WO2023286954A1 - 폴딩 성능이 우수한 광학 필름 및 이를 포함하는 표시장치 - Google Patents
폴딩 성능이 우수한 광학 필름 및 이를 포함하는 표시장치 Download PDFInfo
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- WO2023286954A1 WO2023286954A1 PCT/KR2021/019823 KR2021019823W WO2023286954A1 WO 2023286954 A1 WO2023286954 A1 WO 2023286954A1 KR 2021019823 W KR2021019823 W KR 2021019823W WO 2023286954 A1 WO2023286954 A1 WO 2023286954A1
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- WO
- WIPO (PCT)
- Prior art keywords
- optical film
- based compound
- repeating unit
- diamine
- bis
- Prior art date
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- 239000012788 optical film Substances 0.000 title claims abstract description 121
- 239000002952 polymeric resin Substances 0.000 claims abstract description 62
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 62
- 150000001875 compounds Chemical class 0.000 claims description 192
- 150000004985 diamines Chemical class 0.000 claims description 90
- 125000004989 dicarbonyl group Chemical group 0.000 claims description 51
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 claims description 42
- 238000006116 polymerization reaction Methods 0.000 claims description 41
- NVKGJHAQGWCWDI-UHFFFAOYSA-N 4-[4-amino-2-(trifluoromethyl)phenyl]-3-(trifluoromethyl)aniline Chemical compound FC(F)(F)C1=CC(N)=CC=C1C1=CC=C(N)C=C1C(F)(F)F NVKGJHAQGWCWDI-UHFFFAOYSA-N 0.000 claims description 13
- 150000002367 halogens Chemical class 0.000 claims description 11
- -1 3DDS) Chemical compound 0.000 claims description 10
- 229910052736 halogen Inorganic materials 0.000 claims description 10
- LJGHYPLBDBRCRZ-UHFFFAOYSA-N 3-(3-aminophenyl)sulfonylaniline Chemical compound NC1=CC=CC(S(=O)(=O)C=2C=C(N)C=CC=2)=C1 LJGHYPLBDBRCRZ-UHFFFAOYSA-N 0.000 claims description 9
- UVUCUHVQYAPMEU-UHFFFAOYSA-N 3-[2-(3-aminophenyl)-1,1,1,3,3,3-hexafluoropropan-2-yl]aniline Chemical compound NC1=CC=CC(C(C=2C=C(N)C=CC=2)(C(F)(F)F)C(F)(F)F)=C1 UVUCUHVQYAPMEU-UHFFFAOYSA-N 0.000 claims description 8
- BEKFRNOZJSYWKZ-UHFFFAOYSA-N 4-[2-(4-aminophenyl)-1,1,1,3,3,3-hexafluoropropan-2-yl]aniline Chemical compound C1=CC(N)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(N)C=C1 BEKFRNOZJSYWKZ-UHFFFAOYSA-N 0.000 claims description 8
- MQJKPEGWNLWLTK-UHFFFAOYSA-N Dapsone Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 MQJKPEGWNLWLTK-UHFFFAOYSA-N 0.000 claims description 8
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 6
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 6
- YBRVSVVVWCFQMG-UHFFFAOYSA-N 4,4'-diaminodiphenylmethane Chemical compound C1=CC(N)=CC=C1CC1=CC=C(N)C=C1 YBRVSVVVWCFQMG-UHFFFAOYSA-N 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 4
- CPIHROHSKIVNRY-UHFFFAOYSA-N NC1=CC=C(C(=O)C2=CC=C(C=C2)N)C=C1.NC1=CC=C(C(=O)C2=CC=C(C=C2)N)C=C1 Chemical compound NC1=CC=C(C(=O)C2=CC=C(C=C2)N)C=C1.NC1=CC=C(C(=O)C2=CC=C(C=C2)N)C=C1 CPIHROHSKIVNRY-UHFFFAOYSA-N 0.000 claims description 2
- IVBNXVYDQWGRHV-UHFFFAOYSA-N bis(3-aminophenyl)methanone Chemical compound NC1=CC=CC(C(=O)C=2C=C(N)C=CC=2)=C1.NC1=CC=CC(C(=O)C=2C=C(N)C=CC=2)=C1 IVBNXVYDQWGRHV-UHFFFAOYSA-N 0.000 claims description 2
- 125000003368 amide group Chemical group 0.000 claims 6
- 125000005462 imide group Chemical group 0.000 claims 5
- CAGIBWZLRAAFJF-UHFFFAOYSA-N 4-(4-aminophenyl)aniline;tetrahydrochloride Chemical compound Cl.Cl.Cl.Cl.C1=CC(N)=CC=C1C1=CC=C(N)C=C1 CAGIBWZLRAAFJF-UHFFFAOYSA-N 0.000 claims 1
- 101000916547 Homo sapiens Zinc finger and BTB domain-containing protein 38 Proteins 0.000 claims 1
- 102100028125 Zinc finger and BTB domain-containing protein 38 Human genes 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 35
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- 150000002430 hydrocarbons Chemical group 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 13
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 8
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- 125000003118 aryl group Chemical group 0.000 description 7
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- 229910005965 SO 2 Inorganic materials 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- WVOLTBSCXRRQFR-DLBZAZTESA-M cannabidiolate Chemical compound OC1=C(C([O-])=O)C(CCCCC)=CC(O)=C1[C@H]1[C@H](C(C)=C)CCC(C)=C1 WVOLTBSCXRRQFR-DLBZAZTESA-M 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
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- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 2
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 description 2
- BCJIMAHNJOIWKQ-UHFFFAOYSA-N 4-[(1,3-dioxo-2-benzofuran-4-yl)oxy]-2-benzofuran-1,3-dione Chemical compound O=C1OC(=O)C2=C1C=CC=C2OC1=CC=CC2=C1C(=O)OC2=O BCJIMAHNJOIWKQ-UHFFFAOYSA-N 0.000 description 2
- APXJLYIVOFARRM-UHFFFAOYSA-N 4-[2-(3,4-dicarboxyphenyl)-1,1,1,3,3,3-hexafluoropropan-2-yl]phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(C(O)=O)C(C(O)=O)=C1 APXJLYIVOFARRM-UHFFFAOYSA-N 0.000 description 2
- YGYCECQIOXZODZ-UHFFFAOYSA-N 4415-87-6 Chemical compound O=C1OC(=O)C2C1C1C(=O)OC(=O)C12 YGYCECQIOXZODZ-UHFFFAOYSA-N 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 2
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- YTVNOVQHSGMMOV-UHFFFAOYSA-N naphthalenetetracarboxylic dianhydride Chemical compound C1=CC(C(=O)OC2=O)=C3C2=CC=C2C(=O)OC(=O)C1=C32 YTVNOVQHSGMMOV-UHFFFAOYSA-N 0.000 description 2
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- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1039—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors comprising halogen-containing substituents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1042—Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1057—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain
- C08G73/1064—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain containing sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/14—Polyamide-imides
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
Definitions
- the present invention relates to an optical film including a polymer resin having excellent folding performance and a display device including the same.
- an optical film instead of glass as a cover window is under review.
- it In order for an optical film to be used as a cover window of a display device, it must have excellent optical and mechanical properties, and must also have excellent folding properties in order to be folded.
- polyimide (PI)-based resins have excellent insolubility, chemical resistance, heat resistance, radiation resistance, and low-temperature characteristics, and are used in automobile materials, aviation materials, spacecraft materials, insulation coatings, insulation films, and protective films. there is.
- polyamide-imide-based resins in which amide repeating units are added to polyimide-based resins have been developed, and films manufactured using polyamide-imide-based resins have optical properties, insolubility, chemical resistance, heat resistance, and radiation resistance. And mechanical properties such as low-temperature properties are excellent, and at the same time, folding properties are excellent.
- the amide repeating unit may be prepared by polymerization of a diamine-based compound and a dicarbonyl-based compound.
