TW201244914A - Polyvinyl alcohol polymer film and manufacture method thereof - Google Patents

Abstract

This invention provides a PVA film and the production method thereof. The PVA film has a high extension rate limit, would not break even being single axial extension with high rate, and capable of producing a polar film which is excellent in optic performance with high productivity and good yield. This invention provides the PVA film that satisfies the following formulae (I) and (II): Δ n(MD)Ave-0.1x10<SP>-3</SP> ≤ Δ n(TD)Ave ≤ Δ n(MD)Ave + 0.25x10<SP>-3</SP>...(I) Δ n(TD)Ave ≤ 2.5x10<SP>-3</SP>...(II) (in the formula, Δ n(MD)Ave represents a value of averaging the complex refractive index of the longitudinal direction of the PVA film along the thickness direction of the film, and Δ n(TD)Ave represents a value of averaging the complex refractive index of the width direction of the PVA film along the thickness direction of the film.) This invention also provides the production method of the PVA film including: (a)discharging a film forming stock solution that contains PVA as sheet shape onto a first drying roll of a film forming apparatus having a plurality of drying rolls, after partially drying, when drying by subsequent drying rolls in order and producing, (b)setting the ratio (ST/S1), that the circumferential speed of the drying roll (ST) while the evaporation ratio of the PVA film being 13 % by mass relative to the circumferential speed of the first drying roll (S1), as 0.990 to 1.050; (c)setting the ratio (SL/ST), that the circumferential speed of the last drying roll (SL) relatives to the circumferential speed (ST), as 0.960 to 0.980; (d)setting the ratio (SL/S1) as 0.970 to 1.010.

Description

201244914 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a polyvinyl alcohol-based polymer film, a method for producing the same, and a polarizing film manufactured by 5H/specific film. More specifically, the present invention relates to a film having a high ultimate stretch ratio and even if it is stretched at a high magnification, the film is not easily broken, and the elongation of the stretching operation due to the breakage of the thin crucible does not occur, etc., which can be high in productivity and good in productivity. A polyvinyl alcohol-based polymer film which is excellent in optical properties such as polarizing performance and a method for producing the same, and a polarizing film produced from the film. [Prior Art] A polarizing plate having a light transmitting and shielding function is equivalent to a liquid crystal display device having a switching function. The field of application of this liquid crystal display device has also expanded from the development of small computers such as computers and watches in the early days to notebook PCs, LCD monitors, liquid crystal color projectors, LCD TVs, car navigation systems, mobile phones, and homes. Wide range of measuring instruments that can be used inside and outside, especially LCD monitors or LCD TVs, are gradually becoming more and more popular. In general, a polarizing plate is obtained by uniaxially stretching a polyvinyl alcohol polymer film, dyeing it with iodine or a dichroic dye, dyeing the polyvinyl alcohol polymer film, and uniaxially stretching it. A method of performing a solidification treatment on a boride δ substance, a method of performing dyeing and a fixing treatment in any of the above methods, and the like, and a polarizing film is produced, and a cellulose triacetate film is bonded to one side or both sides of the polarizing film obtained thereby. It is produced by a protective film such as a cellulose acetate butyrate film. -4- 201244914 In recent years, in addition to the expansion of the use of liquid crystal display devices, etc., it has been demanded to reduce the cost or improve the operability. In terms of cost reduction, it is necessary to increase the production speed when manufacturing a polarizing film. When the anti-cutting polymer is extended by the (4) film: two fractures), the fracture loss is reduced, and the production is reduced, and the film is prevented from breaking. @ | + 办 Do not work on the extension or the extension of the dyeing operation. Short I::::: Productivity when polarized film is attached - there is a drying time when it is required to bind the film. From this point of view, as a polarizing thin poly 8: film 'has used a thickness of about 75 μm Polyvinyl alcohol film formation ^ However, in recent years, a thinner film of a polyvinyl alcohol-based polymer film having a thinner thickness has been required. On the other hand, the thinner the polyvinyl alcohol-based polymer film becomes, the more likely it is to break when it is extended at a g rate. From this point of view, a polyvinyl alcohol-based polymer thin WI film is required, and its limit extension ratio is high. Even if the thin kernels are extended, the high-yield, high-yield m$ is broken, and the polarized film having the same polarizing performance as the above is good. ... when Z is elevated, in order to improve the elongation or extension of the polyvinyl alcohol polymer film, the uniformity of the polyvinyl alcohol polymer film is extended to improve the polarization performance or durability of the polyvinyl alcohol polymer film. As a target, the raw material of the 3-polyethyl alcohol-based polymer is used as a target, and the polyvinyl alcohol of the roll used for the production of the dry-formed polyethylene-based polymer film is prepared. The ratio of the adjustment is 'the adjustment of the moisture content of the enol polymer film at the time of film formation. • 201244914 As such a conventional technique, it is known that: (1) in order to obtain a sufficient molecular alignment extending film during uniaxial stretching, in the film forming operation for producing a polyhydric polymer film, the following film formation will be employed. A method in which the film tension is reduced without limitation (Patent Document 丨, particularly the paragraph [0008H0009] 1 embodiment, etc.); (7) A polyvinyl alcohol-based polymer film capable of extending at a high magnification is used for the purpose of using a roller When a polyethylene glycol-based polymer film is produced by a tamping machine, [the winding speed of the obtained polyethylene-based polymer film] / [the film-forming original: the speed of the roller at the most upstream position] is set] The method of 0.84.3 (Patent 2), Ο) obtaining a polyvinyl alcohol-based polymer film capable of stretching at a high magnification as a purpose of drying step in producing a polyethylene-based polymer film using a roll film forming machine 'Set the volatilization rate of the film to 1 〇. / The following operating speed Rc and the final winding speed. The value (10) is called a method of 0.9 to U (Patent Document 3). The degree of obscurity is better than that of the right one: (4) In order to obtain a broad polyhedral film which can produce optical properties even in a large area, the optical properties of the film are thin, and the volatile component of the polyethylene film is Ig% or less + rapid drying roller speed (Rc) and winding: (Rf/Rc) is controlled at 〇9 skin ratio and manufactured - direction pull two: ^ drying step temperature is not uniform, _, pull The ratio of the elongation (%) to the elongation (S:) in the direction of the D (!) direction ((10) is a polyvinyl alcohol based on 0K3 = J Document 4), (5) in order to obtain uniform optical properties Outside &gt;命# L 八印积 has a film, in the polyethylene glycol thin film of the polyethylene glycol film, from the top of the ❹ ❹ ❹ ❹ 1 1 1 1 1 1 1 1 1 上游 上游 上游 上游The vinyl alcohol film, and the speed ratio V2/V1 of the speed V2 of the roller which is set to be the most upstream side of the step of the polyvinyl alcohol film and the step of the volatile component of the polyvinyl alcohol film to be less than 1 G weight% is "V2/V1". Method of μ 3 (Patent Document 5) Further, it is known that: (6) in order to obtain a uniform uniaxial extension of the supply energy and no extension The thin film of the finely cracked or voided film containing the specific layer 'core layer/cortex of the polyvinyl alcohol-based polymer thin m, and the raw material containing the polyvinyl alcohol-based polymer having a volatile matter ratio of 5 G to 9 G f (When the drying roller is heated, the surface of the polyvinyl alcohol-based flat film film which is not in contact with the first drying roller is blown with hot air under a predetermined condition, and when the volatile matter ratio is 15 to 30% by mass, the polyvinyl alcohol is used. The polymer film is peeled off from the b-th drying roll to dry the contact roll 2 and dried, and at this time, the ratio of the peripheral speed (S1) of the first drying roll to the peripheral speed (S2) of the second drying roll is set (s^s The method of 1.000 to 1.100 (Patent Document 6), etc. 1 However, in the above-mentioned Patent Document 6, a polyvinyl alcohol-based polymer film which is a film of a polyethylene glycol mixture, in particular, has a high film thickness: In the case of uniaxial stretching, in order to prevent the film from being broken: 朿, especially in order to further enhance the limit of the film, the extension is not disclosed. 朿 朿 曰 曰 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 6-1 141, 曰本特开2001-3 1 5 146 曰本本特Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Non-patent literature of patent documents! "Polymer science 〇ne Point 1 〇 high name physical property", the first edition of the third brush, Kyoritsu Publishing Co., Ltd., 2〇〇7 B, ρ·19-21 [Invention] [Invention Solution to Problem] An object of the present invention is to provide a polyvinyl alcohol-based polymer film which has a high maximum stretch ratio and can be stretched at a high rate without cracking, thereby enabling good workability, high productivity, low cost, and good health. A polarizing stretch film having the same optical performance as that of the conventional product is manufactured. In particular, it is an object of the present invention to provide a polyethylene film which does not break even when the vinyl alcohol polymer film is thinner than the conventional polarizing film, and has a high limit stretching ratio and a high magnification. It is possible to smoothly and uniaxially extend the stretched film which is thinner than the conventional one, and at the same time, to shorten the drying time for manufacturing the polarized light, and it is possible to manufacture the polarizing thinner more efficiently. Furthermore, it is an object of the present invention to provide a process capable of continuously producing a polyvinyl alcohol system having the above-described excellent characteristics in a high production. Further, it is an object of the invention to provide a polarizing film comprising the above-mentioned polyethyl quinone film. In the light of the light of December, the thinning of the compound is thin, and the alcohol is polymerized. The poly-'When IX' can be formed into a thin sputum and the smooth material is thin sterol-based poly- 8 - 201244914 [Method of solving the problem] In order to achieve the above object, the inventors of the present invention found that the complex refractive index of the polyvinyl alcohol-based polymer film in the direction of the thickness direction of the film is averaged along the thickness direction of the film, and the relationship is at the same time. 