TW201213422A - Retardation compensation film and preparation method thereof - Google Patents

Abstract

The present invention relates to a retardation compensation film and a preparation method thereof, characterized by adding a proper additive to the retardation compensation film for increasing dimensional stability and using a stretching process to make the retardation compensation film have a retardation value (Re) of 20 to 300 nm in the in-plane direction (x-y), and a retardation value (Rth) of 30 to 500 nm in the thickness direction of film. Accordingly, the retardation compensation film has a high dimensional stability, and the phase difference thereof can be properly controlled and adjusted to form a retardation compensation film disposed between a polarizing film and liquid crystal cells of a liquid crystal display.

Description

201213422 VI. Description of the Invention: [Technical Field] The present invention relates to a phase difference compensation 貘 and a method of fabricating the same, and a method for fabricating a phase difference compensation film for a liquid crystal display and a method for fabricating the same: A conventional phase difference compensation film (such as a trisorptive acid cellulose film) for liquid crystal displays is used in a large number of protective films for polarizing plates of liquid crystal display devices because of its high transparency and lack of optical defects. . However, with the improvement of the display technology and the requirements of the living environment, there is an increasing demand for the display size, and the requirements for the wide viewing angle are more complicated. To improve this problem, it is necessary to increase the phase value and make appropriate adjustments for phase =, especially for phase difference compensation films satisfying Re/ | Rth | < 0.5, where Re is the phase difference compensation film in the plane. Hysteresis of xy). Rth is the hysteresis value of the phase difference compensation film in the film thickness direction (z). It is known that there are roughly three types of phase difference compensation film disposed between the liquid crystal display element and the polarizer of the polarizer (for example, refer to Patent Document 曰本开开 2000-154201, Patent Document Japan Untitled 2002-- Bulletin No. 156527). The first type utilizes additives (such as negative birefringence materials of aromatic compounds, which are easy to form a flat structure due to the benzene ring structure, like a negative C-plate (nx=ny> nz), in which a benzene ring and π-π * will affect the molecular birefringence) ' or increase the phase difference by adding liquid crystal polymer (disc, rod, and disc-like effect), and in order to achieve large size, use solution Casting by film forming method; the second is to change the amount of substitution of polymer 201213422, and to achieve the phase difference by uniaxial or biaxial stretching. The third system utilizes polymers (such as PC/ The phase difference compensation film is manufactured by modifying the material such as COP/MCOC and by the extrusion process. The above three gas systems utilize a modification of the polymer or the addition of a high phase value additive to create a high phase difference compensation film. In the conventional method, although the phase difference compensation film is formed by mixing the additive and increasing the phase difference, the added "force agent is not able to catch 20 to 300 nm by using TPP, BDP or EPEG, etc." Since Rth is a high phase difference of 30 to 500 nm, it is still incapable of having an excellent effect on the compensation of the head position difference. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a polarizing film which is formed on a liquid crystal display by adding appropriate additives to improve dimensional stability and appropriately controlling and adjusting by stretching. A phase difference compensation film between liquid aB cells. Only the blood two 丨1 state provides a phase difference compensation film, which is formed by 醯化,, wherein the phase difference compensation film is in the plane 4 2G~ then (10)' surface thickness direction (Z)_value· is the phase 丄ff Provided is a method for fabricating a phase difference compensation film, which comprises the following: (4) consisting of deuterated cellulose and an additive, which is carried out at 70 C, and then uniformly mixed, and then 201213422 deuterated cellulose is added to it by 1~ 72 hr of mixing to uniformly dissolve the deuterated cellulose in the polymer solution; thereafter, the polymer solution is cast to a metal support to form a phase difference compensation film, and then the semi-dried phase difference compensation film is applied from the metal The support is peeled off and moved to a drying system to remove the solvent; and the phase difference compensation film is peeled off from the metal support and dried, and the phase difference is compensated at a temperature between the crystallization temperature and the melting point of the polymer. After the film is subjected to heat treatment, a uniaxial stretching or biaxial stretching process is further performed.

