TW202212156A - Method for manufacturing optical laminate and manufacturing device of optical laminate - Google Patents

Method for manufacturing optical laminate and manufacturing device of optical laminate Download PDF

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TW202212156A
TW202212156A TW110115601A TW110115601A TW202212156A TW 202212156 A TW202212156 A TW 202212156A TW 110115601 A TW110115601 A TW 110115601A TW 110115601 A TW110115601 A TW 110115601A TW 202212156 A TW202212156 A TW 202212156A
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heat medium
roll
main passage
roller
passage
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TW110115601A
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Chinese (zh)
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三浦秀宣
門英昭
宮村勲
石渡和孝
大瀧雅士
久米悦夫
倉本賢尚
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日商住友化學股份有限公司
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Publication of TW202212156A publication Critical patent/TW202212156A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • 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
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14Joining 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
    • B29C65/16Laser beams
    • B29C65/1603Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1606Ultraviolet [UV] radiation, e.g. by ultraviolet excimer lasers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • G02B5/3025Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033Polarisers, 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
    • G02B5/3041Polarisers, 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00Flat articles, e.g. films or sheets
    • B29L2007/002Panels; Plates; Sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B2037/1253Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Polarising Elements (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)

Abstract

An object of the present invention is to provide a method for manufacturing an optical laminate which can reduce the temperature unevenness in the width direction of a surface of roll and reduce a problem of the quality of bonded film, and a manufacturing device of the optical laminate.
The method for manufacturing the optical laminate comprises a bonding step of forming a bonding film by bonding two films different from each other via an energy ray-active adhesive, and an activation treatment step of irradiating the bonding film with energy rays on the roll while bringing the bonding film into contact with the roll to activate the adhesive;
wherein a heat medium flow path through which the heat medium flows is provided inside the roll, the roll has a roll body portion in which the roll center line coincides with the rotation axis and the outer peripheral surface portion extends in a cylindrical shape, and the temperature of the surface of the roll is regulated by the heat medium circulation means for circulating the heat medium in the heat medium flow path;
The heat medium flow path has a main passage extending along the axis of rotation so as to correspond to the entire outer peripheral surface of the roll body, an introduction passage which extends on the axis of rotation and communicates with the main passage to introduce a heat medium into the main passage, a first discharge passage which extends on the axis of rotation and communicates with the main passage to discharge the heat medium that has flowed into the main passage, and a second discharge passage in which one end communicates with the main passage on the downstream side of the main passage and at a position close to the outer peripheral surface, while the other end communicates with the first discharge passage; and
the activation treatment step contains an operation of flowing a heat medium into the heat medium flow path while rotating the roll main body.

Description

光學積層體的製造方法及光學積層體的製造裝置 Manufacturing method of optical laminated body and manufacturing apparatus of optical laminated body

本發明係關於一種光學積層體之製造方法及光學積層體之製造裝置。 The present invention relates to a method for producing an optical laminate and an apparatus for producing the optical laminate.

在偏光板等之光學積層體的製造中,係使構成光學積層體之各層的光學膜以能量線活性型之接著劑貼合後,一邊輸送所得到之貼合膜一邊進行活化處理。該活化處理係藉由對通過輥上之貼合膜照射能量線來進行。該能量線之照射係為免產生貼合膜之變形或硬化不均等貼合膜品質之問題,通常,一邊在經冷卻之輥上冷卻貼合膜一邊進行。 In the manufacture of optical laminates such as polarizing plates, after bonding the optical films constituting each layer of the optical laminate with an energy ray-active adhesive, activation treatment is performed while conveying the resulting bonded films. This activation treatment is performed by irradiating energy rays to the bonding film passing over the roll. Irradiation of this energy ray is usually performed while cooling the laminated film on a cooled roll in order to avoid problems of the quality of the laminated film such as deformation of the laminated film or uneven hardening.

以往,就輥之冷卻方法而言,例如,如日本特開2019-3210號公報(專利文獻1)所示,已知有在輥內使熱介質流動。 Conventionally, as a method of cooling a roll, for example, as shown in JP 2019-3210 A (Patent Document 1), it is known to flow a heat medium in a roll.

[先前技術文獻] [Prior Art Literature]

[專利文獻] [Patent Literature]

[專利文獻1]日本特開2019-3210號公報 [Patent Document 1] Japanese Patent Laid-Open No. 2019-3210

然而,如以往,在輥內使熱介質流動時,在輥之表面的寬度方向,恐有產生溫度不均之虞。接著,輥表面之寬度方向的溫度不均係在貼合膜之寬度方向使接著劑之反應速度不均,恐有產生貼合膜品質之問題之虞。 However, when the heat medium is flowed in the roll as in the past, there is a fear that temperature unevenness occurs in the width direction of the surface of the roll. Next, the temperature nonuniformity in the width direction of the roll surface causes the reaction rate of the adhesive to be nonuniform in the width direction of the bonding film, which may cause a problem of the quality of the bonding film.

因此,本揭示在於提供一種降低輥表面之寬度方向的溫度不均,而降低貼合膜的品質問題之光學積層體的製造方法及光學積層體之製造裝置。 Therefore, the present disclosure is to provide a method for producing an optical layered product and an apparatus for producing an optical layered product, which reduce the temperature unevenness in the width direction of the roll surface and reduce the quality problem of the bonding film.

對於前述問題,本案發明人等發現溫度不均之發生是因伴隨熱介質之循環的氣體所造成,終於完成本案發明。 With regard to the aforementioned problems, the inventors of the present application found that the occurrence of temperature unevenness was caused by the gas accompanying the circulation of the heat medium, and finally completed the present invention.

本發明之光學積層體的製造方法,係至少具有1層由光學膜所構成的層之光學積層體的製造方法,其具備: The method for producing an optical laminate of the present invention is a method for producing an optical laminate having at least one layer composed of an optical film, comprising:

貼合步驟,係使互為不同之2片膜隔著能量線活性型之接著劑而貼合,並形成貼合膜; The step of laminating is to make two films different from each other stick together through the adhesive of the energy ray active type, and form a lamination film;

活化處理步驟,係一邊使前述貼合膜接觸輥,一邊在前述輥上對前述貼合膜照射能量線,而進行前述接著劑之活化處理; In the activation treatment step, the bonding film is irradiated with energy rays on the roller while the bonding film is brought into contact with the roller, and the activation treatment of the adhesive is performed;

在前述輥之內部係設有使熱介質流動之熱介質流徑,前述輥係具備「輥中心線與旋轉軸心一致以及外周面部延伸成圓筒狀」之輥本體部,藉由在 前述熱介質流徑使前述熱介質循環之熱介質循環手段,以調節前述輥之表面的溫度; The inside of the roller is provided with a heat medium flow path for the heat medium to flow, and the roller system has a roller body portion whose "roll center line is aligned with the rotation axis and the outer peripheral surface extends in a cylindrical shape". The heat medium circulation means for circulating the heat medium through the heat medium flow path, so as to adjust the temperature of the surface of the roller;

前述熱介質流徑係具備:主通路,係沿著前述旋轉軸心而以對應於前述輥本體部之外周面部的全區域之方式延伸;導入通路,係在前述旋轉軸心上延伸且連通於前述主通路而在前述主通路導入前述熱介質;第1排出通路,係在前述旋轉軸心上延伸且連通於前述主通路而排出在該主通路流動之熱介質;第2排出通路,係一端在前述主通路之下游側,且連通於接近前述外周面部之位置的主通路,另一方面,另一端連通於前述第1排出通路; The heat medium flow path is provided with: a main passage extending along the rotational axis so as to correspond to the entire area of the outer peripheral surface of the roller body; and an introduction passage extending on the rotational axis and communicating with the roller body. The main passage is used to introduce the heat medium into the main passage; the first discharge passage is extended on the rotation axis and communicated with the main passage to discharge the heat medium flowing in the main passage; the second discharge passage is one end On the downstream side of the main passage, and communicated with the main passage at a position close to the outer peripheral surface portion, on the other hand, the other end is communicated with the first discharge passage;

前述活化處理步驟係包含:一邊使前述輥本體部旋轉,一邊在前述熱介質流徑內使熱介質流動之操作。 The activation treatment step includes an operation of causing a heat medium to flow in the heat medium flow path while rotating the roll body.

若依據前述態樣,活化處理步驟係因包含一邊使輥本體部旋轉,一邊在熱介質流徑內使熱介質流動之操作,故可一邊使主通路內之氣體從第2排出通路排出,一邊在輥本體部內使熱介質流動。藉此,可降低起因於輥內之氣體在輥之表面的寬度方向之溫度不均,在貼合膜之寬度方向使接著劑之反應速度略呈均一,並降低貼合膜之品質的問題。 According to the above-mentioned aspect, since the activation treatment step includes the operation of causing the heat medium to flow in the heat medium flow path while rotating the roll body, it is possible to discharge the gas in the main passage from the second discharge passage while The heat medium flows in the roll body. Thereby, the temperature unevenness in the width direction of the surface of the roller caused by the gas in the roll can be reduced, the reaction speed of the adhesive in the width direction of the lamination film can be made slightly uniform, and the quality of the lamination film can be reduced.

又,本發明之光學積層體的製造方法,係至少具有1層由光學膜所構成的層之光學積層體的製造方法,其具備: Moreover, the manufacturing method of the optical laminated body of this invention is the manufacturing method of the optical laminated body which has at least 1 layer which consists of an optical film, and comprises:

貼合步驟,係使互為不同之2片膜隔著能量線活性型之接著劑而貼合,並形成貼合膜; The step of laminating is to make two films different from each other stick together through the adhesive of the energy ray active type, and form a lamination film;

活化處理步驟,係一邊使前述貼合膜接觸輥,一邊在前述輥上對前述貼合膜照射能量線,而進行前述接著劑之活化處理; In the activation treatment step, the bonding film is irradiated with energy rays on the roller while the bonding film is brought into contact with the roller, and the activation treatment of the adhesive is performed;

在前述輥之內部係設有使熱介質流動之熱介質流徑,前述輥係具備「輥中心線與旋轉軸心一致以及外周面部延伸成圓筒狀」之輥本體部,藉由在前述熱介質流徑使前述熱介質循環之熱介質循環手段,以調節前述輥之表面的溫度; The inside of the roller is provided with a heat medium flow path for the heat medium to flow, and the roller system has a roller body portion with "the center line of the roller coincides with the rotation axis and the outer peripheral surface extends in a cylindrical shape". The medium flow path makes the heat medium circulation means to circulate the heat medium to adjust the temperature of the surface of the roller;

前述熱介質流徑係具備:主通路,係沿著前述旋轉軸心而以對應於前述輥本體部之外周面部的全部區域之方式延伸;排出通路,係排出在前述主通路流動之熱介質; The heat medium flow path includes: a main passage extending along the axis of rotation so as to correspond to the entire area of the outer peripheral surface of the roller body; a discharge passage for discharging the heat medium flowing in the main passage;

前述活化處理步驟係包含一邊使前述輥本體部旋轉,一邊使熱介質在前述熱介質流徑內流動之操作,在前述主通路內流動之熱介質的體積係維持在前述主通路之總容積的90%以上100%以下。 The activation treatment step includes an operation of making the heat medium flow in the heat medium flow path while rotating the roll body, and the volume of the heat medium flowing in the main passage is maintained at a volume equal to the total volume of the main passage. More than 90% and less than 100%.

