JP5572193B2 - 偏光板の製造方法 - Google Patents
偏光板の製造方法 Download PDFInfo
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- JP5572193B2 JP5572193B2 JP2012205599A JP2012205599A JP5572193B2 JP 5572193 B2 JP5572193 B2 JP 5572193B2 JP 2012205599 A JP2012205599 A JP 2012205599A JP 2012205599 A JP2012205599 A JP 2012205599A JP 5572193 B2 JP5572193 B2 JP 5572193B2
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- roll
- film
- bonding
- polarizing plate
- adhesive
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- 0 C*1=CCCC1 Chemical compound C*1=CCCC1 0.000 description 1
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
- B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
- B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
- B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
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- B29C66/45—Joining of substantially the whole surface of the articles
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
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- B29C66/733—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/14—Velocity, e.g. feed speeds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
- B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
- B32B37/203—One or more of the layers being plastic
- B32B37/206—Laminating a continuous layer between two continuous plastic layers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- 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
Description
前記透明フィルムの片面または前記偏光フィルムの片面もしくは両面に、活性エネルギー線硬化型の接着剤を塗布する接着剤塗工工程と、
前記透明フィルムが前記偏光フィルムの片面または両面に前記接着剤を介して積層されてなる積層体を、搬送方向に回転する一対の貼合ロールの間に挟んだ状態で、少なくとも一方の貼合ロールを他方の貼合ロールの方向に押圧することで、前記透明フィルムと前記偏光フィルムとを貼合する貼合工程と、
前記積層体に活性エネルギー線を照射して前記接着剤を硬化させる活性エネルギー線照射工程とを備え、
前記一対の貼合ロールの一方は、中央部から端部にかけて径が小さくなるテーパー状の外周形状を有するクラウンロールであることを特徴とする、偏光板の製造方法である。
また、本発明は、偏光フィルムの片面または両面に透明フィルムが貼合されてなる偏光板の製造装置であって、
前記透明フィルムの片面または前記偏光フィルムの片面もしくは両面に、活性エネルギー線硬化型の接着剤を塗布するための接着剤塗工装置と、
前記透明フィルムが前記偏光フィルムの片面または両面に前記接着剤を介して積層されてなる積層体を、搬送しながら挟圧することにより、前記透明フィルムと前記偏光フィルムとを貼合するための一対の貼合ロールと、
前記積層体に活性エネルギー線を照射して前記接着剤を硬化させるための活性エネルギー線照射装置とを備え、
前記一対の貼合ロールの一方は、中央部から端部にかけて径が小さくなるテーパー状の外周形状を有するクラウンロールであることを特徴とする、偏光板の製造装置にも関する。
