WO2008111702A1 - Procédé de préparation d'un film de polarisation à base d'alcool polyvinylique, et film de polarisation à base d'alcool polyvinylique préparé par ce procédé - Google Patents

Procédé de préparation d'un film de polarisation à base d'alcool polyvinylique, et film de polarisation à base d'alcool polyvinylique préparé par ce procédé Download PDF

Info

Publication number
WO2008111702A1
WO2008111702A1 PCT/KR2007/002337 KR2007002337W WO2008111702A1 WO 2008111702 A1 WO2008111702 A1 WO 2008111702A1 KR 2007002337 W KR2007002337 W KR 2007002337W WO 2008111702 A1 WO2008111702 A1 WO 2008111702A1
Authority
WO
WIPO (PCT)
Prior art keywords
polyvinyl alcohol
film
polarizer film
preparing
solution
Prior art date
Application number
PCT/KR2007/002337
Other languages
English (en)
Inventor
In-Seok Oh
Yoo-Seong Hong
Bong-Tae Kim
Kyoung-Sik Choi
Hwa-Sub Shim
Jun-Wuk Park
Original Assignee
Lg Chem, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Chem, Ltd. filed Critical Lg Chem, Ltd.
Publication of WO2008111702A1 publication Critical patent/WO2008111702A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/32—Phosphorus-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Definitions

