TW200808880A - Optical film, its use, and method for manufacturing optical film - Google Patents

Optical film, its use, and method for manufacturing optical film Download PDF

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TW200808880A
TW200808880A TW096112324A TW96112324A TW200808880A TW 200808880 A TW200808880 A TW 200808880A TW 096112324 A TW096112324 A TW 096112324A TW 96112324 A TW96112324 A TW 96112324A TW 200808880 A TW200808880 A TW 200808880A
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film
thickness
optical film
resin
cyclic olefin
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TW096112324A
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Chinese (zh)
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Masayuki Sekiguchi
Takuhiro Ushino
Tomohiro Mitsuboshi
Kei Tanaka
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Jsr Corp
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L45/00—Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2045/00—Use of polymers of unsaturated cyclic compounds having no unsaturated aliphatic groups in a side-chain, e.g. coumarone-indene resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2345/00—Characterised by the use of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Materials Engineering (AREA)
  • Polarising Elements (AREA)

Abstract

To provide an optical film which is less in periodical thickness unevenness when manufacturing a long-length film industrially and is made of a cyclic olefin resin, and to provide a method for manufacturing the optical film. The optical film is made of the cyclic olefin resin, has thickness variations periodic in the longitudinal direction and satisfies all conditions shown by expression (A): (P-V) ≤ 1, expression (B): W ≥ 3 and expression (C): D ≤ 30 (wherein P is the maximum value (μm) of the thickness in the thickness variations; V is the minimum value (μm) of the thickness in the thickness variations; W is a periodic interval (cm) in the longitudinal direction; and D is the absolute value of the maximum value of slopes (ppm) of the thickness variations).

Description

200808880 (1) 九、發明說明 【發明所屬之技術領域】 本發明係關於一種厚度變動少的光學薄膜。具體地關 於由環狀烯烴系樹脂所構成、厚度變動少且具有適合作爲 相位差薄膜的功能之光學薄膜及使用該光學薄膜之偏光 板。 【先前技術】 環狀烯烴樹脂因其透明性、耐熱性、耐濕性等佳，適 合用於光學薄膜的用途。通常，由環狀烯烴樹脂所構成之 薄膜，係藉由溶液流鑄法（溶液鑄造法）、溶融擠出法等 製膜，依據需要進行延伸等而製造。 光學薄膜被要求透明性等的光學特性優異，同時薄膜 必須爲均勻且光學波紋少。作爲防止或抑制製造光學薄膜 時產生光學波紋之製造光學薄膜的方法，例如已有提案藉 由使用抑制模頭唇部的缺陷形狀之特定T型模頭，以熔融 擠出成形製造光學薄膜時，抑制沿薄膜的擠出方向上連續 地發生的凹凸狀線狀樣子的產生之方法（專利文獻1)。 但是，於工業上製造長薄膜的情況下，由於供給原料 樹脂所使用的泵的特性、捲取薄膜的滾輪之旋轉習慣等， 產生長度方向上週期性的厚度變動，由此所得的光學薄 膜，產生明顯的週期變化、光學上的彎曲（所謂十字記 號）的問題。 〔專利文獻1〕日本公開專利特開2005- 1 48568號公 (2) 200808880 報 【發明內容】 〔發明所欲解決之課題〕 本發明係以提供製造工業上長薄膜時之少有週期性厚 度的不均勻之環狀烯烴所構成的光學薄膜’以及由環狀烯 烴所構成的減少週期性厚度不均勻之光學薄膜的製造方法 爲課題。 〔解決課題之手段〕 本發明的光學薄膜，係由環狀烯烴系樹脂所構成，在 長度方向上有週期性的厚度變動之薄膜，其特徵爲滿足下 述式（A ) 、（ B )以及（C )所示的全部條件， P - V < 1 ... ( A ) • W>3 ... ( B ) D<30 ... ( C ) (式（A)中，p表示厚度變動中厚度的極大値（μηι) ’ V表示厚度變動中厚度的極小値（μηι); 式（Β )中，W爲長度方向上極大厚度2點間的間 隔，在該2點的ρ値比存在於該2點間之V的最小値大 0· 1 ( μηι )以上的情況下被測定作爲最短的間隔，表示長 度方向的週期間隔（cm ); -6- 200808880 ⑶ 式（C)中，D表示薄膜厚度變化的斜率（ppm )之最 大値的絕對値）。 如此本發明的光學薄膜，該環狀烯烴系樹脂係由下述 式（1)所表示的至少1種化合物聚合或共聚合而得之樹 脂較理想。200808880 (1) Description of the Invention [Technical Field of the Invention] The present invention relates to an optical film having a small variation in thickness. Specifically, it is an optical film which is composed of a cyclic olefin resin and has a small thickness variation and has a function as a retardation film, and a polarizing plate using the optical film. [Prior Art] The cyclic olefin resin is suitable for use in an optical film because of its excellent transparency, heat resistance, moisture resistance and the like. In general, a film made of a cyclic olefin resin is produced by a solution casting method (solution casting method), a melt extrusion method, or the like, and is produced by stretching or the like as necessary. The optical film is required to have excellent optical properties such as transparency, and the film must be uniform and have less optical ripple. As a method of preventing or suppressing the production of an optical film by generating optical corrugations when manufacturing an optical film, for example, it has been proposed to produce an optical film by melt extrusion molding by using a specific T-die which suppresses the defect shape of the lip of the die. A method of suppressing generation of a concavo-convex linear appearance which continuously occurs in the extrusion direction of the film (Patent Document 1). However, when a long film is industrially produced, the optical film obtained by periodically varying the thickness in the longitudinal direction due to the characteristics of the pump used for supplying the raw material resin, the spinning habit of the roller for winding the film, and the like, A problem of significant periodic variation, optical bending (so-called cross mark). [Patent Document 1] Japanese Laid-Open Patent Publication No. 2005- 1 48568 (2) 200808880 SUMMARY OF INVENTION [Problem to be Solved by the Invention] The present invention provides a small periodic thickness when manufacturing an industrial long film. A method for producing an optical film comprising a non-uniform cyclic olefin and a method for producing an optical film comprising a cyclic olefin which reduces uneven periodic thickness is a problem. [Means for Solving the Problem] The optical film of the present invention is a film composed of a cyclic olefin resin and having a periodic thickness variation in the longitudinal direction, and is characterized by satisfying the following formulas (A) and (B) and (C) All the conditions shown, P - V < 1 ... ( A ) • W > 3 ... ( B ) D < 30 ... ( C ) (In the formula (A), p represents the thickness The maximum thickness of the varying thickness μ(μηι) 'V represents the minimum thickness 値(μηι) in the thickness variation; in the formula (Β), W is the interval between the two points in the length direction, and the ratio of ρ値 at the two points When the minimum value of V is greater than 0·1 (μηι) or more between the two points, it is measured as the shortest interval, and indicates the period interval (cm) in the longitudinal direction; -6- 200808880 (3) In the formula (C), D represents the absolute 値 of the maximum 値 of the slope (ppm) of the change in film thickness. In the optical film of the present invention, the cyclic olefin resin is preferably a resin obtained by polymerizing or copolymerizing at least one compound represented by the following formula (1).

(1) (式（1 )中，R1〜R4爲氫原子、鹵原子、碳數1〜30之 烴基或其他的1價有機基，可分別爲相同或相異；且R1〜 R4中任意2個可互相鍵結而形成單環或多環構造；m爲0 或正的整數，P爲〇或正的整數）。 本發明的光學薄膜，較理想爲具有相位差薄膜的功 能。 本發明的光學薄膜，較理想爲長度方向的長度爲5 0m 以上的長薄膜。 本發明偏光板，較理想爲至少一面上具有上述具有作 爲相位差薄膜功能之本發明的光學薄膜。 本發明的液晶顯示器，其特徵爲具有上述任一種本發 明的光學薄膜或上述本發明的偏光板。 200808880 (4) 本發明之光學薄膜的製造方法，其係製造上述本發明 的光學薄膜的方法，其特徵爲具有將環狀烯烴系樹脂使用 齒輪泵供給擠出機，在擠出機出口之極大壓力與平均壓力 的差爲平均壓力的0.2%以下的條件下，藉由熔融擠出法 使其成形爲薄膜狀的步驟。 本發明之光學薄膜的製造方法，其係製造上述本發明 的光學薄膜的方法，其特徵爲將環狀烯烴系樹脂成形爲薄 Φ 膜狀以滾輪捲取時，正常運轉時滾輪的捲取速度的極大値 或極小値，與平均捲取速度的差之絕對値爲平均捲取速度 的〇. 1 %以下。如此的光學薄膜的製造方法，使用表面爲 陶瓷製、表面粗糙度Rs的極大値Rmax ( μπι )滿足Rmax <0 ·2的範圍內之捲取滾輪較理想。 〔發明的效果〕 根據本發明，可提供由環狀烯烴系樹脂所構成，在長 # 度方向上週期性厚度變動少、薄膜外觀良好、相位差及光 軸安定之無光學波紋的薄膜及其製造方法。而且，光學薄 . 膜爲延伸過的薄膜的情況下，適合使用作爲相位差、光軸 、安定、無光學波紋之相位差薄膜。關於本發明之光學薄 膜，因其厚度變動極少、光學波紋少，使用其之大畫面液 晶顯示器等，可達成全面無彎曲、不均勻之高性能。 【實施方式】 以下，具體地說明本發明。 -8- (5) 200808880 環狀烯烴系樹脂 關於本發明之光學薄膜，係由環狀烯烴系樹脂所構 成。作爲環狀烯烴系樹脂，係具有冰片烯骨架之環狀烯烴 系化合物以單獨或2種以上，或與環狀烯烴系化合物以外 之共聚合單體，使用作爲聚合或共聚合單體，也可使用加 成（共）聚合、開環（共）聚合或開環（共）聚合後添加 氫於主鏈中的雙鍵所得的環狀烯烴系樹脂中的任一種。 作爲構成關於本發明的光學薄膜之環狀烯烴系樹脂， 使用由下述一般式（1)所表示的單體（以下亦稱爲「特 定單體」）所得的聚合物或共聚合物（以下表示爲 「（共）聚合物」）較理想。更理想爲具有下述一般式 (1 ’）所表示的構造單元之（共）聚合物，特別理想爲具 有下述一般式（2)所表示的構造單元之（共）聚合物。(1) In the formula (1), R1 to R4 are a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 30 carbon atoms or another monovalent organic group, which may be the same or different, and any of R1 to R4. The ones may be bonded to each other to form a single-ring or multi-ring structure; m is 0 or a positive integer, and P is a 〇 or a positive integer). The optical film of the present invention is preferably a function having a retardation film. The optical film of the present invention is preferably a long film having a length in the longitudinal direction of 50 m or more. The polarizing plate of the present invention preferably has the above-described optical film of the present invention having a function as a retardation film on at least one side. The liquid crystal display of the present invention is characterized by comprising the optical film of any of the above-described inventions or the above-described polarizing plate of the present invention. 200808880 (4) A method for producing an optical film according to the present invention, which is characterized in that the method for producing the optical film of the present invention is characterized in that the cyclic olefin resin is supplied to an extruder using a gear pump, and the outlet of the extruder is extremely large. The step of forming the film into a film shape by a melt extrusion method under the condition that the difference between the pressure and the average pressure is 0.2% or less of the average pressure. A method for producing an optical film of the present invention, which is a method for producing the optical film of the present invention, which is characterized in that when a cyclic olefin resin is formed into a thin Φ film shape and wound by a roller, the winding speed of the roller during normal operation is obtained. The maximum or minimum 値, the absolute difference between the average winding speed and the average take-up speed is less than 1%. In such a method for producing an optical film, it is preferable to use a winding roller having a surface of a ceramic surface and a maximum roughness maxRmax (μπι ) of the surface roughness Rs satisfying a range of Rmax < 0·2. [Effects of the Invention] According to the present invention, it is possible to provide a film which is composed of a cyclic olefin resin and which has a small thickness variation in the longitudinal direction, a good film appearance, a phase difference, and an optical axis stability without optical corrugation. Production method. Further, in the case where the film is an extended film, a phase difference film which is a phase difference, an optical axis, a stable, and an optical corrugation is suitably used. In the optical film of the present invention, since the thickness variation is small and the optical ripple is small, a large-screen liquid crystal display or the like can be used, and high-performance without bending or unevenness can be achieved. [Embodiment] Hereinafter, the present invention will be specifically described. -8- (5) 200808880 Cyclic olefin resin The optical film of the present invention is composed of a cyclic olefin resin. The cyclic olefin-based resin may be used alone or in combination of two or more kinds of cyclic olefin-based compounds having a norbornene skeleton, or a copolymerizable monomer other than the cyclic olefin-based compound, and may be used as a polymerization or copolymerization monomer. Any one of cyclic olefin-based resins obtained by addition (co)polymerization, ring-opening (co)polymerization, or ring-opening (co)polymerization, and then adding a double bond of hydrogen to the main chain. The cyclic olefin-based resin constituting the optical film of the present invention is a polymer or a copolymer obtained by using a monomer represented by the following general formula (1) (hereinafter also referred to as "specific monomer") (hereinafter It is preferably expressed as "(co)polymer"). More preferably, it is a (co)polymer having a structural unit represented by the following general formula (1'), and particularly preferably a (co)polymer having a structural unit represented by the following general formula (2).

