TW200914255A - Optical film having reduced size and number of gels and manufacturing method thereof - Google Patents

Abstract

An optical film for realizing excellent surface characteristics and a method for manufacturing the same are disclosed. Accordingly, an optical film having reduced size and number of gels by controlling the specific energy in the process of melt extrusion of the resin, and a manufacturing method of the film are provided. Thusly manufactured optical film can be widely utilized in manufacturing display products such as LCDs.

Description

200914255

File: TW478IF IX. Description of the Invention: [Technical Field of the Invention] The optical film f of the surface characteristics of the present color development is more specifically related to an optical film having a reduced gel size and number and a method for producing the same. [Prior Art] Due to the increased demand for thin screens such as LCDs and PDPs, the demand for enamel film has increased rapidly. Eight-piece pieces, such as calculations, are used to reverse the film of the mouth to require a light: or w phase difference. _ ground, ❹大 (10) The optical properties of uniformity. And the difference: ί Γ 需要 requires a film to compensate for the wide viewing angle of light passing through the liquid crystal. These retardation films have the smallest defects in the gel on the surface of the film except for the uniformity, and a few conventional retardation films impart a phase difference to the upper coating liquid by three crystals or by stretching, " α曰® Made from cellulose. Fold: 'Phase is _ from the stretched alicyclic hydrocarbon system phase difference. ^ $Cellulose is used to make the above-mentioned thin optical film. The typical method of casting is to complete the 'integrated eight objects, the capacity, the 'six use the sword', the _ sex band on σ / , / training, this generation The solution is applied to = color: = this is produced with uniform-thick air and the production speed is relative to high;; == to 200914255

Fiie: TW478IF, thus reducing economic efficiency. At this event, film producers have attempted to develop excellent optical properties in the film: smelting extrusion process: Good ‘Ippmi ZeQn has commercialized 貘 九 九 。. The tree is melted and extruded in an alicyclic dilute resin and commercialized with a phase difference film::: Development of a phase difference film, which is used at low cost - alicyclic dilution = final melt extrusion, f-pass, I-copolymerization Most of this, the use of alicyclic dilute copolymer J=J is limited. v The king's mouth and mouth display In order to solve the above problems, the inventors of the present invention have invested in the size and number of t gels. Therefore, a process for manufacturing = out = (four) is developed, while maintaining - high capacity is achieved by these findings. U violent [experimental content] = This 'Beneficial County completed the above problems, and the object of the present invention is to improve the surface properties of the optical film 'where the film is made of alicyclic olefins and is in the range of 64 〇μπΐχ48〇μηη The number of gels having an area of 邛 pm or larger is less than 1.5. In addition, another object of the present invention is to provide a method of producing an optical film by extruding a lipid oxime olefin copolymer at a specific hair of 0.14 kWh/kg or less in a melt extrusion process. Which specific energy is in the crowd 200914255

File: TW4781F Press - The operating energy of the screw in the middle of the screw divided by the output of the extruder per hour. According to one aspect of the present invention, the above and other objects are attained by the provision of an optical film having an excellent surface which is made of an alicyclic smoke copolymer and has a size per unit area of 640 μηΐ X 48 G μηι. The number of gels of 30 μηΊ or larger is less than 丨5. According to another aspect of the present invention, the above and other objects can be attained by the method of the above-mentioned D (4), which is carried out by extruding and melting a specific energy of two or less. Divided by the output of the extruder at the parent hour. The above and other objectives, features and detailed descriptions of the present invention are more clearly understood in conjunction with the accompanying drawings. ‘·· ' [Embodiment] i The present invention will now be described in further detail. A watch used to display an optical film of a product, during which the adhesion of a machine to a roller or a belt is hanged. In the case where the system is often produced, the gel is generated by deformation at high waste, temperature, and time. Hydrocarbons. When the thickness is 4, it is not like the alicyclic dilute resin when passing through the extruder. The alicyclic hydrocarbon is the same as the polyethylene, so it is easy: the -chain structure of the alicyclic dilute copolymer is applied to Optical film. Twirling. Therefore, it is known that when the resin is partially degraded in the machine and when the crosslinking is degraded by 200914255

