TW201239420A - Optical film and process for production thereof - Google Patents

Abstract

Provided is an optical film which has a relatively low haze value and is prevented from the occurrence of blocking satisfactorily. The optical film is characterized in that the center line average roughness (Ra) (mm) and the concave-convex average distance (Sm) (mm) of one surface of the optical film fulfill the following formula: Ra = 3.125PSm3/(EI) [wherein P represents a load (N) which is generated by a tensile force generated during the winding of the film, is applied to a space between adjacent convex parts present on the surface of the film, and is a value expressed by the formula: P = (F/x)Sm; x represents the width (mm) of the film during the winding of the film; F represents a tensile force (N) of the film generated during the winding of the film; E represents the elastic modulus (MPa) of the film; I represents the second moment of area (mm4) of the film which is represented by formula (3) and is a value expressed by the formula: I = (Smt3)/12; and t represents the thickness (mm) of the film], and is also characterized in that the optical film contains a resin and additionally contains microparticles in an amount of 0.2 wt% or less relative to the amount of the resin component.

Description

201239420 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to an optical film and a method of manufacturing the same. [Prior Art] In recent years, as the size of the display has increased, it has been expected to be wide-ranging and elongated for the mass-produced optical film. The optical film is taken up after being formed to form a film roll. Due to the widening and lengthening of the optical film, the problem of agglomeration occurs during storage and transportation of the film roll. In detail, there is a problem that the film adheres to each other to deform the film, or the impurities are mixed. A convex failure of convex deformation between the films. Attachment faults occur more frequently in the center of the width direction, and convex faults are more likely to occur at both ends in the width direction. When such agglomeration occurs, since the defective portion remains as an indentation at the time of use, it cannot be used as an optical film. In particular, when the width of the film having a width of 1.3 m or more is obtained, the effect of the embossing provided on both sides becomes small, and particularly in the center portion, the attachment failure is remarkably caused. The roll film forms an air layer between the film and the film by embossing on both sides to prevent the films from coming into contact with each other and preventing agglomeration. However, the film expands or contracts due to changes in temperature and humidity during storage and transportation, or the air layer is narrowed over time to bring the films into contact with each other. At this time, when the coefficient of friction inside the film sheet is large, stress concentrates on the contact portion ′ to cause agglomeration of the attached or convex failure. Therefore, in order to prevent agglomeration, the coefficient of friction inside the film sheet must be lowered. In order to reduce the coefficient of friction, it is known that a microparticle is contained as a material of roughness -5 - 201239420 to form irregularities on the surface of the film (Patent Document 1). However, whether a large particle size or a small particle size is used as a rough material causes an increase in the haze of the optical film, which causes a new problem of impairing the image quality of the display. Therefore, there has been disclosed a technique of controlling the surface roughness Ra of an optical film to a predetermined range by a surface shape transfer roller (Patent Document 2). However, such techniques are also insufficient to prevent agglomeration. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Laid-Open Patent Publication No. 2004-42653 [Patent Document 2] JP-A-2006-240228 SUMMARY OF THE INVENTION It is an object of the present invention to provide a relatively simple The small haze can also sufficiently prevent the agglomerated optical film and the method of manufacturing the same. The present invention relates to an optical film characterized in that the center line average roughness Ra (mm) of the surface of one surface and the average interval Sm (mm) of the unevenness satisfy the formula (1), and contain a resin, the particles relative to the resin The content of the component is 0.2% by weight or less;

Ra^3.125xPxSm3/(ExI) (1) [In the formula (1), P is a load (N) applied between adjacent convex portions of the film surface by the tension at the time of film winding, and is expressed by the formula (2). ) indicates that E is the modulus of elasticity (MPa) of the film, and I is the second moment of the section of the film represented by the formula (3) (mm4 )]; 201239420 P = (F/x)xSm (2) (Formula (2) Medium 'x is the film width (mm) when the film is taken up, F is the film tension (N) when the film is taken up; I = (Smxt3)xl〇'3/12 (3) (in the formula (3) t is the film thickness (mm) of the film. Further, the present invention relates to a method for producing an optical film, which comprises the step of forming a concavity and convexity on a surface of a polymer film having a content of irregularities of 0.2% by weight or less with respect to a resin component, so as to have a square surface. The center line average roughness Ra (mm) of the surface and the uneven interval Sm (mm) satisfy the formula (1);

Ra^ 3. 125 xPxSm3/(ExI) (1) [In the formula (1), P is a load (N) applied between adjacent convex portions of the film surface by the tension at the time of film winding, and (2) indicates that E is the modulus of elasticity (MPa) of the film, and 1 is the second moment of the section (mm4) of the film represented by the formula (3); P = (F/x)xSm (2) (Formula (2) Where x is the film width (mm) when the film is taken up, and F is the film tension (N) when the film is taken up; I = (Smxt3) x 10'3/12 (3) (in equation (3) , t is the film thickness (mm) of the film). According to the optical film of the present invention, even if it has a relatively small haze, it is possible to sufficiently prevent agglomeration during storage and transportation of the film roll. [Embodiment] (Optical film) The optical film of the present invention has an optical film of the formula (1) in which the center line average roughness Ra (mm) of the surface of one surface and the average interval Sm (mm) of the unevenness are satisfied.

