JP2004250213A - Method for laminating roll film - Google Patents

Method for laminating roll film Download PDF

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JP2004250213A
JP2004250213A JP2003044460A JP2003044460A JP2004250213A JP 2004250213 A JP2004250213 A JP 2004250213A JP 2003044460 A JP2003044460 A JP 2003044460A JP 2003044460 A JP2003044460 A JP 2003044460A JP 2004250213 A JP2004250213 A JP 2004250213A
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film
roll
linear
polarization
separating
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Toshihiko Tominaga
俊彦 富永
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Sumitomo Chem Co Ltd
住友化学工業株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a method for laminating a roll film for surely laminating the roll film without generating any bubbles.
SOLUTION: A laminating machine 1 draws out a linear polarization separating sheet 12 and a linear polarization sheet 11 respectively from a linear polarization separating film original roll 2 and a linear polarization film original roll 3, and laminates them with laminating rollers 7 after respectively separating separators 16, 18. As laminated surfaces are the outside faces of the respective rolls, once they are brought into contact with each other at one portion, the other portion is in a regular curling state to be separated from the laminated surfaces and lamination can be surely carried out without generating the bubbles. For the linear polarization separating sheet 12, the linear polarization separating film original roll 2 is rolled so as to have a protective film 15 on the opposite side of the laminated surface inside.
COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、ロール状の原反で供給されるロールフィルムを他のフィルムなどに貼合せるためのロールフィルムの貼合せ方法に関する。 The present invention relates to a laminating method for roll film for is laminated roll film supplied in rolled raw sheet such as another film.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
従来から、液晶表示装置(LCD)などの表示装置には、偏光板など、種々の光学的特性を有するフィルム製品が使用されている。 Conventionally, the display device such as a liquid crystal display (LCD), etc. polarizing plate, a film product having various optical properties have been used. 透過型の液晶表示装置では、バックライトと液晶表示セルの偏光板との間に、直線偏光分離板を配置して、表示輝度の改善を図ることも行われている。 A transmission type liquid crystal display device, between the polarizing plate on the backlight and the liquid crystal display cell, arranged linearly polarized separated plate, has also been possible to improve the display brightness. 振動面が直線偏光分離板の透過軸方向に一致する直線偏光成分を透過させ、反射軸方向に近い振動面を有する直線偏光成分はいったん反射させることによって、表示輝度の向上が可能となる。 The linearly polarized light component vibrating plane coincides with the transmission axis of the linearly polarized light separating plate is transmitted, linearly polarized light component having a close vibration plane to the reflection axis direction by causing once reflected, thereby improving the display luminance. そのような直線偏光分離板は、反射型偏光フィルム、非吸収型偏光フィルムおよび輝度上昇フィルムなどとも呼ばれており、たとえば多層構造を有するものが知られている(たとえば、特許文献1参照)。 Such linearly polarized light separation plate, reflective polarizing film, such as a non-absorbing polarizing film and a brightness enhancement film and is also called, for example, those having a multilayer structure is known (e.g., see Patent Document 1). 多層構造を有する直線偏光分離板として、3M社からDBEF(Dual Brightness Enhancement Film )が販売されている。 As linearly polarized light separating plate having a multi-layer structure, DBEF (Dual Brightness Enhancement Film) is sold by 3M Corporation. 液晶表示装置で輝度向上を図るためには、日東電工(株)からPCF To achieve luminance enhancement in liquid crystal display devices, PCF from Nitto Denko Corporation
(Polarization Conversion Film)と呼ばれる輝度向上フィルムも販売されている。 Brightness enhancement film called (Polarization Conversion Film) has also been sold. エレクトロルミネッセンス(EL)表示装置などの自発光型表示装置でも、発光表示部の前面側に直線偏光偏光分離板を配置すれば、外部から入射する光の反射光を低減し、表示を見やすくすることができる(たとえば、特許文献2参照)。 In self-luminous display devices such as electroluminescence (EL) display device, by arranging the linearly polarized light polarized separated plate on the front side of the light emitting display, it reduces reflection of light incident from the outside and easy to see the display it is (for example, see Patent Document 2).
【0003】 [0003]
直線偏光分離板は、製造業者からロール状の原反の形態で、直線偏光分離フィルムとして供給される。 Linearly polarized separated plate is a rolled raw sheet form from the manufacturer, is supplied as a linearly polarized light separating film. 直線偏光分離フィルムは、ロールから直線的に引出して、所定の形状に切断して、偏光板などと貼り合わせ、さらに表示装置と組合わせる複数の工程を経て使用される。 Linearly polarized light separating film is linearly drawn out from the roll, and cut into a predetermined shape, laminated polarizing plate and the like are used through a plurality of steps of combining the further display device.