- TFDB 2,2'-bis(trifluoromethyl)benzidine
- dicarbonyl-based due to the rigid structure of TFDB, dicarbonyl-based During polymerization with the compound, there is a problem that the polymerization reaction does not occur sufficiently because the dicarbonyl-based compound is gelated.
- One embodiment of the present invention is to provide an optical film including a polymer resin having excellent folding properties.
- one embodiment of the present invention is to provide an optical film excellent in optical properties and mechanical properties.
- An embodiment of the present invention provides an optical film that includes a polymer resin, has a yellowness of 3.0 or less, and has a folding performance parameter calculated by Equation 1 below of 1.5 GPa or less.
- Equation 1 R is the radius of curvature of the optical film at the center line of folding when folded, is 0.5 mm, d is the thickness of the optical film, the unit of thickness is ⁇ m, and E' is the elastic strain calculated by Equation 2 below is the exponent
- Equation 2 only numbers are substituted for the radius of curvature and the thickness, excluding units.
- Equation 2 E is the modulus of the optical film, the unit of the modulus is GPa, and v is the Poisson's ratio of the optical film.
- the elastic strain index (E′) calculated by Equation 2 may be 5.5 or more.
- the polymer resin may include an imide repeating unit and an amide repeating unit.
- the amide repeating unit may be included in a ratio of 80% or more with respect to the number of the imide repeating unit and the number of the amide repeating unit.
- the imide repeating unit may include a first repeating unit and a second repeating unit.
- the amide repeating unit may include a third repeating unit and a fourth repeating unit.
- the first repeating unit is an imide repeating unit obtained by polymerization of a first diamine-based compound and a first dianhydride-based compound
- the second repeating unit is a polymerization reaction between a second diamine-based compound and a second dianhydride-based compound. It may be a reacted imide repeating unit.
- the third repeating unit is an amide repeating unit in which a first diamine-based compound and a first dicarbonyl-based compound are polymerized
- the fourth repeating unit is an amide repeating unit in which a second diamine-based compound and a second dicarbonyl-based compound are polymerized. It may be a repeating unit.
- the first diamine-based compound may be 2,2'-bis (trifluoromethyl) benzidine (TFDB).
- the second diamine-based compound is a diamine-based compound containing at least one functional group selected from the group consisting of a sulfonyl group, a carbonyl group, a methylene group, a propylene group, and a halogen element.
- a sulfonyl group a carbonyl group, a methylene group, a propylene group, and a halogen element.
- the second diamine-based compound is bis (3-aminophenyl) sulfone (Bis (3-aminophenyl) sulfone, 3DDS), bis (4-aminophenyl) sulfone (Bis (4-aminophenyl) sulfone, 4DDS), 2, 2-bis (3-aminophenyl) hexafluoropropane (2,2-Bis (3-aminophenyl) hexafluoropropane, 3,3'-6F), 2,2-bis (4-aminophenyl) hexafluoropropane ( 2,2-Bis(4-aminophenyl)hexafluoropropane, 4,4'-6F), 4,4'-Methylenedianiline (MDA), 3,3'-diaminobenzophenone (3 ,3'-Diaminobenzophenone), 4,4'-diaminobenzophenone, and tetrachloridebenzidine (CI
- a mole ratio of the first diamine-based compound and the second diamine-based compound subjected to polymerization may be 95:5 to 50:50.
- the polymer resin may have a weight-average molecular weight (Mw) of 200,000 to 500,000.
- Another embodiment of the present invention the display panel; and an optical film according to any one of claims 1 to 13 disposed on the display panel.
- it is intended to provide an optical film having excellent folding characteristics.
- the optical film according to another embodiment of the present invention has excellent optical and mechanical properties, when used as a cover window of a display device, it can effectively protect the display surface of the display device.
- FIG. 1 is a cross-sectional view of an optical film showing a change in length when the optical film is folded.
- FIG. 2 is a cross-sectional view of a portion of a display device according to another exemplary embodiment of the present invention.
- FIG. 3 is an enlarged cross-sectional view of portion “P” in FIG. 2 .
- spatially relative terms “below, beneath”, “lower”, “above”, “upper”, etc. refer to one element or component as shown in the drawing. It can be used to easily describe the correlation between and other elements or components. Spatially relative terms should be understood as terms that include different orientations of elements in use or operation in addition to the directions shown in the figures. For example, when flipping elements shown in the figures, elements described as “below” or “beneath” other elements may be placed “above” the other elements. Thus, the exemplary term “below” may include directions of both below and above. Likewise, the exemplary terms “above” or “above” can include both directions of up and down.
- first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.
- At least one should be understood to include all possible combinations from one or more related items.
- at least one of the first item, the second item, and the third item means not only the first item, the second item, or the third item, but also two of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from one or more.
- An optical film according to an embodiment of the present invention provides an optical film.
- An optical film according to an embodiment of the present invention includes a polymer resin.
- the polymer resin may be included in various shapes and forms, such as a powder form in a film, a form dissolved in a solution, and a matrix form solidified after dissolution in a solution, and the resin surface containing the same repeating unit as in the present invention may have any shape or form. And all can be seen as the same as the polymer resin of the present invention.
- the polymer resin may be present in a matrix form in which a polymer resin solution is applied and then dried and solidified in the film.
- the folding performance parameter of the optical film calculated by Equation 1 below is 1.5 GPa or less.
- Equation 1 R is the radius of curvature of the optical film at the center line of folding when folded, is 0.5 mm, d is the thickness of the optical film, the unit of thickness is ⁇ m, and E' is the elastic strain calculated by Equation 2 below is the exponent
- the thickness of the optical film can be measured using an electronic micrometer, for example, Anritsu Electronic Micrometer.
- the radius of curvature of the optical film can be measured by using a bending repeater, for example, YUASA's DLDM111LHA, after folding in the device, and checking the gap between the inner folds with a gap gauge.
- YUASA's DLDM111LHA a bending repeater
- Equation 2 E is the modulus of the optical film, the unit of the modulus is GPa, and v is the Poisson's ratio of the optical film.
- the modulus of the optical film can be measured under the following conditions using a universal testing machine (eg, INSTRON) according to the standard ASTM D882.
- a universal testing machine eg, INSTRON
- the Poisson's ratio of an optical film is the ratio of the lateral strain to the axial strain of a specimen subjected to an axial load, and can be measured by a video extensometer according to the standard ASTM E-132. Specifically, it can be measured under the following conditions using a universal testing machine (for example, Instron 3367 from Instron).
- FIG. 1 is a cross-sectional view of an optical film showing a change in length when the optical film is folded.
- 1 is just one example for showing a change in length of an optical film when folded, and the change in length when folded may have a different shape for each optical film. Therefore, the present invention is not limited thereto.
- the folding performance parameter of the optical film When the folding performance parameter of the optical film is 1.5 GPa or less, resistance generated during folding is reduced, and thus excellent folding performance may be exhibited and no folding marks may be generated.
- the folding performance is excellent and no folding marks are generated.
- the radius of curvature (R) in the "folding performance parameter” is 0.5 mm, and when the "folding performance parameter" is 1.5 GPa or less, no folding marks occur even when folding with the radius of curvature (R) of 0.5 mm, and excellent folding performance can have
- mechanical changes of the film may occur when the optical film is folded.
- the folding marks are, for example, the film is bent, or the surface of the film is unevenly wrinkled, or a transparent film. It means that there is a phenomenon in which white turbidity occurs.
- a difference in length before and after folding may occur, or a change in mechanical and optical properties of the optical film, such as a difference in light transmittance, may be included.
- the distance between two points (a, b) of the inner diameter and the distance between two points (c, d) of the outer diameter are the same.
- the two points a and b of the folding inner diameter of the optical film are deformed into a' and b' by the compressive stress during folding, and the two points c and d of the folding outer diameter are It is deformed into c' and d' by tensile stress. Due to the compressive stress of the folding inner diameter, the distance between a' and b' is smaller than the distance between a and b, and the distance between c' and d' of the folding outer diameter is increased than the distance between c and d.