本発明の偏光板に用いられる偏光フィルムは、具体的には、一軸延伸したポリビニルアルコール系樹脂フィルムに二色性色素を吸着配向させたものである。ポリビニルアルコール系樹脂は、ポリビニル酢酸系樹脂をケン化することにより得られる。ポリ酢酸ビニル系樹脂としては、酢酸ビニルの単独重合体であるポリ酢酸ビニルの他に、酢酸ビニルとこれに共重合可能な他の単量体との共重合体(例えば、エチレン−酢酸ビニル共重合体)などが挙げられる。酢酸ビニルと共重合可能な他の単量体としては、他に、不飽和カルボン酸類、オレフィン類、ビニルエーテル類、不飽和スルホン酸類、アンモニウム基を有するアクリルアミド類などが挙げられる。ポリビニルアルコール系樹脂のケン化度は、85モル%以上、好ましくは90モル%以上、より好ましくは98〜100モル%である。ポリビニルアルコール系樹脂の平均重合度は、通常1000〜10000、好ましくは1500〜5000である。これらのポリビニルアルコール系樹脂は、変性されていてもよく、たとえばアルデヒド類で変性されたポリビニルホルマール、ポリビニルアセタール、ポリビニルブチラールなども使用し得る。
本発明において、上述した偏光フィルムの片面または両面には透明フィルムが貼合される。偏光フィルムの両面に透明フィルムが貼合される場合、各々の透明フィルムは同じものであってもよく、異なる種類のフィルムであってもよい。
偏光フィルムと透明フィルムとは、活性エネルギー線硬化型の接着剤を介して貼合される。活性エネルギー線硬化型の接着剤としては、耐候性や屈折率、カチオン重合性などの観点から、活性エネルギー線の照射により硬化するエポキシ樹脂を含有するエポキシ系樹脂組成物からなる接着剤が挙げられる。ただし、これに限定されるものではなく、従来から偏光板の製造に使用されている各種の活性エネルギー線硬化型の接着剤(有機溶剤系接着剤、ホットメルト系接着剤、無溶剤型接着剤など)が採用可能である。活性エネルギー線硬化型の接着剤としては、たとえばアクリルアミド、アクリレート、ウレタンアクリレート、エポキシアクリレートなどのアクリル系樹脂組成物からなる接着剤が挙げられる。
キル基を表し、rは2〜20の整数を表す)。
(i)次式(IX)で示されるエポキシシクロペンチルエーテル類:
上記例示した脂環式エポキシ樹脂の中でも、次の脂環式エポキシ樹脂は、市販されているか、またはその類似物であって、入手が比較的容易である等の理由からより好ましく用いられる。
(B)4−メチル−7−オキサビシクロ[4.1.0]ヘプタン−3−カルボン酸と(4−メチル−7−オキサ−ビシクロ[4.1.0]ヘプト−3−イル)メタノールとのエステル化物[式(I)において、R1=4−CH3、R2=4−CH3の化合物]、
(C)7−オキサビシクロ[4.1.0]ヘプタン−3−カルボン酸と1,2−エタンジオールとのエステル化物[式(II)において、R3=R4=H、n=2の化合物]、
(D)(7−オキサビシクロ[4.1.0]ヘプト−3−イル)メタノールとアジピン酸とのエステル化物[式(III)において、R5=R6=H、p=4の化合物]、
(E)(4−メチル−7−オキサビシクロ[4.1.0]ヘプト−3−イル)メタノールとアジピン酸とのエステル化物[式(III)において、R5=4−CH3、R6=4−CH3、p=4の化合物]、
(F)(7−オキサビシクロ[4.1.0]ヘプト−3−イル)メタノールと1,2−エタンジオールとのエーテル化物[式(V)において、R9=R10=H、r=2の化合物]。
次に図面を参照しながら本発明の偏光板の製造装置および製造方法を説明する。図1は本発明の偏光板の製造装置の一実施形態を示す概略図である。
透明フィルム2,3への接着剤の塗工方法は特に限定されないが、例えば、ドクターブレード、ワイヤーバー、ダイコーター、カンマコーター、グラビアコーターなど、種々の塗工方式が利用できる。このうち、薄膜塗工、パスラインの自由度、幅広への対応などを考慮すると、接着剤塗工装置11,12としてはグラビアロールが好ましい。市販の塗工装置としては例えば富士機械社製のMCD(マイクロチャンバードクター)などが挙げられる。
本工程では、ロール状に巻回された状態から連続的に繰り出された偏光フィルム1の両面に、上記工程により接着剤が塗布された透明フィルム2,3が接着剤を介して積層される。この積層体を、搬送方向に回転する一対の貼合ロール51,52の間に挟んだ状態で、例えば貼合ロール51を貼合ロール52の方向に押圧することで、偏光フィルム1と透明フィルム2,3とが貼合され、積層体4が形成される。この際、偏光フィルムの搬送方向が、貼合ロールの押圧方向に垂直な面に対して好ましくは±3°の範囲内、より好ましくは±1°の範囲内の角度をなすように、偏光フィルムを貼合ロール間に搬送する。特に好ましくは、偏光フィルムの搬送方向が、貼合ロールの押圧方向に垂直な面と重なるように、偏光フィルムを貼合ロール間に搬送する。このようにすることで、偏光フィルムと透明フィルムが貼合ロールの手前で接触して気泡が発生してしまうことがない。
が好ましい。ロール13は、積層体4のラインの動きに従動または回転駆動させてもよく、あるいは固定させて表面を積層体4が滑るようにしてもよい。また、ロール13は、活性エネルギー線の照射による重合硬化時に、積層体4に生じる熱を放熱させるための冷却ロールとして作用させてもよい。その場合、冷却ロールの表面温度は、4〜30℃に設定されることが好ましい。
活性エネルギー線の照射により接着剤の重合硬化を行うために用いる光源は、特に限定されないが、波長400nm以下に発光分布を有する光源であることが好ましい。このような光源としては、例えば、低圧水銀灯、中圧水銀灯、高圧水銀灯、超高圧水銀灯、ケミカルランプ、ブラックライトランプ、マイクロウェーブ励起水銀灯、メタルハライドランプが挙げられる。
積層体(偏光板)4を巻き取る張力は、特に制限されないが、30〜150N/cm2の範囲内であることが好ましく、30〜120N/cm2の範囲内であることがより好ましい。積層体4を巻き取る張力が30N/cm2未満である場合には、長尺のロール巻きを移送する際、巻きズレが起きる虞があるためであり、150N/cm2より大きい場合には、巻き締まりが強く、タルミが発生し易い傾向にあるためである。
