TW200825479A - Optical film, method for producing the same, polarizing plate, and liquid crystal panel - Google Patents

Abstract

To provide a wide optical film excellent in film thickness uniformity and surface smoothness. The optical film consists of a cyclic olefin resin, has a width of 1,000 mm or more, is cut along the film width direction per 100 mm to give films each having a size of 100 mm*500 mm, and exhibits a variation of the melt flow rate of within +-5% when its melt flow rate (MFR) at 260 DEG C under 98N load is measured according to JIS K7210.

Description

[Technical Field] The present invention relates to an optical film which is excellent in film thickness uniformity and surface smoothness of a cyclic olefin resin, and a method for producing the same, 'a polarizing plate using the optical film, and LCD panel. [Prior Art] The cyclic olefin resin is excellent in transparency, heat resistance, moisture resistance, etc., and can be suitably used for optical film applications. In general, a film formed of a cyclic olefin resin can be produced by a solution casting (f 1 〇 w c a s t i n g) method (solution casting method) or a melt extrusion method, and can be produced by stretching or the like as needed. An optical film is excellent in optical properties such as transparency, and it is important that the film is homogeneous and the optical unevenness is small. In the method of manufacturing an optical film which can prevent or suppress optical unevenness which occurs when the optical film is produced, for example, by using a specific T-die which can suppress the defect shape of the die lip, it is melt-molded in the manufacturing. In the optical film, a method of suppressing the occurrence of a concavo-convex pattern (mold line) which can be continuously generated along the extrusion direction of the film is proposed (see Patent Document 1). In recent years, as the size of the liquid crystal panel has increased, the optical film used for the polarizing plate has been requested to be wider than the width of 1 000 mm. However, in the case of industrially producing a wide film, it is extremely difficult to maintain the uniformity of the film thickness in the width direction. Further, even if the above-mentioned mold line is rarely generated, an optically homogeneous wide film cannot be obtained, and there is a problem that the film productivity is extremely poor. 5 - 200825479 [Patent Document 1] JP-A-200 5 - 1 48 568 OBJECTS OF THE INVENTION [Problems to be Solved by the Invention] The present invention is an industrially produced wide-film film, and an object of the invention is to provide an optical film having excellent film thickness uniformity and surface smoothness by a cyclic olefin resin. film. [Means for Solving the Problem] The optical film of the present invention is an optical film having a linear olefin-based resin having a structural unit derived from a compound represented by the following formula (1) and having a width of 1 000 mm or more, and is characterized by A film having a size of l〇〇mmx 5 00 mm was cut out every 100 mm in the width direction of the film as a sample, and JIS K7210 was used to measure the melt flow rate (hereinafter referred to as "MFR") at 260 ° C and 98 N load. The measurement deviation of MFR is within ± 5%.

(In the formula (1), R1 to R4 represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or another monovalent organic group, each of which may be the same or different. Further, any of 'R1 to R4' They can be bonded to each other to form a single-ring or multi-ring structure. -6 - 200825479 m is 0 or a positive integer, p is 0 or a positive integer). Here, the structural unit of the above cyclic olefin-based resin is preferably a structure having the following general formula (2). 【化4】

(In the formula (2), R1 to R4, p, m are the same as defined in the above formula (1). The first method for producing the optical film of the present invention is to mix a plurality of cyclic olefin resins having the same composition and different average molecular weights. The average molecular weight of the resin supplied to the molding machine is adjusted to form the particles, and the optical film is formed by using the particles. Further, in the second method for producing the optical film of the present invention, a plurality of cyclic olefin-based resins having the same composition and different average molecular weights are mixed, and the average molecular weight of the resin supplied to the molding machine is adjusted to be constant, so that the optical film former is formed. Its characteristics. Next, the present invention relates to an optical film obtained by further stretching the above optical film. Next, the present invention relates to a polarizing plate characterized by laminating the above optical film on at least one side of a polarizing element. 200825479 Next, the present invention relates to a liquid crystal panel characterized by laminating the polarizing plates on at least one side of a liquid crystal display element. [Effect of the Invention] According to the present invention, there is provided a wide optical film comprising a cyclic olefin resin which is excellent in film thickness uniformity and excellent in surface smoothness. Further, in the case of a film which is stretched for an optical film, a film which is optically non-uniform can be suitably used as a phase difference or an optical axis. Since the optical film according to the present invention is excellent in film thickness uniformity and surface smoothness, the optical unevenness is small, the productivity of the film is good, and the haze is small and the transparency is excellent in the stretched film, and the large-screen liquid crystal is used. The display and the like can achieve a high degree of performance without deformation or unevenness. [Best Mode of Carrying Out the Invention] "Optical Film" &lt;Cyclic olefin-based resin&gt; The cyclic (olefin) resin used in the optical film of the present invention may, for example, be the following (co)polymer. (1) A ring-opening polymer of a specific monomer represented by the above general formula (1). (2) A ring-opening copolymer of a specific monomer and a copolymerizable monomer represented by the above general formula (1). (3) A hydrogenated (co)polymer of the ring-opened (co)polymer of the above (1) or (2). Further, in (3), the structural unit of the hydrogenated polymer of the above (1) ring-opening polymer can be represented by the above general formula (2). -8 - 200825479 (4) The hydrogenated (co)polymer is obtained by subjecting the ring-opening (co)polymer of the above (1) or (2) to cyclization by a Friedel Kraft reaction. (5) A saturated copolymer of a specific monomer represented by the above general formula (1) and an unsaturated double bond-containing compound. (6) An addition (co)polymer selected from the specific monomers represented by the above general formula (1), one or more monomers of a vinyl cyclic hydrocarbon monomer and a cyclopentadiene monomer, and hydrogenation thereof (co)polymer. (7) A cross-copolymer of a specific monomer and an acrylate represented by the above general formula (1). &lt;Specific monomer&gt; Specific examples of the specific monomer described above may be exemplified by the following compounds, but the present invention is not limited to these specific examples. It can be exemplified by bicyclo [2.2.1] hept-2-ene, tricyclo [4·3·0·125]-8 -癸; I: Greek, tricyclo[4·4·0.12, 5]-3· Undecene, tetracyclic [HO.l2,5·:!7,1. ;^-12 suspects, five rings [6·5·1·13,6·〇2,7·〇9,13]_4·15 suspects, 5-methylbicyclo[2.2.1]heptan-2- Alkene, 5-ethylbicyclo[2·2·1]hept-2-ene, 5-methoxycarbonylbicyclo[2.2.1]hept-2-ene, 5-methyl-5-methoxycarbonylbicyclo [221]g_2_storage, 5-cyanobicyclo[2.2.1]hept-2-ene, 8-decyloxycarbonyltetracyclo[4.4.0.12, dodecene, -9- 200825479 8·ethoxy Carbonyltetracyclo[4·4·0· 12'5.17'1()]-3-dodecene, 8-n-propoxycarbonyltetracyclo[4.4.0· 12,5.17,1()]-3- Decadiene, 8-isopropoxycarbonyltetracyclo[4.4.0·12'5.17'1()]-3-dodecene, 8-n-butoxycarbonyltetracyclo[4.4.0·12'5.17 '1()]-3-dodecene, 8-methyl-8-methoxycarbonyltetracyclo[4.4.0·12'5.17'1()]-3-dodecene 8-methyl-8 -ethoxycarbonyltetracyclo[4.4.0. 12'5.17,1()]-3-dodecene 8-methyl-8-n-propoxycarbonyltetracyclo[4.4.0· 12'5·17 '1()]-3-dodecene, 8-methyl-8-isopropoxycarbonyltetracyclo[4.4.0. 12'5.17'1()]-3-tetradecyl, 8-methyl -8-butoxycarbonyltetracyclo[4.4.0. 12'5.17'1()]-3-dodecene 5-ethylenebicyclo[2.2.1]hept-2-ene, 8- Ethyltetracyclo[4.4.0. 12'5.17'1()]-3-dodecene, 5-phenylbicyclo[2·2·1]hept-2-ene, 8-phenyltetracyclo[4.4 .0. 12'5.17'1()]-3-dodecene, 5-fluorobicyclo[2.2.1]hept-2-ene, 5-fluoromethylbicyclo[2.2.1]hept-2-ene, 5-trifluoromethylbicyclo[2.2.1]hept-2-ene, 5-pentafluoroethylbicyclo[2.2.1]hept-2-ene, 5.5-difluorobicyclo[2.2.1]hept-2- Alkene, 5.6-difluorobicyclo[2.2.1]hept-2-ene,-10-200825479 5.5-bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.6-bis(trifluoromethyl) Bicyclo[2·2·1]hept-2-ene, 5-methyl-5-trifluoromethylbicyclo[2.2.1]hept-2-ene, 5.5.6-trifluorobicyclo[2.2.1 Hept-2-ene, 5.5.6-tris(fluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.5.6.6-tetrafluorobicyclo[2·2·1]hept-2-ene, 5.5 .6.6- Four (trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.5-difluoro-6,6-bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene , 5.6-difluoro-5,6-bis(trifluoromethyl)bicyclo[2·2·1]hept-2-ene, 5.5.6-trifluoro-5·trifluoromethylbicyclo[2.2.1] Hept-2-ene, 5-fluoro-5-pentafluoroethyl-6,6-bis(trifluoromethyl)bicyclo[2.2.1]heptane-2-storage, 5,6-a-5-seven -isopropyl-6-di-win methyl double mourning [2.2.1] hept-2-ene, 5-chloro-5,6,6-trifluorobicyclo[2.2.1]hept-2-ene, 5.6- Dichloro-5,6-bis(trifluoromethyl)bicyclo[2.2.1]hept-2-ene, 5.5.6-trifluoro-6-trifluoromethoxybicyclo[2.2.1]hept-2- Alkene, 5.5.6-trifluoro-6-heptafluoropropoxybicyclo[2·2·1]hept-2-ene, 8-fluorotetracyclo[4.4.0· 12'5·17'1()] 3-dodecene, 8-fluoromethyltetracyclo[4.4.0· 12,5·17,1()]-3-dodecene, 8-difluoromethyltetracycline [4.4.0·12 '5.17'1()]-3-dodecene, 8-trifluoromethyltetracyclo[4.4.0. 12,5·17,1()]-3-dodecene, 8-pentafluoroethyl Tetracycline [4.4.0. 12, 5.17'1()]-3-dodecene 8,8-difluorotetracyclo[4.4.0. 12'5.17'1()]-3-dodecene, - 11 - 200825479 8,9-Difluorotetracyclo[4.4.0. 12'5.17'1()]-3-dodecene, 8.8-bis(trifluoromethyl)tetracyclo[4·4·0· 12 ,5·Γ,1()]-3-dodecene 8.9-bis(trifluoromethyl)tetracyclo[4·4·0. 