Ra^ 3. 125 x PxSm3/(ExI) (1) The optical film of the present invention is not particularly limited in this embodiment. For example, the optical film may be a film roll having a plurality of layers wound around the core. In the form of a film sheet which is rolled up from the optical film roll and cut into a predetermined size for use as a mounting member of the liquid crystal display device. In the formula (1), Ra is the center line average roughness (mm) of the surface of the film. Ra is the average enthalpy of enthalpy measured by any of the 1 point in New View 5010 (manufactured by ZYGO Corporation). Ra is expressed by the unit of "mm" in the formula (1), and is usually 0.4 to 70 nm, preferably 0.5 to 50 nm when converted to "nmj." Ra of the one surface of the optical film can be formed by a casting roll described later. The Ra of the surface or/and the transfer rate of the mold roll are controlled. For example, when the Ra of the surface of the mold roll is increased and/or the transfer rate is increased, the Ra of the one surface is increased. When Ra is lowered on the surface of the mold roll And/or the transfer rate, the Ra of the one surface is lowered. The transfer rate of the mold roll can be adjusted by the transport tension of the film and the contact time with the mold roll, etc. In the formula (1), Sm is The average pitch of the concavities and convexities on the surface of the film (mm). The Sm is the average enthalpy of the enthalpy measured by any of the 1 point in New View 5010 (manufactured by ZYGO Co., Ltd.). Sm is "mm" -8 in the formula (1). - 201239420 The unit indicates that when converted to "μηι", it is usually 1~12μιη', preferably 1~5μπι. The Sm of the one surface of the optical film can be controlled by adjusting the S m of the surface of the casting roll to be described later. For example, when Sm of the surface of the mold roll is increased, the Sm of the one side surface increases. When the Sm of the surface of the mold roll is lowered, the Sm of the one side surface is lowered. In the formula (1), P is a load (N) applied between adjacent convex portions of the film surface when the film is taken up, and is represented by the formula (2). P = (F/x)xSm (2) In the present specification, the film winding means that when the optical film is finally wound into a plurality of layers around the core in the continuous manufacturing process of the optical film, A film roll is produced by taking up. When the film is taken up, the film is usually taken up in a film transport direction length of 200 to 1 0000 m, preferably 2000 to 9000 m. The longer the length of the film, the more likely it is to cause agglomeration, but in the present invention, even a relatively long film length as described above can effectively prevent agglomeration. In the formula (2), X is the film width (mm) at the time of film winding. The film width is the length in the film width direction. The width direction is a direction parallel to the axial direction of the winding core used for film winding, in other words, a direction orthogonal to the conveying direction of the film at the time of continuous production of the film on the film surface. The larger the film width X, the more pronounced the agglomerates are formed. In the present invention, even if the film width is large, agglomeration can be effectively and sufficiently prevented. X is preferably from 1 3 00 to 4000 mm, and particularly preferably from 1,400 to 2,200 mm. In the formula (2), F is the film tension (N) at the time of film winding. The film tension is the maximum tension imparted to the film during winding. Film tension -9- 201239420, usually gradually decreases from the initial stage to the final stage during coiling. At this time, F is the initial film tension (N) at the time of film winding, and is usually 40 to 600 N, preferably 60, per 1000 mm width. -300N. In the formula (2), Sm is the same as the above, and is the average interval (m m ) of the unevenness on the surface of the film. In the formula (1), E is the modulus of elasticity (MPa) of the film. E is determined by the resin constituting the film. For example, when the resin is a cellulose resin, E is about 3 000 MPa. Further, for example, when the resin is a (meth) acrylate resin, E is about 3 lOOMPa. Further, for example, when the resin is composed of 50% by weight of a cellulose resin and 50% by weight of a (meth) acrylate resin, E is about 3050 MPa. Further, for example, when the resin is a cycloolefin resin, E is about 2,400 MPa. I is the second moment of the section of the film (mm4), and is represented by the formula (3). I = (Smxt3)x 1 0*3/1 2 (3) In the formula (3), Sm is the same as defined in the formula (1). In the formula (3), t is a film thickness of "mm" unit, and when converted to "μηι", it is usually 1 to ΙΟΟμηι, preferably 2 〇 to 80 μm. Formula (1) 'When the deflection amount of the film 5 (nm) is represented by the formula (xl) [in the formula (xl), P, Sm, E and I are the same as those in the above formula (1)] δ = Ρ X Sm3/(4 8 XEXI) (xl) means that Rag 150 χ δ. That is, when the film is wound by the tension applied to form a film roll, as shown in Fig. 1, the adjacent convex portions of the film surface -10- 201239420 are subjected to a load by tension to cause scratching. This means that 値 of 150 times the deflection amount δ of the film is equal to or less than the center line flatness Ra. When the enthalpy of 150 χ is Ra or less, the film 挠 which is deflected by the P can be sufficiently prevented from coming into contact with the film f2 immediately below, so that agglomeration is prevented. When the enthalpy of 150 χ δ is larger than Ra, even if the film entanglement due to the deflection does not come into contact with the film f2 immediately below, the shrinkage of the film during storage or transportation or the contact of the air between the films is prevented from being sufficiently prevented. Piece. In the formula (X1), as shown in Fig. 2, the formula (yl) is based on the deflection amount δ' of the beam structure of the structural mechanical member, δ' = (Ρ'χί3) / (48χΕ'χΓ) (yl [In the formula (yl), the deflection of the δ old beam (mm); p• is the load of the beam (n); L is the distance between the pillars of the support beam (mm). The bending elastic modulus of the material constituting the beam (MPa) Γ is the second moment of the beam member (mm4), and Γ is represented by b't'3/12. b· is the width of the beam ’ t' is the thickness of the beam (m m )], and the result is carefully explored. In the present embodiment, the above formula (1) is preferably a formula (zl), particularly preferably a formula (z2), 1.0^Ra-3.125xPxSm3/(ExI)^25.0 (zl) 1.2 in order to prevent agglomeration. ^Ra-3.125xPxSm3/(ExI)^5.0 (z2) The optical film of the present invention has substantially fine irregularities on the one surface. The size of the concavities and convexities is not particularly limited as long as it is a size in which the Ra and the predetermined range of the foot (the range satisfying the above formula (1) are satisfied). For example, the shape of the concavities and convexities may be curved in the width direction. Both of them are rough and the load can be fully weighted by p, but because of each other, the cross section (mm) applied to ;E' is sufficient. The strip-shaped irregularities repeatedly formed in parallel with each other in the transport direction or the oblique direction orthogonal to the width direction of the width -11 - 201239420 degrees, or the dot-shaped irregularities in which the convex portions are regularly or irregularly formed. The cross-sectional shape of the portion and the recess is generally independently a substantially semi-circular shape. The cross-sectional shape may be such that the other surface of the optical film of the present invention is perpendicular to the cross section or the vertical cross section with respect to the film transport direction, as long as the center line average roughness Ra of the surface and the unevenness are averaged. Although it is not particularly limited, it is preferably smooth, and the center line average roughness R a of the other surface is usually 5 nm or less in the surface of the other surface, and particularly, the average unevenness of the unevenness of the other surface is The Sm is particularly preferably 1.5 to 5 μm. The other surface of the optical film can be achieved by adjusting the other contact in the unevenness forming step described later or by adjusting the Ra and Sm of the surface of the back roll when the roll is used in the uneven forming step. . The optical film of the present invention may have any form, and the optical film may be wound into a plurality of layers around the core, or may be rolled out from the optical film, and the liquid crystal display may be formed according to the size. The zero-loaded form of the device or the like. When the optical film of the present invention has a face shape of a film sheet which is comprehensive and satisfies the above formula, and preferably is smooth as described above. The upward connection is a convex shape in the shape of a cone, which is a triangular shape or a width direction. The surface interval Sm of the above one is satisfied. In detail, it is preferably less than the former 0.011 to 3 nm, preferably 1 to 5 μm, and the Ra and Sm* faces are not disposed opposite to any of the rolls, as may be used in the form of the roll of the film roll. When the film is in the form of a film, as long as the other side of the film is as in the form of a film roll, the film of the present invention covers the entire form and satisfies the above formula, and preferably the other side. The optical film roll of the present invention may have a knurled portion at both ends in the width direction, and the region inside the groove portion of the one surface may cover the entire region and satisfy the above formula. Further, the area on the inner side of the embossed portion on the other side may be as described above. In the optical film of the present invention, if one surface satisfies the surface of one of the above formulas, Ra may be substantially uniform in the width direction, or may have a gradient which decreases or increases from the central portion toward both end portions in the direction. It is reduced or increased from the central portion toward both end portions, and the above-described formula is sufficient for each of the at least the central portion and the both end portions, and the term "Ra" in the width direction substantially means any in the width direction. When Ra is measured at 10 points, the difference of the maximum small enthalpy is less than 1. Onm, preferably 0.5 nm or less. The gradient in which the Ra increases from the central portion toward the both end portions in the width direction means that the Ra of the central portion is larger than the central portion of the larger end portion of the Ra portion at the both end portions, and at this time, the central portion is The Ra of the middle portion between the two is as long as it is located between the Ra of the central portion and the end. When the Ra of the center portion is larger than the both end portions, the step effectively prevents the attachment failure frequently occurring in the center portion. When the Ra is larger than the central portion, the convex failure which occurs frequently in two cases can be further effectively prevented. Ra varies in the width direction. On the one hand, if the film width is smoother than the roll, the width can be one when the Ra gradient is the same, the system is the most reduced or the two are different. The Ra can be extended to the end of the end portion to be -13 - 201239420. The continuity or the gradation is preferable. From the viewpoint of the uneven appearance of the film and the haze, it is preferably continuous. For example, when Ra of the center portion is larger than both end portions, the rate of change of Ra from the central portion toward the both end portions in the width direction is preferably -2.5 to -40% from the viewpoint of preventing the attachment failure. The rate of change means that when the center line surface roughness of the center portion is Rac (mm) and the center line surface roughness of the end portion is Rae (mm), the rate of change Cr (%) = {(Rae) -Rac)/RaC}xlOO represents the surface roughness gradient. The rate of change cri from the central portion toward the one end portion and the rate of change Cr2 from the central portion toward the other end portion may be independently located within the above range. Preferably, the absolute enthalpy of the difference between Ch and Cr2 is 1% or less, and particularly preferably 0.5% or less. In the present specification, the central portion in the width direction means a region (the central region having a length of l〇〇mm in the width direction) in a range of 50 mm from the center (line) in the width direction of the film. The Rac at the center is used to measure the average 値 of any 10 points Ra in this area. The end portion in the width direction means a region in the range of 10 mm from the end face of the film in the width direction of the film. In particular, when the optical film of the present invention has a knurled portion at both ends in the film width direction, the term "end portion" means that the distance from the center portion side boundary line of the embossed portion to the center portion side is 1 mm. The area within the scope. The Rae at the end is the average 値 of Ra measured at any 1 point in this area. Further, for example, when the Ra of the both end portions is larger than the central portion, the rate of change of Ra from the central portion toward the both end portions in the width direction prevents the convex failure from the viewpoint of -14,394,420, which is preferably 2.5 to 75%. The rate of change is expressed by the same rate of change as above. The rate of change Cn from the central portion toward the one end portion and the rate of change Cr2 from the central portion toward the other end portion may be independently within the above range, and it is preferable that the absolute 値 of the difference between Cn and Cr2 is 1% or less. It is preferably 0.5% or less. The optical film of the present invention contains at least a resin, and may further contain an additive such as a plasticizer, an ultraviolet absorber, an antioxidant, a roughening agent, a retardation enhancer or the like. In the present invention, the content of the roughening agent is, in particular, 0.2% by weight or less, preferably 0.1% by weight or less, and most preferably 0% by weight based on the resin constituting the optical film. This is because when the content of the roughening agent is too large, the haze of the film rises. In the present invention, the content of the roughening agent can be effectively prevented from agglomerating at least as described above. Roughizers use microparticles. By microparticles, it is meant that the average particle size in the film or on the surface thereof is less than ημηι, especially particles of 5 nm or more and less than Ιμηι. The fine particles may exist as primary particles in the film, or a plurality of particles may aggregate and form secondary particles (secondary aggregates) and have a refractive index of the particles, when the refractive index of the resin component used in the film is close to The haze rises less, so it is better. The refractive index of the cellulose ester film is about 1.4 7 to 1.49, so that the refractive index of the fine particles is preferably from 1.46 to 1.50, more preferably from 1.47 to 1.49. The average particle diameter of the fine particles is determined by measuring the particle diameter of the primary particles when the particles are present as primary particles, and measuring the particle diameter of the secondary particles when the particles are secondary particles, and averaging the particle diameters. Ask for it. The average particle diameter is, for example, observed by an electron microscope, and is determined from the particle diameter of 100 -15 - 201239420 particles. Here, each particle diameter is represented by a diameter when a projected area is assumed to be a circle. Alternatively, the fine particles were dissolved in a solvent, and measured by a dynamic light scattering particle size measuring device Zetasizer 1 000HS (manufactured by Malvern). The kind of the fine particles may be an inorganic compound or an organic compound. Examples of the inorganic compound include a compound containing a ruthenium atom among ruthenium dioxide, titanium oxide, aluminum oxide, chromium oxide, tin oxide, etc., and particularly preferably ruthenium dioxide. Examples of the cerium oxide microparticles include AEROSIL 200, 200V, 300, R972, R972V, R974, R202, R812, R805, 0X50, and TT600 manufactured by Aerosil Co., Ltd. Examples of the organic compound include an acrylic resin, a polyoxyalkylene resin, a fluorinated resin, and a urethane resin. The roughening agent can be an elastomeric particle. The elastomer fine particles are polymer fine particles having a core-shell structure, and are provided on the surface of the rubber-like polymer fine particles (core (core) portion) and have a hard shell layer containing a methyl methacrylate polymer or the like. particle. The rubbery polymer constituting the core portion of the elastomer fine particles is preferably an alkyl acrylate rubber. The method for producing the core portion is known by a method of seed crystal emulsion polymerization. The methyl methacrylate-based polymer constituting the shell layer means a homopolymer of methyl methacrylate and a copolymer containing the methyl methacrylate and a monomer copolymerizable therewith. The shell layer can be produced by emulsification polymerization of a predetermined monomer in the presence of a core latex. The resin component constituting the optical film of the present invention can be a generally known polymer used in the field of conventional optical films, and specifically,

