JPWO2009119328A1 - 光学フィルムの製造方法及び光学フィルム - Google Patents
光学フィルムの製造方法及び光学フィルム Download PDFInfo
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- JPWO2009119328A1 JPWO2009119328A1 JP2010505527A JP2010505527A JPWO2009119328A1 JP WO2009119328 A1 JPWO2009119328 A1 JP WO2009119328A1 JP 2010505527 A JP2010505527 A JP 2010505527A JP 2010505527 A JP2010505527 A JP 2010505527A JP WO2009119328 A1 JPWO2009119328 A1 JP WO2009119328A1
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- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
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- 230000001131 transforming effect Effects 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 125000003774 valeryl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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Classifications
-
- 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
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
- B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
-
- 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
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- 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
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING 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
- B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
Description
長尺状の熱可塑性樹脂フィルムを2本の搬送ロール間で長手方向に延伸する縦延伸工程と、該縦延伸工程の後に前記熱可塑性樹脂フィルムを幅方向に延伸する横延伸工程と、を有する光学フィルムの製造方法において、
前記縦延伸工程において、幅方向における前記熱可塑性樹脂フィルムの両端部の温度が、幅方向における前記熱可塑性樹脂フィルムの中央部の温度よりも高いことを特徴とする光学フィルムの製造方法。
前記縦延伸工程において、前記両端部の温度が、前記中央部の温度よりも1℃〜20℃高いことを特徴とする前記1に記載の光学フィルムの製造方法。
前記縦延伸工程において、前記両端部の温度が、前記中央部の温度よりも5℃〜15℃高いことを特徴とする前記1または2に記載の光学フィルムの製造方法。
前記縦延伸工程において、前記熱可塑性樹脂フィルムが、前記2本の搬送ロール間に配置された赤外線ヒータにより加温され、
該赤外線ヒータにおける前記熱可塑性樹脂フィルムの搬送方向上流側の端部と、
前記2本の搬送ロールのうち前記熱可塑性樹脂フィルムの搬送方向下流側のロールに前記熱可塑性樹脂フィルムが接する位置との距離が、50mm以上300mm以下であることを特徴とする前記1から3の何れか1項に記載の光学フィルムの製造方法。
前記両端部と前記赤外線ヒータとの距離が、前記中央部と前記赤外線ヒータとの距離より短いことを特徴とする前記4に記載の光学フィルムの製造方法。