'The refractive index of the polyvinyl alcohol-based polymer film is averaged in the thickness direction of the film, and the limit stretch ratio of the film is increased. Even if the film is not easily broken, the film can be produced at low cost without interruption. An extended film such as a polarizing film such as a polarizing property is manufactured satisfactorily. Moreover, it has been found that if the complex refractive index of the mechanical direction of the film of the film is along the thickness of the film in the range of a certain number of ', the limit of the film is extended, especially the 桢: rate of the polyethylene polymer film along the film. The averaging of the thickness direction and the wide sound ratio are averaged along the thickness direction of the film; the complex refractive index of the direction is averaged in the thickness direction of the film to be thinner than the above-mentioned polyvinyl alcohol-based polymer, due to / The thickness of the polyethylene film used for the manufacture of the polarizing film is thin, and even if it is about 3 〇 限 俾 ^ ^ ^ ^ ^ ^ ^ ^ , , , , , , , 申 申 申 申 , , , , , , , , , , , , , , , , , , The film shrinks the drying time when the polarizing film is produced. ^Currently, the mechanical direction (the length and width of the length of the enthalpy) is satisfied. The range of the complex p-number 値 of the specific width direction is satisfied: high-rate extension, industry, high yield, excellent optical properties, vinyl alcohol polymerization degree The direction averaging sound is further improved. The birefringence relationship of the direction of the folding direction of the machine direction, and the width of the film is in the thickness of the film. The thickness of the film is also thin and the film is highly smooth. 201244914 vf The person in charge of the case found that by using the film-forming stock solution containing the complex polymer of 4, there is 4 ethyl alcohol, the first dry light is on, and the imitation of the bank is the same. (4) Drying and film-forming, at this time, 'polymerizing the polyethyl alcohol, the peripheral speed of the drying roller at % is relative to the 丨 ;; the roller knives become the 13-quality specific range, making the most: The ratio of the peripheral speed of the rolls is based on the volatility of the polymer film &amp;&amp;&amp;&amp;&amp;&amp;&amp;&amp; The ratio of the final drying to the peripheral speed is at a specific number 値 = A polyvinyl alcohol-based polymer film. The inventor of the present invention found that when the polyvinyl alcohol-based polymer film of the above method = magnification, the center of the polyethylene; Volatile volatilization (4) == is preferred, and the surface temperature of each drying is 6 generations. If the volatilization ratio of the film forming solution containing the polyvinyl alcohol polymer is J 60 to 75 mass%, When the surface temperature of the first drying roller is 8 〇 12 f) ° C, the mechanical speed of the first drying is 8 m / min or more to 0. The machine capable of producing a polyvinyl alcohol-based polymerization film with good productivity can be smoothly produced. The complex refractive index of the direction is averaged along the thickness direction of the film...width=folding: the ratio is averaged along the thickness direction of the film. 3 is homogenized and extends at a high limit of a given number of ranges: alcohol polymer The film is based on the knowledge of such knowledge. The present invention has been completed. The present invention is: (1) a polyvinyl alcohol-based polymer film characterized by satisfying the following formula (I) And (II) Δ n(MD)Ave-〇.lxi〇-3^ Δ n(TD)Av^ Δ n(MD)Aye + 〇_25χ1 0_3 (I) △ n(TD)Ave$ 2.5xl〇-3·.. (ιι) [In the above formula, Λη (Μυ polyvinyl alcohol polymer film in the mechanical direction of the complex refractive index along the film In the thickness direction averaging, Δ n(TD)Ave represents the enthalpy of the complex refractive index of the polyvinyl alcohol-based polymer film in the width direction along the thickness direction of the film.] Moreover, the present invention is (111) (:2) A polyethylene glycol-based polymer film of (1), which satisfies the following formula: 1.3χ10.3 (Δ n(MD)Aveg 2 〇χ1〇·3 (iii broad and (1) such as (1) or (7) polyethylene The alcohol polymer is in the range of 30 to 65 μm. Eight thicknesses In addition, the present invention is: (4) A polyvinyl alcohol-based polymer is thin: I坆 method, characterized in that (a) a device having a rotating shaft parallel to each other is used, and the first drying of the film forming device is performed. Lightly, the film-forming raw material containing the film-forming compound is discharged into a film shape, and after partial dry welding, the drying of the film is dried and the film is dried, and the film is formed; at this time, the week of the drying roll is made at 00 When the velocity (St) is 13% by mass relative to the film, the ratio of the thin polymer (ST/Sl) is o.mm 〇5〇; the peripheral speed of the drying roll (Sl) 201244914 (4) The final drying The drying speed of the rotating peripheral speed (Sl) relative to the polyvinyl alcohol-based polycrystalline film when the volatile matter ratio is 13% by mass

The ratio (SL/ST) is 0.960 to 0.980; 'T (d) is the ratio of the peripheral speed (Sl) of the final drying roll to the speed (S) of the second drying roll (SL/S丨) is 0.970~ 1.010. (5) The method of (4), wherein the vinyl alcohol-based polymer film has a volatile matter ratio of 17 to 3 % by mass when peeled off from the i-th drying roll. (6) The manufacturing method according to (4) or (5), wherein each of the drying reports: light surface &gt; the degree of the dish is 65 ° C or higher. ▲ Q) The manufacturing method according to any one of (4) to (6), wherein the film-forming stock solution containing the polyvinyl alcohol-based polymer has a volatile matter ratio of 6 〇 to 75 mass%, and a roll of the drying roll The surface temperature is 80 to 12 (rc, the first i: dry: the singular (Si) is 8 to 25 m / min. And, the present invention is: (8) a polarizing film, such as (1) to (3) [Production of the polyvinyl alcohol-based polymer film of any of the items] [Effect of the invention] The polyvinyl alcohol-based polymer film of the present invention has a high-strength extension and a stretch to produce an extended film, even if When the uniaxial stretching is performed at a high magnification, the film is broken, and the stretching process can be performed without interrupting the stretching operation. The illuminating film is excellent in low-performance and excellent in polarizing film such as polarizing performance. It is a polyvinyl alcohol-based polymer film of the present invention, and the film is used for the production of a polarizing film, etc., in the polyethylene 201244914 alcohol-based polymer film which has been conventionally used in the past, because it is about 3 〇. ~6 degrees, also has a high limit extension ratio, and can not break The rate is smooth and uniaxially stretched, and in this case, the manufacturing thinning is twice as thin as the thinning, which can shorten the manufacturing of the polarizing film welding; and the productivity is improved by the use of the &quot;dry& time and again 'As a full-volume film for a polarizing film, a polyethylene glycol having a length of more than 1 000 m is also used.] The ethylenic polymer film of the present invention is agglomerated by a agugu &amp; Since it has a 冋 ultimate stretch ratio, it can be extended at a higher rate than a known product, and the amount of the polarizing film from the polyvinyl alcohol polymer film is increased as compared with the conventional one. According to the production method of the system of the present invention, the method for producing the product can be continuously and continuously produced with high productivity and the polyvinyl alcohol-based polymer film of the present invention having the above-mentioned characteristics of yuri &amp;&amp; [Embodiment] The present invention will be described in detail below. It is known that a transparent film 'polymer chain produced by using a transparent polymer such as a polyvinyl alcohol polymer is plastically deformed by shear stress. Or skewed In the direction of flow (mechanical flow direction: length direction), the polarization directions of the atomic groups constituting the polymer are superimposed in a macroscopic manner, thereby producing a polymer-specific birefringence (Non-Patent Document 丨). The complex refractive index [?n(MD)] of the mechanical direction in the polymer film can be obtained by the following formula (1), and the complex refractive index [?n(TD)] in the width direction can be obtained by the following formula [?]. Δ n(MD)=: nMD-nz··· [i] -13- .201244914 △ n(TD)= nTD-nz...[ii] [wherein nMD represents the mechanical flow direction (length direction) of the film The refractive index 'nTD indicates the refractive index in the width direction of the film, and nz indicates the refractive index in the thickness direction of the film. In the film produced by using a transparent polymer such as a polyvinyl alcohol polymer, the polymer chain forming the film is easily aligned in the mechanical flow direction (longitudinal direction), including the above-mentioned Patent Documents 1 to 6 In the case of the polyvinyl alcohol polymer film described above, the polyvinyl alcohol polymer film generally has a "complex refractive index [Δ n (MD)] in the mechanical flow direction" &gt; "a complex refractive index in the width direction" The relationship of [Δ n(TD)], that is, the complex refractive index [Δ n (MD)] of the gas flow direction is larger than the complex refractive index [Δ n (TD)] in the width direction. The polyvinyl alcohol-based polymer film of the present invention is different from the conventional polyvinyl alcohol-based polymer film in the viewpoint of satisfying the following formulas (I) and (II) Δ n (MD) Ave_ 〇.lxl(r3s Δ n(TD)Ave$ Δ n(MD)—+ 〇·25χ1〇_3 (1) △ n(TD)AveS 2.5xl〇_3.·. (ιι) [in the above formula △ n(MD)Ave indicates that the complex refractive index in the mechanical flow direction of the polyvinyl alcohol-based polymer film is averaged along the thickness direction of the film. Δn(TD)Ave indicates that the poly 7 gram ethylene polymer film is formed. The complex refractive index in the width direction is averaged along the thickness of the film and in the thickness direction. 1 That is, as shown in the above formula (1), see the 'polyvinyl alcohol-based polymer film of the present invention (hereinafter "Polyvinyl alcohol" has ',

