向方向(MD),也可以為橫向方向(TD)。例如,第一方向可以為縱向方向(MD),並且垂直於上述第一方向的第二方向可以為橫向方向(TD)。或者,上述第一方向可以為橫向方向(TD),並且垂直於上述第一方向的第二方向可以為縱向方向(MD)。In this specification, the above-mentioned first direction may be the longitudinal direction (MD) or the transverse direction (TD). For example, the first direction may be the longitudinal direction (MD), and the second direction perpendicular to the above-mentioned first direction may be the transverse direction (TD). Alternatively, the first direction may be a transverse direction (TD), and the second direction perpendicular to the first direction may be a longitudinal direction (MD).

根據一實施方式,上述初次延伸比可以為1.0至4.0。例如,可以為1.0至3.5,1.3至3.5,1.5至3.3,或1.5至3.0。According to an embodiment, the aforementioned primary stretch ratio may be 1.0 to 4.0. For example, it can be 1.0 to 3.5, 1.3 to 3.5, 1.5 to 3.3, or 1.5 to 3.0.

根據一實施方式,沿著上述第一方向上延伸期間的溫度可以為55 ℃至120 ℃。例如,可以為70 ℃至120 ℃或80 ℃至110 ℃下進行沿著上述第一方向上的延伸。According to an embodiment, the temperature during the extension in the first direction may be 55°C to 120°C. For example, the stretching in the above-mentioned first direction may be performed at 70°C to 120°C or 80°C to 110°C.

步驟(3)Step (3)

步驟(3)為在上述初次延伸後的片材上塗布包含二色性染料的組合物的步驟。Step (3) is a step of coating a composition containing a dichroic dye on the sheet after the initial stretching.

關於上述二色性染料的描述如上所述。The description of the above dichroic dye is as described above.

根據一實施方式,上述塗布可以為旋轉塗布或線上塗布。具體地,較佳係線上塗覆以確保耐熱性,但並不僅限於此。According to an embodiment, the aforementioned coating may be spin coating or in-line coating. Specifically, it is preferable to coat on the wire to ensure heat resistance, but it is not limited to this.

步驟(4)Step (4)

步驟(4)為沿著垂直於上述第一方向的第二方向二次延伸上述塗布後的片材的步驟。Step (4) is a step of extending the coated sheet twice along a second direction perpendicular to the first direction.

根據一實施方式,上述片材可以在延伸之前在恆定溫度下進行預熱。以上述樹脂的玻璃化轉變溫度(Tg)為基準,上述預熱溫度可以為Tg+5 ℃至Tg+50 ℃。例如,上述預熱溫度可以為70 ℃至90 ℃。當滿足上述範圍時,可以確保容易延伸的片材的柔韌性,並且可以有效地防止延伸期間的破裂現象。在本說明書中,上述第二方向可以為縱向方向(MD)或橫向方向(TD)。According to an embodiment, the aforementioned sheet may be preheated at a constant temperature before stretching. Based on the glass transition temperature (Tg) of the above resin, the above preheating temperature may be Tg+5°C to Tg+50°C. For example, the aforementioned preheating temperature may be 70°C to 90°C. When the above range is satisfied, the flexibility of the easily stretched sheet can be ensured, and cracking during stretching can be effectively prevented. In this specification, the above-mentioned second direction may be the longitudinal direction (MD) or the transverse direction (TD).

根據一實施方式,沿著上述第二方向上的延伸比可以為2.0至5.0。例如,可以為2.0至4.8,2.5至4.5,2.5至4.3,或3.0至4.0。According to an embodiment, the extension ratio in the second direction may be 2.0 to 5.0. For example, it can be 2.0 to 4.8, 2.5 to 4.5, 2.5 to 4.3, or 3.0 to 4.0.