12,5·Γ,1()]-3-dodecene 8 -methyl-8-trifluoromethyltetracyclo[4.4.0. 12,5·Γ,1()]-3·dodecene, 8.8.9-trifluorotetracycline [4.4.0· 12,5 ·Γ,1()]-3-dodecene, 8.8.9-tris(trifluoromethyl)tetracyclo[4.4.0 · 12,5.17,1()]-3-dodecene 8.8.9.9-tetrafluorotetracyclo[4.4.0.l2'5.l7JG]-3-dodecene, 8.8.9.9- four (trifluoro Methyl)tetracyclo[4.4.0.12, 5.17,1()]-3-dodecene, 8.8-difluoro-9,9-bis(trifluoromethyl)tetracyclo[4.4.0.12, 5.17,1 ( )]-3-dodecene, 8.9-difluoro-8,9-bis(trifluoromethyl)tetracyclo[4.4.0· I2,5"7,10]- 3 -dodecene, 8.8.9 - trifluoro-9-trifluoromethyltetracyclo[4.4.0.12,5.17,1()]-3-dodecene, 8.8.9-trifluoro-9-trifluoromethoxytetracyclo[4.4.0.12 , 5.17,1()]-3-dodecene, 8.8.9-trifluoro-9-pentafluoropropoxytetracyclo[4.4.0.12,5.17,1()]-3-dodecene, 8- Fluorine-8-pentafluoroethyl-9,9-bis(trifluoromethyl)tetracyclo[4.4.0·1 2,5 · 1 7 51 G ] - 3 -dodecene, -12- 200825479 8, 9-Difluoro-8-heptafluoroisopropyl-9-trifluoromethyltetracyclo[4.4.0. 1 2,5 · Γ 51G ] - 3 -dodecene, 8-chloro-8,9,9 -Trifluorotetracyclo[4·4·0· 12'5·Γ,1()]-3-dodecene, 8,9-dichloro-8,9-bis(trifluoromethyl)tetracyclo[ 4.4.0. 12,5.17,10]- 3 -dodecene, 8-(2,2,2-trifluoroethoxycarbonyl)tetracyclo[4.4.0.12,5_17,1()]-3-ten Diene, 8-methyl-8-( 2 2,2-trifluoro-ethoxycarbonyl) tetracyclo [4.4.0 · 1 2 '5 · 1 7' 1G] - 3 - dodecene and the like. These may be used alone or in combination of two or more. Preferably, in the above specific formula (1), R1 and R3 are a hydrogen atom or a carbon number of 1 to 1 Torr, more preferably 1 to 4, particularly preferably a hydrocarbon group of 1 to 2, R2 and R4. In the hydrogen atom or a monovalent organic group, at least one of R2 and R4 represents a hydrogen atom and a polar group other than a hydrocarbon group, m is an integer of 0 to 3, and P is an integer of 〇3, preferably m. + p = 0 to 4, more preferably 0 to 2, especially preferably m = l, p = 0. The specific monomer having m = l and p = 0 is preferable in that the obtained cyclic olefin resin has a high glass transition temperature and excellent mechanical strength. The polar group of the specific monomer may, for example, be a carboxyl group, a hydroxyl group, an alkoxycarbonyl group, an allyloxycarbonyl group, an amine group, a decylamino group, a cyano group or the like, and the polar groups may be bonded through a bond such as a methylene group. The base is bonded. Further, the polar group may, for example, be a hydrocarbon group having a polar divalent organic group such as a carbonyl group, an ether group, a decane ether group, a thioether group or an imine group, which is bonded to a bond group. Among these, a carboxyl group, a hydroxyl group, an alkoxycarbonyl group or an allyloxycarbonyl group is preferred from -13 to 200825479, and an alkoxycarbonyl group or an allyloxycarbonyl group is preferred. Further, at least one of R2 and R4 is a monomer having a polar group represented by the formula -(CH2)nCOOR, and the obtained cyclic olefin-based resin has a high glass transition temperature and low hygroscopicity, and is excellent in various materials. The point of adhesion is better. In the formula relating to the above specific polar group, R is a hydrocarbon group having 1 to 12 carbon atoms, more preferably 1 to 4, particularly preferably 1 to 2, preferably an alkyl group. Further, η is usually 0 to 5, and the smaller the η is, the higher the glass transition temperature of the obtained cyclic olefin resin is, and the specific monomer having η of 0 is preferably synthesized. . Further, in the above general formula (1), R1 or R3 is preferably an alkyl group, an alkyl group having 1 to 4 carbon atoms, more preferably an alkyl group having 1 to 2, particularly preferably a methyl group, especially, the alkane. When the base is bonded to the same carbon atom as the carbon atom to which the specific polar group represented by the above formula (CH2) nCOOR is bonded, the hygroscopicity of the obtained cyclic olefin resin can be preferably reduced. &lt;Copolymerizable monomer&gt; Specific examples of the copolymerizable monomer include cycloolefins such as cyclobutene, cyclopentene, cycloheptene, cyclooctene, and dicyclopentadiene. The carbon number of the hydrocarbon storage ring is preferably from 4 to 20, and more preferably from 5 to 12. These may be used alone or in combination of two or more. The proper use range of the specific monomer/copolymerizable monomer is from 100/0 to 50/5 0, more preferably from 100/0 to 60/40. -14- 200825479 &lt; Ring-opening polymerization catalyst&gt; In the present invention, 'in order to obtain (1) a ring-opening polymer of a specific monomer, and (2) a ring-opening polymerization reaction of a ring-opening copolymer of a specific monomer and a copolymerizable monomer, It can be carried out in the presence of a metathesis catalyst. The metathesis catalyst is characterized in that (a) is at least one selected from the group consisting of W, Mo and Re, and (b) is a Group IA element of the periodic table (eg, Li, Na, K, etc.), a Group IIA element ( For example, Mg, Ca, etc.), lanthanum elements (eg, ηη, Cd, Hg, etc.), group 111A elements (eg, b, A1, etc.), group IVA elements (eg, Si, Sn, Pb, etc.), or ivb The compound of the element (for example, Ti, Zr, etc.) is selected from a catalyst having at least one combination of at least one of the element-carbon bond or the element-hydrogen bond. Further, in this case, in order to increase the activity of the catalyst, it is also possible to add the additive (c) described later. (a) The representative example of the compound of W, Mo or Re, which is a suitable example of the compound of W, Mo or Re, may be exemplified by WC16, MoCU, ReOCh, etc., JP-A-1-132626, page 8 of the lower left column, line 6 to page 8, upper right column The compound described in the 17th line. Specific examples of the component (b) include n-C4H9Li, (C2H5) 3A1, (C2H5) 2A1CM, (C2H5), 5AlCh.5, (C2H5) A1C12, methylalmoxane, LiH, etc., Japanese Patent Publication No. 132626626 On page 8 of the bulletin, the compound described in the third line on the right is blocked from line 18 to page 8 on the third line of the lower right column. As a representative example of the component (c) of the additive, the alcohols such as aldehydes, ketones, amines, and the like can be suitably used, and further, Japanese Patent Publication No. _-15-200825479 132626, page 8 Line 16 ~ compound shown on line 17 in the upper left column of page 9. In terms of the amount of the metathesis catalyst to be used, the molar ratio of the component (a) to the specific monomer "(a) component: specific monomer" is usually in the range of 1:5 00 to 1:50,000, preferably 1:1,000~1:1 0,000 range. The ratio of the component (a) to the component (b) is in the range of the metal atomic ratio (a): (b) of 1:1 to 1:50, preferably 1:2 to 1:30. The ratio of the component (a) to the component (c) is in the range of 0.005:1 to 15:1, preferably 0.05:1 to 7:1, in terms of molar ratio (c):(a). &lt;Solvent for Polymerization&gt; The solvent (the solvent constituting the molecular weight modifier solution, the solvent of the specific monomer and/or the metathesis catalyst) used in the ring-opening polymerization reaction, for example, pentane, hexane, and heptane Alkane such as alkane, octane, decane or decane, cycloalkane such as cyclohexane, cycloheptane, cyclooctane, decahydronaphthalene or norguanidine, benzene, toluene, xylene, ethyl An aromatic hydrocarbon such as benzene or cumene, chlorobutane, bromohexane, dichloromethane, dichloroethane, hexamethylene dibromide, chlorobenzene, chloroform, tetrachloroethylene, etc., halogenated alkane, halogenated aromatic Compounds such as ethyl acetate, n-butyl acetate, isobutyl acetate, saturated carboxylic acid esters such as methyl propionate, dimethoxyethane, etc., dibutyl ether, tetrahydrofuran, dimethoxy An ether or the like of an alkane or the like, which may be used singly or in combination. Among these, aromatic hydrocarbons are preferred. In terms of the amount of the solvent used, "solvent: specific monomer (weight ratio)" is usually 1:1 to 10:1, preferably 1:1 to 5:1. -16- 200825479 <Molecular weight modifier> The molecular weight adjustment degree of the obtained ring-opening (co)polymer is 'the type of the catalyst, and the kind of the solvent. However, the molecular weight modifier is coexisted in the reaction system to adjust it. In terms of a molecular weight modifier, an α-olefin such as propylene, 1-butene, 1-pentene, iota-hexene, 1-heptene, 1-decene, and styrene, such 1-hexene Very good. The molecular weight modifiers may be used alone or in combination with the molecular weight modifier, in an amount of from 0.005 to 0.6 mol per mole of the specific monomer. (2) in order to obtain a ring-opening copolymer, a ring-opening copolymerization of a specific monomer and a copolymerizable monomer in a ring-opening polymerization, a polyconjugated di(tetra) compound such as a polyisoprene, a phenethyl group; - A non-conjugated diene copolymer, a main chain of a polynordenyl group, may be subjected to ring-opening polymerization of a specific monomer in the presence of two or more carbon-carbon intermetallic bonds. The ring-opening (co)polymer obtained in the above manner can be further useful by hydrogenating the (3) hydrogenated (co)polymerized resin. i ' is based on the polymerization temperature: in the invention, it can be exemplified by, for example, ethylene, hydrazine, 1-octene, 1-indene, 1-butene, or more than two kinds, and is used in combination with ring-opening polymerization. Preferably, it is 0.02~ in the step, and the polybutadiene-butadiene copolymer (norbornene) or the like and the hydrocarbon-based polymer can be used as the impact resistance -17- 200825479 &lt;Hydrogenation Catalyst&gt; The hydrogenation reaction is carried out by a usual method, that is, a hydrogenation catalyst is added to a solution of a ring-opening polymer, which is a hydrogen gas at a pressure of 3,000 to 300 atmospheres, preferably 3 to 200 atmospheres. For the hydrogenation catalyst of 烯烃~200 ° C, preferably at 20 to 180 ° C, it is possible to use a hydrogenation reaction of a usual olefinic compound. As the hydrogenation catalyst, a heterogeneous catalyst and a homogeneous catalyst can be exemplified. The heterogeneous catalyst may, for example, be a solid catalyst in which a noble metal catalyst such as palladium, platinum, nickel, rhodium or ruthenium