若依據前述態樣,活化處理步驟係包含一邊使輥本體部旋轉,一邊在熱介質流徑內使熱介質流動之操作,在主通路內流動之熱介質的體積係因維持於主通路之總容積的90%以上100%以下,故可一邊使主通路內之氣體從排出通路排出,一邊在輥本體部內使熱介質流動。藉此,可降低起因於輥內之氣體在輥之表面的寬度方向之溫度不均,並在貼合膜之寬度方向使接著劑之反應速度略呈均一,以降低貼合膜之品質的問題。 According to the aforementioned aspect, the activation treatment step includes the operation of causing the heat medium to flow in the heat medium flow path while rotating the roller body, and the volume of the heat medium flowing in the main passage is maintained at the total volume of the main passage. Since the volume is 90% or more and 100% or less, the heat medium can flow in the roller body while the gas in the main passage is discharged from the discharge passage. Thereby, the temperature unevenness in the width direction of the surface of the roller caused by the gas in the roller can be reduced, and the reaction speed of the adhesive in the width direction of the lamination film can be slightly uniform, so as to reduce the quality of the lamination film. .

光學積層體之製造方法的一實施型態,較佳係前述活化處理步驟在使前述輥本體部之表面的寬度方向之溫度分布維持在3.5℃以下之狀態進行。 In one embodiment of the method for producing an optical laminate, the activation treatment step is preferably performed in a state where the temperature distribution in the width direction of the surface of the roll body portion is maintained at 3.5° C. or lower.

若依據前述實施型態,活化處理步驟係因使輥本體部之表面的寬度方向之溫度分布維持在3.5℃以下之狀態進行,故可更降低輥之表面的寬度方向之溫度不均,而更降低貼合膜之品質的問題。 According to the above-mentioned embodiment, the activation treatment step is performed so that the temperature distribution in the width direction of the surface of the roller body is maintained at 3.5°C or lower, so that the temperature unevenness in the width direction of the surface of the roller can be further reduced, and more The problem of reducing the quality of the lamination film.

光學積層體之製造方法之一實施型態係包含在獲得活化處理之貼合膜33上照射能量線之步驟。 One embodiment of the manufacturing method of an optical laminated body includes the step of irradiating the energy ray on the bonding film 33 which obtained the activation process.

若依據前述實施型態,因更包含在經活化處理之貼合膜上照射能量線之步驟,故可更確實地進行接著劑之活化處理。 According to the above-mentioned embodiment, since the step of irradiating the energy ray on the activated lamination film is further included, the activation treatment of the adhesive can be performed more reliably.

又,本揭示之一態樣的光學積層體之製造裝置,係至少具有1層由光學膜所構成的層之光學積層體之製造裝置,其具備: Moreover, the manufacturing apparatus of the optical laminated body which concerns on one aspect of this disclosure is the manufacturing apparatus of the optical laminated body which has at least one layer which consists of an optical film, and is provided with:

貼合裝置,係使互為不同之2片膜隔著能量線活性型之接著劑而貼合,並形成貼合膜; The laminating device is for laminating two mutually different films through an energy ray-active adhesive to form a laminating film;

輥,係接觸於前述貼合膜; A roller is in contact with the aforementioned laminating film;

活化處理裝置,係一邊在前述輥上對前述貼合膜照射能量線,而進行前述接著劑之活化處理; The activation treatment device is to perform activation treatment of the adhesive agent while irradiating the bonding film with energy rays on the roller;

在前述輥之內部係設有使熱介質流動之熱介質流徑,前述輥係具備「輥中心線與旋轉軸心一致以及外周面部延伸成圓筒狀」之輥本體部,藉由在前述熱介質流徑使前述熱介質循環之熱介質循環手段,以調節前述輥之表面的溫度; The inside of the roller is provided with a heat medium flow path for the heat medium to flow, and the roller system has a roller body portion with "the center line of the roller coincides with the rotation axis and the outer peripheral surface extends in a cylindrical shape". The medium flow path makes the heat medium circulation means to circulate the heat medium to adjust the temperature of the surface of the roller;

前述熱介質流徑係具備:主通路,係沿著前述旋轉軸心而以對應於前述輥本體部之外周面部的全部區域之方式延伸;導入通路,係在前述旋轉軸心上延伸且連通於前述主通路而在前述主通路導入前述熱介質;第1排出通路,係在前述旋轉軸心上延伸且連通於前述主通路而排出在該主通路流動之熱介質;第2排出通路,係一端在前述主通路之下游側,且連通於接近前述外周面部之位置的主通路,另一方面,另一端連通於前述第1排出通路。 The heat medium flow path is provided with a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body portion, and an introduction passage extending on the rotation axis and communicating with the rotation axis. The main passage is used to introduce the heat medium into the main passage; the first discharge passage is extended on the rotation axis and communicated with the main passage to discharge the heat medium flowing in the main passage; the second discharge passage is one end On the downstream side of the main passage, it communicates with the main passage at a position close to the outer peripheral surface portion, and the other end communicates with the first discharge passage.

若依據前述態樣,輥之熱介質流徑係因具有連通於主通路之第2排出通路,故可一邊從第2排出通路排出主通路內之氣體,一邊在輥本體部內使熱介質流動。藉此,可降低起因於輥內之氣體在輥之表面的寬度方向之溫度不均,而在貼合膜之寬度方向使接著劑之反應速度略呈均一,以降低貼合膜之品質的問題。 According to the above aspect, since the heat medium flow path of the roller has the second discharge passage communicating with the main passage, the heat medium can flow in the roller body while discharging the gas in the main passage from the second discharge passage. In this way, the temperature unevenness of the gas in the roll in the width direction of the surface of the roll can be reduced, and the reaction speed of the adhesive in the width direction of the lamination film can be slightly uniform, so as to reduce the quality of the lamination film. .

較佳係在光學積層體之製造裝置之一實施型態中,更具有控制裝置,該控制裝置係藉由前述活化處理裝置進行前述接著劑之活化處理時,控制於:使前述輥本體部之表面的寬度方向之溫度分布維持在3.5℃以下之狀態。 Preferably, in one embodiment of the manufacturing apparatus of the optical layered body, it is further provided with a control device, which controls the activation of the adhesive agent by the activation treatment device so as to cause the roller body part to be activated. The temperature distribution in the width direction of the surface was maintained at 3.5°C or lower.

若依據前述實施型態,藉由活化處理裝置進行接著劑之活化處理時,可藉由控制輥本體部之表面的寬度方向之溫度分布,更降低輥之表面的寬度方向之溫度不均,而更降低貼合膜之品質的問題。 According to the above-mentioned embodiment, when the activation treatment of the adhesive is performed by the activation treatment device, the temperature distribution in the width direction of the surface of the roller body portion can be controlled to further reduce the temperature unevenness of the surface of the roller in the width direction, and It also reduces the quality of the lamination film.

較佳係在光學積層體之製造裝置之一實施型態中,前述輥本體部具有外管與內管, Preferably, in an embodiment of the apparatus for manufacturing the optical laminate, the roller body has an outer tube and an inner tube,

前述外管與前述內管之間的空間為構成前述熱介質流徑之一部分。 The space between the outer tube and the inner tube constitutes a part of the flow path of the heat medium.

若依據前述實施型態,因外管與內管之間的空間為構成熱介質流徑之一部分,故可為熱介質僅在外管內之一部分的空間流動之構成。因此,與徑相同之單管的輥相比較,可以更少之熱介質的量增加流速。 According to the above-mentioned embodiment, since the space between the outer tube and the inner tube constitutes a part of the flow path of the heat medium, the heat medium can only flow in a part of the space in the outer tube. Therefore, the flow rate can be increased by a smaller amount of heat medium than with a single-pipe roll of the same diameter.

較佳係在光學積層體之製造裝置之一實施型態中,設有2個以上之前述第2排出通路。 Preferably, in one embodiment of the manufacturing apparatus of an optical laminated body, two or more said 2nd discharge paths are provided.

若依據前述實施型態,因設有2個以上之第2排出通路,故可有效率地排出氣體。 According to the above-mentioned embodiment, since two or more second discharge passages are provided, the gas can be discharged efficiently.

較佳係在光學積層體之製造裝置之一實施型態中,前述第2排出通路為等間隔地設於前述旋轉軸心周圍。 Preferably, in one embodiment of the apparatus for manufacturing the optical laminate, the second discharge passages are provided around the rotation axis at equal intervals.

若依據前述實施型態,在輥之旋轉運作時,各第2排出通路形成為以短間隔通過輥上部之氣池,從而使輥之每一旋轉的主通路之上部聚集的氣體之排出時間增加,可有效地在主通路上充滿熱介質。 According to the aforementioned embodiment, each of the second discharge passages is formed to pass through the gas pool on the upper part of the roll at short intervals during the rotation operation of the roll, so that the discharge time of the gas accumulated on the upper part of the main passage of each rotation of the roll is increased. , which can effectively fill the main passage with heat medium.

若依據本揭示之一態樣的光學積層體之製造方法及光學積層體之製造裝置,可降低輥之表面的寬度方向之溫度不均,而降低貼合膜之品質的問題。 According to the manufacturing method of an optical laminated body and the manufacturing apparatus of an optical laminated body of one aspect of this disclosure, the temperature unevenness of the width direction of the surface of a roll can be reduced, and the problem of the quality of a bonding film can be reduced.

1:輥裝置 1: Roller device

2:輥 2: Roller

3:熱介質循環單元(熱介質循環手段) 3: Heat medium circulation unit (heat medium circulation means)

4:輥本體部 4: Roller body

4a:外周面部 4a: Peripheral face

4b:端面部 4b: End face

5:軸部 5: Shaft

10:熱介質流徑 10: Heat medium flow path

10a:主通路 10a: Main Path

10b:導入通路 10b: Import Pathway

10c:第1排出通路 10c: 1st discharge passage

10d:第2排出通路 10d: Second discharge passage

11:接著劑塗佈裝置 11: Adhesive coating device

13:活化處理裝置 13: Activation treatment device

15:光學積層體之製造裝置 15: Manufacturing equipment for optical laminates

16:貼合裝置 16: Fitting device

17:控制裝置 17: Controls

20:捲繞輥 20: Winding roller

21:第1貼合輥 21: The first bonding roller

22:第2貼合輥 22: The second bonding roller

31:第1膜(偏光膜) 31: The first film (polarizing film)

32:第2膜(透明膜) 32: Second film (transparent film)

33:貼合膜 33: Lamination film

34:光學積層體(偏光板) 34: Optical laminate (polarizing plate)

50:輥 50: Roller

51:外管(輥本體部) 51: Outer tube (roller body)

51a:外周面部 51a: Peripheral face

52:內管(輥本體部) 52: Inner tube (roller body part)

53:第1軸部 53: 1st shaft

54:第2軸部 54: 2nd shaft

55:熱介質流徑 55: Heat medium flow path

55a:第1通路(主通路) 55a: 1st channel (main channel)

55b:第2通路(主通路) 55b: 2nd channel (main channel)

55c:第3通路(主通路) 55c: 3rd channel (main channel)

55d:導入通路 55d: Introductory pathway

55e:第1排出通路 55e: 1st discharge passage

55f:第2排出通路 55f: Second discharge passage

C1:旋轉軸心 C1: Rotation axis

圖1係表示光學積層體之製造裝置的一實施型態之概略圖。 FIG. 1 is a schematic diagram showing an embodiment of an apparatus for producing an optical laminate.