- the radius of curvature (R1) of the inner diameter of folding is "Rd/2" with respect to the center line (M) of the optical film
- the radius of curvature (R2) of the outer diameter of folding is "R+” with respect to the center line (M) of the optical film. d/2".
- the calculated distance (L 1 ) between a' and b' is ⁇ (Rd/2)
- the distance (L 2 ) between c' and d' is ⁇ ( R+d/2).
- Compressive stress and tensile stress are proportional to the magnitude of the deformed length.
- Folding performance of the optical film may be improved as the forces applied to the outer and inner diameters are reduced. Therefore, the smaller the value of d/2R of the optical film is, the more advantageous it is for folding. Specifically, when d / 2R is 0.08 or less, the folding performance of the optical film is excellent, so no folding marks are generated, and when it exceeds 0.08, excessive pressure is applied during folding, and folding marks may occur after folding. .
- the folding performance parameter of the optical film is proportional to the elastic strain index (E'). As the elastic strain index (E') increases, the folding performance of the optical film improves, and as the elastic strain index (E') decreases, the folding performance of the optical film decreases.
- the optical film may have an elastic strain index (E') of 5.5 GPa or more calculated by Equation 2 above.
- E' elastic strain index
- the folding performance of the optical film can be improved by adjusting the modulus and Poisson's ratio of the optical film as well as the thickness and radius of curvature of the film. As the modulus and Poisson's ratio of the optical film increase, resistance to deformation of the optical film increases during folding. For example, even if the thickness of the optical film increases, when the modulus of the optical film increases, folding performance may be improved.
- the folding performance deteriorates, making it unsuitable for use as a cover window of a flexible display device. Further, even when the Poisson's ratio of the optical film increases, the folding performance can be improved, and conversely, when the Poisson's ratio of the optical film decreases, the folding performance deteriorates.
- the optical film may have a yellow index (Y.I.) of 3.0 or less. Yellowness can be measured using a spectrophotometer (CM-3700D, KONICA MINOLTA) according to the standard ASTM E313.
- CM-3700D spectrophotometer
- KONICA MINOLTA KONICA MINOLTA
- the optical film may include a polymer resin.
- the optical film may have a folding performance parameter of 1.5 GPa or less by adjusting the components and content of the repeating unit of the polymer resin. In addition, by increasing the degree of polymerization of the polymer resin, it is possible to reduce folding performance parameters and improve folding performance.
- the polymer resin may include at least one of an imide repeating unit and an amide repeating unit.
- the polymer resin may include an imide repeating unit or an amide repeating unit, or may include both an imide repeating unit and an amide repeating unit.
- the polymer resin may be at least one of a polyimide-based resin, a polyamide-based resin, and a polyamide-imide-based resin.
- the imide repeating unit of the polymer resin may be prepared from monomer components including a diamine-based compound and a dianhydride-based compound.
- An imide repeating unit may be formed by polymerizing a diamine-based compound and a dianhydride-based compound to form amic acid, and imidating the amic acid again.
- the amide repeating unit may be prepared by a polymer polymerization reaction from monomer components including a diamine-based compound and a dicarbonyl-based compound.
- the specific structure of the imide repeating unit and the amide repeating unit may vary depending on the reacting monomer.
- the polymer resin according to an embodiment of the present invention is not limited thereto.
- the polymer resin according to an embodiment of the present invention may be prepared from monomer components further including other compounds in addition to the diamine-based compound, the dianhydride-based compound, and the dicarbonyl-based compound. Therefore, the polymer resin according to an embodiment of the present invention may further have other repeating units in addition to the imide repeating unit and the amide repeating unit.
- An optical film according to an embodiment of the present invention may include at least one of a polyimide-based resin, a polyamide resin-based resin, and a polyamide-imide-based resin.
- the optical film may be any one of a polyimide-based film, a polyamide-based film, and a polyamide-imide-based film.
- an embodiment of the present invention is not limited thereto, and any film having light transmission may be an optical film according to an embodiment of the present invention.
- the polymer resin may include amide repeating units at a ratio of 80% or more to the total number of imide repeating units and amide repeating units.
- the number of amide repeating units may be included in a ratio of 95% or more to the total number of imide and amide repeating units. More preferably, it may be included in a ratio of 98% or more.
- the polymer resin contains amide repeating units at a ratio of 80% or more with respect to the number of imide and amide repeating units
- mechanical properties may be improved while maintaining optical properties of the film when manufacturing an optical film using the polymer resin.
- the folding performance of the optical film can be remarkably improved. That is, by including more amide repeating units than imide repeating units, a colorless and transparent film having excellent insolubility, chemical resistance, heat resistance, radiation resistance and low-temperature characteristics, and excellent folding performance can be prepared.
- the present invention can reduce and prevent gelation of dicarbonyl-based compounds by conducting a polymerization reaction using two or more types of diamine-based compounds.
- the imide repeating unit may include a first repeating unit and a second repeating unit.
- the imide repeating unit is formed by polymerization of a diamine-based compound and a dianhydride-based compound
- the first repeating unit is an imide repeating unit obtained by polymerization of a first diamine-based compound and a first dianhydride-based compound
- the second repeating unit is an imide repeating unit obtained by polymerization of the second diamine-based compound and the second dianhydride-based compound.
- the polymer resin of the present invention includes repeating units derived from at least two or more diamine-based compounds, including a first diamine-based compound and a second diamine-based compound.
- the first diamine-based compound may be 2,2'-bis (trifluoromethyl) benzidine (TFDB).
- the second diamine-based compound may include other aromatic diamine-based compounds other than TFDB.
- the imide repeating unit and amide repeating unit of the present invention are TFDB; and aromatic diamine-based compounds other than TFDB;
- TFDB 2,2'-Bis(trifluoromethyl)benzidine
- TFDB 2,2'-bis(trifluoromethyl)benzidine
- a polymerization reaction proceeds quickly when reacted with a dicarbonyl-based compound. Due to the rapid polymerization reaction, only a part of the dicarbonyl-based compound reacts with the diamine-based compound, and other dicarbonyl-based compounds do not undergo a polymerization reaction and gelation may occur. Gelation of the dicarbonyl-based compound may decrease the polymerization degree of the resin and deteriorate the optical properties of the film. Therefore, it is difficult to prepare a polymer resin containing a large amount of amide repeating units by adding only 2,2'-bis(trifluoromethyl)benzidine (TFDB). In the present invention, gelation of the dicarbonyl-based compound can be prevented and the polymerization degree of the polymer can be improved by using the second diamine-based compound.
- the second diamine-based compound includes an aromatic diamine-based compound.
- aromatic diamine-based compound refers to a diamine-based compound in which an amino group is directly bonded to an aromatic ring, and may include an aliphatic group or other substituents in a part of its structure.
- the aromatic ring may be a single ring or a bonded ring in which single rings are directly or heteroatom-linked, or a condensed ring.
- the aromatic ring may include, for example, a benzene ring, a biphenyl ring, a naphthalene ring, an anthracene ring, and a fluorene ring, but is not limited thereto.
- the second diamine-based compound may be represented by Formula 1 below.
- a 1 represents a divalent aromatic organic group.
- An aromatic organic group refers to an organic group in which pi electrons are delocalized by forming a ring by alternating single bonds and double bonds.
- a 1 includes a divalent aromatic organic group having 4 to 40 carbon atoms.
- a hydrogen atom in the aromatic organic group included in Formula 1 may be substituted with a halogen element, a hydrocarbon group, or a hydrocarbon group substituted with a halogen element.
- the hydrocarbon group substituted with a hydrogen atom or the hydrocarbon group substituted with a halogen element may have 1 to 8 carbon atoms.
- hydrogen contained in A 1 may be substituted with -F, -CH 3 , -CF 3 , and the like.
- An optical film prepared using a diamine-based compound in which hydrogen atoms are substituted with fluorine-substituted hydrocarbon groups may have excellent light transmittance and excellent processing characteristics.
- a 1 of Formula 1 may include, for example, a structure represented by any one of the following structural formulas.