  • the present invention relates to a method for preparing a polyvinyl alcohol polarizer film and a polyvinyl alcohol polarizer film prepared by using the same, and more particularly to a method for preparing a polyvinyl alcohol polarizer film having a high polarization degree by preparing a polyvinyl alcohol film having a good uniformity toward a thickness direction by using a solution casting process and dyeing the polyvinyl alcohol film.
  • LCD liquid crystal display
  • FIG. 1 schematically shows a conventional polarizer sheet.
  • the polarizer sheet 1 includes a polarizer 6 arranged in its central region; and protective films 2,3 adhered to both sides of the polarizer 6 by means of pressure-sensitive adhesive layers 4,5.
  • the protective films 2,3 are arranged in both sides of the polarizer 6 to play a role in preventing damage of the polarizer 6.
  • the upper protective film 2 (a separator film) is peeled off and discarded before it is attached to the liquid crystal cell, and therefore the exposed pressure-sensitive adhesive layer 4 acts as a medium for adhesion between the polarizer 6 and the liquid crystal cell.
  • the lower protective film 3 is also peeled off and discarded after it is adhered to the liquid crystal cell.
  • the pressure-sensitive adhesive layer 5 is also peeled off together with its being adhered to the protective film 3.
  • the protective films 2,3 may be formed of ester resin such as PET.
  • the polarizer 6 arranged between the protective films 2,3 includes a polarizer film 10 and protective layers 7,8 adhered to both sides of the polarizer film 10 using adhesive layers 9 interposed between the protective layers 7,8 and the polarizer film 10.
  • the polarizer film 10 is generally made of a polyvinyl alcohol polymer dyed with iodine or dichromic dye
  • the protective layers 7,8 are made of triacetyl cellulose (TAC), etc.
  • the above-mentioned polyvinyl alcohol polarizer film is prepared by dissolving a polyvinyl alcohol polymer, a plasticizer and a surfactant in water to prepare an aqueous polyvinyl alcohol polymer solution, followed by solution-casting, drying and heat-treating the aqueous polyvinyl alcohol polymer solution to form a polyvinyl alcohol film and dyeing the polyvinyl alcohol film.
  • a polyvinyl alcohol polymer is prepared by using the solution casting method, it is difficult to form a polarizer film whose surface and inner part have the uniform structure since the polarizer film has a skin-core structure toward a thickness direction during the drying and heat treatment process.
  • the aqueous polyvinyl alcohol polymer solution discharged from the die by means of the solution casting allows a polyvinyl alcohol polymer to be transferred into a skin layer of film when the solvent, water, flows out of the film.
  • polymers rarely flow in the film during the above-mentioned drying and heat treatment steps, but the polyvinyl alcohol polymer is transferred into a surface layer of the film while a low molecular-weight water is dried since it has a strong interaction with molecules of the solvent, water. Because of this phenomenon, a density of the polyvinyl alcohol polymer is increased in the surface layer of the film, and therefore the skin layer of the film may have a higher crystallization degree than the core layer when a crystal is formed during the heat treatment process.
  • the ununiformity in the structure toward a thickness direction prevents iodine or a dichromic dye from penetrating into the deep inner part of the film during the dyeing process for preparing a polarizer film, and therefore the film is not dyed uniformly toward a thickness direction and its polarization degree is also deteriorated.
  • the core layer of the film has a poor strength, and therefore, if a thin polarizer film having a thickness of 50 ⁇ m or less is manufacture, its mechanical properties are not good, and a blocking phenomenon may appear in the polarizer film, resulting in difficulty in stretching workability.
  • the present invention is designed to solve the problems of the prior art, and therefore it is one object of the present invention to provide a method for preparing a polyvinyl alcohol polarizer film having a uniform polymer density toward a thickness direction. Also, it is another object of the present invention to provide a polyvinyl alcohol polarizer film prepared by using the preparation method.
  • the present invention provides a method for preparing a polyvinyl alcohol polarizer film, the method including:
  • the present invention provides a polyvinyl alcohol polarizer film prepared by using the preparation method.
  • the polyvinyl alcohol molecule has an excellent compatibility with the solvent, water. Accordingly, when the aqueous polyvinyl alcohol polymer solution is solution-cast, and then dried and heat-treated, a surface region of the polyvinyl alcohol film made from the polyvinyl alcohol polymer has a higher polymer density than its core region since a polyvinyl alcohol polymer is transferred into a surface of the film during the water evaporation. Accordingly, it is difficult to perform the subsequent processes due to difference in physical properties between the skin layer and the core layer of the film when the polyvinyl alcohol film is dyed and stretched to prepare a polarizer film.
  • the inventors found that a cross-linking reaction is induced in a drying step by adding a water-soluble cross-linking agent to an aqueous polyvinyl alcohol polymer solution prior to the step of solution-casting the aqueous polyvinyl alcohol polymer solution, wherein the cross-linking agent is able to cross-link the polyvinyl alcohol polymer to each other.
  • the transfer of the polyvinyl alcohol polymer was minimized during drying and heat treatment steps so that a molecule density can not be increased in a skin layer of the film. Therefore, the prevent invention was designed on the basis of the above findings.
  • the polyvinyl alcohol film prepared according to the preparation method of the present invention has a uniform structure toward a thickness direction, and the polarizer film prepared by using the preparation method also has improved mechanical properties and polarization degree.
  • FIG. 1 is a diagram showing a cross section of a conventional polarizer sheet provided with a polyvinyl alcohol polarizer film.