„ Temple δ is already loaded with “P VA”), and the mechanical flow of the p VA-based polymer film is in the direction of the production line when the PVA-based polymer-14-201244914 film is continuously produced. [The following is sometimes described as " The complex refractive index in the longitudinal direction (MD) is averaged along the thickness direction of the film, "Δ n (MD) AveJ' and the width direction of the PVA-based polymer film (perpendicular to the direction of the longitudinal direction) [hereinafter sometimes The complex refractive index described as "width direction (TD)"] is equal to or smaller than the mean value of the film in the thickness direction of the film, or the amount exceeding the "Δη(ΤΙ)) Ανβ" is small. Further, the PVA-based polymer film of the present invention satisfies the above formula (II) and also satisfies the characteristics of the above formula (II). By satisfying the above formulas (1) and (II), the PVA-based polymer film of the present invention has a high ultimate stretch ratio even when the thickness of the film is thinner than in the prior art, thereby producing an extended film such as a polarizing film. In the case of the uniaxial stretching at a high rate, the film is not easily broken, and the elongation of the film is not interrupted, and the optical performance such as the polarizing performance can be improved with high productivity and productivity. The stretch film. If the above formula (I) is not satisfied, the ultimate stretching ratio of the PVA-based polymer film is lowered, and when the uniaxial stretching is performed at a high magnification, the film is likely to be broken, and particularly when the film thickness is thin, cracking easily occurs. The PVA-based polymer film of the present invention preferably satisfies the following formula (1,). It is preferable to satisfy the following formula (Γ,), and it is more preferable to satisfy the following formula (?,,). △ n(MD)Ave-〇.〇5xl〇-3g △ n(TD)Ave$ Δ n(MD)Ave + 〇·23χ1〇-3 (I,) Δ n(MD)Ave^ Δ n(TD )Ave^ Δ n(MD)Ave+ 〇.2xl〇*3... -15- (I,,) 201244914 △ n(MD)Ave+ 0_05xl0-3S A n(TD)Ave$ △ n(MD)Ave + 0.18xl0·3... (Γ)) And if the Δ n(TD)Ave of the PVA polymer film exceeds 2. 5χ10·3, the limit extension of the PVA polymer film is not satisfied. The decrease in the magnification is difficult to extend the PVA-based polymer film at a high magnification in the longitudinal direction (md), and it is difficult to obtain an extended film excellent in optical properties. Since the Δ n(TD)Ave is excessively reduced, the PVA-based polymer film is At the time of manufacture, it is necessary to allow dry shrinkage in the width direction, and the effective width yield of the PVA-based polymer film tends to decrease. Therefore, the PVA-based polymer film of the present invention preferably has a Δ n(TD)Ave of 15 χ. The range of 10_3 to 2.2xl0·3 is more preferably in the range of ι·6χ10-3~2 〇χ1〇-3. The PVA-based polymer film of the present invention is other than the above formulas (1) and (π). Jiawei further satisfies the following formula (III): 1.3χ1〇·3$ △ n(MD)AveS 2_〇xl〇·3 (ΙΠ) By the Δ n (MD) Ave of the PVA-based polymer film being 2.0×10 −3 or less, the ultimate stretching ratio of the PVA-based polymer film is further improved. It is easy to extend the PVA-based polymer film at a high magnification in the longitudinal direction (MD), and it is easier to obtain an extended film excellent in optical properties. On the other hand, in order to make the PVA-based polymer film have a Δ n (MD) Ave lower than 1 3χ1〇·3, since it is necessary to greatly reduce the peripheral speed ratio of the drying roll, the PVA-based polymer film tends to be loosened between the drying rolls at the time of film formation. The PVA-based polymer film of the present invention, Δ n The (MD) Ave is preferably in the range of 1.4X10-3 to 1.95X10.3, more preferably in the range of 15χ1〇-3~ΐ 9χΐ〇.3. -16- 201244914 Further, the PVA polymer film is The width direction (TD) of the film, Δ n(MD)Ave and/or Δ n(TD)Ave often change, especially at both ends of the width direction, A n(MD)Ave tends to increase, but at least In the central portion of the width direction (TD) of the PVA-based polymer film, it is preferable that the formulas (1) and (II) are satisfied to satisfy the formulas (I) to (III), and P The center portion of the width direction (TD) of the VA-based polymer film satisfies the formulas (1) and (11) as the entire portion of the width direction (TD) of the center, and preferably satisfies the formula (I)~ (III). The both end portions of the width direction (TD) of the PVA-based polymer film which do not satisfy the formulas (1) and (11) can be cut off (trimmed) before extending the Pva-based polymer film in the longitudinal direction (MD). . r Δ n (MD) Ave of the PVA-based polymer film [the complex refractive index of the longitudinal direction (MD) of the pVA-based polymer film is averaged along the thickness direction of the film] and "ΔnJDKve" [PVA polymerization The complex refractive index in the width direction (TD) of the film is averaged along the thickness direction of the film, and can be measured by the following method. (1) Δ n (MD) Ave measurement method: (The measurement method of Δ n (MD) Ave in the center of the width direction (TD) of the PVA polymer film is exemplified here.) (i) In the PVA system In the longitudinal direction of the polymer film (any position of md, as shown in Fig. 1(a), a narrow strip of MDxTD = 2 mm x 10 mm is cut out from the central portion of the film width direction (TD), and the strip is made to have a thickness of ΙΟΟμηη The PET film is clamped on both sides and then clamped in a wooden frame and mounted on the microtome device. (ii) Next, the narrow strip to be taken in the above, as shown in Figure 1 (b) (not shown) The PET film and the wooden frame are parallel to the longitudinal direction of the strip (MD) 201244914 and sliced at intervals of 1 Ομπι to prepare one observation slice (MDxTD=2ιηπιχ10μιη) shown in (c) of the first figure. Among the slices, five sections with smooth cut surfaces and no slice thickness unevenness were selected, and each was placed on a slide glass, and the slice thickness was measured with a microscope (manufactured by Keyence). Further, the observation system was 10 times in the eyepiece and 20 times in the objective lens (overall). (200 times) the field of view is carried out. (iii) Secondly, in the manner of being able to observe the cut surface, such as the first As shown in (d), the slice was placed down with the cut surface facing up, placed on a glass slide, sealed with a cover glass and Shixia oil (refractive index 1. 〇4), and a two-dimensional photoelastic evaluation system was used. PA-micro" (manufactured by Photonic Lattice Co., Ltd.) measures the phase difference of five slices. (iv) The phase difference distribution of each slice appears in the state of the measurement surface of r pA micr〇" By cross-cutting the slice, the line α perpendicular to the surface of the original film is drawn, and the line is analyzed on the line segment a to obtain the phase difference distribution data in the thickness direction of the film. Further, the observation line is 1 times in the eyepiece and 20 times in the objective lens. In addition, in order to suppress the error of the position change of the line segment α passing through the slice, the 3 〇〇 pixel is used as the average 値 of the phase difference of the line width. (v) will be described above. The phase difference distribution in the thickness direction of the obtained film was divided by the thickness measured by a microscope, and the complex refractive index Δ n (MD) distribution in the thickness direction of the film was determined, and the complex refractive index Δ n in the thickness direction of the film was used. MD) the average of the distribution. Further The average 値' of the complex refractive index Δ“Μ” distribution in the thickness direction of each film obtained for the five slices is referred to as “Δ n(MD)Ave.” 201244914 “2” Δ n(TD)Ave measurement method: (The measurement method of Δ n (TD) Ave in the center part of the width direction (TD) of the PVA type polymer film is shown here.) (i) In the longitudinal direction of the PVA type polymer film (MD position, As shown in FIG. 2(a), a narrow strip of MDxTD=l〇mmx2 mm is cut out from the central portion of the width direction (TD) of the film, and the strip is sandwiched by a PET film having a thickness of 100 μm, and It was further lost in a wooden frame' mounted on a micro-microtome device. (ii) Next, the narrow strips taken as described above, as shown in Fig. 2(b) (PET film and wooden frame not shown), are sliced at intervals of 10 μm parallel to the width direction (Td) of the strips. , one of the observation slices (MDxTD = 10μηιχ2πιπι) shown in (c) of Fig. 2 was produced. From the sections, 潠屮c y % ® 5 slices having a smooth cut surface and no slice thickness unevenness were placed on a glass slide, and the slice thickness was measured with a microscope (manufactured by Keyence). Further, the observation was carried out in the field of view of 10 times the eyepiece and 20 times the objective lens (200 times as a whole). (iii) Next, 'Put the section as shown in (d) of Figure 2 in a way that can observe the cut surface. Place the cut surface up on the slide, cover slip and Shixia oil (refractive index 1.04) Sealing 'The phase difference of five slices was measured using a two-dimensional photoelastic evaluation system "PA-microj (manufactured by Photonic Lattice Co., Ltd.). (iv) The phase difference distribution of each slice appeared in the measurement of "PA_micr〇" In the state of the surface, a line perpendicular to the surface of the first film is drawn in a cross-section, and the line is analyzed on the line/3 to obtain phase difference distribution data in the thickness direction of the film. Further, the observation was performed on the field of view of the eyepiece 1 times and the objective lens (200 times as a whole). In addition, in order to suppress the error of the position change of the line segment /9 on the ° slice 201204414, the line is 3 〇〇 pixels as the average of the phase difference of the line width. (v) dividing the phase difference distribution in the thickness direction of the film obtained above by the thickness measured by a microscope, and determining the complex refractive index Δ n (TD) distribution in the thickness direction of the film, and using the thickness direction of the film The average 値 of the complex refractive index Δ i ^ CTD) distribution. The average 値 of the complex refractive index ^ TD distribution of each film thickness direction obtained for 5 slices is obtained as "△ n(TD)AveJ. Γ V/\ ”, 啊~/-r owed The range of N Shi 3~J 5 〇μηι' is in the case of a whole film as a polarizing thin film, preferably 30 to 65 μm. The ρνΑ polymer film of the present invention has a high limit

The stretching ratio is such that the film thickness of the film is equal to the thickness of the film used for the polarizing film of about 75 um. The PVA-based polymer film is thinner, and the aforementioned 3 〇 to 65 _ _ can not occur. The rupture of the film is extended at a high magnification, whereby it can be manufactured in a local yield, a flow rate, a good degree of productivity, and a good productivity, and it is known that the polarizing property is equal to or higher than that of the conventional alpha. A pre-existing-equivalent optical property of the stretched film, and by extending the thick 廑 &amp; degree 30~65Pm PVA-based polymer film at a 咼 magnification, the extended film is selected by y 'finishing edge degree k is thinner in the past, and at the same time it can shrink the drying time of the light film, &quot;I&amp; biased PVA ^ human rising polarizing film manufacturing speed. The thickness of the poly-δ film is too thick, and the production is not easy to dry quickly. When the thickness of the film is too thin, the film of the PVA-based polymer film is likely to be broken. &amp; uniaxial extension of the polarizing film, the pva system of the present day and the month of the present day, because the width of the liquid crystal TV or compound monitoring film is not particularly limited, the screen becomes larger and larger, but for -20- 201244914 It is effectively used for this purpose, and the width is preferably 2 m or more, more preferably 3 m or more, and even more preferably 4 m or more. Further, when the polarizing plate is produced by an actual production machine, if the width of the film is too large, it is difficult to uniformly uniaxially extend. Therefore, the width of the PVA-based polymer film is preferably 8 m or less. The PVA-based polymer film of the present invention has a mass swelling degree of preferably from 180 to 250%, more preferably from 185 to 24% by weight, and from 19 to 23% by weight, more preferably, the quality of the PVA-based polymer film is excessively swelled. When it is low, it is difficult to extend, and it is difficult to produce a stretched film having excellent optical properties. On the other hand, if the right mass is too high, the passability of the step may be deteriorated, and a high-precision polarizing film may not be obtained. The mass swell degree referred to herein means the percentage of the mass obtained by immersing the PVA-based polymer film in 3 〇t distilled water for 30 minutes, and dividing the mass obtained by drying at 105 ° C for 16 hours after the immersion. Specifically, 'can be measured by the method described in the following examples. The PVA-based polymer which forms the