The invention can increase the dimensional stability and solvent resistance of the phase difference compensation film by adding an additive to the deuterated cellulose, and achieve stability, high durability and small color deviation corresponding to the use of madness and environment. effect. The hysteresis value (abbreviated as "Re") in the in-plane direction (x_y) of the phase difference compensation film of the present invention is 20 to 80 nm, and the hysteresis value ("Rth") in the film thickness direction (z) is 3 〇~5〇〇11„1.1^ and Rth respectively satisfy the following formula (Expression (1) : Re = (nx-ny) X d ^ · ινιη = 1 (nx+ny)/2 - nz } χ d nx The film wherein nx is the refractive index along the x direction of the thin crucible, the refractive index in the η direction, and ηζ is the thickness (nm) along the thickness of the film. ] refractive index, d control of hysteresis value (Re) in the plane direction Control, and the hysteresis value of the thickness direction _, the peak extension condition is controlled by the stretching and stretching conditions, and 彳 can be controlled by the temperature difference in the phase difference compensation film by the stretching process. Therefore, it is possible to achieve the dimensional stability of the (tetra) compound and the size of the K compound to the appropriate additive. [Previous =, the light of the liquid crystal display of the present invention is found 5 201213422 The phase difference of the transparent polymer for the polarizer The compensation film has requirements for dimensional stability. The additive used in the present invention contains an aromatic polymer compound and a polyol ester compound. "The composition of the additive and the addition of an appropriate ratio can improve the dimensional stability and solvent resistance of the phase difference compensation film, and the stretching process is used to adjust the hysteresis value so that the phase difference of the present invention is compensated. The film has the above-mentioned hysteresis value Re in the in-plane direction (x_y) of 2 〇, such as melon, and the hysteresis value Rth in the film thickness direction (z) is 30 to 500 nm, thereby achieving stability corresponding to application and environment. [Embodiment] The method for producing the phase difference compensation film of the present invention will be described below. The phase difference compensation film of the present invention is composed of deuterated cellulose and an additive. a polymer solution containing deuterated cellulose, an additive and a solvent. The solvent is added in order to dissolve the deuterated cellulose so that the mixture can be well mixed with the additive, but in the casting film forming method described later After the removal, the phase difference compensation film prepared by the brewing system is prepared by the brewing agent. The polymer solution is prepared at a temperature of 20 to 7 (in the rc, it is 35~ hunger is better) Appropriate proportion of Tim After leveling agent and solvent the sentence, then the acylated cellulose is added thereto, mixed by Ke crucible of eight 1~72hr

The deuterated cellulose is uniformly dissolved in the polymer solution. D wherein 100 wt% of the polymer solution, 2 to 25 wt%, preferably 5 to 2 wt%; the additive accounts for 1 to 15 wt% of the deuterated cellulose, preferably 1 to 5 wt% of 201213422; organic solvent It accounts for 7〇~95wt%. Hereinafter, the cellulose, additives and agents used in the present invention will be described separately.添加剂 The additive used in the present invention comprises two components: component j. various poly-compounds, and all or a part of the hydroxyl groups which can be used with at least one monolysine di-polynonanol can be esterified to retain a free hydroxyl group. 9 Component α is an aromatic polymer compound (for example, Aromatic P〇lyester) having high hysteresis value and low permeability, and having at least one aromatic ring in its molecular structure, at least A cycloalkylhydrazine or at least one aromatic ring and cycloalkyl ring, preferably having at least a tri-aromatic ring, at least three cycloalkyl rings or at least three aromatic rings and a cycloalkyl ring. Examples of aromatic polymer compounds are as follows: (1)

2,2'-(ethane-1,2-diylbis(oxy))bis(ethane-2,1 -diyl) dicyclohexanecarboxylate

201213422 2,2'-(2,2'-oxybis(ethane-2,1 -diyl)bis(oxy))bis(ethane-2,1 -diyl )dibenzoate (3)

