WO2015076566A1 - 플라스틱 필름 - Google Patents
플라스틱 필름 Download PDFInfo
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- WO2015076566A1 WO2015076566A1 PCT/KR2014/011144 KR2014011144W WO2015076566A1 WO 2015076566 A1 WO2015076566 A1 WO 2015076566A1 KR 2014011144 W KR2014011144 W KR 2014011144W WO 2015076566 A1 WO2015076566 A1 WO 2015076566A1
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- Prior art keywords
- coating layer
- plastic film
- coating
- layer
- elastic modulus
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Classifications
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/584—Scratch resistance
-
- 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
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/22—Thermoplastic resins
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- 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
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/08—Homopolymers or copolymers of acrylic acid esters
Definitions
- the present invention relates to a plastic film. More specifically, it relates to a multilayer plastic film exhibiting high hardness and excellent properties.
- a method of increasing the thickness of the hard coating layer may be considered.
- the surface hardness In order to secure the surface hardness to the extent that may be substituted for the glass, it is necessary to implement a uniform thickness of the hard coating layer.
- the surface hardness can be increased to increase the thickness of the hard coating layer, it is not easy to apply practically because the shrinkage or curl of the hard coating layer increases the wrinkles and curls, and the coating layer easily becomes cracked. .
- Korean Unexamined Patent Publication No. 2010-0041992 is UV curable without the monomer
- a coating composition using a binder resin containing a polyurethane acrylate-based oligomer is not strong enough to replace the glass panel of the display with a pencil hardness of 3H.
- the present invention provides a plastic film having high hardness and excellent properties.
- the plastic film includes at least one of three coating layers positioned between the supporting substrate and the first coating layer, and a fourth coating layer positioned between the supporting substrate and the second coating layer.
- plastic film of the present invention high hardness, layer resistance, scratch resistance, and high transparency to replace glass in the touch panel of a mobile communication terminal, a smartphone or a tablet PC, and a cover substrate or an element substrate of various displayscan be used as
- FIG. 1 is a view showing a plastic film according to an embodiment of the present invention.
- 2 is a view showing a plastic film according to an embodiment of the present invention.
- Figure 3 is a view showing the plastic film according to one embodiment of the invention.
- Elastic modulus formed on one surface of the supporting substrate and below 1500 MPa a first coating layer having a modulus
- each component is “on” or each component
- each component When referred to as being “formed on” it means that each component is formed directly on top of each component, or that other components may be additionally formed between each layer, the object, the substrate.
- the support substrate A first coating layer formed on one surface of the support substrate and having an elastic modulus of 1500 MPa or less; A second coating layer formed on the other surface of the supporting substrate and having an elastic modulus of 2000 MPa or more; And a third coating layer positioned between the support substrate and the first coating layer, and a fourth coating layer positioned between the support substrate and the second coating layer.
- the supporting substrate on which the first to fourth coating layers are formed may be used without particular limitation in the manufacturing method or material of the supporting substrate, such as a stretched film or a non-stretched film, as long as it is a transparent plastic resin substrate. Can be.
- the support The substrate may be, for example, a polyester such as polyethylene terephthalate (PET), a polyethylene such as ethylene vinyl acetate (EVA), a cyclic olefin polymer (COP) ), Cyclic olefin copolymers (cyclic olefin copolymers), polyacrylates (AC), polycarbonates (PCs), polyethylenes (PEs), polymethylmethacrylates (polymethylmethacrylates, PMMA) ), Polyetheretherketon (PEEK), polyethylenenaphthalate (PEN), polyetherimide (PEI), polyimide (PI), triacetylcellulose (TAC), MMA (methyl methacrylate), or a film containing a fluorine resin or the like.
- the support substrate may be a single layer or a multilayer structure including two or more substrates made of the same or different materials as necessary, but is not particularly limited.
- the supporting substrate is a multi-layered structure of polyethylene terephthalate (PET), the structure of two or more layers formed by co-extrusion of polymethyl methacrylate (PMMA) / polycarbonate (PC) It can be a substrate.
- PET polyethylene terephthalate
- PMMA polymethyl methacrylate
- PC polycarbonate
- the support substrate may be a substrate including a copolymer of polymethyl methacrylate (PMMA) and polycarbonate (PC).
- PMMA polymethyl methacrylate
- PC polycarbonate
- the thickness of the supporting substrate is not particularly limited, but a substrate having a thickness of about 30 to about 1,200, or about 50 to about 800 may be used.
- the plastic film of the present invention includes first and second coating layers formed on both sides of the support substrate.
