KR20140075498A - Adhesive composition and polarising plate using the same - Google Patents
Adhesive composition and polarising plate using the same Download PDFInfo
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- KR20140075498A KR20140075498A KR1020120143913A KR20120143913A KR20140075498A KR 20140075498 A KR20140075498 A KR 20140075498A KR 1020120143913 A KR1020120143913 A KR 1020120143913A KR 20120143913 A KR20120143913 A KR 20120143913A KR 20140075498 A KR20140075498 A KR 20140075498A
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- pressure
- adhesive composition
- sensitive adhesive
- weight
- polarizing plate
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polarising Elements (AREA)
Abstract
Description
The present invention relates to a pressure-sensitive adhesive composition capable of retardation compensation and a polarizing plate using the same.
The liquid crystal display comprises a liquid crystal cell in which a transparent electrode, a liquid crystal layer, a color filter or the like is sandwiched between glass plates, and a polarizing plate bonded to both surfaces of the liquid crystal cell by an adhesive layer.
The polarizing plate has a polarizer and a polarizer protective film laminated on both sides thereof. A cellulose-based protective film or a cycloolefin-based protective film is used as the polarizer protective film to be bonded to the pressure-sensitive adhesive, and a cellulose-based protective film is generally used on the opposite side.
An optical functional film such as a surface treatment film or a retardation film may be laminated on the polarizer protective film.
In particular, in order to realize desired retardation compensation, it is common to laminate various retardation films in combination (Japanese Patent Registration No. 3926824), so that the thickness of the polarizer tends to increase. In recent years, there has been a growing demand for low cost and thinness of a polarizing plate. In order to meet such a demand, it is necessary to develop a polarizing plate capable of exhibiting a retardation compensation effect together with a reduction in thickness.
The present invention provides a pressure-sensitive adhesive composition capable of simultaneously performing pressure-sensitive and pressure-sensitive C-phase compensation.
The present invention also provides a polarizing plate using the pressure-sensitive adhesive composition, wherein the thickness of the polarizing plate is considerably reduced compared with the conventional pressure-sensitive adhesive composition.
In order to achieve the above object, the present invention provides a pressure-sensitive adhesive composition wherein the positive C-forming compound is contained in an amount of 1 to 30 parts by weight based on 100 parts by weight of the total solid content.
Preferably, the positive C forming compound may be contained in an amount of 5 to 20 parts by weight.
The pressure-sensitive adhesive composition may contain an acrylic copolymer and a positive C-forming compound.
Further, the present invention provides a polarizing plate coated with the pressure-sensitive adhesive composition on a protective film of a polarizer having at least one surface to which a polarizer protective film is bonded.
The polarizer protective film may be a retardation film.
The pressure-sensitive adhesive composition of the present invention is advantageous in that the positive C retardation compensation can be performed at the same time as the pressure-sensitive adhesive property, and the polarizing plate can be made thinner since the positive C retardation film used for realizing the retardation of the conventional polarizing plate is not used.
The present invention relates to a pressure-sensitive adhesive composition capable of retardation compensation and a polarizing plate using the same.
Hereinafter, the present invention will be described in detail.
In the pressure-sensitive adhesive composition of the present invention, the positive C forming compound is contained in an amount of 1 to 30 parts by weight based on 100 parts by weight of the total solid content. Preferably, the positive C forming compound may be contained in an amount of 5 to 20 parts by weight.
When the content is less than 1 part by weight, the amount is insignificant, and it may be difficult to achieve a desired retardation. When the content is more than 30 parts by weight, miscibility with other components may be deteriorated, and haze may be generated or adhesive strength may be lowered.
The positive C forming compound is generally used in the art, and a liquid crystal compound or a polymer compound may be used.
The liquid crystal compound may be a low molecular weight liquid crystal compound or a polymer liquid crystal compound, and a low molecular weight liquid crystal compound is preferable in view of compatibility with the pressure sensitive adhesive composition. Specific examples of the low-molecular liquid crystal compound include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenyl cyclohexanes, cyano- Alkoxy-substituted phenylpyrimidines, phenyl dioxanes, and alkenylcyclohexylbenzonitriles.
