JP2006072298A - 液晶配向フィルムの製造方法、液晶配向フィルム、光学フィルムおよび画像表示装置 - Google Patents
液晶配向フィルムの製造方法、液晶配向フィルム、光学フィルムおよび画像表示装置 Download PDFInfo
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- JP2006072298A JP2006072298A JP2005044035A JP2005044035A JP2006072298A JP 2006072298 A JP2006072298 A JP 2006072298A JP 2005044035 A JP2005044035 A JP 2005044035A JP 2005044035 A JP2005044035 A JP 2005044035A JP 2006072298 A JP2006072298 A JP 2006072298A
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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
- G02B5/3016—Polarising elements involving passive liquid crystal 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09K2323/02—Alignment layer characterised by chemical composition
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
【解決手段】 透明基材フィルムをラビングにより配向処理する工程(1)、剥離力0.5N/50mm以下の表面保護シートを前記配向処理面に貼合する工程(2)、前記表面保護シートを剥離した後に、前記配向処理面に液晶モノマーおよび/または液晶ポリマーを含有する液晶材料を塗工する工程(3)、前記液晶材料を配向させた後、固定化する工程(4)を含むことを特徴とする液晶配向フィルムの製造方法。
【選択図】 なし
Description
工程(1)では、透明基材フィルムをラビングにより配向処理する。
透明基材フィルムは、液晶材料を配向させる温度で変化しないものであれば特に制限はなく、たとえば、単層または積層の各種プラスチックフィルムやガラス板、金属等を使用できる。プラスチックフィルムとしては、たとえば、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系ポリマー、ジアセチルセルロース、トリアセチルセルロース等のセルロース系ポリマー、ポリカーボネート系ポリマー、ポリメチルメタクリレート等のアクリル系ポリマー等の透明ポリマーからなるフィルムがあげられる。またポリスチレン、アクリロニトリル・スチレン共重合体等のスチレン系ポリマー、ポリエチレン、ポリプロピレン、環状ないしノルボルネン構造を有するポリオレフィン、エチレン・プロピレン共重合体等のオレフィン系ポリマー、塩化ビニル系ポリマー、ナイロンや芳香族ポリアミド等のアミド系ポリマー等の透明ポリマーからなるフィルムもあげられる。さらにイミド系ポリマー、スルホン系ポリマー、ポリエーテルスルホン系ポリマー、ポリエーテルエーテルケトン系ポリマー、ポリフェニレンスルフィド系ポリマー、ビニルアルコール系ポリマー、塩化ビニリデン系ポリマー、ビニルブチラール系ポリマー、アリレート系ポリマー、ポリオキシメチレン系ポリマー、エポキシ系ポリマーや前記ポリマーのブレンド物等の透明ポリマーからなるフィルムなどもあげられる。透明基材フィルムとしてはトリアセチルセルロースフィルムやノルボルネン樹脂フィルム、オレフィン系フィルムが好適である。
工程(2)では、剥離力0.5N/50mm以下の表面保護シートを前記配向処理面に貼合する。
工程(3)では、前記表面保護シートを剥離した後に、前記配向処理面に液晶モノマーおよび/または液晶ポリマーを含有する液晶材料を塗工する。
で表されることが好ましく、A1およびA2は同じ基であることが好ましい。
工程(4)では、前記液晶材料を配向させた後、液晶配向層を固定化する。これにより液晶配向層を固定化して液晶配向フィルムが得られる。
ネマチック液晶相を示す液晶モノマー(BASF社製,PaliocolorLC242)10gおよび光重合開始剤(チバスペシャリティケミカルズ社製,イルガキュア907)3g(対重合性液晶化合物)をトルエン40gに溶解した溶液を調製した。
表面保護シート(150mm×50mm)を、トリアセチルセルロースフィルムに貼り合わせ、23℃で、20分間放置した後、180°ピールにて300mm/minのスピードで表面保護シートを剥離した場合の力(N/50mm)を、引張試験機(オリエンテック(株)製,テンシロン)を用いて測定した。