圖2係輥之一實施型態的概略剖面圖。 Fig. 2 is a schematic cross-sectional view of one embodiment of the roll.

圖3係在圖2之II-II線的剖面圖。 FIG. 3 is a cross-sectional view taken along line II-II of FIG. 2 .

圖4係圖2之III部放大圖。 FIG. 4 is an enlarged view of part III of FIG. 2 .

圖5A係表示輥之其他的實施型態之概略剖面圖。 FIG. 5A is a schematic cross-sectional view showing another embodiment of the roller.

圖5B係圖5A之A-A剖面圖。 FIG. 5B is a cross-sectional view taken along line A-A of FIG. 5A .

以下,藉由圖示之實施型態而詳細說明本揭示之一態樣的光學積層體之製造方法及光學積層體之製造裝置。又,圖式係包含部分示意圖,有時不反映實際之尺寸或比率。 Hereinafter, the manufacturing method of the optical laminated body and the manufacturing apparatus of the optical laminated body of an aspect of this disclosure are demonstrated in detail by the embodiment shown in figure. In addition, the drawings include some schematic diagrams, and sometimes do not reflect the actual size or ratio.

(實施型態) (implementation type)

(光學積層體之製造裝置) (Manufacturing device of optical laminate)

圖1係表示光學積層體之製造裝置的一實施型態之概略圖。如圖1所示,光學積層體之製造裝置15係具備:貼合裝置16,係使互為不同之第1膜31與第2膜32貼合而形成貼合膜33;輥2,係接觸於貼合膜33;活化處理裝置13,係對貼合膜33照射能量線而形成光學積層體34、及控制裝置17,係控制輥2。 FIG. 1 is a schematic diagram showing an embodiment of an apparatus for producing an optical laminate. As shown in FIG. 1, the manufacturing apparatus 15 of the optical laminated body is provided with: the bonding apparatus 16, the 1st film 31 and the 2nd film 32 which are different from each other are bonded together to form the bonding film 33; In the bonding film 33 ; the activation treatment device 13 is used to irradiate the bonding film 33 with energy rays to form the optical layered body 34 , and the control device 17 is used to control the roll 2 .

在該實施型態中,第1膜31為偏光膜等光學膜,第2膜32為透明膜,光學積層體34為偏光板。此等膜係朝圖1之箭號所示的方向輸送。 In this embodiment, the first film 31 is an optical film such as a polarizing film, the second film 32 is a transparent film, and the optical layered body 34 is a polarizing plate. The films were fed in the direction indicated by the arrows in FIG. 1 .

光學膜係偏光膜、相位差膜等顯示光學特性之樹脂膜。偏光膜係例如,對經單軸延伸之聚乙烯醇膜施予以碘或二色性染料所產生之染色,然後進行硼酸處理而形成者。 Optical films are resin films that exhibit optical properties, such as polarizing films and retardation films. The polarizing film is, for example, formed by applying iodine or a dichroic dye to a uniaxially stretched polyvinyl alcohol film, followed by boric acid treatment.

透明膜可列舉非晶性聚烯烴系樹脂膜、聚酯系樹脂膜、丙烯酸系樹脂膜、聚碳酸酯系樹脂膜、聚碸系樹脂膜、脂環式聚醯亞胺系樹脂膜等熱塑性樹脂。透明膜係以透濕度低之樹脂膜為較佳。透明膜係更可列舉三乙醯基纖維素膜或二乙醯基纖維素膜等乙酸纖維素系樹脂膜。 Examples of the transparent film include thermoplastic resins such as amorphous polyolefin-based resin films, polyester-based resin films, acrylic resin films, polycarbonate-based resin films, polysilicon-based resin films, and alicyclic polyimide-based resin films. . The transparent film is preferably a resin film with low moisture permeability. As a transparent film system, a cellulose acetate-type resin film, such as a triacetate cellulose film and a diacetate cellulose film, is mentioned more.

光學膜可為單層,亦可為積層體。光學膜係只要為顯示光學特性之膜即可,其種類並無特別限定。所得到之光學積層體可為具有不顯 示光學特性之膜者,若為顯示光學特性者,例如,可為相位差膜、保護膜、上述偏光膜等光學膜、或積層有此等之膜或熱塑性樹脂之光學積層體。亦即,光學積層體係只要具有至少一層由光學膜所構成的層即可。 The optical film may be a single layer or a laminate. The type of the optical film system is not particularly limited as long as it is a film showing optical properties. The resulting optical laminate may have a As a film showing optical properties, if it is a film showing optical properties, for example, it may be an optical film such as a retardation film, a protective film, the above-mentioned polarizing film, or an optical laminate in which these films or thermoplastic resins are laminated. That is, the optical laminated system should just have at least one layer which consists of an optical film.

貼合裝置16係具有:在第1膜31之單面塗佈接著劑之接著劑塗佈裝置11、使第1膜31與第2膜32重疊並隔著接著劑而貼合之第1貼合輥21及第2貼合輥22。接著劑係能量線活性型之接著劑。 The laminating apparatus 16 includes: the adhesive coating apparatus 11 for coating the adhesive on one side of the first film 31; The bonding roll 21 and the second bonding roll 22 . The adhesive is an energy ray active adhesive.

從耐候性或折射率、陽離子聚合性等之觀點而言,接著劑係例如,使用分子內不含有芳香環之環氧樹脂。環氧樹脂係例如,使用氫化環氧樹脂、脂環式環氧樹脂、脂肪族環氧樹脂等。環氧樹脂中係添加聚合起始劑,例如使以活性能量線照射而聚合用之光陽離子聚合起始劑、藉由加熱而使其聚合用之熱陽離子聚合起始劑、再者其他之添加劑(敏化劑等)。 From the viewpoints of weather resistance, refractive index, cationic polymerizability, and the like, the adhesive is, for example, an epoxy resin that does not contain an aromatic ring in the molecule. As epoxy resins, for example, hydrogenated epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, and the like are used. Polymerization initiators are added to epoxy resins, such as photocationic polymerization initiators for polymerization by irradiation with active energy rays, thermal cationic polymerization initiators for polymerization by heating, and other additives (sensitizers, etc.).

輥2係以輥2之中心線與旋轉軸心一致之方式使旋轉驅動,並使貼合膜33接觸於輥2之表面的同時而輸送。輥2係接觸於貼合膜33。亦即,輥2係從活化處理裝置13對貼合膜33照射能量線時,藉由接觸於貼合膜33而難以對貼合膜33加熱。輥2係在其內部具有使熱介質流動之熱介質流徑,藉由熱介質在熱介質流徑流動,以冷卻貼合膜33。熱介質係例如為水等冷媒。 The roller 2 is driven to rotate so that the center line of the roller 2 coincides with the axis of rotation, and the bonding film 33 is conveyed while being brought into contact with the surface of the roller 2 . The roll 2 is in contact with the bonding film 33 . That is, when the roller 2 irradiates the bonding film 33 with energy rays from the activation treatment device 13 , it is difficult to heat the bonding film 33 by being in contact with the bonding film 33 . The roller 2 has a heat medium flow path through which the heat medium flows, and the bonding film 33 is cooled by the heat medium flowing in the heat medium flow path. The heat medium system is, for example, a refrigerant such as water.

輥2係具備外周面部延伸成圓筒狀之輥本體部。藉由在熱介質流徑使熱介質循環之熱介質循環手段以調節輥2之表面溫度。熱介質循環手段係例如,由包含循環泵等熱介質循環單元所構成,並藉由控制裝置17來控制。 The roller 2 is provided with a roller body portion whose outer peripheral surface portion extends in a cylindrical shape. The surface temperature of the roll 2 is regulated by a heat medium circulation means for circulating the heat medium in the heat medium flow path. The heat medium circulation means is composed of, for example, a heat medium circulation unit including a circulation pump, and is controlled by the control device 17 .

熱介質流徑係具備:主通路,其係沿著旋轉軸心而對應於輥本體部之外周面部之全部區域之方式延伸;導入通路,其係在旋轉軸心上延伸以及連通於主通路而在主通路導入熱介質;第1排出通路,其係在旋轉軸心上延伸以及連通於主通路而排出在該主通路流動之熱介質;第2排出通路,其係一端在主通路之下游側,且連通於接近外周面部之位置的主通路,另一方面,另一端連通於第1排出通路。 The heat medium flow path is provided with: a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body; an introduction passage extending on the rotation axis and communicating with the main passage. The heat medium is introduced into the main passage; the first discharge passage extends on the rotation axis and communicates with the main passage to discharge the heat medium flowing in the main passage; the second discharge passage has one end on the downstream side of the main passage , and communicates with the main passage at a position close to the outer peripheral surface, and on the other hand, the other end communicates with the first discharge passage.

輥2之熱介質流徑係因具有連通於主通路之第2排出通路,故可一邊使主通路內之氣體從第2排出通路排出,一邊在輥本體部內使熱介質流動。氣體例如為空氣。第2排出通路係不僅排出氣體,亦可排出熱介質。因此,可降低起因於輥2內之氣體在輥2之表面的寬度方向之溫度不均,而在貼合膜33之寬度方向使接著劑之反應速度略呈均一,並降低貼合膜33之品質的問題。 Since the heat medium flow path of the roller 2 has a second discharge passage that communicates with the main passage, the heat medium can flow in the roller body portion while the gas in the main passage is discharged from the second discharge passage. The gas is, for example, air. The second exhaust passage system exhausts not only the gas but also the heat medium. Therefore, the temperature unevenness in the width direction of the surface of the roll 2 caused by the gas in the roll 2 can be reduced, the reaction speed of the adhesive agent in the width direction of the lamination film 33 can be made slightly uniform, and the temperature of the lamination film 33 can be reduced. quality issue.

又,第2排出通路因連通於接近外周面部之位置的主通路,故將輥2之旋轉軸心呈水平配置而使用時,可從第2排出通路有效地排出聚集於主通路之外周面部側的氣體。 In addition, since the second discharge passage communicates with the main passage at a position close to the outer peripheral surface, when the rotating shaft center of the roller 2 is horizontally disposed and used, the aggregates can be efficiently discharged from the second discharge passage to the outer peripheral surface side of the main passage. gas.