File: The continuous reaction of free radicals generated by the action of TW478IF is carried out, so that the gel formed is in the shape of a cone/projection on the surface of the film. On the other hand, the gel is part, /, and the surface is similar, sometimes called fisheye. Thus ^ ' and its cross-section is incident, so the gel is embedded in the film; == the same _ is considered to be the main defect when present on the surface. The suspected gel can be removed by the fine filter. However, it must be cleaned and inconvenient at the time of formation. Another question: ^ When the gel that is condensed is not removed. Another _ = Gu after the shape! Pure example of the ... rate is different from the tree :::: = = by the fine filter located in the middle of the touch = open 2000-233425 and 2006 096001 =,, §, 纟 脂 fat The formation of the hydrocarbon sylvestre has a reduction in the compression ratio itself. In the study of the inventor of the present invention, it has been observed to refer to the respective figures, * in;; = reduction in size and number. When the compression is performed, the length of the screw section 1 in the figure is extended at ^ , and X is a relatively low pressure in the screw of the figure h = part::: = r creates a friction between the paragraphs to extend the paragraph. Because of the reduction: the heart is squeezed: the resin absorbs energy in the second pass. This energy can be distinguished as a denim. The heat energy generated by Fenshi and the physical energy produced by the rotation of the screw. The alicyclic olefin copolymer of Rita Yuming only takes up a short section in the extruder. 200914255

Fi!e: TW478IF ^ 3卩 The polymer was exposed to high temperatures and no formation of condensate was observed. It is known that the physical energy is more involved in the upper specific heat energy in the alicyclic dilute copolymer resin. It can be obtained by calculating the specific energy. The special month 22:: the energy used for the rotation divided by the output of the extruder per hour. (4) Defined as a squeeze in the screw motor 1 ^ resin

The monthly usage is kWh/kg. The specific energy is shown in the equation below. t Equation J Output kWh/kg means (kg/hr) = screw motor power / hourly extruder = = amount can vary due to process conditions such as extrusion temperature, screw speed or feed system. In addition, the composition of the trousers monomer. In particular, the inventors of the present invention have discovered that the specific energy itself is a factor that determines the specific energy of the gel formation. That is, it was found that the size and number (formation and growth) of the gel spoon can be substantially reduced by the specific energy of the resin. . kwh/kg or lower when the specific energy is lower than 〇. 14 kWh/iro· 〇, Λ 1 single: the number of gels with a size of 3Q (four) in the vertical area can be reduced::::^ Film surface and surface ZD - The degree of gelation is evaluated as an advantage of optics, while the specific energy exceeds 〇14 kWh/kg, the excessive shear/force generated by the free radicals during partial degradation of the molecular bonds. Therefore, the formation and growth of the gel can be promoted. y should

Grease ring 200914255

File: TW478!F Copolymer resin is accepted for special months, and the number of large gels at 64 〇 _ or larger or larger is 30 in the "::: area visible to the naked eye. In addition, Tian: Cheng or more. At this time, the penetration of the gel film is reduced, so that the reverse is successful, and the haze of the film is increased and thin. The difficulty of forming a resin as an optical film is used to manufacture the optical thin ring olefin copolymer resin of the present invention, which is the second to the second, which is a alicyclic ring using a lipid-lowering monomer such as ice-reducing structure. Dilute copolymerization. The norbornene organism, or the cyclodecene and the ethylene polymer resin, has a higher transparency than that used for the optical film. The alicyclic-copolymer resin is considered to be an excellent material for the sub-material because of its low hygroscopicity. Commercially available alicyclic olefinic copolymer resins include T〇pas manufactured by APEL and Τιcona Corp., manufactured by Mitsui ehemieals. The product form of the alicyclic olefin copolymer resin is not limited to this one. It is known to those skilled in the art. The amount of the heat resistance and the film may be 'privately produced, and the number of moles of the I olefinic olefin copolymer resin preferably contains from 8 mol% to 16 mol% of the alicyclic monomer. In the present invention, the components and functions of the present invention are further described by the appropriate embodiments of the present invention, but such embodiments are not intended to limit the invention in any way. The content not described herein can be understood by those skilled in the art without difficulty, and thus the description thereof will be omitted. 10 200914255