液晶配向フィルムを得るとは別に、透明基材フィルムから表面保護シートを剥離した直後の帯電状態を確認した。透明基材フィルムから表面保護シートを剥離した直後に、その透明基材フィルム面に、プラスに帯電した青色トナーと、マイナスに帯電した赤色トナーを降りかけた後、付着していないトナーを落として、付着したトナーの色分布を目視にて確認した。青色トナーのみが付着している場合には、表面が均一にマイナスに帯電していると判断でき、赤色トナーのみが付着している場合には、表面が均一にプラスに帯電していると判断できる。赤色トナーと青色トナーが混在している場合には、表面の帯電状態が不均一であると判断できる。実施例1において、判断対象とした、付着したトナーの色分布を示す写真を図1に、比較例2に係わる写真を図2に示す。
トリアセチルセルロースフィルム表面を、レーヨン布でラビングにより配向処理した後、直ちに、剥離力0.05N/50mmの表面保護シートを貼合した。表面保護シートは積水化学(株)製の6221Fを用いた。表面保護シートの基材層(厚み50μm,ポリエチレン)と粘着層(エチレン・酢酸ビニル共重合体)を共押出しにより作製したものである。次いで、液晶材料の塗工液を塗工直前に、表面保護シートを剥離(180°ピール)して、前記配向処理面に前記塗工液をワイヤーバー#10で塗工した。90℃で5分間乾燥して液晶材料を配向させた後、メタルハライドランプにて1mJ/cm2の光を照射し、液晶層を固化して、厚さ2μmの液晶配向フィルムを得た。
実施例1において、表面保護シートとして、剥離力0.1N/50mmのものを用いたこと以外は実施例1と同様にして液晶配向フィルムを得た。表面保護シートは(株)サンエー化研製のサンテクトPAC3を用いた。表面保護シートの基材層(厚み60μm,ポリエチレン)と粘着層(エチレン・酢酸ビニル共重合体)を共押出しにより作製したものである。
実施例1において、表面保護シートとして、剥離力0.3N/50mmのものを用いたこと以外は実施例1と同様にして液晶配向フィルムを得た。
実施例1において、表面保護シートを用いなかったこと以外は実施例1と同様にして液晶配向フィルムを得た。比較例1においては、トリアセチルセルロースフィルムとロールとの接触がみられた。
実施例1において、表面保護シートとして、剥離力1.5N/50mmのものを用いたこと以外は実施例1と同様にして液晶配向フィルムを得た。表面保護シートは(株)サンエー化研製のY−16Fを用いた。
実施例1において、表面保護シートとして、剥離力1.0N/50mmのものを用いたこと以外は実施例1と同様にして液晶配向フィルムを得た。表面保護シートは日東電工(株)製のE−MASKを用いた。
日東電工社製の偏光板(SEG1425DU)を2枚用意し、直交状態を作り、その間に、上記で作成した液晶配向フィルム(位相差板)をラビング方向が偏光板の一方の吸収軸(または透過軸)に揃えて配置した。これについて、村上色彩社製DOT−3にて、透過率Y(%)を測定した。ラビング配向角が乱れると透過率が上昇し、配向性が低下していることが確認できる。透過率は、0.1%以下であれば、液晶がラビング方向に一様に配向している状態であると判断でき、これを良好とした。それ以外を不良とした。
Claims (8)
- 透明基材フィルムをラビングにより配向処理する工程(1)、剥離力0.5N/50mm以下の表面保護シートを前記配向処理面に貼合する工程(2)、前記表面保護シートを剥離した後に、前記配向処理面に液晶モノマーおよび/または液晶ポリマーを含有する液晶材料を塗工する工程(3)、前記液晶材料を配向させた後、固定化する工程(4)を含むことを特徴とする液晶配向フィルムの製造方法。
- 表面保護シートは基材層と粘着層を有し、これらが共押出しにより、または基材層に粘着層を塗工することにより作製されたものであること特徴とする請求項1に記載の液晶配向フィルムの製造方法。
- 基材層がオレフィン系樹脂を有し、粘着層がエチレン・酢酸ビニル共重合体を有することを特徴とする請求項2に記載の液晶配向フィルムの製造方法。
- 工程(3)における表面保護シートの剥離時に、透明基材フィルムがプラスまたはマイナスのどちらかの電荷に一様に帯電することを特徴とする請求項1〜3のいずれかに記載の液晶配向フィルムの製造方法。
- 請求項1〜4のいずれかに記載の液晶配向フィルムの製造方法により得られた液晶配向フィルム。
- 請求項5記載の液晶配向フィルムが、少なくとも1つ用いられていることを特徴とする光学フィルム。
- 請求項6記載の光学フィルムを適用した画像表示装置。
- 請求項1〜4の液晶配向フィルムの製造方法において、工程(2)に用いられる、剥離力0.5N/50mm以下の表面保護シート。
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TW094125199A TW200622424A (en) | 2004-08-02 | 2005-07-26 | Method for manufacturing liquid crystal alignment film, liquid crystal alignment film, optical film and image display device |
KR1020050069963A KR100708246B1 (ko) | 2004-08-02 | 2005-07-30 | 액정 배향 필름의 제조 방법, 액정 배향 필름, 광학 필름및 화상 표시 장치 |
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