又,第2排出通路係連通於主通路之下游側,故可依據熱介質之流動而有效率地排出氣體。 In addition, since the second exhaust passage communicates with the downstream side of the main passage, the gas can be efficiently exhausted according to the flow of the heat medium.

輥本體部係例如,可由外管之單管所構成,此時,外管之內部的空間為構成熱介質流徑之一部分(主通路)。又,輥本體部係例如,可由外管與內管之雙管所構成,此時,外管與內管之間的空間係構成熱介質流徑之一部分(主通路)。外管與內管之間的空間係從輥2之旋轉軸心方向觀看,形成為圓環狀。 The roller body may be constituted by, for example, a single tube of the outer tube, and in this case, the space inside the outer tube is a part (main passage) constituting the flow path of the heat medium. In addition, the roller body may be constituted by, for example, a double tube of an outer tube and an inner tube, and in this case, the space between the outer tube and the inner tube constitutes a part (main passage) of the heat medium flow path. The space between the outer tube and the inner tube is formed in an annular shape when viewed from the rotational axis direction of the roller 2 .

活化處理裝置13係朝向輥2而配置。活化處理裝置13係在輥2上對貼合膜33照射能量線,進行接著劑之活化處理。亦即,活化處理裝置13係藉由能量線之照射使接著劑聚合硬化。如此方式,藉由活化處理裝置13之活化處理所形成的光學積層體34係藉由捲繞輥20來捲繞。又,能量線通常不僅照射在輥2上,亦照射在輥2之周邊。 The activation treatment device 13 is arranged toward the roll 2 . The activation treatment device 13 irradiates the bonding film 33 with energy rays on the roll 2 to perform activation treatment of the adhesive. That is, the activation treatment device 13 polymerizes and hardens the adhesive by irradiation of energy rays. In this way, the optical layered body 34 formed by the activation treatment of the activation treatment device 13 is wound by the winding roll 20 . In addition, the energy rays are usually irradiated not only on the roll 2 but also on the periphery of the roll 2 .

活化處理裝置13係例如,在波長400nm以下具有發光分布,使用低壓水銀灯、中壓水銀灯、高壓水銀灯、超高壓水銀灯、化學燈、黑光燈、微波激發水銀灯、金屬鹵素燈等。 The activation treatment device 13 has, for example, a light emission distribution at a wavelength of 400 nm or less, and uses a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultra-high pressure mercury lamp, a chemical lamp, a black light lamp, a microwave excited mercury lamp, a metal halide lamp, or the like.

控制裝置17較佳係藉由活化處理裝置13進行接著劑之活化處理時,將輥本體部之表面的寬度方向之溫度分布(最大溫度差)控制成維持於3.5℃以下,更佳係2℃以下之狀態。亦即,控制裝置17較佳係使輥本體部之表面的寬度方向之最大溫度與輥本體部之表面的寬度方向之最小溫度之差設為3.5℃以下。若依據此,可更降低輥2之表面的寬度方向之溫度不均,而更減少貼合膜33之品質的問題。 The control device 17 preferably controls the temperature distribution (maximum temperature difference) in the width direction of the surface of the roller body to be kept below 3.5°C, more preferably 2°C, when the activation treatment device 13 performs the activation treatment of the adhesive. the following status. That is, the control device 17 preferably sets the difference between the maximum temperature in the width direction of the surface of the roll body and the minimum temperature in the width direction of the surface of the roll body to 3.5°C or less. According to this, the temperature unevenness in the width direction of the surface of the roll 2 can be further reduced, and the problem of the quality of the bonding film 33 can be further reduced.

若具體地敘述,控制裝置17係由中央處理裝置所構成。控制裝置17係例如,藉由控制熱介質循環手段,而調整輥2內之熱介質的流速、輥2內之熱介質的流量、或、輥2內之熱介質量等,以使輥2之表面的寬度方向之溫度分布維持於3.5℃以下。 Specifically, the control device 17 is constituted by a central processing device. The control device 17 adjusts the flow rate of the heat medium in the roll 2, the flow rate of the heat medium in the roll 2, or the amount of heat medium in the roll 2, for example, by controlling the heat medium circulation means, so that the The temperature distribution in the width direction of the surface is maintained at 3.5°C or lower.

較佳係輥本體部具有外管與內管,外管與內管之間的空間為構成熱介質流徑之一部分。若依據此,可為熱介質僅在外管內之部分空間流動之構成,故與徑相同的單管之輥2比較,可以更少的熱介質之量增加流速。 Preferably, the main body of the tie-roller has an outer tube and an inner tube, and the space between the outer tube and the inner tube is a part of the flow path of the heat medium. According to this, the heat medium can flow only in a part of the space inside the outer tube, so that the flow rate can be increased by a smaller amount of heat medium compared with the roller 2 of a single tube with the same diameter.

較佳係第2排出通路設有2個以上。若依據此,第2排出通路之數量變多,可有效地排出氣體。較佳係第2排出通路等間隔地設於旋轉軸心周圍。若依據此,在輥2之旋轉運作時,各第2排出通路以短間隔通過輥上部之氣池,從而使輥2之每一旋轉的主通路之上部聚集的氣體之排出時間增加,可有效地在主通路充滿熱介質。 Preferably, two or more second discharge passages are provided. According to this, the number of the second discharge passages is increased, and the gas can be discharged efficiently. Preferably, the second discharge passages are provided around the rotation axis at equal intervals. According to this, when the roller 2 rotates, the second discharge passages pass through the gas pool on the upper part of the roller at short intervals, so that the discharge time of the gas accumulated on the upper part of the main passage of each rotation of the roller 2 is increased, which can effectively The ground is filled with heat medium in the main passage.

又,本揭示之製造裝置並不限定於上述實施型態,可在不超出本揭示之要旨的範圍變更設計。前述製造裝置係可分別具有2個以上之活化處理裝置或輥。在前述製造裝置中,複數之活化處理裝置係可設置成面向一個輥。 In addition, the manufacturing apparatus of this disclosure is not limited to the above-mentioned embodiment, and the design can be changed in the range which does not deviate from the gist of this disclosure. The said manufacturing apparatus may each have two or more activation processing apparatuses or rolls. In the aforementioned manufacturing apparatus, a plurality of activation treatment apparatuses may be arranged to face one roll.

(光學積層體之製造方法) (Manufacturing method of optical laminate)

然後,使用圖1說明有關光學積層體之製造方法的一實施型態。 Next, an embodiment of the manufacturing method of the optical layered body will be described with reference to FIG. 1 .

首先,將第1膜31及第2膜32隔著能量線活性型之接著劑貼合,而形成貼合膜33。將此稱為貼合步驟。在之後,使貼合膜33接觸於輥2,同時在輥2上對貼合膜33照射能量線,而進行接著劑之活化處理。將此稱為活化處理步驟。 First, the bonding film 33 is formed by bonding the first film 31 and the second film 32 with an energy ray active adhesive interposed therebetween. This is called the fitting step. After that, the bonding film 33 is brought into contact with the roll 2, and the bonding film 33 is irradiated with energy rays on the roll 2, and the activation treatment of the adhesive is performed. This is called an activation treatment step.

在此,在輥2之內部係設有使熱介質流動之熱介質流徑。輥2係具備輥中心線與旋轉軸心成為一致以及外周面部延伸成圓筒狀之輥本體部。藉由在熱介質流徑使熱介質循環之熱介質循環手段,調節輥2之表面溫度。 Here, a heat medium flow path for allowing the heat medium to flow is provided inside the roll 2 . The roll 2 is provided with the roll main body part which the roll center line and the rotating shaft center correspond, and the outer peripheral surface part is extended in a cylindrical shape. The surface temperature of the roller 2 is regulated by the heat medium circulation means for circulating the heat medium in the heat medium flow path.

熱介質流徑係具備:主通路,係沿著旋轉軸心而以對應於輥本體部之外周面部的全部區域之方式延伸;導入通路,係在旋轉軸心上延伸以及連通於主通路而在主通路導入熱介質;第1排出通路,係在旋轉軸 心上延伸以及連通於主通路而排出在該主通路流動之熱介質;第2排出通路,係一端在主通路之下游側,且連通於接近外周面部之位置的主通路,另一方面,另一端連通於第1排出通路。 The heat medium flow path is provided with: a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body; an introduction passage extending on the rotation axis and communicating with the main passage to The main passage introduces heat medium; the first discharge passage is tied to the rotating shaft The second discharge passage is one end on the downstream side of the main passage and communicates with the main passage at a position close to the outer peripheral surface, and on the other hand, the other One end communicates with the first discharge passage.

接著,活化處理步驟係包含使輥本體部旋轉,同時在熱介質流徑內使熱介質流動之操作。 Next, the activation treatment step includes an operation of rotating the roller body while flowing the heat medium in the heat medium flow path.

若依據此,活化處理步驟因包含使輥本體部旋轉,同時在熱介質流徑內使熱介質流動之操作,故可從第2排出通路排出主通路內之氣體,同時在輥本體部內使熱介質流動。因此,可更降低起因於輥2內之氣體在輥2之表面的寬度方向之溫度不均,在貼合膜33之寬度方向使接著劑之反應速度略呈均一,並降低貼合膜33之品質的問題。 According to this, since the activation treatment step includes the operation of rotating the roll body and flowing the heat medium in the heat medium flow path, the gas in the main passage can be discharged from the second discharge passage, and the heat in the roll body can be discharged at the same time. medium flow. Therefore, the temperature unevenness in the width direction of the surface of the roll 2 caused by the gas in the roll 2 can be further reduced, the reaction speed of the adhesive agent in the width direction of the lamination film 33 can be made slightly uniform, and the temperature of the lamination film 33 can be reduced. quality issue.

較佳係在活化處理步驟中,相對於主通路之總容積,在主通路內流動之熱介質的體積係維持在90%以上100%以下,更佳係維持在95%以上100%以下。若依據此,可更降低輥2之表面的寬度方向之溫度不均,而更降低貼合膜33之品質的問題。 Preferably, in the activation treatment step, the volume of the heat medium flowing in the main channel relative to the total volume of the main channel is maintained at 90% or more and 100% or less, more preferably 95% or more and 100% or less. According to this, the temperature unevenness in the width direction of the surface of the roll 2 can be further reduced, and the problem of the quality of the bonding film 33 can be further reduced.

在此,主通路內之氣體的排出量係可藉由適當調節在熱介質流徑內流動之熱介質的流量、輥本體之旋轉速度、各排出通路之剖面積的大小等以進行調整。亦即,可藉由排出主通路內之氣體,調節在主通路內流動之熱介質的體積。只要為本揭示之製造裝置的輥,可容易地調整在主通路內流動之熱介質的體積。 Here, the discharge amount of gas in the main passage can be adjusted by appropriately adjusting the flow rate of the heat medium flowing in the heat medium flow passage, the rotational speed of the roller body, and the size of the cross-sectional area of each discharge passage. That is, the volume of the heat medium flowing in the main passage can be adjusted by exhausting the gas in the main passage. As long as the rollers of the manufacturing apparatus of the present disclosure are used, the volume of the heat medium flowing in the main passage can be easily adjusted.