File:TW4781F Example 1

Eclipse: A film of optical alicyclic olefin copolymer film. In particular, the 1,3L full-feed method is used as a J-machine as a squeezer and a film system. The early screw squeezing 璧 n i clothing is shown in Figure 筮9. The resin melt is washed on the cooling drum 3 by, for example, the first drawing. (=A: The singer screw has a compression ratio of 4:1 仏摅 is 36. The screw rpm is set at 36 rpm. Other conditions are based on the process conditions listed in Table 1 μ', the amperage of the cattle turning motor, and It is recorded during the process for the screw 苜. In the outside, the working energy of the dry motor, according to this record: pre-time squeeze (four) after the output 'the system is measured by the die at the working electricity r: a resin from the wilderness The output of the extruder, the screw motor is divided by the output of the extruder at the mother hour to obtain a specific energy. Finally, the film with a thickness of 100 _ through the cooling roller is used - a non-contact illuminometer to observe 64 〇, # Φ ^ 1 n #mX48〇 area. Record the number of gels of the other 10 gels present in this area. Ί Size and & inch 30 _ or more Example 2 Measure: = ; optical alicyclic olefin copolymer Film. Use the = method as the resin supply system, and the design supply is more than the complete feed table of the model: V pm and other conditions are based on the calculation of the rubber split handle = C and in the film The coagulation & is the same as the method of Example 1. 200914255

FiIe: TW4781F Example ί = = = = Thin hydrocarbon copolymer film. The same low melting point of waxy resin, scorpion, and the king of the method of withdrawal. The friction between the machines is minimal.佶 佶 匕 vr A ^ ^ The wax used in this paper is L〇xiol Ep_8fn produced by Henkel AG & Co KGaA. Weaving from human θ Lo· 61 soil contains ι 〇. 4wt%.蟫椁 rpm and other conditions are based on the process conditions listed in Table 1. The calculation of the specific 1 dry 及 is carried out in the production of a thin film. Wind (4) Hometown analysis is the same as the method of Example 1. Compare the rotation speeds of the Examples 1 and 2 to cause specific energy to exceed the embodiment.

2 (four). ❹ (4) The method of _ 1 is based on complete feeding. Snail # rPm and other conditions are based on the system listed in Table 1 = cattle setting. The calculation of the specific energy was carried out in the same manner as in Example 1 in the production of the film. According to Comparative Examples 3 and 4, a screw having a low compression ratio is used, but the length of the compression section is longer than that of the embodiment, so that the application to the resin during compression is reduced, and (four) is specific. The energy exceeds the range of the embodiment towel #. As shown in the figure, the design screw has a compression ratio of 2: 1 (=C: D) and /D is 36. The extrusion temperature was set to 26 〇 2 as in the examples (: and below Example 250-〇c. Screw rpm and other conditions are based on the process conditions listed in Table 1 12 200914255

FiIe: TW478!F setting. Specific energy The method of Example 1 = calculation and gel analysis of the film formed in the same manner as in the table, according to the examples and comparative examples of the extrusion process column

[Table resin supply system - - „ extrusion temperature unit - QC Example 1 Complete 260 Example 2 Metering 260 Example 3 Complete 260 Comparative Example 1 Complete 260 Comparative Example 2 Complete 260 Comparative Example 3 Complete 260 Comparative Example 4 Full 250 screw compression ratio

Extruder screw RPM electric energy

Output Kg/hr 4

4

2

4

4

2

14 4.〇5 18.0

13 200914255

File: TW478IF energy t (four) pieces (four) specific film made by extruding material 1 〇 gel flat j spoon + gβ bit area with ruler size and in 640 (four) X thoroughly

The number of gels of Jam or larger is listed in Table 2. , ΙΑΙΙ

Very = significant reading of the size and number of sag produced by the invention A 戸 is often related to a specific energy. The purpose of the present invention is to rpm a specific energy of Example 1 at 14 kWh/kg or less. Another-aspect 'Comparative Examples 1 and 2 fall: Snails 14 200914255