(式（1)中，R1〜R4爲氫原子、鹵原子、碳數1〜3〇的 烴基或其他1價的有機基，可分別爲相同或相異；而且Ri 〜R4中任意2個可互相鍵結而形成單環或多環構造；m爲 -9- 200808880 ⑹ 0或正的整數，P爲0或正的整數）。 [化3](In the formula (1), R1 to R4 are a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or another monovalent organic group, which may be the same or different, and any two of Ri to R4 may be used. Bonding to each other to form a monocyclic or polycyclic structure; m is -9-200808880 (6) 0 or a positive integer, P is 0 or a positive integer). [Chemical 3]

(1，) (式（1’）中，R1〜R4、p、m的定義與上述式（1)相 同）。(1,) (In the formula (1'), R1 to R4, p, and m are the same as defined in the above formula (1).

(式（2)中，R1〜R4的定義與上述式（1)相同）。 具體地，可適合使用下述（a )〜（6)所表示之聚合 物或共聚合物。 -10- (7) 200808880 (a )特定單體的開環聚合物（以下亦稱爲「特定_ 環聚合物」） (b)特定單體以及可與其共聚合之環狀單體 單體除外。以下亦稱爲「共聚合性環狀單體」）的開環共 聚合物（以下亦稱爲「特定開環共聚合物」） (c )特定單體以及含有不飽和雙鍵之化合物的飽禾口 共聚合物（以下亦稱爲「特定飽和共聚合物」） • ( d )特定開環聚合物或特定開環共聚合物（以下這 些亦稱爲「特定開環（共）聚合物」）的氫化（共）聚合 物 (e )將特定開環（共）聚合物藉由夫里得-夸夫特反 應（Friedel-Craft reaction )環化後氫化所得之氫化 (共）聚合物 [特定單體] • 作爲較理想的特定單體，例如上述式（1 )中，R1及 R3爲氫原子或碳數1〜1 〇的烴基，R2及R4爲氫原子或1 . 價有機基，R2及R4中至少一者表示氫原子以及烴基以外 . 的極性基，m爲0〜3的整數，p爲〇〜3的整數，m + p的 値爲0〜4，更理想爲〇〜2，特別理想爲1者。 而且，特定單體中，具有R2及R4爲下述式（3 )所 表示的具極性基之特定單體，從可得玻璃轉化溫度（以下 亦稱爲「Tg」）高、吸濕性低之環狀烯烴系熱塑性樹脂的 點，較適合。 -11 - (8) 200808880 -(CH2)nCOOR5 (3) (式中，R5表示碳數 1〜12的烴基，η爲 〇〜5的整 數）。 上述式（3 )中，R5爲烷基較理想。 而且，因η的値越小，所得的環狀烯烴系熱塑性樹脂 ^ 的Tg越高，較理想，特別是η爲〇之特定單體，因其容 易合成，故較理想。 而且，上述式（1)中，R1及R3爲烷基較理想，更理 想爲碳數1〜4的烷基，更加理想爲碳數1〜2的烷基，特 別理想爲甲基。更進一步，該烷基與上述式（3 )所表示 的極性基所鍵結之碳原子，鍵結於相同碳原子較理想。 而且，上述式（1)中m爲1之特定單體，從可得Tg 更高的熱塑性樹脂組成物的點，較理想。 # 作爲上述式（1 )所表示之特定單體的具體例，例如 雙環[2.2.1]庚-2-烯、 三環[5·2·1·02,6]·8-癸烯、 四環[4·4·0.12,5.Γ，1()]-3-十二烯、 五環[6.5.1.13,6.02,7.09，13]-4-十五烯、 五環[7.4.0_12,5.19，12.08，13]-3-十五烯、 三環[4·4·0.12,5]-3-十一烯、 ' 5-甲基雙環[2.2.1]庚-2-烯、 5-乙基雙環[2.2.1]庚-2-烯、 -12 - 200808880 (9) 5-甲氧基羰基雙環[2·2·1]庚-2-烯、 5_甲基-5-甲氧基羰基雙環[2.2.1]庚-2·烯、 5- 氰基雙環[2·2·1]庚-2-烯、 8-甲氧基羰基四環[4·4.0·12’5·17，1()]-3-十二烯、 8-乙氧基羰基四環[4.4.0. I2’5.1 7，1G]-3-十二烯、 • 8-正丙氧基羰基四環[4·4·0·12’5·17，1()]-3-十二烯、 8-異丙氧基羰基四環[4.4.0. I2’5」7，1 G]-3-十二烯、 φ 8-正丁氧基羰基四環[4.4.0.12,5.17，1()]-3-十二烯、 8 -甲基-8 -甲氧基羰基四環[4.4.0. l2,5. r，1G]-3 -十二 烯、 8 -甲基-8-乙氧基羰基四環[4.4.0.12,5.17，1()]-3-十二 烯、 ， 8-甲基-8-正丙氧基羰基四環[4.4.0.12,5.17，1()]-3-十二 烯、 8-甲基-8-異丙氧基羰基四環[4.4.0.12,5.17，1()]-3-十二 ⑩ 烯、 8-甲基-8-正丁氧基羰基四環[4·4·0·12,5·17，1(ϊ]-3-十二 • 烯、 _ 二甲醇八氫萘、 乙基四環十二烯、 6- 亞乙基-2-四環十二烯、 三甲醇八氫萘、 五環[δ·*』.；!2,5.；!9，12』8，13]-3-十六烯、 -13- 200808880 (10) 七環[8.8.0.14,7,1^，18.113，16.03,8.012，17]-5-二十一烯、 5-亞乙基雙環[2.2.1]庚-2-烯、 8-亞乙基四環[4.4.0.12,5.17，1()]-3-十二烯、 5-苯基雙環[2.2.1]庚-2-烯、 8-苯基四環[4.4.0.12,5.l7’1G]-3-十二烯、 5_氟雙環[2·2·1]庚-2-烯、 5-氟甲基雙環[2·2·1]庚-2-烯、 _ 5-三氟甲基雙環[2·2·1]庚-2-烯、 5-五氟乙基雙環[2·2·1]庚-2-烯、 5.5- 二氟雙環[2.2.1]庚-2-烯、 5.6- 二氟雙環[2.2.1]庚-2-烯、 5.5- 雙（三氟甲基）雙環[2.2.1]庚-2-烯、 5，6-雙（三氟甲基）雙環[2.2.1]庚-2-烯、 5·甲基-5-三氟甲基雙環[2·2·1]庚-2-烯、 5.5.6- 三氟雙環[2.2.1]庚-2-烯、 # 5,5,6-三（氟甲基）雙環[2·2·1]庚-2-烯、 5.5.6.6- 四氟雙環[2.2.1]庚-2-烯、 . 5,5,6,6-四（三氟甲基）雙環[2.2.1]庚-2-烯、 5.5- 二氟-6,6-雙（三氟甲基）雙環[2.2.1]庚-2-烯、 5，6-二氟-5，6·雙（三氟甲基）雙環[2.2.1]庚-2-烯、 5.5.6- 三氟-5-三氟甲基雙環[2.2.1]庚-2-烯、 5-氟-5-五氟乙基-6,6-雙（三氟甲基）雙環[2·2·1]庚 2 燒、 5，6-二氟-5-七氟異丙基-6-三氟甲基雙環[2.2.1]庚-2 -14- 200808880 (11) 烯、 5-氯-5,5,6-三氟雙環[2.2·1]庚-2-烯、 5，6-二氯-5，6-雙（三氟甲基）雙環[2.2.1]庚-2-烯、 5.5.6- 三氟-6-三氟甲氧基雙環[2·2·1]庚-2·烯、 5.5.6- 三氟-6-七氟丙氧基雙環[2.2.1]庚-2-烯、 8-氟四環[4.4.0.12’5.17’1()]-3-十二烯、8-氟甲基四環 [4·4_0·12ί5·17，1()]-3-十二烯、(In the formula (2), the definitions of R1 to R4 are the same as those in the above formula (1)). Specifically, a polymer or a copolymer represented by the following (a) to (6) can be suitably used. -10- (7) 200808880 (a) a ring-opening polymer of a specific monomer (hereinafter also referred to as "specific-ring polymer") (b) a specific monomer and a cyclic monomer monomer copolymerizable therewith . The ring-opening copolymer (hereinafter also referred to as "specific ring-opening copolymer"), which is also referred to as "copolymerizable cyclic monomer") (c) the saturation of a specific monomer and a compound containing an unsaturated double bond And co-polymers (hereinafter also referred to as "specific saturated copolymers") • (d) specific ring-opening polymers or specific ring-opening copolymers (hereinafter also referred to as "specific open-loop (co)polymers" Hydrogenated (co)polymer (e) a hydrogenated (co)polymer obtained by hydrogenation of a specific ring-opening (co)polymer by Friedel-Craft reaction [specific] 1. As a preferred specific monomer, for example, in the above formula (1), R1 and R3 are a hydrogen atom or a hydrocarbon group having 1 to 1 carbon atoms, and R2 and R4 are a hydrogen atom or a valence organic group, R2 and At least one of R4 represents a hydrogen atom and a polar group other than a hydrocarbon group, m is an integer of 0 to 3, p is an integer of 〇~3, and 値 of m + p is 0 to 4, more preferably 〇~2, particularly The ideal is one. Further, among the specific monomers, R2 and R4 are specific monomers having a polar group represented by the following formula (3), and have high glass transition temperature (hereinafter also referred to as "Tg") and low hygroscopicity. The point of the cyclic olefin-based thermoplastic resin is suitable. -11 - (8) 200808880 -(CH2)nCOOR5 (3) (wherein R5 represents a hydrocarbon group having 1 to 12 carbon atoms, and η is an integer of 〇~5). In the above formula (3), R5 is preferably an alkyl group. Further, the smaller the enthalpy of η, the higher the Tg of the obtained cyclic olefin-based thermoplastic resin ^ is preferable, and in particular, η is a specific monomer of ruthenium, and it is preferable because it is easily synthesized. Further, in the above formula (1), R1 and R3 are preferably an alkyl group, more preferably an alkyl group having 1 to 4 carbon atoms, more preferably an alkyl group having 1 to 2 carbon atoms, and particularly preferably a methyl group. Further, the carbon atom to which the alkyl group is bonded to the polar group represented by the above formula (3) is preferably bonded to the same carbon atom. Further, in the above formula (1), a specific monomer having m of 1 is preferable from the viewpoint of obtaining a thermoplastic resin composition having a higher Tg. # Specific examples of the specific monomer represented by the above formula (1), for example, bicyclo[2.2.1]hept-2-ene, tricyclo[5·2·1·02,6]·8-nonene, four Ring [4·4·0.12,5.Γ,1()]-3-dodecene, pentacyclic [6.5.1.13,6.02,7.09,13]-4-pentadecene, pentacyclic [7.4.0_12, 5.19,12.08,13]-3-pentadecenyl, tricyclo[4·4·0.12,5]-3-undecene, '5-methylbicyclo[2.2.1]hept-2-ene, 5- Ethylbicyclo[2.2.1]hept-2-ene, -12 - 200808880 (9) 5-methoxycarbonylbicyclo[2·2·1]hept-2-ene, 5-methyl-5-methoxy Carbonylbicyclo[2.2.1]heptan-2-ene, 5-cyanobicyclo[2·2·1]hept-2-ene, 8-methoxycarbonyltetracyclo[4·4.0·12'5·17 ,1()]-3-dodecene, 8-ethoxycarbonyltetracyclo[4.4.0. I2'5.1 7,1G]-3-dodecene, • 8-n-propoxycarbonyltetracyclo [ 4·4·0·12'5·17,1()]-3-dodecene, 8-isopropoxycarbonyltetracyclo[4.4.0. I2'5"7,1 G]-3-ten Diene, φ 8-n-butoxycarbonyltetracyclo[4.4.0.12, 5.17,1()]-3-dodecene, 8-methyl-8-methoxycarbonyltetracyclo[4.4.0. l2 , 5.r,1G]-3-dodecene, 8-methyl-8-ethoxycarbonyltetracyclo[4.4.0.12,5.17,1()]-3-ten Diene, 8-methyl-8-n-propoxycarbonyltetracyclo[4.4.0.12, 5.17,1()]-3-dodecene, 8-methyl-8-isopropoxycarbonyltetracyclic [4.4.0.12, 5.17, 1()]-3-1210-ene, 8-methyl-8-n-butoxycarbonyltetracyclo[4·4·0·12,5·17,1(ϊ] -3-12• ene, _ dimethanol octahydronaphthalene, ethyl tetracyclododecene, 6-ethylidene-2-tetracyclododecene, trimethyl octahydronaphthalene, pentacyclo[δ·* .;!2,5.;!9,12』8,13]-3-hexadecene, -13- 200808880 (10) Seven rings [8.8.0.14,7,1^,18.113,16.03,8.012,17 ]-5-Eicosene, 5-ethylenebicyclo[2.2.1]hept-2-ene, 8-ethylenetetracyclo[4.4.0.12,5.17,1()]-3-dodecene , 5-phenylbicyclo[2.2.1]hept-2-ene, 8-phenyltetracyclo[4.4.0.12,5.l7'1G]-3-dodecene, 5-fluorobicyclo[2·2· 1]hept-2-ene, 5-fluoromethylbicyclo[2·2·1]hept-2-ene, _ 5-trifluoromethylbicyclo[2·2·1]hept-2-ene, 5- Pentafluoroethylbicyclo[2·2·1]hept-2-ene, 5.5-difluorobicyclo[2.2.1]hept-2-ene, 5.6-difluorobicyclo[2.2.1]hept-2-ene, 5.5-bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5,6-bis(trifluoromethyl)bicyclo[2.2.1] 2-ene, 5-methyl-5-trifluoromethylbicyclo[2·2·1]hept-2-ene, 5.5.6-trifluorobicyclo[2.2.1]hept-2-ene, #5 ,5,6-tris(fluoromethyl)bicyclo[2·2·1]hept-2-ene, 5.5.6.6-tetrafluorobicyclo[2.2.1]hept-2-ene, . 5,5,6, 6-tetrakis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.5-difluoro-6,6-bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5 ,6-difluoro-5,6.bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.5.6-trifluoro-5-trifluoromethylbicyclo[2.2.1]heptane- 2-ene, 5-fluoro-5-pentafluoroethyl-6,6-bis(trifluoromethyl)bicyclo[2·2·1]heptane 2,5,6-difluoro-5-heptafluoroiso Propyl-6-trifluoromethylbicyclo[2.2.1]heptane-2-14-200808880 (11) ene, 5-chloro-5,5,6-trifluorobicyclo[2.2.1]hept-2-ene , 5,6-Dichloro-5,6-bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.5.6-trifluoro-6-trifluoromethoxybicyclo[2·2 ·1] hept-2-ene, 5.5.6-trifluoro-6-heptafluoropropoxybicyclo[2.2.1]hept-2-ene, 8-fluorotetracyclo[4.4.0.12'5.17'1() ]-3-dodecene, 8-fluoromethyltetracyclo[4·4_0·12ί5·17,1()]-3-dodecene,