  • FIG. 2 is an optical microscopic photograph showing a dyeing property of the polyvinyl alcohol polarizer film according to Example 1 of the present invention.
  • FIG. 3 is an optical microscopic photograph showing a dyeing property of the polyvinyl alcohol polarizer film according to Comparative example 1 of the present invention.
  • the method for preparing a polyvinyl alcohol film according to the present invention includes:
  • This step is to dissolve a polyvinyl alcohol, a water-soluble cross-linking agent, a plasticizer and a surfactant in water to prepare an aqueous solution.
  • the polyvinyl alcohol polymer including vinyl alcohol as a repeating unit may be prepared by hydrolyzing a vinyl ester polymer obtained by polymerizing a vinyl ester monomer, followed by saponifying a vinyl ester unit into a vinyl alcohol unit.
  • the vinyl ester monomer includes, for example, vinyl formate, vinyl acetate, vinyl propionate, vinyl valerate, vinyl laurate, vinyl stearate, vinyl benzoate, vinyl pivaliate, vinyl vasatate, etc.
  • the vinyl acetate is desirable.
  • the polyvinyl alcohol polymer preferably has a saponification degree of 95 % or more, more preferably 99 % or more, and the most preferably 99.5 % or more. Heat resistance of the film may be deteriorated if the saponification degree is less than 95 %. Also, a mean polymerization degree of the polyvinyl alcohol polymer preferably ranges from 2,000 to 7,000, and more preferably from 2,600 to 5,000, in consideration of a heat resistance, a solution casting property, etc. of the prepared film.
  • the polyvinyl alcohol polymer preferably has a content of 10 to 60 % by weight, more preferably 15 to 45 % by weight, and the most preferably 20 to 40 % by weight on the basis of the total weight of the aqueous polyvinyl alcohol polymer solution, in consideration of formability and uniformity of the prepared film.
  • water-soluble cross-linking agents widely known in the art to which the present invention belongs, may be used herein.
  • Specific examples of the water-soluble cross-linking agent includes, but is not limited to, boric acid, borate and phosphoric acid, and they may be used alone or in combinations thereof.
  • a content of the water-soluble cross-linking agent preferably ranges from 0.001 to 2 parts by weight, and more preferably from 0.005 to 1 part by weight, based on 100 parts by weight of the polyvinyl alcohol polymer in the aqueous solution.
  • a cross-linking effect on the polyvinyl alcohol polymer may be lowered if the content of the water-soluble cross-linking agent is less than 0.001 parts by weight, while stretchability may be deteriorated during the stretching process if the content exceeds 2 parts by weight.
  • the plasticizer in the aqueous polyvinyl alcohol polymer solution which is added to improve a dyeing property of the polyvinyl alcohol film, may be generally used if it is used for preparing a polyvinyl alcohol polarizer film.
  • Polyhydric alcohol may be used as the plasticizer, and glycerine is particularly preferably used due to its compatibility with the polyvinyl alcohol polymer and its low optical scattering property.
  • a content of the plasticizer preferably ranges from 5 to 20 parts by weight, and more preferably from 7 to 15 parts by weight on the basis of 100 parts by weight of the polyvinyl alcohol polymer in the aqueous polyvinyl alcohol polymer solution, in consideration of a dyeing property of the polyvinyl alcohol film, a film strength, and adhesion between the films in a winding roll.
  • the surfactant is added to the aqueous solution so as to minimize a tensile force when a film is peeled off from a drum after the casting process.
  • a non-ionic surfactant, a cationic surfactant, an anionic surfactant and the like may be all used without limit if the surfactant may be used for preparing a polyvinyl alcohol polarizer film, and it is particularly preferred to used the non-ionic surfactant.
  • Specific examples of the surfactant, which may be used in the present invention include a polyacrylate-modified compound, a polysiloxane-modified compound, a polyoxyethylene ether compound, etc.
  • the surfactant is preferably added in a content of 0.001 to 2 parts by weight on the basis of 100 parts by weight of the polyvinyl alcohol polymer, in consideration of a peeling property and surface roughness, etc. of the film.
  • the solution casting and drying process of this step may be performed under the conditions widely known in the art to which the present invention belongs, but the present invention is not limited to the conditions.
  • the aqueous polyvinyl alcohol polymer solution prepared in the step (a) is cast onto the drum at a temperature of 80 to 100 " C through a
  • T-die having a temperature of 80 to 100 ° C, thereby to form a film.
  • a distance between the T-die and the drum is preferably maintained in a range of 10 mm or less, and preferably 5 mm or less.
  • the film is peeled off from the drum and passed through a plurality of drying rolls having a temperature of 70 to 90 ° C to form a polyvinyl alcohol film whose both surfaces are uniform. That is to say, the transfer of polymers into the surface layer of the film is inhibited in the film during the drying process since the polyvinyl alcohol polymer is cross-linked with each other by the water-soluble cross-linking agent added when preparing the aqueous casting solution. Therefore, a film having a high uniformity without a difference in density of the polymer toward a thickness direction of the film is prepared.
  • the polyvinyl alcohol film formed through the above-mentioned step is later subject to the heat treatment process so as to ensure mechanical properties.
  • the heat treatment is preferably performed at a temperature of 100 to 160 ° C, and more preferably 120 to 140 ° C, in consideration of the mechanical properties and stretchability of the film.
  • the heat treatment method there is no limitation on the heat treatment method, but conventional heat treatment methods may be used herein if they are used in the art to which the present invention belongs.
  • the heat treatment method it is possible to use a method for heat-treating a film while the film is in contact with a high-temperature roll, or a method for heat-treating a film with a high-temperature air, for example a hot air having a temperature of 100 to 160 ° C in an air floating manner.
  • the film is preferably heat-treated in the air floating manner.