-16- 201239420 A cellulose resin, a (meth)acrylic resin, a cycloolefin resin, and the like are listed. It is preferred to contain a cellulose resin, a (meth)acrylic resin, a cyclic olefin resin or a mixture thereof. The cellulose resin is preferably a lower fatty acid ester of cellulose. The lower fatty acid in the lower fatty acid ester of cellulose means a fatty acid having 6 or less carbon atoms. Specific examples of the cellulose resin, for example, cellulose acetate, cellulose propionate, cellulose butyrate, or the like, or Japanese Patent Laid-Open No. 0-45 804, Japanese Patent Application Laid-Open No. 08-23 1 76 1 A mixed fatty acid ester such as cellulose acetate propionate or cellulose acetate butyrate described in U.S. Patent No. 2, '3, 9,05, and the like. In the above description, the lower fatty acid ester of cellulose which can be particularly preferably used is cellulose triacetate or cellulose acetate propionate. These cellulose esters can be used singly or in combination. The cellulose resin preferably has a degree of substitution of an ethyl ketone group of X and a degree of substitution of a propyl fluorenyl group or a butyl group with Y, and preferably a cellulose resin of the following formulas (I) and (II). Formula (I) 2.6 ^X + Y ^3.0 Formula (II) 0SXS2.5 is preferably 1.9SXS2.5, 0.1SYS0.9. A portion that is not substituted with a thiol group is usually present as a hydroxyl group. These can be synthesized by a generally known method. The method for measuring the degree of substitution of the thiol group can be determined according to ASTM-D817-96. The molecular weight of the cellulose resin is preferably from 60000 to 300,000, more preferably from 70,000 to 200,000, in terms of number average molecular weight (??). The cellulose resin used in the present invention preferably has a weight average molecular weight (Mw) / quantity of -17 - 201239420 average molecular weight (?η) of 4.0 or less, more preferably 1.4 to 2 · 3. In the present specification, the average molecular weight and molecular weight distribution of the resin can be measured by high-speed liquid chromatography, so that the number average molecular weight (?n) and the weight average molecular weight (Mw) can be calculated and the ratio can be calculated. The measurement conditions are as follows. Solvent: Dichloromethane column: Shodex K806, K805, K803 G (to be used by three joints made by Showa Denko Co., Ltd.) Column temperature: 25 ° C Sample concentration: 0.1% by mass. Detector: RI Model 5 04 (manufactured by GL Science Co., Ltd.) Pump: L6 000 (manufactured by Hitachi, Ltd.) Flow rate: 1.0 ml/min Calibration curve: Standard polystyrene STK standard polystyrene (manufactured by Tosoh Co., Ltd.) Mw=l Calibration curve for 13 samples up to ,000,000~500. The 13 samples are preferably used almost equally. As the cellulose resin, cellulose ester synthesized by using lint paper, wood pulp, kenaf or the like as a raw material can be used singly or in combination. The cellulose ester synthesized from cotton velvet paper (hereinafter sometimes referred to simply as velvet paper) is used singly or in combination. The (meth)acrylic resin contains an acrylic resin and a methacrylic resin. The (meth)acrylic resin is not particularly limited, and is preferably composed of 50 to 99% by mass of methyl methacrylate unit and 1 to 50% by mass of other monomer units copolymerizable therewith. -18- 201239420 Other monomers copolymerizable with methyl methacrylate include alkyl methacrylates having a carbon number of 2 to 18 and alkyl acrylates having a carbon number of 1 to 18 , α,β-unsaturated acid such as acrylic acid or methacrylic acid; unsaturated acid-containing divalent carboxylic acid such as maleic acid, fumaric acid or methylene succinic acid; styrene, α-A An aromatic vinyl compound such as styrene; an α,β-unsaturated nitrile such as acrylonitrile or methacrylonitrile; maleic anhydride, maleimide, fluorene-substituted maleimide, glutaric anhydride Alternatively, these may be used alone or in combination of two or more kinds of monomers. Among these, methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, n-butyl acrylate, and acrylic acid 2- are preferably used from the viewpoint of heat decomposition resistance and fluidity of the copolymer. Ethyl hexyl ester or the like, particularly preferably methyl acrylate or n-butyl acrylate. The (meth)acrylic resin preferably has a weight average molecular weight (Mw) of 80,000 or more, particularly preferably in the range of 80,000 to 1,000,000, particularly preferably in the range of 100,000 to 600,000, and most preferably in the range of 150,000 to 400,000. The method for producing the acrylic resin is not particularly limited, and any of generally known methods such as suspension polymerization, emulsion polymerization, bulk polymerization, or solution polymerization can be used. Here, as the polymerization initiator, a general peroxide system or an azo group can be used, and a reducing oxidation system can also be used. The polymerization temperature, in suspension polymerization or emulsion polymerization, can be carried out in 30 to 1 Torr, in bulk polymerization or solution polymerization, and can be carried out at 80 to 160 °C. In order to control the reduction viscosity of the obtained copolymer, it is also possible to carry out polymerization using an alkyl mercaptan or the like as a chain shifting agent. -19- 201239420 (Meth)acrylic resin can also be used commercially. For example, Delpet 60N, 80N (made by Asahi Kasei Chemicals Co., Ltd.), Dianal BR52, BR80, BR83, BR85, BR88 (manufactured by Mitsubishi Rayon Co., Ltd.), KT75 (manufactured by Electric Chemical Industry Co., Ltd.), and the like can be given. Two or more types of acrylic resins can be used. The cycloolefin resin is a polymerizable resin having an alicyclic structure. A preferred cycloolefin resin is a resin which polymerizes or copolymerizes a cyclic olefin. Examples of the cyclic olefin include norbornene, dicyclopentadiene, tetracyclododecene, ethyltetracyclododecene, ethylene tetracyclododecene, and tetracyclo [7.4.0.110, 13.02, 7 Unsaturated hydrocarbons and derivatives thereof having a polycyclic structure such as thirteen-2,4,6,11-tetraene; cyclobutene, cyclopentene, cyclohexene, 3,4-dimethylcyclopentane Alkene, 3-methylcyclohexene, 2-(2-methylbutyl)-1-cyclohexene, cyclooctene, 3&, 5,6,73-tetrahydro-4,7-methanol-1 An unsaturated hydrocarbon having a monocyclic structure such as hydrazine, cycloheptene, cyclopentadiene or cyclohexadiene, and a derivative thereof. These cyclic olefins may have a polar group as a substituent. The polar group may, for example, be a hydroxyl group, a carboxyl group, an alkoxy group, an epoxy group, a glycidyl group, an oxycarbonyl group, a carbonyl group, an amine group, an ester group or a carboxylic anhydride group, and particularly preferably an ester group, a carboxyl group or a carboxylic anhydride group. A preferred cycloolefin resin is an addition copolymerizable monomer other than a cyclic olefin. The monomer which can be subjected to addition copolymerization includes ethylene or an α-olefin such as ethylene, propylene, 1-butene or 1-pentene; 1,4-hexadiene and 4-methyl-1,4; - a diene such as hexadiene, 5-methyl-1,4-hexadiene or 1,7-octadiene. The cycloolefin resin can be obtained by addition polymerization or metathesis ring-opening polymerization. The polymerization is carried out in the presence of a catalyst. The catalyst for addition polymerization a -20- 201239420 is, for example, a polymerization catalyst composed of a vanadium compound and an organoaluminum compound. Examples of the catalyst for ring-opening polymerization include a halide, a nitrate or an acetoacetone compound of a metal such as ruthenium, rhodium, palladium, ruthenium, osmium or uranium, and a polymerization catalyst composed of a reducing agent; A polymerization catalyst composed of a metal halide or an acetonitrile acetone compound such as a paper, a paper, a pin, a tungsten or a molybdenum, and an organoaluminum compound. The polymerization temperature, pressure, and the like are not particularly limited, and polymerization is usually carried out at a polymerization temperature of -50 ° C to 10 ° C and a polymerization pressure of 〇 4 0 0 N/cm 2 . The cycloolefin resin, after subjecting the cyclic olefin to polymerization or copolymerization, is preferably subjected to a hydrogenation reaction to change an unsaturated bond in the molecule to a saturated bond. The hydrogenation reaction can be carried out by blowing hydrogen gas in the presence of a generally known hydrogenation catalyst. The hydrogenation catalyst may, for example, be cobalt acetate/triethylaluminum, acetonitrile nickel acetate/triisobutylaluminum, dichlorotitanium dichloride/n-butyllithium, zirconocene/secondary butyllithium, tetrabutoxy a homogeneous catalyst composed of a combination of a transition metal compound/alkyl metal compound like a titanate/dimethylmagnesium; a heterogeneous catalyst such as nickel, palladium or lead: nickel/cerium oxide, nickel / 矽 矽 algae, nickel / alumina, palladium / carbon, palladium / cerium oxide, palladium / diatomaceous earth, palladium / alumina like a non-uniform solid support catalyst supported by a metal catalyst Wait. The cycloolefin resin may also be exemplified by the following norbornene-based resins. The decene-based resin is preferably a decene-based skeleton as a repeating unit, and a specific example thereof is disclosed in JP-A-62-252406, JP-A-62-252407, and JP-A-2002- Japanese Laid-Open Patent Publication No. SHO-63-145324, Japanese Laid-Open Patent Publication No. SHO-63-264626, Japanese Laid-Open Patent Publication No. Hei No. Hei No. Hei No. Hei No. Hei. Bulletin No. 5-2108, 曰太胜 M术 c W ΰ 特 特 5 5 - - 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 - - - - - - - - - - - - - - - - - Bulletin, Japan Special Kaiping MW