Wherein the polymer compound comprises a side chain having a halogen-substituted main chain and a halogen-substituted aryl group having 6 to 12 carbon atoms, a molar ratio of carbon to a halogen element is 6: 4 to 8: 2 and a glass transition temperature is 150 to 250 Lt; 0 > C. The glass transition temperature is preferably 180 to 230 占 폚, the halogen is fluorine, and the aryl group is preferably a phenyl group or a naphthalene group.
Such a polymer compound preferably has a weight average molecular weight of 100,000 to 1,000,000. And may be the weight average molecular weight.
The polymer compound forming the positive C according to the present invention introduces the electron accepting individual halogen element into the main chain and introduces the electron main individual aryl group into the side chain, Orientation is possible.
In particular, the pressure-sensitive adhesive composition of the present invention can improve the viewing angle characteristics without using a separate viewing angle compensation film when applied to IPS mode and FFS mode liquid crystal display devices.
Generally, the IPS mode and FFS mode liquid crystal display devices have a low contrast ratio due to the occurrence of light leakage at an oblique angle in a black state unless a viewing angle compensating film is used. Therefore, phase difference compensation is required to improve the contrast ratio.
Since the pressure sensitive adhesive composition of the present invention can realize the positive C property simultaneously with the pressure-sensitive adhesive property, the contrast characteristics at the front and the inclined angle are improved by the effect of the retardation compensation when applied to the IPS mode and FFS mode liquid crystal display devices, Light leakage can be minimized.
The pressure-sensitive adhesive composition according to the present invention contains a main resin component for exhibiting adhesive strength, and the resin component is not particularly limited. Acrylic type, silicone type, polyester type, polyurethane type, polyamide type, polyether type, fluorine type and rubber type. Acryl type is preferable considering optical transparency, wettability, cohesiveness and adhesiveness.
The present invention will be described specifically with reference to an acrylic pressure sensitive adhesive composition, but the present invention is not limited thereto.
(Meth) acrylate monomer having an alkyl group having 1-12 carbon atoms and an alkyl group having 1-12 carbon atoms, examples of the acrylic pressure sensitive adhesive composition include n-butyl (meth) acrylate, 2- Ethyl (meth) acrylate, ethyl (meth) acrylate, methyl (meth) acrylate, n-propyl (meth) acrylate, isobutyl (meth) acrylate, isobutyl (Meth) acrylate, decyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl Acrylate. Of these, n-butyl acrylate, 2-ethylhexyl acrylate or a mixture thereof is preferable. These may be used alone or in combination of two or more.
In addition, a polymerizable monomer having a crosslinkable functional group may be further contained.
The polymerizable monomer having a crosslinkable functional group includes, for example, a monomer having a hydroxy group, a monomer having a carboxyl group, a monomer having an amide group, a monomer having a tertiary amine group, etc. These monomers may be used alone or in combination.
Examples of the monomer having a hydroxy group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl Hydroxypropyleneglycol (meth) acrylate, hydroxyalkylene glycol having 2 to 4 carbon atoms in the alkylene group (e.g., methoxyethyl (meth) acrylate, Hydroxybutyl vinyl ether, 8-hydroxyoctyl vinyl ether, 9-hydroxynonyl (meth) acrylate, 4-hydroxybutyl vinyl ether, Vinyl ether, and 10-hydroxydecyl vinyl ether, among which 4-hydroxybutyl vinyl ether is preferable.
Examples of the monomer having a carboxyl group include monovalent acids such as (meth) acrylic acid and crotonic acid; Dicarboxylic acids such as maleic acid, itaconic acid, and fumaric acid, and monoalkyl esters thereof; 3- (meth) acryloylpropionic acid; A succinic anhydride ring-opening addition adduct of 2-hydroxyalkyl (meth) acrylate in which the alkyl group has 2 to 4 carbon atoms, anhydrous succinic ring opening adduct of a hydroxyalkylene glycol (meth) acrylate having 2 to 4 carbon atoms in the alkylene group , Compounds obtained by ring-opening addition of succinic anhydride to caprolactone adducts of 2-hydroxyalkyl (meth) acrylates whose alkyl groups have 2-3 carbon atoms, and among these, (meth) acrylic acid is preferable.
Examples of the monomer having an amide group include (meth) acrylamide, N-isopropyl acrylamide, N-tertiary butyl acrylamide, 3-hydroxypropyl (meth) acrylamide, 4-hydroxybutyl (Meth) acrylamide, 8-hydroxyoctyl (meth) acrylamide, and 2-hydroxyethylhexyl (meth) acrylamide. Of these, (meth) acrylamide is preferable.