根據一實施方式,沿著上述第二方向延伸時的溫度可以為55 ℃至120 ℃。例如,可以在90 ℃至120 ℃或100 ℃至120 ℃下進行沿著上述第二方向的延伸。According to an embodiment, the temperature when extending along the second direction may be 55°C to 120°C. For example, the extension along the above-mentioned second direction may be performed at 90°C to 120°C or 100°C to 120°C.

根據一實施方式,上述初次延伸的延伸比與上述二次延伸的延伸比的比值(即,初次延伸比與二次延伸比的比值)可以為1:1至5。例如,上述初次延伸的延伸比與上述二次延伸的延伸比的比值可以為1:1至4,1:1至3,或1:1至2。According to an embodiment, the ratio of the stretch ratio of the primary stretch to the stretch ratio of the secondary stretch (ie, the ratio of the primary stretch ratio to the secondary stretch ratio) may be 1:1 to 5. For example, the ratio of the extension ratio of the aforementioned primary extension to the extension ratio of the aforementioned secondary extension may be 1:1 to 4, 1:1 to 3, or 1:1 to 2.

根據一實施方式,在步驟(1)至(4)中,最高製程溫度可以為250 ℃以上。例如,在步驟(1)至(4)中,最高製程溫度可以為255 ℃以上,260 ℃以上,270 ℃以上,280 ℃以上,200 ℃至300 ℃,230 ℃至280 ℃,或250 ℃至280 ℃。上述聚酯膜的有益效果在於,即使在上述溫度範圍內,耐熱性也很強,因此不會出現缺陷。According to one embodiment, in steps (1) to (4), the maximum process temperature may be 250° C. or more. For example, in steps (1) to (4), the maximum process temperature can be above 255 ℃, 260 ℃ above, 270 ℃ above, 280 ℃ above, 200 ℃ to 300 ℃, 230 ℃ to 280 ℃, or 250 ℃ to 280 ℃. The beneficial effect of the above-mentioned polyester film is that even in the above-mentioned temperature range, the heat resistance is strong, and therefore, no defect occurs.

具體實施方式Detailed ways

透過以下實施例更詳細地描述上述內容。但是,以下實施例僅用於舉例說明本發明,實施例的範圍並不僅限於此。The above content is described in more detail through the following examples. However, the following examples are only used to illustrate the present invention, and the scope of the examples is not limited thereto.

實施例1Example 1

在配備有攪拌器、溫度計和部分回流冷卻器的不銹鋼高壓釜中,以1.7:1.0的莫耳比混合作為二羧酸組分的對苯二甲酸(TPA)和作為二醇組分的乙二醇(EG),然後將生成的甲醇蒸餾去除的同時進行酯交換反應。之後,在280 ℃,26.6 Pa(0.2 Torr)的減壓條件下進行縮聚反應,以獲取聚酯樹脂。In a stainless steel autoclave equipped with a stirrer, a thermometer and a partial reflux cooler, terephthalic acid (TPA) as the dicarboxylic acid component and ethylenedioxide as the diol component were mixed at a molar ratio of 1.7:1.0 Alcohol (EG) is then distilled to remove the generated methanol while carrying out the transesterification reaction. After that, a polycondensation reaction was carried out at 280°C and a reduced pressure of 26.6 Pa (0.2 Torr) to obtain a polyester resin.

將上述樹脂在280 ℃的擠出機中熔融擠出並引導至t型模頭(T-Die)以形成未延伸片材,然後使用延伸裝置將上述片材沿著MD方向以1.0至1.5的延伸比進行初次延伸。The above resin was melt-extruded in an extruder at 280 ℃ and guided to a t-die (T-Die) to form an unstretched sheet, and then the above-mentioned sheet was stretched along the MD direction at 1.0 to 1.5 using a stretching device Stretch ratio for the first stretch.