Japanese Unexamined Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Japanese Patent Laid-Open Publication No. 2003-14901, Japanese Laid-Open Patent Publication No. 2003-161-832, Japanese Patent Laid-Open Publication No. Hei. No. Hei. Japanese Laid-Open Patent Publication No. 2003-2681, JP-A-2003-2681, JP-A-2004-133209, JP-A-2004-309979, JP-A-2005-121823, and JP-A-2005 Japanese Laid-Open Patent Publication No. 2006-172309, Japanese Laid-Open Patent Publication No. 2006-178191, Japanese Laid-Open Patent Publication No. Hei. No. 2006-215333, Japanese Laid-Open Patent Publication No. 2006-268065, No. 2006-299 No. The person who is described in the Gazette or the like is not limited thereto. Further, these may be used alone or in combination of two or more. Specifically, it is preferable to use Zeonex manufactured by Zeon Co., Ltd., Zeonor, Arton manufactured by JSR Co., Ltd., Apel (APL8008T, APL6509T, APL6013T, APL5014DP, APL6015T) manufactured by Mitsui Chemicals, Inc., and the like. The molecular weight of the cycloolefin resin can be appropriately selected depending on the purpose of use, and the polyisoprene or polyphenylene is determined by gel permeation chromatography of a cyclohexane solution (a toluene solution when the polymer resin cannot be dissolved). The ethylene-based weight average molecular weight meter is usually located at 5,000 to 50,000 00', preferably at 201239420 8000 to 200000, and particularly preferably in the range of 10,000 to 10,000. The mechanical strength and formability can be highly balanced, so good. The plasticizer is not particularly limited, and examples thereof include a polyol ester-based, a glycolate-based plasticizer, a phthalate-based plasticizer, a lemon-based plasticizer, a fatty acid ester-based plasticizer, and a phosphate-based plasticizer. , polyacid ester plasticizer, polyester plasticizer, acrylic plasticizer, and the like. The plasticizer is a polyol ester-based plasticizer, a polyester-based plasticizer, or the like. The special plasticizer is a polyol ester-based plasticizer. Two or more kinds of plasticizers may be combined. In this case, at least one of them is preferably a polyol ester-based plasticizer. The polyol ester-based plasticizer is a plasticizer composed of an ester of a divalent or higher aliphatic polymonocarboxylic acid, and preferably has an aryl or naphthene ring in the molecule. It is preferably a 2 to 20 valent aliphatic polyol ester. The polyol constituting the polyol ester-based plasticizer is represented by the following general a). - (a) Rl-(〇H)na, wherein R! represents an η-valent organic group, and na represents a positive number of 2 or more and represents an alcoholic and/or phenolic hydroxyl group. Examples of preferred polyols include the following, but the present invention is not limited thereto. Ribool, arabitol, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1 diol, 1,3-propanediol, dipropylene glycol, tripropylene glycol, 1,2-butane 1, 3-butanediol, 1,4-butanediol, dibutylene glycol, 1,2,4-butanetriol, pentanediol, 1,6-hexanediol, pentanetriol, galactitol, mannose Sugar alcohol methylpentane-1,3,5-triol, pinacol, sorbitol, triethylpropane, trimethylolethane, xylitol, and the like. It is preferably a triethylene glycol-shaped plasticizer ester residue which is preferably used in the form of an alcohol and an aromatic ring (, OH such as Rabbi, 2-propanol, 1,5-' 3-hydroxymethyl, tetra-23- 201239420 Ethylene glycol, dipropylene glycol, tripropylene glycol, sorbitol, trimethylolpropane' xylitol. The monocarboxylic acid constituting the polyol ester-based plasticizer is not particularly limited, and generally known aliphatic monocarboxylic acid can be used. When an alicyclic monocarboxylic acid or an aromatic monocarboxylic acid is used, it is preferred from the viewpoint of improving moisture permeability and retention. Examples of the carboxylic acid are as follows, but the present invention is not limited thereto. The aliphatic monocarboxylic acid is preferably a fatty acid having a linear or side chain having 1 to 3 carbon atoms, more preferably a carbon number of 1. 〜20, particularly preferably 1 to 10. When cellulose resin is used as the resin component, compatibility with cellulose resin can be increased when acetic acid is contained, and therefore it is preferred to use acetic acid and other monocarboxylic acid in combination. Preferred aliphatic monocarboxylic acids include acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, heptanoic acid, and octane. Acid, citric acid, citric acid, 2-ethyl-hexanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, palmitic acid, heptadecanoic acid, octadecanoic acid, nineteen a saturated fatty acid such as acid, icosonic acid, behenic acid, tetracosic acid, hexamic acid, octadecanoic acid, octadecanoic acid, tridecanoic acid or tridecanoic acid; undecylenic acid, ten An unsaturated fatty acid such as oleic acid, sorbic acid, linoleic acid, linoleic acid or arachidonic acid. Preferred examples of the alicyclic monocarboxylic acid include cyclopentanecarboxylic acid and a ring. A hexane carboxylic acid, a cyclooctane carboxylic acid, or a derivative thereof. Preferred examples of the aromatic monocarboxylic acid include a benzoic acid such as benzoic acid or methylbenzoic acid. An alkoxy group such as an alkyl group, a methoxy group or an ethoxy group; an aromatic monocarboxylic acid having two or more benzene rings such as a biphenylcarboxylic acid, a naphthalenecarboxylic acid or a tetrahydronaphthalenecarboxylic acid; or These derivatives are particularly preferably benzoic acid. The carboxylic acid used in the polyol ester may be one type of -24 to 201239420 or a mixture of two or more. The OH group in the polyol may be a fully esterified person. , A part of the polyol ester is not particularly limited, and is preferably 300 to 1 500, more preferably 3 to 50 to 750. The glycolate plasticizer is not particularly limited, and an alkane is preferably used. The alkyl hydroxyacetate dicarboxylate. The alkyl hydroxyacetate alkyl phthalate may, for example, be methyl hydroxyacetate, ethyl hydroxyethyl phthalate or hydroxy propyl phthalate. Propyl acetate, butyl butyl hydroxyacetate, octyl octyl phthalate, ethyl hydroxyethyl dicarboxylate, methyl hydroxyacetate, hydroxyacetic acid Propyl ester, butyl hydroxyacetate, butyl phthalate, butyl phthalate, methyl hydroxyacetate, hydroxyethyl phthalate, hydroxy hydroxy phthalate Butyl butyl phthalate hydroxyacetate, methyl phthalic acid glycolic acid, ethyl phthalate octyl hydroxyacetate, hydroxyethyl octyl phthalate, octyl phthalic acid glycolic acid Ethyl ester and the like. a phthalate-based plasticizer, which may be exemplified by phthalic acid phthalate, dimethoxyethyl phthalate, dimethyl phthalate, dioctyl phthalate, and dibutyl phthalate. Ester, di-2-ethyl phthalate, dioctyl phthalate, dicyclohexyl phthalate, p-benzene dicyclohexyl ester, and the like. Examples of the citrate-based plasticizer include acetaminophen citrate, triethyl citrate, and tributyl citrate. The fatty acid ester-based plasticizer' may, for example, be octadecyl phthalate, methyl decyl phthalate or dibutyl sebacate. Part of the meridian group, xylene di-phenyl phenyl o-ethyl, butyl ester, octyl ester methyl ethyl dimethyl hexyl ester formic acid, linseed oil - 25 - 201239420 phosphate ester plasticizer, can be listed as phosphoric acid Phenyl ester, tricresyl phosphate, toluene diphenyl phosphate, octyl diphenyl phosphate, diphenyl biphenyl phosphate, trioctyl phosphate, tributyl phosphate, and the like. The polycarboxylic acid ester-based plasticizer is composed of an ester of a divalent or higher polycarboxylic acid and an alcohol. Examples of the polyvalent carboxylic acid constituting the polyvalent carboxylate plasticizer include an aliphatic polycarboxylic acid having a valence of 2 to 20, an aromatic polycarboxylic acid having a valence of 20 to 20, and an alicyclic polyvalent carboxylic acid having a valence of 20 to 20 valent. acid. The polycarboxylic acid is represented by the following general formula (b). - (b) R2(COOH)mb(OH)nb R2 is an organic group of (mb + nb ) valence, mb is a positive integer of 2 or more, nb is an integer of 0 or more, a COOH group is a carboxyl group, and an OH group is Alcoholic or phenolic hydroxyl. Examples of preferred polyvalent carboxylic acids include the following, but the present invention is not limited thereto. It is preferred to use a trivalent or higher aromatic polycarboxylic acid such as trimellitic acid, trimellitic acid or pyromic acid. a derivative thereof; succinic acid, adipic acid, azelaic acid, sebacic acid, oxalic acid, fumaric acid, maleic acid, tetrahydrophthalic acid-like aliphatic polycarboxylic acid; tartaric acid, hydroxypropyl Acid, malic acid, citric acid-like oxygen polycarboxylic acid, and the like. Especially in terms of improving the retention, it is preferred to use an oxygen polycarboxylic acid. The alcohol constituting the polyvalent carboxylate plasticizer is not particularly limited, and generally known alcohols and phenols can be used. For example, an aliphatic saturated alcohol or an aliphatic unsaturated alcohol having a linear or side chain having a carbon number of 1 to 32 can be preferably used. More preferably, the carbon number is 1 to 20, and particularly preferably 1 to 10. Preferably, an alicyclic alcohol or a derivative thereof such as cyclopentanol or cyclohexanol; an aromatic alcohol such as benzyl alcohol or cinnamyl alcohol; or a derivative thereof, -26-201239420, or the like can be used. The alcohol to be used in the polycarboxylic acid ester-based plasticizer which can be used in the present invention may be one type or two or more types. The molecular weight of the polycarboxylate-based plasticizer is not particularly limited, and is preferably in the range of 300 to 1,000 in molecular weight, more preferably in the range of 3 to 50. From the standpoint of improving retention, the larger one is better, and the smaller one is better in terms of moisture permeability and compatibility with cellulose ester. Examples of the particularly preferred polycarboxylic acid ester-based plasticizer are as follows, but the present invention is not limited thereto. For example, triethyl citrate, tributyl citrate, acetaminoethyl citrate (AT AC ), butyl tributyl citrate (ATBC), benzhydryl citrate tributyl citrate, citric acid Ethylenetriphenyl ester, tribenzyl citrate, dibutyl tartrate, dibutyl butyl tartrate, tributyl trimellitate, tetrabutyl pyromelliate, and the like. As the polyester-based plasticizer, a polyester-based plasticizer having an aromatic ring or a cycloalkane ring in the molecule can be used. A preferred polyester-based plasticizer, for example, an aromatic terminal ester-based plasticizer represented by the following general formula (c) can be used.

- (c) B-(GA)nc-GB wherein B represents an aromatic carboxylic acid residue, G represents an alkanediol residue having 2 to 12 carbon atoms or an aromatic diol residue having a carbon number of 6 to 12 The oxyalkylene glycol residue having a carbon number of 4 to 12, A represents an alkanedicarboxylic acid residue having 4 to 12 carbon atoms or an aromatic dicarboxylic acid residue having 6 to 12 carbon atoms, and nc represents an integer of 1 or more. An aromatic terminal polyester-based plasticizer, for example, in the general formula (c), is a benzene monocarboxylic acid residue represented by B and an alkanediol residue or an oxyalkylene glycol residue or a aryl group represented by G The alcohol residue and the alkanedicarboxylic acid residue or the aromatic dicarboxylic acid residue represented by A can be obtained by the same reaction as the usual -27-201239420 polyester-based plasticizer. A benzene monocarboxylic acid component of an aromatic terminal polyester plasticizer, for example, benzoic acid, p-terphenyl benzoic acid, o-methylbenzoic acid, m-methylbenzoic acid, p-methylbenzoic acid, dimethylbenzene Formic acid, ethyl benzoic acid, n-propyl benzoic acid, aminobenzoic acid, ethoxylated benzoic acid, and the like. These may be used alone or in combination of two or more. Aromatic terminal polyester-based plasticizer having an alkanediol component having 2 to 12 carbon atoms, such as ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, and 1,3-butylene Glycol, 1,2-propanediol, 2-methyl-1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 2,2-dimethyl-1,3-propanediol ( Neopentyl glycol), 2,2-diethyl-1,3-propanediol (3,3-dihydroxymethylpentane), 2-n-butyl-2-ethyl-1,3-propanediol (3 , 3-dimethylolbutane), 3-methyl-1,5-pentanediol, 1,6-hexanediol, 2,2,4-trimethyl-1,3·pentanediol, 2-ethyl-1,3-hexanediol, 2-methyl-1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,12-octadecane As the alcohol or the like, one type or a mixture of two or more types may be used. In particular, an alkanediol having a carbon number of 2 to 12 is particularly excellent in compatibility with a cellulose ester. The aryl diol component having 4 to 12 carbon atoms of the aromatic terminal polyester-based plasticizer may be, for example, a diol such as diethylene glycol, triethylene glycol, tetraethylene glycol 'dipropylene glycol or tripropylene glycol. Or a mixture of two or more. The alkanedicarboxylic acid component having 4 to 12 carbon atoms of the aromatic terminal polyester-based plasticizer, for example, succinic acid, maleic acid, fumaric acid, glutaric acid, adipic acid, sebacic acid, and bismuth An acid, a dodecanedicarboxylic acid, etc. may be used, and one type or a mixture of two or more types may be used. The aromatic dicarboxylic acid component having 6 to 12 carbon atoms is -28-201239420 phthalic acid, terephthalic acid, isophthalic acid, 1,5 naphthalene dicarboxylic acid, 1,4 naphthalene dicarboxylic acid, and the like. The polyester-based plasticizer preferably has a number average molecular weight of from 300 to 1,500, particularly preferably from 400 to 1,000. Further, the acid strontium is 0.5 mgKOH/g or less, and the oxindole is 25 mgKOH/g or less. More preferably, the acid strontium is 0.3 mgKOH/g or less, and the cerium is 15 mgKOH/g or less. The content of the plasticizer is preferably from 3 to 20% by mass based on the total of the components constituting the optical film. The plasticizer may be used in combination of two or more kinds. In this case, the total content of these may be within the above range. The ultraviolet absorber is intended to absorb the ultraviolet rays of 400 nm or less to improve the durability, and particularly the transmittance at a wavelength of 37 〇 nm, preferably 10% or less, particularly preferably 5% or less, more preferably 2%. the following. The ultraviolet absorber is not particularly limited, and examples thereof include an oxydiphenyl ketone compound, a benzotriazole compound, a salicylate compound, a diphenyl ketone compound, a cyanoacrylate compound, and a triazine compound. , a nickel complex compound, an inorganic powder, and the like. For example, 5-chloro-2-(3,5-di(secondary butyl)-2-hydroxyphenyl)-2H-benzotriazole, (2-2 H-benzotriazol-2-yl) -6-(linear and side chain dodecyl)-4-methylphenol, 2-hydroxy-4-benzyloxydiphenyl ketone, 2,4-benzyloxydiphenyl ketone, etc. Ding Wei 111^111〇9, Tinuvin 171, Tinuvin 234, Tinuvin 326, Tinuvin 327,