前記縦延伸工程において、前記熱可塑性樹脂フィルムが、前記両端部から前記中央部に向けて熱風を吹き付ける熱風送風機により加温されることを特徴とする前記4又は5に記載の光学フィルムの製造方法。
前記縦延伸工程における前記両端部の温度と前記中央部の温度との差は、前記縦延伸工程及び前記横延伸工程を経た後の熱可塑性樹脂フィルムのボーイング量により調整されることを特徴とする前記6に記載の光学フィルムの製造方法。
前記縦延伸工程の後の前記熱可塑性樹脂フィルムの膜厚が20μm以上150μm以下であることを特徴とする前記4から7の何れか1項に記載の光学フィルムの製造方法。
前記縦延伸工程において、前記熱可塑性樹脂フィルムの幅が1500mm以上4000mm以下であることを特徴とする前記4から8の何れか1項に記載の光学フィルムの製造方法。
前記熱可塑性樹脂フィルムが、熱溶融性フィルムであることを特徴とする前記4から9の何れか1項に記載の光学フィルムの製造方法。
前記熱可塑性樹脂フィルムが、セルロースエステルフィルムであることを特徴とする前記1から10の何れか1項に記載の光学フィルムの製造方法。
前記1から11の何れか1項に記載の光学フィルムの製造方法によって製造されたことを特徴とする光学フィルム。
2 フィルター
3 スタチックミキサー
4、50 流延ダイ
5 第1冷却ロール(冷却用第1回転体)
6 タッチロール(押圧用第2回転体)
7 第2冷却ロール(冷却用第3回転体)
8 第3冷却ロール(冷却用第4回転体)
P1 フィルムが最初に第1冷却ロール表面に接触した点
P2 フィルムがタッチロール表面に接触した点
9、52 剥離ロール
10 縦延伸装置
11、13 搬送ロール
15 赤外線ヒータ
16 反射板
17 フィルム
19 スリッター
20 横延伸装置
21 第1延伸前予熱ロール
22 第2延伸前予熱ロール
23 第3延伸前予熱ロール
24 第4延伸前予熱ロール
25 延伸・予熱ロール
26 ニップロール
27 延伸・冷却ロール
28 ニップロール
29 第1延伸後冷却ロール
30 第2延伸後冷却ロール
31 第3延伸後冷却ロール
32 上部加熱ヒータ
33 下部加熱ヒータ
41 ガイドロール
42 ガイドロール
51 流延用ベルト
40 乾燥装置
52 バックロール
53 エンボスリング
60 巻取り装置
S 実質延伸スパン
F 光学フィルム(元巻き)
式(II) 0≦X≦2.5
特にセルロースアセテートプロピオネートが好ましく用いられ、中でも1.9≦X≦2.5であり、0.1≦Y≦0.9であることが好ましい。上記アシル基で置換されていない部分は通常水酸基として存在している。これらは公知の方法で合成することができる。
また、縦延伸ロールの間隔は、フィルムがロールに保持されていない区間は短いほど幅収縮が抑えられる。ここで、ロールの中心同士の間の距離が、400mm以下、好ましくは300mm以下である。
(幅方向の延伸倍率)>(長手方向の延伸倍率)
の条件を満たすことが必要である。
ここで、Mはウェブ(フィルム)の任意時点での質量、Nは質量Mのものを115℃で1時間加熱処理したときのフィルム質量である。
本発明の光学フィルムによって構成される位相差フィルムを含む偏光板は、通常の偏光板と比較して高い表示品質を発現させることができ、特にマルチドメイン型の液晶表示装置、より好ましくは複屈折モードにるマルチドメイン型の液晶表示装置への使用に適している。
実施例1〜7、比較例1
(樹脂混合物)
セルロースアセテートプロピオネート 89質量%
(アセチル基置換度1.4、プロピオニル基置換度1.35、
数平均分子量60000)
トリメチロールプロパントリベンゾエート 9質量%
(可塑剤、融点85℃)
酸化防止剤(IRGANOX XP 420/FD) 0.25質量%
(チバ・ジャパン社製)
紫外線吸収剤 1.6質量%
(TINUVIN 928、チバ・ジャパン社製、融点115℃)
マット剤(シリカ微粒子) 0.15質量%
(シーホスターKEP−30:日本触媒株式会社製、平均粒径0.3μm)
なお、セルロースアセテートプロピオネートのアセチル基、プロピオニル基、ブチリル基等のアシル基の置換度の測定は、ASTM−D817−96に規定の方法に準じて測定した。
つぎに、実施例1〜7及び比較例1において延伸したセルロースアセテートプロピオネートフィルムについて、延伸後の膜厚偏差(μm)を接触式膜厚計を用い、フィルムの全幅において10mm間隔で測定し、端部の急激な膜厚変化を除いた範囲で、最大膜厚と最小膜厚の偏差を評価した。偏差が2μm以下を◎、2μmを越えて5μm以下を○、5μmを越えるものを×とした。膜厚偏差が、5μmを越えると、視野角やコントラストが変化し、製品の品質レベルとして用いることができない。