- * represents a binding position.
- X may independently be any one of a single bond, O, S, SO 2 , CO, CH 2 , C(CH 3 ) 2 and C(CF 3 ) 2 .
- the binding position of X to each ring is not particularly limited, the binding position of X may be, for example, a meta or para position to each ring.
- the second diamine-based compound is one selected from the group consisting of a sulfonyl group, a carbonyl group, a methylene group, a propylene group, and a halogen element. It may contain more than one functional group.
- a sulfonyl group, a carbonyl group, a methylene group, a propylene group, and a halogen substituent play a role in controlling the movement of electrons in a compound.
- the ionization energy of the second diamine-based compound may be controlled by including at least one substituent selected from among a sulfonyl group, a carbonyl group, a methylene group, a propylene group, and a halogen element. Accordingly, the reactivity and reaction rate of the polymerization reaction with the dicarbonyl-based compound can be appropriately controlled.
- the second diamine-based compound is bis (3-aminophenyl) sulfone (Bis (3-aminophenyl) sulfone, 3DDS), bis (4-aminophenyl) sulfone (Bis (4-aminophenyl) )sulfone, 4DDS), 2,2-bis(3-aminophenyl)hexafluoropropane (2,2-Bis(3-aminophenyl)hexafluoropropane, 3,3'-6F), 2,2-bis(4- Aminophenyl)hexafluoropropane (2,2-Bis(4-aminophenyl)hexafluoropropane, 4,4'-6F), 4,4'-Methylenedianiline (MDA), 3,3 At least one selected from the group consisting of '-diaminobenzophenone (3,3'-Diaminobenzophenone), 4,4'-dia
- the first dianhydride-based compound and the second dianhydride-based compound may each independently be represented by Chemical Formula 2 below.
- the first dianhydride-based compound and the second dianhydride-based compound may be identical to each other or may be different compounds.
- the present invention is not limited thereto.
- a 2 represents a tetravalent organic group.
- a 2 may include a tetravalent organic group having 4 to 40 carbon atoms.
- a hydrogen atom in the organic group included in Formula 2 may be substituted by a halogen element, a hydrocarbon group, or a halogen-substituted hydrocarbon group.
- the hydrogen atom and the substituted hydrocarbon group or the halogen-substituted hydrocarbon group may have 1 to 8 carbon atoms.
- a 2 of Formula 2 may include, for example, a structure represented by any one of the following structural formulas.
- * represents a binding position.
- Z may be independently any one of a single bond, O, S, SO 2 , CO, (CH 2 )n, (C(CH3) 2 )n and (C(CF3) 2 )n, and n may be an integer from 1 to 5.
- the binding position of Z to each ring is not particularly limited, the binding position of Z may be, for example, a meta or para position to each ring.
- the first dianhydride-based compound and the second dianhydride-based compound are each independently 2,2-bis (3,4-dicarboxyphenyl) hexafluoropropane dianhydride ( 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA), biphenyl tetracarboxylic dianhydride (BPDA), naphthalene tetracarboxylic dianhydride (NTDA) , diphenyl sulfone tetracarboxylic dianhydride (DSDA), 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene- 1,2-dicarboxylic anhydride (4-(2,5-Oxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic Anhydride (4-(2,5-
- An optical film according to an embodiment of the present invention may include several dianhydride-based compounds.
- An optical film prepared using a dianhydride-based compound in which hydrogen atoms are substituted with fluorine-substituted hydrocarbon groups may have excellent light transmittance and excellent processing characteristics.
- the amide repeating unit may include a third repeating unit and a fourth repeating unit.
- the amide repeating unit is formed by polymerization of a diamine-based compound and a dicarbonyl-based compound
- the third repeating unit is an amide repeating unit obtained by polymerization of a first diamine-based compound and a first dicarbonyl-based compound
- the fourth repeating unit is It is an amide repeating unit in which the second diamine-based compound and the second dicarbonyl-based compound are polymerized.
- the first dicarbonyl-based compound and the second dicarbonyl-based compound may each independently be represented by Chemical Formula 3 below.
- the first dicarbonyl-based compound and the second dicarbonyl-based compound may be identical to each other or may be different compounds.
- the present invention is not limited thereto.
- a 3 represents a divalent organic group.
- a 3 may include a divalent organic group having 4 to 40 carbon atoms.
- a hydrogen atom in the organic group included in Formula 3 may be substituted by a halogen element, a hydrocarbon group, or a fluorine-substituted hydrocarbon group.
- the hydrogen atom-substituted hydrocarbon group or the fluorine-substituted hydrocarbon group may have 1 to 8 carbon atoms.
- hydrogen contained in A 3 may be substituted with -F, -CH 3 , -CF 3 and the like.
- a 3 of Formula 3 may include, for example, a structure represented by any one of the following structural formulas.
- * represents a binding position.
- Y may independently be any one of a single bond, O, S, SO 2 , CO, CH 2 , C(CH 3 ) 2 and C(CF 3 ) 2 .
- the binding position of Y and each ring is not particularly limited, the binding position of Y may be, for example, a meta or para position with respect to each ring.
- the first dicarbonyl-based compound and the second dicarbonyl-based compound are each independently terephthaloyl chloride (TPC), isophthaloyl dichloride (IPC), Composed of phenyl dicarbonyl chloride (BPDC), 4,4'-oxybis benzoyl chloride (OBBC) and naphthalene dicarbonyl dichloride (NTDC) It may include any one or more selected from the group.
- TPC terephthaloyl chloride
- IPC isophthaloyl dichloride
- BPDC phenyl dicarbonyl chloride
- OBBC 4,4'-oxybis benzoyl chloride
- NTDC naphthalene dicarbonyl dichloride
- the ratio of the number of the first repeating unit and the third repeating unit to the number of the second repeating unit and the fourth repeating unit may be 95:5 to 50:50.
- Both the first repeating unit and the third repeating unit are repeating units in which the first diamine-based compound participates in the polymerization reaction
- the second repeating unit and the fourth repeating unit are both repeating units in which the second diamine-based compound participates in the polymerization reaction. Accordingly, the molar ratio between the first diamine-based compound and the second diamine-based compound participating in the polymerization is 95:5 to 50:50.
- the ratio of the number of the first repeating unit and the third repeating unit to the number of the second repeating unit and the fourth repeating unit is greater than 95:5
- the number of the first repeating unit and the third repeating unit is greater than that derived from TFDB and a dicarbonyl-based compound
- the haze of the film may increase with an increase in the repeating unit ratio.
- the number of the second repeating unit and the fourth repeating unit is greater than 50:50, heat resistance and strength of the film may be deteriorated.
- the polymer resin according to an embodiment of the present invention may include a first repeating unit represented by Chemical Formula 4 and a second repeating unit represented by Chemical Formula 5 below.
- a 2 included in Formula 4 is as already described.
- a 1 and A 2 included in Formula 5 are as already described.
- the polymer resin according to an embodiment of the present invention may include a third repeating unit represented by Chemical Formula 6 and a fourth repeating unit represented by Chemical Formula 7 below.
- a 3 included in Formula 6 is as already described.
- a 1 and A 3 included in Chemical Formula 7 are as described above.
- the weight-average molecular weight (Mw) of the polymer resin of the present invention may be 200,000 to 500,000.
- the weight average molecular weight of the polymer resin can be measured under the following conditions using GPC (Alliance e2695/2414 RID, waters).
- the degree of polymerization of a polymer resin containing a large amount of amide repeating units is low because dicarbonyl-based compounds are gelated due to a fast reaction rate with diamine-based compounds, particularly TFDB.
- the weight average molecular weight is proportional to the degree of polymerization, and when the degree of polymerization decreases, the weight average molecular weight of the polymer resin also decreases.
- the weight average molecular weight of the polymer resin is less than 200,000, the degree of polymerization decreases and the number of end groups of the polymer chain increases, resulting in deterioration in physical properties of the polymer resin.
- the polymer resin controls the weight average molecular weight by managing the polymerization viscosity during polymerization.