較佳係活化處理步驟為將輥本體部之表面的寬度方向之溫度分布維持在3.5℃以下(更佳係2℃以下)之狀態來進行。若依據此,可更 降低輥2之表面的寬度方向之溫度不均,而更降低貼合膜33之品質的問題。 The activation treatment step is preferably performed while maintaining the temperature distribution in the width direction of the surface of the roll body at 3.5° C. or lower (more preferably, 2° C. or lower). Based on this, the The problem of reducing the temperature unevenness in the width direction of the surface of the roll 2 and further reducing the quality of the bonding film 33 is reduced.

在上述活化處理步驟中,在貼合膜33上照射複數次之能量線時,通常,使用具備2個以上之活化處理裝置的製造裝置,而進行能量線照射。該能量線照射係一邊通過面向2個以上之活化處理裝置的1個輥一邊進行,亦可使用具有2個以上之面向1個或複數個活化處理裝置之輥的裝置,一邊使貼合膜通過複數個輥而一邊進行。 In the above-mentioned activation treatment step, when the bonding film 33 is irradiated with energy rays a plurality of times, the energy rays are usually irradiated using a manufacturing apparatus equipped with two or more activation treatment apparatuses. This energy ray irradiation is performed while passing through one roll facing two or more activation treatment apparatuses, and an apparatus having two or more rolls facing one or a plurality of activation treatment apparatuses may be used to pass the bonding film through A plurality of rolls are performed while performing.

在本實施型態中,更包含在獲得活化處理之貼合膜33上照射能量線之步驟。藉此,可更確實地進行接著劑之活化處理。 In this embodiment, the step of irradiating energy rays on the activation-treated adhesive film 33 is further included. Thereby, the activation process of an adhesive agent can be performed more reliably.

在本實施型態中,就在與上述活化處理步驟中之輥不同的構成之輥上進行之點而言,在獲得活化處理之貼合膜33上照射能量線之步驟,係與上述活化處理步驟中之能量線照射不同。 In this embodiment, the step of irradiating the bonding film 33 with the activation treatment with energy rays is the same as the activation treatment described above in that it is carried out on a roller having a different configuration from that in the activation treatment step described above. The energy ray irradiation in the steps is different.

又,本揭示之製造方法係不限定於上述實施型態,可在不超出本揭示之要旨的範圍變更設計。例如,本揭示之製造方法係不限於藉由圖1之製造裝置15所實現,而亦可藉由其他之不同的裝置來實現。 In addition, the manufacturing method of this disclosure is not limited to the above-mentioned embodiment, and the design can be changed in the range which does not deviate from the gist of this disclosure. For example, the manufacturing method of the present disclosure is not limited to be implemented by the manufacturing device 15 of FIG. 1 , but can also be implemented by other different devices.

又,光學積層體之製造方法之另一實施型態係具備貼合步驟與活化處理步驟,在輥之內部係設有使熱介質流動之熱介質流徑,輥係具備:輥中心線與旋轉軸心一致以及外周面部延伸成圓筒狀延伸之輥本體部,藉由在熱介質流徑使前述熱介質循環之熱介質循環手段以調節前述輥之表面溫度。熱介質流徑係具備:主通路,其係沿著旋轉軸心而對應於輥本體部之外周面部的全部區域之方式延伸;及,排出通路,其係排出在主通路流動之熱介質。亦即,排出通路係不限定於前述第1排出通路及前述 第2排出通路,例如,可不為前述第2排出通路。活化處理步驟係包含一邊使輥本體部旋轉,一邊在熱介質流徑內使熱介質流動之操作。在活化處理步驟中,在主通路內流動之熱介質的體積係維持於主通路之總容積的90%以上100%以下,較佳係維持於95%以上100%以下。 Moreover, another embodiment of the manufacturing method of an optical layered body includes a bonding step and an activation treatment step, a heat medium flow path for allowing a heat medium to flow is provided inside the roll, and the roll system includes: a roll center line and a rotation The roller body part with the same shaft center and the outer peripheral surface extending in a cylindrical shape adjusts the surface temperature of the roller by means of a heat medium circulation which circulates the heat medium in the heat medium flow path. The heat medium flow path includes a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body portion, and a discharge passage for discharging the heat medium flowing in the main passage. That is, the discharge passage is not limited to the aforementioned first discharge passage and the aforementioned For example, the second discharge passage may not be the aforementioned second discharge passage. The activation treatment step includes an operation of flowing the heat medium in the heat medium flow path while rotating the roll body. In the activation treatment step, the volume of the heat medium flowing in the main passage is maintained at 90% or more and 100% or less of the total volume of the main passage, preferably 95% or more and 100% or less.

若依據此,可從排出通路排出主通路內之氣體,同時在輥本體部內使熱介質流動。因此,可降低起因於輥內之氣體在輥之表面的寬度方向之溫度不均,而在貼合膜之寬度方向使接著劑之反應速度略呈均一,並降低貼合膜之品質的問題。 According to this, the gas in the main passage can be discharged from the discharge passage, and at the same time, the heat medium can flow in the roller body. Therefore, it is possible to reduce the temperature unevenness in the width direction of the surface of the roll caused by the gas in the roll, and to make the reaction rate of the adhesive slightly uniform in the width direction of the lamination film, and reduce the quality of the lamination film.

(輥之構造) (Construction of Roller)

圖2係具備可應用於本揭示之製造方法的輥之裝置之一例(以下,有時將本輥稱為「輥裝置1」。)之概略剖面圖。如圖2所示,輥裝置1係用以相接於被連續輸送的貼合膜W1(圖1之貼合膜33)而調整該貼合膜W1之溫度者。輥裝置1係包含於前述光學積層體之製造裝置15中。 FIG. 2 is a schematic cross-sectional view of an example of an apparatus equipped with a roll applicable to the manufacturing method of the present disclosure (hereinafter, this roll may be referred to as a "roll apparatus 1".). As shown in FIG. 2 , the roller device 1 is used to adjust the temperature of the bonding film W1 in contact with the continuously conveyed bonding film W1 (the bonding film 33 in FIG. 1 ). The roll apparatus 1 is contained in the manufacturing apparatus 15 of the said optical laminated body.

輥裝置1係具備:上述輥2,其係在內部具有熱介質H1流通之熱介質流徑10、且可在旋轉軸心C1周圍旋轉;及,熱介質循環單元3(前述熱介質循環手段),其係在熱介質流徑10使熱介質H1循環。 The roller device 1 is provided with: the above-mentioned roller 2, which has a heat medium flow path 10 inside which the heat medium H1 flows, and is rotatable around the rotation axis C1; and a heat medium circulation unit 3 (the aforementioned heat medium circulation means) , which circulates the heat medium H1 in the heat medium flow path 10 .

輥2係具備:輥本體部4,其係藉由金屬材所形成,且輥中心線與旋轉軸心C1一致以及外周面部4a延伸成圓筒狀;一對軸部5,其係分別一體地設置在該輥本體部4之各端面部4b,且軸中心線與旋轉軸心C1一致;一對旋轉接頭6,其係連接各軸部5與熱介質循環單元3;各軸部5係隔著軸承B1由支撐殼體7可旋轉地支撐。 The roller 2 is provided with: a roller body portion 4 formed of a metal material, the center line of the roller being aligned with the rotation axis C1 and the outer peripheral surface portion 4a extending in a cylindrical shape; and a pair of shaft portions 5, which are integrally Provided on each end surface portion 4b of the roller body portion 4, and the axis center line is consistent with the rotation axis C1; a pair of rotary joints 6, which are connected to each axis portion 5 and the heat medium circulation unit 3; each axis portion 5 is separated from The bearing B1 is rotatably supported by the support housing 7 .

熱介質流徑10係具備:主通路10a,其係形成於輥本體部4之內部;導入通路10b,其係在一軸部5的旋轉軸心C1上延伸成直線狀以及連通於主通路10a;第1排出通路10c,其係使另一軸部5的旋轉軸心C1上延伸成直線狀以及連通於主通路10a。 The heat medium flow path 10 includes: a main passage 10a formed inside the roller body portion 4; an introduction passage 10b extending linearly on the rotation axis C1 of the one shaft portion 5 and communicating with the main passage 10a; The first discharge passage 10c extends linearly on the rotation axis C1 of the other shaft portion 5 and communicates with the main passage 10a.

主通路10a係構成剖面圓形狀以及對應於外周面部4a之全部區域之方式,構成沿著旋轉軸心C1而延伸之形狀。 The main passage 10a has a circular cross-sectional shape and a shape extending along the rotation axis C1 so as to correspond to the entire area of the outer peripheral surface portion 4a.

導入通路10b係構成剖面圓形狀以及剖面積設定成比主通路10a更狹窄,並使從熱介質循環單元3所吐出之熱介質H1導入主通路10a。 The introduction passage 10b has a circular cross-sectional shape and a cross-sectional area set narrower than the main passage 10a, and introduces the heat medium H1 discharged from the heat medium circulation unit 3 into the main passage 10a.

第1排出通路10c係構成剖面圓形狀以及剖面積設定成比主通路10a更狹窄,以使主通路10a之熱介質H1排出至熱介質循環單元3。亦即,第1排出通路10c之剖面積係比沿著主通路10a之旋轉軸心C1而對應於外周面部4a之全部區域之方式延伸的部分之剖面積更狹窄。 The first discharge passage 10c has a circular cross-sectional shape and a cross-sectional area set narrower than the main passage 10a so that the heat medium H1 in the main passage 10a is discharged to the heat medium circulation unit 3 . That is, the cross-sectional area of the 1st discharge passage 10c is narrower than the cross-sectional area of the part extended so that it may correspond to the whole area|region of the outer peripheral surface part 4a along the rotation axis C1 of the main passage 10a.

熱介質循環單元3係使熱介質H1從輥2之一端側朝另一端側循環,而該熱介質H1係在輥2之內部依序通過導入通路10b、主通路10a及第1排出通路10c。 The heat medium circulation unit 3 circulates the heat medium H1 from one end side of the roll 2 to the other end side, and the heat medium H1 passes through the introduction passage 10b, the main passage 10a and the first discharge passage 10c in this order inside the roll 2.

在輥本體部4中之另一端面部4b的內部形成從正面看呈L字狀延伸之第2排出通路10d。第2排出通路10d係如圖2至圖4所示,一端為在輥本體部4之主通路10a的下游側,且連通於接近外周面部4a之位置的主通路10a,另一方面,另一端連通於第1排出通路10c之上流側,在旋轉軸心C1周圍等間隔地形成12處。 In the inside of the other end surface part 4b of the roller main body part 4, the 2nd discharge passage 10d extended in an L-shape when viewed from the front is formed. As shown in FIGS. 2 to 4 , the second discharge passage 10d has one end connected to the main passage 10a downstream of the main passage 10a of the roller body portion 4 and communicating with the position close to the outer peripheral surface portion 4a, and the other end. It communicates with the upstream side of the 1st discharge passage 10c, and is formed in 12 places at equal intervals around the rotation axis C1.