Tinuvin, such as Tinuvin 328, which is commercially available from Ciba Specialty Chemicals, is preferably used. A UV absorber which can be preferably used is a benzotriazole-based ultraviolet absorber, a diphenylketone-based ultraviolet absorber, a triazine-based ultraviolet absorber -29-201239420 'Specially a benzotriazole-based ultraviolet absorber Agent, diphenyl ketone UV absorber. Further, a discotic compound having a compound having a 1,3,5-triazine ring or the like can be preferably used as the ultraviolet absorber. As the ultraviolet absorber, a polymer ultraviolet absorber can be preferably used. The polymer type ultraviolet absorber described in JP-A-6-140438 can be used. The content of the ultraviolet absorber is 0.5 to 10% by weight, particularly preferably 6% to 4% by weight, based on the resin constituting the optical film. The ultraviolet absorber may be used in combination of two or more kinds. In this case, the total content of these may be within the above range. Antioxidants are also known as anti-deterioration agents. The antioxidant can be preferably used especially when a cellulose resin is used as the resin component. The antioxidant is preferably a hindered phenol-based compound, and examples thereof include 2,6-di(tri-butyl)-p-cresol, pentaerythritol-tetra[3-(3,5-di (three-stage) Butyl)-4-hydroxyphenyl)propionate], triethylene glycol-bis[3-(3-tris-butyl-5-methyl-4-hydroxyphenyl)propionate], 1, 6.·hexanediol·bis[3-(3,5-di(tributyl)-4-hydroxyphenyl)propionate], 2,4·bis(n-octylsulfanyl)-6- ( 4-hydroxy-3,5-di(tri-butyl)anilino)-13,5-triazine' 2,2-sulfan-divinyl bis[3-(3,5-di(tri-butyl) 4-hydroxyphenyl)propionate], octadecyl-3-(3,5-di(tributyl)-4-hydroxyphenyl)propionate, hydrazine, hydrazine--hexamethylene double (3,5-di(tri-butyl)·4·trans-hydroxycincoinamide), 1,3,5-trimethyl-2,4,6·tris (3,5-di (three-stage) Butyl)-4.hydroxybenzyl)-benzene, tris-(3,5-di(tributyl)-4.hydroxyphenyl)-isophthalic acid vinegar, and the like. Particularly preferred is 2,6-di(tributyl)-p-methylhydrazine, neopentatetra-30-201239420 alcohol-tetrakis[3-(3,5-di(tri-butyl)-4-hydroxyphenyl) Propionate], triethylene glycol-bis[3-(3-tri-butyl-5-methyl-4-hydroxyphenyl)propionate]. In addition, it is also possible to use a metal inactive agent such as lanthanum, lanthanum 1-bis[3-(3,5-di(tri-butyl)-4-hydroxyphenyl)propene] oxime or the like. A phosphorus-based processing stabilizer such as (2,4-di(tri-butyl)phenyl)phosphinate. The content of the antioxidant is from 1 ppm to 1.0% by weight, particularly preferably from 10 to 1 ppm, based on the resin component constituting the optical film. The antioxidant may be used in combination of two or more kinds. In this case, the total content of these may be within the above range. The optical film of the present invention may have a single layer structure or a multilayer structure having a surface layer on the substrate layer. When the optical film of the present invention has a multilayer structure, the resin constituting the surface layer and the resin constituting the substrate layer may be composed of the same resin or independently selected from the resins exemplified as the film-forming resin. (Manufacturing Method of Optical Film) The method for producing an optical film of the present invention has a conventional method for producing an optical film, such as a solution casting method or a melt casting film method, in which a concave-convex surface is formed on a surface of a polymer film. The unevenness forming step is such that the center line average roughness Ra of the surface of one of the surfaces of the optical film satisfies the above formula. Preferably, the unevenness forming step is performed such that the other surface of the optical film is smooth. Hereinafter, the method for producing an optical film of the present invention will be described with reference to FIGS. 3 and 4, but the present invention is not limited to the embodiments. FIG. 3 is a view for explaining the production of the optical body of the present invention by a solution casting method. -31 - 201239420 A schematic diagram of a manufacturing apparatus of an example of a method of a film. Fig. 4 is a schematic view showing the configuration of a manufacturing apparatus which is an example of a method for producing an optical film of the present invention by a melt casting method. For example, in the solution casting method shown in Fig. 3, the step of casting a film from the casting mold 101 onto the support 100 is carried out in sequence: a dopant which dissolves or disperses the film raw material in a solvent. a solvent evaporation step of evaporating the solvent on the support 100 from the dopant after casting; peeling off the polymer film obtained by evaporating the solvent from the support 1 by the peeling roller 102 a step of forming a concavity and convexity on the surface of the polymer film by the molding roll 104; and stretching the polymer film 1〇5 in the direction of at least one of the width direction and the conveying direction in the tenter 106 a stretching step; a drying step of drying the polymer film in the drying device 107 to obtain an optical film; and a winding step of winding the optical film into a plurality of layers around the core by the winder 108. In Fig. 3, the unevenness forming step is carried out between the peeling step and the stretching step, but it is not particularly limited as long as it can form a predetermined unevenness, and may be between the stretching step and the drying step or the drying step. Implemented with the take-up step. The concentration of the resin component in the dopant is preferably from 10 to 35 mass%, more preferably from 15 to 25 mass%. The solvent used in the dopant is preferably one which dissolves the resin component, and is preferably one which dissolves the resin component and the additive at the same time. The solvent may be used singly or in combination of two or more kinds. In terms of production efficiency, it is preferred to use a good solvent for the mixed resin and a poor solvent, and in particular, in view of solubility of the resin, it is particularly preferred as a good solvent. A preferred range of the mixing ratio of the good solvent to the poor solvent is 70 to 98 mass -32 to 201239420%, and the poor solvent is 2 to 30% by mass. The good solvent and the poor solvent are defined as those which are used for dissolving the resin alone, and those which are swollen or insoluble when used alone are defined as poor solvents. The good solvent is not particularly limited, and examples thereof include an organic halide such as dichloromethane, dioxolane, acetone, methyl acetate, and ethyl acetacetate. When a cellulose resin or a (meth)acrylic resin is used as the resin component, a particularly preferred good solvent is methylene chloride or methyl acetate. The poor solvent is not particularly limited, and for example, methanol, ethanol, n-butanol, cyclohexane, cyclohexanone or the like can be preferably used. Further, for example, in the molten cast film method shown in Fig. 4, the melt of the film raw material is sequentially cast from the casting die 301 on the first cooling roll 302, and the contact roll 3 is used. 0: a casting step of pressing the film; a cooling step of winding the melted material after the casting film to the second cooling roll and the third cooling roll, and cooling; and cooling by a peeling roll 306 from the roll a peeling step of peeling off the film; forming a concavity and convexity forming step on the surface of the polymer film by the casting roll 307; and performing the polymer film in the tenter 309 in the direction of at least one of the width direction and the conveying direction Stretching step of stretching; by the winder 310, the polymer film (optical film) is wound into a multi-layer winding step around the core. In Fig. 4, the unevenness forming step is carried out between the peeling step and the stretching step. However, it is not particularly limited as long as a predetermined unevenness can be formed, and it can also be carried out between the stretching step and the winding step. The unevenness forming step will be described in detail below. The description of the unevenness forming step is a common method for forming the unevenness in the solution forming method in the solution casting method or the molten cast film method, unless otherwise specified, as long as the desired unevenness can be formed in the concave and convex forming step. The film is not particularly limited, and for example, a method in which a film is molded by a mold to transfer the uneven shape of the mold to the film can be used. In the third and fourth figures, the roll plate molding method for transferring the unevenness to the surface of the polymer film by the mold rolls 104 and 307 is shown, but is not limited thereto, and for example, a flat plate molding method or a continuous conveyance can be used. With version molding. It is preferably a roll plate molding method. When the roll plate molding method is employed, as shown in Fig. 3, the polymer film can be alternately wound around the conveying roller 103 and the casting roll 104 to transfer the surface shape of the casting roll to the polymer film. Alternatively, as shown in Fig. 4, the polymer film is passed between the back roll 308 and the mold roll 307 to transfer the surface shape of the mold roll to the polymer film. In the former case, the transfer rate can be controlled by the transport tension of the film, the number of mold rolls for winding the film, and the angle of the film with respect to the mold roll. The greater the transport tension, or the greater the number of mold rolls, the greater the transfer rate. The conveying tension of the film is preferably, for example, 60 to 300 N per 1 000 mm width. In the latter case, the transfer rate can be controlled by the pressing force of the casting roll relative to the back roll. The pressing force is preferably 150 to 250 kg/cm. When the film is produced by the solution casting method, the amount of residual solvent supplied to the polymer film in the uneven forming step is preferably from 20 to 100%. The residual solvent amount of the polymer film can be soaked and coated by changing the installation place of the mold roll, the drying condition in the solvent evaporation step of the film, the solid content concentration of the dopant, adjusting the transport speed of the film, and the like. Or spray the solvent to the film to control. The transfer rate can also be controlled by adjusting the amount of residual solvent. In the present specification, the amount of residual solvent can be expressed by the following formula.