- the weight average molecular weight of the resin exceeds 500,000, the polymerization viscosity is very high and the flowability of the reaction solution is lowered, making it difficult to control and process.
- a large amount of solvent is required, which is disadvantageous in terms of the process.
- the optical film has a light transmissive property.
- the optical film has a flexible property.
- the optical film has bending characteristics, folding characteristics, and rollable characteristics.
- Optical films may have excellent mechanical and optical properties.
- the optical film may have a thickness sufficient to protect the display panel.
- the optical film may have a thickness of 10 to 100 ⁇ m.
- the optical film based on the thickness of 50 ⁇ m, may have an average light transmittance of 88% or more in the visible ray region measured by a UV spectrophotometer.
- the average light transmittance of the optical film can be measured at a wavelength of 360 to 740 nm using a spectrophotometer (CM-3700D, KONICA MINOLTA).
- the optical film may have a haze of 0.5% or less based on a thickness of 50 ⁇ m.
- the haze of the optical film was measured 5 times according to ASTM D1003 using MURAKAMI's haze meter (model name: HM-150) by cutting the manufactured optical film into 50 mm ⁇ 50 mm, and taking the average value as the haze of the optical film. can do.
- FIG. 2 is a cross-sectional view of a part of a display device 200 according to another exemplary embodiment of the present invention
- FIG. 3 is an enlarged cross-sectional view of part “P” in FIG. 2 .
- a display device 200 includes a display panel 501 and an optical film 100 on the display panel 501 .
- the display panel 501 includes a substrate 510, a thin film transistor (TFT) on the substrate 510, and an organic light emitting element 570 connected to the thin film transistor (TFT).
- the organic light emitting device 570 includes a first electrode 571 , an organic light emitting layer 572 on the first electrode 571 , and a second electrode 573 on the organic light emitting layer 572 .
- the display device 200 shown in FIGS. 2 and 3 is an organic light emitting display device.
- Substrate 510 may be made of glass or plastic. Specifically, the substrate 510 may be made of plastic such as a polymer resin or an optical film. Although not shown, a buffer layer may be disposed on the substrate 510 .
- a thin film transistor is disposed on the substrate 510 .
- the thin film transistor (TFT) includes a semiconductor layer 520, a gate electrode 530 insulated from the semiconductor layer 520 and overlapping at least a portion of the semiconductor layer 520, a source electrode 541 connected to the semiconductor layer 520, and A drain electrode 542 spaced apart from the source electrode 541 and connected to the semiconductor layer 520 is included.
- a gate insulating layer 535 is disposed between the gate electrode 530 and the semiconductor layer 520 .
- An interlayer insulating layer 551 may be disposed on the gate electrode 530 , and a source electrode 541 and a source electrode 541 may be disposed on the interlayer insulating layer 551 .
- the planarization layer 552 is disposed on the thin film transistor TFT to planarize an upper portion of the thin film transistor TFT.
- the first electrode 571 is disposed on the planarization layer 552 .
- the first electrode 571 is connected to the thin film transistor TFT through a contact hole provided in the planarization layer 552 .
- the bank layer 580 is disposed on a portion of the first electrode 571 and the planarization layer 552 to define a pixel area or light emitting area. For example, since the bank layer 580 is arranged in a matrix structure in a boundary area between a plurality of pixels, a pixel area may be defined by the bank layer 580 .
- An organic emission layer 572 is disposed on the first electrode 571 .
- the organic emission layer 572 may also be disposed on the bank layer 580 .
- the organic light emitting layer 572 may include one light emitting layer or may include two light emitting layers stacked one above the other. Light having one of red, green, and blue colors may be emitted from the organic emission layer 572, and white light may also be emitted.
- the second electrode 573 is disposed on the organic light emitting layer 572 .
- the organic light emitting element 270 may be formed by stacking the first electrode 571 , the organic light emitting layer 572 , and the second electrode 573 .
- each pixel may include a color filter for filtering white light emitted from the organic light emitting layer 572 for each wavelength.
- a color filter is formed on the light movement path.
- a thin film encapsulation layer 590 may be disposed on the second electrode 573 .
- the thin film encapsulation layer 590 may include at least one organic layer and at least one inorganic layer, and at least one organic layer and at least one inorganic layer may be alternately disposed.
- the optical film 100 is disposed on the display panel 501 having the above-described laminated structure.
- the optical film manufacturing method of the present invention includes preparing a polymer resin; preparing a polymer resin solution by dissolving the polymer resin in a solvent; and preparing an optical film using the polymer resin solution.
- the step of preparing the polymer resin may be obtained by polymerizing monomers for forming the polymer resin.
- the polymer resin is a first diamine-based compound, a second diamine-based compound, a first dianhydride-based compound, a second dianhydride-based compound, a first dicarbonyl-based compound and a second It can be prepared from monomer components including dicarbonyl-based compounds.
- the present invention is not limited by the order and method of adding monomers, but, for example, the first and second dianhydride-based compounds and the first and second diamine-based compounds are added to a solution in which the first and second diamine-based compounds are dissolved.
- a polymerization reaction may be performed by sequentially adding rebornyl-based compounds.
- the first diamine-based compound, the first and second dianhydride-based compounds, the second diamine-based compound, and the first and second dicarbonyl-based compounds may be added in this order, and the second A polymerization reaction may be performed by adding the diamine-based compound, the first and second dianhydride-based compounds, the first diamine-based compound, and the first and second dicarbonyl-based compounds in that order.
- the polymer resin is a polymer polymerization reaction and imidation of monomers including the first diamine-based compound, the second diamine-based compound, the first and second dianhydride-based compounds, and the first and second dicarbonyl-based compounds.
- An imide repeating unit may be prepared by a polymer polymerization reaction and imidation of monomers including the first and second diamine-based compounds and the first and second dianhydride-based compounds.
- an amide repeating unit may be prepared by a polymer polymerization reaction of monomers including the first and second diamine-based compounds and the first and second dicarbonyl-based compounds.
- the polymer resin according to another embodiment of the present invention may have an imide repeating unit and an amide repeating unit.
- the imide repeating unit and the amide repeating unit may be separately prepared and then copolymerized, or the imide repeating unit may be prepared first and then a dicarbonyl-based compound may be further added to prepare the amide repeating unit. After the first preparation, a dianhydride-based compound may be further added to prepare the imide repeating unit.
- the polymer resin of the present invention is not limited by the order in which repeating units are prepared (the order in which monomers are added).
- the first and second dicarbonyl-based compounds are based on the molar amount of the sum of the first and second dianhydride-based compounds and the first and second dicarbonyl-based compounds. It may be added in an amount of 80 mol% or more. Accordingly, the polymer resin of the present application contains amide repeating units at a ratio of 80% or more.
- the first and second dicarbonyl-based compounds are added in an amount of 95 mol% or more based on the total molar amount of the first and second dianhydride-based compounds and the first and second dicarbonyl-based compounds. It may be, more preferably, it may be added in an amount of 98 mol% or more.
- the first diamine-based compound is 2,2'-bis (trifluoromethyl) benzidine (2,2'-Bis (trifluoromethyl) benzidine, TFDB).
- the second diamine-based compound includes an aromatic diamine-based compound.
- 2,2'-bis (trifluoromethyl) benzidine (2,2'-Bis (trifluoromethyl) benzidine, TFDB) may be used as the first diamine-based compound, and the second diamine-based compound of Formula 1 described above Aromatic diamine-based compounds may be used, and the compounds of Formula 2 described above may be used as the first and second dianhydride-based compounds.
- the first and second dicarbonyl-based compounds the above-described compounds represented by Formula 3 may be used.
- the aromatic diamine-based compound of the second diamine-based compound is a sulfonyl group, a carbonyl group, a methylene group, a propylene group, and a halogen element. It may contain one or more functional groups selected from the group consisting of
- the aromatic diamine-based compound of the second diamine-based compound is bis (3-aminophenyl) sulfone (3DDS) or bis (4-aminophenyl) sulfone.