3,3'-(propane-1,3-diylbis(oxy))bis(propane-3,1 -diyl) dibenzoate

1-(1-(1-(benzoyloxy)propan-2-yloxy)propan-2-yloxy)propan- 2- yl benzoate (5)

8 201213422 (ΤΜΡΤΒ) 2-(benzoyloxymethyl)-2-ethylpropane-l,3-diyl dibenzoate (6)

2-(acetoxymethyl)-2-ethylpropane-l,3-diyl dibenzoate

2-(acetoxymethyl)-2-ethylpropane-1,3 -diyl dicyclohexanecarboxylate (9) 201213422

2-(cyclohexanecarbonyloxymethyl)-2-ethylpropane-1,3-diyl dicyclohexanecarboxylate Φ (10)

2-ethyl-2-(hydroxymethyl)propane-l,3-diyl dicyclohexanecarboxylate

(11)

10 201213422 pentane-1,2,3,4,5-pentayl pentacyclohexanecarboxylate (12)

Pentane-1,2,3,4,5-pentayl pentabenzoate (13)

(14)201213422 Ο

5-(cyclohexanecarbonyloxy)-3-methylpentane-l,3-diyl dicyclohexanecarboxylate

(15) 5-(benzoyloxy)-3-methylpentane-l,3-diyl dibenzoate

(16)

3-(2-(benzoyloxy)-di-(pr〇p〇xy)pr〇pane-l,2-diyl dibenzoate 12 201213422 In particular, since the above aromatic polymer compound is preferably TMPTB, Further, the aromatic polymer compound of the present invention is a component n containing TMHB as an additive. Since the cellulose vinegar film contains a part of the aromatic polymer compound, the cellulose vinegar film of the present invention is in contact with a general cellulose vine film. The above additives may also contain other compounds. For example, the above additives may contain at least one type of polyterpene alcoholic acid compound. The molecular weight of the aromatic polymer compound is 200 to 1 Torr, 〇 〇〇, preferably 7〇〇~2 2〇〇, the polyol vinegar compound has a molecular weight of 300 to 8,000, preferably 4 to 8 Å. The aromatic polymer compound and the polyol ester compound The composition ratio may be 丨: 1 〇 to 1 〇: 1. In order to dissolve the fluorinated cellulose well, the present invention firstly mixes the additive with the solvent, and then adds deuterated cellulose. The solvent may be, for example, dichloride.曱, chloroform, etc. The solvent is preferably a boiling point of 8 〇»c or less, more preferably in the range of 40 to 60 ° C, wherein dichloromethane is more preferable. Further, since the brewed cellulose has a hydroxyl group or an ester a hydrogen-bonding functional group such as a ketone, so that the phase difference compensation film is more easily peeled off from the steel sheet for film formation, and the solvent of the φ machine preferably contains 2 to 20% by weight of an alcohol (for example, decyl alcohol, ethanol, 2-propanol, etc.) The cellulose of the present invention uses Cellulose Acetate Propionate (CAP), and the CAP used may be CAP-482-20 or CAP141-20 (both by Eastman Chemical). Produced by Company. The deuterated cellulose system satisfies the following formula (3) and formula (4): Formula (3): 1.0KSA + SBS2.59 Formula (4): 0.01 <SA$2.59; 0.01 < SBS2 .59 13 201213422 , where 'SA indicates the degree of substitution of the hydroxyl group of the cellulose by the ethyl hydrazide group (also known as the substitution ratio of the acetylene acid); SB indicates the degree of substitution of the hydroxy group of the cellulose by the propyl group (also known as Propionate substitution rate) CAP is the main component of the phase difference compensation film, and its content is, for example, about 70 to 95° of the total weight of the phase difference compensation. Between 〇, the above-mentioned propionate substitution rate (SB) is large (the degree of substitution of the hydroxyl group of cellulose substituted by propyl sulfhydryl group) affects the optical properties of the phase difference compensation film. Therefore, the substitution rate of propionate is better. The cellulose deuterated cellulose used in the present invention may be, for example, TCA (cellulose triacetate) or CAP (cellulose acetate propionate) in addition to the above CAp, for use in optical applications and the like. , cellulose ester of cAB (cellulose acetate butyrate), cellulose tripropionate, DAC (diethylhydrazine cellulose). Next, a phase difference compensation film is formed by a casting film forming method. First, a polymer solution (hereinafter simply referred to as a sauce) is used to cast a sauce from a slit of a press die to a metal support (such as a steel sheet for film formation) by a press die (casting) . Next, the semi-dried phase difference compensation film is peeled off from the metal support and then private to the drying system to remove the solvent. Lu then 'disconnects the phase difference compensation film from the metal support and drys it'. After the uniaxial stretching or biaxial stretching process, the phase difference compensation film after stretching can improve the film uniformity and thus increase the phase value. . The uniaxial stretching process is performed by the phase difference compensation film after the casting film forming method at a temperature between the crystallization temperature and the melting point temperature of the polymer. Carrying direction (Transverse direction; TD) Stretching 'While the stretching ratio is preferably 5 to 45%, the hysteresis value can be 14 201213422

