JP2020008861A - 光学多層フィルム、これを含む光学部品および表示装置 - Google Patents
光学多層フィルム、これを含む光学部品および表示装置 Download PDFInfo
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- JP2020008861A JP2020008861A JP2019127733A JP2019127733A JP2020008861A JP 2020008861 A JP2020008861 A JP 2020008861A JP 2019127733 A JP2019127733 A JP 2019127733A JP 2019127733 A JP2019127733 A JP 2019127733A JP 2020008861 A JP2020008861 A JP 2020008861A
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- FOTKYAAJKYLFFN-UHFFFAOYSA-N decane-1,10-diol Chemical compound OCCCCCCCCCCO FOTKYAAJKYLFFN-UHFFFAOYSA-N 0.000 description 1
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- OREAFAJWWJHCOT-UHFFFAOYSA-N dimethylmalonic acid Chemical compound OC(=O)C(C)(C)C(O)=O OREAFAJWWJHCOT-UHFFFAOYSA-N 0.000 description 1
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
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- 229910052740 iodine Inorganic materials 0.000 description 1
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- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
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- CGEXUOTXYSGBLV-UHFFFAOYSA-N phenyl benzenesulfonate Chemical compound C=1C=CC=CC=1S(=O)(=O)OC1=CC=CC=C1 CGEXUOTXYSGBLV-UHFFFAOYSA-N 0.000 description 1
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- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
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- 229920000570 polyether Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
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- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
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- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- KRIOVPPHQSLHCZ-UHFFFAOYSA-N propiophenone Chemical class CCC(=O)C1=CC=CC=C1 KRIOVPPHQSLHCZ-UHFFFAOYSA-N 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
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Classifications
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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
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
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- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
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- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/06—Substrate layer characterised by chemical composition