Examples of the monomer having a tertiary amine group include N, N- (dimethylamino) ethyl (meth) acrylate, N, N- (diethylamino) ethyl (meth) Methacrylate, and the like.
The acrylic copolymer of the present invention may further contain other polymerizable monomers other than the above monomers in a range not lowering the adhesive force, for example, 10 parts by weight or less based on the total amount.
The method for producing the copolymer is not particularly limited and can be produced by methods such as bulk polymerization, solution polymerization, emulsion polymerization or suspension polymerization, which are commonly used in the art, and solution polymerization is preferable. In addition, a solvent, a polymerization initiator, a chain transfer agent for molecular weight control and the like which are usually used in polymerization can be used.
The acrylic pressure sensitive adhesive composition may further contain a crosslinking agent. The crosslinking agent can improve the adhesion and durability, and can maintain the reliability at a high temperature and the shape of the pressure-sensitive adhesive.
The cross-linking agent may be an isocyanate-based, epoxy-based, melamine-based, peroxide-based, metal chelating-based, oxazoline-based, or the like. Preferred is a double isocyanate-based or epoxy-based.
In addition to the above components, the pressure-sensitive adhesive composition may further contain various additives such as a silane coupling agent, a tackifier resin, an antioxidant, a leveling agent, a surface lubricant, a dye, an antioxidant, and the like in order to control the adhesion, cohesion, viscosity, Pigments, antifoaming agents, fillers, antistatic agents, and the like.
The present invention is characterized by a polarizing plate on which the above pressure-sensitive adhesive composition is applied on a protective film of a polarizer to which a polarizer protective film is bonded on at least one side.
The polarizer protective film is excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, etc., and is not specifically proposed. Specifically, an acrylate type, a cellulose type, a cycloolefin type or a polyester type can be used.
In addition, the polarizer protective film may be a retardation film capable of simultaneously performing a function of optical compensation.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.
Manufacturing example One : Polarizer Produce
A PVA film having a degree of saponification of 2,400 and a degree of saponification of 99.9 mol% or more was uniaxially stretched by a dry method about 5 times in a dry state and immersed in distilled water at 60 DEG C for 1 minute while maintaining the tension, And immersed for 60 seconds in an aqueous solution at 28 占 폚 in which the weight ratio of distilled water was 0.05 / 5/100. Thereafter, the substrate was immersed in an aqueous 72 ° C aqueous solution having a weight ratio of potassium iodide / boric acid / distilled water of 8.5 / 8.5 / 100 for 300 seconds, washed with distilled water at 26 ° C for 20 seconds and dried at 65 ° C to obtain a polyvinyl alcohol film Iodine was adsorbed on the polarizer.
Manufacturing example 2: Preparation of adhesive composition
10 parts by weight of glyoxal as a crosslinking agent and 5 parts by weight of Rockwood) were mixed with 100 parts by weight of acetoacetylene-modified polyvinyl alcohol binder resin (Z200, manufactured by Nippon Synthetic Chemical Industry Co., Ltd., solids content basis) to prepare an adhesive composition.
Manufacturing example 3: Positive C forming compound (fluorinated polymer resin, J. Org . Chem . 2004. 69. 7083-7091)
(1) Tri-fluoroethenylzinc < RTI ID = 0.0 >
In a nitrogen atmosphere, a 250 ml Erlenmeyer flask was cooled to -20 캜 using dry ice and propanol, and zinc chloride (3.42 g, 25.0 mol) and THF (15 ml) were added to the flask. Then, a solution of 1,1,1,2-tetrafluoroethane (2.5 ml, 30.0 mmol) cooled to 15 ° C was added to the flask and stirred for 30 minutes. Then, lithium diisopropylamide solution (7 ml, 50 mmol) and normal-butyl lithium (20 ml, 2.5M, 50 mmol) were slowly injected into the flask at 0 ° C for 30 minutes by syringe. Thereafter, the temperature was gradually raised to room temperature to obtain a yellow liquid, and dried to obtain about 50% of the obtained liquid without further washing (yield: 73%).