【0004】 [0004]
【特許文献1】 [Patent Document 1]
特表平−506837号公報【特許文献2】 JP Kohyo -506837 [Patent Document 2]
特開2001−67022号公報【0005】 Japanese Unexamined Patent Publication No. 2001-67022 Publication [0005]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
前述のような直線偏光分離板などのフィルム製品の貼合せでは、気泡やしわ、あるいは全体的な反りなどが生じないように均一に接合することが重要である。 The lamination of the film product, such as a linearly polarized light separating plate as described above, it is important that the air bubbles or wrinkles, or the like overall warping uniformly bonded so as not to cause.
貼合せた接合部に気泡やしわなどが生じると、透過する光が散乱され、光学的な性能が低下してしまう。 When bubbles or wrinkles in the joints laminated occurs, the transmitted light is scattered, the optical performance is deteriorated. 大きな反りが生じると、光学部品として平坦な状態で使用することができなくなってしまう。 When a large warp occurs, it becomes impossible to use in a flat state as an optical component.
【0006】 [0006]
直線偏光分離板などの貼合せは、粘着剤などが塗布されている状態で行われるので、たとえば複数箇所が同時に接触すると、接触点間のフィルム製品がたるみ、気泡やしわが生じてしまう。 Lamination, such as linearly polarized separated plate, so is performed in a state where such an adhesive is applied, for example, when a plurality of locations simultaneously contacts, slack film products between the contact points, air bubbles or wrinkles occur. 粘着剤による接合強度は大きいので、いったん不適正な接合が行われてしまうと、適正な状態に貼り戻すことは困難である。 Since the bonding strength by pressure-sensitive adhesive is large, because once been improper bonding performed, it is difficult to return bonded to a proper state. 直線偏光分離板などは高価な材料であり、歩留りの低下は製造コストの上昇を招いてしまう。 Etc. linearly polarized separated plate is an expensive material, the decrease in yield resulting in an increase in manufacturing cost.
【0007】 [0007]
本発明の目的は、ロールフィルムを気泡などが生じないように確実に貼合せることが可能なロールフィルムの貼合せ方法を提供することである。 An object of the present invention is to provide a laminating method of the roll film capable of is laminated roll film securely so that no bubbles.
【0008】 [0008]
【課題を解決するための手段】 In order to solve the problems]
本発明は、ロール状の原反で供給されるロールフィルムの貼合せを、 The present invention is a laminating roll film supplied in rolled raw sheet,
貼合面側が外側となるようにロール状の原反を巻いておくことを特徴とするロールフィルムの貼合せ方法である。 Lamination surface side is the pasting method roll film, characterized in that previously wrap a roll of raw so that outside.
【0009】 [0009]
本発明に従えば、ロール状の原反で供給されるロールフィルムは、巻癖で元のロールの内面側にカールしやすい。 According to the invention, roll film supplied in rolled raw sheet is easily curled on the inner surface side of the original roll at the winding habit. 貼合面側がロールの外側となるように原反を巻いておくので、貼合時には貼合面に対して外側に反り、一箇所のみで接触する状態となりやすい。 Since previously wrap a raw as lamination surface side is the outside of the roll, warp outwardly relative lamination surface at the time of lamination tends to be a state of contact with only one place. 接触している部分から接合を進めていけば、気泡などが混入しない状態で、健全な貼合を行うことができる。 If we proceed with joining the parts in contact, with the air bubbles are not mixed, it is possible to perform sound bonding.
【0010】 [0010]
また本発明は、前記ロールフィルムを、他のフィルムと貼合せすることを特徴とする。 The present invention, the roll film, characterized by laminating with other films.
【0011】 [0011]
本発明に従えば、ロールフィルムを他のフィルムと貼合して、複数の機能を有するフィルム製品を製造するための貼合工程で、接合部に気泡などが入らず、良好な貼合を行うことができる。 According to the present invention, the roll film pasted with other films, in bonding step for producing a film product having a plurality of functions, such as air bubbles do not enter the joint, perform good bonding be able to.