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- 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
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- Ophthalmology & Optometry (AREA)
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- Liquid Crystal (AREA)
Abstract
Description
n3<n2<n1 (1)
0.10≦n1−n3≦0.15 (2)
0≦n1−n2≦0.10 (3)
0≦n2−n3≦0.10 (4)。
図1は、一実施形態による光学多層フィルムの断面図を示したものである。
n3<n2<n1 (1)
0.10≦n1−n3≦0.15 (2)
0≦n1−n2≦0.10 (3)
0≦n2−n3≦0.10 (4)。
前記基材層は、面内位相差(Ro)が500nm以下、400nm以下、300nm以下、または200nm以下であり得る。特に、前記基材層は最小面内位相差(Romin)が150nm以下である。具体的に、前記基材層の最小面内位相差は120nm以下、100nm以下、85nm以下、75nm以下、または65nm以下であり得る。前記範囲内であるとき、虹ムラの発生を最小限に抑えることができる。
一方、前記基材層、前記プライマー層および前記ハードコート層が積層された光学多層フィルムは、前記基材層と同一の位相差を有し得る。
前記実施形態によると、前記基材層、プライマー層およびハードコート層の屈折率をそれぞれn1、n2およびn3としたとき、前述の式(1)〜(4)を満足する。
以下、各層別により具体的に説明する。
前記基材層は、ポリエステル樹脂を含む。
前記基材層上にプライマー層が形成される。前記プライマー層は、前記基材層と前記ハードコート層との間の密着性を向上させる役割をする。
前記プライマー層は、熱硬化性樹脂を含み得る。
前記プライマー層上にハードコート層が形成される。前記ハードコート層は、光学多層フィルム表面の硬度を向上させる役割をする。
前記ハードコート層は、光硬化性樹脂を含み得る。
前記光学多層フィルムの製造方法は、(1)ポリエステル樹脂を押出して未延伸シートを得る段階と、(2)前記未延伸シートを70℃〜90℃で予熱した後、2.0〜5.0の長さ方向延伸比(R1)および2.0〜5.0の幅方向延伸比(R2)で延伸する段階と、(3)前記延伸されたシートを150℃〜250℃にて熱固定して基材層を製造する段階と、(4)前記基材層上にプライマー層およびハードコート層を順次的に積層する段階とを含む。
前記製造方法において基材層は、原料樹脂を押出し、予熱、延伸、熱固定を経て製造される。
前記基材層上にプライマー層が形成される。
前記プライマー層用組成物の塗布後には、延伸および熱固定を行うことが好ましい。
次に、前記プライマー層上にハードコート層が形成される。
前記実施形態による光学多層フィルムは、光学部品に適用され得る。
前記光学部品は、具体的に偏光板であり得る。
図4を参照すると、一実施形態による偏光板10は、偏光子11と、前記偏光子の少なくとも一面上に配置される光学多層フィルム12とを含む。
前記実施形態による光学部品は、表示装置に適用され得る。
この際、前記光学部品として前述の構成を有する光学部品が使用される。
図5は、一実施形態による液晶表示装置を概略的に示す断面図である。図5を参照すると、一実施形態による液晶表示装置は、液晶パネル70と、バックライトユニット80とを含む。
図6は、一実施形態による有機電界発光表示装置を概略的に示す断面図である。
図6を参照すると、一実施形態による有機電界発光表示装置は、前面偏光板10と、有機電界発光パネル90とを含む。
以下、実施例によってより具体的に説明するが、これらの範囲に限定されるものではない。
[段階(1)基材層の形成]
ポリエチレンテレフタレート(PET)樹脂(SKC社)を押出機により約280℃にて押出し、キャスティングロールにより約30℃にてキャスティングして未延伸シート(sheet)を製造した。前記未延伸シートを下記表1の温度にて予熱した後、125℃の温度にて表1のような延伸比で長さ方向(MD)および幅方向(TD)に延伸した。その後、延伸されたシートを下記表1の温度で約30秒間熱固定して、それぞれの基材層を製造した。
前記、基材層を形成する過程において、長さ方向(MD)の延伸後、幅方向(TD)に延伸する前に、前記基材層上にプライマー層を形成した。この際、前記基材層上に熱硬化性ポリウレタン系樹脂組成物をマイヤーバー(Mayer bar)により塗布、乾燥して、下記表2の屈折率を有する厚さ85nmのプライマー層を形成した。
ペンタエリトリトールトリアクリレート(PETA)をメチルイソブチルケトン(MIBK)溶媒に30重量%の濃度で溶解させ、光重合開始剤(Irg184、BASF社)を固形分に対して5重量%添加したハードコート層組成物を製造した。前記ハードコート層組成物をバーコーターにより、乾燥後の膜厚が5μmになるようにプライマー層上にコーティングして塗膜を形成した。形成された塗膜を80℃にて1分間乾燥して溶剤を除去し、約300mJ/cm2の紫外線照射により固定させ、下記表2の屈折率を有する厚さ2.5μmのハードコート層を形成した。