is supported on a carrier such as carbon, silica sand, alumina or titania. Further, in terms of a homogeneous catalyst, a naphthenic acid, a nickel/triethylamine, an ethyl acetylacetinyl nickel/triethylaluminum, a cobalt octoate/n-butyllithium, and a second Titanocene / titanylene, barium acetate, tris(triphenylphosphine) ruthenium, dichlorotris(triphenylphosphine) ruthenium, chlorohydrocarbonyl tris(triphenylphosphine)钌, dichlorocarbonyl tris(triphenylphosphine) ruthenium and the like. The form of the catalyst may be either a powder or a granule. These hydrogenation catalysts are used in a ring-opening (co)polymer: hydrogenation catalyst (weight ratio) at a ratio of 1:1 X 1 0_6 to 1:2. As a result, the hydrogenated (co)polymer obtained by hydrogenation has excellent thermal stability, and its properties are not deteriorated even during molding or heating as a product. Here, the hydrogenation rate is usually 50% or more, preferably 70% or more, more preferably 90% or more, and particularly preferably 99% or more. Further, the hydrogenation ratio of the hydrogenated (co)polymer is 50% or more, preferably 90% or more, more preferably 99% or more, as measured by NMR at 500 MHz and 'H--18-200825479 NMR. The higher the hydrogenation rate, the more excellent the stability against light, and the stable shape can be obtained over a long period of time as a wavelength plate of the present invention. In addition, the co-polymer used as the cyclic olefin resin of the present invention is preferably contained in the hydrogenated (co)polymer in an amount of not more than 1% by weight, more preferably 1% by weight or less. Further, in the case of the cyclic olefin-based resin of the present invention, after the ring-opening (co)polymer of (4 (1) or (2) is cyclized by a Friedel Kraft, hydrogenated ( Co)polymer. &lt;Cyclone-induced cyclization) The method of cyclization of the ring-opening (co)polymer of (1) or (2) by the Frent reaction is not particularly limited. In the case of the known acidic compound using an acidic compound described in the publication of the Japanese Patent Publication No. 99-99, it is possible to use an acid such as A1C13, bf3, Ah3, HC1, CH2C1CO0H, zeolite or activated clay, and Bronsted. De acid. The ring-opened (co)polymer which is cyclized is hydrogenated in the same manner as the (1) or (2) (co)polymer. Further, as the ring-shaped smear-based resin of the present invention, 'the same may be constant." The saturated copolymerization of the above specific monomer and the unsaturated double bond-containing compound 1 &lt;Unsaturated double bond compound> 98% of the heat or the use of hydrogenation (amount of 5) The above reaction is carried out in the Dequaf. For the opening of the FeCl3 Lewis (5-19-200825479, the unsaturated double bond compound may, for example, be ethylene 'propylene, butene, etc., preferably has a carbon number of 2 to 12, more preferably a carbon number. The olefin-based compound of 2 to 8. The specific use range of the specific monomer/unsaturated double bond compound is 90/10 to 40/60, more preferably 85/15 to 50/50 by weight. In order to obtain (5) a saturated copolymer of a specific monomer and an unsaturated double bond-containing compound, a usual addition polymerization method can be used. &lt;Addition polymerization catalyst&gt; As the catalyst for synthesizing the above (5) saturated copolymer, at least one selected from the group consisting of a titanium compound, a zirconium compound and a vanadium compound, and an organoaluminum compound as a co-catalyst can be used. Here, the titanium compound may, for example, be titanium tetrachloride or titanium trichloride, and the chromium compound may, for example, be bis(cyclopentadienyl) chloride or dichlorobis(cyclopentadienyl) chromium. . Further, as the vanadium compound, the general formula VO(OR)aXb, or V(OR)cXd can be used [however, R is a hydrocarbon group, X is a halogen atom, 0$ag3, 0Sb'3, 2^( a + b ) $3 , 0$c$4, 0SdS4, 3$ (c + d) ]. A vanadium compound as shown, or such an electron donating additive. The above electron donor may, for example, be an oxygen-containing electron donor such as an alcohol, a phenol, a ketone, an aldehyde, a carboxylic acid, an organic or inorganic acid ester, an ether, a decylamine, an acid anhydride or an alkoxydecane, or an ammonia. A nitrogen-containing electron donor such as an amine, a nitrile or an isocyanate. Further, as the organoaluminum compound as a catalyst, at least one selected from the group consisting of at least one aluminum-carbon bond or aluminum-hydrogen bond may be used. In the above, for example, in the case of using a vanadium compound, the ratio of the vanadium compound to the organoaluminum compound to the aluminum atom of the vanadium atom (A 1 /V ) is 2 or more, preferably 2 to 50, and particularly preferably 3 ~20 range. The solvent used for the polymerization reaction in the addition polymerization can be used in the same manner as the solvent used in the ring-opening polymerization reaction. Further, in order to adjust the molecular weight of the obtained (5) saturated copolymer, hydrogen can be usually used. Further, as the cyclic olefin resin of the present invention, (6) addition molding of one or more monomers selected from the above specific monomers and ethylene-based cyclic hydrocarbon monomers or cyclopentadiene monomers can be used. Copolymers and hydrogenated copolymers thereof. &lt;Ethylene-based cyclic hydrocarbon-based monomer&gt; The ethylene-based cyclic hydrocarbon-based monomer may, for example, be ethylene such as 4-vinylcyclopentene or 2-methyl-4-isopropenylcyclopentene. An ethyleneated 5-membered cyclic hydrocarbon monomer such as a cyclopentene monomer, an ethylene cyclopentane monomer such as 4-vinylcyclopentane or 4-isopropenylcyclopentane, or 4-vinylcyclohexene. 4-isopropenylcyclohexene, 1-methyl-4-isopropenylcyclohexene, 2-methyl-4-ethenecyclohexene, 2-methyl-4-isopropenylcyclohexene, etc. Ethylene cyclohexene monomer, ethylene cyclohexane monomer such as 4-vinylcyclohexane or 2-methyl-4-isopropenylcyclohexane, styrene, α-methylstyrene, 2 - Methylstyrene, 3-methylstyrene, 4-methylstyrene, 1-vinylnaphthalene, 2-vinylnaphthalene, 4-phenylstyrene, K-inch, , d-post (terpene), 1 - flammable, bis-ene, d-lemon, 1 - limonene, dipentane, etc. -21 - 200825479 olefinic monomer, 4-vinylcycloheptene, 4 Ethylene cycloheptene monomer such as isopropenylcycloheptene, 4·ethene cycloheptane, 4-isopropenylcycloheptane The vinyl-based monomer cycloheptane and the like. Preferred is ethylene, α-methylstyrene. These may be used alone or in combination of two or more. &lt;Cyclopentadiene-based monomer&gt; The cyclopentadiene-based monomer which can be used for the monomer of the (6) addition copolymer of the present invention may be, for example, cyclopentadiene or methylcyclopentane. 2_methylcyclopentadiene, 2-ethylcyclopentadiene, 5-methylcyclopentadiene, 5,5-methylcyclopentadiene, and the like. Preferred is cyclopentadiene. These may be used alone or in combination of two or more. The addition (co)polymer selected from the above specific monomers, one or more monomers of a vinyl cyclic hydrocarbon monomer and a cyclopentadiene monomer, and the above (5) specific monomer and A saturated copolymer of a saturated double bond compound is obtained by the same addition polymerization method. Further, the hydrogenated (co)polymer of the above-mentioned addition (co)polymer can be obtained by the same hydrogenation method as the hydrogenated (co)polymer of the above (3) ring-opened (co)polymer. Further, in the case of the cyclic olefin resin of the present invention, (7) an interactive copolymer of the above specific monomer and acrylate can be used. &lt;Acrylate&gt; (7) The above-mentioned specific monomer and acrylate copolymerization -22-200825479 For the manufacture of acrylate, for example, methacrylate, 2-ethylhexylacrylic acid a carbon atom such as a linear or branched alkyl or acrylate such as an ester or a cyclohexyl acrylate having a carbon number of 2 Å, a branched or cyclic alkyl acrylate, a glycidyl propyl group: a phthalic acid ester or a 2-tetrahydrofurfuryl acrylate. The aromatic ring-containing propionate having a carbon number of 6 to 20, such as a heterocyclic acrylate or a benzyl acrylate, having 2 to 20, having an aromatic ring group, a decyl acrylate or a dipentyl acrylate, has a carbon number of 7 Polyacrylate of ~30 ring structure. In the present invention, in order to obtain (7) a cross-copolymer of the specific monomer and the acrylate, when the total of the specific monomer and the acrylate is 1 Torr in the presence of Lewis acid, usually, The specific monomer is 30 to 70 moles, the acrylate is 70 to 30 moles, preferably 40 to 60 moles of the specific monomer, and 60 to 40 moles of the acrylate, particularly preferably the above specific The monomer is subjected to radical polymerization at a ratio of 45 to 55 moles and a propionate of 55 to 45 moles. The amount of the Lewis acid used to obtain (7) the above-mentioned specific copolymer of the monomer and the acrylate is 0.001 to 1 mole per 100 moles of the acrylate. Further, an organic peroxide or a azobis-based radical polymerization initiator which is known to cause radical generation can be used, and the polymerization temperature is usually - 20 ° C to 80 ° C, preferably 5 ° C. 60. Further, in the solvent for the polymerization reaction, the same solvent as that used in the ring-opening polymerization reaction can be used. Further, the term "interactive copolymer" in the present invention means that the structural unit derived from the above specific monomer is not adjacent. That is, the adjacent structural unit from the above specific monomer must be a copolymer having a structure derived from the structural unit of acrylate -23-200825479, and the structural units derived from the acrylate are adjacent to each other. The structure of the present invention cannot be denied. The proper molecular weight of the cyclic olefin resin used in the present invention has an intrinsic viscosity [π]inh of 0.2 to 5 dl/g, more preferably 0.3 to 3 dl/g, and particularly preferably 0.4 to 1.5. Dl/g, dissolved in tetrahydrofuran, the polystyrene-equivalent number average molecular weight (?n) measured by gel permeation chromatography (GPC) is 8,000 to 100,000, more preferably 10,000 to 80,000, particularly preferably 12,000 