【0012】 [0012]
また本発明は、前記ロールフィルムが直線偏光分離フィルムであり、 The present invention, the roll film is a linearly polarized light separating film,
前記他のフィルムが直線偏光フィルムであり、 The other film is a linear polarizing film,
該直線偏光分離フィルムは、直線偏光フィルムとの貼合後の形態で表示装置の一部を構成する光学フィルムとして使用され、該表示装置の製造後に最終的に剥離して除去する保護フィルムを有し、 Linearly polarized light separating film is used as an optical film constituting a part of a display device in the form of post-laminating the linearly polarizing film, have a protective film is removed by finally peeling after manufacture of the display device and,
前記ロール状の原反では、該保護フィルム側が内側となるように巻いておくことを特徴とする。 The roll-shaped raw is characterized in that the protective film side previously wrap so that the inside.
【0013】 [0013]
本発明に従えば、ロール状の原反で供給される直線偏光分離フィルムに直線偏光フィルムを貼合し、表示装置の一部を構成する光学的フィルムとして使用される。 According to the present invention, it is used as an optical film stuck linearly polarizing film to linearly polarized light separating film supplied in rolled raw sheet, constitutes a part of a display device. 直線偏光分離フィルムには、製造工程で損傷などを受けないように保護フィルムが、直線偏光フィルムとの貼合面に対向する外表面側に接合されている。 The linearly polarized light separating film, a protective film so as not undergo such damage in the manufacturing process is bonded to the outer surface side opposite to the bonding surface of the linear polarization film. この保護フィルム側をロール状原反の内側となるように巻いておけば、貼合面はロールの外側となり、適正な反りを持たせた状態で貼合を行うことができる。 If by winding the protective film side so as to be inside of the rolled raw sheet, the lamination surface becomes outside of the roll, it is possible to perform bonding in a state in which no correct warpage.
【0014】 [0014]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
図1は、本発明の実施の一形態であるロールフィルムの貼合せ方法を実行する貼合機の概略的な構成を(a)で示し、貼合せを行う貼合シートの断面構成を(b)で示す。 Figure 1 is a schematic configuration of a laminating machine for performing a laminating process of a roll film according to an embodiment of the present invention shown in (a), the cross-sectional configuration of the laminated sheet to perform lamination (b shown in). 貼合機1は、直線偏光分離フィルム原反ロール2と直線偏光フィルム原反ロール3とをそれぞれ装着し、フィルムを引出して貼合せを行うことができる。 Laminating machine 1, a linearly polarized light separating film bulk roll 2 and the linear polarizing film master roll 3 and respectively attached, can be performed lamination pulling the film. 直線偏光分離フィルム原反ロール2から引出される直線偏光分離フィルムは、傷が付かないように、セパレータが巻かれているので、セパレータ巻取機構4でセパレータを巻取って分離した直線偏光分離シートを、カット装置で所定の長さに切断する。 Linearly polarized light separating film drawn from a linearly polarized light separating film bulk roll 2, as being scratched since the separator is wound, linearly polarized light separating and separated by winding a separator with a separator take-up mechanism 4 sheets and cut into a predetermined length by a cutting device. 切断された直線偏光分離シートには、セパレータ巻取機構6でセパレータを分離するように、直線偏光フィルム原反ロール3から直線偏光シートを引出し、貼合ロール7で重ねて貼合せる。 To cut linearly polarized light separating sheet, to separate the separator with a separator take-up mechanism 6, pull the linearly polarizing sheet from linearly polarizing film master roll 3, it is laminated on top by lamination rolls 7. 所定の長さの貼合が行われると、カット機構8で切断し、貼合シート10が得られる。 When laminating the predetermined length is carried out, cut with cutting mechanism 8, laminated sheet 10 is obtained.
【0015】 [0015]
貼合シート10は、図1(b)に示すように、直線偏光シート11と直線偏光分離シート12とを貼合して形成される。 Laminated sheet 10, as shown in FIG. 1 (b), is formed by pasting a linear polarizer sheet 11 and linear polarization separation sheet 12. 直線偏光シート11は、両表面に粘着剤層13,14をそれぞれ有し、一方の粘着剤層13で直線偏光分離シート12と貼合せる。 Linearly polarizing sheet 11 has a pressure-sensitive adhesive layers 13 and 14 on both surfaces, it is laminated a linearly polarized light separating sheet 12 on one of the pressure-sensitive adhesive layer 13. 直線偏光分離シート12の貼合面と対向する面側には、保護フィルム15が接合されている。 The lamination surface opposite to the surface side of the linearly polarized light separating sheet 12, the protective film 15 is bonded. 貼合面側にはセパレータ16が接合されている。 Separator 16 is bonded to the bonding surface side. 保護フィルム15の表面には、セパレータ17が接合されている。 The surface of the protective film 15, the separator 17 is joined. 直線偏光シート11の粘着剤層13,14の表面側には、セパレータ18,19がそれぞれ接合されている。 On the surface side of the adhesive layers 13 and 14 of linearly polarized light sheet 11, separator 18 and 19 are joined, respectively.