-34- 201239420 Amount of residual solvent (% by mass) = {(Μ-Ν)/Ν} χ 100

In the formula, Μ is the mass of the film at the timed point, and N is the mass after drying the mash at 110 ° C for 3 hours. In particular, when the amount of residual solvent supplied to the polymer film of the unevenness forming step is calculated, it is the mass of the net mold not long before the uneven forming step. When the film is produced by the melt casting method, the temperature of the polymer film to be formed in the uneven portion forming step is preferably Tg to Tg + 80 °C when the glass transition temperature of the film is Tg (°C). At this time, it is preferred to set the surface temperature of the casting rolls so that the film temperature is within the above range. The transfer rate is controlled by adjusting the temperature of the polymer film and the mold roll. The casting rolls 104, 307 have irregularities on the outer peripheral surface corresponding to predetermined irregularities which the film surface should have. In particular, when the surface of the optical film which satisfies the above formula is satisfied, and Ra has a gradient which decreases or increases from the central portion toward both end portions in the width direction, the surface to be used has a corresponding unevenness (especially Ra). ) The concave and convex mold roll. The surface unevenness of the mold roll can be formed by sandblasting, micro-spraying, chemical etching, or sanding, and can be formed by hand processing. The transfer rate is usually from 1 to 50%. In order to achieve a transfer rate of more than 50%, the residual solvent amount of the film is too high, and the film cannot be sufficiently peeled off from the mold roll, or the film transport tension is excessively large, and breakage during transportation is not preferable. In the present specification, the transfer rate is a ratio of Ra of the optical film obtained after the transfer processing to Ra of the surface of the mold roll. The transfer processing can be carried out before the stretching, or after the stretching, the transfer rate is referred to herein, and when the stretching is performed after the transfer processing, the production by stretching is not included. 3 -35- 201239420 Attenuation of Concavities and Concavities Back Roller 3 08 usually uses a mirror-finishing roller. The surface roughness Ra of the back roll is preferably 10 nm or less, and more preferably 5 nm or less. In the method for producing an optical film of the present invention, the embossing step may be performed on both end portions in the width direction of the film before the winding step. A knurling portion is formed. The embossing step is a step of providing a knurled portion on both side edges of the film in the film width direction. The knurled portion is a convex portion that protrudes from the unprocessed region at a predetermined height, and by forming the knurled portion, it is possible to further effectively prevent agglomeration. The forming surface of the knurling portion may be a surface in contact with the casting roll, or a surface opposite to the surface, or both sides. The height of the knurled portion is set in the range of 0.05 to 3 times the film thickness T of the film, and the width (length in the width direction) is set in the range of 0.005 to 0.02 times the film width L. For example, when the film thickness is 40 μm and the film width is 1 000 mm, the height of the knurled portion is set to 2 to 12 μm, and the width is set to 5 to 20 mm. The embossed portion is usually continuously formed over the entire length of the conveying direction. The embossing step is usually achieved by an embossing device. The film can be subjected to a static elimination step between the embossing step and the winding step. (Application) The optical film of the present invention is particularly suitable for use as, for example, a protective film for a polarizing plate, The viewing angle is expanded by a film, a retardation film, or the like. When the optical film of the present invention is used as a protective film for a polarizing plate, the polarizing plate can be produced by a general method. Preferably, the adhesive layer is attached to the back side of the optical film of the present invention at -36 to 201239420, and bonded to at least one surface of a polarizing element which is formed by stretching in an iodine solution and stretched. On the other side, the optical film of the present invention or other protective film for a polarizing plate can be used. For example, a commercially available cellulose ester film (for example, Konica Minolta TAC KC8UX, KC4UX, KC5UX, KC8UY, KC4UY, KC12UR, KC8UCR-3, KC 8 UCR - 4, KC 8 UCR - 5, KC 8 UE, KC4UE, KC4FR-3, KC4FR-4, KC4HR-1, KC8UY-HA, KC8UX-RHA, the above is manufactured by Konica Minolta Opto Co., Ltd.) and the like. A polarizing element which is a main component of a polarizing plate is an element which allows only light of a polarizing surface in a certain direction to pass therethrough. A representative polarizing film which is known in the art is a polyvinyl alcohol-based polarizing film, which is obtained by dyeing iodine to polyethylene. Those who have an alcohol film and those who dye a dichroic dye to a polyvinyl alcohol film. The polarizing element ' can be formed by forming a film of a polyvinyl alcohol aqueous solution and subjecting it to uniaxial stretching and dyeing, or uniaxially stretching after dyeing, preferably by iodine compound. By assembling a polarizing plate to which the optical film of the present invention is bonded to a liquid crystal display device, various liquid crystal display devices having excellent visibility can be produced. In particular, a liquid crystal display device for outdoor use such as a large liquid crystal display device or an electronic signboard can be preferably used. The polarizing plate of the present invention is bonded to the liquid crystal cell by interposing the above-mentioned adhesive layer or the like. The polarizing plate of the present invention is preferably used in a reflective, transmissive, semi-transmissive LCD or TN type, STN type, 0CB type, HAN type, VA type (PVA type, MVA type), IPS type (including LCDs of various driving methods such as FFS method and the like. In particular, in the large-screen display device of the -37-201239420 30吋--5 4吋 type, the screen is not whitened, and the effect can be maintained for a long period of time. In addition, the color is uneven, flickering or uneven, and the eyes will not be fatigued after a long time of viewing. [Examples] [Experimental Example 1] <Example 1 A > (Modulation of dopant) Various components were formulated at the following ratios to prepare a dopant. Cellulose Acetate Propionate (CAP) 100 parts by weight (acetamyl substitution degree 1.9, propyl ketone substitution degree 0.8, Mn = 70000, Mw = 220000, Mw / Mn = 3.14) Polyol ester plasticizer (benzoic acid III Methylolpropane ester) 5 parts by weight of aromatic terminal polyester plasticizer (trimethylolpropane benzoate) 15 parts by weight of chloroform 430 parts by weight of ethanol 40 parts by weight. The above materials are sequentially placed in a closed container. In the case where the temperature in the vessel was raised from 20 ° C to 80 ° C, the temperature was maintained at 80 ° C and stirred for 3 hours to completely dissolve the cellulose acetate propionate. Then stop stirring and reduce the liquid temperature to 43 °C. The dopant was filtered using a filter paper (manufactured by Anjun Filter Paper Co., Ltd., filter paper No. 2 44) to obtain a dopant. -38- 201239420 (Manufacturing of Optical Film) In the unevenness forming step, the number of the casting rolls 104 is increased to five, the number of the conveying rolls 103 is increased to six, and the film is alternately wound around the conveying rolls and the mold In addition to the rolls, an optical film roll was produced by the same apparatus as the apparatus shown in Fig. 3. From the mold 101, the dopant was cast on a mirror-treated stainless steel support conveyor belt 100 at a dopant temperature of 35 ° C and a support temperature of 25 ° C. After drying the dopant film on the support with a dry air of 44 ° C, the amount of residual solvent dried to the dopant film was 1% by weight, and the peeling tension was 162 N/m by the peeling roller 102. The web is peeled off from the support. When the amount of the residual solvent of the film after peeling was 80% by weight, the mold roll 104 was brought into contact with the surface of the web to transfer the uneven shape. In the unevenness forming step, in detail, the transport tension was 180N. The polymer film was wound by coating at 90 degrees. All the casting rolls have Ra which have substantially uniform irregularities (Ra and Sm) in the axial direction, and have irregularities having Ra and Sm shown in the first table. The film after the uneven shape was transferred was formed by using a tenter 106, and a polymer film was produced by stretching the both ends of the film by a clamp and stretching it by 30% in the width direction of the film. At this time, the stretching temperature was 140 °C. The produced film was dried in a drying device 107 at a drying air of 120 °C. The film thickness was 40 μm. After the obtained film was cut to a width of 1,980 mm, a knurling process having a width of 10 mm and a height of 5 μm was applied to both ends, and the initial tension was 300 Å, the taper portion was 100%, and the corner portion was 30%. 5000 m is taken up to a core (core) having an outer diameter of 15 cm. The non-contact surface with the mold roll is the non-contact surface of the support in the casting step, which is assumed to be referred to as the A side. The contact surface with the mold roll, which is the contact surface with the support in the casting step, is assumed to be referred to as the B side. <Examples IB, 1D to 9D/Comparative Examples 1A to 3A, 1B to 3B, 1 D > In the dopant preparation step, the resin was changed, and the mixing ratio of CAP and acrylic resin was set to 50 by weight: 50; further containing a predetermined amount of predetermined inorganic fine particles in the dopant; controlling the amount of residual solvent of the film when transferring the uneven shape to the enthalpy shown in Table 1 by adjusting the transfer position of the roll; In the forming step, the casting rolls shown in Table 1 were used; and the number of rolls was set to the number of transfer rates shown in Table 1, except that the other ones were the same as in Example 1A. In the method, an optical film roll is produced. All the casting rolls have a substantially uniform concavo-convex shape (Ra and Sm) in the width direction. As the acrylic resin, Dianal BR85 (manufactured by Mitsubishi Rayon Co., Ltd.) Mw280000 was used. "IPA-ST" is a dispersion of cerium oxide microparticles (average particle size: 10 nm; organic cerium oxide sol IPA-ST, manufactured by Nissan Chemical Industries, Ltd.) ° "Aerosil 200V", which is treated by the following method. Aerosil 200V at a revolution of 500 rpm (-time particle size: 12 nm, Nippon)

After stirring for 30 minutes, the liquid was passed through a Manton Gaul in-type high-pressure disperser (H20 type; manufactured by Sanwa Machinery Co., Ltd.) three times. The load pressure at this time was 25 MPa. The average dispersed particle diameter (secondary particle diameter) was 100 nm. -40- 201239420 "Aerosil R8 1 2" is used to treat Aerosil R812 (manufactured by Nippon Aerosil Co., Ltd.) in the same manner as "A e r o s i 1 2 0 0 V". The average dispersed particle diameter (secondary particle diameter) was 8 Onm 〇 <Example 1C > (Preparation of granules) 100 parts by mass of Zeonor 1420 (manufactured by Zeon Corporation, Japan) as a cycloolefin resin was used as a phenolic resistance. Sumilizer GS (manufactured by Sumitomo Chemical Co., Ltd.) of oxidizing agent 0.3 parts by mass of neopentyltetrakis[3-(3,5-di(tri-butyl)-4-hydroxyphenyl)propionate as a phenolic compound] (Irganox 1〇1〇 (manufactured by Ciba Specialty Chemicals Co., Ltd.) of the commercial product) 0.5 parts by mass of tetrakis(2,4-di(tri-butyl)-5-methylphenyl)-4 as a phosphorus compound The mixture was mixed with 0.3 parts by mass of 4'-biphenyl diphosphonate (GSY-P101 (manufactured by Seiko Chemical Co., Ltd.)), and dried under reduced pressure at 60 ° C for 5 hours. The resin mixture was melt-mixed at 23 ° C using a biaxial extruder, and dried to form a pellet. At this time, in order to suppress the heat generation caused by the shearing during kneading, a full screw type screw is used instead of the kneading disc. In addition, vacuum extraction is performed from the vent holes to attract and remove volatile components generated in the kneading. From the feeder supplied to the extruder or the supply hopper, the extruder die to the cooling bath, a nitrogen gas atmosphere is formed to prevent moisture from absorbing moisture into the resin. (Manufacture of Optical Film) -41 - 201239420 An optical film roll was produced by the apparatus shown in Fig. 4. The pellets are supplied to an extruder (not shown) and melted. The melt at 270 ° C is melt-extruded from the mold 301 in a film form on the surface temperature 13 (the first cooling roll 302 of the TC, A cast film was produced at an elongation ratio of 20. In this case, a mold 301 having a lip pitch of 1.5 mm and a lip surface average surface roughness RaO. Olpm was used. The first cooling roll 302, the second cooling roll 304, and the third The cooling roll 305 is made of stainless steel having a diameter of 40 cm and is provided with a hard chrome plating on the surface. Further, the temperature adjustment oil is circulated internally to control the surface temperature of the roll. The contact roll 303 is formed to have a diameter of 20 cm, and the inner tube Both the outer cylinder and the outer cylinder are made of stainless steel, and the surface of the outer cylinder is coated with hard chrome. The thickness of the outer cylinder is set to 2 mm, and the temperature adjustment oil is circulated in the space between the inner cylinder and the outer cylinder to control the elasticity. The surface temperature of the contact roll was then pressed on the first cooling roll 302 by a contact roll 303 having a metal surface of 2 mm thick, and the film was pressed at a linear pressure of 10 kg/cm. 1 80 ° C ± 1 ° C. Here, the film temperature on the contact roller side when pressed, The temperature of the film at the position where the contact roller on the first cooling roller is in contact with the non-contact type thermometer is measured at a position away from 50 cm in a state where the contact roller is retracted without a contact roller, and 10 points in the width direction are measured. The average surface temperature of the film is 値. The glass transition temperature Tg of the film is 137 ° C. The glass transition temperature Tg is DSC6200 (manufactured by Seiko Co., Ltd.) by DSC method (nitrogen gas, heating temperature 10 ° C / The glass transition temperature of the film extruded from the mold was measured. The surface temperature of the contact roll was set to 130 ° C, and the surface temperature of the second cooling roll was set to 1 〇〇 ° C. The contact roll, the first cooling roll , the second cooling roller and the third cooling