(2) 1,2,2-Trifluorostyrene
Iodobenzene (2.85 g, 14.0 ml) and palladium catalyst (Pd (PPh 3 ) 4 , 0.28 g, 1.5 mol%) were placed in a half dried triflouroethenyl zinc compound (40 ml, 17.5 mmol) And the mixture was stirred while heating for about 3 hours. The stirring solution was purified with pentene, and then the solvent was removed to obtain a 1,2,2-trifluorostyrene compound as a colorless solution (yield 69%).
(3) Polymerization
In a nitrogen atmosphere, a 250 ml Erlenmeyer flask was charged with 10 mg of AIBN (azoisobutyl nitrile) as an initiator. 100 ml of purified toluene and 10 ml of 1,2,2-trifluorostyrene as a monomer were further added, and the mixture was stirred for about 3 hours while keeping the temperature at 70 캜 with a water bath. (Yield: 62%, weight average molecular weight: 430000, degree of polymerization (PDI): 5.5) was obtained by filtration with a sufficient amount of methanol and then drying.
Example One
1) Preparation of pressure-sensitive adhesive composition
A four neck jacket reactor (1 L) was equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen gas introducing tube. The reactor was purged with nitrogen gas, and then 164 parts by weight of ethyl acetate, 126 parts by weight of butyl acrylate, 0.5 part by weight of acrylic acid and 1.3 parts by weight of 2-hydroxyethyl acrylate were charged, and the external temperature of the reactor was raised to 50 占 폚. Then, a solution in which 0.14 parts by weight of 2,2'-azobisisobutyronitrile (AIBN) was completely dissolved in 10 parts by weight of ethyl acetate was added dropwise to the reactor. The reaction was continued for an additional 5 hours while keeping the jacket temperature at 50 캜, and then 90 parts by weight of ethyl acetate was slowly added dropwise for 1 hour using a dropping funnel. After further stirring at the same temperature for 6 hours, 304 parts by weight of ethyl acetate was added, and the mixture was further stirred for 2 hours to obtain an acrylic copolymer. The prepared acrylic copolymer had a solid content of 20% and a weight average molecular weight (in terms of polystyrene) of about 1,500,000 by the GPC method.
100 parts by weight of the acrylic copolymer resin (based on the solid content) and 0.8 parts by weight of trimethylolpropane-modified tolylene diisocyanate (Coronate L, Nippon Polyurethane Industry) were added to prepare 100 parts by weight of the total solid content. 5 parts by weight of the positive C forming compound (fluoropolymer resin) of Example 3 was added to prepare a pressure-sensitive adhesive composition.
The pressure-sensitive adhesive composition prepared above was applied on a releasing film coated with silicone release agent to a thickness of 25 탆 and dried at 100 캜 for 1 minute to form an adhesive layer. Thereafter, a release film was laminated on the pressure-sensitive adhesive layer to produce a pressure-sensitive adhesive sheet.
2) Polarizing plate manufacturing
The adhesive composition of Production Example 2 was coated on both sides of the polyvinyl alcohol (PVA) polarizer of Production Example 1 so as to have a dry film thickness of 0.1 mu m, and then a saponified triacetylcellulose film (30 cm x 20 cm ), And an olefin type retardation film (negative B plate) was bonded to the bottom. The conjugate was dried at a temperature of about 65 캜 for 5 minutes to prepare a polarizing plate.
On the retardation film of the polarizing plate, the releasing film was peeled off from the pressure-sensitive adhesive sheet produced in 1), and the pressure-sensitive adhesive layer was laminated by sticking to produce a polarizer with a pressure-sensitive adhesive. The prepared polarizer with a pressure-sensitive adhesive was stored at 23 DEG C and 60% RH for a curing period.
Example 2
A pressure-sensitive adhesive composition and a polarizing plate with a pressure-sensitive adhesive were prepared using Paliocolor LC242 (BASF), which is a liquid crystal compound containing an aromatic compound, in place of the positive C forming compound (fluoropolymer resin) in Production Example 3 .
Example 3
A pressure-sensitive adhesive composition and a polarizing plate with a pressure-sensitive adhesive were prepared in the same manner as in Example 1 except that 10 parts by weight of the positive C forming compound (fluorine-based polymer resin) of Production Example 3 was used.