【0016】 [0016]
図1(a)に示す貼合機1では、貼合に先行して、セパレータ巻取機構4,6で貼合面側のセパレータ16,18を巻取って除去している。 In laminating machine 1 shown in FIG. 1 (a), prior to bonding, it is removed by winding the separator 16, 18 of the lamination surface side separator winding mechanism 4,6. これによって、直線偏光分離シート12の表面と粘着剤層13の表面とが露出し、貼合が可能な状態となる。 Thus, the exposed surface of the linearly polarized light separating sheet 12 and the surface of the adhesive layer 13 becomes the state capable lamination is. 直線偏光分離シート12で粘着剤層13を介する直線偏光シート11との貼合が行われない側の表面には、保護フィルム15が付着している状態で、直線偏光分離シート12の表面を保護している。 On the surface on the side where bonding is not performed between the linear polarizer sheet 11 via an adhesive layer 13 with a linear polarization separation sheet 12, in a state where the protective film 15 is attached, it protects the surface of the linearly polarized light separating sheet 12 are doing. 保護フィルム15の表面にもセパレータ17が接合されているけれども、このセパレータ17は、貼合シート10として出荷するまでに剥離する。 Although the separator 17 to the surface of the protective film 15 is bonded, the separator 17 is peeled off before shipment as laminated sheet 10. 直線偏光分離シート11で貼合面と対向する表面側の粘着剤層14は、貼合シート10として液晶表示セルなどに貼付ける際に使用するので、セパレータ19を付けておく。 Adhesive layer 14 of the lamination surface at a linearly polarized light separating sheet 11 facing the surface side, because it uses when pasted like a liquid crystal display cell as laminated sheet 10 in advance with a separator 19.
【0017】 [0017]
図2は、図1(a)の直線偏光分離フィルム原反ロール2の形態で供給される直線偏光分離フィルム20の断面構成を示す。 Figure 2 shows a cross-sectional configuration of the linearly polarized light separating film 20 that is supplied in the form of linearly polarized light separating film bulk roll 2 in FIG. 1 (a). DBEFなどの直線偏光分離シート12は、全体で100〜200μmの厚さを有し、直線偏光分離層21の両側をスキン保護層22,23で挟むようにして形成される。 Linearly polarized light separating sheet 12, such as DBEF may have a total thickness of at 100-200 [mu] m, is formed so as to sandwich both sides of the linearly polarized light separation layer 21 with the skin protective layer 22, 23. 直線偏光分離層21は、前述の特許文献1に記載されているように、たとえばポリエチレンナフタレート(PEN)の薄膜による光学層と、ポリエチレンナフタレートのコポリマーの薄膜による光学層とを交互に、数100層を積層して形成される。 Linearly polarized light separation layer 21, as described in Patent Document 1 described above, alternate example and the optical layer by a thin film of polyethylene naphthalate (PEN), and an optical layer according to a thin film of a copolymer of polyethylene naphthalate, the number It is formed by laminating 100 layers. スキン保護層22,23は、ポリエチレンナフタレートを材料とする。 Skin protective layer 22 and 23, the polyethylene naphthalate and materials. 一方のスキン保護層23の外表面には、厚さ数10μm程度のポリエチレンテレフタレート(PET)を材料とする保護フィルム15が装着される。 On one outer surface of the skin protective layer 23, a protective film 15 for about several 10μm thick polyethylene terephthalate (PET) and the material it is mounted. スキン保護層23と保護フィルム15との接合は、粘着剤(図示していない)によって行われる。 Bonding between the skin protective layer 23 and the protective film 15 is performed by a pressure-sensitive adhesive (not shown).
【0018】 [0018]
他方のスキン保護層22および保護フィルム15の外表面には、ポリエチレン(PE)を材料とするセパレータ16,17がそれぞれ装着される。 On the outer surface of the other of the skin protective layer 22 and the protective film 15, a separator 16, 17 and polyethylene (PE) material is mounted, respectively. セパレータ16,17の接合も、親和力によって行われる。 Bonding the separator 16, 17 is also performed by affinity. セパレータ16,17は、保護フィルム15よりも厚く、数10μmの厚さを有する。 The separator 16, 17 is thicker than the protective film 15 has a thickness of several 10 [mu] m. セパレータ16,17は、前述のように、貼合シート10として出荷するまでに剥離される。 The separator 16 and 17, as described above, is stripped before shipment as laminated sheet 10. 保護フィルム15側ではないセパレータ16の表面には、通常、マーキングなどがされているので、保護フィルム15が存在しない側であることが判る。 The surface of the protective film 15 is not a side separator 16, typically, since such markings are, it is understood that the protective film 15 is the side that does not exist.