製造含有黏合劑樹脂(聚酯類Goo化學公司的Z690)10克,二色性染料(西格瑪奧德裡奇公司的氯唑黑(Chlorazol black))5克,固化劑(日本催化劑公司的WS500)10克,其他添加劑和適量蒸餾水的組合物後,利用上述組合物塗布上述片材。Manufacture containing 10 grams of binder resin (Polyester-based Goo Chemical Company’s Z690), dichroic dye (Sigma-Aldrich’s Chlorazol black (Chlorazol black)) 5 grams, and curing agent (Nippon Catalysts Company’s WS500) 10 grams G, other additives and an appropriate amount of distilled water, then use the above composition to coat the above sheet.

然後,將上述塗布後的片材沿著TD方向以3.0至4.8的延伸比進行延伸,以製造厚度為50 μm的聚酯膜。Then, the above-mentioned coated sheet was stretched along the TD direction at a stretch ratio of 3.0 to 4.8 to produce a polyester film with a thickness of 50 μm.

實施例2至6和比較例1至3Examples 2 to 6 and Comparative Examples 1 to 3

重複上述實施例1的步驟,但是如下表1所示改變塗層的成分和含量以製備聚酯膜。Repeat the steps of Example 1 above, but change the composition and content of the coating as shown in Table 1 below to prepare a polyester film.

另一方面,在比較例1中,使用了僅將染料混合至水而未用黏合劑的組合物作為塗布液,在該情況下,塗布液與聚酯樹脂層之間的黏附性低,因此在聚酯樹脂層上未形成塗層。On the other hand, in Comparative Example 1, a composition in which only the dye was mixed with water without using a binder was used as the coating liquid. In this case, the adhesion between the coating liquid and the polyester resin layer was low, so No coating was formed on the polyester resin layer.

另外,在比較例2和3中,使用了普通染料(FASTOGEN,DIC公司),而未使用二色性染料。In addition, in Comparative Examples 2 and 3, ordinary dyes (FASTOGEN, DIC Corporation) were used, but dichroic dyes were not used.

【表1】 成分 底漆含量(g) 染料含量(g) 底漆:染料 重量比 塗層內的染料含量(重量%) 比較例 1 - - - - 實施例 1 10 5.0 2 : 1 12.00 實施例2 10 2.5 4 : 1 6.00 實施例3 10 2.0 5 : 1 3.33 實施例4 10 1.5 6.7 : 1 2.61 實施例5 10 1.0 10 : 1 1.82 實施例6 10 0.5 20 : 1 0.95 比較例 2 10 3.0 3.3 : 1 4.62 比較例 3 10 2.5 4 : 1 4.00 【Table 1】 ingredient Primer content (g) Dye content (g) Primer: Dye weight ratio Dye content in the coating (wt%) Comparative example 1 - - - - Example 1 10 5.0 twenty one 12.00 Example 2 10 2.5 4: 1 6.00 Example 3 10 2.0 5: 1 3.33 Example 4 10 1.5 6.7: 1 2.61 Example 5 10 1.0 10: 1 1.82 Example 6 10 0.5 20: 1 0.95 Comparative example 2 10 3.0 3.3: 1 4.62 Comparative example 3 10 2.5 4: 1 4.00

評價例1:透光率Evaluation example 1: Light transmittance

使用UV-光譜儀(日本島津製作所,UV-2450)測量透光率。A UV-spectrometer (Shimadzu Corporation, UV-2450, Japan) was used to measure the light transmittance.

評價例2:霧度Evaluation example 2: Haze

使用日本電色工業株式會社的霧度計NDH-5000W測量霧度。A haze meter NDH-5000W manufactured by Nippon Denshoku Industries Co., Ltd. was used to measure the haze.

評價例3:偏光度Evaluation example 3: Polarization

使用UV-光譜儀(日本島津製作所,UV-2450)測量偏光度。A UV-spectrometer (Shimadzu, Japan, UV-2450) was used to measure the degree of polarization.