8-二氟甲基四環[4.4.0· 1 2’5.17，1G]-3-十二烯、 8-三氟甲基四環[HO.；!2,5·；!7，10]」-十二烯、 8-五氟乙基四環[4.4.0.1 L5·：!7’1 ϋ]-3-十二烯、 8.8- 二氟四環[4.4.0.12,5.17，1()]-3-十二烯、 859-二氟四環[4.4.0.12,5.17’1()]-3-十二烯、 8.8- 雙（三氟甲基）四環[4.4.0.12,5.17，1()]-3-十二烯、 8.9- 雙（三氟甲基）四環[4·4_0· I2,5. 17，1()]·3-十二烯、 8-甲基-8-三氟甲基四環[4.4.0.12,5.17，1()]-3-十二烯、 8.8.9- 三氟四環[4.4.0.12,5.17，1()]-3-十二烯、 8.8.9- 三（三氟甲基）四環[4·4·0.12,5·17，1()]-3-十二 烯、 8,85 9,9-四氟四環[4.4.0.12’5.17’1()]-3-十二烯、 8.8.9.9- 四（三氟甲基）四環[4.4.0.12,5.17，1()]-3-十二 烯、 8.8- 二氟-9 5 9-雙（三氟甲基）四環[4.4.0.12,5.17，1()]-3- 十二烯' 8.9- 二氟-8,9-雙（三氟甲基）四環[4·4.0·12,5·17，1()]-3- -15- 200808880 (12) 十二烯、 8.8.9- 三氟-9-三氟甲基四環[4·4·0.12,5·Γ，1()]·3-十二 烯、 8.8.9- 三氟-9-三氟甲氧基四環[4.4.0.12,5.17，1{)]-3-十二 烯、 8.8.9- 三氟-9-五氟丙氧基四環[4.4.0.12,5.17，1()]-3-十二 烯、 Φ 8-氟-8-五氟乙基-9,9-雙（三氟甲基）四環 [4.4.0. I2,5· l7，iG]-3-十二烯、 8,9-二氟-8-七氟異丙基-9-三氟甲基四環 [4.4.0·12,5.Γ，1()]-3,十二烯、 8-氯-8,959-三氟四環[4.4.0.12,5.17，1()]-3-十二烯、 8.9- 二氯-8,9-雙（三氟甲基）四環[4·4·0·12,5·Γ，1()]-3-十二烯、 8-( 2,252-三氟乙氧基羰基）四環[4.4.0.12,5.17，1()]-3-_ 十二烯、 8·甲基-8- ( 2,2,2-三氟乙氧基羰基）四環 [4 _ 4.0 · 1 2，5 · 17，1 G ] - 3 -十二烯等。 這些特定單體中，以 8-甲基-8-甲氧基羰基四環 [4.4.0.12’5.17’1()]-3-十二烯、8-亞乙基四環[4.4.0.12,5· l7’1G]-3·十二烯、8-乙基四環[4.4·0·12’5.Γ’1()]-3-十二烯、 五環[7.4.0.12’5.19’12.08’13]-3-十五烯，因可得具有優異的 耐熱性之環狀烯烴系樹脂的點，所以較理想。 -16- 200808880 (13) [共聚合性環狀單體] 作爲用以得到特定開環共聚合物之共聚合性環狀單 體，使用碳數4〜2 0，特別是5〜1 2的環狀烯烴較理想， 作爲其具體例，例如環丁烯、環戊烯、環庚烯、環辛烯、 三環[5_2·1·02,6]-3-癸烯、5·亞乙基-2-冰片烯、二環戊二烯 ' 等。 [含不飽和雙鍵的化合物] 作爲用以得到特定飽和共聚合物之含有不飽和雙鍵的 化合物，可使用聚丁二烯、聚異戊二烯、苯乙烯-丁二烯 共聚合物、乙烯-非共軛二烯共聚合物、聚冰片烯等主鏈 上含有碳-碳雙鍵的不飽和烴系聚合物。 特定單體與共聚合性環狀單體或含有不飽和雙鍵的化 合物之使用比例，係特定單體：共聚合性環狀單體或含有 不飽和雙鍵的化合物，以重量比爲1 〇 〇 : 〇〜5 0 : 5 〇較理 想，更理想爲1 0 0 : 〇〜6 0 : 4 0。 於共聚合性環狀單體或含有不飽和雙鍵的化合物的使 用比例太高的情況下，所得的共聚合物的Tg低，結果因 樹脂的耐熱性低，難以得到耐熱性高的薄膜。 [開環聚合觸媒] 特定單體的開環聚合反應係在複分解觸媒的存在下進 行。該複分解觸媒係選自鎢化合物、鉬化合物以及銶化合 物中至少1種金屬化合物（以下稱爲「（a)成分」）， -17- 200808880 (14) 與從週期表第1族元素（例如Li、Na、K等）、第2族元 素（如 Mg、Ca等）、第 12族元素（如 Zn、Cd、Hg 等）、第13族兀素（如B、A1等）、第4族元素（如 11、21等）或第14族元素（如8丨、811、？13等）的化合 物，至少具有1個該元素-碳鍵結或該元素-氫鍵結者當中 選擇至少1種化合物（以下稱爲「（ b )成分」）的組合 所構成者，爲了提高觸媒活性，也可含有添加劑（以下稱 _ 爲「（ e )成分」）。 作爲構成上述（a)成分的較合適的金屬化合物的具 體例，可例如WC16、MoC15、ReOCl3等日本公開專利特開 平1 -2405 1 7號公報所記載之金屬化合物。 作爲構成上述（b)成分的化合物的具體例，例如心 C4H9Li、（C2H5)3A1、（C2H5)2A1C1、（CiHsh 5A1C115、 (C2H5)A1C12、甲基銘氧院（methyl alumoxane) 、LiH 等 曰本公開專利特開平1 -2405 1 7號公報所記載之化合物。 ® 作爲上述（Ο成分，可使用醇類、醛類、酮類、胺 類等較合適，其他可使用日本公開專利特開平^2 4 05” . 號公報所示的化合物。 [氫化] 作爲本發明所使用的環狀烯烴系樹脂，除上述特定 (共）開環聚合物以及特定的飽和共聚合物外，可使用對 特定（共）開環聚合物加氫所得之氫化（共）聚合物，以 及將特定（共）開環聚合物藉由夫里得-夸夫特反應 18- 200808880 (15) (Friedel-Crafts )反應環化後將其氫化所得的氫化（共） 聚合物。 如此的氫化（共）聚合物，因具有優異的熱安定性’ 進行成形加工時、使用作爲製品時，藉由加熱可防止其特 性的劣化。 此處，氫化（共）聚合物之氫添加率，通常爲5 0 %以 上，較理想爲70%以上，更理想爲90%以上，又更理想 φ 爲95%以上，特別理想爲97%以上。 本發明所使用的環狀烯烴系樹脂，於3〇°C的三氯甲烷 中測定的特性黏度（Tlinh )爲〇·2〜5.0dl/g較理想。 而且，環狀烯烴系樹脂的平均分子量，以凝膠滲透層 析法（GPC )測定之換算聚苯乙烯的數量平均分子量 (Μη )爲 8,0 00〜1 00,000，重量平均分子量（Mw )爲 20,000〜300,000的範圍者較理想。 再者，環狀烯烴系樹脂的域克（Vicat)軟化點爲120 • 。(：以上較理想。 而且’本發明所使用之環狀烯烴系樹脂薄膜，可由上 述含有環狀烯烴系樹脂的樹脂組成物形成。於樹脂組成 物，除環狀烯烴系樹脂以外，可調配環狀烯烴系樹脂以外 的樹脂成分、安定劑、加工性提升劑等可調配於樹脂中的 各種添加劑。 本發明的光學薄膜，係由環狀烯烴系樹脂所構成，在 長度方向上有週期性的厚度變動之薄膜，滿足下述式 (A ) 、（ B )以及（C )所示的全部條件， -19- 200808880 (16) P-V<1 •••(A )； W>3 …（Β )； D<3〇 •••(c)； (式（A)中，P表示厚度變動中厚度的極大値（μη ) ’ V表示厚度變動中厚度的極小値（μπι )； 式（Β )中，W爲長度方向上極大厚度2點間的間 隔，在該2點的Ρ値比存在於該2點間之V的最小値大 0.1 ( μ m )以上的情況下被測定作爲最短的間隔，表示長 度方向的週期間隔（cm); 式（C)中，D表示薄膜厚度變化的斜率（ppm )之最 大値的絕對値）。 而且，圖1爲表示薄膜在長度方向的長度與薄膜的厚 度之關係圖，表示式（A)〜（C)中的P、V、W及D。 但是’在區間W1的兩端的P爲P1及P2，在區間W1的 極小値爲VI，在區間W2的兩端的P爲P2及P3，在區間 W2的極小値爲V2。 上述式（A)表示薄膜厚度的極大値與極小値的差 (μπι) ’P-V爲Ιμηι以下，雖隨薄膜厚度而異，較理想 爲0 · 8 μιη以下，更理想爲〇 · 5 μιη以下。 上述式（Β)之W表示在長度方向上有週期性的厚度 變動之薄膜的變動週期。該週期越長，因薄膜的光學波紋 變少’所以較理想。於本發明 Wk3cm，較理想爲 -20- 200808880 (17) W之5cm，更理想爲W27cm。 、上述式（C)之D表示薄膜厚度變化的斜率（ppm ) 之最大値的絕對値。D越小，因表示薄膜激烈的厚度變化 少，D的値越小越理想，D$30ppm，較理想爲DS25ppm， 更理想爲D < 2 0 p p m。 而且，於本發明，爲了正確地把握作爲評價之所謂十 字記號的程度，上述式（A)〜（C)中P、V、W及D分 φ 別的値，係使用薄膜厚度分佈測定裝置，以每1 mm爲測 定間隔，對測定的薄膜的厚度分佈之數値數據，基於 II S 60 63 2:200 1 (1 SO 1 1 5 6 2 :1 9 9 6)及該 JIS 的解說，進行過 濾處理所求得的値。厚度分佈測定裝置，因可以每1mm 以下的測定間隔連續地進行測定，具有0.025 μπι以下的厚 度解析能力，期望以0.0 1 μ m單位以下厚度測定値表示。 本發明的光學薄膜，係將環狀烯烴系樹脂藉由熔融擠 出法或溶液流鑄法等的方法製膜所得的未延伸的薄膜較理 φ 想，而且也可將未延伸的薄膜以縱向一軸延伸、橫向一軸 延伸、二軸延伸等的方法進行延伸處理所得的薄膜較理 想。這些之中，二軸延伸薄膜，較理想爲薄膜面內最大折 射率的方向（以下簡稱爲光軸）對薄膜的長度方向成爲垂 直方向之二軸延伸薄膜，因可發現良好的相位差及光軸， 具有作爲相位差薄膜的功能，可適合用於偏光板用途、液 晶顯不器用途。而且，未延伸薄膜，可適合使用作爲偏光 板的偏光子的保護膜等的光學薄膜。 本發明的光學薄膜，無特別限制，薄膜厚度通常爲1 -21 - 200808880 (18) 〜3 00μηι的程度，較理想爲10〜200μηι的程度，從使用性 的觀點較適合。此處，薄膜厚度係指薄膜厚度的平均値或 在薄膜平坦部所測定的厚度。 本發明的光學薄膜爲長薄膜較理想，長度方向的長度 通常爲50m以上，較理想爲l〇〇m以上。如此的長薄膜， 通常成爲薄膜捲備用。 本發明的光學薄膜爲具有作爲相位差薄膜的功能之薄 膜的情況下，作爲原料之未延伸的光學薄膜爲厚度不均 勻、光學上彎曲極少的原因，延伸所得的相位差薄膜，也 成爲局部的厚度不均勻、光學彎曲極少、薄膜外觀良好之 相位差、光軸安定之薄膜。本發明的光學薄膜爲具有作爲 相位差薄膜的功能之薄膜的情況下，由於厚度變動所造成 之光學波紋少，可適合使用於作爲相位差薄膜的各種用 途、作爲至少單面具有該薄膜之偏光板的各種用途，例如 使用於液晶顯示器的情況，辨識性顯著優異、且耐熱性、 與其他材料的密合性•黏著性也優異，可反應LCD面板 的高品味化。具有作爲相位差薄膜的功能之本發明的光學 薄膜’適合將未延伸薄膜之本發明的光學薄膜藉由延伸處 理而製造。 偏光板 本發明的偏光板，係爲至少一面上有上述具有作爲相 位差薄膜功能之本發明的光學薄膜，期望於偏光膜（偏光 子）的至少一面上層合本發明的相位差薄膜所構成者。作 -22- 200808880 (19) 爲構成本發明的偏光板之偏光膜，例如聚乙烯醇 (PVA) 、PV A的一部分縮甲醛化之聚合物等所構成的薄 膜，以碘、二色性染料等所構成的二色性物質進行染色處 理、延伸處理、交聯處理等以適當的順序、方法所得的薄 膜，使自然光入射時透過直線偏光者，特別是使用光的透 過率高、偏光度佳者較理想。 構成偏光板的偏光膜的厚度，一般適合使用5〜80μιη 者’於本發明沒有限制。而且，作爲偏光膜，除上述PVA 系薄膜外，只要可發現相同特性者，也可使用其他的薄 膜。例如，也可將環狀烯烴系樹脂所構成薄膜，以適當的 順序、方法施以染色處理、延伸處理、交聯處理等者。 通常偏光板係由偏光膜相位差薄膜及保護膜所構成， 於本發明，作爲構成偏光板的相位差薄膜係由環狀烯烴系 樹脂所構成，於偏光膜的至少一面上使用具有作爲相位差 薄膜功能之光學薄膜。如此之本發明的偏光板，因相位差 薄膜，其耐熱性、耐濕性、耐藥性等性質形狀優異，作爲 保護膜也具有充分的功能，在偏光膜上層合具有作爲相位 差薄膜功能之本發明的光學薄膜的面上，也可層合其他保 護膜。本發明的偏光板，只於偏光膜的單面上層合具有作 爲相位差薄膜功能之本發明的光學薄膜的情況，偏光膜的 另一面，也可層合例如三乙醯基纖維素（TAC )等習知的 保護膜。本發明的偏光板，較理想爲具有偏光膜的兩面上 層合關於本發明的相位差薄膜的構造。 如此本發明的偏光板，其各層藉由感壓黏著劑等習知 -23- 200808880 (20) 的接合劑、黏著劑黏著而可製造。接合劑、黏著劑爲透明 性佳者較理想，具體地例如天然橡膠、合成橡膠、乙酸乙 烯酯/氯化乙烯共聚合物、聚乙烯醚、丙烯酸酯系樹脂、 改性聚烯烴系樹脂等的黏著劑；具有羥基、胺基等官能基 之上述樹脂等中添加含有異氰酸酯基的化合物等的硬化劑 ' 之硬化型黏著劑；聚胺基甲酸乙酯系乾式層合用接合劑； 合成橡膠系接合劑；環氧系接合劑等。 φ 關於本發明的光學薄膜以及偏光板，因週期性的厚度 變動小，光學彎曲極少，特別適合使用於大畫面顯示之大 型液晶顯示器等的用途。關於本發明的光學薄膜、偏光 板，可使用於各種光學構件，可使用於各種液晶顯示器、 液晶投影機、電激發光顯示元件或觸控面板等。而且，有 用於作爲光碟的記錄•再生裝置之波長板。 液晶顯7K器 9 本發明的液晶顯示器，係具有上述本發明的光學薄膜 及/或偏光板者，較理想爲具有上述本發明的偏光板。本 發明的光學薄膜爲未延伸的薄膜的情況下，可適合使用作 爲偏光膜的保護膜。 本發明的液晶顯示器，因具有厚度變動小、光學波紋 極小之光學薄膜或偏光板，於液晶顯示器爲大型的情況 下，也顯示無光學彎曲、全面均勻。 光學薄膜的製造方法 -24- 200808880 (21) 關於本發明之環狀烯烴系樹脂薄膜，係將上述環狀烯 烴系樹脂或樹脂組成物成形而製造。作爲從環狀烯烴系樹 脂成形爲薄膜的方法，例如熔融擠出法、溶液流鑄法等的 方法，依據需要可再將其以縱向一軸延伸、橫向一軸延伸 或二軸延伸等的方法延伸的方法。亦即，關於本發明的光 學薄膜，係藉由熔融擠出法、溶液流鑄法等的方法將環狀 烯烴系樹脂成形於薄膜上之未延伸的薄膜，或將未延伸的 φ 薄膜進行延伸所成的薄膜。 於藉由溶液流鑄法製造關於本發明的光學薄膜的情 況，通常使用具有T型模頭之擠出機，將環狀烯烴系樹脂 製膜。於本發明，將作爲原料之環狀烯烴系樹脂，使用脈 動少的齒輪泵導入擠出機，在擠出機出口之極大壓力與平 均壓力的差爲平均壓力的0.2%以下，較理想爲0.1%以 下，期望可抑制出口壓力的週期性變動.。 而且，於藉由溶液流鑄法製造關於本發明的光學薄膜 • 的情況，使用具有聚合物過濾器之擠出機較理想，在聚合 物過濾器之樹脂滯留時間控制爲3〜1 0分鐘，較理想爲3 〜5分鐘的範圍。以溶液流鑄法製造樹脂薄膜的情況下， 若使用具有聚合物過濾器之擠出機，可高度地除去樹脂中 的膠質狀物質、異物，環狀烯烴系樹脂的熔點高，擠出成 形時的成形溫度也變成高溫，於滯留時間長的情況下通過 過濾器後，也可能因熱分解產生新的膠質狀物質，產生低 分子量的揮發物，有產生氣泡的情形。於本發明，藉由控 制在聚合物過濾器之環狀烯烴系樹脂的滯留時間，確保通 -25 - 200808880 (22) 過細網目的聚合物過濾器的滯留時間’且避免因滯留時間 長造成之薄膜品質降低。 而且，於藉由溶液流鑄法製造關於本發明的光學薄膜 的情況，期望使用從T型模頭吐出的熔融樹脂首先接觸的 轉印滾輪的表面爲陶瓷製，其表面粗糙度Rs的極大値 Rmax ( μπι)滿足RmaxS0.2，較理想爲RmaxSO.l的範圍 內之轉印滾輪。構成轉印滾輪的表面之陶瓷，例如爲氧化 • 銘、氧化鉻等。 使用如此的轉印滾輪，將環狀烯烴系樹脂成形爲薄膜 狀時，因滾輪與成形的薄膜的剝離性良好，滾輪表面的特 性沒有不均勻狀況，剝離時附加於薄膜的張力難以產生變 動，於所得的薄膜難以產生起因於剝離之週期性厚度的變 動。 連續製造光學薄膜時，通常使用剝離滾輪從轉印滾輪 捲取所製作的薄膜，期望滾輪的捲取速度的週期性變動 • 小，於本發明，除開始捲取時及結束時，於正常運轉時， 滾輪的捲取速度的極大値或極小値，與平均捲取速度的差 森 之絕對値，期望爲平均捲取速度的0.1 %以下，較理想爲 . 0.05 %以下的範圍。具體地，例如從滾輪的捲取速度爲 10m/分的情況下，控制變動爲±0.01 m/分以內。此處，連 續製造光學薄膜之製膜方法，無特別限制，控制上述的製 膜條件之熔融擠出法特別理想。 於本發明，除上述轉印滾輪，作爲相當於其下一滾輪 之剝離滾輪，期望使用表面爲陶瓷製、滾輪的表面粗糙度 -26- 200808880 (23)8-Difluoromethyltetracyclo[4.4.0·1 2'5.17,1G]-3-dodecene, 8-trifluoromethyltetracycline [HO.;!2,5·;!7,10] -Dodecene, 8-pentafluoroethyltetracyclo[4.4.0.1 L5·:!7'1 ϋ]-3-dodecene, 8.8-difluorotetracycline [4.4.0.12, 5.17,1() ]-3-dodecene, 859-difluorotetracyclo[4.4.0.12, 5.17'1()]-3-dodecene, 8.8-bis(trifluoromethyl)tetracyclo[4.4.0.12, 5.17, 1()]-3-dodecene, 8.9-bis(trifluoromethyl)tetracyclo[4·4_0·I2,5. 17,1()]·3-dodecene, 8-methyl-8 -trifluoromethyltetracyclo[4.4.0.12,5.17,1()]-3-dodecene, 8.8.9-trifluorotetracyclo[4.4.0.12,5.17,1()]-3-dodecene 8.8.9-Tris(trifluoromethyl)tetracyclo[4·4·0.12,5·17,1()]-3-dodecene, 8,85 9,9-tetrafluorotetracycline [4.4. 0.12'5.17'1()]-3-dodecene, 8.8.9.9-tetrakis(trifluoromethyl)tetracyclo[4.4.0.12,5.17,1()]-3-dodecene, 8.8-difluoro -9 5 9-bis(trifluoromethyl)tetracyclo[4.4.0.12,5.17,1()]-3-decadiene 8.9-difluoro-8,9-bis(trifluoromethyl)tetracyclic [4·4.0·12,5·17,1()]-3- -15- 200808880 (12) Decadiene, 8.8.9-trifluoro-9-trifluoromethyltetracyclo[4·4·0.12 ,5· ,1()]·3-dodecene, 8.8.9-trifluoro-9-trifluoromethoxytetracyclo[4.4.0.12,5.17,1{)]-3-dodecene, 8.8.9- Trifluoro-9-pentafluoropropoxytetracyclo[4.4.0.12, 5.17,1()]-3-dodecene, Φ 8-fluoro-8-pentafluoroethyl-9,9-bis(trifluoro Methyl)tetracyclo[4.4.0. I2,5·l7,iG]-3-dodecene, 8,9-difluoro-8-heptafluoroisopropyl-9-trifluoromethyltetracycline [4.4 .0·12,5.Γ,1()]-3, dodecene, 8-chloro-8,959-trifluorotetracyclo[4.4.0.12, 5.17,1()]-3-dodecene, 8.9- Dichloro-8,9-bis(trifluoromethyl)tetracyclo[4·4·0·12,5·Γ,1()]-3-dodecene, 8-(2,252-trifluoroethoxy Carbonyl)tetracyclo[4.4.0.12,5.17,1()]-3-_decadiene, 8·methyl-8-(2,2,2-trifluoroethoxycarbonyl)tetracyclo[4 _ 4.0 · 1 2,5 · 17,1 G ] - 3 - dodecene, etc. Among these specific monomers, 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.12'5.17'1()]-3-dodecene, 8-ethylenetetracyclo[4.4.0.12, 5·l7'1G]-3·dodecene, 8-ethyltetracyclo[4.4·0·12'5.Γ'1()]-3-dodecene, pentacyclic [7.4.0.12'5.19' 12.08 '13]-3-pentadecene is preferable since a point of a cyclic olefin-based resin having excellent heat resistance can be obtained. -16- 200808880 (13) [Copolymerizable cyclic monomer] As a copolymerizable cyclic monomer for obtaining a specific ring-opening copolymer, carbon number 4 to 2 0, particularly 5 to 12 2 is used. The cyclic olefin is preferred, and specific examples thereof include, for example, cyclobutene, cyclopentene, cycloheptene, cyclooctene, tricyclo[5_2·1·02,6]-3-decene, and 5-ethylene. -2-bornene, dicyclopentadiene, and the like. [Compound containing unsaturated double bond] As a compound containing an unsaturated double bond for obtaining a specific saturated copolymer, polybutadiene, polyisoprene, styrene-butadiene copolymer, or the like can be used. An unsaturated hydrocarbon-based polymer having a carbon-carbon double bond in a main chain such as an ethylene-non-conjugated diene copolymer or a polybornene. The ratio of the specific monomer to the copolymerizable cyclic monomer or the compound containing an unsaturated double bond is a specific monomer: a copolymerizable cyclic monomer or a compound containing an unsaturated double bond, in a weight ratio of 1 〇 〇: 〇~5 0 : 5 〇 is ideal, more ideally 1 0 0 : 〇~6 0 : 4 0. When the ratio of use of the copolymerizable cyclic monomer or the compound containing an unsaturated double bond is too high, the Tg of the obtained copolymer is low, and as a result, the heat resistance of the resin is low, and it is difficult to obtain a film having high heat resistance. [Open-loop polymerization catalyst] The ring-opening polymerization reaction of a specific monomer is carried out in the presence of a metathesis catalyst. The metathesis catalyst is selected from the group consisting of a tungsten compound, a molybdenum compound, and a ruthenium compound (hereinafter referred to as "(a) component"), -17-200808880 (14) and elements from the first group of the periodic table (for example) Li, Na, K, etc.), Group 2 elements (such as Mg, Ca, etc.), Group 12 elements (such as Zn, Cd, Hg, etc.), Group 13 halogen (such as B, A1, etc.), Group 4 a compound of an element (such as 11, 21, etc.) or a group 14 element (such as 8丨, 811, ?13, etc.) having at least one of the element-carbon bond or at least one of the element-hydrogen bond In order to improve the catalyst activity, a compound (hereinafter referred to as "(e) component) may be contained in a combination of a compound (hereinafter referred to as "(b) component"). As a specific example of a suitable metal compound constituting the above-mentioned component (a), for example, a metal compound described in Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. Specific examples of the compound constituting the component (b) include, for example, a core C4H9Li, (C2H5)3A1, (C2H5)2A1C1, (CiHsh 5A1C115, (C2H5)A1C12, methyl alumoxane, LiH, etc. The compound described in Japanese Unexamined Patent Publication No. Hei No. Hei No. Hei. No. 1 - 2405 No. 1 is a compound of the above-mentioned (the above-mentioned components, alcohols, aldehydes, ketones, amines, and the like are preferably used, and other Japanese patents can be used. A compound represented by the publication of the Japanese Patent No. 4 05". [Hydrogenation] The cyclic olefin-based resin used in the present invention may be used in addition to the above specific (co) ring-opening polymer and a specific saturated copolymer. Co-) hydrogenation (co)polymer obtained by hydrogenation of a ring-opening polymer, and cyclization of a specific (co) ring-opening polymer by Friedel-Crafts reaction 18-200808880 (15) (Friedel-Crafts) Then, the hydrogenated (co)polymer obtained by hydrogenating the hydrogenated (co)polymer has excellent thermal stability. When it is used as a product, it can be prevented from deteriorating by heating. Here, hydrogen The hydrogen addition ratio of the (co)polymer is usually 50% or more, more preferably 70% or more, more desirably 90% or more, still more preferably 95% or more, and particularly preferably 97% or more. The cyclic olefin resin to be used preferably has an intrinsic viscosity (Tlinh) of 〇·2 to 5.0 dl/g as measured in chloroform at 3 ° C. Further, the average molecular weight of the cyclic olefin resin is The number average molecular weight (?η) of the converted polystyrene measured by gel permeation chromatography (GPC) is 8,00 to 00,000, and the weight average molecular weight (Mw) is preferably in the range of 20,000 to 300,000. The cyclic olefin resin has a Vicat softening point of 120 Å. (The above is preferable. Further, the cyclic olefin resin film used in the present invention may be formed of the above resin composition containing a cyclic olefin resin. In addition to the cyclic olefin resin, various additives which can be blended in the resin, such as a resin component other than the cyclic olefin resin, a stabilizer, and a processability enhancer, can be added to the resin composition. Cyclic olefin A film composed of a resin and having a periodic thickness variation in the longitudinal direction satisfies all the conditions shown by the following formulas (A), (B), and (C), -19-200808880 (16) P-V< 1 •••(A ); W>3 ...