Example 4
A pressure-sensitive adhesive composition and a polarizing plate with a pressure-sensitive adhesive were prepared in the same manner as in Example 1 except that 25 parts by weight of the positive C forming compound (fluorine-based polymer resin) of Production Example 3 was used.
Comparative Example One
A pressure-sensitive adhesive composition and a polarizing plate with a pressure-sensitive adhesive were prepared in the same manner as in Example 1 except that 0.5 part by weight of the positive C forming compound (fluorine-based polymer resin) of Production Example 3 was used.
Comparative Example 2
A pressure-sensitive adhesive composition and a polarizing plate with a pressure-sensitive adhesive were prepared in the same manner as in Example 1 except that 35 parts by weight of the positive C forming compound (fluorine-based polymer resin) of Production Example 3 was used.
Test Example
The properties of the pressure-sensitive adhesive composition and the polarizer with a pressure-sensitive adhesive prepared in the above Examples and Comparative Examples were measured by the following methods, and the results are shown in Table 2 below.
One. Phase difference Measure
The upper surface of the pressure-sensitive adhesive layer was placed in the direction of the analyzer, and Rth was measured for an average refractive index of 1.52 using an accelerometer (Axoscan, manufactured by Axometrics). Rth of the olefin-based retardation film (negative B plate) was subtracted from the measured Rth value to calculate Rth of the pressure-sensitive adhesive layer. At this time, Rth is defined by the following equation (1).
(Where nx and ny are plane refractive indices of the film, and x is a vibration direction in which the plane refractive index becomes the maximum, the refractive index due to light oscillating in this direction is nx, nx and ny are perpendicular to each other, ≥ny, nz represents the refractive index in the direction perpendicular to the plane defined by nx and ny (film thickness direction), and d is the thickness of the film)
2. Optical properties
The prepared polarizer with a pressure-sensitive adhesive was cut into a size of 40 × 40 mm and the transmittance (%) and HAZE (%) were measured using an optical property meter (Haze METER (HM-150)) and evaluated by the following method.
[Assessment Methods]
- Transmittance
90% or more: ○
70% to less than 90%: △
Less than 70%: x
-HAZE
1.5% or less: ○
Over 1.5% Less than 3%: △
3% or more: ×
3. Adhesion
The prepared polarizing plate with a pressure-sensitive adhesive was cut into a size of 25 mm x 100 mm, the release film was peeled off, laminated on a glass substrate (# 1737, Corning) at a pressure of 0.25 MPa, The specimens were prepared by clave treatment. The prepared specimens were allowed to stand under conditions of 23 ° C and 50% RH for 24 hours, and then their adhesion was measured using a universal tensile tester (UTM, Instron) at a peeling speed of 10 m / min and a peeling angle of 180 °. At this time, measurement was carried out at 23 ° C and 50% RH.
[Assessment Methods]
5N or more: ○
1N or more and less than 5N:?
Below 1N: x
(Mm)
As shown in Table 1, the polarizing plates of Examples 1 to 4 according to the present invention are superior to those of Comparative Examples 1 and 2 in that they can realize a positive C without using a retardation film and have excellent optical characteristics and adhesive strength I could confirm.
Claims (5)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107429024A (en) * | 2015-01-23 | 2017-12-01 | 阿克隆聚合物***有限公司 | Polymeric blends based on fluoropolymer, polymer film, and polaroid protective film |
-
2012
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107429024A (en) * | 2015-01-23 | 2017-12-01 | 阿克隆聚合物***有限公司 | Polymeric blends based on fluoropolymer, polymer film, and polaroid protective film |
KR20170134334A (en) * | 2015-01-23 | 2017-12-06 | 아크론 폴리머 시스템즈, 인코포레이티드 | Fluoropolymer polymer blends, polymer films and polarizer protective films |
JP2018510921A (en) * | 2015-01-23 | 2018-04-19 | アクロン ポリマー システムズ,インコーポレイテッド | Fluoropolymer-based polymer blend, polymer film and polarizer protective film |
EP3247745A4 (en) * | 2015-01-23 | 2018-07-11 | Akron Polymer Systems, Inc. | Fluoropolymer-based polymer blends, polymer films, and polarizer protective films |
CN107429024B (en) * | 2015-01-23 | 2020-07-14 | 阿克隆聚合物***有限公司 | Polymer mixture based on fluoropolymer, polymer film, and polarizer protective film |
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