【0019】 [0019]
直線偏光分離フィルム20は、光学的異方性として、透過軸方向と反射軸方向とを有する。 Linearly polarized light separating film 20 as an optical anisotropy, having the transmission axis direction and the reflection axis. 光が入射すると、透過軸方向に振動する光は透過し、反射軸方向に振動する光は反射される。 When light is incident, light vibrating in the transmission axis direction is transmitted, light vibrating in reflection axis direction is reflected. 図1(b)に示す貼合シート10では、直線偏光シート11の透過軸方向と直線偏光分離シート12の透過軸方向とを合わせる。 In laminated sheet 10 shown in FIG. 1 (b), combining a transmission axis direction of the transmission axis direction and the linearly polarized light separating sheet 12 of the linear polarizer sheet 11.
【0020】 [0020]
図3は、図1(a)の直線偏光フィルム原反ロール3の形態で供給される直線偏光フィルム30の断面構成を示す。 Figure 3 shows a cross-sectional structure of the linear polarizing film 30 to be supplied in the form of a linear polarizing film master roll 3 in Fig. 1 (a). 直線偏光シート11は、偏光層31を保護層32,33で挟んで形成される。 Linearly polarizing sheet 11 is formed across the polarizing layer 31 with a protective layer 32, 33. 偏光層31は、たとえば数10μmの厚みを有し、保護層32,33は偏光層31よりも厚い。 Polarizing layer 31 has a thickness of, for example, several 10 [mu] m, the protective layer 32, 33 is thicker than the polarizing layer 31. 偏光層31は、ポリビニルアルコール(PVA)などのフィルムを加熱しながら延伸し、ヨウ素(I)などの溶液に接触させて、ヨウ素分子などを延伸方向に並べて偏光機能を付加する。 Polarizing layer 31 is stretched while heating the film such as polyvinyl alcohol (PVA), by contacting a solution, such as iodine (I), adding a polarizing function by arranging and iodine molecules in the stretch direction. このような偏光層31によって、延伸方向に振動する光が吸収され、延伸方向と垂直な方向に振動する光が透過する。 Such polarizing layer 31, light vibrating in the stretching direction is absorbed, light vibrating in the stretching direction and the direction perpendicular to transmission. 保護層32,33は、たとえばトリアセチルセルロース(TAC)を材料として、偏光層31の両側に接着剤(図示していない)で接合される。 Protective layers 32 and 33, for example triacetyl cellulose (TAC) as the material is bonded to both sides of the polarizing layer 31 with an adhesive (not shown). 保護層32,33の外表面には、数10μmの厚さで、たとえばアクリル系の粘着剤層13,14が設けられ、粘着剤層13,14の外表面には、たとえばポリエチレンテレフタレートを材料とするセパレータ18,19がそれぞれ数10μmの厚さで設けられる。 The outer surface of the protective layer 32 and 33, a thickness of several 10 [mu] m, for example pressure-sensitive adhesive layer 13 of acrylic is provided on the outer surface of the pressure-sensitive adhesive layers 13 and 14, for example a material of polyethylene terephthalate separators 18 and 19 are provided with a thickness of a few 10μm respectively.
【0021】 [0021]
図1(a)の貼合ロール7で貼合を行う際には、セパレータ18が自動的に剥離され、粘着剤層13が直線偏光分離フィルム20からセパレータ16を剥離したスキン保護層22の表面に付着して、貼合が行われる。 When performing bonding with the lamination rolls 7 of FIGS. 1 (a) is a separator 18 is peeled off automatically, the surface of the skin protective layer 22 to the adhesive layer 13 is peeled off the separator 16 from the linearly polarized light separating film 20 attached to, bonding is performed.
【0022】 [0022]
図4は、図2の直線偏光分離フィルム20と図3の直線偏光フィルム30とを貼り合わせて製造される貼合製品40の断面構成を示す。 Figure 4 shows a cross-sectional structure of lamination product 40 to be manufactured by bonding the linear polarizing film 30 of the linearly polarized light separating film 20 and 3 in Figure 2. 直線偏光分離フィルム20の直線偏光分離層21は、光学的異方性として透過軸方向の振動面を有する光を通しやすく、反射軸方向の振動面を有する光を反射しやすい性質を有する。 Linearly polarized light separation layer 21 of the linearly polarized light separating film 20 has a easily passes light having a plane of vibration of the transmission axis direction, it is easy to reflect light having a plane of vibration of the reflection axis direction properties as optical anisotropy.