然後,詳述有關使輥裝置1運作時之輥2內部的熱介質H1之流動。 Next, the flow of the heat medium H1 inside the roll 2 when the roll device 1 is operated will be described in detail.

首先,使輥裝置1之熱介質循環單元3運作。如此一來,熱介質H1依序在輥2之導入通路10b、主通路10a及第1排出通路10c流動。 First, the heat medium circulation unit 3 of the roll device 1 is operated. In this way, the heat medium H1 flows through the introduction passage 10b of the roller 2, the main passage 10a, and the first discharge passage 10c in this order.

然後,使輥2朝旋轉軸心C1周圍之一側(圖3之箭號R1)旋轉,以及接觸於被連續輸送之貼合膜W1。此時,在輥2之內部,熱介質H1依序在導入通路10b、主通路10a及第1排出通路10c流動。接著,從第2排出通路10d排出主通路10a內之氣體,同時在輥本體部4內使熱介質H1流動。熱介質H1較佳係始終與輥本體部4之外周面部4a的整個背面接觸之方式進行循環。若熱介質H1始終與上述外周面部4a之整個背面接觸之方式進行循環,在輥本體部4之外周面部4a均一地冷卻,而可免於接觸輥2之貼合膜W1產生的溫度分布不均。 Then, the roller 2 is rotated toward one side (arrow R1 in FIG. 3 ) around the rotation axis C1, and is brought into contact with the continuously conveyed bonding film W1. At this time, inside the roller 2, the heat medium H1 flows through the introduction passage 10b, the main passage 10a, and the first discharge passage 10c in this order. Next, the gas in the main passage 10a is discharged from the second discharge passage 10d, and the heat medium H1 is made to flow in the roll body 4 at the same time. The heat medium H1 is preferably circulated so as to be in contact with the entire back surface of the outer peripheral surface portion 4a of the roller body portion 4 at all times. If the heat medium H1 is continuously circulated in contact with the entire back surface of the outer peripheral surface portion 4a, the outer peripheral surface portion 4a of the roller body portion 4 is uniformly cooled, and the temperature distribution unevenness caused by the bonding film W1 of the contact roller 2 can be avoided. .

又,因氣體不聚集於輥本體部4之上部,故可使外周面部4a冷卻至所希望之溫度為止之時間變短,可有效地冷卻貼合膜W1。 Moreover, since gas does not collect in the upper part of the roll main body part 4, the time until the outer peripheral surface part 4a is cooled to a desired temperature can be shortened, and the bonding film W1 can be cooled efficiently.

又,在旋轉軸心C1周圍等間隔地形成2處以上之第2排出通路10d,故在輥2之旋轉運作時,各第2排出通路10d成為以短間隔通過輥2之上部的氣池。因此,使輥2之每一旋轉之主通路10a的上部聚集之氣體之排出時間增加,可有效地在主通路10a無間隙地充滿熱介質H1。 Moreover, since two or more second discharge passages 10d are formed at equal intervals around the rotation axis C1, each second discharge passage 10d becomes an air pool passing through the upper part of the roller 2 at short intervals during the rotation operation of the roller 2. Therefore, the discharge time of the gas accumulated in the upper portion of the main passage 10a for each rotation of the roller 2 is increased, and the main passage 10a can be efficiently filled with the heat medium H1 without a gap.

又,各第2排出通路10d係形成於輥本體部4之端面部4b的內部,故相較於在輥本體部4之外側安裝具有第2排出通路10d之構造時,輥2之外形變小。因此,可使輥2整體緊密,並可有效地利用輥2周圍之空間。 In addition, since each second discharge passage 10d is formed inside the end surface portion 4b of the roller body 4, the external deformation of the roller 2 is smaller than when the structure having the second discharge passage 10d is attached to the outside of the roller body 4. . Therefore, the entire roll 2 can be made compact, and the space around the roll 2 can be effectively used.

(輥之其他構造) (Other structures of rollers)

圖5A係表示可應用於本揭示之製造方法或製造裝置的輥之其他實施型態的概略剖面圖。圖5B係圖5A之A-A剖面圖。該輥50係與屬於單管之圖2的輥2不同,為雙管之輥。以下,僅說明與前述輥2不同之部分。 FIG. 5A is a schematic cross-sectional view showing another embodiment of the roll that can be applied to the manufacturing method or the manufacturing apparatus of the present disclosure. FIG. 5B is a cross-sectional view taken along line A-A of FIG. 5A . This roll 50 is a double-pipe roll unlike the roll 2 of FIG. 2 which is a single pipe. Hereinafter, only the parts different from the aforementioned roller 2 will be described.

如圖5A與圖5B所示,輥50係具有外管51、內管52、第1軸部53及第2軸部54。內管52係配置於外管51之內部,外管51與內管52係構成輥本體部。第1軸部53係設於輥本體部之一端,第2軸部54係設於輥本體部之另一端。 As shown in FIGS. 5A and 5B , the roller 50 has an outer tube 51 , an inner tube 52 , a first shaft portion 53 and a second shaft portion 54 . The inner tube 52 is arranged inside the outer tube 51, and the outer tube 51 and the inner tube 52 constitute a roll body portion. The first shaft portion 53 is provided at one end of the roller body portion, and the second shaft portion 54 is provided at the other end of the roller body portion.

輥50係具有熱介質流動之熱介質流徑55。熱介質流徑55係具有:主通路,其係設於輥本體部(外管51及內管52);導入通路55d,其係設於第1軸部53;及,第1排出通路55e,其係設於第2軸部54。 The roller 50 has a heat medium flow path 55 through which the heat medium flows. The heat medium flow path 55 has a main passage provided in the roll body portion (the outer tube 51 and the inner tube 52), an introduction passage 55d provided in the first shaft portion 53, and a first discharge passage 55e, It is attached to the second shaft portion 54 .

主通路係從輥50之旋轉軸心C1方向觀看,由位於外管51與內管52之間的剖面環狀之第1通路55a、從旋轉軸心C1延伸成放射狀而連通於第1通路55a之一端側的複數之第2通路55b、從旋轉軸心C1延伸成放射狀而連通於第1通路55a之另一端側的複數之第3通路55c所構成。 The main passage is viewed from the direction of the rotation axis C1 of the roller 50, and is connected to the first passage by extending radially from the rotation axis C1 from the first passage 55a having an annular cross-section between the outer tube 51 and the inner tube 52. A plurality of second passages 55b on one end side of 55a and a plurality of third passages 55c extending radially from the rotation axis C1 and communicating with the other end side of the first passage 55a are constituted.

第1通路55a係以可對應於輥本體部之外周面部51a之全部區域之方式沿著旋轉軸心C1而延伸。第2通路55b及第3通路55c係分別等間隔地形成於旋轉軸心C1周圍。各第2通路55b係使導入通路55d與第1通路55a連通,各第3通路55c係使第1通路55a與第1排出通路55e連通。 The first passage 55a extends along the rotation axis C1 so as to correspond to the entire area of the outer peripheral surface portion 51a of the roller body portion. The second passage 55b and the third passage 55c are formed around the rotation axis C1 at equal intervals, respectively. Each second passage 55b communicates the introduction passage 55d with the first passage 55a, and each third passage 55c communicates the first passage 55a and the first discharge passage 55e.

第1排出通路55e係設定成剖面比第1通路55a更狹窄。亦即,第1排出通路55e之剖面積係比沿著主通路之旋轉軸心C1而對應於外周面部51a之全部區域之方式延伸的部分之剖面積更狹窄。 The first discharge passage 55e is set to be narrower in cross section than the first passage 55a. That is, the cross-sectional area of the 1st discharge passage 55e is narrower than the cross-sectional area of the part extended so that it may correspond to the whole area|region of the outer peripheral surface part 51a along the rotation axis C1 of the main passage.

接著,熱介質係如圖5A之虛線的箭號所示,從導入通路55d依序通過第2通路55b、第1通路55a及第3通路55c,而從第1排出通路55e排出。 Next, the heat medium is discharged from the first discharge passage 55e through the second passage 55b, the first passage 55a, and the third passage 55c in order from the introduction passage 55d, as indicated by the arrows of the dotted line in FIG. 5A.

第2軸部54之周圍係從旋轉軸心C1方向觀看,延伸成略放射狀之複數的第2排出通路55f等間隔地配設於旋轉軸心C1周圍。第2排出通路55f係包含配管。配管係例如,由橡膠材所構成的配管管體所構成,但亦可以金屬管或樹脂管所形成。 The periphery of the second shaft portion 54 is viewed from the direction of the rotational axis C1, and a plurality of second discharge passages 55f extending slightly radially are arranged around the rotational axis C1 at equal intervals. The second discharge passage 55f includes piping. The piping system is formed of, for example, a piping pipe body made of a rubber material, but may be formed of a metal pipe or a resin pipe.

第2排出通路55f之一端在主通路之下游側,且連通於接近外周面部51a之位置的主通路(第1通路55a),第2排出通路55f之另一端係連通於第1排出通路55e。 One end of the second discharge passage 55f is on the downstream side of the main passage, and communicates with the main passage (first passage 55a) at a position close to the outer peripheral surface portion 51a, and the other end of the second discharge passage 55f communicates with the first discharge passage 55e.

又,使主通路(第1通路55a)之上部的氣池排出之運作與圖2之輥2比較,除了所排出之路徑從第2排出通路10d改變成第2排出通路55f以外,其餘係相同,故省略詳細的說明。 Furthermore, the operation of discharging the air pool above the main passage (first passage 55a) is the same as that of the roller 2 of FIG. 2, except that the discharge route is changed from the second discharge passage 10d to the second discharge passage 55f , so the detailed description is omitted.

藉由以上,因在輥本體部或第2軸部54之外側配設有第2排出通路55f,故相較於輥本體部之端部的內部形成第2排出通路55f之構造,加工成本變低,且可設為抑制成本之輥50。 As described above, since the second discharge passage 55f is disposed on the outer side of the roller body portion or the second shaft portion 54, the processing cost is reduced compared to the structure in which the second discharge passage 55f is formed inside the end portion of the roller body portion. It is low, and can be set as the roll 50 which suppresses cost.

(實施例) (Example)

接著,對實施例進行說明。 Next, an Example is demonstrated.

(第1膜) (1st film)

藉由乾式延伸使厚度20μm之PVA膜(平均聚合度約2400、皂化度99.9莫耳%以上)單軸延伸成約6倍,再直接保持拉緊狀態,浸漬於40℃之純水中40秒鐘。 The PVA film with a thickness of 20 μm (average degree of polymerization of about 2400, degree of saponification of 99.9 mol% or more) was uniaxially stretched about 6 times by dry stretching, and then directly maintained in a tensioned state, immersed in 40 ℃ pure water for 40 seconds .