(Β ); D<3〇•••(c); (In the formula (A), P represents the maximum thickness μ(μη) of the thickness variation] In the case of the variation, the thickness is extremely small (μπι); in the formula (Β), W is the interval between the two points of the maximum thickness in the length direction, and the ratio of the Ρ値 at the two points is the smallest V of the V between the two points. In the case of (μ m ) or more, it is measured as the shortest interval, and represents the periodic interval (cm) in the longitudinal direction. In the formula (C), D represents the absolute 値 of the maximum 値 of the slope (ppm) of the film thickness change. Further, Fig. 1 is a graph showing the relationship between the length of the film in the longitudinal direction and the thickness of the film, and shows P, V, W and D in the formulae (A) to (C). However, P at both ends of the interval W1 is P1 and P2, and the minimum 値 in the interval W1 is VI, P at both ends of the interval W2 is P2 and P3, and the minimum 値 in the interval W2 is V2. The above formula (A) shows the difference between the maximum 値 and the minimum 薄膜 of the film thickness (μπι) ‘P-V is Ιμηι or less, and varies depending on the thickness of the film, and is preferably 0·8 μm or less, more preferably 〇 5 μm or less. W of the above formula (Β) indicates a period of variation of the film having a periodic thickness variation in the longitudinal direction. The longer the period, the smaller the optical corrugation of the film is, which is preferable. In the Wk3cm of the present invention, it is preferably -20-200808880 (17) 5 cm of W, more preferably W27 cm. D of the above formula (C) represents the absolute enthalpy of the maximum enthalpy of the slope (ppm) of the film thickness change. The smaller D is, the less the thickness variation of the film is indicated, and the smaller the D is, the more ideal it is, D$30 ppm, more preferably DS25 ppm, more preferably D < 20 p p m. Further, in the present invention, in order to accurately grasp the degree of the so-called cross mark as the evaluation, in the above formulas (A) to (C), the P, V, W, and D points are different, and the film thickness distribution measuring device is used. The data of the thickness distribution of the measured film per 1 mm is measured based on II S 60 63 2:200 1 (1 SO 1 1 5 6 2 :1 9 9 6) and the JIS explanation. The enthalpy obtained by the filtering process. The thickness distribution measuring device can be continuously measured at a measurement interval of 1 mm or less, and has a thickness analysis capability of 0.025 μm or less. It is desirable to measure 値 in a thickness of 0.01 μm or less. The optical film of the present invention is an unstretched film obtained by a method such as a melt extrusion method or a solution casting method, and the unstretched film may be treated in a longitudinal direction. A film obtained by stretching treatment such as one-axis stretching, lateral-axis stretching, and biaxial stretching is preferable. Among these, the biaxially stretched film is preferably a biaxially stretched film in which the direction of the maximum refractive index in the in-plane of the film (hereinafter simply referred to as the optical axis) is perpendicular to the longitudinal direction of the film, because a good phase difference and light can be found. The shaft has a function as a retardation film and can be suitably used for polarizing plate applications and liquid crystal display applications. Further, as the unstretched film, an optical film such as a protective film of a polarizer of a polarizing plate can be suitably used. The optical film of the present invention is not particularly limited, and the film thickness is usually from 1 - 21 to 200808880 (18) to 30,000 μm, preferably from 10 to 200 μm, and is suitable from the viewpoint of usability. Here, the film thickness means the average 値 of the film thickness or the thickness measured at the flat portion of the film. The optical film of the present invention is preferably a long film, and the length in the longitudinal direction is usually 50 m or more, and more preferably 10 m or more. Such a long film is usually used as a film roll. When the optical film of the present invention is a film having a function as a retardation film, the unstretched optical film as a raw material has a thickness unevenness and an extremely small optical curvature, and the retardation film obtained by stretching is also partially localized. A film having a non-uniform thickness, a few optical bends, a good phase difference in film appearance, and an optical axis stability. When the optical film of the present invention is a film having a function as a retardation film, the optical waviness due to thickness variation is small, and it can be suitably used for various applications as a retardation film, and polarized light having the film on at least one side. Various uses of the board, for example, in the case of a liquid crystal display, are excellent in visibility, heat resistance, adhesion to other materials, and excellent adhesion, and can reflect the high taste of the LCD panel. The optical film of the present invention having a function as a retardation film is suitable for producing an optical film of the present invention in which an unstretched film is formed by stretching treatment. Polarizing Plate The polarizing plate of the present invention has the above-described optical film of the present invention having a function as a retardation film, and it is desirable to laminate the retardation film of the present invention on at least one surface of a polarizing film (polarizer). . -22-200808880 (19) In order to constitute a polarizing film of the polarizing plate of the present invention, for example, a film composed of polyvinyl alcohol (PVA) or a partially formalized polymer of PV A, iodine or a dichroic dye is used. The dichroic material formed by the dyeing process, the stretching process, the cross-linking process, etc., is obtained by an appropriate order or method, so that the natural light is transmitted through the linear polarizer, and in particular, the transmittance of the light is high, and the degree of polarization is good. Ideal. The thickness of the polarizing film constituting the polarizing plate is generally suitably 5 to 80 μm, which is not limited in the present invention. Further, as the polarizing film, in addition to the above PVA-based film, other thin films may be used as long as the same characteristics can be found. For example, a film composed of a cyclic olefin resin may be subjected to a dyeing treatment, an elongation treatment, a crosslinking treatment, or the like in an appropriate order and method. In general, the polarizing plate is composed of a polarizing film retardation film and a protective film. In the present invention, the retardation film constituting the polarizing plate is composed of a cyclic olefin resin, and is used as a phase difference on at least one surface of the polarizing film. Optical film for film function. The polarizing plate of the present invention has excellent properties such as heat resistance, moisture resistance, and chemical resistance due to the retardation film, and has a sufficient function as a protective film, and is laminated on the polarizing film to function as a retardation film. Other protective films may be laminated on the surface of the optical film of the present invention. In the polarizing plate of the present invention, only the optical film of the present invention having a function as a retardation film is laminated on one surface of the polarizing film, and the other side of the polarizing film may be laminated, for example, triethylenesulfonyl cellulose (TAC). A conventional protective film. The polarizing plate of the present invention preferably has a structure in which the retardation film of the present invention is laminated on both surfaces having a polarizing film. Thus, in the polarizing plate of the present invention, each layer can be produced by adhering a bonding agent or an adhesive of a conventional pressure-sensitive adhesive such as -23-200808880 (20). The bonding agent and the adhesive are preferably transparent, and specifically, for example, natural rubber, synthetic rubber, vinyl acetate/vinyl chloride copolymer, polyvinyl ether, acrylate resin, modified polyolefin resin, or the like. Adhesive; a curing agent for adding a curing agent such as a compound containing an isocyanate group to a resin having a functional group such as a hydroxyl group or an amine group; a polyurethane adhesive for dry lamination; and a synthetic rubber bonding Agent; epoxy-based bonding agent, and the like. φ The optical film and the polarizing plate of the present invention have a small variation in thickness and a small amount of optical bending, and are particularly suitable for use in a large-sized liquid crystal display or the like for large-screen display. The optical film or polarizing plate of the present invention can be used for various optical members, and can be used for various liquid crystal displays, liquid crystal projectors, electroluminescence display elements, touch panels, and the like. Further, there is a wavelength plate for use as a recording/reproducing device for a compact disc. Liquid crystal display 7K The liquid crystal display of the present invention has the above-described optical film and/or polarizing plate of the present invention, and preferably has the above-described polarizing plate of the present invention. When the optical film of the present invention is an unstretched film, a protective film as a polarizing film can be suitably used. The liquid crystal display of the present invention has an optical film or a polarizing plate having a small thickness variation and an extremely small optical corrugation. When the liquid crystal display is large, it also exhibits no optical bending and is uniform. In the case of the cyclic olefin resin film of the present invention, the above cyclic olefin resin or resin composition is molded and produced. As a method of forming a film from a cyclic olefin-based resin into a film, for example, a method such as a melt extrusion method or a solution casting method, if necessary, it may be extended in a longitudinal direction, a lateral axis, or a biaxial direction. method. In other words, the optical film of the present invention is obtained by a method such as a melt extrusion method or a solution casting method, in which a cyclic olefin resin is formed on an unstretched film on a film, or an unstretched φ film is stretched. The resulting film. In the case of producing the optical film of the present invention by a solution casting method, a cyclic olefin-based resin is usually formed by using an extruder having a T-die. In the present invention, the cyclic olefin resin as a raw material is introduced into the extruder using a gear pump having a small pulsation, and the difference between the maximum pressure and the average pressure at the outlet of the extruder is 0.2% or less of the average pressure, preferably 0.1. Below %, it is desirable to suppress periodic variations in outlet pressure. Further, in the case of producing the optical film of the present invention by solution casting, it is preferred to use an extruder having a polymer filter, and the resin residence time in the polymer filter is controlled to 3 to 10 minutes. It is ideally a range of 3 to 5 minutes. When a resin film is produced by a solution casting method, if an extruder having a polymer filter is used, the colloidal substance or foreign matter in the resin can be highly removed, and the melting point of the cyclic olefin resin is high, and extrusion molding is performed. The molding temperature also becomes a high temperature, and when it passes through the filter in the case where the residence time is long, a new colloidal substance may be generated by thermal decomposition, and a low molecular weight volatile substance may be generated, and bubbles may be generated. In the present invention, by controlling the residence time of the cyclic olefin resin in the polymer filter, it is ensured that the residence time of the polymer filter of the ultrafine mesh is improved by the period of '25-200808880 (22) and the long residence time is avoided. The film quality is reduced. Further, in the case of producing the optical film of the present invention by the solution casting method, it is desirable that the surface of the transfer roller which is first contacted with the molten resin discharged from the T-die is made of ceramic, and the surface roughness Rs is extremely large. Rmax (μπι) satisfies RmaxS0.2, and is preferably a transfer roller in the range of RmaxSO.l. The ceramic constituting the surface of the transfer roller is, for example, oxidized, chromized, or the like. When the cyclic olefin resin is formed into a film shape by using such a transfer roller, the peeling property of the roller and the formed film is good, and the characteristics of the surface of the roller are not uneven, and the tension applied to the film during peeling is less likely to fluctuate. It is difficult for the obtained film to cause variations in the periodic thickness due to peeling. When the optical film is continuously produced, the film to be produced is usually taken up from the transfer roller by using a peeling roller, and the periodic fluctuation of the winding speed of the roller is desired to be small. In the present invention, the normal operation is performed at the beginning and at the end of the winding. When the winding speed of the roller is extremely small or extremely small, and the difference between the average winding speed and the average winding speed is 値, it is desirably 0.1% or less of the average winding speed, and preferably 0.05% or less. Specifically, for example, when the take-up speed of the roller is 10 m/min, the control variation is within ±0.01 m/min. Here, the film forming method for continuously producing an optical film is not particularly limited, and a melt extrusion method for controlling the above film forming conditions is particularly preferable. In the present invention, in addition to the above-mentioned transfer roller, as a peeling roller corresponding to the next roller, it is desirable to use a surface roughness of ceramics and rollers -26-200808880 (23)