(偏光フィルムの作製)
ポリビニルアルコールの原反フィルムとしては、重合度2400、ケン化度99.9モル%、厚み75μm、幅3000mmの長尺のポリビニルアルコールフィルム「ビニロンVF−PS#7500(クラレ製)」を用いた。延伸は、処理槽前後の駆動ニップロールに周速差をつけて行った。
透明フィルムとして、厚さ75μmのシクロオレフィン系樹脂フィルム「ゼオノア(ZEONOR)」(日本ゼオン(株)製)と厚さ80μmのトリアセチルセルロースフィルム「KC8UX2MW」(コニカミノルタ社製)とを準備した。
実施例1で用いた一対の貼合ロールによるニップ圧を、圧力測定フィルム(富士フィルム製のプレスケール、ツーシートタイプ、超低圧用)を用いて測定したところ、ニップ圧の分布は幅方向にほぼ均一であった。また、作製した偏光板を評価したところ、気泡は観察されなかった。結果を表1に示す。
本実施例において、一方が金属製のフラットロール(直径が300mm)で、もう一方が中央部の直径と端部の直径との差の比率がロールの長さに対して0.008%のゴム製のクラウンロール(中央部の直径が300mm、端部の直径が299.89mm、長さが1300mm)である一対の貼合ロールを用い、軸の両端に押圧の外力を加えてニップした。それ以外は、実施例1と同様にして偏光板を作製した。
(貼合ロールのニップ圧分布および偏光板の気泡の評価)
実施例2の貼合ロールのニップ圧を、圧力測定フィルム(富士フィルム製のプレスケール、ツーシートタイプ、超低圧用)を用いて測定したところ、ニップ圧の分布は幅方向にほぼ均一であった。また、作製した偏光板を評価したところ、気泡は観察されなかった。結果を表1に示す。
本比較例において、一方が金属製のフラットロールで、もう一方がゴム製のフラットロールで、共に直径が200mmである一対の貼合ロールを用い、軸の両端に押圧の外力を加えてニップした。それ以外は、実施例1と同様にして偏光板を作製した。
(貼合ロールのニップ圧分布および偏光板の気泡の評価)
比較例1の貼合ロールのニップ圧を、圧力測定フィルム(富士フィルム製のプレスケール、ツーシートタイプ、超低圧用)を用いて測定したところ、ニップ圧の分布は幅方向の変動が大きかった。また、作製した偏光板を評価したところ、気泡が観察された。結果を表1に示す。
Claims (8)
- 偏光フィルムの片面または両面に透明フィルムが貼合されてなる偏光板の製造方法であって、
前記透明フィルムの片面または前記偏光フィルムの片面もしくは両面に、粘度1000mPa・s以下の活性エネルギー線硬化型の接着剤を塗布する接着剤塗工工程と、
前記透明フィルムが前記偏光フィルムの片面または両面に前記接着剤を介して積層されてなる積層体を、搬送方向に回転する一対の貼合ロールの間に挟んだ状態で、少なくとも一方の貼合ロールを他方の貼合ロールの方向に押圧することで、前記透明フィルムと前記偏光フィルムとを貼合する貼合工程と、
前記貼合工程を経た前記積層体に活性エネルギー線を照射して前記接着剤を硬化させる活性エネルギー線照射工程とを備え、
前記一対の貼合ロールの一方は、中央部から端部にかけて径が小さくなるテーパー状の外周形状を有するクラウンロールであり、
一対の前記貼合ロールがそれぞれ独立で駆動し、
前記積層体の液晶パネルに貼合される面側に配置された前記貼合ロールの周速度が反対側の前記貼合ロールの周速度よりも速く、
前記反対側の貼合ロールの周速度を1としたとき、一方の貼合ロールの周速度の比が、1.0050〜1.200であり、
押圧される前記貼合ロールが金属製のフラットロールであり、他方の前記貼合ロールがゴム製のクラウンロールであることを特徴とする、偏光板の製造方法。 - 前記貼合工程において前記押圧が行われた状態で、前記クラウンロールと前記フラットロールの間隔が実質的に均一になるように、前記クラウンロールの形状が設計されている、請求項1に記載の偏光板の製造方法。
- 前記クラウンロールの中央部の直径と端部の直径との差の比率が、前記クラウンロールの長さに対して0.002%以上である、請求項1に記載の偏光板の製造方法。
- 前記クラウンロールの中央部の直径と端部の直径との差の比率が、前記クラウンロールの長さに対して0.005〜0.040%である、請求項1に記載の偏光板の製造方法。
- 前記クラウンロールの前記テーパー状の外周形状が円弧状である、請求項1に記載の偏光板の製造方法。
- 前記押圧の外力は、前記貼合ロールの軸の両端に加えられる、請求項1に記載の偏光板の製造方法。
- 前記偏光フィルムが連続的に繰り出されたものであり、前記透明フィルムが連続的に繰り出されたものである、請求項1に記載の偏光板の製造方法。
- 偏光フィルムの片面または両面に透明フィルムが貼合されてなる偏光板の製造装置であって、
前記透明フィルムの片面または前記偏光フィルムの片面もしくは両面に、粘度1000mPa・s以下の活性エネルギー線硬化型の接着剤を塗布するための接着剤塗工装置と、
前記透明フィルムが前記偏光フィルムの片面または両面に前記接着剤を介して積層されてなる積層体を、搬送しながら挟圧することにより、前記透明フィルムと前記偏光フィルムとを貼合するための一対の貼合ロールと、
前記一対の貼合ロールを通過した前記積層体に、活性エネルギー線を照射して前記接着剤を硬化させるための活性エネルギー線照射装置とを備え、
前記一対の貼合ロールの一方は、中央部から端部にかけて径が小さくなるテーパー状の外周形状を有するクラウンロールであり、