PVA-based polymer film of the present invention may, for example, be a PVA obtained by saponifying a polyvinyl ester obtained by polymerizing a vinyl ester, or a copolymerized comonomer of a main chain of pVA. a modified PVA-based polymer, a modified PVA-based polymer produced by saponifying a modified polyvinyl ester obtained by copolymerizing a vinyl ester and a comonomer, and an unmodified PVA or a modified pva-based polymer A part of the hydroxyl group is a so-called polyvinyl acid-reducing resin obtained by crosslinking an aldehyde such as formalin, butyl aldehyde or benzofural. When the PVA-based polymer forming the PVA-based polymer film of the present invention is a modified PVA-based polymer, the amount of modification of the PVA-based polymer is preferably j 5 % by mole or less, more preferably 5% by mole or less. 201244914 Examples of the vinyl ester used in the production of a PVA-based polymer include vinyl acetate, vinyl phthalate, vinyl laurate, vinyl propionate, vinyl butyrate, tridecyl vinyl acetate, and tertiary carbonic acid. (versatic acid), ethyl stearate, vinyl benzoate, etc. These vinyl esters can be used singly or in combination. Among these vinyl esters, vinyl acetate is preferred from the viewpoint of productivity. Further, examples of the comonomer include olefins (α-olefins, etc.) having 2 to 30 carbon atoms such as ethylene, propylene, 1-butene, and isobutylene; acrylic acid or a salt thereof; decyl acrylate, ethyl acrylate, and acrylic acid. Acrylates such as n-propyl ester, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, octadecyl acrylate (eg acrylic acid) Carbon number 1 to 18 alkyl ester); mercaptoacrylic acid or a salt thereof; decyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate , methacrylates such as isobutyl methacrylate, tert-butyl methacrylate, 2-ethylhexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate (eg methyl Carbon number of acrylic acid 1~18 alkyl ester); acrylamide, hydrazine-methacrylamide, hydrazine-ethyl acrylamide, hydrazine, hydrazine-dimercapto acrylamide, diacetone acrylamide, propylene Indole propane sulfonic acid or its salt, acrylamidopropyl dimethylamine or Acrylamide derivative of salt, hydrazine-hydroxydecyl acrylamide or a derivative thereof; mercapto acrylamide, hydrazine-methyl methacrylamide, hydrazine-ethyl decyl acrylamide, methyl a mercapto acrylamide derivative such as acrylamide or sulfonium sulfonic acid or a salt thereof, mercaptopropenyl propyl decylamine or a salt thereof, hydrazine-hydroxymethyl decyl acrylamide or a derivative thereof; N-vinylamines such as vinylformamide, oxime-vinylacetamide, oxime-vinylpyrrole-22- 201244914 rancidinone; mercapto vinyl ether, ethyl vinyl ether, n-propyl ethylene Ethylene, isopropyl vinyl ether, n-butyl vinyl ether, isobutyl vinyl ether, second butyl vinyl ether, dodecyl vinyl ether, stearyl vinyl test, etc. Nitriles such as acrylonitrile; ethylene glycol, partial ethylene, ethylene fluoride, hexaethylene, etc.; allylic compounds such as acid propylene vinegar and propylene; Malay a derivative of an unsaturated monocarboxylic acid such as acid or itaconic acid, a salt thereof or an ester thereof; a vinyl styrene compound such as a vinyltrimethoxylate; an isopropenyl acetate; and an unsaturated sulfonic acid or Derivatives, etc. Among these, α-olefin is preferred, and ethylene is particularly preferred. The y-average degree of polymerization of the PVA-based polymer forming the PVA-based polymer film of the present invention is preferably 1000 or more, more preferably 15 or more, from the viewpoint of the polarizing performance and durability of the obtained polarizing film, and 2 The upper limit of the average degree of polymerization of the PVA-based polymer is preferably 8,000 or less from the viewpoints of easiness and extensibility of the PVA-based polymer film. 6〇〇〇 or less. Here, the "average degree of polymerization" of the PVA-based polymer in the present specification means the average degree of polymerization measured in accordance with JIS K6726-1994, and the PVA-based polymer is further saponified and purified from 3 Torr. Determine the ultimate viscosity of the water in the sputum. The degree of recombination of the Pva-based polymer forming the PVA-based polymer film of the present invention is preferably 95% by mole or more, and more preferably 98% by mole, from the viewpoints of polarizing performance and durability of the obtained polarizing film. More than %, more preferably 99.0 mol% or more, and most preferably 99. 3 mol% or more. -23- 201244914 Here, the "information" of the PVA-based polymer in the present specification means a relative entanglement with respect to a vinyl alcohol unit which can be converted by saponification. The ratio of the molar number of the structural unit (typically a vinyl ester unit) to the vinyl alcohol unit and the number of moles of the vinyl alcohol unit (% by mole). The degree of saponification of the PVA-based polymer can be measured in accordance with the description of JIS K6726-1994. The method for producing the PVA-based polymer film of the present invention is not particularly limited, and the PVA-based polymer film which satisfies the above formulas (1) and (1) can be produced by any method, but the pvA-based polymer of the present invention can be produced. The membrane comprises: (aH 吏 a plurality of drying roller devices having a rotating shaft parallel to each other) in the first drying jet of the film forming apparatus, h... discharging a membrane liquid containing a PVA-based polymer as After the film is formed and partially dried, the drying roller of the : is further dried and formed into a film; at this time, -, (b) the peripheral speed (St) of the drying roll is 胄13 mass qi ... σ film with respect to the pv volatility The value (W) is G.99W. (4); ^ (4) The peripheral speed (SO ratio (4) makes the final dry _ of the peripheral speed (Sl) relative to the film volatiles # &amp; t, va polymer thin ^ When the knife rate becomes 13% by mass, the screen value of the team is 0.960~〇.98〇; the ratio of the peripheral speed (ST) of the fortunate ratio (d) is the ratio of the peripheral speed (S,) of the final drying roller. (s /su Λ q ) is manufactured in accordance with the circumference of the first drying roll (h/Si) of 0.970 to 1. 〇1〇. The PVA of the present invention described above is specifically described below. κ. Method for producing conjugated 臈, -24- 201244914 A film-forming stock solution containing a PVA-based polymer, which can be mixed with a liquid medium by a pvA-based polymer The solution is prepared by melting a polymer pellet containing a liquid medium or the like into a melt. The PVA-based polymer is dissolved in a liquid medium, a liquid-containing medium, etc.::: Mixed type, q Khan, such as: water, dimethyldiphenyl, dimethylformamide, dimethylacetamide, like methyl... didiamine, diethylenetriamine, etc., such liquids The medium may be used alone or in combination of the above. Among these, water, disulfoxide, or a mixture of the two is preferably used, and water is particularly preferably used. From the promotion of the PVA polymer to the liquid medium From the viewpoints of the handling of the film during the filming process, the improvement of the solution or the melting, and the extension of the PvA-based polypethane obtained in the book, it is preferred to prepare the film. Adding a plasticizer. As a plasticizer, it is preferred to use a polyol, an alcohol, a glycerin, or a hydrazine. For example, bis glycerol, propylene glycol, diethylene glycol, trihexane diol, trimethylolpropane, etc. In the case of a single or different one, it is preferably used for glycerin, diglycerin, and two kinds of superior effects. * The amount of the addition of the plasticizer or the plasticizer is relative to the ρν portion.轫 Α θ θ 1 1 合物 合物 合物 1 1 1 1 1 θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ When the amount of the product is 100 parts by mass, if the plasticization is more than 30 parts by mass, the composition of the product is too soft and the workability is lowered. χ 之 PVA Polymerization-25- 201244914 From the manufacture of liters, the film-forming stock solution has no special sub-interfaces, and it is used as an anion, a sulphate sulphate anion, as a key, etc. , polyoxypropylene polyoxypropylene melamine type, non-ionic boundary 1 or combination: interface amount, preferably j is preferably 0.0 5, film-forming properties,: parts, interface; there will be operation Properties - range of properties; range of properties: antioxidants, such as acid-degraded diphenylbenzenesulfonate such as potassium laurate, etc. PVA-based polymer film, such as ph ν Δ ^ dry peeling PVA The surfactant is added to the viewpoint of the handleability of the polymer film ^ ^ κ depending on the film. As 界面, it is a kind of surfactant, 'but it is preferable to use an anionic agent. A sulphate type or a non-ionizing surfactant, a sulfate type or a smectic surfactant of an ester is suitably a nonionic surfactant, such as a polyoxyethylene oil-based polyoxyethylene octyl ether An alkyl phenylamine type such as an alkyl phenyl ether type or a poly- hydrazine, an alkyl guanamine type such as an alkylene laurate phthalamide such as polyoxyethylene lauryl amide, or a polypropylene glycol ether type such as polyoxyethylene. A surfactant such as an allyl phenyl ether oxime such as an alkoxylated olefin allyl phenyl ether such as oleic acid diethanolamine is suitable. These surfactants can be used alone or in combination. The amount of the agent added is preferably 1 to 1 part by mass, more preferably 〇 02 to 〇 5 parts by mass, to 0.3 parts by mass, based on 1 part by mass of the PVA-based polymer. If it is less than 质量.〇1 parts by mass, it is not easy to exhibit the effect of improving the dissociation. On the other hand, if it exceeds the enamel 1 ! The raw material is dissolved on the surface of the enamel film and becomes a cause of agglomeration, 'the case of falling' The PVA-based polymer film of the present invention may also contain various additives such as a stabilizer (for example, an external absorbent, a thermal stabilizer, etc.), a remelting agent, and an anti--26. 201244914 agglomerating agent, flame retardant , antistatic agents, lubricants, dispersants, fluidizers, antibacterial agents, etc. These additives may be used alone or in combination of two or more. The volatile matter ratio of the film forming stock solution used for the production of the PVA-based polymer film is preferably 60 to 75% by mass, more preferably 65 to 70% by mass, if the volatile matter ratio of the film forming solution is small, 6〇f When the amount is %, the viscosity of the film forming solution becomes 'except that it becomes difficult to filter or defoam, and the film itself becomes difficult. On the other hand, if the volatilization ratio of the film forming solution is more than 75 mass%, the viscosity becomes too low, and the uniformity of the thickness of the pvA polymer film may be impaired. Here, the "volatility of the film forming solution" referred to in the present specification is a volatility ratio obtained by the following formula [iii]. Volatile fraction of the film forming solution (% by mass) = { (Wa_wb) / Wa 丨 X 1 00... [iii] [Wa represents the mass of the film forming solution (g), and Wb represents the value of Wa(g) The mass (g) of the film-forming stock solution after drying for 16 hours in an electric heating dryer of l05 «t. ], a film forming apparatus having a plurality of drying rolls in which the rotating axes are parallel to each other in the production of a PVA system or a polymer ruthenium film, the number of drying parents is preferably 3 or more, more preferably 4 or more, 5 to 3 〇. Better yet. The plurality of drying rolls 'equivalently, for example, metal such as brocade, chrome, copper, iron, and unrecorded steel &gt; are preferable, and it is more preferable that a metal material which is not easily corroded on the surface of the roll and has a specular gloss is formed. Further, in order to increase the durability of the drying roll, it is more preferable to use a single layer such as a recording layer, a layer, a recording/composite alloy layer, or a drying roll in which two or more layers are combined and plated. -27- 201244914 The surface of each (four) roll of the plurality of drying rolls is more than 7 generations. And 1 &quot; good for 65 and the surface of the roll of each unaccompanied roller, for the button of the dry welding roller at the final step or close to it, as the heat treatment roller. Top: reported: surface temperature is 10. . . More preferably, it is 10. ~12. It is 4, but it is dry below 〇C. Book I is preferably a garment surface/dish of 100. In the film forming apparatus used in the present invention, the hot air drying apparatus has a hot air type drying drum as needed. ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, “Calling the use of known film-like discharge belts, such as T-slot molds, feeds, &amp; molds, etc., will contain p VA _ _ , (film-like casting)