  • the heat-treated polyvinyl alcohol film preferably further undergoes a step of controlling humidity.
  • the humidity control step is performed to remove a thermal history caused during the drying and heat treatment process, thereby to improve stretchability and a polarization property.
  • the humidity control method may be performed under humidity control conditions widely used in the art to which the present invention belongs.
  • the humidity control step may be performed under conditions of a temperature of 80 to 150 0 C and a humidity of 50 to 80 %.
  • the polyvinyl alcohol film prepared according to the above-mentioned method may be wound using conventional techniques known in the art to which the present invention belongs.
  • the anti-blocking agent which is added for the purpose of solving the problem of the adhesion between the films in a winding roll, should not be added in the case of the present invention.
  • the water-soluble cross-linking agent in the film has an effect on the inhibition of the adhesion between the films by adjusting reactivity of the film surface to a suitable level.
  • This step is to dye the polyvinyl alcohol film prepared according to the above-mentioned step.
  • dyeing processes may be performed with iodine or a dichromic dye
  • the polyvinyl alcohol film is preferably dyed in an aqueous iodine and boric acid solution, and potassium iodide is more preferably added to the aqueous solution.
  • it is possible to dye the polyvinyl alcohol film by immersing the polyvinyl alcohol film at 3 to 10 minutes in an aqueous solution containing 0.03 to 0.2 % iodine and 0.5 to 5 % potassium iodide.
  • the polyvinyl alcohol film prepared thus is completed into the polyvinyl alcohol polarizer film through the stretching process.
  • the stretching process may be performed before/after the dyeing step of the polyvinyl alcohol film, or performed at the same time as the dyeing step. That is to say, the polyvinyl alcohol film may be dyed and then stretched, and stretched and then dyed, or the polyvinyl alcohol film may also be dyed and stretched at the same time.
  • stretching process There is no particular limitation on the stretching process, but stretching processes, which is generally used in the art to which the present invention belongs, may be used herein.
  • the polyvinyl alcohol film is pre-heated at a temperature of 40 to 80 ° C for 30 seconds to 5 minutes, and then stretched 1.1 to 7 times in the length at a temperature of 40 to 80 ° C, and preferably 45 to 60 0 C.
  • the polyvinyl alcohol polarizer film prepared according to the preparation method of the present invention has a uniform structure toward a thickness direction.
  • the polyvinyl alcohol polarizer film has a very high polarization degree, which indicates that it has an improved polarization degree, compared to the conventional polyvinyl alcohol polarizer film.
  • the dissolution procedure was performed in a tank having a temperature of 130 ° C or above in order to inhibit formation of undissolved materials.
  • the prepared aqueous solution went through a defoaming process, and then was transferred to the T-die via a gear pump and a micro filter, and the aqueous solution was coated onto a drum having a temperature of 95 ° C through the 95 ° C T-die to form a film.
  • a distance between the T-die and the drum was maintained in a range of 3 mm.
  • the film was peeled off from the drum, and then passed through 11 drying rolls under a drying condition of 85 ° C to form a polyvinyl alcohol film having a moisture content of 8 %.
  • the film formed thus was passed through an air floating heating machine at a temperature of 120 ° C to form a crystal. Then, the film went through a humidity control process to prepare a polyvinyl alcohol film having a thickness of 75 [M.
  • the prepared polyvinyl alcohol film was swelled and dyed in an aqueous solution containing 0.05 % iodine and 0.3 % potassium iodide, and then stretched 5 times in a 50 ° C bath in which 3 % boric acid was dissolved to prepare a polyvinyl alcohol polarizer film. Then, the polyvinyl alcohol polarizer film was dried at a temperature of 80 ° C in the air floating manner to prepare a final polarizer film.
  • Example 2 was repeated in the same manner as in Example 1 to prepare a polyvinyl alcohol polarizer film, except that 1.0 part by weight of boric acid was added in the preparation process of the aqueous solution, based on 100 parts by weight of the polyvinyl alcohol, to prepare an aqueous solution.
  • the prepared polyvinyl alcohol polarizer film has a thickness of 50 /mi.
  • Example 1 The polarizer films prepared in Example 1 and Comparative example 1 were evaluated for dyeing and stretching uniformity using an optical microscope (Leica DM digital microscopy). The results are shown in FIG. 2 and FIG. 3, respectively.
  • the polarization degree was measured according to the following Equation 1 by measuring a light transmission curve of two overlapped polarizer films.
  • a used measuring machine was an n&kl280 Analyzer from N&K Technology.
  • H 1 represents a light transmissivity obtained by measuring horizontally overlapped polarizer films
  • H 2 represents a light transmissivity obtained by measuring vertically overlapped polarizer films.
  • the light used in the measurement has a wavelength of 400 to 700 nm, and a mean value of the polarization degree was calculated for the same wavelength after the polarization degree was measured.
  • the results according to the Examples 1 to 3 and Comparative example 1 are listed in the following Table 1.
  • FIG. 2 is an optical microscopic photograph showing a dyeing property of the polyvinyl alcohol polarizer film according to Example 1 of the present invention
  • FIG. 3 is an optical microscopic photograph showing a dyeing property of the polyvinyl alcohol polarizer film according to Comparative example 1 of the present invention. It was revealed that a central region of the film was uniformly dyed toward a thickness direction of the film as shown in FIG.
  • the polarizer film prepared according to the Example 1 of the present invention has an excellent dyeing property and stretchability, while the polarizer film of the Comparative example 1 has a poor dyeing property and stretchability.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Polarising Elements (AREA)