-42- 201239420 The surface temperature of each roller of the roller refers to the temperature of the roller surface using the non-contact type thermometer 'the position from the position where the film is initially in contact with the roller at a position of 9 〇 relative to the direction of rotation, in the width direction. The average enthalpy obtained at the measurement point was set to the surface temperature of each roller. The film is then passed between a pair of rolls consisting of a casting roll 307 and a back roll 308 to transfer the irregularities. At this time, the casting rolls were maintained at 180 ° C and the line pressure was set to 200 kg/cm. The casting rolls have substantially uniform concavities and convexities (Ra and Sm) in the axial direction, and are provided with irregularities having Ra and Sm shown in the first table. Further, the back roll had a surface temperature of 100 ° C, a surface roughness Ra of 3.2 nm, and an Sm of 4.4 μm. Then, the film is introduced into a tenter 309 having a preheating zone, a stretching zone, a holding zone, and a cooling zone (in order to ensure insulation between the zones, the zones also have a neutral zone), in the width direction Stretch 30% at 160 °C. Then, the mixture was cooled to 70 ° C, and then the clamp was opened, and the grip portion was cut out, and a knurling process with a width of 10 mm and a height of 5 μm was applied to both ends, and the width was changed to 1980 mm, and the initial tension was 30 ON and the taper was 100. %, the corner portion is 30%, and 5000m is taken up to a core (core) having an outer diameter of 15 cm. The film thickness was 40 μπα. The non-contact surface with the mold roll is the contact surface with the contact roll in the casting step, which is assumed to be referred to as a kneading surface. The contact surface with the mold roll is the contact surface with the first cooling roll in the casting step, and is assumed to be referred to as a B surface. <Comparative Example 1 C to 3C &gt; In the granule preparation step, the granules further contain a predetermined amount of predetermined inorganic fine particles; and in the unevenness forming step, the mold shown in the third table is used - 43-201239420 rolls, Except for this, other optical film rolls were produced by the same method as in Example 1C. The casting rolls have a substantially uniform uneven shape (Ra and Sm) in the axial direction. "KE-P10" is a cerium oxide microparticle dispersion having an average particle diameter of 1 〇〇 nm (Seahostar-ΚΕ-ΡΙΟ, primary particle diameter: 100 nm (manufactured by Nippon Shokubai Co., Ltd.)). &lt;Evaluation&gt; (Measurement of Ra and Sm) Ra and Sm of the A surface and the B surface in the optical film were measured by the above method. (Calculation of Load P) P is calculated from the above formula (2). (Measurement of the modulus of elasticity E) According to ISO 527-3', a tensile tester manufactured by Toyo Seiki Seisakusho Co., Ltd. was used for tensile test at 23 ° C and 5 5 % RH, and the strength data from 10% twist was used. In the middle, the elastic modulus in both directions of the film transport direction (MD direction) and the direction orthogonal to the transport direction (TD direction) is obtained. For example, the optical film of Example 1 A has an elastic modulus in the MD direction of 2,890 MPa, an elastic modulus in the TD direction of 3,121 MPa, and an average enthalpy of 3,006 MPa. -44 - 201239420 (Calculation of the second moment I of the section) I is calculated from the above formula (3). (calculation of 値 on the right side of equation (1)) Calculated based on the obtained P, Sm, E, and I. (Agglomeration) After the optical film roll was held for one week at 40 ° C and a relative humidity of 80% RH, the film was taken up and evaluated. Specifically, a film of a length of 100 m was taken out from the core, and the state of generation of the attached or convex agglomerates was evaluated in the following manner. * Attachment fault ◎: There is no attachment failure at all; 〇; only the attachment failure from the center of the film at the distance from the core l〇〇m is still good: △: Although from the center of the film at a distance of 500m from the core The part is attached with a failure, but there is still no problem in practical use: X; there is a problem with the attachment failure from the center of the film at a distance of 1 距离m from the core. . Convex fault ◎: no convex fault at all; 〇; only convex fault from the end of the film at the distance from the core l〇〇m, still good: △; although the film end from the distance of the core 50,000m The part is convex-45-201239420, but it is still practically problem-free: X; there is a problem in that a convex fault is generated from the end of the film at a distance from the core l〇〇〇m. (Haze) The film was taken up from the optical film roll, and any three points were measured by Haze Meter NDH2000 (manufactured by Nippon Denshoku Co., Ltd.) in accordance with JIS-K6714, and the average 値HA was obtained. ◎ : ΗA&lt;0. 1 0 ; 〇: 0.10 Helmet ΗΑ &lt;0·50 ; △ : 0.50 Xin ΗΑ &lt;1·00 (no problem in practical use); X : l.OOS ΗΑ (practical problem). (Dynamic Coefficient of Friction) The coefficient of dynamic friction between the surface and the inside of the film was measured in accordance with JIS-K-7 1 25 (1 987). Specifically, the film sheet was cut out from the optical film, placed in such a manner as to contact the inside and outside of the film, and a weight of 150 g was applied to horizontally pull the sample at a moving speed of 100 mm/min and a contact area of 30 mm x 30 mm. The weight is extended, and the load (F) when the weight is moved is determined, and the dynamic friction coefficient is obtained from the following formula. Dynamic friction coefficient=F(gf)/weight weight P(gf) -46- 201239420 00 Molding roll (3) Transfer rate se 00 CO g in S5 oo CO * Find CO CO g in as oo CO * Find OO CO 5β CM CO Ο μ Find GO CM ΙΟ LO ΙΟ as LO in CM C0 Number of rolls m LO 嗒in m ID * m LO 皞l〇m in * 嗒r— m T&quot;· 嗒* 嗒CO m CO mm 嗒τ— τ— 嗒T— m τ*·· m τ— Sm( jU m) C\J t—· cvj L 12,5_| * CM CM I 12.5 I * CM &lt;NI 12·5 I * σ&gt;σ&gt; CO CO CO CO CO τ* Ra(nm) 130nm | 80nm | 130nm | * 130nm 80nm | 130nm I * | 130nm | 80nm I 130nm * | 130nm I 80nm 80nm | 80nm I 80nm I 80nm | 100nm | 16nm 1 16nm 16nm Roll 1 1 I * 1 1 1 * | 180°C | | 180°C | | 180°C | * 1 i I \ \ 1 1 1 1 1 Residual \mm 80% 80% 80% * 80% 80% g 00 * I 1 1 * 1 60% 60% 60% | 60% 60% 60% 60% | 30% | 25% se 00 Inorganic particles (1) Content (2) (% by weight) 1 1 1 l 0.50 | 1 1 1 1 0.50 1 I 1 1 1 0.50 1 II 0.15 0.10 0.10 1 0.04 1 1 1 1 Average dispersed particle size 1 1 1 100nm| 1 1 1 100nm II 1 1 100nm 1 II 80nm 80nm 100nm 10nm 1 1 1 Sao Wr> tlrtn l P 1 1 1 Aerosil 200V 1 1 1 Aerosil 200V I 1 1 KE-P10 1 II Aerosil R8121 Aerosil R812 Aerosil 200V IPA-ST 1 1 1 Resin m 郷CAP CAP CAP CAP CAP/Acrylic CAP/Acrylic CAP/Acrylic Tree Moon CAP/Acrylic Resin Cycloolefin Resin Cycloolefin Resin Cycloolefin Resin Cycloolefin Resin CAP/Acrylic Resin CAP/Acrylic Resin GAP/Acrylic Resin GAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic Resin CAP/Acrylic Resin GAP/Acrylic Resin Synthetic Example 1 All Comparative Example 1A I Comparative Example 2A| Comparative Example 3A I Example ib| I Comparative Example 1B| Comparative Example 2B Comparative Example 3B Example 1C Comparative Example 1C Comparative Example 2G Comparative Example 3C Example 1D Example 2D Example 3D Example 4D Example 5D Example 6D Example 7D Example 8D Example 9D Comparative Example 1D.豳赃 鏺 鏺 伥 伥 谳 谳 * * 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸 酸Speak ugly ^ 余13§§遐^Lonely 1«411*-0-store £(3). General Zhang Changyu "|" &lt;43 Storage § (1.) -47- 201239420