to 50,000, weight The average molecular weight (Mw) is preferably from 20,000 to 300,000, more preferably from 30,000 to 250,000, particularly preferably from 40,000 to 200,000. Further, the molecular weight distribution (Mn/Mw) is preferably from 2.0 to 4.0, more preferably Preferably, it is 2.5 to 3.7, and particularly preferably 2.8 to 3.5. By using a resin having a small molecular weight distribution, a film having a small measurement deviation of MFR can be obtained. Intrinsic viscosity [7?] inh, number average molecular weight and weight average molecular weight are in the above range Further, the heat resistance, water resistance, chemical resistance, and mechanical properties of the cyclic olefin resin can be improved from the moldability of the optical film of the present invention. The glass transition of the cyclic olefin resin used in the present invention The temperature (Tg) is usually 1 l 〇 ° C or higher, preferably 1 1 〇 to 350 ° C, more preferably 120 to 25 0 ° C, particularly preferably 120 to 200 ° C. Tg is less than 1 10 In the case of °C, it is not suitable for use under high temperature conditions or secondary processing due to coating film, printing, etc. On the other hand, when the Tg exceeds 350 ° C, the forming process becomes difficult and the forming process is difficult. In addition, the possibility of deterioration of the resin due to heat is increased. In addition, the cyclic olefin resin used in the optical film of the present invention, -24-200825479, is such that the measurement deviation of the obtained optical film MFR is small, so that the resin itself MFR It is preferred that the measurement deviation is small. In general, a resin having a small molecular weight distribution is preferably obtained. In order to obtain a resin having a small molecular weight distribution, the compound represented by the above general formula (1) and a catalyst component are separated into two or more stages to carry out ring-opening polymerization. In addition, in the case of the ring-opening (co)polymerization of the above (1) or (2), the multistage polymerization system allows the polymerization tanks to be arranged in series, and the monomer is supplied in the polymerization tank. After the component and the catalyst component, a portion of the polymerized monomer component and the polymer component and the catalyst component are supplied in a continuous or batchwise polymerization tank in a second stage after a certain period of time. In the polymerization tank of the next stage, while supplying the above components, a new monomer component and a catalyst component are supplied, and further polymerization is carried out, and the mixed liquid component is supplied to the polymerization tank in the next stage. Similarly to the second stage, the polymerization may be carried out in the polymerization tank of the third stage. By this method, the conversion ratio to the polymer is at least 80% or more, preferably 85% or more, more preferably 88. More than %, the best method is more than 90%. Further, in the case of the addition (co)polymerization of the above (5) to (7), the multistage polymerization may be carried out in accordance with the above ring-opening polymerization. In the above-mentioned cyclic olefin-based resin, the specific hydrocarbon-based resin described in JP-A No. Hei 9-22 1 577, and JP-A No. Hei. Or known thermoplastic resins, thermoplastic elastomers, rubbery polymers, organic fine particles, inorganic fine particles, and the like. Further, in the cyclic olefin-based resin to be used in the present invention, an additive such as a known antioxidant or an ultraviolet absorber can be added to improve the heat deterioration resistance or the light resistance without impairing the effects of the invention of the present invention. For example, at least one compound selected from the group consisting of a phenol-based compound, a thiol-based compound, a sulfide-based compound, a disulfide-based compound, and a phosphorus-based compound is added to the cyclic olefin-based resin 1 of the present invention. When 0 parts by weight is added in an amount of 0.01 to 10 parts by weight, heat deterioration resistance can be improved. The optical film formed of the cyclic olefin of the present invention may be added with the following additives. However, since the amount of addition can change the MFR, the amount thereof is controlled. In particular, in the case where the resin pellets and the additive are continuously mixed and formed in an extruder at the time of molding, the measurement variation of the additive amount is preferably within 5% of the soil. Phenol-based compound: In the case of a phenol-based compound, triethylene glycol-bis[3-(3-tris-butyl-5-methyl-4-hydroxyphenyl)propionate], i,6-hexyl Alkanediol-bis[3-(3,5-di-tris-butyl-4-phenylphenyl)propionate], 2,4-bis-(n-octylthio)-6- (4 -hydroxy-3,5-di-tertiary butylanilino)-3,5-three wells, pentaerythritol-four [3-(3,5-di-tri-butyl-4-hydroxyl) Phenyl)propionate], 2,2-thio-divinylbis[3-(3,5-di-tri-butyl-4-hydroxyphenyl)propionate], octadecyl-3- (3,5-di-tri-butyl-4-hydroxyphenyl)propionate], N,N-hexylene bis(3,5-di-tertiary butyl-4-hydroxy-hydrocinnamylamine (cinnamamide) ), ι, 3,5-trimethyl-2,4,6-tris(3,5-di-tri-butyl-4-hydroxybenzyl)benzene, three-(3,5- Di-tertiary butyl-4-hydroxybenzyl)-trimeric isocyanate, 3,9-bis[2-[ 3-( 3-tri-26-200825479 butyl-4-yl-5-methyl) Phenyl)propionyloxy]dimethylethyl b 2,4,8, 10-tetraoxaspiro[5.5]undecane, and the like. Preferred is octadecyl-3-(3,5-di-tri-butyl-4-hydroxyphenyl)propionate), :1,3,5-trimethyl-2,4,6-tri (3,5-di-tertiary butyl-4-hydroxybenzyl)benzene, neopentyl alcohol-tetra[3 ·( 3,5 -di-tert-butyl-4-hydroxyphenyl)propane a thiol compound such as an acid ester, particularly preferably an octadecyl-3-(3,5-di-tri-butyl-4-hydroxyphenyl)propionate: a thiol compound can be exemplified Alkyl mercaptan such as tertiary dodecyl mercaptan or hexyl mercaptan, 2-hydrothiobenzimidazole, 2-hydrothio-6-methylbenzimidazole, 1-methyl-2-(methyl Benzoimidazole, thiophanyl-methylbenzimidazole, 2-hydrothio-4-methylbenzimidazole, 2-hydrothio- 5-methylbenzimidazole, 2-hydrogen sulfide 5-,6-dimethylbenzimidazole, 2-(methylhydrothio)benzimidazole, 1-methyl-2-(methylhydrothio)benzimidazole, 2-hydrogenthio- 1,3 - dimethylbenzimidazole, thioacetic acid, and the like. Sulfide compound: In terms of a sulfide compound, 2,2-thio-divinyl bis[3-(3,5---di-butyl-4-cyclophenyl)propanoic acid], 2,2-thiobis(4methyl-6-tertiary butylphenol), 2,4-bis(n-octylthiomethyl)-6-methylphenol, dilauryl 3,3,-thio Dipropionate, dimyristyl 3,3'-thiodipropionate, distearyl 3,3, thiodipropionate, neopentyl alcohol 4 (3_lauryl) Thiopropionate), ditridecyl 3,3,-sulfur-27- 200825479 dipropionate, and the like. Examples of the disulfide-based compound include bis(4-chlorophenyl)disulfide, bis(2-chlorophenyl)disulfide, bis(2,5-dichlorophenyl)disulfide, and double (2,4,6-trichlorophenyl)disulfide, bis(2-nitrophenyl)disulfide, ethyl 2,2'-dithiodibenzoate, bis(4-ethyl fluorenyl) Phenyl) disulfide, bis(4-aminomethylphenyl) disulfide, 1,1'-dinaphthyl disulfide, 2,2 '-dinaphthyl disulfide, 1,2 ^ Dinaphthyl disulfide, 2,2'-bis(1-chlorodinaphthyl) disulfide, 1, fluorene-bis(2·chloronaphthyl) disulfide, 2,2'-bis (1- Phosphate compounds such as cyanonaphthalenyl) disulfide, 2,2'-bis(1-ethenylnaphthyl) disulfide, dilauryl-3,3'-thiodipropionate: phosphorus compound In terms of tris(4-methoxy-3,5-diphenyl)phosphite, tris(nonylphenyl)phosphite, tris(2,4-di-tert-butylphenyl) Phosphite, bis(2,6-di-tert-butyl-4-methylphenyl)isopentyl alcohol diphosphite, bis(2,4-di-tertiary butylphenyl) new Pentaerythritol diphosphorus Esters and the like. Further, a diphenyl ketone compound such as 2,4-dihydroxydiphenyl ketone or 2-hydroxy-4-methoxydiphenyl ketone or fluorene-(benzyloxycarbonyloxy)benzotriazole or the like is used. a benzotriazole-based compound, or a oxalic acid-based compound such as 2-ethylglyoxime or 2-ethyl-2'-ethoxyxantanilide, in a ring form - 28-200825479 When 100 parts by weight of the olefin resin is added in an amount of 0.01 to 3 parts by weight, preferably 0.05 to 2 parts by weight, light resistance can be improved. Further, in the case where the cyclic olefin resin according to the present invention is formed by melt extrusion on a film or the like, the thermal history during melt extrusion can prevent thermal deterioration of the resin. Add antioxidants. Specific examples of the above antioxidant include, for example, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tri-butyl-4-hydroxybenzyl)benzene, 11^- Hexahexyl bis(3,5-di-tert-butyl-4-hydroxy-hydrocinnacin), three-(3,5-di-tri-butyl-4-hydroxybenzyl)- Isocyanate, tris(2,4-di-tert-butylphenyl)phosphoric acid, etc., but the present invention is not limited thereto, and, in addition, there is a Tg of a cyclically olefin-based resin which is melt-extruded. There is an uncomfortable situation. Further, these may be used in combination or may be used alone without departing from the scope of the effects of the present invention. The amount of the antioxidant added is usually 0.01 to 5 parts by weight, preferably 0.05 to 4 parts by weight, more preferably 0.1 to 1.5 parts by weight, based on 1 part by weight of the cyclic olefin resin. When the amount of the antioxidant added is less than 0.01 part by weight, the resin is liable to gel at the time of extrusion processing, and as a result, it is not recognized as a defect on the resulting film. On the other hand, when the dosage is more than 5 parts by weight, the occurrence of eye mucus may occur during processing, and the scale may become a die line, a fish eye on the film, burnt, or the like. The reason is not good. Such an antioxidant can be added at the time of producing a cyclic olefin resin, and can be simultaneously blended with the particles of the cyclic olefin resin at the time of melt extrusion. -29-200825479 In the case where the cyclic olefin resin of the present invention is formed by melt extrusion, a lubricant, a UV absorber, a dye, a pigment, or the like may be used insofar as the effects of the present invention are not impaired. Additives other than antioxidants. Of course, in this case, in the case of an additive having a melting point, the melting point thereof is preferably in the range of the melting point of the essential antioxidant of the present