Abstract

L'invention concerne un procédé de préparation d'un film de polarisation à base d'alcool polyvinylique, et un film de polarisation à base d'alcool polyvinylique préparé par ledit procédé. Le procédé de préparation d'un film de polarisation d'alcool polyvinylique comporte les étapes consistant à : (a) dissoudre un polymère à base d'alcool polyvinylique, un agent de réticulation hydrosoluble, un plastifiant et un agent tensioactif dans de l'eau pour préparer une solution polymère aqueuse d'alcool polyvinylique ; (b) couler en solution, sécher et traiter thermiquement la solution polymère aqueuse d'alcool polyvinylique pour préparer un film d'alcool polyvinylique ; et (c) teinter le film d'alcool polyvinylique. Le procédé de la présente invention peut être utile pour réduire le transfert du polymère d'alcool polyvinylique dans une couche de peau du film, car le polymère d'alcool polyvinylique est réticulé par un agent de réticulation hydrosoluble dans les étapes de coulée en solution et de séchage. De manière correspondante, sont améliorés la propriété tinctoriale et l'aptitude à l'étirage dans les processus ultérieurs de teinture et d'étirage ainsi que les propriétés mécaniques et le degré de polarisation du film de polarisation.
PCT/KR2007/002337 2007-03-15 2007-05-11 Procédé de préparation d'un film de polarisation à base d'alcool polyvinylique, et film de polarisation à base d'alcool polyvinylique préparé par ce procédé WO2008111702A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0025367 2007-03-15
KR20070025367 2007-03-15

Publications (1)

Publication Number Publication Date
WO2008111702A1 true WO2008111702A1 (fr) 2008-09-18

Family

ID=39759630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/002337 WO2008111702A1 (fr) 2007-03-15 2007-05-11 Procédé de préparation d'un film de polarisation à base d'alcool polyvinylique, et film de polarisation à base d'alcool polyvinylique préparé par ce procédé

Country Status (2)

Country Link
TW (1) TW200844503A (fr)
WO (1) WO2008111702A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8761810B2 (en) * 2008-06-27 2014-06-24 Verizon Patent And Licensing Inc. Premises area map systems and methods
US20160046773A1 (en) * 2014-08-18 2016-02-18 Chung Yuan Christian University Transparent Gas Barrier Composite Film And Its Preparation Method
WO2019244968A1 (fr) * 2018-06-21 2019-12-26 株式会社クラレ Film d'alcool polyvinylique et son procédé de production
CN114230949A (zh) * 2021-12-28 2022-03-25 重庆光谱新材料科技有限公司 聚乙烯醇薄膜及其制备方法和偏光片

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010100917A1 (fr) * 2009-03-05 2010-09-10 日東電工株式会社 Film de polarisation mince extrêmement fonctionnel et son procédé de fabrication

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001315143A (ja) * 2000-05-12 2001-11-13 Kuraray Co Ltd ポリビニルアルコールフィルムの製造法
JP2002146139A (ja) * 2000-11-09 2002-05-22 Kuraray Co Ltd ポリビニルアルコールフィルム及びその製造法
JP2006199926A (ja) * 2004-12-21 2006-08-03 Nippon Synthetic Chem Ind Co Ltd:The ポリビニルアルコール系フィルム、およびその製造方法
KR20060091803A (ko) * 2005-02-15 2006-08-22 (주)텍스테크 폐 폴리비닐알코올을 이용한 폴리비닐알코올 필름의 제조방법 및 그 필름
JP2007058176A (ja) * 2005-07-28 2007-03-08 Nippon Synthetic Chem Ind Co Ltd:The 偏光膜用ポリビニルアルコール系フィルム及びそれを用いた偏光膜、偏光板