The film-forming stock solution of the ...+ material is in the form of a film on the first dry powder. The liquid on the dry roll is spit out on the first drying roll to form a film-like liquid, and is dried on the first drying view. The poly-distribution rate is preferably 17 to 3 Gf / s ^° The swing is better for 18~28 quality 〇 / 夕 main I. More preferably, it is 17 to 29% by mass, and is peeled off from the first drying roll from the first dry welding _J point. When the fraction is lower than 17 f, the PVA-based polymer film has a volatilization/〇' which increases with respect to Δ with τ n and then, (D)Ave, Δ n(MD)Ave. When the amount of the 干燥 & & 剥离 剥离 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发 挥发The roll is difficult to peel off. Sometimes there is a tendency to break the spoon. -28-201244914 Here, the "volatility of a PVA-based polymer film or a PVA-based polymer film" in the present specification means a singularity fraction obtained by the following formula [iv]. Eight (% by mass) = { (Wc-Wd) / Wc} xl00 ... [iv] [In the formula, A represents the volatile matter ratio (mass / /) of the pVA-based polymer film or the pvA-based polymer film, Wc The mass (4) of the sample sampled from the pVA-based polymer film or the PVA-based polymer film is shown, and (4) indicates that the sample Wc (g) is placed in a vacuum dry inorganic material having a temperature of 5 rc or less and dried for 4 hours. (b) a p-film or a PVA-based polymer film formed from a film-forming stock solution prepared using a PVA-based polymer or a polyol (plasticizer) such as glycerin, a surfactant, and water, and the following is 4 hours. Under the conditions, when the V-degree is 5〇C and the pressure is under the condition of rolling, the main thing is that only water volatilizes, and other components other than water remain almost non-volatile and remain in the film or the like. Therefore, the PVA system Polymerization = the volatility of the polymer film, which can be obtained by measuring the water content (moisture rate) contained in the material _ when the ith drying roller is dried, from the viewpoint of uniform drying, the first drying The drying speed of the roller, etc. The surface temperature of the roller is preferably 80~12, which is 85~105C', and more preferably 盍C, more Jia Wenjia is 93~99 ° C. If the aging temperature exceeds l2 〇〇 C, then each surface is the surface of the roller. The shellfish 4 Μ is easy to foam, and the other C is on the first drying roller. The reason is less than 80. Without the knife, the grain is not peeled off -29- 201244914 The speed of the first drying roll (Sl) 'From the viewpoint of uniform drying, drying speed and productivity of PVA polymer film Preferably, it is 8 to 25 m/min, more preferably U~23 m/min, and even more preferably 14 to 22111/min. If the weekly speed (6) of the first drying pro is less than 8 m/min, the productivity is lowered and the birefringence is simultaneously On the other hand, if the peripheral speed (S1) of the first drying roller exceeds: widening, the drying on the U-drying roll tends to be insufficient, and the sputum is discharged into a enamel film. The p-containing V V is taken from the 制#, the sap tree, the VA 糸 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 In the first dry 焯 昆 昆 昆 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 薄膜 薄膜 薄膜 薄膜 薄膜The hot air is sent, and it is dried by PVA. From uniform drying, dry...=, heating is preferred to the first drying roll. When the hot surface is blown by the non-contact surface of the roll, it is the first drying of the film. The hot air of the second speed of 2 to 8 m/sec is blown in the entire area of the surface, and more preferably, if the wind is blown, the hot air is not t 8 m/sec for the first drying roller. Small, it is difficult to obtain the object of the present invention: : The wind speed of the wind passes over the A-type polymer film, the same: the condensation of water vapor at the limit extension ratio, 'the lightly dried, the finally obtained pv... the person drops into the P VA-based polymer film, and On the other hand, if it is correct: the first; On the other hand, the non-contact surface of the first drying roll is blown up, and it is difficult to obtain the "film" of the high ultimate stretch ratio of the wind speed of the pVA-based polymer in the present invention, and the PVA-based polymer finally obtained. Film -30- Accompanying this, dyeing is not 201244914. Thickness unevenness is likely to occur. 々 朕 朕 ^ Brother 1 dry... 'The temperature of the wind' from the dry selection of the island rate, dry evenly, 50~150 ° C, Better hair ^ good for 7 〇 ~ 12 (rc, and for the PVA-based polymer per primaries) the drying roller wind dew point temperature is more than the helmet, 〇 4 10~15 〇 C. If the gray film 1 Drying roller non-pile non-contact surface blowing hot air: Drying efficiency, uniformity ·, deer k Μ J dry knowledge, etc. are easy to reduce, and - easy to foam.,, for the PVA-based polymer film The method of sending the hot air is not particularly limited, and the first surface of the PVA-based polymer film can be used by the hot air of the hook, and it is preferable to use a nozzle method, a rectifying plate method or the like for the uniform blowing of the whole of the PVA-based polymer film. The first drying roller non-contact surface 4 of the polymer film may be non-contacted to the first drying roller In the direction of the surface, the i-th dry roll non-contact surface 3 of the seven-layer polymer film (substantially along the circumference of the roll surface of the 干燥1 drying roll), and the PVA-based polymerization on the first drying roll It is preferred that the PVA-based polymer is thinned and the hot air after blowing is exhausted by drying. The exhaust method preferably uses wind speed unevenness and temperature which do not generate hot air blown to the contact surface of the pvA-based polymer film. The occurrence of the problem, etc.; the viewpoint of the non-contact surface blowing of the roll is preferably &gt; 80 to 95 ° C. Further, the hot pVA-based polymer blown by the contact surface is too low in temperature, and if it is too high, it is too dry. The non-contact surface of the roller has a uniform blowing speed and the temperature of the drying roller is non-contact type, which is preferred, and the like. For the direction of the PVA to send the hot air, it may be in the direction of the circumferential shape of the PVA, or may be thin. When the crucible is dried, the volatilization of the film is not particularly limited, but the first drying roller is not a one-step method of exhausting. -31 - .201244914 PVA polymerization of a preferred quality on the first drying roll. Thinner; to the volatile fraction m. 剥离 peeled from the first drying roller, It is preferred that the non-contact surface of the PVA-based polymer film is oriented toward the second nip roller, and the drying is performed by the second drying roller. The peripheral speed of the second drying roller (8) The ratio of the phase...the peripheral speed of the roller (Sl) ^ l.UU5~l.〇9〇» f ΐί .(Π0Μ.080. If the ratio (S2/Si) is 1〇〇5, the film is from The peeling of the first &quot;drying roller will be easy to be uneven, and the wide refractive index unevenness will increase, sometimes it will benefit the film. Also, 芸tl·# π /〇, '乍 is the optical film The roll film has a 'right ratio (S2/Sl) exceeding U90, and the PVA-based polymer film of the present invention having a stretch ratio is obtained, "is extremely uniform when the second drying roll is dried, from the viewpoint of uniform drying speed, etc. 2 焯 镕矣 镕矣 ^ ^ ^ ” 干 干 钇 钇 钇 钇 roller roll surface temperature is preferably 65~100 C, more preferably 65~98. Oh, it's better for 75~96t. The PVA-based polymer film dried by the second drying roller is sterilized by the second: peeling, and the number of drying light is set in accordance with the film forming apparatus. Second: the third drying roll, the fourth drying roll, and the "drying view" The drying roller is sequentially dried. Number: At this time, in the present invention, the peripheral speed (ST) of the drying pro- gram of the volatile portion of the PVA-based polymer film is relative to the first drying. The ratio of the peripheral speed (6) (ST/SlM on·, while adjusting the tension applied to the polymer film introduced into the polymer film) is dried. Here, the porosity of the mirror A糸 polymer film becomes dry at a mass %. η"', when the volatility of the PVA-based polymer film is on the drying roll, it means that the drying roll has a volatile content of 13% by mass between two drying rolls -32 - 201244914. It means that among the two drying rolls, the drying roll is located at the back. By setting the ratio (St/Si) to the above range, the volatilization ratio of the pVA-based polymer film is 13% by mass, and the drying is less. There is no problem such as film relaxation or entanglement, and the complex refractive index along the length direction (MD) can be smoothly The 复[Δ n(MD)Ave] and the width direction (TD) of the film are averaged in the thickness direction of the film, and the 复[Δn(TD)Ave] is averaged in the thickness direction of the film to satisfy the above formulas (1) and (1). Further, the PVA-based polymer film of the present invention of the above formula (10) is further satisfied. The ratio (ST/S1) when the PVA-based polymer film is produced is preferably 1.000 to 1.045. In the present invention, the core polymer film having a volatile content of 13% by mass is dried in a subsequent drying roll. To produce a pvA-based polymer film. In this case, the ratio of the peripheral speed (Sl/St) of the peripheral speed (ST) of the drying roll to the valence fraction of the PVA-based polymer film is 3% by mass. 4 G 96 () to Q 98 范围 range - while drying. By setting the ratio (sl/st) to the above range, the drying step until the PVA-based polymer film is finally obtained does not cause film relaxation or entanglement, etc. The problem is that 値[Δη (Μυ and the complex refractive index in the width direction (TD) are averaged along the thickness direction of the film by averaging the complex refractive index in the longitudinal direction (md) in the thickness direction of the film [△] lUTDUve] The PVA-based polymer film of the present invention satisfying the above formula (III) and further satisfying the above formula (III). The ratio (SL/ST) when the PVA-based polymer film is produced is preferably 0.963 to 0.976. ° • 33- 201244914 Further, when the PVA-based polymer film is produced by the above method, the complex refractive index in the longitudinal direction (MD) of the octa-based polymer film is averaged along the thickness direction of the film [Δ n ( MD)Ave] and the complex refractive index in the width direction (TD) along the thickness of the film Directional averaging [△ n(TD)Ave], in response to the ratio of the peripheral speed (Sl) of the first drying roller to the peripheral speed (Sl) of the final drying roller (ls), It is necessary to produce a PVA-based polymer film of the present invention which satisfies the above formula (111), and it is necessary to make the peripheral speed (S1) of the final drying roll relative to the peripheral speed of the first drying roll. The ratio (S1/S丨) of (Si) is in the range of ο.