invention. "Methods of Manufacturing Optical Films" &lt;Method of obtaining a resin having a small MFR measurement deviation) The cyclic olefin resin used in the optical film of the present invention preferably has a small variation in measurement of the MFR of the resin itself when the measurement variation of the obtained optical film MFR is small. . In the method of obtaining a resin having a small measurement deviation of MFR, the following two methods can be exemplified as appropriate. (i) A method in which a plurality of cyclic olefin resins having the same composition and different average molecular weights are mixed and adjusted so that the average molecular weight of the resin supplied to the molding machine is constant and the particles are formed, and the optical film is formed by using the particles. For example, in a plurality of tanks, a resin solution having a different average molecular weight is stored, and the intrinsic viscosity of each resin is measured in advance, and the intrinsic viscosity of the target resin of the mixed resin is determined, and the resin solution is mixed at a mixing ratio of the target crucible. The mixed resin solution is formed into pellets. For the molding method, for example, a method of forming together with a solvent removal using an extrusion molding machine using a multi-stage aeration method is preferred. The resin having a different average molecular weight is mixed in an extruder, preferably a resin blender is preferably used in a mixer, and a mixer such as a Henschel -30-200825479 mixer is preferred. If it is heated and melted by a bumbury mixer or the like, it is considered to be oxidatively degraded, so it can be used under conditions of no oxidation. (Π) A method in which an optical film is formed by mixing a plurality of cyclic olefin-based resins having the same composition and having different average molecular weights, and adjusting the average molecular weight of the resin supplied to the molding machine to be constant. Preferably, the mixed resin solution is adjusted in the same manner as in the above (i), and a multi-stage aeration type extrusion molding machine is used together with the solvent removal to form a film shape. In such a method, when a film is formed by using a resin of a plurality of polymerization batches, the measurement deviation of MFR caused by each batch can be alleviated, which is a very effective means. &lt;Film Forming&gt; In the method of molding the cyclic olefin-based resin film, there are a solvent casting method (flow casting method), a melt extrusion method, or the like, and a melt extrusion method is used for the production cost surface. good. The method for obtaining a cyclic olefin-based resin film by a melt extrusion method is not particularly limited, and a known method can be applied. For example, a method in which a cyclic olefin-based resin in a molten state is pressed from a die attached to an extruder to press the resin against the surface of the mirror roll, and then cooled and peeled off to form a sheet is obtained. In this case, the resin obtained by the above method (i) may be used, or the pellet obtained by the above (Π) method may be used, or the method of the above (ii) may be used for extrusion molding by mixing the resin in an extruder. A film with a small measurement deviation of -31 - 200825479 MFR is available. The method of cooling and thinning the film extruded from the mold includes a nip roll method, an electrostatic addition method, an air knife method, a calendering method, a single-sided belt method, a double-sided belt method, and a three-roll method. In order to manufacture a sheet having few optical distortions, a single-sided tape type can be used, and a sheet manufacturing apparatus called a sleeve type, an electrostatic application method, and the like are preferable. For example, a mirror roll and a metal strip are disposed under the discharge port of the mold, and a film-making apparatus in which the peeling roll is disposed in parallel with the mirror roll is disposed. The above-mentioned metal belt is held in a state in which tension is applied by two holding rolls provided in contact with the inner surface thereof. The resin discharged from the discharge port is pressed between the mirror roll and the metal belt, transferred to a mirror roll, cooled, and then peeled off by a peeling roll to form a film. Further, at the positions of both ends of the discharged film, the self-charged electrode is disposed under the discharge port of the mold with respect to the mirror roll, and the film is attached to the mirror roll side without optical deformation to make the surface of the film. It is also an appropriate method to become a good method. As the extruder, any one of a single shaft, a two shaft, a planetary type, a co-kneader or the like can be used, and a single shaft extruder is preferably used. Further, in terms of the spiral shape of the extruder, a vent type, a sub flight type, a front end with a squeegee type (dulmage type), a full flight type, etc., and a compression ratio can be used. The object, the small object, the compression portion having a long length, the short compression type, and the short compression type, etc., can be easily gelled in the resin by the mixing of oxygen and the shearing heat inside the extruder. This gel is a cause of spot-like defects or charring in the film, so it can suppress the dissolution of oxygen, and it can suppress the flight of the cut heat. (flight) -32- 200825479 Shape and compression type Preferably, the appropriate compression ratio is 1. 5 to 4.5, and particularly preferably 1 · 8 to 3 · 6. For gear pumps for resin metering, either internal lubrication or external lubrication can be used, with external lubrication being preferred. The filter used for the filtration of the foreign matter may, for example, be a leaf desk type, a candle filter type, a leaf type, a screen mesh or the like. Among them, in the purpose of reducing the residence time distribution of the resin, the leaf desk type is optimal, and the nominal opening of the mesh opening of the filter is 20 μm or less, preferably ΙΟμπι. Hereinafter, it is more preferably 5 μmη or less. It is preferably 3 μπι or less. When the nominal opening is larger than 20 μπι, in addition to the foreign matter visible in the eye, it is difficult to remove the gel or the like, so that it is not preferable in terms of producing a filter for an optical film. In terms of the mold, it is necessary to make the resin flow inside the mold uniform, and in order to maintain the uniformity of the thickness of the film, it is necessary that the pressure distribution inside the mold near the die exit is constant in the width direction. In terms of satisfying such conditions, a manifold mold, a fish tail mold, a coat hanger mold, etc., among which a hanger mold is preferred. In addition, the flow rate adjustment of the mold is preferably performed using a bending lip type. In addition, it is better to have a model with automatic control due to the heat bolt to perform the function of thickness adjustment. In order to adjust the flow rate, a choke bar is installed, or a lip block for thickness adjustment is installed, and a height difference is generated in the mounting portion, or air is intruded in the gap of the mounting portion. It is also a cause of scorching, which is also a cause of becoming a mold line. Die discharge, ultra-hard coating such as tungsten carbide, etc. -33- 200825479 It is better to be coated. Further, the material of the mold may, for example, be SCM-based steel, S U S or the like, but is not limited thereto. In addition, a person who forms a film such as chromium, nickel, or titanium on the surface, and a film such as TiN, TiAIN, TiC, CrN, and DLC (diamond-like carbon) by a PVD (Physical Vapor Deposition) method or the like can be used. For other ceramics to be flame sprayed, the surface is nitrided, etc. Since such a mold has a high surface hardness and a small friction with the resin, it is preferable that the obtained transparent resin sheet can prevent the incorporation of burnt dust or the like while preventing the occurrence of the mold line. The mirror roll is preferably one having a heating means and a cooling means inside, and the surface roughness is preferably μ 5 μηι or less, particularly preferably 0.3 μπι or less. In terms of the mirror roll, it is preferable to use electroplating for the metal roll, and it is preferable to perform chrome plating or electroless nickel plating. The method of heating the mirror roll is preferably a jacket type oil temperature adjustment method or a dielectric heating method. The heating method of the roller is not particularly limited. The temperature of the roller is in the film forming range, and the temperature difference is preferably no difference. The temperature difference in the width direction of the allowable roller is preferably within 2 ° C, more preferably within 1 ° C. . In the case of a single-sided belt type device or a sleeve type retracting device, it is preferable to use a seamless endless belt for the metal belt. In terms of the material constituting the metal strip, stainless steel, nickel, or the like can be used. Further, it is preferable to hold the holding roller of the metal belt so that the surface thereof is coated with an elastomer or the like which can have polyoxyethylene rubber or other heat resistance. The thickness of the metal strip is preferably 0.1 to 0.4 mm, and when it is less than 0.1 mm, the flexure is large, and the -34-200825479 is not directly damaged. On the other hand, when the thickness is larger than 〇4 mm, it is not preferable because it does not deform with the film during processing. A film such as the second method can be manufactured by the above apparatus. In general, before the introduction of the cyclic olefin-based resin in the extruder, the resin contained in the resin, the gas (oxygen or the like), the residual solvent, and the like are removed in advance, and the resin may be dried at a suitable temperature equal to or lower than the resin Tg. The dryer for drying is preferably an inert gas circulation dryer and vacuum dried. Further, since the moisture absorption in the hopper or the absorption of oxygen can be suppressed, it is also an appropriate method to seal the hopper with an inert gas such as nitrogen or