- the addition ratio of the first diamine-based compound and the second diamine-based compound may be 95:5 to 50:50.
- the solvent in the step of preparing the polymer resin solution is, for example, dimethylacetamide (DMAc, N,N-dimethylacetamide), dimethylformamide (DMF, N,N-dimethylformamide ), methylpyrrolidone (NMP, 1-methyl-2-pyrrolidinone), m-cresol, tetrahydrofuran (THF), chloroform, methyl ethyl ketone (MEK ), etc., and mixtures thereof may be used.
- DMAc dimethylacetamide
- DMF dimethylformamide
- NMP N,N-dimethylformamide
- NMP methylpyrrolidone
- m-cresol methylpyrrolidone
- THF tetrahydrofuran
- MEK methyl ethyl ketone
- the resulting polymer resin solution was cast.
- a casting substrate is used for casting.
- the type of casting substrate is not particularly limited.
- As the casting substrate a glass substrate, a stainless (SUS) substrate, a Teflon substrate, or the like may be used.
- an organic substrate may be used as a casting substrate.
- the obtained polymer resin solution was applied to a glass substrate, cast, and dried in hot air at 80 ° C for 20 minutes and at 120 ° C for 20 minutes to prepare a film, and then the prepared film was peeled from the glass substrate and placed in a frame. fixed with a pin.
- the frame on which the film was fixed was placed in an oven and dried with isothermal air for 10 minutes at 270 ° C. As a result, an optical film with a thickness of 50 ⁇ m was completed.
- Example 2 In the same manner as in Example 1, only the addition amount of the first diamine-based compound, the type and addition amount of the second diamine-based compound, the addition amount of the dianhydride-based compound, and the type and addition amount of the dicarbonyl-based compound were changed to Examples 2 to 14 An optical film of was prepared.
- Example 1 the amount of the first diamine-based compound, the type and amount of the second diamine-based compound, the amount of the dianhydride-based compound, and the type and amount of the dicarbonyl-based compound are shown in Table 1 below.
- the resulting polymer resin solution was cast.
- a casting substrate is used for casting.
- the type of casting substrate is not particularly limited.
- As the casting substrate a glass substrate, a stainless (SUS) substrate, a Teflon substrate, or the like may be used.
- an organic substrate may be used as a casting substrate.
- the obtained polymer resin solution was applied to a glass substrate, cast, and dried in hot air at 80 ° C for 20 minutes and at 120 ° C for 20 minutes to prepare a film, and then the prepared film was peeled from the glass substrate and placed in a frame. fixed with a pin.
- the frame on which the film was fixed was placed in an oven and dried with isothermal air for 10 minutes at 270 ° C. As a result, an optical film with a thickness of 50 ⁇ m was completed.
- the optical films of Comparative Examples 5 and 6 were prepared by varying the addition amount of the first diamine-based compound, the addition amount of the second diamine-based compound, the addition amount of the dianhydride-based compound, and the addition amount of the dicarbonyl-based compound. manufactured.
- the addition amount of the first diamine-based compound, the addition amount of the second diamine-based compound, the addition amount of the dianhydride-based compound, and the addition amount of the dicarbonyl-based compound in Comparative Examples 5 and 6 are shown in Table 1 below.
- TFDB 2,2'-Bis(trifluoromethyl)benzidine
- 3DDS Bis(3-aminophenyl)sulfone
- CBDA Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
- Weight average molecular weight of polymer resin Using GPC (Alliance e2695/2414 RID, waters), the weight average molecular weight of polymer resin was measured under the following conditions.
- Modulus According to the standard ASTM D882, it was measured using a universal tensile tester (eg, INSTRON Co.) under the following conditions.
- Poisson's ratio The Poisson's ratio of the optical film was measured by a video extensometer according to the standard ASTM E-132. Specifically, it was measured under the following conditions using a universal testing machine (for example, Instron 3367 from Instron).
- Elastic strain index (E') The elastic strain index (E') of the optical film can be calculated by the following formula 2.
- Yellowness was measured using a spectrophotometer (CM-3700D, KONICA MINOLTA) according to the standard ASTM E313.
- Folding performance parameter of the optical film can be calculated by Equation 1 below.
- Equation 1 R is the radius of curvature of the optical film at the folding center line during folding, the unit of the radius of curvature is mm, d is the thickness of the optical film, the unit of thickness is ⁇ m, and E' is the elastic strain index .
- Equation 1 only numbers are substituted for the radius of curvature and the thickness, excluding units.
- Optical transmittance (%) Using a spectrophotometer (CM-3700D, KONICA MINOLTA), average optical transmittance was measured at a wavelength of 360 to 740 nm.
- Haze The manufactured optical film was cut into 50 mm ⁇ 50 mm and measured 5 times according to ASTM D1003 using a haze meter (model name: HM-150) manufactured by MURAKAMI, and the average value was determined as the haze value.
- Folding marks A 100 mm X 50 mm sample randomly obtained from the optical film was subjected to a bending test centered on one bending axis.
- a 100 mm X 50 mm sample was repeatedly bent 200,000 times at a speed of 60 rpm with a radius of curvature of 2.0 mm (diameter 4.0 mm) at 25 o C/50 RH% using a bending repetition evaluation machine (YUASA, DLDM111LHA). After the test, the occurrence of folding traces was analyzed around the bending axis.
- an analysis method may be required to further clarify the contrast (shading) of the fold marks.
- it can be performed using a film foreign material inspection method as an imaging method.
- Various inspection methods such as reflection type, scattering type, and transmission type can be used to detect defects or pressed marks that are difficult to catch with the naked eye or CCD camera as much as possible, and foreign substances of the same color as the material.
- it is a device.
- a specific example is an inspection device + control unit (controller box: converts laser data received through the inspection device into image data) + dedicated PC (image PC: a PC registered with a dedicated application, which can be connected to the control unit (controller box) and process images PC)
- control unit control unit
- image PC a PC registered with a dedicated application
- analysis/evaluation may be performed by using a known program that sets measurement/evaluation conditions, converts to an image file, and then analyzes brightness, saturation, reflectivity, etc. of the image/photo, but is not limited thereto.
- Example 1 330,000 0.5 0.34 6.9 7.802 0.7430
- Example 2 347,000 0.5 0.34 6.7 7.576 0.7215
- Example 3 320,000 0.5 0.34 7.2 8.141 0.7753
- Example 4 310,000 0.5 0.34 6.6 7.463 1.1056
- Example 5 302,000 0.5 0.33 6.4 7.182 0.6840
- Example 6 305,000 0.5 0.33 6.6 7.407 0.7054
- Example 7 310,000 0.5 0.33 6.7 7.519 0.7161
- Example 8 297,000 0.5 0.33 6.5 7.294 0.6947
- Example 9 270,000 0.5 0.33 6.3 7.070 0.6733
- Example 10 250,000 0.5 0.35 6.7 7.635 0.7272
- Example 11 240,000 0.5 0.35 6.5 7.407 0.7055
- Example 12 220,000 0.5 0.34 6.1 6.897 0.6569
- Example 13 235,000 0.5 0.34 6.5 7.350 0.7000
- Example 14 295,000 0.5 0.34 6.5 7.350 0.7000
- Example 14 295,000
- Examples 1 to 14 of the present invention have a high weight average molecular weight, and are excellent in yellowness, light transmittance and haze.
- all of Examples 1 to 14 of the present invention had folding performance parameters of 1.5 GPa or less, and elastic strain exponents (E') of 5.5 GPa or more, and no folding traces were generated even after the bending test.
- Comparative Example 1 it was impossible to manufacture a film due to gelation of the dicarbonyl-based compound.
- Comparative Example 2 the weight average molecular weight of the resin was low, and yellowness and haze were high, so it could be confirmed that visibility was low.
- Comparative Example 2 had a folding performance parameter of 1.5 GPa or less, but an elastic strain index (E') of less than 5.5 GPa, and slight folding traces occurred after the bending test.