評價例4:耐濕性Evaluation example 4: Moisture resistance

切成10 cm×10 cm的尺寸,以此準備兩張聚酯膜。重疊使得兩張聚酯膜的一表面彼此接觸後,將其在80 ℃/80% RH下以10 kg的載荷壓縮24小時。之後,將上述壓縮後的聚酯膜冷卻至常溫後,測量該膜的透射率的變化,當透射率的變化為1%以上時標記為X,小於1則標記為O。Cut into a size of 10 cm×10 cm to prepare two polyester films. After overlapping so that one surface of the two polyester films is in contact with each other, they are compressed under a load of 10 kg at 80°C/80% RH for 24 hours. After cooling the compressed polyester film to normal temperature, the transmittance change of the film was measured. When the transmittance change was 1% or more, it was marked as X, and when it was less than 1, it was marked as O.

上述評價例1至4的結果示於如下表2。The results of the above evaluation examples 1 to 4 are shown in Table 2 below.

【表2】 成分 透光率(%) 霧度(%) 偏光度(%) 耐濕性 比較例1 53.31 31.21 53 X 實施例1 50.66 1.11 80 O 實施例2 50.35 1.84 60 O 實施例3 51.47 2.76 58 O 實施例4 51.53 2.57 57 O 實施例5 53.52 2.35 56 O 實施例6 59.36 2.22 51 O 比較例2 52.52 21.11 0.5 X 比較例3 51.37 19.43 0.2 X 【Table 2】 ingredient Transmittance(%) Haze (%) Polarization (%) Moisture resistance Comparative example 1 53.31 31.21 53 X Example 1 50.66 1.11 80 O Example 2 50.35 1.84 60 O Example 3 51.47 2.76 58 O Example 4 51.53 2.57 57 O Example 5 53.52 2.35 56 O Example 6 59.36 2.22 51 O Comparative example 2 52.52 21.11 0.5 X Comparative example 3 51.37 19.43 0.2 X

如上表2所示,相較於比較例中製造的聚酯膜,實施例中製造的聚酯膜具有均衡且優異的透光率、偏光度和霧度的光學性質以及耐濕性,因此可以看出適合用於有機發光顯示裝置中。具體地,可以看出,使用二色性染料的實施例的聚酯膜具有均衡且優異的透光率、偏光度和霧度的光學性質以及耐濕性,而沒有使用染料的比較例1和使用普通染料的比較例2及3則具有較差的霧度、偏光度和耐濕性。As shown in Table 2 above, compared with the polyester film produced in the comparative example, the polyester film produced in the example has balanced and excellent optical properties such as light transmittance, polarization and haze, and moisture resistance, so it can It is seen that it is suitable for use in organic light-emitting display devices. Specifically, it can be seen that the polyester film of the example using the dichroic dye has balanced and excellent optical properties of light transmittance, polarization and haze, and moisture resistance, while the comparative example 1 and the comparative example 1 without using the dye Comparative Examples 2 and 3 using common dyes have poor haze, polarization and moisture resistance.

no

no

Claims (10)