argon or to use a vacuum hopper which can be maintained in a reduced pressure state. In the extruder cylinder, the resin is oxidized during melt extrusion to prevent gelation or the like from occurring, and it is preferably sealed by an inert gas such as nitrogen or argon. The cyclic olefin-based resin which is melted by the extruder is extruded into a sheet shape from the die discharge opening in the vertical direction. The temperature distribution of the die exit is preferably controlled within ± 1 °C because the difference in melt viscosity of the resin is reduced. Thereafter, the extruded resin is cooled by a mirror roll and a metal belt. Then, the resin transferred on the surface of the mirror roll is peeled off from the surface of the mirror roll by a peeling roll, and a sheet-like film can be produced. In the present invention, the processing temperature of the resin, that is, the set temperature of the extruder and the mold, is such that the resin having a uniform molten state can be discharged from the mold, and the resin can be suppressed from the viewpoint of suppressing deterioration of the resin. Tg + 100 ° C or more, preferably Tg + 200 ° C or less. Further, when the mirror roll and the metal are used to roll the resin, that is, the pressure at the mirror-35-200825479 surface roll transfer resin is preferably a surface pressure 〇·01~〇.8 MPa' 0.1 ~ 〇.6MPa. More preferably 〇·15 ～0.45 MPa. At this time, the circumferential speed of the mirror roll and the metal strip is preferably close. In terms of the proper range, when the peripheral speed of the mirror roll is 1.00, the peripheral speed of the metal strip is 0.95 to 1.05, particularly preferably 0.99 to 1.01. Further, in terms of the conditions at the time of film peeling, the peeling temperature Tt (°c) and the peeling stress TF (MPa) are preferably in the range of Tg-30°c STt, STg + 5〇C, and 0.01 MPaSTFS5 MPa. Here, the temperature of the mirror roll of the cooling roll is usually Tg-80 to Tg + 10 ° C, preferably Tg - 60 to Tg - 2 ° C. The horizontal portion of the flow path of the mold of the present invention should be at the front end portion of the die exit, and the horizontal portion of the front end is referred to as a die land. The length of the die is 10 to 50 mm, preferably 11 to 40 mm. &lt;Film stretching processing&gt; The optical film of the present invention is an optical film obtained by a flow casting method or a melt extrusion method as described above, and can be further stretched. In the case of the stretching processing method of this case, specifically, one of the axial stretching method or the biaxial stretching method can be exemplified. That is, there is a horizontal-axis stretching method by the stretcher method, a roll-to-roll compression stretching method, a vertical axis stretching method using two sets of rolls having different circumferences, or a combination of a horizontal one axis and a vertical one axis. Axial stretching method, stretching method by expansion method, and the like. In the case of the one-axis stretching method, the stretching speed is usually from 1 to 5,0 0 0%/min to 36 to 200825479, preferably from 50 to 1,000%/min, more preferably from 100 to 1,000%/min. It is 100~500%/min. In the case of the biaxial stretching method, there are cases in which stretching is carried out in two directions at the same time or stretching treatment in a direction different from the initial stretching direction after stretching in one axis. In this case, the angle of intersection between the two stretching axes for controlling the elliptical shape of the refractive index of the film after stretching is not particularly limited as long as it can be determined by the desired characteristics, and is usually in the range of 120 to 60 degrees. Further, the stretching speed may be the same in each stretching direction, or may be different, and is usually 1 to 5,00%/min, preferably 50 to 1,000%/min, more preferably 100 to 1,000. %/min, especially good for 100~500%/min. The stretching processing temperature is not particularly limited, and is usually Tg ± 30 ° C, preferably Tgd: 15 ° C, more preferably Tg_5 ° C to Tg + 15 °, based on the glass transition temperature Tg of the resin of the present invention. The scope of C. Within this range, occurrence of unevenness in phase difference can be suppressed, and control of the refractive index ellipsoid can be made easy. The stretching ratio is not particularly limited because it can be determined by the desired characteristics, and is usually 1.01 to 10 times, preferably 1.03 to 5 times, more preferably 1.03 to 3 times. When the draw ratio is 10 or more, the control of the phase difference becomes difficult. The stretched film can be cooled as it is, at a temperature of Tg-2 (TC~Tg for at least 10 seconds, preferably from 30 seconds to 60 minutes, more preferably from 1 minute to 60 minutes). Preferably, a stabilized retardation film having a small change in the phase difference of the transmitted light is obtained. The optical film of the present invention is added without the stretching process -37-200825479 The shrinkage ratio is in the range of 1 〇〇t: , usually 10% or less, preferably 5% or less, preferably 1% or less, and particularly preferably 0.5% or less. Further, the heating of the retardation film of the present invention is loot. : In the case of heating for 500 hours, preferably 5% or less, more preferably 3% or less, particularly preferably: in order to make the dimensional shrinkage ratio within the above range, the selection of the monomers A, B of the raw materials, by Casting is controlled. The film stretched in the above manner is controlled by pulling and imparting a phase difference, a phase difference, a temperature or a thickness of the film, etc., for example, in the case of the same degree, the stretching ratio is larger. The film has a tendency to become larger, so it is changed by pulling the light to give way. When the ratio is the same, the absolute thickness of the film before stretching tends to become large, so that it is possible to obtain a phase in the stretching processing temperature range in which the desired phase difference is imparted to the transmitted light. The stretching temperature tends to become larger. Therefore, the phase difference film obtained by stretching the retardation film which has a desired retardation by the light is stretched by the above-described method to have a phase difference of 1 ΟΟμηη or less, preferably 1 〇〇~ 20μιη, even if the thickness is thinner, it can greatly respond to the phase difference film!][(In the case of 50 hours, the best is 3% or less, and the dimensional shrinkage is more than 10%, which is usually 1 When it is added to the resin method or the stretching method of the present invention, it can be stretched to make the molecules aligned, and the stretching ratio can be stretched, and the stretching is thicker than the film before stretching, and the stretching ratio of the transmitted light is different. On the other hand, when the stretching ratio is thicker, the thickness of the film before stretching is transmitted through the phase difference of the optical phase difference, and the film is formed by the stretching temperature of the phase difference of the transmitted light. The thickness is usually: preferably 80 20 μm. It is required to be miniaturized and thinned in the field of use of the product 38-200825479. Here, in order to control the thickness of the retardation film, it is possible to control the thickness of the optical film before stretching or to control the stretching ratio. For example, 'making the optical film before stretching thinner and making the stretching ratio larger" can further reduce the thickness of the retardation film. &lt;Film Characteristics&gt; The optical film (melt extruded film, stretched film) of the present invention obtained as described above is cut into 100 mm (width direction) x 500 mm every 100 mm along the film width direction as shown in Fig. 1 ( The film of the size of the long-side direction is used as a sample, and the measurement deviation of the MFR is within ±5 %, preferably within ±2%, preferably in the case of the MFR measured at 260 ° C and 98 N load. Within 1.5%. Further, the measurement deviation of the MFR is determined by measuring on a straight line from the end portion to the end portion on the opposite side in the longitudinal direction of the film as shown in Fig. 1 . Since the measurement of the MFR is within 5% of the soil, the resin is homogeneous in the width direction. Therefore, the film thickness uniformity and the surface smoothness are excellent, and the film is free from optical refractive index unevenness and has no optical distortion. Further, the MFR of the optical film of the present invention measured under the above conditions is particularly preferably in the range of 39 to 41 g/10 min. Further, since the stretched optical film of the present invention is excellent in surface smoothness, the thickness measured in accordance with ASTM D 1 003 has a haze of 1% or less in 3 mm, preferably 〇 · 8 % or less. Further, the average roughness Ra of the film is 0·2 μηι or less, preferably -39 to 200825479 0.15 μηι or less, more preferably Ο.ίμιη or less. <<Polarizing Plate>> The polarizing plate of the present invention is at least one side of a polarizing element such as a PVA-based film. The optical film of the present invention is made of an aqueous solution mainly composed of a PVA resin. Adhesive, photocurable adhesive, etc. can be bonded together. 'It can be heated or exposed as needed, and pressed. 