Rs的極大値Rmax ( μπι)滿足Rmax<0.2，較理想爲Rmax S0.1的範圍內之捲取滾輪。構成捲取滾輪的表面之陶瓷， 例如爲氧化鋁、氧化鉻等。使用如此的捲取滾輪捲取製作 的薄膜時，因捲取滾輪與薄膜的剝離性良好，滾輪表面的 特性沒有不均勻狀況，剝離時附加於薄膜的張力難以產生 變動，於所得的薄膜難以產生起因於剝離之週期性厚度的 變動。 實施例 以下，基於實施例更具體地說明本發明，但本發明不 限於這些實施例。 以下，說明本發明具體的實施例，但本發明不限於這 些實施例。而且，以下「份」、「％」除特別限定外係指 「重量份」、「重量％」。 而且，以下實施例中，玻璃轉化溫度、飽和吸水率、 • 全光線透過率、透過光的面內相位差、薄膜厚度方向的光 軸傾斜角度、偏光板的透過率以及偏光度、反射率、亮點 數以及耐擦傷性，係藉由下述方法測定。 [玻璃轉化溫度（Tg)] 使用精工儀器公司製（Seiko instruments)差示掃描 熱量計（DSC )，在氮氣環境下升溫速度爲20 °C /分的條 件，測定玻璃轉化溫度。 -27- 200808880 (24) [飽和吸水率] 根據A S TM D 5 7 0，於2 3 °C的水中將樣品浸漬！週， 、測定浸漬前後的樣品的重量變化，由其値求出飽和吸水 。 [全光線透過率] 使用村上色彩技術硏究所製霧度計「Η Μ -1 5 0型」， φ 測定全光線透過率。 [透過光的面內相位差（R0)] 使用王子計測機器（股）製「KORBA-21ADH」，光 垂直於薄膜入射時的面內相位差（R0 )，於波長5 5 0nm 進行測定。 [偏光板的透過率以及偏光度] • 使用王子計測機器（股）製「KORBA-21ADH」，測 定偏光板的透過率以及偏光度。測定波長爲5 50nm。 [薄膜厚度分佈以及厚度變化的斜率的計算] 使用薄膜厚度分佈測定裝置（MOCON Profiler輪廓測 定儀），測定薄膜長度方向。測定間隔爲每1 mm 測定师J 開始150mm分的測定値與測定結束時100mm分的測定 値，因會影響測定誤差，所以除外。該數據基於 JIS B0632:200 1 (ISO 1 1 562:1 996)以及 JIS 的解說’適用移 -28- 200808880 (25) 動箱係數過濾器（取鄰接共5點的測定値的平均値作爲第 1段的數據之操作進行5段），求出厚度分佈的校正曲線 (輪廓曲線過濾器之長波長成分），從該校正曲線求出上 述式（A)及（B)的P、V、W。上述式（c)的D，於該 校正曲線使用數値微分的3點公式求得。 <合成例1> φ 於氮氣取代的反應器中，放入作爲特定單體之8-甲 基-8-殘基甲基四環[4.4.0.12,5.17，1()]_3-十二；(：希225份、作 爲特定單體之雙環[2·2·1]庚-2-烯25份、作爲分子量調節 劑之b己烯2 7份以及作爲溶劑的甲苯7 5 0份，加熱該溶 液至6 0 °C。然後，於反應容器內的溶液，添加〇. 62份的 含有ί辰度1.5吴耳/升之二乙基錫的甲苯溶液以及3.7份的 含有以第3 丁醇與甲醇改性的六氯化鎢（第3 丁醇：甲 醇：鎢= 0.35莫耳：〇·3莫耳：.1莫耳）濃度〇·〇5莫耳/升 φ 之甲苯溶液，作爲聚合觸媒，將該反應系於8 0 °C下藉由加 熱攪拌3小時，進行開環共聚合反應，得到開環共聚合物 溶液。 將如此所得的開環共聚合物溶液1 000份放入高壓 釜，於該開環共聚合物溶液添力α 0.12 份的 RuHC1(CO)[P(C6H5)3]3，在氫氣壓 lOOkg/cm2、反應溫度 1 65 °C的條件下，加熱攪拌3小時，進行氫化反應，所得 的反應溶液（氫化聚合物溶液）冷卻後，釋放氫氣壓力。 將該反應溶液注入大量的甲醇中，分離回收凝固物，使其 -29- 200808880 (26) 乾燥，得到氫化聚合物（以下稱爲「樹脂A1」）。該樹 月旨A使用1H-NMR測定之氫添加率爲99.9%。 對樹脂A1，藉由凝膠滲透層析法（GPC、溶劑：四氫 呋喃），測定換算聚苯乙烯的數量平均分子量（Μη )以及 重量平均分子量（Mw)時，數量平均分子量（Μη)爲 20,800，重量平均分子量（Mw)爲 62,000，分子量分佈 (Mw/Mn )爲 3.00。而且，樹脂 A的玻璃轉化溫度 φ ( Tg )爲13〇°C，23°C之飽和吸水率爲0.3%。而且，在 30°C的三氯甲烷中測定特性黏度（Tiinh)時爲0.51dl/g。 <調製例1> 於反應容器中放入250份的蒸餾水，於該反應容器添 加丙烯酸丁酯90份、甲基丙烯酸2 -羥基乙酯8份、二乙 烯基苯2份、油酸鉀0 · 1份後，將該系統藉由聚四氟乙烯 製的攪拌翼攪拌進行分散處理。然後，將該反應容器內以 φ 氮氣取代後’將該系統升溫至5 0 °C，添加過硫酸鉀〇.2 份，開始進行聚合。從開始聚合經過2小時後，再於聚合 反應系統添加過硫酸鉀〇. 1份後，將該系統升溫至8 0 °C， 經過1小時繼續聚合反應，得到聚合物分散液。 然後’使用蒸發器’將聚合物分散液濃縮至固體成分 濃度爲7 〇 %爲止’得到丙儲酸酯系聚合物的水系分散髒所 構成的水系黏著劑（具有極性基之黏著劑）。 對構成如此所得的水系黏著劑（以下稱爲「水系黏著 劑A」）的丙烯酸酯系聚合物，藉由凝膠滲透層析法 -30· 200808880 (27) (GPC '溶劑：四氫呋喃），測定換算聚苯乙烯的數量平 均分子量（Μη)以及重量平均分子量（Mw)時’數量平 均分子量（Μη )爲 69,000，重量平均分子量（Mw )爲 135,000 ° 而且，水系黏著劑A在30°C的三氯甲烷中測定特性 _ 黏度（η—)時爲 1.2dl/g。 [實施例1] 將樹脂A使濃度成爲3 0 %地溶解於甲苯。所得的溶 液之室溫時溶液黏度爲30,000mPa.s。於該溶液，對樹脂 A100份而言添加0.3份的異戊四醇四[3-(3,5-二第3 丁 基_4_羥基苯基）丙酸酯]作爲抗氧化劑，將所得的溶液， 使用日本精線製孔徑5 μιη的金屬纖維燒結過濾器，壓差爲 0.4MPa以內收集，一邊控制溶液的流速一邊過濾後，使 用二軸擠出機（東芝機械公司製；TEM-48 )，藉由3段 排氣，一邊除去甲苯氣體，使用齒輪泵朝下游擠出，使用 通稱孔徑爲1 〇μηι之日本精線製的金屬纖維燒結過濾器， 進行熔融過濾，使用衣架型Τ型模頭（650mm寬），Τ型 模頭出口的間隙爲0.5mm，於280 °C下擠出膜狀。此時， 在擠出機出口之極大壓力與平均壓力的差爲0.1%。而 且，熔融狀態下，從T型模頭吐出之樹脂中甲苯的含量爲 0.05% 〇 將擠出的薄膜，夾於表面塗佈氧化鋁的表面粗度Rs 的極大値Rmax ( μπι )爲〇. 1之轉印滾輪與〇 . 3 mm厚的金 200808880 (28) 屬皮帶之間，將薄膜表面轉印爲光澤面。 然後，使用表面塗佈氧化鋁的表面粗度Rs的極大値 Rmax ( μηι )爲〇」之剝離滾輪進行剝離。此時，滾輪的 捲取速度的極大値或極小値，與平均捲取速度的差之絕對 値爲0 . 〇 4 %。 然後，從鏡面滾輪剝離之樹脂薄膜，使其與聚乙烯製 厚度50μιη的保護薄膜貼合，得到厚度ΙΟΟμιη、長度 φ 2000m的樹脂薄膜（以下亦稱爲「樹脂薄膜（a- 1 )」）。關於該樹脂薄膜（a-1 )，各種評價的結果，表 示於表1。而且，所得的樹脂薄膜（a-1 )的全光線透過率 爲 93%。 [實施例2] 使用實施例1所得的樹脂薄膜（a-Ι )，在Tg+10°C， 使用夾輪式縱向一軸延伸機，延伸爲1.3倍後，在Tg + 10 °C使用拉幅機式橫延伸機，延伸爲1.5倍，得到樹脂薄膜 (a-2 )。樹脂薄膜（a-2 )的面內相位差（R〇 )爲50nm。 而且，各種評價的結果，歸納於表1。該樹脂薄膜（a-2 ) 的全光線透過率爲93%。 [實施例3] 將厚度5 0 μ m的聚乙烯醇薄膜，一邊浸漬於5 g的碘、 25 0g的碘化鉀、10g的硼酸以及1 000g的水所成的40°C的 浴，一邊以約5分鐘進行一軸延伸至4倍，得到偏光膜。 -32- 200808880 (29) 於該偏光膜的表面，使用調整例1所得的水系黏著劑’分 別將窨施例1製作的樹脂薄膜（a -1 )與實施例2製作的 樹脂薄膜（a-2)貼合於偏光膜的各一面，得到透過率40 %、偏光度99.9%的偏光板（1)。對該偏光板（1) ’在 ^ 80它、90%相對濕度的條件下’進行500小時的耐久測 試，其外觀變化以目視觀察時，認爲沒有任何白化、膨脹 等的外觀異常，而且’關於偏光度’對初期値而言可保持 肇 9 5 %以上的偏光度，確認具有耐久性。而且，該偏光板 (1)以2片互爲垂直偏光的狀態下，從一側照射亮度 lOOOOcd的背光時，從另一側觀察確認無起因於漏光之帶 狀的不均勻。 [比較例1] 於實施例1中，除在擠出機出口之極大壓力與平均壓 力的差爲0.5%，將擠出的薄膜’使用表面粗度Rs的極大 値Rmax(pm)爲0·5但表面不塗佈氧化鋁之具金屬面的 轉印滾輪，表面不塗佈氧化銘表面粗度Rs的極大値Rmax (μιη)爲0.5之剝離滾輪進行剝離，此時滾輪的捲取速度 的極大値或極小値，與平均捲取速度的差之絕對値爲〇. 1 5 %以外，同樣地得到樹脂薄膜（b-Ι )。樹脂薄膜（b-Ι ) 的各種評價的結果，歸納於表1。該樹脂薄膜（b-1 )的全 光線透過率爲92%。 [比較例2] -33- 200808880 (30) 除使用樹脂薄膜（b_l)以外’與實施例2同樣地進 行延伸’得到樹脂薄膜（b - 2 )。該樹脂薄膜（b - 2 )的相 位差，薄膜面內的相位差（R0 )爲49nm。而且，各種評 價的結果’歸納於表1。而且，該樹脂薄膜（b - 2 )的全光 線透過率爲92%。 [比較例3] φ 除使用樹脂薄膜（b-Ι )取代樹脂薄膜（a-Ι )，使用 樹脂薄膜（b-2 )取代樹脂薄膜（a-2 )以外，與實施例3 同樣地得到透過率40%、偏光度99.9%的偏光板（2 )。 對該偏光板（2 )，在80T：、90%相對濕度的條件下，進 行5 00小時的耐久測試，其外觀變化以目視觀察時，認爲 沒有任何白化、膨脹等的外觀異常，而且，關於偏光度， 對初期値而言可保持9 5 %以上的偏光度，確認具有耐久 性。但是，該偏光板（2 )以2片互爲垂直偏光的狀態 # 下，從一側照射亮度lOOOOcd的背光時，從另一側觀察確 認有起因於漏光之帶狀的不均勻。 表1 實施例1 奮施例2 比較例1 P-V(um) 0.7 0.4 1.8 1.4 V(cm) 5 7 2.3 Z8___ D(ppm) 24 16 45 34 . 〔產業上的利用可能性〕 -34- 200808880 (31) 關於本發明的光學薄膜、偏光板，可使用於各種光學 零件。例如可使用於手機、數位資訊終端、傳呼機、導航 機、車用液晶顯示器、液晶監視器、調光面板、OA (辦 公室自動化）機器用顯示器、AV (影音）機器用顯示器 等關於本發明的各種液晶顯示器、液晶投影機、電激發光 顯示元件或觸控面板等。而且，有用於CD、CD-R、MD、 MO、DVD等光碟的記錄·再生裝置所使用的波長板。 φ 關於本發明的光學薄膜以及偏光板，因週期性的厚度 變動小，光學彎曲極少，特別適合使用於大畫面顯示之大 型液晶顯示器等的用途。 【圖式簡單說明】 圖1爲表示基於薄膜長度方向的長度與薄膜的厚度的 關係之各參數的圖。 # 【主要元件符號說明】 P ( PI、P2及P3 ):薄膜厚度的極大値 < V ( V 1及V2 ):薄膜厚度的極小値 • w ( w 1及W2 ):極大厚度2點間的P値比存在於該 2點間之V的最小値大0.1 μιη以上的情況下之最短的間隔 (長度方向的週期間隔） D :薄膜厚度變化的斜率之最大値的絕對値 -35- 200808880The maximum 値Rmax (μπι) of Rs satisfies Rmax < 0.2, preferably a winding roller in the range of Rmax S0.1. The ceramic constituting the surface of the take-up reel is, for example, alumina, chrome oxide or the like. When the film produced by winding up the winding roller is used, the peeling property of the winding roller and the film is good, and the characteristics of the surface of the roller are not uneven. The tension applied to the film during peeling is less likely to fluctuate, and the obtained film is less likely to be generated. A change in the periodic thickness resulting from peeling. EXAMPLES Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited to these examples. Hereinafter, specific embodiments of the present invention will be described, but the present invention is not limited to these embodiments. In addition, the following "parts" and "%" mean "parts by weight" and "% by weight" unless otherwise specified. Further, in the following examples, the glass transition temperature, the saturated water absorption rate, the total light transmittance, the in-plane phase difference of the transmitted light, the tilt angle of the optical axis in the film thickness direction, the transmittance of the polarizing plate, the degree of polarization, the reflectance, The number of bright spots and scratch resistance were measured by the following methods. [Glass transition temperature (Tg)] The glass transition temperature was measured using a Seiko instruments differential scanning calorimeter (DSC) under a nitrogen atmosphere at a rate of 20 ° C /min. -27- 200808880 (24) [Saturated water absorption] According to A S TM D 5 7 0, the sample is immersed in water at 23 ° C! Week, the weight change of the sample before and after the immersion was measured, and the saturated water absorption was determined from the enthalpy. [Total Light Transmittance] Using the Murakami Color Technology Research Institute's Haze Meter "Η Μ -1 50 Type", φ measures the total light transmittance. [In-plane phase difference (R0) of transmitted light] The "KORBA-21ADH" manufactured by Oji Scientific Instruments Co., Ltd. was used, and the light was measured at a wavelength of 550 nm perpendicular to the in-plane phase difference (R0) at the time of incidence of the film. [Transmittance and Polarization of Polarizing Plate] • The transmittance and polarization of the polarizing plate were measured using "KORBA-21ADH" manufactured by Oji Scientific Instruments Co., Ltd. The measurement wavelength was 5 50 nm. [Calculation of film thickness distribution and slope of thickness change] The film length direction was measured using a film thickness distribution measuring device (MOCON Profiler profiler). The measurement interval is measured at 150 mm per 100 mm from the tester J and 100 mm at the end of the measurement. This is because the measurement error is affected. This data is based on JIS B0632:200 1 (ISO 1 1 562:1 996) and JIS's explanation 'Applicable shift -28- 200808880 (25) Moving box coefficient filter (take the average of 値 邻接 共 共 共 5 5 値The operation of the data of one stage is performed in five stages), and the calibration curve of the thickness distribution (long-wavelength component of the contour curve filter) is obtained, and P, V, and W of the above formulas (A) and (B) are obtained from the calibration curve. . D of the above formula (c) is obtained by using the three-point formula of the number 値 differential in the calibration curve. <Synthesis Example 1> φ In a reactor substituted with nitrogen, an 8-methyl-8-resin methyltetracyclic ring as a specific monomer was placed [4.4.0.12, 5.17, 1()]_3-tweldium (: 225 parts, 25 parts of bicyclo [2·2·1]hept-2-ene as a specific monomer, 27 parts of b-hexene as a molecular weight regulator, and 75 parts of toluene as a solvent, heating The solution was added to 60 ° C. Then, in the solution in the reaction vessel, 62 parts of a toluene solution containing 1.5 mil/liter of diethyl tin and 3.7 parts of a third butanol were added. Methanol-modified tungsten hexachloride (3rd butanol: methanol: tungsten = 0.35 mole: 〇 · 3 mole: .1 mole) concentration 〇 · 〇 5 mol / liter of toluene solution, as a polymerization The catalyst was subjected to ring-opening copolymerization by heating and stirring at 80 ° C for 3 hours to obtain a ring-opening copolymer solution. The thus obtained ring-opening copolymer solution was put in 1,000 parts. In the autoclave, a 0.12 part portion of RuHC1(CO)[P(C6H5)3]3 is added to the ring-opening copolymer solution, and the mixture is heated and stirred under a hydrogen pressure of 100 kg/cm2 and a reaction temperature of 1 65 °C. Hour, carry out After the reaction, the obtained reaction solution (hydrogenated polymer solution) is cooled, and the hydrogen pressure is released. The reaction solution is poured into a large amount of methanol, and the coagulum is separated and recovered, and dried at -29-200808880 (26) to obtain a hydrogenated polymer. (hereinafter referred to as "resin A1"). The hydrogen addition ratio of the tree A was measured by 1H-NMR to be 99.9%. The resin A1 was measured by gel permeation chromatography (GPC, solvent: tetrahydrofuran). The number average