πΜ.οΜ, preferably in the range of 〇·972~i·008, and more preferably in the range of 0.975 to 1.006, thereby suppressing wrinkles or The occurrence of slack is smoothly produced while (1) and (11), and the above step (111) is satisfied. The VA system is f 2, and the manufacturing method of the present invention is described, and the final drying is near or near the final heat: The second final drying roll can also increase the surface temperature as a degree. When using a drying roll as a heat treatment roll, the surface temperature is preferably 90 to 140, more preferably 1 to U (rc). The heat treatment device can also be provided separately from the dry pro. The final drying process of the polymerization is light, drying the PV "dry PVA pregnancy a two": In particular, it is limited to 'but from the point of view of the film which is more uniform, it is preferable that the P VA-based polymer is thin and dry, and the way of drying each is the same as that of the first to the hottest place. Wherein: a polymer film, which is roll-shaped as needed, to obtain a PVA of the present invention: a PVA-based polymer film which is wound into a zirconium by a predetermined length. -34- 201244914 By the above-mentioned series of processes, The volatile matter ratio of the obtained pv A-based polymer film is preferably in the range of 丨 to 5% by mass, more preferably in the range of 2 to 4% by mass. The polarizing film is produced from the PVA-based polymer film of the present invention. For example, the PVA-based polymer film can be dyed, uniaxially stretched, fixed, and dried, and further heat-treated as needed. The dyeing and uniaxial stretching = order is not particularly limited, and the dyeing treatment may be performed before the uniaxial stretching treatment, or may be performed at the same time as the uniaxial stretching treatment or after the uniaxial stretching treatment. Further, the steps of uniaxial stretching, dyeing, etc. can be repeated several times. As a dye for dyeing a PVA-based polymer film, a moth or a dichroic organic dye can be used (for example, direct black i 7, 19 '丨54; direct standard 44, 106, 195, 210, 223; direct red 2 23, 28, 31, 37, 39, 79, 81, 240, 242, 247; direct blue i, 15, 22, 78, 90, 98, 151, 168, 202, 236, 249, 270; direct purple 9, 12, 51, 98; direct green i, 85; direct yellow 8, 12, material, 86, 87; direct orange 26, 39, 106, 107 and other dichroic dyes). These dyes may be used alone or in combination of two or more. The dyeing can be usually carried out by immersing the PVA-based polymer film in a solution containing the above dye, but the treatment conditions or treatment methods are not particularly limited. The uniaxial extension of the PVA-based polymer film extending in the longitudinal direction (MD) can be carried out by either a wet stretching method or a dry heat stretching method. When uniaxially extending by the wet stretching method, it may be uniaxially stretched in warm water containing boric acid, or may be uniaxially stretched in a solution containing the dye or in a fixed treatment bath described later, or a p VA system after water absorption may be used. The polymer film is stretched in the air -35- 201244914. The sleeve can also be stretched. The degree of uniaxial stretching treatment is not particularly limited, but when pvA compound == extension (wet extension) in warm water, it is preferably 3 〇 to 9 〇t, more preferably 4 〇 to 7 〇 C'. More preferably 45~65. "On the eve, the ceremony uses 50~ 夕 瓜, 皿度, dry heat extension, preferably the temperature of C. Again, uniaxial _ π 4 — gg ± God, 狎 treatment of the extension ratio 'To extend the magnification ratio', from the polarizing performance: =, preferably extending as far as possible until the film is about to be cut into a body, preferably 4 pulls ^ 4 times or more 'more preferably 5 times or more, and more Preferably 5.5 times or more. The extension rate ^, the upper limit of the armored sheep, as long as the film is limited, but for the sake of the spoon, whoever 耔 呷 呷 呷 呷 呷 呷 呷 呷 特别 特别 特别 特别 特别 特别 特别 特别 特别 , , , , , , , , , , , 〇倍倍。 The film after stretching (polarized film) is 20~3〇μΐη. It is 5~35μιηη, especially when making polarized thin material, in order to make the dye adsorption to uniaxially stretched, it will be more than ~ Membrane Luo, Xi will enter the fixed treatment. Fixed treatment, a wide range of methods are used to film, sound, Tianshi and film / / shell in the addition of boric acid and / or boride reasonable bath. When it is possible, it is also possible to add a iodination to the treatment bath as needed: uniaxial extension Rational, or uniaxial stretching treatment _ 畑, ^ 接 仃 知 知 ( (heat treatment drying treatment (埶 treatment) temperature is 30 ~ Fu, especially good for W. The temperature of some (heat treatment) is too low, obtained The second place is easy to reduce. On the other hand, if it is too high, then the density is reduced. The water quality of the solution can be transparent on both sides or one side of the polarizing film. A protective film made of mechanical strength is used to form a polarizing plate. The second is -36- 201244914 The protective film at this time can use a cellulose triacetate (TAC) film, a cellulose acetate butyrate (CAB) film, or an acrylic film. , polyester film, etc.. Also used as a point coating for the protective film, generally using p V a

An adhesive or an urethane-based adhesive or the like is preferable, and among them, a pvA-based adhesive is preferably used. ^ The polarizing plate obtained as described above may be coated with an adhesive such as acrylic or the like, and then bonded to a glass substrate to be used as a component of a liquid crystal display device. When the polarizing plate is bonded to the glass substrate, a phase difference film, a viewing angle lifting film, a brightness enhancement film, or the like may be bonded at the same time. [Examples] - The present invention will be specifically described below by way of Examples, but the present invention is not limited by the Examples. In the following examples and comparative examples, the volatility of the film forming solution, the volatility (water content) of the ρν 膜 film or the PVA film, the physical properties of the pvA (4), and the optical properties of the polarizing film were measured by the following methods. (1) Volatile fraction of the film forming solution: According to the above method, it is obtained by the above formula [Hi]. (2) Volatile fraction (water content) of the PVA film or the PVA film: Determined by the above formula [iv] by the above method. - The measurement of the volatility (moisture rate) of the bismuth film * PVA film is carried out using a sample sampled from the center of the width direction (TD) of the A film or the PVA film. (3) Δ n(MD)A^ of the PVA film: Δ n(MD) ^^Γ(1&gt;&gt; Λη(中央) of the central part of the width direction (TD) of the PVA thin gland Μ〇)Ανβ.^^^0 ...and 'this is used as the Δ slave of the PVA film.' -37- 201244914 (4) Δ n(TD)Ave of the PVA film: the width direction of the PVA film (TD) The Δ n(TD)Ave at the center is obtained by the above method of the item "Measurement method of "2" Δ n (TD) Ave", and this is referred to as an (TD) Ave of the PVA film. The quality of the PVA film is swelled: The PVA film is cut into 1.5 g at 30. (: 1000 g of distilled water is crushed for 30 minutes, and after pouring for 3 minutes, the pvA film is taken out, and the surface water is absorbed by the filter paper. The mass (We) was measured, and then the pvA film was dried in a dryer at 105 ° C for 6 hours, and then the mass (wf) was measured. From the obtained mass 1 We and the following formula was obtained. The quality of the film is swollen. Moisture (%) = (We/Wf)xl〇〇...[v] (6) Limit stretching ratio of PVA film: The width direction (TD) of the pvA film before stretching obtained from the following examples or comparative examples The test piece of the center portion sampling length direction (md) x width direction (TD) = 10 cm x 5 cm 'fixes both ends of the test piece in the longitudinal direction to the extension tool' so that the size of the extension portion becomes the length direction... noisy width direction (TD Bu 5cmx5cm, during the dipping in the water of the machine for 38 seconds, the uniaxial extension along the length direction at an extension speed of 12 coffee/min (the extension of the section) is 22 times of the original length, and then immersed in the concentration. The erbium/deuterated potassium aqueous solution of the temperature machine containing 0.G3 mass% and molybdenum potassium 3% by mass was uniaxially extended in the longitudinal direction (MD) at a rate of i2 cm/min during a period of 90 seconds (2nd) The stage length is the original length:: two: the second is in the period of (10), -38-201244914 in the boric acid/wei potassium aqueous solution at a concentration of 3 mass% of the acid and potassium iodide, U 12cm. / The extension speed is uniaxially extended along the length direction (MD) (the third stage extension) is the original 3 times of the length, and then immersed in a boric acid/potassium iodide aqueous solution having a concentration of about 60% in a concentration of 4% by mass and 4% by mass of strontium oxide, and extending along the length direction at an elongation rate of i2 cm/min. The shaft was extended until the test piece was broken, and the stretching ratio at the time of fracture of the test piece (the ratio of the length at break to the ratio of ^) was read. For the same PVA film, I promoted c k, 溽臊 溽臊, and carried out the above extension test 5 times, and took the average 値 as the limit extension ratio (times) of the PVA thin 。. (7) Optical properties of the polarizing film: U) Transmittance: Parallel to the polarized light, in the central portion of the width direction of the polarizing film obtained by the mediation of the following example or comparative example, θ10 You &amp;# (7) Sampling 2 pieces of 1.5cmxl.5cm square samples in the direction of alignment of the thin brothers, and using the spectrophotometer V-71〇〇 made by Hitachi, Ltd. (attached eight, seven, (with the knife ball), according to JIS Z8722 (measurement method of object color), the visibility correction of the visible light region of the C light source and the field of view is performed, and the transmittance of the polarized film is measured at a tilt angle of 45 degrees with respect to the direction of the extension axis for one polarized film of the nine-dimensional film. Flat and oblique light transmittance at -45 degrees, and find the average 値(γ丨). For another polarized film sample, also as described above, the light transmission is measured at a tilt of 45 degrees. The rate and the transmittance of the ^^ degree, and the average 値(γ2) of this. The average hand-clothing average is γ丨 and γ2 as the above (γ) (%). Transmittance -39- 201244914 (ii) Polarization: 2 samples of polarizing film sampled in (i) above In the same manner as the above-described measurement method of the transmittance, the light transmittance (Yll) when the alignment direction is made parallel, and the light transmittance (Υ丄) when the alignment direction is vertical are measured. The partial degree (v) (%) is obtained by the following formula [vi]. The degree of polarization (v) (%) = {(γ II - γ 丄) / (Υ II + γ丄)} 1/2X100·. .