The range of Re is regulated at 2 〇 to 3 〇〇 nm, and the range of the hysteresis value Rth is regulated at 3 0 0 2 50 〇 nm. When the glass transition of the phase difference compensation film used in the production method of the present invention and μ f are Tg (C), the stretching temperature is preferably from Tg + i ° c to Tg + 3 〇 C, more preferably a polymer. The crystallization temperature is 3 〇, c. ^ 5 Hai biaxial stretching (also known as sequential stretching) process is based on the crystallization temperature of the polymer and the melting point temperature _ - temperature after the heat treatment of the phase difference complementary gamma, parallel to the direction of transport (Machine directi〇n ; MD) to stretch,

Then, in the direction of the father, 彳^^(10)... Shen Bei out of this immortal: Ding Qiao stretched. The stretching ratio in the MD direction is preferably 5 to 4 G%, and the stretching ratio in the TD direction is preferably 5 to 6 G%, and the lion value of the lion value is controlled at 20 to 3 〇〇胍 '. The difficulty is in 3 () ~ her 1. The order of the order = the order is not particularly limited, and the stretching in the TD direction may be performed before the sleeve is pulled in the hall. The uniaxial stretching or biaxial stretching process can be further divided into wet stretching 2, method. The wet stretching method is performed by double-drawing =! ' under a uniform force in a solvent residual amount of about (-), preferably about 1G to 3GWt%. It is difficult to carry. Dry light wire (4) content less than lwt / ° under the biaxial or uniaxial stretching. Manufacturing method, uniaxial stretching process and biaxial stretching; ί:= stretching temperature conditions are required to be stretched at the crystallization temperature of the polymer, which can improve polymer chain whitening (haze rise) ) or the phenomenon of broken film. And the alignment and alignment of the polymer chains can be controlled by == 咅 15 201213422. The phase difference compensation film of the present invention has a high phase difference value (in-plane hysteresis value _)) and can be controlled by the phase difference value of the difference complement _ by the stretching condition rate and stretching. For the improvement of the thickness direction _), the phase difference can be increased by the phase difference _ sister magnification ratio and (4) amplitude (4), and the stretching range is 2 to 50~35Gnmi for the lower thickness direction (Rth). 'It can be controlled by the temperature (4). When the towel is increased in the listening range, the hysteresis value in the thickness direction is preferably reduced by about 1 〇 to 3 〇 nm. The increase in the hysteresis value (Re) of the in-plane direction of the phase compensation film can be improved by controlling the stretching ratio and the stretching width of the phase difference compensation film, and the stretching width is preferably from 10 nm to 300 nm. The stretching range means the film thickness increase after stretching of the phase difference compensation film, that is, the film thickness after stretching and the film thickness before stretching. In order to detect the dimensional stability of the transparent phase difference compensation film, a shrinkage test was performed using a strange temperature and a wet baking phase to measure the dimensional increase before and after the heat shrinkage test: the shrinkage value. The temperature of the constant temperature and humidity oven was set to 2 〇 ° C, and the relative humidity was set to 85%. The phase difference compensation film to be tested was cut into 3 pieces each having a size of 10 cm x 15 cm, wherein the length in the MD direction was i5 cm, and the length in the TD direction was i 〇 cm. First, the phase difference is used to measure the initial value A of the film in the MD direction and the TD direction. Then, the phase difference compensation film was placed in an oven, and after standing for 24 hours, the dimensional expansion and contraction value B in the MD direction and the TD direction was measured by a two-dimensional instrument. The dimensional change rate P can be obtained by the formula P = (A - B) / A. The lower the dimensional change rate obtained, the higher the dimensional stability of the transparent phase difference compensation film. 201213422 The phase difference compensation film of the present invention has a dimensional change rate p(MD) and p(d) before and after treatment for 24 hours at 2 (rc, 85% relative humidity) of ~(4)' and 丨P_H > j p(10) It can be seen that for the improvement of the dimensional stability characteristic f, the present invention provides an optical rib differential film corresponding to the south stability of the system and the environment, high durability and small color deviation characteristics. The film has a characteristic of high dimensional stability, and the present invention proposes a phase difference compensation film containing an additive. Samples 1 to 12 are prepared below to test the dimensional stability of the phase difference compensation film. Samples 〇 1 to 12 are different. The types and contents of the additives are used to form the phase difference compensation film. The additives and contents added to each sample are shown in Table 1. TPP (triphenyl phosphate) and BDP (2-biphenyl diphenylphosphate) are phosphate compounds; EPEG (Ethyl phthalyl) Ethyl glycolate), TMPTB (trimethylolpropane tribenzoate) is an aromatic polymer compound. TP0 is a code name for a polyol ester compound, and its chemical formula is as follows:

Tl-(G-A-) m-G-Tl T1 is an alkyl group in which a monocarboxylic acid compound is polymerized, and the alkyl group has a carbon number of from 1 to 12', preferably from 5 to 12. The alkyl group in which the G-based glycol compound is polymerized has a carbon number of 2 to 12, preferably 4 to 12. 17 201213422 The alkyl group of the A-based dicarboxylic acid compound is polymerized, and the alkyl group has 2 to 12 carbon atoms, preferably 4 to 12 carbon atoms. m is the number of repetitions of the functional group (G - A-~). SR-444 is a pentylerythritol triacrylate (PTA) having the following structure: ch: - OH - C: H, a c - CH, - C - CH = CHj OC CH-CH: CH: - 〇, The thickness of the phase difference compensation film formed by c_ch=CH2 is, for example, between 1 〇 and 3 〇〇 μηη 'Additives (11 kg in samples 1, 3, and 7 with an additive content of 7 wt%) in the additive Samples 2, 4 to 6, 8, 10 to 12 1 in a content of 9 wt% were 14·4 kg' in the sample 9 having an additive content of llwt%, 18 = kg, and a sample of 2 compounds was added! In 7 to 9, the ratio of the two chemical & material = composition is: 〇 and solvent (two gas methane: 73 〇 kg and decyl alcohol: Λ 10 kg), and then mixed with cellulose acetate propionate (145.5 kg). The mixture is mixed into a polymer solution. After the casting process such as solvent casting (S〇lvent CaSting) is performed, a phase difference compensation film is formed by a drawing process. The phase difference compensation film formed by shrinkage is subjected to stretching direction shrinkage. Test, 'low' means higher dimensional stability. The test results are listed in 201213422 Table 1. Table 1, additive content and CAP The amount represents the weight percentage of the phase difference compensation film formed. Sample additive additive content (wt%) CAP content (wt%) Tensile shrinkage ratio 1 TPP/BDP 7% 93% 0.225 2 TPP/BDP 9% 91% 0.231 3 EPEG/TMPTB 7% 93% 0.226 4 EPEG/TMPTB 9% 91% 0.222 5 EPEG 9% 91% 0.278 6 SR-444 9% 91% 0.212 7 TPO/TMPTB 1% 93% 0.182 8 TPO/TMPTB 9% 91% 0.191 9 TPO/TMPTB 11% 89% 0.214 10 TPP 9% 91% 0.334 11 TPO 9% 91% 0.283 12 TMPTB 9% 91% 0.215