molecular weight (?n) and the weight average molecular weight (Mw) of the polystyrene have a number average molecular weight (??) of 20,800, a weight average molecular weight (Mw) of 62,000, and a molecular weight distribution (Mw/Mn) of 3.00. The glass transition temperature φ (Tg ) of A is 13 〇 ° C, and the saturated water absorption at 23 ° C is 0.3%, and is 0.51 dl / g when the intrinsic viscosity (Tiinh) is measured in chloroform at 30 ° C. <Preparation Example 1> 250 parts of distilled water was placed in a reaction container, and 90 parts of butyl acrylate, 8 parts of 2-hydroxyethyl methacrylate, 2 parts of divinylbenzene, and potassium oleate 0 were added to the reaction container. · After 1 part, the system is used by The stirring blade of tetrafluoroethylene was stirred and dispersed, and then the inside of the reaction vessel was replaced with φ nitrogen, and the temperature of the system was raised to 50 ° C, and 2 parts of potassium persulfate was added to start polymerization. After the polymerization was carried out for 2 hours, 1 part of potassium persulfate was added to the polymerization system, and the system was heated to 80 ° C, and the polymerization was continued for 1 hour to obtain a polymer dispersion. Then, the polymer dispersion was concentrated to a solid concentration of 7 〇 % using an evaporator to obtain an aqueous adhesive (adhesive having a polar group) composed of a water-based dispersion of a propyl acrylate polymer. The acrylate-based polymer constituting the water-based adhesive (hereinafter referred to as "water-based adhesive A") thus obtained is measured by gel permeation chromatography -30· 200808880 (27) (GPC 'solvent: tetrahydrofuran). The number average molecular weight (Μη) of the converted polystyrene and the weight average molecular weight (Mw) were 'the number average molecular weight (?η) was 69,000, the weight average molecular weight (Mw) was 135,000 °, and the water-based adhesive A was at 30 °C. The characteristic _ viscosity (η-) in the methyl chloride was 1.2 dl/g. [Example 1] Resin A was dissolved in toluene at a concentration of 30%. The resulting solution had a solution viscosity of 30,000 mPa.s at room temperature. To this solution, 0.3 parts of isopentaerythrin tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] was added as an antioxidant to 100 parts of the resin A, and the obtained The solution was collected using a metal fiber sintered filter having a pore size of 5 μm in Japan, and the pressure difference was 0.4 MPa. The mixture was filtered while controlling the flow rate of the solution, and a two-axis extruder (TEM-48, manufactured by Toshiba Machine Co., Ltd.) was used. The toluene gas is removed by the three-stage exhaust, and is extruded downstream using a gear pump, and a metal fiber sintered filter of a Japanese fine wire having a pore diameter of 1 〇μηι is used for melt filtration, and a coat hanger type die is used. The head (650 mm wide) has a gap of 0.5 mm at the exit of the die, and is extruded at 280 °C. At this time, the difference between the maximum pressure at the outlet of the extruder and the average pressure was 0.1%. Further, in the molten state, the content of toluene in the resin discharged from the T-die is 0.05%. The maximum thickness 値Rmax (μπι) of the surface roughness Rs of the extruded film sandwiched on the surface-coated alumina is 〇. 1 transfer roller and 〇. 3 mm thick gold 200808880 (28) is between the belt, the film surface is transferred to the glossy surface. Then, peeling was performed using a peeling roller having a surface roughness Rs of the surface-coated alumina of a maximum 値 Rmax (μηι ) of 〇. At this time, the absolute speed of the take-up speed of the roller is extremely small or very small, and the absolute difference between the roll speed and the average take-up speed is 0. 〇 4 %. Then, the resin film peeled off from the mirror roller was bonded to a protective film having a thickness of 50 μm made of polyethylene to obtain a resin film having a thickness of ΙΟΟπη and a length of φ 2000 m (hereinafter also referred to as "resin film (a-1)"). The results of various evaluations of the resin film (a-1) are shown in Table 1. Further, the obtained resin film (a-1) had a total light transmittance of 93%. [Example 2] Using the resin film (a-Ι) obtained in Example 1, a tenter type longitudinal one-axis stretching machine was used at a Tg of 10 ° C, and the stretching was 1.3 times, and then the tenter was used at Tg + 10 ° C. The machine type transverse stretcher was extended to 1.5 times to obtain a resin film (a-2). The in-plane retardation (R〇) of the resin film (a-2) was 50 nm. Moreover, the results of various evaluations are summarized in Table 1. The total light transmittance of the resin film (a-2) was 93%. [Example 3] A polyvinyl alcohol film having a thickness of 50 μm was immersed in a 40 ° C bath formed by immersing 5 g of iodine, 25 g of potassium iodide, 10 g of boric acid, and 1 000 g of water. One axis was extended to 4 times in 5 minutes to obtain a polarizing film. -32- 200808880 (29) The resin film (a-1) produced in Example 1 and the resin film produced in Example 2 were respectively used for the surface of the polarizing film using the water-based adhesive obtained in Adjustment Example 1 (a- 2) The polarizing plate (1) having a transmittance of 40% and a degree of polarization of 99.9% was obtained by bonding to each side of the polarizing film. The polarizing plate (1) was subjected to a durability test for 500 hours under conditions of 80% and 90% relative humidity, and when the appearance was changed by visual observation, it was considered that there was no abnormal appearance such as whitening or swelling, and With respect to the degree of polarization, it is possible to maintain a degree of polarization of 肇95 % or more for the initial flaw, and it is confirmed that it has durability. Further, in the case where the polarizing plate (1) is irradiated with a backlight having a luminance of 100 cd from one side in a state where the two sheets are vertically polarized, it is observed from the other side that no unevenness due to light leakage is observed. [Comparative Example 1] In Example 1, except that the difference between the maximum pressure and the average pressure at the outlet of the extruder was 0.5%, the maximum 値Rmax(pm) of the surface roughness Rs of the extruded film was 0. 5, but the surface is not coated with a metal-coated transfer roller of alumina, the surface is not coated with an oxidized surface roughness Rs, the maximum 値Rmax (μιη) is 0.5 peeling roller for stripping, at this time the winding speed of the roller The resin film (b-Ι) was obtained in the same manner as the absolute value of the difference between the maximum winding speed and the average winding speed. The results of various evaluations of the resin film (b-Ι) are summarized in Table 1. The resin film (b-1) had a total light transmittance of 92%. [Comparative Example 2] -33-200808880 (30) In the same manner as in Example 2 except that the resin film (b-1) was used, the resin film (b-2) was obtained. The phase difference of the resin film (b-2) and the phase difference (R0) in the plane of the film were 49 nm. Moreover, the results of the various evaluations are summarized in Table 1. Further, the resin film (b-2) had a total light transmittance of 92%. [Comparative Example 3] φ was obtained in the same manner as in Example 3 except that the resin film (b-Ι) was used instead of the resin film (a-Ι), and the resin film (b-2) was used instead of the resin film (a-2). A polarizing plate (2) having a rate of 40% and a polarization degree of 99.9%. The polarizing plate (2) was subjected to an endurance test for 500 hours under conditions of 80T: and 90% relative humidity, and when the appearance was changed by visual observation, it was considered that there was no abnormal appearance such as whitening or swelling, and Regarding the degree of polarization, it is possible to maintain a degree of polarization of 90% or more for the initial flaw, and it is confirmed that it has durability. However, when the polarizing plate (2) is irradiated with a backlight having a brightness of 100 cd from one side in a state where the two sheets are vertically polarized, the unevenness of the band due to light leakage is confirmed from the other side. Table 1 Example 1 Exciting Example 2 Comparative Example 1 PV (um) 0.7 0.4 1.8 1.4 V (cm) 5 7 2.3 Z8___ D (ppm) 24 16 45 34 . [Industrial Utilization] -34- 200808880 ( 31) The optical film and the polarizing plate of the present invention can be used for various optical parts. For example, it can be used in a mobile phone, a digital information terminal, a pager, a navigation machine, a vehicle liquid crystal display, a liquid crystal monitor, a dimming panel, an OA (office automation) machine display, an AV (Audio Visual) machine display, etc., relating to the present invention. Various liquid crystal displays, liquid crystal projectors, electroluminescent display elements or touch panels. Further, there are wavelength plates used in recording/reproducing apparatuses for optical discs such as CDs, CD-Rs, MDs, MOs, and DVDs. φ The optical film and the polarizing plate of the present invention have a small variation in thickness and a small amount of optical bending, and are particularly suitable for use in a large-sized liquid crystal display or the like for large-screen display. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing respective parameters based on the relationship between the length in the longitudinal direction of the film and the thickness of the film. # [Main component symbol description] P (PI, P2, and P3): Maximum thickness of film thickness < V (V 1 and V2 ): extremely small film thickness 値 w ( w 1 and W2 ): between 2 points of maximum thickness The P値 ratio is the shortest interval (the periodic interval in the longitudinal direction) in the case where the minimum V of the V between the two points is 0.1 μm or more. D: The absolute value of the slope of the film thickness change 値-35- 200808880