直線偏光フィルム30の偏光層31は、光学的異方性として透過軸方向の振動面を有する光を通しやすく、吸収軸方向の振動面を有する光を吸収しやすい性質を有する。 Polarizing layer 31 of the linear polarizing film 30 has a easily passes light having a plane of vibration of the transmission axis direction, it is easy to absorb light having a plane of vibration in the absorption axis direction properties as optical anisotropy. 貼合製品40では、直線偏光分離層21の透過軸の方向と偏光層31の透過軸の方向とが一致するように貼り合わせられる。 In lamination product 40, it is bonded to the direction of the transmission axis direction and the polarizing layer 31 of the transmission axis of the linearly polarized light separation layer 21 matches.
【0023】 [0023]
貼合製品40は、中間製品として、液晶表示装置の製造業者に向けて出荷される。 Lamination products 40, as an intermediate product, is shipped to the manufacturer of the liquid crystal display device. 液晶表示装置の製造業者は、セパレータ19を剥がし、粘着剤層14で液晶表示セルのガラス基板などに貼り付ける。 Manufacturers of liquid crystal display device, peeling the separator 19 is attached, such as a glass substrate of a liquid crystal display cell with an adhesive layer 14. 最終的には、保護フィルム15も剥がされる。 Finally, the protective film 15 is also peeled.
【0024】 [0024]
図5は、図1(a)の貼合機1で直線偏光分離フィルム原反ロール2から引出す直線偏光分離フィルム20と、直線偏光フィルム原反ロール3から引出す直線偏光フィルム30とを貼合させる際の方向の関係を示す。 Figure 5 is a linearly polarized light separating film 20 drawn out by laminating machine 1 from linearly polarized light separating film bulk roll 2 in FIG. 1 (a), thereby stuck a linearly polarizing film 30 drawn out from the linear polarizing film master roll 3 It indicates the direction of the relationship at the time. 直線偏光分離フィルム20は、長手方向が透過軸方向20aとなり、幅方向が反射軸方向20bとなる。 Linearly polarized light separating film 20 in the longitudinal direction next to the transmission axis direction 20a, the width direction becomes a reflection axis 20b. 直線偏光フィルム30は、幅方向が透過軸方向30aとなり、長手方向が吸収軸方向30bとなる。 Linear polarizing film 30, the width direction next to the transmission axis direction 30a, the longitudinal direction becomes the absorption axis direction 30b. 両方の透過軸方向20a,30aを合わせるように貼合するので、直線偏光分離フィルム原反ロール2の軸線方向と、直線偏光フィルム原反ロール3の軸線方向とは直交させる。 Since bonding to match both the transmission axis 20a, a 30a, the axial line direction of the linearly polarized light separating film bulk roll 2, is perpendicular to the axial direction of the linear polarizing film master roll 3.
【0025】 [0025]
図6は、(a)で、図5に示すようなロールフィルム同士、あるいは少なくとも一方がロールフィルムであるときに、ロールの巻癖によって貼合面に生じる反りとしてのカールの状態を示す。 Figure 6 is a (a), when a roll film or between at least one of roll film, such as shown in FIG. 5, showing the state of curl of a warp occurring in the bonding surface by the curling tendency of the roll. 貼合する表面からの反りをカール値Hで表すと、端部が中央に対して貼合表面から離れる方向に反る正カールと、端部が中央よりも貼合表面に近づく逆カールとの状態が生じうる。 Denoting the warp from sticking to the surface with curl value H, a positive curl end is warped in a direction away from the bonding surface with respect to the center, a reverse curl edge portion approaches the bonding surface than the center of the state can occur. (b)に示すように、逆カールと正カールとを試料を作成して貼合させ、結果を比較してみると、逆カールでは気泡が混入するのに対し、正カールでは気泡混入なく良好な貼合が行われることが判る。 (B), the reverse curl positive curl was stuck to prepare a sample, Comparing the results, while the air bubbles are mixed in the reverse curling, good without bubbly is a positive curl it can be seen that the bonding, such is performed. 図1(a)の貼合機1で正カールの状態で直線偏光分離シート12の貼合を行うためには、(c)に示すように、貼合面とは反対側の保護シート15を直線偏光分離フィルム原反ロール2を巻く際に、内側となるように巻いておけばよい。 To perform lamination of the linearly polarized light separating sheet 12 is a positive curl state laminating machine 1 in FIG. 1 (a), the (c), the protective sheet 15 opposite to the lamination surface when winding the linearly polarized light separating film bulk roll 2, it is sufficient to wound such that the inside. また、図3に示す直線偏光フィルム30は、厚み方向の構成は対称であるけれども、図1のように貼合を行う際には、正カールの状態となるように、ロールの外側が貼合面となるようにしておく。 Also, the linear polarizing film 30 shown in FIG. 3, although the thickness direction configuration is symmetrical, when performing bonding as in Figure 1, so that the positive state of curl, the outer roll lamination keep in such a way that surface.