- E' elastic strain index
- Comparative Example 3 the weight average molecular weight of the resin was large, but the yellowness and haze were remarkably high, and the light transmittance was remarkably low.
- Comparative Example 3 had a folding performance parameter of 1.5 GPa or less, but an elastic strain index (E') of less than 5.5 GPa, and slight folding traces occurred after the bending test.
- Comparative Example 4 had high yellowness and haze, low light transmittance, a folding performance parameter exceeding 1.5 GPa, and severe folding marks after a bending test. It can be seen that Comparative Example 5 has high yellowness and haze and low light transmittance, resulting in poor visibility.
- Comparative Example 5 had a folding performance parameter of 1.5 GPa or less, but an elastic strain index (E') of less than 5.5 GPa, and slight folding traces occurred after the bending test.
- Comparative Example 6 it can be seen that the weight average molecular weight of the resin was low, yellowness and haze were high, and light transmittance was low, resulting in poor visibility. In addition, Comparative Example 6 had a folding performance parameter of 1.5 GPa or less, but an elastic strain index (E') of less than 5.5 GPa, and slight folding traces occurred after the bending test.
- E' elastic strain index
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Abstract
Description
구분 | 제1 디아민계 화합물 및 첨가량 (몰%) |
제2 디아민계 화합물 및 첨가량 (몰%) |
디안하이드라이드계 화합물 및 첨가량 (몰%) |
디카르보닐계 화합물 및 첨가량 (몰%) |
필름 두께 (㎛) |
실시예 1 | TFDB: 75 | 3DDS: 25 | 6FDA: 2 | TPC: 98 | 50 |
실시예 2 | TFDB: 80 | 3DDS: 20 | 6FDA: 5 | TPC: 95 | 50 |
실시예 3 | TFDB: 75 | 3DDS: 25 | 6FDA: 5 | TPC: 95 | 50 |
실시예 4 | TFDB: 75 | 3DDS: 25 | 6FDA: 5 | BPDC: 95 | 80 |
실시예 5 | TFDB: 90 | 4DDS: 10 | 6FDA: 5 | TPC: 95 | 50 |
실시예 6 | TFDB: 85 | 4DDS: 15 | 6FDA: 5 | TPC: 95 | 50 |
실시예 7 | TFDB: 85 | 4DDS: 15 | 6FDA: 2 | TPC: 98 | 50 |
실시예 8 | TFDB: 90 | 4DDS: 10 | 6FDA: 10 | TPC: 90 | 50 |
실시예 9 | TFDB: 90 | 4DDS: 10 | 6FDA: 20 | TPC: 80 | 50 |
실시예 10 | TFDB: 75 | 3,3'-6F: 25 | 6FDA: 2 | TPC: 98 | 50 |
실시예 11 | TFDB: 90 | 4,4'-6F: 10 | 6FDA: 5 | TPC: 95 | 50 |
실시예 12 | TFDB: 50 | 3DDS: 50 | 6FDA: 20 | TPC: 80 | 50 |
실시예 13 | TFDB: 50 | 3DDS: 50 | 6FDA: 5 | TPC: 95 | 50 |
실시예 14 | TFDB: 95 | 4DDS: 5 | 6FDA: 5 | TPC: 95 | 50 |
비교예 1 | TFDB: 75 | pPDA: 25 | 6FDA: 2 | TPC: 98 | 제조 불가 |
비교예 2 | TFDB: 90 | 8FODA: 10 | 6FDA: 5 | TPC: 95 | 50 |
비교예 3 | TFDB: 100 | 없음 | 6FDA: 5 | TPC: 95 | 50 |
비교예 4 | TFDB: 90 | 4DDS: 10 | CBDA: 30, 6FDA: 5 | TPC: 65 | 80 |
비교예 5 | TFDB: 97 | 3DDS: 3 | 6FDA: 5 | TPC: 95 | 50 |
비교예 6 | TFDB: 45 | 3DDS: 55 | 6FDA: 5 | TPC: 95 | 50 |
구분 | 수지의 중량평균 분자량 | 곡률반경 (R) |
푸아송비 | 모듈러스 | 탄성변형 지수(E') (GPa) |
폴딩 성능 파라미터 (GPa) |
실시예 1 | 330,000 | 0.5 | 0.34 | 6.9 | 7.802 | 0.7430 |
실시예 2 | 347,000 | 0.5 | 0.34 | 6.7 | 7.576 | 0.7215 |
실시예 3 | 320,000 | 0.5 | 0.34 | 7.2 | 8.141 | 0.7753 |
실시예 4 | 310,000 | 0.5 | 0.34 | 6.6 | 7.463 | 1.1056 |
실시예 5 | 302,000 | 0.5 | 0.33 | 6.4 | 7.182 | 0.6840 |
실시예 6 | 305,000 | 0.5 | 0.33 | 6.6 | 7.407 | 0.7054 |
실시예 7 | 310,000 | 0.5 | 0.33 | 6.7 | 7.519 | 0.7161 |
실시예 8 | 297,000 | 0.5 | 0.33 | 6.5 | 7.294 | 0.6947 |
실시예 9 | 270,000 | 0.5 | 0.33 | 6.3 | 7.070 | 0.6733 |
실시예 10 | 250,000 | 0.5 | 0.35 | 6.7 | 7.635 | 0.7272 |
실시예 11 | 240,000 | 0.5 | 0.35 | 6.5 | 7.407 | 0.7055 |
실시예 12 | 220,000 | 0.5 | 0.34 | 6.1 | 6.897 | 0.6569 |
실시예 13 | 235,000 | 0.5 | 0.34 | 6.5 | 7.350 | 0.7000 |
실시예 14 | 295,000 | 0.5 | 0.33 | 6.2 | 6.958 | 0.6622 |
비교예 1 | 측정 불가 | 측정 불가 | 측정 불가 | 측정 불가 | 측정 불가 | 측정 불가 |
비교예 2 | 120,000 | 0.5 | 0.33 | 4.8 | 5.387 | 0.5130 |
비교예 3 | 440,000 | 0.5 | 0.32 | 4.9 | 5.459 | 0.5199 |
비교예 4 | 380,000 | 0.5 | 0.31 | 9.2 | 10.178 | 1.505 |
비교예 5 | 270,000 | 0.5 | 0.33 | 4.75 | 5.33 | 0.507 |
비교예 6 | 185,000 | 0.5 | 0.34 | 4.1 | 4.636 | 0.4412 |
구분 | 황색도(Y.I.) | 광투과도 (%) |
헤이즈 (%) |
폴딩 흔적 |
실시예 1 | 2.12 | 88.71 | 0.4 | X |
실시예 2 | 1.88 | 88.99 | 0.3 | X |
실시예 3 | 1.79 | 89.04 | 0.3 | X |
실시예 4 | 2.89 | 88.12 | 0.3 | X |
실시예 5 | 1.93 | 89.02 | 0.3 | X |
실시예 6 | 1.73 | 89.17 | 0.2 | X |
실시예 7 | 1.81 | 89.09 | 0.3 | X |
실시예 8 | 2.67 | 88.01 | 0.2 | X |
실시예 9 | 1.55 | 89.27 | 0.2 | X |
실시예 10 | 1.93 | 88.89 | 0.3 | X |
실시예 11 | 1.9 | 89.15 | 0.2 | X |
실시예 12 | 1.5 | 89.12 | 0.3 | X |
실시예 13 | 1.8 | 88.87 | 0.3 | X |
실시예 14 | 2.2 | 88.98 | 0.3 | X |
비교예 1 | 측정 불가 | 측정 불가 | 측정 불가 | 측정 불가 |
비교예 2 | 6.54 | 88.22 | 0.8 | △ |
비교예 3 | 27.9 | 58.4 | 49.6 | △ |
비교예 4 | 4.1 | 86.5 | 0.7 | O |
비교예 5 | 5.3 | 87 | 0.9 | △ |
비교예 6 | 6.7 | 85 | 1.2 | △ |
Claims (14)
- 고분자 수지를 포함하고,황색도가 3.0 이하이며,하기 식 1로 산출되는 폴딩 성능 파라미터가 1.5 GPa 이하인,광학 필름:[식 1]상기 식 1에서, R은 폴딩 시 폴딩 중심선에서의 광학 필름의 곡률 반경으로, 0.5 mm이고, d는 광학 필름의 두께로, 두께의 단위는 ㎛이며, E'는 하기 식 2로 산출되는 탄성변형 지수이다. 다만, 상기 식 1에서, 곡률 반경 및 두께는 단위를 제외하고, 숫자만 대입한다.[식 2]탄성변형 지수(E') = E/(1-v2)상기 식 2에서, E는 광학 필름의 모듈러스(modulus)이고, 모듈러스의 단위는 GPa이며, v는 광학 필름의 푸아송비(Poisson's ratio)이다.