'The polarizing element and the optical film are bonded (laminated) to manufacture a "liquid crystal panel". The liquid crystal panel is formed by sandwiching at least one side of a liquid crystal display element formed by liquid crystal between two glass substrates, and bonding the polarizing plate of the present invention to bond (lamination) the liquid crystal display member and the polarizing plate. . [Embodiment] [Embodiment] Hereinafter, specific embodiments of the present invention will be described, but the present invention is not limited to the embodiments. In addition, the following "parts" and "%" are defined as "parts by weight" and "% by weight" unless otherwise specified. Further, in the following examples, the glass transition temperature, the total light transmittance, the haze, the in-plane retardation of the transmitted light, the transmittance and the degree of polarization of the polarizing plate, the thickness distribution of the film, and the MFR are according to the following methods. Determination. -40- 200825479 [Glass transfer temperature (Tg)] The glass transition temperature was measured under a nitrogen atmosphere at a temperature increase rate of 20 ° C /min using a differential scanning calorimeter (DSC) manufactured by Seiko Instruments. [Total Light Transmittance, Haze] The haze meter "HM-150" manufactured by Murakami Color Technology Co., Ltd. was used to measure the total light transmittance and haze. [In the in-plane phase difference (R〇) of the transmitted light] The "KOBRA-21ADH" manufactured by Oji Scientific Instruments Co., Ltd. was used to measure the in-plane phase difference (R〇) when the film light was incident vertically, at a wavelength of 50 to 50 nm. [Transmittance and Polarization of Polarizing Plate] The transmittance and polarization of the polarizing plate were measured using "RETS" manufactured by Otsuka Electronics Co., Ltd. The measurement wavelength was 550 nm. [Thin film thickness distribution] The film thickness distribution measuring device (MOCON) was used to measure in the film width direction. [Melt flow rate (MFR)] as shown in Fig. 1 cut 100 mm every 10 mm along the width direction of the film&gt;&lt;500 mm size film as a sample, measured according to JIS K7210 -41 - 200825479 at 260 °C, 98 N load MFR. &lt;Preparation Example 1&gt; 250 parts of distilled water was placed in a reaction container, and 90 parts of butyl acrylate was added to the reaction container, and 8 parts of 2-hydroxyethyl methacrylate, 2 parts of divinyl benzene, and potassium oleate were added. After one part, the stirring blade made of polytetrafluoroethylene (Teflon: registered trademark) was stirred and dispersed. Thereafter, the inside of the reaction vessel was replaced with nitrogen, and the temperature was raised to 50 ° C, and potassium persulfate was added thereto. 2 parts of the polymerization was started. Two hours after the start of the polymerization, further, after adding 1 part of potassium persulfate to the polymerization reaction system, the temperature was raised to 80 ° C, and the polymerization was continued for 1 hour to obtain a polymer dispersion. Then, the polymer dispersion was concentrated to a solid concentration of 70% using an evaporator to obtain an aqueous adhesive (adhesive having a polar group) as an aqueous dispersion of the acrylate polymer. In this way, the obtained water-based adhesive (hereinafter referred to as "aqueous adhesive A" acrylate-based polymer is subjected to gel permeation chromatography (GP C, solvent: tetrahydrofuran) to measure polystyrene. When the average molecular weight (Μη) and the weight average molecular weight (Mw) are converted, the number average molecular weight (?η) is 69,000 'the weight average molecular weight (Mw) is 13 5,000 〇 and the water-based adhesive A is measured in 3 〇 The intrinsic viscosity (η-) in chloroform is 1.2 dl/g. -42- 200825479 &lt;Synthesis Example 1 &gt; (1) Synthesis Example 1-1 In a reaction vessel substituted with nitrogen, a specific monomer a was charged with 8-methyl-8-carboxymethyltetracyclo [4.4.0.12, 5.17, 1 ()] 225 parts of 3-dodecene, 25 parts of bicyclo [2.2.1] hept-2-ene with a specific monomer b, and 2-hexene 2 7 · 0 parts of a molecular weight regulator, and a solvent Toluene 75 ml, the solution was heated to 60 ° C. Next, in the solution in the reaction vessel, the polymerization catalyst is added with 0.66 parts of a toluene solution containing triethylaluminum 1.5 mol/1, and a hexachlorination modified with tertiary butanol and methanol. Tungsten (tri-n-butanol: methanol: tungsten = 0.35 mol: 0.3 mol: 1 mol) concentration 〇 〇 5 mol / 1 of toluene solution 3.7 parts, this system at 80 ° C for 3 hours The ring-opening copolymerization was carried out by heating and stirring to obtain a ring-opening copolymer solution. In the polymerization reaction, the conversion ratio is 9 7%, and the ring-opening copolymer (hereinafter referred to as "polymer (丨)") of the obtained ring-opening copolymer solution is chloroform at 30 °C. When measuring the intrinsic viscosity (Tlinh), it is 〇5〇7dl/g. (2) Synthesis Example 1 - 2 In the above Synthesis Example 1-1, except that the amount of 1-hexene added as a molecular weight modifier was 2 7 · 4 parts, the same as in Synthesis Example 1-1 was obtained. Ring copolymer solution. The obtained ring-opening copolymer (hereinafter referred to as "polymer (2)") 3 (when the inherent viscosity (Inh) was measured in TC chloroform] was 〇.496 dl / g 〇 -43 - 200825479 (3) Synthesis Example 1 3 In the above Synthesis Example 1-1, except that the amount of 1-hexene added to the molecular weight modifier was 27.8 parts, the same as in the synthesis example 1 was obtained to obtain a ring-opening copolymer solution. When the intrinsic viscosity (η 1 nh ) was measured in the chloroform at 30 °C (hereinafter referred to as "polymer (3)"), it was '0.492 dl/g 〇(4). Synthesis Example 1-4 Synthesis Example 1 above - In the first, except that the amount of 1-hexene added to the molecular weight modifier is 26.8 parts, the ring-opening copolymer solution is obtained in the same manner as in Synthesis Example 1-1. The obtained ring-opening copolymer (hereinafter referred to as The intrinsic viscosity (Inh) of the "polymer (4)") was measured at 30 ° C in chloroform to be 0.51 10 dl / g. The hydrogenation reaction gave the obtained polymer (1) to (4) solution 4 0 0 0 Each part is loaded into an autoclave, where the ring-opening polymer solution is added separately

RuHCl (CO) [P (C6H5) 3]3 〇·48 parts, hydrogenation reaction was carried out by heating and stirring for 3 hours under conditions of a temperature of 1 〇 MPa and a reaction temperature of 165 °C. The hydrogenation rate of each of the resins (each of the resins (a-1) to (a-4)) obtained by the hydrogenation reaction was measured by a nuclear magnetic resonance (NMR) spectrum (400 MHz '1H-NMR spectrum) manufactured by JEOL Ltd. When it was dissolved in chloroform d (-44 - 200825479 CDC13), it was 99.9%, and it was confirmed that the aromatic ring was not substantially hydrogenated. Similarly, the weight % of the specific monomer a was 8 8 · 8 wt%, and the weight % of the specific monomer b was 11.2 wt%. Further, regarding the resin (a-Ι), the number average molecular weight in the measurement of the polystyrene-converted average molecular weight (??) and the weight average molecular weight (Mw) by gel permeation chromatography (GPC, solvent: tetrahydrofuran) (Μη) was 20,800, the weight average molecular weight (Mw) was 62,000, and the molecular weight distribution (Mw/Mn) was 3.00. Further, the glass transition temperature (Tg) of the resins (a-Ι) to (a-4) was 130 ° C, and the saturated water absorption at 23 ° C was 0.3% by weight. Further, when the SP 値 of the resin (a-Ι) was measured, it was 19 (MP a1/2 ). Further, in the resin (a-Ι) to (a-4), when the intrinsic viscosity (η -) was measured in chloroform at 30 ° C, each of the resins (a-1): 0.507 dl/g, resin (a) -2 ) : 0.496 dl / g , resin (a-3 ) : 0.492 dl / g, resin (a-4 ): 0.510 dl / g. &lt;Synthesis Example 2&gt; In addition to the use of a specific monomer a of 8-methyl-8-methoxycarbonyltetracyclo [4.4.0. 12, 5.17, 1 ()]-3-dodecene 237 parts, and specific A ring-opening copolymer was obtained in the same manner as in Synthesis Example 1 except that the monomer 15 was 5-(4-biphenylcarbonyloxymethyl)bicyclo[2·2·1]hept-2-ene 13 (hereinafter, It is a "resin (5)") solution. In addition, the amount of 1-hexene added to the molecular weight modifier was increased to 2 7.5 parts, and a solution of a ring-opening copolymer (hereinafter referred to as "resin (6)" -45 - 200825479) was obtained. Then, a hydrogenation reaction was carried out on each of the resins (5) and (6) in the same manner as in Synthesis Example 1, to obtain hydrogenated polymers (a-5) and (a-6). With respect to the obtained resin, the hydrogenation ratio of each of the resins was 99.9% as measured by NMR, and it was confirmed that the aromatic ring was not substantially hydrogenated. Similarly, the weight % of the specific monomer a was 94.9% by weight, and the weight % of the specific monomer b was 5.1% by weight. Further, when the resin (a-5) is subjected to gel permeation chromatography (GPC, solvent: tetrahydrofuran), the number average molecular weight (?η) and the weight average molecular weight (Mw) in terms of polystyrene are measured, and the number average molecular weight ( Μη) was 19,000, the weight average molecular weight (Mw) was 57,000, and the molecular weight distribution (Mw/Mn) was 3.00. Further, the glass transition temperature (Tg) of the resins (a-5) and (a-6) was 150 ° C, and the saturated water absorption at 23 ° C was 0.3% by weight. Further, in the resins (a-5) and (a-6), when the intrinsic viscosity (η; nh) was measured in chloroform at 30 ° C, each of the resins (a-5): 0.470 dl/g, resin ( A_6 ) : 0.45 7dl/g. [Example 1] In the solution of the resin (a-Ι) to (a-4) produced in Synthesis Example 1 (solid content concentration: 20% by weight), the antioxidant was made to make pentaerythritol four [3- ( 3,5·di-tertiary butyl-4-hydroxyphenyl)propionate], each of which was added 0.30 part with respect to 100 parts of the resin. Here, the resin (a-Ι) solution is mixed with the resin (a-2) solution, -46-200825479 at a ratio of 0.499 dl/g of the resin mixture measured at 30 ° C in chloroform to obtain a resin. Solution (I), such that A and 将, the solution of the resin (a-3) is mixed with the resin (a-4) at 30 ° C, the inherent viscosity of the resin mixture measured in chloroform is 0.497 dl / g The resin solution (II) was obtained to give B. Next, from the tank A and the tank B, the resin solution (I) and (II) were solidified at a ratio of 0.498 dl/9 in a resin mixture measured at 30 ° C in chloroform, and the resin solution was continuously supplied. The solution was mixed, and the mixed solution was filtered using a metal fiber sintered filter of Japanese fine diameter 5 μηι, and the solution was filtered while the differential pressure was collected in C, and then used (Toshiba Machine Co., Ltd.; 48), with 3 stages of aeration (to degas the toluene, the resin flowing out of the strand die using a gear pump in the downstream flow is coldly fed to the casting strip cutter in the cooling water tank, and cut into rice grains. The granules were obtained. The granules were dried in a nitrogen atmosphere at 100 ° C for 4 hours and sent to a uniaxial extruder (90 mm 0&gt;), and the smelting gears were subjected to quantitative extrusion at 260 ° C, using a nominal opening of 10 μηι line. The metal fiber sintered filter 'melt-filtered' was used (1 700 mm wide), and the gap between the exits of the hanger mold was extruded into a film shape at &lt; 2 60 ° C. The die length of the mold used at this time ( Length of parallel part) 20 mm. The outlet is discharged from the die to the roll to become a solution in the tank, and the viscosity is given in the resin solution stored in the trough, and the wire is made to be 二4. , will be cast, then, feed, and at the same time with the fine coat hanger type). 