[Vi] (iii) Translucency of 44.25% of penetration: as described in the following examples and comparative examples, in each of the examples or comparative examples, in the case of changing the second stage of elongation in the aqueous solution of cerium/potent moth The five polarizing films produced by the immersion time were respectively subjected to the above methods to determine the transmittance (Y) and the degree of polarization (V). For each of the examples or the comparative examples, the transmittance (Y) was used as the horizontal axis and the degree of polarization. (V) As the vertical axis, five points are plotted on the graph, and an approximate curve is obtained. From the approximate curve, the 偏 of the degree of polarization when the transmittance (γ) is 44.25% is obtained. <<Example 1>> (1) Production of PVA film:

π ua 义 q Qiu 陥叩付; ^ pVA ^ degree 99 · 9 mole %, degree of polymerization 2) 100 parts by mass, glycerol 12 quality knows 'lauric acid diethanolamine 01 parts by mass and water swing% The membrane liquid was prepared, and the scorpion sheep 6 (^, the original liquid 攸T wedge was sputtered out to the first dry sputum (surface temperature 9.3. (:, Zhou Cheng r ς, !, you are fighting fast ( In the case of the squid, the squirrel of the squirrel is blown at a wind speed of 5 m / sec. The water content is 18% by mass, and next, -40-201244914 is peeled off from the first drying roll. The north side of any part of the PVA film is alternately contacted to the side of each drying roll: 2: : The temperature is about 85t, and finally the surface temperature is 108t. Thickness: 1 hot spot: roll) After heat treatment, the winding is obtained by thin kneading: Γ, and the volatile content is 3 mass%. In this example, the drying roller is the 7th dry when the second rate is 13% by mass. Roller. According to Example 1, (4) the peripheral speed of the drying roll (the seventh drying roll) when the volatile content is 13% by mass (s, , by /c, 々日耵%1) Week = (0 Ratio (ST/Sl) 4 U00; (4) Ratio of the peripheral speed (ST) of the drying roll (the first dry (four)) when the final material is (sL) and the volatilization rate of the phase material is $13% by mass (Sl/St ) is 〇 974; (r) the ratio of the peripheral speed (s2) of the second drying roll to the peripheral speed (Si) of the i-th drying roll is 1.030; (4) the next drying roll (the eighth drying light) The peripheral speed is the drying roller when the volatile fraction becomes &quot;% by mass (the ratio of the seventh dry peripheral speed (ST) (St/St+i) is 〇998; ") the peripheral speed of the final drying roll (6) 'The ratio of the peripheral speed (Si) of the 干燥i drying roll was 0.975, and the pvA film was produced. 1 (π) The Δ n (MD) Ave, Δ of the PVA film obtained in the above (i) was measured by the above method. n (TD) Ave, mass swelling degree and ultimate stretching ratio, and the results are shown in Table 1. (2) Production of polarizing film: (1) Sampling from the center of the width direction (td) of the PVA film obtained in the above (1) A test piece having a length direction (MD) X width direction (TD) = 1 〇 cm x 5 cm, and both ends of the test piece in the longitudinal direction are fixed to the extension tool so that the size of the extension portion becomes the length direction (MD) x the width direction TD) -41 - .201244914 = 5cmx5cm, uniaxially extending in the longitudinal direction (Md) at a stretching speed of 12cm/min during the dipping of water at a temperature of 3〇t (the stage is extended) After 2.2 times the original length, it was immersed in a concentration of 3 mass% of iodine and 3 mass% of moths, and the temperature of the 3rd generation moth/deuterium clock water solution was 60 seconds. The extension speed of the fraction is uniaxially stretched in the longitudinal direction (then), and is η times the original length, and secondly, the temperature is 3% in the concentration of the rotten acid and the mass of the iodine (3 mass%). During the period of about (9) seconds of TC's rotten acid/deuterium aqueous solution, the uniaxial extension (third stage extension) along the length direction (md) is 3.6 times the original length at the m/knife extension speed, and then, at the edge of Immersed in a concentration of boric acid of 4% by mass and an inhibitory potassium content of about 5% by mass. The temperature of about 10% of the shed 1/potassium iodide sulphate solution _ _ 卩 12 cm / min of the extension speed along the length of the direction of the Stage 4 extension) to the extent of the extension ratio before the limit extension ratio of the PVA ruthenium film measured above The amount % contains a molybdenum dissolving aqueous solution, which has a small impregnation heart, and is impregnated with a cerium ion, and then dried in a dryer of (10) for 4 minutes to produce a polarizing film (having a thickness of about 2 μm). The transmittance (γ) degree of polarization (v) of the polarizing film thus obtained is obtained by the above method, and the point is plotted on the axis of the transmittance (7) and the vertical axis is the degree of polarization (ν). (ii) In the above (1)', except that the time of impregnation in the breaking/cracking aqueous solution at a temperature of 3 〇C in the second stage is changed from seconds to 75 seconds, the same operation as in the above (1) is carried out, and each The extension speed in the extension stage is the same as (1) above, 4 i2 cm/min] polarizing film (thickness about 2 1 μηι). -42- 201244914 The transmittance (γ) and the degree of polarization (v) of the polarizing film thus obtained are obtained by the above method, and the point is drawn in the above (i). (iii) In the above (i), the same operation as in the above (1) except that the time of impregnation in the iodine/potassium iodide aqueous solution at a temperature of 3 ° C in the second stage was changed from 6 sec to 9 sec. , a polarizing film (having a thickness of about 2 1 μm) in which the stretching speeds of the respective extension stages are the same as (1) above (1), and the transmittance (γ) and the degree of polarization (ν) of the polarizing film obtained thereby. It is obtained by the above method, and this point is drawn in the above figure (i). (lv) in the above (1) ', except that the time of immersing in the aqueous solution of galvanic/potassium hydride at a temperature of 30 ° C when the second stage is extended is changed from 6 sec to ι 〇 5 sec, and (1) In the same operation, a polarizing film (having a thickness of about 2 1 μm) in which the stretching speed of each stretching stage is the same as (1) above (1) is obtained. 0 The transmittance (γ) and the degree of polarization of the polarizing film obtained thereby ( v) Find the point in the above figure (i) by the above method. (v) In the above (i), except that the time of immersing in the iodine/potassium iodide aqueous solution at a temperature of 30 ° C in the second stage extension was changed from 6 sec to 12 〇 seconds 'the same as the above (i) The polarizing film (having a thickness of about 2 1 μm) having the same stretching speed in each extension stage as the above (1) was 12 cm/min. The transmittance (γ) and the degree of polarization (ν) of the polarizing film thus obtained were determined by the above method, and the pattern of the above (i) was green. (vi) The approximate curve of the five points plotted on the graph in (1) to (v) above is plotted on the graph, and the degree of polarization (V) at which the transmittance (¥) is 44 25% is obtained from the approximate curve. After that, the list below! Shown as 99.98. -43-201244914 "Examples 2 to 5" (1) The film formation conditions in the case of producing a PVA film were changed to the following description of the first embodiment. A PVA film was produced in the same manner as in the first example (1). In the example 2', as the film forming stock solution, 100 parts by mass of pVA (saponification degree: 99.9 mol%, polymerization degree 240 0) obtained by containing saponified polyvinyl acetate, 12 parts by mass of glycerin, and lauric acid diethanol were used. A film-forming stock solution of 1 part by mass of amidoxime and 73% by mass of a volatile matter of water. The A n (MD) Ave, A n (TD) Ave, mass swelling degree and ultimate extension ratio of each of the PVA films thus obtained were measured by the above methods, and the results are shown in Table 1 below. (2) A test piece 'in the longitudinal direction (MD) x width direction (TD) = 1 〇 cm x 5 cm sampled in the center portion of the width direction (TD) of each PVA film obtained in the above (1), and Example 1 (2) performing the same operation, manufacturing five kinds of polarizing films for each of the examples' and obtaining the transmittance (Y) and the degree of polarization (V) of the respective polarizing films so that the horizontal axis is the transmittance (γ). And the vertical axis is a graph of the degree of polarization (V), which is an approximate curve of five points drawn on the graph in the graph, and the degree of polarization when the transmittance (γ) is 44.25% is obtained from the approximate curve. The result of (V) is shown in Table 1 below. Comparative Examples 1 to 5 (1) The film forming conditions in the production of the PVA film of Example 1 were changed to the following Table 2, and a PVA film was produced in the same manner as in Example 1 (丨). The Δ n (MD) Ave, Δ n (TD) Ave, mass swell, and ultimate extension ratio of the film obtained by each PVa method obtained by the above method were as shown in Table 2 below. 