【0026】 [0026]
すなわち、本実施形態では、ロール状の原反で供給されるロールフィルムの貼合せを、貼合面側が外側となるようにロール状の原反を巻いておいて行う。 That is, in this embodiment, a laminating roll film supplied in rolled raw sheet, lamination surface side is sowed rolled raw sheet so that the outer. ロール状の原反で供給されるロールフィルムは、巻癖で元のロールの内面側にカールしやすい。 Roll film supplied in rolled raw sheet is easily curled on the inner surface side of the original roll at the winding habit. 貼合面側がロールの外側となるように原反を巻いておくので、貼合時には貼合面に対して外側に反り、図6(a)に示す正カールとなって、一箇所のみで接触する状態となりやすい。 Since previously wrap a raw as lamination surface side is the outside of the roll, warp outwardly relative lamination surface at the time of bonding, and a positive curl shown in FIG. 6 (a), contacting only one place It tends to state that. 接触している部分から接合を進めていけば、気泡などが混入しない状態で、健全な貼合を行うことができる。 If we proceed with joining the parts in contact, with the air bubbles are not mixed, it is possible to perform sound bonding.
【0027】 [0027]
特に、直線偏光分離フィルム20は、製造が困難で、比較的高価であり、直線偏光フィルム30との貼合の歩留りを向上させる必要がある。 In particular, the linearly polarized light separating film 20 is difficult to manufacture, relatively expensive, it is necessary to improve the yield of the bonding between the linear polarizing film 30. 保護フィルム15側を内側となるように巻いておくだけで、正カールの状態での良好な貼合を行うことができる。 Only previously wrap so that the protective film 15 side and the inner side, it is possible to perform good bonding with the positive state of curl.
【0028】 [0028]
【発明の効果】 【Effect of the invention】
以上のように本発明によれば、ロールフィルムの貼合面側がロールの外側となるように原反を巻いておくので、貼合時には貼合面に対して外側に反り、一箇所のみで接触する状態となりやすく、気泡などが混入しない状態で、健全な貼合を行うことができる。 According to the present invention as described above, since the lamination surface side of the roll film is previously wrap a raw so that the outside of the roll, warp outwardly relative lamination surface at the time of bonding, contact only one place It tends to be state that, in a state in which the air bubbles are not mixed, it is possible to carry out a healthy bonding.
【0029】 [0029]
また本発明によれば、ロールフィルムを他のフィルムと貼合する際に、接合部に気泡などが入らず、良好な貼合を行うことができる。 According to the present invention, when laminated with the roll film of the other films, such air bubbles do not enter the joint, it is possible to perform good bonding.
【0030】 [0030]
また本発明によれば、ロール状の原反で供給される直線偏光分離フィルムに直線偏光フィルムを貼合せる際に、直線偏光分離フィルムが損傷などを受けないように保護する保護フィルムが、直線偏光フィルムとの貼合面に対向する外表面側に接合されているので、保護フィルム側をロール状原反の内側となるように巻いておけば、巻癖を有効に利用して、適正な反りを持たせた状態で貼合を行うことができる。 According to the present invention, when is laminated a linearly polarizing film to linearly polarized light separating film supplied in rolled raw sheet, the protective film to protect the linearly polarized light separating film is not subjected to such damage, linearly polarized light since they are joined to the outer surface side opposite to the bonding surface of the film, protecting the film side if wound so that the inside of the rolled raw sheet, by effectively utilizing the core set curl, proper warpage it is possible to perform the bonding in a state in which no.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の実施の一形態であるロールフィルムの貼合せ方法を実行する貼合機の概略的な構成を示す簡略化した側面図、および貼合せを行う貼合シートの断面図である。 [1] simplified side view showing a schematic configuration of a laminating machine for performing a combined method lamination roll film according to one embodiment of the present invention, and laminating a sectional view of a laminated sheet to perform is there.