Claims (12)
- 長尺状の熱可塑性樹脂フィルムを2本の搬送ロール間で長手方向に延伸する縦延伸工程と、該縦延伸工程の後に前記熱可塑性樹脂フィルムを幅方向に延伸する横延伸工程と、を有する光学フィルムの製造方法において、
前記縦延伸工程において、幅方向における前記熱可塑性樹脂フィルムの両端部の温度が、幅方向における前記熱可塑性樹脂フィルムの中央部の温度よりも高いことを特徴とする光学フィルムの製造方法。 - 前記縦延伸工程において、前記両端部の温度が、前記中央部の温度よりも1℃〜20℃高いことを特徴とする請求の範囲第1項に記載の光学フィルムの製造方法。
- 前記縦延伸工程において、前記両端部の温度が、前記中央部の温度よりも5℃〜15℃高いことを特徴とする請求の範囲第1項又は第2項に記載の光学フィルムの製造方法。
- 前記縦延伸工程において、前記熱可塑性樹脂フィルムが、前記2本の搬送ロール間に配置された赤外線ヒータにより加温され、
該赤外線ヒータにおける前記熱可塑性樹脂フィルムの搬送方向上流側の端部と、
前記2本の搬送ロールのうち前記熱可塑性樹脂フィルムの搬送方向下流側のロールに前記熱可塑性樹脂フィルムが接する位置との距離が、50mm以上300mm以下であることを特徴とする請求の範囲第1項から第3項の何れか1項に記載の光学フィルムの製造方法。 - 前記両端部と前記赤外線ヒータとの距離が、前記中央部と前記赤外線ヒータとの距離より短いことを特徴とする請求の範囲第4項に記載の光学フィルムの製造方法。
- 前記縦延伸工程において、前記熱可塑性樹脂フィルムが、前記両端部から前記中央部に向けて熱風を吹き付ける熱風送風機により加温されることを特徴とする請求の範囲第4項又は第5項に記載の光学フィルムの製造方法。
- 前記縦延伸工程における前記両端部の温度と前記中央部の温度との差は、前記縦延伸工程及び前記横延伸工程を経た後の熱可塑性樹脂フィルムのボーイング量により調整されることを特徴とする請求の範囲第6項に記載の光学フィルムの製造方法。
- 前記縦延伸工程の後の前記熱可塑性樹脂フィルムの膜厚が20μm以上150μm以下であることを特徴とする請求の範囲第4項から第7項の何れか1項に記載の光学フィルムの製造方法。
- 前記縦延伸工程において、前記熱可塑性樹脂フィルムの幅が1500mm以上4000mm以下であることを特徴とする請求の範囲第4項から第8項の何れか1項に記載の光学フィルムの製造方法。
- 前記熱可塑性樹脂フィルムが、熱溶融性フィルムであることを特徴とする請求の範囲第4項から第9項の何れか1項に記載の光学フィルムの製造方法。
- 前記熱可塑性樹脂フィルムが、セルロースエステルフィルムであることを特徴とする請求の範囲第1項から第10項の何れか1項に記載の光学フィルムの製造方法。
- 請求の範囲第1項から第11項の何れか1項に記載の光学フィルムの製造方法によって製造されたことを特徴とする光学フィルム。
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WO2012153612A1 (ja) * | 2011-05-06 | 2012-11-15 | コニカミノルタアドバンストレイヤー株式会社 | 延伸セルロースエステルフィルム、及びその製造方法 |
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JP5983732B2 (ja) * | 2012-03-21 | 2016-09-06 | コニカミノルタ株式会社 | 長尺延伸フィルムの製造方法 |
JPWO2013191102A1 (ja) * | 2012-06-21 | 2016-05-26 | コニカミノルタ株式会社 | 光学フィルム積層体の製造方法、薄型偏光膜、偏光板及び液晶表示装置 |
JP6698282B2 (ja) * | 2015-05-29 | 2020-05-27 | 株式会社カネカ | フィルムの製造方法、フィルムの製造装置、及び一軸延伸フィルム |
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US20210149099A1 (en) * | 2018-05-18 | 2021-05-20 | 3M Innovative Properties Company | Shaped optical film |
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