It can be seen from Table 1 that when the content of the additive is 9 wt%, when the additive contains both the polyol ester compound and the aromatic polymer compound (Sample 8), the two phosphate compounds are contained in the additive ( Sample 19 201213422 2), containing two kinds of aromatic polymer compounds (sample 4), containing only one aromatic compound (sample 5, sample 12), - species of multiple compounds (sample, 6, sample U) or one The phosphate compound (sample 1) has a low (four) rate in the (four) direction, and is a phase difference compensation film having high dimensional stability required by the present invention. In Samples 8 to 10 containing the polyol ester compound and the aromatic polymer compound in the same phenotype, when the additive content was 9 wt% (Sample 8), the ratio of the additive was 7 wt% (sample 7) and the content was nwt. % (% of sample, the lower the content, although it is helpful for dimensional stability, but the water vapor transmission rate will be too high, the material resistance water wire will be lower. If the money (four) rate is too high, it will absorb moisture and may It causes damage to other structures of the product, which leads to the product life and the decision of the company. The content is simplified and the effect is optimal. That is, the high phase difference film of the present invention only needs to contain the same The additive of the alcohol S 曰 compound and the aromatic polymer compound can improve the dimensional stability, without increasing the dimensional stability by increasing the additive content. In particular, the phase difference of the present invention The compensation film can be adjusted by the stretching process to apply the various components and the design of the shame according to the phase difference required by the user. For example, the invention has a high value phase difference value. Applied to quarter-wave plate (10) L45nm) and ι/2 wave plate (2500-1280 nm) 'The phase compensation film can be applied to the VAm〇del liquid crystal display by changing the light traveling speed to form a light-changing phase difference compensation film. The film/polarizer, the towel phase difference compensation film is divided into a monolithic and a two-piece combination, wherein the monolithic compensation film Re is about 35~45nm, and the Rth is about 201213422 120~140nm; and the two-piece compensation film Re is about 65 to 75 nm, and Rth is about 220 to 240 nm. The phase difference compensation film of the present invention can also be applied to optical films of other phase difference designs. In summary, the present invention provides a phase difference compensation film which can adjust the phase difference value by adding an appropriate additive to the phase difference compensation film to achieve dimensional stability. [Simple description of the diagram] Lu None [Main component symbol description] None 21

Claims (1)