5 mm at the die exit pressure point -47- 200825479 from 65mm, the extruded film, held in the surface roughness The surface of the film was transferred to a glossy surface between a mirror roll of 0.1 之 25 〇Γηη Φ and a metal strip of 0.3 mm thick. A metal belt (width 165 mm) is a rubber-coated roll (the diameter of the roll is 150 ηηηηΦ), and is held by a cooling roll (roller diameter of 150 mm). A commercially available sleeve type transfer roll (Chiba) is used. Transferred by the mechanical industry). The roller interval during transfer was 0.35 mm, and the transfer pressure was 0.35 MPa. The peripheral speed of the mirror roll at this time was made lOm/min. At this time, the temperature of the mirror roll was set to 1 5 5 t at a temperature of 1 2 5 t, and the temperature of the rubber coated roll was set at 11 5 t. On the flow side below the mirror roll, there was a cooling roll 1 in which 2 5 ΟπιηηΦ was placed, and the film peeled off from the mirror roll was cooled in 2.1 seconds after being pressed against the cooling roll 1 set at 1 15 °C. After the chill roll 2, the film was peeled off at a peeling tension of 44 MPa · cm. The film was masked on one side and wound up by a winder to obtain a width of 1 mm and a length of 500 m. The resin film (hereinafter referred to as "resin film (a)"). A film of a size of 100 mm x 500 mm was cut out every 100 mm along the width direction of the obtained resin film (a) as a sample, and the melt flow rate (MFR) of 98 N was measured at 260 ° C according to JIS K7210. .厘? After 11 is 39.5~40.28/1〇111111, and the measurement deviation is ± 0.9%. Further, the thickness distribution in the width direction of the film was 1 〇〇.2±〇.5 μιη. [Example 2] -48- 200825479 except that in Example 1, a solution of the resin (a-5) obtained in Synthesis Example 2 was stored in the tank A, and a solution of the resin (a_6) was stored in the tank b, from the tank a and In the tank B, the resin (a-5) solution and the resin (a-6) solution are continuously supplied to the resin solution in a ratio of the internal viscosity of the resin mixture measured in 3 (TC chloroform to 464.464 dl/g). Then, the pellets were obtained in the same manner as in Example 1 to obtain a resin film (hereinafter referred to as "resin film (b)"). When the MFR was measured in the same manner as in Example 1, the MFR was 39.8 to 40·4 g. /10 min, the measurement deviation was ±l·5 o/o. Further, the thickness distribution in the width direction of the thin I 为 was 1 〇〇.1±: 〇.4 μΓη. [Comparative Example 1] In Example 1 'in the resin solution In the stage, the solution mixing is not carried out, but the resin (a-Ι) solution is fed into the uniaxial extruder by a plug flow, and the solution is desolvated to obtain granules. Then, a resin film (hereinafter referred to as "resin film (c)") was obtained in the same manner as in Example 1. When the MFR was measured in the same manner as in Example 1 in the obtained film, the MFR was 38. 5 to 45.8 g/10 min, and the measurement deviation was ±17%. Further, the thickness distribution in the film width direction was 1 〇〇.3ι! [Example 3] Using the resin film (a) obtained in Example 1, the film was stretched to 1-2 times at a temperature of 130 ° C using a roll cutter (r ο Π nip ) type vertical-axis stretching machine. , in 1 3 〇. 拉伸 Use a stretcher-type horizontal stretching machine to stretch 1.4 times to obtain a thickness of 70 μηι -49-200825479 stretched film (hereinafter referred to as "stretched film (A)"). The phase difference of the film (A) is such that the phase difference (R〇) in the plane of the film is 6 〇 nm. Further, the total light transmittance of the stretched film (A) is 93%, and the haze is 〇. 2%. Further, the thickness distribution in the width direction of the film was 70.2 ± 0 · 3 μm. [Example 4] In Example 3, except that the resin film (b) obtained in Example 2 was used instead of the resin film (a) and the stretching temperature was obtained. In the same manner as in Example 3 except for 1 5 5 t, a stretched film (hereinafter referred to as "stretched film (B)") was obtained. The phase difference of the stretched film (B) was in the film surface. The phase difference (R0) was 63 nm. Further, the tensile film (B) had a total light transmittance of 93% and a haze of 0.2%. Further, the thickness distribution of the film was 5 8.4 ± 0 · 2 μηι ° [Comparative Example 2) In the same manner as in Example 3 except that the resin film (c) obtained in Comparative Example 1 was used instead of the resin film (a), a stretched film was obtained (hereinafter, referred to as "stretched film ( C )"). The phase difference of the stretched film (C) was such that the phase difference (R0) in the film plane was 63 nm. Further, the stretched film (C) had a total light transmittance of 93% and a haze of 15%, which caused blurring on the surface of the film. Further, the thickness distribution of the film was 70.5 ± 3. 1 μηι 〇 [Example 5] -50- 200825479 A polyvinyl alcohol film having a thickness of 50 μm was immersed in iodine 5 g, potassium iodide 2 50 g, boric acid 1 〇 g, water A polarizing film was obtained by stretching one-axis to four times in about 5 minutes while taking a bath of 40 °C. On the surface of the polarizing film, the resin film (a) prepared in Example 1 and the stretched film (a) produced in Example 3 were bonded to each side of the polarizing film by using the water-based adhesive obtained in the first modification. Polarizer (1). When the transmittance and the degree of polarization of the polarizing plate (1) were measured, they were each 43% and 99.99%. Further, when the polarizing plate (1) is in two crossed Nicols state, when one of the polarizing plates (1) is irradiated with a backlight of 1 OOOOcd, it is impossible to confirm the line-like shape caused by the light leakage from the other side. Uneven. [Comparative Example 3] A resin film (c) was used instead of the resin film (a), and a stretched film (C) was used instead of the stretched film (a), and the same as in Example 5, a polarizing plate was obtained ( 2 ). When the transmittance and the degree of polarization of the polarizing plate were measured, they were 42% and 99.89%, respectively. In addition, the polarizing plate (2) is in the state of a positive Nikko, and it is considered to be caused by the light of the diffused light when viewed from the other side from the backlight of 1 cd. Leakage can be confirmed. [Industrial Applicability] The optical film and polarizing plate of the present invention can be used, for example, in a mobile phone, a digital end, a pocket bell, a navigation system, a liquid crystal display for a car, a crystal monitor, a dimming panel, and a 〇A For liquid crystal display devices and AV devices -51 - 200825479 Various liquid crystal display elements such as displays, electroluminescence display elements, touch panels, etc. Further, it is also useful as a wavelength plate for a recording/reproducing apparatus for optical discs such as CDs, CD-Rs, MDs, MOs, and DVDs. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] A schematic diagram showing a sampling method for MFR measurement in the present invention. -52-

Claims (1)

200825479 X. Patent Application No. 1 An optical film having an optical film having a width of 1 000 mm or more from a cyclic olefin resin having a structural unit of a compound represented by the following formula (1), characterized in that it is along the film A film of 100 mm x 500 mm size is cut out every 100 mm in the width direction as a sample, and the measurement deviation of the melt flow rate is 5% or less when the melt flow rate (MFR) of the 260T:, 98N load is measured in accordance with JIS K7210. 1] R1 (In the formula (1), R1 to R4 represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 30 carbon atoms, or another monovalent organic group, which may be the same or different, and any two of R1 to R4 may be used. Mutual bonds ' can form a single-ring or multi-ring structure, m is 〇 or a positive integer, P is 0 or a positive integer). 2. The optical film of claim 1, wherein the structural unit of the cyclic olefinic resin has a structure represented by the following formula (2), -53-200825479 [Chemical 2] (In the formula (2), R1 to R4, p, m have the same meanings as in the above formula (1)) 〇3 · The method for producing an optical film according to the first aspect of the patent application' wherein the same composition and the average molecular weight are different The cyclic olefin-based resin is mixed, and the average molecular weight of the resin supplied to the molding machine is adjusted to be in a granular shape, and the optical film is molded using the particles. 4. The method for producing an optical film according to the first aspect of the invention, wherein a plurality of cyclic olefin-based resins having the same composition and different average molecular weights are mixed, and the average molecular weight of the resin supplied to the molding machine is adjusted to be constant to form an optical film. By. 5. An optical film which is then stretched as in the film of claim 1 or 2. A polarizing plate characterized by laminating an optical film according to any one of claims 1 to 3 on at least one side of a polarizing element. A liquid crystal panel characterized in that a polarizing plate of a sixth aspect of the patent application is laminated on at least one side of a liquid crystal display element. -54-