Pm friction coefficient 0.76 0.92 0.97 0.71 0.72 I 0.86 I l〇.89 I t 0.69 | L〇J5 I 0.89 II 0.94 II 0-71 I 072 I 0.69 II 0.66 I 0J1 I 0.67 II 0.62 II 0.64 II 0.68 II 0.66 I 0.97 Haze 〇〇〇X 〇〇〇X 〇〇〇x 〇〇〇〇〇〇〇〇〇〇0.52 in ό0.49 Λ16Ι I 0.46 LMlJ [Μη CO r— I 0.62 I 0.48 0.59 [2Δ2\ | 0.36 I 0.29 I 0.12 0.26 0.24 0.28 0.16 0.08 0.07 0.07 Agglomerated convex 〇 XX 〇〇 XX 〇〇 XX 〇〇〇〇〇〇〇〇〇〇X Attached 〇 XX 〇〇X &lt; 〇〇XX 〇〇〇〇〇〇〇 〇〇〇X (1) to the right of (1) | 47.30 | | 48.52 | | 53.63 | 144.92 | I 46.60 | | 49.03 | I 50.28 | | 45.42 | 丨49.15 | I 50.51 | I 53.29 | I 47.82 | | 27.39 | 16.64| 3.42 I 3.64 I 3.86 3.22 0.08 0.06 I 0.06 Optical film roll film thickness t iU m) ooooooooooooooooooo 〇〇o N Job 硪i Employment CSJ — CO inch · CSJ inch · - 3 Tj; — CSI — CC — in inch · CM — Bu CO CO inch · inch 00 CO CO i n c6 CD CO 卜 7-05 in BI9 15 Ra (nm) CD csi CNi csi Ύ-· CO lO c\i 卜 csi ί- ον! inch Csi r- cvi 00 csi csi Cvj CO c\i 00 o CO 00 〇0.09 o 0.08 •N 磕mms Contact surface (B side)| EE CO ^ &quot;r- 00 T-· r— 12-2 I in t— T-* I 11-9 II 12.0 II 11.6 II 110 I T-· T-· CO r— t— I 10.9 | 00 CT) CO CO inch·σ\ inch· o lO in 00 CO 00 r- Ra (nm) 49.2 39.8 48.9 | 49.5 39.5 49.0 | 50.1 I |5〇 Il ^3J ^2| 48.6 |5L〇J 22.0 CO inch· 00 &lt;Ji LO 卜'' CO o inch o' 0.05 (mm4) 6.24 x 10-8 6.29 x 10-8 6.51 X10~8 6.13 X10~8 6.24X10—8 I 6.35X1CT8 II 6.40X1 (T8 II 6·19Χ1 (Γ8 I 5.87x10-8 5.92X10-8 6.03 x 10-8 15.81 x10~8l I 5.23 X 10-8 I 4.43 x 10-8 2.61 x 10~8 2.61 x 10~8 2.67X10-8 2.72X10-8 2.56 x 10-8 7.47 x 10~9 6.93 x 10'9 6.93 x 10-9 CL § 1.77 x 10~3 1.79X 1〇-3 1.85 X 10-3 1.74X 10~3 1.77X 10-3 | 1.80X 10~3 I 1.82 X 10~3 1.76 x 10-3 ! 1.67 x 10-3 I 1.68 x 10~3 I 1.71 X10-3| I 1.65 x 10~3 I 1.48 x 10-3 1.26 x 10~4 7.42 x 10~4 7.42 x 10-4 7.58 x 10 ~4 7.73 x 10~4 7.27 x 10~4 2.12 x 10-4 1.97 x 10~4 1.97 x 10~4 LU (MPa) | 3006 | | 3006 | | 3006 | 3006 |3051 | | 3051 | I 3051 | |3051 | | 2404| | 2404| I 2404| I 2404 | 3051 | 3051 I 3051] I 3051 I 3051 | I 3051 | I 3051 | 3051 |3051| |3051| Example 1A Comparative Example 1A Comparative Example 2A Comparative Example 3A I Example 1B| Comparative Example IB Comparative Example 2B Comparative Example 3B Example 1C I Comparative Example 1C Comparative Example 2C Comparative Example 3C Example 1D Example 2D Example 3D Example 4D Example 5D Example 6D Example 7D Example 8D Example 9D Comparative Example 1D. A 3}·Νίι^«[ι]·Η&^,ΈΕ?0τTMχ]^ιι,^·Ν“(Ιώ)/(Εω.&·ιη3*Ι—.ε”^«^δα) ^^(17) The same as Example 1 B, 1D to 9D except that the ratio of the CAP of Examples IB and ID to 9D to the acrylic resin-48-201239420 is 5:95 by weight ratio. An optical film was produced. The results were the same as those of IB and 1D to 9D, and no agglomeration occurred, and the haze and dynamic friction coefficient were also good. [Experimental Example 2] &lt;Examples 1E to 12E&gt; In the granular material preparation step, a predetermined amount of predetermined inorganic fine particles are further contained in the granular material: and in the unevenness forming step, Ra is axially oriented from the central portion toward An optical film roll was produced by the same method as in Example 3 D except that the both end portions were continuously changed, and a mold roll having a substantially uniform Sm in the axial direction (see Table 3) was used. &lt;Evaluation&gt; The optical film is taken up from the optical film roll, and a sample is prepared from the center portion, one end portion, and the other end portion in the width direction; for the center portion, one end portion, and the other Measuring and calculating the respective flaws on the B side and the A side of the optical film at one end; using the sample prepared from the center portion as an evaluation sample for the attachment failure; and using the end portion The sample was evaluated by the same method as the evaluation method of Experimental Example 1, except that the sample was evaluated as a convex failure. The ends of one end show the same flaw at the other end. As a result, as shown in the fourth table, in Examples 1 to 4E, the attachment failure at the center of the width was not generated at all after the agglomeration test. Further, in Examples 7E to 10E, after the agglomeration test, it was not produced at the vicinity of the width end, and it was easy to produce a convex failure of -49 - 201239420, and it was easy to roll out the film from the film roll. Se moving] Molding roller (3) Stupid mt—· τ·* τ— mm τ— τ— 嗒mmr— m Ύ~· m τ~· The other end of the roller end Sm 1 (&quot; m) csi 7— Τ— csi CD inch · σ> oq 00 〇c\i ▼-· ο CVJ o in Ο in oo 寸 · 1 Ra (nm) Another T- ο CO cn 卜σ> ο 00 σ&gt;卜σ&gt; CNJ τ~ O) CM r— CM CO r^· CSJ CO 7—CO 00 CVJ CO Τ-TM One end Sm (jU m) csi τ — csi τ— &lt;7i σ> ·· σ&gt; 00 — σ> Ύ —σ> T— σ> ·· σ&gt; σϊ 00 — Ra (nm) r·* r— CO τ— σ> σ> § σ&gt; Bu CO CO CO CO τ — CSI CO CsJ CO TTM CO 00 Csi CO τ—The center of the roll 1_ Sm (&quot;m) o csi Ο c\i ο LO Ο iri oq 05 τ— τ- ΟΝ CD inch' cn 1 oq inch _ Ra (nm) in CO T~ ΙΟ CQ CM CO τ — CM CO y-^ 00 oo 荔τ·· τ— C0 τ— Ύ—CO Ύ—§§ Bu Inorganic particles (1) Content (2) (% by weight) 1 ir> O 1 in o 1 1 1 m τ- Ο 1 ID 5 1 I 1 80nm | 1 80nm 1 1 1 80nm 1 80nm 1 l Μ ' • Kf\ tlmtl m 1 Aerosil R812 1 Aerosil R812 1 1 1 Aerosil R812 1 Aerosil R812 1 l Resin mm CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic CAP/Acrylic Resin CAP/Acrylic Resin Example 1E Example 2E Example 3E Example 4E Example 5E Example 6E Example 7 实施 Example 8E Example 9E Example 10E Example 11E Example 12E. Oh, ugly? : Yukan® 癍毋 veins S-frts (3).邮如张长«“—J - frlts α) -50- 201239420 si] Non-contact surface of optical film roll and mold roll (A side) Sm (&quot;m) OO co CO CO 00 CO in co Oi CO σ&gt; Co CO c6 l〇CO O) CO 00 CO Ra (nm) p 00 o •r— p CD 〇CO σί Ο 05 Ο p 〇1—contact surface with the mold roll (B side) Two-class Ra change rate lj^ .54% I 1-2.48% I ^39.39% I [-40.00%! 1-2.17% I |-41.79%| 1 2.673⁄4 12.61 % I 164.10% II 65.00% II 2.44% I 73.68% of formula (1) Right (4) | 49.04 | [50.28] U42J I 3.22 I U42 I 3.22 | 1 49.04” I 50.28 I L3.64 3.64 L342J I 3.42 | Sm (U m) I 11.9 I σ&gt; Inch ' 00 inch · σ> 00 — σ&gt τ—I 12.0 I o ici o LO &lt;Ji — inch · Ra (nm) 49.9 51.2 ο cn co in — cn co 50.01 51.2 inch cd &lt;〇CO CM CO cd I (mm4) |6.35X10_8I 16.40X10' 81 12.61 Χ10~8| I2.56X10-8! 12.61 X10~81 I2.56X10-8! Ι6.35Χ10-8! |6.4〇χΐ〇-8Ι |2.67X10~8| |2.67x1〇-8I 12.61 xur8 丨2.61 xur8 Q. 2 |1.8〇x1〇-3| |1.82X10'3| 17.42x10—41 |7.27x1〇-4| 17.42 xur41 “7.27 xur41 1.80x10-3 |1.8 2χ1〇-3| 17.58 xur41 Γ7.58Χ10-4! 17.42X10-41 [7.42X10-41 Right side of the central part (1) (4) | 50.28 | | 51.55 | I 3.64 II 3.64 I | 3.42 | I 3.64 I | 47.81 49.04 | | 3.22 | [3.22 | I 3.42 I | 3.22 | Sm (U m) mmJ t — csi o in o lO 〇&gt; o in C0 Ύ&quot; τ— &lt;Ji 00 sentence; 00 — CT) inch · 00 sentences _ Ra (nm) L512I 152^ CO cd in cd &lt;〇cd ”49.9 σ&gt; co 〇· inch· — 00 co I (mm4) |6.40x10_8| 16.45x10-81 |2.67x1〇-8| |2.67x10~8| 12.61 x1〇-8| I2.67X10-8! |6.29χ1〇-8| fa35xi〇-8l i2.56x1〇-8| [2.56X10-8! 12.61 χΐο~8| , 2.56 x1ο -8 Dl Z I1.82x10~3I I1.83X 10_3I |7.58x1〇-4| |7.58x1〇-4| 17.42 X 10-41 7.58 ΧΗΓ4 |1.79χ10~3| |l.8〇x 1〇-31 I127X 10-^1 17.27X10'41 17.42x1 O'41 丨7.27 xUT4 IIE (MPa) | 3051 | | 3051 | | 3051 | | 3051 | | 3051 | I 3051 | | 3051 | I 3051 | | 3051 | | 3051 I | 3051 | I 3051 I 丨 Example 1E| 丨 Example 2E| Example 3E 丨 Example 4E| 丨 Example 5E| Example I Example 7 Ε | Example 8E Example 9E Example 1 〇 E Implementation 11E I Example 12E |. Day TyoIB: 鳐嫩 &lt;·&amp;_*. Ml-Nl^e 目]ffidml伶, EEglcn χ, M}-hl“?UJ)/(eES · d) ·Incvlr ε”^^4^δα ) 赃 (inch) s -51 - 201239420 [第5 Table] Agglomerate-attached convex embodiment 1 Ε 〇 Example 2 ◎ 〇 Example 3 Ε 〇 Example 4 ◎ 〇 Example 5 〇〇 Example 6 Ε Example 7 〇 ◎ Example 8 Ε ◎ Example 9 Ε 〇 ◎ Example 10 〇 ◎ Example 11 Ε Example 12 〇〇 Industrial Applicability: The present invention has a wide range of industrial applicability in the technical field of optical films. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view for explaining the formula prescribed by the present invention. Fig. 2 is a schematic view for explaining a calculation formula when the amount of deflection δ1 in the beam structure of the member is obtained in the structural mechanics. Fig. 3 is a schematic structural view of a manufacturing apparatus for explaining an example of a method for producing an optical film of the present invention by a solution casting method. Fig. 4 is a schematic structural view showing a manufacturing apparatus of a method for producing an optical film of the present invention by a melt casting method.

-52- 201239420 [Explanation of main component symbols] 100: Support body I 0 1 , 3 0 1 : Cast film mold 1 0 2, 3 0 6 : Peeling roll 104, 307: Mold roll 105: Polymer film 106, 309: Tenter 1 〇 7 : Drying device 108 , 310 : Coiler 3 02 : 1st cooling roll 3 03 : Contact roll 3 0 8 : Back roll -53-

Claims (1)

201239420 VII. Patent application garden: 1. An optical film characterized in that: - the center line average roughness Ra (mm) of the surface of the square surface and the average interval Sm (mm) of the concave and convex satisfy the formula (1), and The resin is contained, and the content of the fine particles with respect to the resin component is 0.2% by weight or less; Ra^3.125xPxSm3/(ExI) (1) [In the formula (1), P is adjacency to the surface of the film by the tension when the film is taken up; The load (N) applied between the convex portions is represented by the formula (2), E is the elastic modulus (MPa) of the film, and 1 is the second moment of the film (mm4) of the film represented by the formula (3); = (F/x)xSm (2) (in equation (2), x is the film width (mm) when the film is taken up, and F is the film tension (N) when the film is taken up); I = (Smxt3)x 1 0*3/1 2 (3) (in the formula (3), t is the film thickness (mm) of the film). 2. The optical film of claim 1, wherein the other side has a center line average roughness Ra of 5 nm or less. 3. The optical film according to claim 1 or 2, wherein the center line average roughness Ra of the one surface is 0.4 to 70 nm. 4. The optical film of claim 1, wherein the aforementioned resin contains a cellulose resin. 5. The optical film of claim 1, wherein the resin comprises (meth)acrylic resin. 6. An optical film roll, which is wrapped around the core, as claimed in the application. The optical film roll in which the optical film of any one of the items 1 to 5 is wound into a plurality of layers is characterized in that: Ra of the one surface is reduced from the central portion toward both end portions in the width direction. Or increase the gradient. 7. A method for producing an optical film, comprising: forming a concavity and convexity on a surface of a polymer film having a content of the fine particles of 0.2% by weight or less with respect to a resin component, so as to form a center line of a surface of one surface The average roughness Ra (mm) and the uneven interval Sm (mm) satisfy the formula (1); Ra 2 3 . 1 2 5 XP x Sm3/(EXI) (1) [In the formula (1), p is a film The load applied to the adjacent convex portions of the film surface by the tension at the time of winding (N)' is represented by the formula (2), E is the elastic modulus (MPa) of the film, and 1 is the film represented by the formula (3) The second moment of the section (mm4)]; P = (F/x)xSm (2) (in the formula (2), x is the film width (mm) when the film is taken up, and F is the film tension when the film is taken up. (N)); I = (Smxt3) x 10'3/12 (3) (in the formula (3), t is the film thickness (mm) of the film). 8. The method of producing an optical film according to claim 7, wherein the unevenness forming step is performed so that the other mask of the optical film has a center line average roughness Ra of 5 nm or less. -55-