File: TW4781F to control specific energy to exceed the range calculated in the examples. Thus, Example 1 has an average gel size of about 20% or less than that of Comparative Examples i and 2. Further, it was observed that the number of gels having a size of 3 Å or more in the Example 明显 was significantly reduced to 1, which was 3 and 3.5, respectively, compared with the Comparative Examples 丨 and 2. Comparative Example 2 and Example 2 had the same process conditions except that the resin supply lines were different. Real (4) 2 reduce the friction to reduce the specific energy by increasing the void space in the dragon machine. Therefore, Example 2, which lowers the specific energy, forms a gel having an average gel size which is reduced by 20%. Further, the number of gels having a size of 30 // m or more is 〇 8, which is similar to that of Example 1. Comparative Examples 3 and 4 used a modified screw which reduced the screw compression ratio to reduce the friction applied to the resin during the compression process. However, Comparative Examples 3 and 4 show a high specific energy due to the extension of the friction generating section due to the elongation of the compression section. In the comparative example...

In the case of a gel having a size of 30 /zm or larger and a comparative example! And 2 == low to some? range. However, due to the low compression ratio, the recorded eve is 2 or more. Moreover, the average gel size did not change. In the third embodiment, the entanglement is added to the squeezing _ to reduce the friction, and the specific energy and the ground are lowered even if other conditions are the same: · ', , and the ring. Therefore, the decrease of the specific energy by the embodiment 3 and the control example 3 is as low as about m' and the number of gels having a size of "1 or more is reduced from 2 to 0.8. The above results show that regardless of the film and process conditions such as screw set 200914255

File: TW4781F Two-bar rotation speed, and its similar damage structure change, the tendency of 骖 formation is closely related to specific energy. It can be seen that the alicyclic hydrocarbon (4) produced by lowering the specific energy is used as a process parameter to inhibit the formation of condensate and thus, the alicyclic hydrocarbon copolymer phase can be easily used as an excellent surface characteristic. Optical film. That is, the optical thin resin extruded according to the present invention (4) has a large amount of ruthenium phase and inhibits the formation and growth of the aggregate, and has 2 haze and high light transmittance. Therefore, the optical film of the present invention is used for the manufacture of display products such as LCDs. While the preferred embodiment of the present invention has been described by way of illustration, it will be appreciated by those skilled in the art that the various modifications and additions are possible without departing from the scope and spirit of the invention, as defined in the scope of the patent application. 200914255

File:TW478IF

BRIEF DESCRIPTION OF THE DRAWINGS Fig. a is a diagram showing a screw scale according to the present invention; Fig. 1b is a diagram showing the first embodiment of Fig. 1 and Fig. Designed with 2. U/C: D) l scaled screw diagram;

The second ® is a simple schematic diagram illustrating the apparatus of the fourth embodiment of the present invention. 4 out I main component symbol description 17

Claims (1)

200914255 File: TW4781F X. Patent application scope: The ruthenium film is made of alicyclic olefin copolymer, wherein the ruthenium film is 640 /, m ν β. . , .$ ^ "mx 480 has a gel number of (10) / / m or more in units of m per unit of less than 15. The film of claim 1 wherein the film is stored in 480 unit area The number of gels having a size of 30 or more is less than 12. & ('The film described in the first item of the ugly patent range> wherein the fat ring is white ^ ^ 曰 ^ wrong by copolymerization at least - fat The invention relates to the film of the third aspect of the invention, wherein the alicyclic sputum precursor is a group selected from the group consisting of norbornene and the like. Biological, and % 戍蝉 5. The bean olefin monomer as described in claim 3 is a resin mole number / 帛 ..., ^ 曰衩夭 曰衩夭 芡 "Mor% to 16% by volume. I. A method of manufacturing a film as claimed in the patent 笳Ifl Chu 1 , which comprises an optical thin or lower specific energy squeezing alicyclic ring 2 as described in item 1 of the wei W;;: 0·2: The amount of kg is the output of the specific energy of the screw in the extruder 1 . The electric energy is divided by the mother hour. 7. The olefin as described in claim 6 The polymer is 〇.u kWh/k / , /, the alicyclic ring 8 · as claimed in the patent range, the ene candle copolymer is via copolymerization at least = method 'where the month is the ring olefin monomer and ethylene 200914255 hiIe; JW47 «IF obtained resin. 9. If the patent application scope 帛 δ 妇 烟 early body of the fat hydrocarbon monomer sigh method, the alicyclic organism, and cyclopentane erectane borneol, norbornene烯 衍.. If applying for a patent =::r group. The ringing monomer is the amount of resin material (4)