201213422 VII. Patent application scope: 1. A phase difference compensation film consisting of deuterated cellulose and additives, wherein the retardation value Re of the phase difference compensation film in the in-plane direction (xy) is 20 to 300 nm, in the film thickness The hysteresis value Rth of the direction (z) is 30 to 500 nm. 2. The phase difference compensation film of claim 1, wherein the deuterated cellulose accounts for between 70 and 95% of the total weight of the phase difference compensation film. 3. The phase difference compensation film according to claim 2, wherein the deuterated cellulose is selected from the group consisting of CAP, TCA (cellulose triacetate), CAP (cellulose acetate acetate), and CAB (butyric acid acetate) Any of a group consisting of cellulose esters of cellulose tripropionate and DAC (diethylhydrazine cellulose). 4. A phase difference compensation film according to claim 1 or 2 or 3, wherein the additive comprises an aromatic polymer compound and a polyol ester compound. 5. The method for producing a phase difference compensation film according to item 4 of the patent application, wherein the aromatic polymer compound has a molecular weight of from 200 to 10,000. 6. The method for producing a phase difference compensation film according to claim 4, wherein the polyol ester compound has a molecular weight of from 300 to 8,000. 7. The phase difference compensation film according to item 4 of the patent application, wherein a ratio of the aromatic polymer compound to the polyol ester compound is 1:10 to 10:1. 8. The phase difference compensation film according to item 4 of the patent application scope, wherein the molecular structure of the multi-component 22 zu ^ 213422 is a compound. a ring-shaped ring or at least a solid, an aromatic ring, to a phase difference between the fragrant ring and the ring cyclist ring. The acidified cellulose and the added age are used to form the target difference compensation film system, and the second method comprises the following steps: =::=, and then the solution is combined to dissolve the acidified cellulose uniformly. ' The poor solution is cast to a metal support to form a phase body ^ The semi-dried phase difference compensation film is supported from the metal; the sub-migration to the drying system to remove the solvent; and the compensation film to be self-supported from the metal branch The body is peeled off and dried/~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1〇· ^Application for the phase difference compensation film of the ninth item of the patent garden, the 〃 and zhong k additives are composed of an aromatic polymer compound and a polyol ester compound. A method for producing a phase difference compensation film according to the first aspect of the patent application, 〃中. The method for preparing the phase difference compensation film of the patent compound Fan Park, which is divided into 2〇〇~1〇,〇〇〇0;,^ 12. ^, the molecular weight of the polyol ester compound Between 300~8, 〇〇〇. 13. For the production method of the phase difference compensation film according to item 9 of the patent application, 23 201213422 14. 15. 16. 17. 18. 19. 20. 21. In the 100wto/〇 polymer solution, the deuteration Cellulose primary 2~25wt0/〇. The method for producing a phase difference compensating medium according to any one of claims 9 to 13, wherein the additive force is 1 to 15 wt0 / Torr in 100 wt% of the polymer solution. The method for producing a phase difference compensation film according to any one of claims 9 to 13, wherein in 100 wt% of the polymer solution, the solvent is an organic solvent and accounts for 70 to 95% by weight. A method for producing a phase difference compensation film according to claim 15 wherein the solvent has a boiling point of 80. (:The following. ------- ^-太J, only,, work-^ „ .... Production method' which is the second gas generation or chloroform. 1Application for the township _9 to 13 - the phase difference compensation film 乍 method of the item, wherein the agent comprises 2 to 20% by weight of an alcohol. ^ The phase difference compensation film of claim 18 of the patent scope is not produced by the alcohol as decyl alcohol, ethanol or 2- 1. The phase difference compensation film method of the patent _ 9th to 13th item, wherein the glass transition temperature of the phase difference compensation film is ^:), the stretching temperature is Tg + 戊 to Tg + 3 〇〇 c. Π = range 2nd phase difference compensation film manufacturing method = ; is higher than the crystallization temperature of the polymer ^:. Production method, its t 13 item - shape her differential compensation film single wheel stretching m = Pulling (4) for biaxial stretching..., stretching method is based on solvent residual amount of 5~40wt Ding Ye, the scope of profit 24 22. Under the scope of 201213422. The bicycle for producing the phase difference compensation film of C -9 to 〒 任 任 Item is biaxially stretched or carried out by a dry stretching method for stretching. The dry stretching method is based on the solvent residual amount being less than iwt%. 24. The phase difference compensation film of any of the items 9 to 13 extends the uniaxial stretching process orthogonal to the conveying direction. 25.2 material 郷 (4) 9 to 13 items of the shape-like differential compensation film coating method, wherein the biaxial stretching process parallel to the conveying direction of the stretching ratio of 5 to 4%, orthogonal to the direction of the stretching ratio 5 to 60% 〇26. The method for producing a phase difference compensation film according to any one of claims 9 to 13, wherein the biaxial stretching process is stretched in parallel to the conveying direction (MD)' The stretching is performed orthogonal to the conveying direction (TD). The method of manufacturing a phase difference compensation film according to any one of claims 9 to 13, wherein the biaxial stretching process is stretched orthogonally to the conveying direction (TD) and then moved parallel to the handling The direction (MD) is stretched. 201213422 IV. Designated representative map: (1) The representative representative of the case is: None (2) The symbol of the representative figure is simple: No 5. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: 2