(式（1)中，R1〜R4爲氫原子、鹵原子、碳數1〜30之 烴基或其他的1價有機基，可分別爲相同或相異；且Rl〜 R4中任意2個可互相鍵結而形成單環或多環構造；m爲0 或正的整數，p爲0或正的整數）。 3 .如申請專利範圍第1項或第2項之光學薄膜’其係 具有相位差薄膜的功能。 4. 如申請專利範圍第1項之光學薄膜，其係長度方向 的長度爲5 0m以上的長薄膜。 5. —種偏光板，其特徵爲：至少一面上具有如申請專 利範圍第3項之光學薄膜。 6· —種液晶顯示器，其特徵爲：具有如申請專利範圍 第1項之光學薄膜或如申請專利範圍第5項之偏光板。 7 · —種光學薄膜的製造方法，其係製造如申請專利範 圍第1項之光學薄膜的方法，其特徵爲：具有將環狀烯烴 系樹脂使用齒輪泵供給擠出機，在擠出機出口之極大壓力 與平均壓力的差爲平均壓力的〇 · 2 %以下的條件下，藉由 熔融擠出法使其成形爲薄膜狀的步驟。 8 · —種光學薄膜的製造方法，其係製造如申請專利範 -37-(In the formula (1), R1 to R4 are a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 30 carbon atoms or other monovalent organic groups, which may be the same or different; and any two of R1 to R4 may mutually Bonding to form a single or polycyclic structure; m is 0 or a positive integer, p is 0 or a positive integer). 3. An optical film as claimed in claim 1 or 2 which has the function of a retardation film. 4. The optical film of claim 1 which is a long film having a length in the longitudinal direction of 50 m or more. A polarizing plate characterized by having an optical film as in item 3 of the patent application on at least one side. A liquid crystal display characterized by having the optical film of claim 1 or the polarizing plate of claim 5 of the patent application. A method for producing an optical film, which is a method for producing an optical film according to the first aspect of the invention, characterized in that the cyclic olefin resin is supplied to an extruder using a gear pump at an exit of the extruder The step of forming the film into a film shape by a melt extrusion method under the condition that the difference between the maximum pressure and the average pressure is 〇·2% or less of the average pressure. 8 · A method for manufacturing an optical film, which is manufactured as in Patent Application No. -37-