然後,藉由使該膜於碘/碘化鉀/水之質量比為0.044/5.7/100之28℃的染色水溶液中浸漬30秒鐘,進行染色處理。然後,藉由使染色處理後之膜於碘化鉀/硼酸/水之質量比為11.0/6.2/100之70℃的硼酸水溶液中浸漬120秒鐘,進行交聯處理。 Then, the dyeing treatment was performed by immersing the film in a dyeing aqueous solution having a mass ratio of iodine/potassium iodide/water at 28° C. of 0.044/5.7/100 for 30 seconds. Then, the crosslinking treatment was performed by immersing the dyed film in a boric acid aqueous solution having a mass ratio of potassium iodide/boric acid/water at 70°C of 11.0/6.2/100 for 120 seconds.

繼而,將交聯處理後之膜以8℃之純水洗淨15秒鐘之後,以300N/m之張力保持的狀態,在60℃下乾燥50秒鐘,然後,在75℃下乾燥20秒鐘。如此方式,獲得在PVA膜吸附定向碘之厚度7μm的偏光膜。 Next, the film after the crosslinking treatment was washed with pure water at 8°C for 15 seconds, then dried at 60°C for 50 seconds with a tension of 300 N/m, and then dried at 75°C for 20 seconds. bell. In this way, a polarizing film having a thickness of 7 μm in which directional iodine was adsorbed on the PVA film was obtained.

準備環烯烴系樹脂膜(COP、日本ZEON股份有限公司製ZF-14無UV吸收特性厚度13μm)作為保護膜。在所得到之偏光膜與環烯烴系樹脂膜之間注入水系接著劑,以夾輥貼合。將所得到之積層體的張力保持於430N/m,同時在60℃下乾燥2分鐘,獲得具備偏光片層、配置在偏光片層之單面的保護層之第1膜。第1膜之厚度為20μm。 As a protective film, a cycloolefin-based resin film (COP, ZF-14 made by ZEON Co., Ltd., with a thickness of 13 μm without UV absorption characteristics) was prepared. A water-based adhesive was injected between the obtained polarizing film and the cycloolefin-based resin film, and they were bonded together with a nip roll. The obtained laminate was dried at 60° C. for 2 minutes while maintaining the tension at 430 N/m to obtain a first film including a polarizer layer and a protective layer disposed on one side of the polarizer layer. The thickness of the first film was 20 μm.

又,水系接著劑係在水100質量份中添加羧基改質聚乙烯醇(KURARAY股份有限公司製;KURARAY POVAL(註冊商標)KL318)3質量份、水溶性聚醯胺環氧樹脂(田岡化學工業股份有限公司製;SUMIREZ RESIN(註冊商標)650;固形分濃度30%之水溶液)1.5質量份而調製。 In addition, the water-based adhesive was prepared by adding 3 parts by mass of carboxyl group-modified polyvinyl alcohol (manufactured by KURARAY Co., Ltd.; KURARAY POVAL (registered trademark) KL318), and a water-soluble polyamide epoxy resin (Taoka Chemical Industry Co., Ltd.) to 100 parts by mass of water. Co., Ltd.; SUMIREZ RESIN (registered trademark) 650; 30% solid content concentration aqueous solution) 1.5 parts by mass was prepared.

(第2膜) (2nd film)

準備以厚度38μm之聚對苯二甲酸乙二酯膜所形成之膜作為透明膜。在透明膜之單面使定向層用組成物塗佈成膜厚3μm,以累積光量成為20mJ/cm2之方式照射紫外線,形成定向層。 A film formed of a polyethylene terephthalate film having a thickness of 38 μm was prepared as a transparent film. The composition for an alignment layer was applied to one side of the transparent film to a thickness of 3 μm, and ultraviolet rays were irradiated so that the cumulative light intensity was 20 mJ/cm 2 to form an alignment layer.

又,上述定向層用組成物係以1:1:4:5之比例混合丙烯酸2-苯氧基乙酯、丙烯酸四氫呋喃甲酯、二新戊四醇三丙烯酸酯、及雙(2-乙烯基氧基乙基)醚,相對於所得到之混合物的總質量,以4%之比例添加作為聚合起始劑之LUCIRIN(註冊商標)TPO並調製。 In addition, the composition for the alignment layer is a mixture of 2-phenoxyethyl acrylate, tetrahydrofuran methyl acrylate, dipivalerythritol triacrylate, and bis(2-vinyl acrylate) at a ratio of 1:1:4:5 The oxyethyl) ether was prepared by adding LUCIRIN (registered trademark) TPO as a polymerization initiator at a ratio of 4% with respect to the total mass of the obtained mixture.

在所形成之定向層上,藉由模塗覆將含有聚合性向列型液晶化合物(MERCK公司製,RMM28B)之液晶組成物塗佈於定向層上。 On the formed alignment layer, a liquid crystal composition containing a polymerizable nematic liquid crystal compound (manufactured by MERCK, RMM28B) was coated on the alignment layer by die coating.

在液晶組成物之調製,係使用混合熱介質作為熱介質,該混合熱介質係以質量比(MEK:MIBK:CHN)35:30:35之比例混合甲乙酮(MEK)、甲基異丁基酮(MIBK)、及沸點為155℃之環己酮(CHN)而成者。接著,以乾燥前之塗佈量成為4至5g之方式將液晶組成物塗佈於定向層上,而該液晶組成物係調製成液晶組成物每100g之固形分為1至1.5g。 In the preparation of the liquid crystal composition, a mixed heat medium is used as the heat medium. The mixed heat medium is a mixture of methyl ethyl ketone (MEK) and methyl isobutyl ketone in a mass ratio (MEK:MIBK:CHN) 35:30:35. (MIBK) and cyclohexanone (CHN) with a boiling point of 155°C. Next, the liquid crystal composition is coated on the alignment layer so that the coating weight before drying is 4 to 5 g, and the liquid crystal composition is prepared so that the solid content of the liquid crystal composition is 1 to 1.5 g per 100 g of the liquid crystal composition.

將液晶組成物塗佈於定向層上之後,使乾燥溫度設為75℃、乾燥時間設為120秒鐘而乾燥處理所得到之塗佈層。然後,藉由紫外線(UV)照射使液晶化合物聚合並硬化。如此方式,獲得以相位差層、定向層及透明膜所構成之第2膜。該相位差層係滿足nz>nx=ny之關係,且為正C層。相位差層與定向層之合計的厚度為4μm。 After coating the liquid crystal composition on the alignment layer, the coating layer obtained by drying treatment was set to 75° C. for drying temperature and 120 seconds for drying time. Then, the liquid crystal compound is polymerized and hardened by ultraviolet (UV) irradiation. In this manner, the second film composed of the retardation layer, the alignment layer, and the transparent film was obtained. The retardation layer satisfies the relationship of nz>nx=ny, and is a positive C layer. The total thickness of the retardation layer and the alignment layer was 4 μm.

(能量線活性型之接著劑的製造方法) (Manufacturing method of energy ray active adhesive)

以下述表1所示的比例混合化合物作為接著劑。在表1係以質量份數表示化合物之比例。 Compounds were mixed at the ratio shown in Table 1 below as an adhesive. In Table 1, the proportions of the compounds are expressed in parts by mass.

[表1]

Figure 110115601-A0202-12-0022-1
[Table 1]
Figure 110115601-A0202-12-0022-1

表1中之化合物的詳細內容係如下列。 The details of the compounds in Table 1 are as follows.

化合物1: Compound 1:

Figure 110115601-A0202-12-0022-2
Figure 110115601-A0202-12-0022-2

3,4-環氧基環己烷羧酸3’,4’-環氧基環己基甲酯(DAICEL化學工業股份有限公司製「CEL2021P」、脂環式二環氧化物) 3,4-Epoxycyclohexanecarboxylic acid 3',4'-epoxycyclohexylmethyl ester ("CEL2021P" manufactured by DAICEL Chemical Industry Co., Ltd., alicyclic diepoxide)

化合物2: Compound 2:

Figure 110115601-A0202-12-0022-3
Figure 110115601-A0202-12-0022-3

新戊二醇二環氧丙基醚(NPGDGE)(NAGASE CHEMTEX股份有限公司製「EX-211」、二環氧化物) Neopentyl Glycol Diglycidyl Ether (NPGDGE) ("EX-211" manufactured by Nagase Chemtex Co., Ltd., Diepoxide)

化合物3: Compound 3:

Figure 110115601-A0202-12-0022-4
Figure 110115601-A0202-12-0022-4

2-乙基己基環氧丙基醚(EHGE)(東京化成工業股份有限公司製、單環氧化物) 2-Ethylhexylglycidyl ether (EHGE) (manufactured by Tokyo Chemical Industry Co., Ltd., monoepoxide)

起始劑:ADEKA股份有限公司製之陽離子系起始劑SP-500(固形分2.25份) Starter: cationic starter SP-500 manufactured by ADEKA Co., Ltd. (solid content 2.25 parts)

敏化劑:川崎化成工業股份有限公司製之敏化劑DEN Sensitizer: DEN, a sensitizer manufactured by Kawasaki Chemical Industry Co., Ltd.

調平劑:ADEKA股份有限公司製之調平劑KRM-430 Leveling agent: Leveling agent KRM-430 manufactured by ADEKA Co., Ltd.

(光學積層體之製造方法) (Manufacturing method of optical laminate)

使用圖1所示之製造裝置,依下述順序製作光學積層體。但,使用於該製造裝置之輥係設為如圖5A所示之輥50。若具體地敘述,輥係具有連結於主通路之第2排出通路。第2排出通路之配管的直徑為10mm。輥之最外徑為150mm,輥之長度為300mm。主通路之第1通路之外徑(外管之內徑)為128mm,主通路之第1通路之內徑(內管之外徑)為100mm。主通路之第1通路之剖面積為0.0050m2Using the manufacturing apparatus shown in FIG. 1, the optical laminated body was manufactured in the following procedure. However, the roll system used for this manufacturing apparatus is set to the roll 50 as shown to FIG. 5A. Specifically, the roller system has a second discharge passage connected to the main passage. The diameter of the piping of the second discharge passage was 10 mm. The outermost diameter of the roll was 150 mm, and the length of the roll was 300 mm. The outer diameter of the first passage of the main passage (inner diameter of the outer tube) is 128 mm, and the inner diameter of the first passage of the main passage (outer diameter of the inner tube) is 100 mm. The cross-sectional area of the first passage of the main passage was 0.0050 m 2 .

接著,一邊連續地輸送第1膜及第2膜,一邊對第1膜及第2膜之表面施予電暈處理。繼續輸送第1膜及第2膜,同時對第1膜之電暈處理面使用塗佈機(桿塗佈器)塗佈能量線活性型之接著劑後,重疊第1膜及第2膜,在一對貼合輥間通過,獲得具有第1膜/塗佈層/第2膜之層構成之貼合膜。 Next, corona treatment is given to the surface of a 1st film and a 2nd film, conveying a 1st film and a 2nd film continuously. Continue to convey the first film and the second film, and at the same time apply the energy ray active adhesive to the corona treated surface of the first film using a coater (bar coater), and then overlap the first film and the second film, It passed between a pair of bonding rolls, and obtained the bonding film which has the layer structure of a 1st film/coating layer/2nd film.