13-44-201244914 (2) Using the test piece in the longitudinal direction (MD) x width direction (TD) = lOcmx 5 cm of the center portion of the width direction (TD) of each PVA film obtained in the above (1), In the same operation as (2) of Example 1, five kinds of polarizing films were produced for each of the comparative examples, and the transmittance (Y) and the degree of polarization (V) of each of the polarizing films were determined, and the horizontal axis was penetrated. The rate (Y) and the vertical axis are the degree of polarization (&quot;V). The point is drawn. The approximate curve of the five points drawn on the graph is drawn on the graph, and the penetration rate (Y) is obtained from the approximate curve. The result is the polarization degree (V) at 44.25%, and the results are shown in Table 2 below. Table 1 Example 1 2 3 4 5 Volatile fraction of film-forming stock solution (% by mass) 66 73 66 66 66 1st dry thinking, 93 85 93 85 78 Temperature (°c) Weekly speed (S!) (m/min 16.7 11.0 16.7 12.3 12.3 Volatilization rate at the time of peeling (% by mass) 18 23 18 21 28 Roll number of 13% by mass of the volatile material No. 7 No. 5 No. 7 No. 5 No. 8 Temperature of the final roll (heat treatment roll) (° C) 108 109 108 109 109 The peripheral speed ratio of the drying roller is 0.975 1.006 0.986 1.006 1.006 Sl/S, (all) St/S, 1.000 1.045 1.012 1.045 1.030 Sl/St 0.974 0.963 0.974 0.963 0.976 ' S2/Si 1.030 1.050 1.030 1.050 1.050 St/St+i 0.998 0.990 0.998 0.990 0.998 Physical properties of PVA film 60 60 60 60 60 Thickness (μιη) Volatility (% by mass) 3 3 3 3 3 Δη (MD) Ave 1.5xl0-3 1.6X1CT3 1.7xl0' 3 1.8x10—3 1.9xl0'3 Δη ( TD) Ave ϊ.βχΐό-3 ι.'δχΐό-3 i.7xi0_3 iixio-3 'i.bxio'5 ultimate extension ratio (times) 6.94 6.82 6.72 6.94 6.80 Quality swelling Degree (%) 212 207 206 205 210 Properties of polarizing film 99.98 99.97 99.97 99.98 99.98 Polarising degree (penetration 44 · 25%) (%) -45- 201244914 Table 2 Comparative Example 1 2 3 4 5 Volatile fraction of film-forming stock solution (% by mass) 66 66 66 66 66 1st drying roll 85 93 93 85 85 Temperature (°c) Weekly speed (S!) (m/min 12.3 19 12.3 11.0 11.0 Volatile fraction at the time of peeling (% by mass) 21 24 18 19 19 Roll number of 13% by mass of volatile material No. 5 No. 9 No. 5 No. 15 No. 15 Temperature of the final roll (heat treatment roll) (° C) 109 108 109 108 108 Drying pro-cycle ratio 1.034 0.969 1.088 0.982 0.979 SJS, (all) St/Si 1.074 1.002 1.089 0.986 0.986 Sl/St 0.963 0.967 0.999 0.996 0.993 s2/s, 1.080 1.030 1.100 1.030 1.030 St/ St + i 0.990 0.996 0.990 0.993 0.990 PVA film properties 60 60 60 60 60 Thickness (μιη) Volatility (% by mass) 3 3 3 3 3 Δη (MD) Ave 2.0xl0-3 1.4X10-3 2.9xl0' 3 3.0χ10'3 2.7χ10-3 Δη ( TD) Ave i.8xi&quot;〇·3 i.7xib&quot;3 ϊ.ϊχίόΓ3 2Ϊ7χΓ〇&quot;3 2Ϊ8χϊ&quot;〇'3 limit extension ratio (times) 6.62 6.52 6.38 5.96 6.16 Mass swell (%) 206 213 207 207 206 Properties of polarizing film 99.96 99.96 99.95 99.93 99.94 Polarization ( Transparency 44 · 25%) (%) As seen in Tables 1 and 2 above, the PVA films of Examples 1 to 5 were obtained by making Δ n (MD) Ave [PVA film length direction (MD) The complex refractive index is averaged along the thickness direction of the film] and Δ n(TD)Ave [the complex refractive index of the width direction (TD) of the PVA film is averaged along the thickness direction of the film] satisfying the formula (I) and II), and having a high ultimate stretch ratio of 6.72 to 6.94, and the polarizing film obtained from the PVA film of Examples 1 to 5 has excellent polarizing performance equivalent to or higher than that of the conventional polarizing film. On the other hand, since the PVA films of Comparative Examples 1 to 4 did not satisfy the formula (I), and the PVA films of Comparative Examples 4 and 5 did not satisfy the formula (II), they were compared with the PVA films of Examples 1 to 5, The limit extension ratio of one is also low. -46 - .201244914 Polarization from PyA polymer thinner When the film is broken, the film is usually uniaxially stretched to avoid magnification, but extended by the extension ratio.

PVA of any of the film's ultimate extension ratios of 15] VA film leather: a high value of 6:72 or higher, and in the examples, the polarizing film can be produced at a ratio of 6 times or more. The /it? draw ratio is uniaxially stretched, and even if it is uniaxially stretched at a stretch ratio of AU, it can smoothly extend. The PV phase A of the ruthenium film occurred as follows: in Comparative Examples 1 to 5. Among the VA films, the condition of Comparative Example 4 was less than 6, so that in the case of the comparative example &amp; 埚 溥 film, the film could not be stretched by 6 times or more, and when stretched, the film was easily broken, and the ratio was (4). PVA has also been concerned with the viewpoint of film breakage at a stretching ratio of 6 times or more. In the case of binding, the polarizing film is a full-wound film, and the length of the roll has a roll length of 1 beat or more. However, for example, a PVA-based polymer film of a total length of 1 000 m has a limit stretch ratio of 0.1 point ( _(〇] times" means that the length of the stretch film which is uniaxially stretched is increased by 1〇〇m (1〇〇〇mx〇i times=100m), and more can be obtained from the same length of the whole roll film. The polarizing thinness was observed for Examples 1 to 5. The pvA film of the example had a higher limit magnification than the PVA film of Comparative Examples 1 to 5, and the maximum stretching ratio was 〇.1〇 to 0.98 points (times). Therefore, for example, the length of the PVA thin film is 1 〇〇〇m 'When the polarizing film is produced using the conditions of the above embodiment, the length of the polarizing film is increased as compared with the PVA film using Comparative Examples 1 to 5. 100~980m 'More polarizing film can be obtained. -47- 201244914 [Industrial use j] The PVA-based polymer film of the present invention, even if the thickness of the thin gland is 3 0~65μηι, the thickness of the medium is about 'seeking In the case, there is still a high limit extension and a uniaxial extension _ magnification at a high magnification when manufacturing a polarizing film or the like, that is, In the case of the breakage, the drying process can be performed without interrupting the drying process, and the drying time of the film is not easily shortened. The productivity is good. The production is longer than ever. The optical film such as polarizing performance is excellent in stretching film such as a polarizing film. π 咕 咕 作为 作为 作为 作为 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于 用于The method of the film is useful. [Fig. 1 (a) to (4) are schematic views showing a sampling method for measuring Δ n (MD) Ave of a polyvinyl alcohol polymer film. (a) to (4) are schematic views showing a sampling method for measuring Δ n (TD) Ave of a polyvinyl alcohol polymer film. [Explanation of main component symbols] No 0 - 48 -

Claims (1)

201244914 VII. Patent application scope·· Membrane, which is characterized by satisfying the following formula: Δ η(τ〇)Ανβ^ Δ n(MD)Ave + 1. A polyvinyl alcohol-based polymer thin (1) and (II): Δ n(MD)Ave-〇· 1 X 10'3 0.25X10·3.··· (I) A n(TD)Ave$ 2·5χ1〇_3··. (η) [In the above formula, A n( MD) Ave is charged, MVen table is the mechanical direction of the polyvinyl alcohol polymer film. The 率 Τ〇 Τ〇 β β β β 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表 代表The complex refractive index in the width direction of the polymer film is averaged along the thick acoustic direction of the film. 2. The polyethyl ketamine polymer film of claim 1 which satisfies the following formula (III): '1.3xUT3Un(MD)Avd2.〇xl(r3..(in). 3 · The polyvinyl alcohol-based polymer film of the 7# whistle of the patent application range 1 or 2 has a thickness in the range of 30 to 65 μm. 4 · A polyvinyl alcohol-based polymer film. A method for producing a polyvinyl alcohol-based polymer film, characterized in that: (a) an activation device having a plurality of drying rolls having a rotating shaft of a flat rod to ten turns, is used in the film forming apparatus (1) The film-forming stock solution containing the polyethylene-based polymer is spit out into a lotus seed-like film on the Cognac Island roll, and after being partially dried, it is dried and formed into a film by the subsequent drying involution; b) Ratio of the peripheral reading (ST) of the drying roll to the weekly reading (S) of the drying roll of the B-dioxide 1 when the volatilization ratio of the polyethyl alcohol-based polycrystalline film is 13% by mass (ST/S丨) Is 0.990~1.050; 处-49- 201244914 (C) The peripheral speed (SL) of the final drying roll relative to the volatile matter ratio of the polyvinyl alcohol polymer film The ratio (SL/ST) of the peripheral speed (ST) of the drying roll at a mass ratio of 13% by mass is 0.960 to 0.980; (d) the peripheral speed (SL) of the final drying roll is made relative to the peripheral speed of the first drying roll ( The ratio of (Sl/S!) of S!) is 0.970 to 1.010. 5. The manufacturing method of the fourth aspect of the patent application, wherein the volatile matter ratio of the polyvinyl alcohol-based polymer film when peeled from the first drying roll is 17〜30质量百分比 〇6. The manufacturing method of claim 4, wherein the surface temperature of each of the drying rolls is 65 ° C or higher. 7 _ as claimed in any of claims 4 to 6. The method for producing a film, wherein a volatilization ratio of the film forming stock solution containing the polyvinyl alcohol polymer is 60 to 75 mass%, and a roll surface temperature of the first drying roll is 80 to 120 ° C, and a peripheral speed of the first drying roll (S,) is 8 to 25 m/min. 8. A polarizing film produced by the polyvinyl alcohol-based polymer film according to any one of claims 1 to 3. -50-