Claims (1)

200808880 (1) 十、申請專利範圍 1. 一種光學薄膜，係由環狀烯烴系樹脂所構成，在長 度方向上有週期性的厚度變動之薄膜，其特徵爲：滿足下 述式（A ) 、（ B )以及（c )所示的全部條件， P-V<1 …（A )； W>3 …( Β)； D<30 …（ c )；200808880 (1) X. Patent application scope 1. An optical film comprising a cyclic olefin resin and having a periodic thickness variation in the longitudinal direction, which is characterized by satisfying the following formula (A), (B) and (c) all the conditions, P-V <1 ... (A ); W > 3 ... ( Β); D < 30 ... ( c ); (式（A)中，P表示厚度變動中厚度的極大値（μπι)， V表示厚度變動中厚度的極小値（μπι)， 式（Β )中，W爲長度方向上極大厚度2點間的間 隔，在該2點的Ρ値比存在於該2點間之V的最小値大 〇·1(μπι)以上的情況下被測定作爲最短的間隔，表示長 度方向的週期間隔（cm)， 式（C)中，D表示薄膜厚度變化的斜率（ρρηι)之最 大値的絕對値）。 2·如申請專利範圍第1項之光學薄膜，其中環狀^烴 系樹脂係由下述式（1 )所表示的至少1種化合物聚g $ 共聚合而得之樹脂； -36- 200808880 (3) 圍第1項之光學薄膜的方法，其特徵爲：具有將環狀嫌烴 系樹脂成形爲薄膜狀以滾輪捲取的步驟’其中正常運轉時 滾輪的捲取速度的極大値或極小値，與平均捲取速度的差 之絕對値爲平均捲取速度的0.1%以下° 9.如申請專利範圍第8項之光學薄膜的製造方法，其 ’ 中使用表面爲陶瓷製，滾輪的表面粗糙度Rs的極大値 R m a X ( μ m )滿足R m a X S 0.2的範圍內之捲取浪輪。(In the formula (A), P represents the maximum thickness μ (μπι) of the thickness variation, V represents the minimum thickness μ (μπι) in the thickness variation, and in the formula (Β), W is the maximum thickness between the two points in the longitudinal direction. In the case where the ratio of the two points is less than the minimum 値·1 (μπι) of V between the two points, the interval is measured as the shortest interval, and the period interval (cm) in the longitudinal direction is expressed. In (C), D represents the absolute 値 of the maximum 値 of the slope of the film thickness change (ρρηι). 2. The optical film according to claim 1, wherein the cyclic hydrocarbon resin is a resin obtained by copolymerizing at least one compound represented by the following formula (1): -36- 200808880 ( 3) A method of optical film according to item 1, characterized in that it has a step of forming a ring-shaped smear-based resin into a film shape and winding it with a roller, wherein the winding speed of the roller during normal operation is extremely small or extremely small. The absolute difference from the average take-up speed is less than 0.1% of the average take-up speed. 9. The method for producing an optical film according to claim 8 of the patent application, wherein the surface used is made of ceramic, and the surface of the roller is rough. The maximum 値R ma X ( μ m ) of the degree Rs satisfies the winding wheel in the range of R ma XS 0.2. -38 --38 -
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