一邊以速度10m/分鐘輸送所得到之貼合膜,對於貼合膜以累積光量成為250mJ/cm2(UVB))之方式一邊密著於輥本體部,同時從活化處理裝置照射紫外線,使接著劑硬化,藉此,獲得光學積層體。活化處理裝置係使用EYEGRAPHICS公司製高壓水銀燈。 While conveying the obtained lamination film at a speed of 10 m/min, the lamination film was adhered to the roll body part so that the cumulative light amount was 250 mJ/cm 2 (UVB)), and ultraviolet rays were irradiated from the activation treatment device to make the adhesive film adhere to the roll body. The agent is cured, whereby an optical layered body is obtained. The activation treatment device used a high-pressure mercury lamp manufactured by EYEGRAPHICS.

2:輥 2: Roller

11:接著劑塗佈裝置 11: Adhesive coating device

13:活化處理裝置 13: Activation treatment device

15:光學積層體之製造裝置 15: Manufacturing equipment for optical laminates

16:貼合裝置 16: Fitting device

17:控制裝置 17: Controls

20:捲繞輥 20: Winding roller

21:第1貼合輥 21: The first bonding roller

22:第2貼合輥 22: The second bonding roller

31:第1膜(偏光膜) 31: The first film (polarizing film)

32:第2膜(透明膜) 32: Second film (transparent film)

33:貼合膜 33: Lamination film

34:光學積層體(偏光板) 34: Optical laminate (polarizing plate)

Claims (9)

一種光學積層體之製造方法,係至少具有1層由光學膜所構成的層之光學積層體的製造方法,其具備: A method for producing an optical laminate comprising at least one layer of an optical laminate comprising: 貼合步驟,係使互為不同之2片膜隔著能量線活性型之接著劑而貼合,並形成貼合膜; The step of laminating is to make two films different from each other stick together through the adhesive of the energy ray active type, and form a lamination film; 活化處理步驟,係一邊使前述貼合膜接觸輥,一邊在前述輥上對前述貼合膜照射能量線,而進行前述接著劑之活化處理; In the activation treatment step, the bonding film is irradiated with energy rays on the roller while the bonding film is brought into contact with the roller, and the activation treatment of the adhesive is performed; 在前述輥之內部係設有使熱介質流動之熱介質流徑,前述輥係具備輥本體部,藉由在前述熱介質流徑使前述熱介質循環之熱介質循環手段,調節前述輥之表面的溫度,其中,該輥本體部係輥中心線與旋轉軸心一致且外周面部延伸成圓筒狀; A heat medium flow path for flowing the heat medium is provided inside the roll, the roll is provided with a roll body portion, and the surface of the roll is adjusted by a heat medium circulation means for circulating the heat medium in the heat medium flow path. The temperature of the roller body part is consistent with the center line of the roller and the axis of rotation, and the outer peripheral surface extends into a cylindrical shape; 前述熱介質流徑係具備:主通路,係沿著前述旋轉軸心而以對應於前述輥本體部之外周面部的全部區域之方式延伸;導入通路,係在前述旋轉軸心上延伸且連通於前述主通路而在前述主通路導入前述熱介質;第1排出通路,係在前述旋轉軸心上延伸且連通於前述主通路而排出在該主通路流動之熱介質;第2排出通路,係一端在前述主通路之下游側,且連通於接近前述外周面部之位置的主通路,另一方面,另一端連通於前述第1排出通路; The heat medium flow path is provided with a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body portion, and an introduction passage extending on the rotation axis and communicating with the rotation axis. The main passage is used to introduce the heat medium into the main passage; the first discharge passage is extended on the rotation axis and communicated with the main passage to discharge the heat medium flowing in the main passage; the second discharge passage is one end On the downstream side of the main passage, and communicated with the main passage at a position close to the outer peripheral surface portion, on the other hand, the other end is communicated with the first discharge passage; 前述活化處理步驟係包含:一邊使前述輥本體部旋轉,一邊在前述熱介質流徑內使熱介質流動之操作。 The activation treatment step includes an operation of causing a heat medium to flow in the heat medium flow path while rotating the roll body. 一種光學積層體之製造方法,係至少具有1層由光學膜所構成的層之光學積層體的製造方法,其具備: A method for producing an optical laminate comprising at least one layer of an optical laminate comprising: 貼合步驟,係使互為不同之2片膜隔著能量線活性型之接著劑而貼合,並形成貼合膜; The step of laminating is to make two films different from each other stick together through the adhesive of the energy ray active type, and form a lamination film; 活化處理步驟,係一邊使前述貼合膜接觸輥,一邊在前述輥上對前述貼合膜照射能量線,而進行前述接著劑之活化處理; In the activation treatment step, the bonding film is irradiated with energy rays on the roller while the bonding film is brought into contact with the roller, and the activation treatment of the adhesive is performed; 在前述輥之內部係設有使熱介質流動之熱介質流徑,前述輥係具備輥本體部,藉由在前述熱介質流徑使前述熱介質循環之熱介質循環手段,調節前述輥之表面之溫度,其中,該輥本體部係輥中心線與旋轉軸心一致且外周面部延伸成圓筒狀; A heat medium flow path for flowing the heat medium is provided inside the roll, the roll is provided with a roll body portion, and the surface of the roll is adjusted by a heat medium circulation means for circulating the heat medium in the heat medium flow path. The temperature of the roller body part is that the center line of the roller is consistent with the rotation axis and the outer peripheral surface extends into a cylindrical shape; 前述熱介質流徑係具備:主通路,其係沿著前述旋轉軸心而以對應於前述輥本體部之外周面部的全部區域之方式延伸;排出通路,係排出在前述主通路流動之熱介質; The heat medium flow path is provided with: a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body; and a discharge passage for discharging the heat medium flowing in the main passage ; 前述活化處理步驟係包含:一邊使前述輥本體部旋轉,一邊使熱介質在前述熱介質流徑內流動之操作, The activation treatment step includes an operation of causing a heat medium to flow in the heat medium flow path while rotating the roller body, 在前述主通路內流動之熱介質的體積係維持在前述主通路之總容積的90%以上100%以下。 The volume of the heat medium flowing in the main passage is maintained at 90% or more and 100% or less of the total volume of the main passage. 如請求項1或2所述之光學積層體的製造方法,其中,前述活化處理步驟係在使前述輥本體部之表面的寬度方向之溫度分布維持在3.5℃以下之狀態進行。 The manufacturing method of the optical laminated body of Claim 1 or 2 whose said activation process is performed in the state which maintains the temperature distribution of the width direction of the surface of the said roll main body part at 3.5 degreeC or less. 如請求項1至3中任一項所述之光學積層體的製造方法,其更包含:對經過前述活化處理之貼合膜上照射能量線之步驟。 The method for producing an optical laminate according to any one of Claims 1 to 3, further comprising: a step of irradiating an energy ray on the adhesive film subjected to the activation treatment. 一種光學積層體之製造裝置,係至少具有1層由光學膜所構成的層之光學積層體之製造裝置,其具備: An apparatus for producing an optical laminate, comprising at least one apparatus for producing an optical laminate having a layer composed of an optical film, comprising: 貼合裝置,係使互為不同之2片膜隔著能量線活性型之接著劑而貼合,並形成貼合膜; The laminating device is for laminating two mutually different films through an energy ray-active adhesive to form a laminating film; 輥,係接觸於前述貼合膜; A roller is in contact with the aforementioned laminating film; 活化處理裝置,係在前述輥上對前述貼合膜照射能量線,而進行前述接著劑之活化處理; The activation treatment device is used to irradiate the bonding film with energy rays on the roller to perform activation treatment of the adhesive; 在前述輥之內部係設有使熱介質流動之熱介質流徑,前述輥係具備輥本體部,藉由在前述熱介質流徑使前述熱介質循環之熱介質循環手段,調節前述輥之表面之溫度,其中,該輥本體部係輥中心線與旋轉軸心一致且外周面部延伸成圓筒狀; A heat medium flow path for flowing the heat medium is provided inside the roll, the roll is provided with a roll body portion, and the surface of the roll is adjusted by a heat medium circulation means for circulating the heat medium in the heat medium flow path. The temperature of the roller body part is that the center line of the roller is consistent with the rotation axis and the outer peripheral surface extends into a cylindrical shape; 前述熱介質流徑係具備:主通路,係沿著前述旋轉軸心而以對應於前述輥本體部之外周面部的全部區域之方式延伸;導入通路,係在前述旋轉軸心上延伸且連通於前述主通路而在前述主通路導入前述熱介質;第1排出通路,係在前述旋轉軸心上延伸且連通於前述主通路而排出在該主通路流動之熱介質;第2排出通路,係一端在前述主通路之下游側,且連通於接近前述外周面部之位置的主通路,另一方面,另一端連通於前述第1排出通路。 The heat medium flow path is provided with a main passage extending along the rotation axis so as to correspond to the entire area of the outer peripheral surface of the roller body portion, and an introduction passage extending on the rotation axis and communicating with the rotation axis. The main passage is used to introduce the heat medium into the main passage; the first discharge passage is extended on the rotation axis and communicated with the main passage to discharge the heat medium flowing in the main passage; the second discharge passage is one end On the downstream side of the main passage, it communicates with the main passage at a position close to the outer peripheral surface portion, and the other end communicates with the first discharge passage. 如請求項5所述之光學積層體之製造裝置,其更具有控制裝置,該控制裝置係藉由前述活化處理裝置進行前述接著劑之活化處理時,控制於:使前述輥本體部之表面的寬度方向之溫度分布維持在3.5℃以下之狀態。 The manufacturing apparatus for an optical laminate according to claim 5, further comprising a control device for controlling the surface of the roller body to be activated when the adhesive is activated by the activation treatment device. The temperature distribution in the width direction is maintained at 3.5°C or lower. 如請求項5或6所述之光學積層體之製造裝置,其中,前述輥本體部係具有外管與內管, The apparatus for producing an optical laminate according to claim 5 or 6, wherein the roll body portion has an outer tube and an inner tube, 前述外管與前述內管之間之空間為構成前述熱介質流徑之一部分。 The space between the outer tube and the inner tube constitutes a part of the flow path of the heat medium. 如請求項5至7中任一項所述之光學積層體之製造裝置,其中,前述第2排出通路係設有2個以上。 The manufacturing apparatus of the optical laminated body of any one of Claims 5-7 in which the said 2nd discharge passage is provided in 2 or more. 如請求項8所述之光學積層體之製造裝置,其中,前述第2排出通路係等間隔地設置在前述旋轉軸心周邊。 The manufacturing apparatus of the optical laminated body of Claim 8 in which the said 2nd discharge passage is provided in the periphery of the said rotating shaft center at equal intervals.
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