一対の前記貼合ロールがそれぞれ独立で駆動し、
前記積層体の液晶パネルに貼合される面側に配置された前記貼合ロールの周速度が反対側の前記貼合ロールの周速度よりも速く、
前記反対側の貼合ロールの周速度を1としたとき、一方の貼合ロールの周速度の比が、1.0050〜1.200であり、
押圧される前記貼合ロールが金属製のフラットロールであり、他方の前記貼合ロールがゴム製のクラウンロールであることを特徴とする、偏光板の製造装置。
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WO2017065149A1 (ja) * | 2015-10-15 | 2017-04-20 | 住友化学株式会社 | 光学フィルムの搬送方法及び偏光板の製造方法 |
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JP2014199284A (ja) * | 2013-03-29 | 2014-10-23 | 日東電工株式会社 | 偏光板の製造方法、偏光板、光学フィルム、及び、画像表示装置 |
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TWI733913B (zh) * | 2017-10-03 | 2021-07-21 | 日商住友化學股份有限公司 | 樹脂膜的搬送方法 |
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JP2021081561A (ja) * | 2019-11-19 | 2021-05-27 | 日東電工株式会社 | 偏光子の製造方法 |
KR102370935B1 (ko) * | 2020-07-30 | 2022-03-10 | 주식회사 서연이화 | 플라스틱 글레이징의 제조방법 |
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JP2006058322A (ja) * | 2004-08-17 | 2006-03-02 | Nippon Zeon Co Ltd | 偏光板及び液晶表示装置 |
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PL2093041T3 (pl) * | 2006-10-17 | 2013-08-30 | Nitto Denko Corp | Sposób przyklejania elementu optycznego i urządzenie wykorzystujące ten sposób |
JP4947638B2 (ja) * | 2007-01-12 | 2012-06-06 | 極東産機株式会社 | ラミネート装置 |
JP2008272983A (ja) * | 2007-04-26 | 2008-11-13 | Fujifilm Corp | シクロオレフィン樹脂フィルムの製造方法およびシクロオレフィン樹脂フィルム、ならびに、偏光板、光学補償フィルム、反射防止フィルムおよび液晶表示装置 |
JP4861968B2 (ja) * | 2007-11-30 | 2012-01-25 | 住友化学株式会社 | 偏光板の製造方法 |
JP5061309B2 (ja) * | 2008-07-22 | 2012-10-31 | フジコピアン株式会社 | 光硬化型接着剤組成物を用いた偏光板 |
JP2011022202A (ja) * | 2009-07-13 | 2011-02-03 | Sumitomo Chemical Co Ltd | 偏光板およびそれを用いた画像表示装置 |
JP5399890B2 (ja) * | 2009-12-28 | 2014-01-29 | 住友化学株式会社 | 偏光板の製造方法 |
JP2012053078A (ja) * | 2010-08-31 | 2012-03-15 | Sumitomo Chemical Co Ltd | 偏光板の製造方法 |
WO2013047480A1 (ja) * | 2011-09-26 | 2013-04-04 | 住友化学株式会社 | 偏光板の製造方法 |
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WO2017065149A1 (ja) * | 2015-10-15 | 2017-04-20 | 住友化学株式会社 | 光学フィルムの搬送方法及び偏光板の製造方法 |
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CN103814311A (zh) | 2014-05-21 |
JP2013080219A (ja) | 2013-05-02 |
TW201326918A (zh) | 2013-07-01 |
WO2013042681A1 (ja) | 2013-03-28 |
CN103814311B (zh) | 2016-02-24 |
KR20140069174A (ko) | 2014-06-09 |
TWI548897B (zh) | 2016-09-11 |
WO2013042681A9 (ja) | 2013-05-30 |
KR101945572B1 (ko) | 2019-02-07 |
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