- 제1항에 있어서,상기 식 2로 산출되는 탄성변형 지수(E')는 5.5 이상인,광학 필름
- 제1항에 있어서,상기 고분자 수지는 이미드 반복단위 및 아마이드 반복단위를 포함하는,광학 필름.
- 제3항에 있어서,상기 아마이드 반복단위는, 상기 이미드 반복단위 및 상기 아마이드 반복단위의 개수에 대하여 80% 이상의 비율로 포함되는,광학 필름.
- 제3항에 있어서,상기 이미드 반복단위는 제1 반복단위 및 제2 반복단위를 포함하는,광학 필름.
- 제3항에 있어서,상기 아마이드 반복단위는 제3 반복단위 및 제4 반복단위를 포함하는,광학 필름.
- 제5항에 있어서,상기 제1 반복단위는 제1 디아민계 화합물과 제1 디안하이드라이드계 화합물이 중합 반응한 이미드 반복단위이고,상기 제2 반복단위는 제2 디아민계 화합물과 제2 디안하이드라이드계 화합물이 중합 반응한 이미드 반복단위인,광학 필름.
- 제6항에 있어서,상기 제3 반복단위는 제1 디아민계 화합물과 제1 디카르보닐계 화합물이 중합 반응한 아마이드 반복단위이고,상기 제4 반복단위는 제2 디아민계 화합물과 제2 디카르보닐계 화합물이 중합 반응한 아마이드 반복단위인,광학 필름.
- 제7항 또는 제8항에 있어서,상기 제1 디아민계 화합물은, 2,2'-비스(트리플루오로메틸)벤지딘 (2,2'-Bis(trifluoromethyl)benzidine, TFDB)인,광학 필름.
- 제7항 또는 제8항에 있어서,상기 제2 디아민계 화합물은, 설포닐기(sulfonyl), 카르보닐기(Carbonyl), 메틸렌기(Methylene), 프로필렌기(Propylene) 및 할로겐원소(Halogen)로 구성된 군에서 선택된 1종 이상의 작용기를 포함하는 디아민계 화합물인,광학 필름.
- 제7항 또는 제8항에 있어서,상기 제2 디아민계 화합물은, 비스(3-아미노페닐)술폰 (Bis(3-aminophenyl)sulfone, 3DDS), 비스(4-아미노페닐)술폰 (Bis(4-aminophenyl)sulfone, 4DDS), 2,2-비스(3-아미노페닐)헥사플루오로프로판 (2,2-Bis(3-aminophenyl)hexafluoropropane, 3,3'-6F), 2,2-비스(4-아미노페닐)헥사플루오로프로판 (2,2-Bis(4-aminophenyl)hexafluoropropane, 4,4'-6F), 4,4'-메틸렌디아닐린 (4,4'-Methylenedianiline, MDA), 3,3'-디아미노벤조페논 (3,3'-Diaminobenzophenone), 4,4'-디아미노벤조페논 (4,4'-Diaminobenzophenone) 및 테트라클로라이드벤지딘 (Tetrachloridebenzidine, CIBZ)로 이루어진 군에서 선택된 적어도 어느 하나를 포함하는,광학 필름.
- 제7항 또는 제8항에 있어서,중합 반응한 제1 디아민계 화합물과 제2 디아민계 화합물의 몰 비율은 95:5 내지 50:50인,광학 필름.
- 제1항에 있어서,상기 고분자 수지는, 200,000 내지 500,000의 중량평균 분자량(weight-average molecular weight, Mw)을 가지는,광학 필름.
- 표시패널; 및상기 표시패널 상에 배치된, 제1항 내지 제13항 중 어느 한 항의 광학 필름;을 포함하는, 표시장치.
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JP2023575504A JP2024529230A (ja) | 2021-07-14 | 2021-12-24 | 折り畳み性能に優れた光学フィルム及びこれを含む表示装置 |
EP21950296.0A EP4324870A1 (en) | 2021-07-14 | 2021-12-24 | Optical film having excellent folding performance and display device comprising same |
CN202180100358.XA CN117616072A (zh) | 2021-07-14 | 2021-12-24 | 具有优异的折叠性能的光学膜和包括该光学膜的显示装置 |
US18/560,376 US20240255676A1 (en) | 2021-07-14 | 2021-12-24 | Optical film having excellent folding performance and display device comprising same |
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KR1020210186219A KR102699705B1 (ko) | 2021-07-14 | 2021-12-23 | 폴딩 성능이 우수한 광학 필름 및 이를 포함하는 표시장치 |
KR10-2021-0186219 | 2021-12-23 |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20170023715A1 (en) * | 2015-07-22 | 2017-01-26 | Samsung Electronics Co., Ltd. | Optical film, manufacturing method thereof, and display device |
KR20180112671A (ko) * | 2017-04-04 | 2018-10-12 | 에스케이씨 주식회사 | 무색 투명한 폴리아마이드-이미드 필름 및 이의 제조방법 |
US20200147943A1 (en) * | 2018-11-13 | 2020-05-14 | Dupont Electronics, Inc. | Multilayer Polymer Film |
KR20210020395A (ko) * | 2019-08-14 | 2021-02-24 | 에스케이씨 주식회사 | 폴리아마이드-이미드 필름, 이의 제조방법, 및 이를 포함하는 커버 윈도우 및 디스플레이 장치 |
JP2021055096A (ja) * | 2019-09-30 | 2021-04-08 | エスケー イノベーション カンパニー リミテッドSk Innovation Co.,Ltd. | ポリイミド系フィルムおよびこれを含むフレキシブルディスプレイパネル |
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- 2021-12-24 WO PCT/KR2021/019823 patent/WO2023286954A1/ko active Application Filing
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- 2021-12-24 TW TW110148690A patent/TW202302717A/zh unknown
- 2021-12-24 US US18/560,376 patent/US20240255676A1/en active Pending
- 2021-12-24 JP JP2023575504A patent/JP2024529230A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170023715A1 (en) * | 2015-07-22 | 2017-01-26 | Samsung Electronics Co., Ltd. | Optical film, manufacturing method thereof, and display device |
KR20180112671A (ko) * | 2017-04-04 | 2018-10-12 | 에스케이씨 주식회사 | 무색 투명한 폴리아마이드-이미드 필름 및 이의 제조방법 |
US20200147943A1 (en) * | 2018-11-13 | 2020-05-14 | Dupont Electronics, Inc. | Multilayer Polymer Film |
KR20210020395A (ko) * | 2019-08-14 | 2021-02-24 | 에스케이씨 주식회사 | 폴리아마이드-이미드 필름, 이의 제조방법, 및 이를 포함하는 커버 윈도우 및 디스플레이 장치 |
JP2021055096A (ja) * | 2019-09-30 | 2021-04-08 | エスケー イノベーション カンパニー リミテッドSk Innovation Co.,Ltd. | ポリイミド系フィルムおよびこれを含むフレキシブルディスプレイパネル |
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US20240255676A1 (en) | 2024-08-01 |
JP2024529230A (ja) | 2024-08-06 |
TW202302717A (zh) | 2023-01-16 |
TW202334285A (zh) | 2023-09-01 |
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