フィルムサンプルに対して、屈折率((nx+ny)/2)、面内位相差(Ro)、厚み方向位相差(Rth)、および有効幅内の面内位相差(|ΔRo|/|Δx|)を測定した。
図4のように、偏光子の両面に光学多層フィルムが付着された偏光板を構成した。前記偏光板を表示装置に適用した後、偏光板の正面と傾斜方向とにおいて虹ムラおよび色感が生じるか肉眼で評価した。
○:いずれの方向からも虹ムラおよび色感が観察されない。
△:傾斜方向から、一部淡く虹ムラおよび色感が観察される。
X:傾斜方向において観察したときに、明確に虹ムラおよび色感が観察される。
その結果を下記の表に示した。
前記実施例1と同様の方法で製造した基材層について、有効幅全体における面内位相差(Ro)および厚み方向位相差(Rth)を測定した。
− 幅中心から幅方向に±500mm距離内における面内位相差(Ro)が100nm以下
− 幅中心から幅方向に±1000mm距離内における面内位相差(Ro)が200nm以下
− 有効幅内において、幅方向の変位に対する面内位相差の変化量(|ΔRo|/|Δx|)が300nm/3m未満
− 有効幅内において幅方向の変位に対する厚み方向位相差の変化量(|ΔRth|/|Δx|)が1500nm/3m未満
前記実施例および比較例のフィルムについて、様々な物性を測定した。
Xc[%]=dc(d−da)/d(dc−da)*100
(Xc:結晶化度、dc:結晶部分の密度(g/cm3)、da:非結晶部分の密度(g/cm3)、d:測定点の密度(g/cm3)、本実施例では、dc=1.455(g/cm3)、da=1.335(g/cm3)で計算した)
その結果を下記の表に示した。
10':(下部)偏光板
11:偏光子
12:光学多層フィルム
12a:基材層
12b:プライマー層
12c:ハードコート層
70:液晶パネル
71:カラーフィルタ基板
72:液晶層
73:TFT基板
80:バックライトユニット
90:有機電界発光パネル
91:有機電界発光基板
92:駆動基板
A、B:幅中心
A'、A''、B'、B'':幅中心から移動した点
Claims (15)
- 基材層、プライマー層およびハードコート層の順次的な積層体を含み、
前記基材層は、ポリエステル樹脂を含み、前記基材層の最小面内位相差(Romin)が150nm以下であり、幅方向の変位に対する面内位相差の変化量(|ΔRo|/|Δx|)が550nm/3m未満であり、
前記基材層、プライマー層およびハードコート層の屈折率をそれぞれn1、n2とn3としたときに、下記式(1)〜(4):
n3<n2<n1 (1)
0.10≦n1−n3≦0.15 (2)
0≦n1−n2≦0.10 (3)
0≦n2−n3≦0.10 (4)
を満足する、光学多層フィルム。 - 前記光学多層フィルムが
最小面内位相差(Romin)が150nm以下であり、
幅方向の変位に対する面内位相差の変化量(|ΔRo|/|Δx|)が550nm/3m未満である、請求項1に記載の光学多層フィルム。 - 前記基材層が6000nm以上の最大厚み方向位相差(Rthmax)を有する、請求項1に記載の光学多層フィルム。
- 前記基材層が1.61〜1.69の屈折率(n1)を有する、請求項1に記載の光学多層フィルム。
- 前記基材層が1.63〜1.68の屈折率(n1)を有し、
前記プライマー層が1.53〜1.63の屈折率(n2)を有する、請求項4に記載の光学多層フィルム。 - 前記ハードコート層が1.50〜1.53の屈折率(n3)を有する、請求項5に記載の光学多層フィルム。
- 前記基材層が20μm〜60μmの厚さを有する、請求項1に記載の光学多層フィルム。
- 前記プライマー層が50nm〜120nmの厚さを有する、請求項7に記載の光学多層フィルム。
- 前記ハードコート層が1μm〜5μmの厚さを有する、請求項8に記載の光学多層フィルム。
- 前記基材層が、1.63〜1.68の屈折率(n1)と20μm〜60μmの厚さとを有し、前記プライマー層が、1.53〜1.63の屈折率(n2)と50nm〜120nmの厚さとを有し、前記ハードコート層が1.50〜1.53の屈折率(n3)と1μm〜5μmの厚さとを有する、請求項1に記載の光学多層フィルム。
- 前記プライマー層が熱硬化性ポリウレタン系樹脂を含み、
前記ハードコート層が光硬化性アクリレート系樹脂を含む、請求項1に記載の光学多層フィルム。 - (1)ポリエステル樹脂を押出して未延伸シートを得る段階と、
(2)前記未延伸シートを70℃〜90℃にて予熱した後、2.0〜5.0の長さ方向延伸比(R1)および2.0〜5.0の幅方向延伸比(R2)で延伸する段階と、
(3)前記延伸されたシートを150℃〜250℃にて熱固定して基材層を製造する段階と、
(4)前記基材層上にプライマー層およびハードコート層を順次的に積層する段階とを含む、請求項1に記載の光学多層フィルムの製造方法。 - 前記段階(2)において、前記未延伸シートの幅方向の延伸比に対する長さ方向の延伸比の比率(R1/R2)が0.9〜1.0である、請求項12に記載の光学多層フィルムの製造方法。
- 偏光子と、
前記偏光子の少なくとも一面上に配置される請求項1に記載の光学多層フィルムとを含む、光学部品。 - 表示パネルと、
前記表示パネルの上面および下面のうち少なくとも一面上に配置される、請求項14に記載の光学部品とを含む、表示装置。
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