【図2】図1の直線偏光分離フィルム原反ロール2の形態で供給される直線偏光分離フィルム20の断面図である。 2 is a cross-sectional view of a linearly polarized light separating film 20 that is supplied in the form of linearly polarized light separating film bulk roll 2 in FIG. 1.
【図3】図1の直線偏光フィルム原反ロール3の形態で供給される直線偏光フィルム30の断面図である。 3 is a cross-sectional view of the linear polarizing film 30 to be supplied in the form of a linear polarizing film master roll 3 in Fig.
【図4】図2の直線偏光分離フィルム20と図3の直線偏光フィルム30とを貼り合わせて製造される貼合製品40の断面図である。 It is a cross-sectional view of FIG. 4 linearly polarized light separation 2 film 20 and the linear polarizing film 30 and the laminated product 40 to be manufactured by bonding a of FIG.
【図5】図1の貼合機1で直線偏光分離フィルム原反ロール2から引出す直線偏光分離フィルム20と、直線偏光フィルム原反ロール3から引出す直線偏光フィルム30とを貼合させる際の方向の関係を示す簡略化した斜視図である。 [5] a linearly polarized light separating film 20 by laminating machine 1 of Figure 1 drawn from a linearly polarized light separating film bulk roll 2, the direction of the time of stuck a linearly polarizing film 30 drawn out from the linear polarizing film master roll 3 is a simplified perspective view showing the relationship.
【図6】図1の貼合機1で貼合を行う際の直線偏光分離シート12のカールの状態を示す断面図、カールの方向による貼合状態の試験結果を示す図表、および正カールを得るための直線偏光分離フィルム原反ロール2の形態を示す斜視図である。 6 is a sectional view showing the curling state of the linearly polarized light separating sheet 12 when performing the bonding with bonding machine 1 of Figure 1, Figure shows the test results of bonding state by the direction of the curl, and a positive curl is a perspective view showing an embodiment linearly polarized light separating film bulk roll 2 to obtain.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 貼合機2 直線偏光分離フィルム原反ロール3 直線偏光フィルム原反ロール4,6 セパレータ巻取機構7 貼合ロール10 貼合シート11 直線偏光シート12 直線偏光分離シート13,14 粘着剤層15 保護フィルム16,17,18,19 セパレータ20 直線偏光分離フィルム21 直線偏光分離層30 直線偏光フィルム31 偏光層 First bonding machine 2 linearly polarized light separating film master roll 3 linearly polarizing film bulk roll 4,6 separator winding mechanism 7 lamination rolls 10 laminated sheet 11 linear polarizer sheet 12 linearly polarized light separating sheet 13 and 14 pressure-sensitive adhesive layer 15 protective film 16, 17, 18, 19 separator 20 linearly polarized light separating film 21 linearly polarized light separation layer 30 linearly polarizing film 31 polarizing layer

Claims (3)

  1. ロール状の原反で供給されるロールフィルムの貼合せを、 The laminating roll film supplied in rolled raw sheet,
    貼合面側が外側となるようにロール状の原反を巻いておくことを特徴とするロールフィルムの貼合せ方法。 Pasting method roll film lamination surface side, characterized in that the previously wrap a roll of raw so that outside.
  2. 前記ロールフィルムを、他のフィルムと貼合せすることを特徴とする請求項1記載のロールフィルムの貼合せ方法。 It said roll film, pasting method roll film according to claim 1, characterized in that lamination with other films.
  3. 前記ロールフィルムが直線偏光分離フィルムであり、 The roll film is a linearly polarized light separating film,
    前記他のフィルムが直線偏光フィルムであり、 The other film is a linear polarizing film,
    該直線偏光分離フィルムは、直線偏光フィルムとの貼合後の形態で表示装置の一部を構成する光学フィルムとして使用され、該表示装置の製造後に最終的に剥離して除去する保護フィルムを有し、 Linearly polarized light separating film is used as an optical film constituting a part of a display device in the form of post-laminating the linearly polarizing film, have a protective film is removed by finally peeling after manufacture of the display device and,
    前記ロール状の原反では、該保護フィルム側が内側となるように巻いておくことを特徴とする請求項2記載のロールフィルムの貼合せ方法。 Wherein in the rolled raw sheet, pasting method roll film according to claim 2, characterized in that the protective film side previously wrap so that the inside.
JP2003044460A 2003-02-21 2003-02-21 Method for laminating roll film Pending JP2004250213A (en)

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