一種聚酯膜,包括: 基材層,其係包含聚酯樹脂;以及, 塗層,其係設置於所述基材層上,並且包含二色性染料, 所述聚酯膜在380 nm至780 nm的波長範圍內,偏光度超過50%,並且透光率為40%以上。A polyester film, including: A substrate layer, which contains polyester resin; and, The coating is provided on the substrate layer and contains a dichroic dye, In the wavelength range of 380 nm to 780 nm, the polyester film has a polarization degree of more than 50% and a light transmittance of more than 40%. 如請求項1所述的聚酯膜,其中,所述聚酯膜的霧度為10%以下,所述聚酯膜的厚度為10 μm至200 μm。The polyester film according to claim 1, wherein the haze of the polyester film is 10% or less, and the thickness of the polyester film is 10 μm to 200 μm. 如請求項1所述的聚酯膜,其中,所述基材層的聚酯樹脂包括二醇成分和二羧酸成分; 所述二色性染料為偶氮類化合物、蒽醌類化合物、偶氮甲堿類化合物、靛藍類化合物、硫靛類化合物、花青類化合物、茚滿類化合物、甘菊環類化合物、苝類化合物、酞吡呤酮類化合物或吖嗪類化合物。The polyester film according to claim 1, wherein the polyester resin of the substrate layer includes a diol component and a dicarboxylic acid component; The dichroic dyes are azo compounds, anthraquinone compounds, azomethine compounds, indigo compounds, thioindigo compounds, cyanine compounds, indan compounds, chamomile compounds, perylene compounds , Phthapyrinone compounds or azine compounds. 如請求項1所述的聚酯膜,其中,以所述塗層的總重量為基準,所述塗層包括4重量%以上至小於20重量%的二色性染料。The polyester film according to claim 1, wherein, based on the total weight of the coating, the coating includes 4% by weight or more and less than 20% by weight of the dichroic dye. 如請求項1所述的聚酯膜,其中,所述二色性染料的二色性比為1.5至14。The polyester film according to claim 1, wherein the dichroic ratio of the dichroic dye is 1.5 to 14. 如請求項1所述的聚酯膜,其中,所述二色性染料的二色性比為1.5至14。The polyester film according to claim 1, wherein the dichroic ratio of the dichroic dye is 1.5 to 14. 如請求項1所述的聚酯膜,其中,所述塗層還包括底漆; 所述底漆包括選自黏合劑樹脂、固化劑、分散劑和表面活性劑中的至少一種。The polyester film according to claim 1, wherein the coating further includes a primer; The primer includes at least one selected from a binder resin, a curing agent, a dispersant, and a surfactant. 如請求項7所述的聚酯膜,其中,所述黏合劑樹脂包括選自丙烯酸樹脂、聚氨酯樹脂和聚酯樹脂中的至少一種; 以所述塗層的總重量為基準,所述塗層包括5重量%至30重量%的所述黏合劑樹脂; 所述底漆和所述二色性染料的重量比為2至20:1。The polyester film according to claim 7, wherein the binder resin comprises at least one selected from acrylic resin, polyurethane resin and polyester resin; Based on the total weight of the coating, the coating includes 5 wt% to 30 wt% of the binder resin; The weight ratio of the primer and the dichroic dye is 2 to 20:1. 一種聚酯膜的製造方法,包括: (1)將聚酯樹脂經過熔融擠出以製造未延伸片材的步驟; (2)沿著第一方向初次延伸所述未延伸片材的步驟; (3)在所述初次延伸後的片材上塗布包含二色性染料的組合物的步驟;以及, (4)沿著垂直於所述第一方向的第二方向二次延伸所述塗布後的片材的步驟。A manufacturing method of polyester film, including: (1) The step of manufacturing an unstretched sheet through melt extrusion of the polyester resin; (2) A step of initially extending the unstretched sheet along the first direction; (3) The step of coating a composition containing a dichroic dye on the sheet after the initial stretching; and, (4) A step of extending the coated sheet twice along a second direction perpendicular to the first direction. 如請求項9所述的聚酯膜的製造方法,其中,所述聚酯樹脂透過使用選自鍺類化合物、銻類化合物、鋁類化合物和鈦類化合物中的至少一種催化劑,將二醇成分和二羧酸成分聚合而製造; 所述初次延伸的延伸比與所述二次延伸的延伸比的比值為1:1至5; 在步驟(1)至(4)中,最高製程溫度為250 ℃以上。The method for producing a polyester film according to claim 9, wherein the polyester resin uses at least one catalyst selected from germanium-based compounds, antimony-based compounds, aluminum-based compounds, and titanium-based compounds to reduce the diol component Manufactured by polymerization with dicarboxylic acid components; The ratio of the extension ratio of the primary extension to the extension ratio of the secondary extension is 1:1 to 5; In steps (1) to (4), the maximum process temperature is 250 ℃ or more.
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