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001315143A (ja) * 2000-05-12 2001-11-13 Kuraray Co Ltd ポリビニルアルコールフィルムの製造法
JP2002146139A (ja) * 2000-11-09 2002-05-22 Kuraray Co Ltd ポリビニルアルコールフィルム及びその製造法
JP2006199926A (ja) * 2004-12-21 2006-08-03 Nippon Synthetic Chem Ind Co Ltd:The ポリビニルアルコール系フィルム、およびその製造方法
KR20060091803A (ko) * 2005-02-15 2006-08-22 (주)텍스테크 폐 폴리비닐알코올을 이용한 폴리비닐알코올 필름의 제조방법 및 그 필름
JP2007058176A (ja) * 2005-07-28 2007-03-08 Nippon Synthetic Chem Ind Co Ltd:The 偏光膜用ポリビニルアルコール系フィルム及びそれを用いた偏光膜、偏光板

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8761810B2 (en) * 2008-06-27 2014-06-24 Verizon Patent And Licensing Inc. Premises area map systems and methods
US20160046773A1 (en) * 2014-08-18 2016-02-18 Chung Yuan Christian University Transparent Gas Barrier Composite Film And Its Preparation Method
US9701799B2 (en) * 2014-08-18 2017-07-11 Chung Yuan Christian University Transparent gas barrier composite film and its preparation method
WO2019244968A1 (fr) * 2018-06-21 2019-12-26 株式会社クラレ Film d'alcool polyvinylique et son procédé de production
JPWO2019244968A1 (ja) * 2018-06-21 2021-06-24 株式会社クラレ ポリビニルアルコールフィルム及びその製造方法
JP7301829B2 (ja) 2018-06-21 2023-07-03 株式会社クラレ ポリビニルアルコールフィルム及びその製造方法
CN114230949A (zh) * 2021-12-28 2022-03-25 重庆光谱新材料科技有限公司 聚乙烯醇薄膜及其制备方法和偏光片
CN114230949B (zh) * 2021-12-28 2023-08-18 重庆光谱新材料科技有限公司 聚乙烯醇薄膜及其制备方法和偏光片

Also Published As

Publication number Publication date
TW200844503A (en) 2008-11-16

Similar Documents

Publication Publication Date Title
KR20100049604A (ko) 폴리비닐알코올 필름 및 그 제조법
TWI801543B (zh) 聚乙烯醇膜、及偏光膜之製造方法
JP6918933B2 (ja) ポリビニルアルコールフィルム、及び偏光フィルムの製造方法
CN104602912A (zh) 层叠体、偏振膜以及偏振膜的制造方法
JP6066727B2 (ja) 偏光フィルムの製造方法及び偏光板の製造方法
TW200813132A (en) Preparation method of polyvinyl alcohol film having good surface uniformity, polyvinyl alcohol film made by the same and polarizer film made from the polyvinyl alcohol film
WO2008111702A1 (fr) Procédé de préparation d'un film de polarisation à base d'alcool polyvinylique, et film de polarisation à base d'alcool polyvinylique préparé par ce procédé
CN101793980A (zh) 偏光元件外面保护膜、偏光板以及液晶显示元件
WO2016093259A1 (fr) Film polymère à base d'alcool polyvinylique, et procédé de fabrication de celui-ci
JP6918935B2 (ja) ポリビニルアルコールフィルム、及び偏光フィルムの製造方法
JP3496825B2 (ja) ポリビニルアルコール系重合体フィルムの製造法
JP5735302B2 (ja) 偏光フィルムの製造方法、偏光フィルム及び偏光フィルム用ｐｖａ系樹脂
JP6883990B2 (ja) ポリビニルアルコール系フィルム、ポリビニルアルコール系フィルムの製造方法、及び偏光膜
JP5814524B2 (ja) 偏光フィルム、偏光フィルム用ｐｖａ系樹脂フィルム及び偏光フィルムの製造方法
JP3478533B2 (ja) ポリビニルアルコール系重合体フィルムの製造法
JP4242021B2 (ja) 積層フィルムおよび偏光フィルム
JP5191442B2 (ja) 偏光板、及び、その製造方法、並びに、偏光板製造用接着剤
KR20070091994A (ko) 폴리비닐알콜 필름의 제조방법 및 이를 이용하여 제조된폴리비닐알콜 편광필름
JP2022033365A (ja) ポリビニルアルコールフィルム、及び偏光フィルムの製造方法
JP2011111526A (ja) ポリビニルアルコール系重合体フィルム
TW201700271A (zh) 聚乙烯醇薄膜
JP5901193B2 (ja) ポリビニルアルコール系位相差フィルム
TW201634494A (zh) 薄膜
WO2022113958A1 (fr) Procédé de production de film polarisant et film polarisant
WO2022071372A1 (fr) Procédé de fabrication de film polarisant

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07746486

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07746486

Country of ref document: EP

Kind code of ref document: A1