- the first and second coating layers are in direct contact with one surface of the support substrate, or another structure such as a layer or film is added between the first coating layer and the support substrate or between the second coating layer and the support substrate. It may be formed in a form containing.
- the first coating layer has an elastic modulus of 1500 MPa or less
- the second coating layer has 2000 MPa or more. It is characterized by having an elastic modulus.
- elastic modulus means a value measured according to ASTM D882.
- the plastic film of the present invention has a form in which at least two layers each having a different modulus of elasticity are laminated on both sides of the supporting substrate, and the modulus of elasticity of the second coating layer is at least 500 MPa greater than that of the first coating layer.
- the second coating layer having a large modulus of elasticity of 2000 MPa or more may exhibit high physical strength such as high hardness
- the first coating layer having a low modulus of elasticity of 1500 MPa or less may exhibit layer resistance and flex resistance. Therefore, as described above, the plastic film of the present invention includes two coating layers each having a different modulus of elasticity laminated on both sides of the support substrate, thereby having a high physical strength to replace glass, but also having curl or crack. There is little problem of and it can show the outstanding workability.
- the elastic modulus of the first coating layer is about 1500 MPa or less, for example, about 300 to about 1500 MPa, or about 300 to about 1200 MPa, or about 300 to about 1000 MPa
- the modulus of elasticity of the second coating layer may be about 2000 MPa or more, for example about 2000 to about 3500 MPa, or about 2000 to about 3000 MPa, or about 2000 to about 2800 MPa.
- the difference between the elastic modulus 1 1 and the crab 2 is about 500 MPa or more, for example, about 500 to about 3000 MPa, or about 500 to about 2500 MPa, or about 500 to About 2000 MPa.
- the elastic modulus and the difference between the first and the second coating layer is within the above range, it has a high physical strength to replace the glass, but there is little problem of curl or crack, and thus high hardness and high layer resistance can be exhibited. have.
- the plastic film of the present invention is the above.
- the plastic film of the present invention includes a first, second, and third coating layer, or is a film in which three layers including the first, second, and fourth coating layers are laminated, or the first to second layers. It may be a multilayer plastic film in which four layers are stacked in a form including all four coating layers.
- the modulus of elasticity of the third and fourth coating layers may be determined as a relative value with respect to the modulus of elasticity of the first and second coating layers, respectively.
- the elastic modulus of the third coating layer may have a value equal to or greater than the elastic modulus of the first coating layer.
- the elastic modulus of the fourth coating layer may have a value equal to or smaller than the elastic modulus of the second coating layer.
- the difference in elastic modulus of the first and third coating layers is not particularly limited as long as it is 0 MPa or more, and may be, for example, about 0 to about 2000 MPa, or about 0 to about 1000 MPa, or about 0 to about 500 MPa.
- the difference in elastic modulus of the second and fourth coating layers is also not particularly limited as long as it is 0 MPa or more, for example, about 0 to about 2000 MPa, or about 0 to about 1000 MPa, or about 0 to about 500 MPa. Can be.
- the difference in the elastic modulus of the first and third coating layer is 0 MPa or more, and at the same time the third coating layer may have an elastic modulus of about 2000 MPa or less. More specifically, the modulus of elasticity of the third coating layer may be about 2000 MPa or less, for example, about 300 to about 2000 MPa, or about 300 to about 1500 MPa, or about 300 to about 1000 MPa.
- the difference in the elastic modulus of the second and fourth coating layer is 0 MPa or more, and at the same time the fourth coating layer may have an elastic modulus of about 1500 MPa or more. More specifically, the modulus of elasticity of the fourth coating layer may be about 1500 MPa or more, for example, about 1500 to about 3500 MPa, or about 1500 to about 3000 MPa, or about 1500 to about 2800 MPa.
- 1 to 3 are views each showing a plastic film according to an embodiment of the present invention.
- the plastic film of the present invention includes a support substrate 50, a first coating layer 10, a second coating layer 20, and a crab 3 coating layer 30.
- the first coating layer 10 and the second coating layer 20 are formed on both sides of the support substrate 50, respectively, and the third coating layer 30 between the first coating layer 10 and the support substrate 50. Laminated in the form containing a.
- the plastic film of the present invention is a support substrate 50, the first A coating layer 10, a crab 2 coating layer 20, and a fourth coating layer 40.
- the first coating layer 10 and the second coating layer 20 are formed on both sides of the support substrate 50, respectively, and the fourth coating layer 40 between the second coating layer 20 and the support substrate 50. Laminated in the form containing a.
- the plastic film of the present invention includes a support base 5 (), a first coating layer 10, a second coating layer 20, a third coating layer 30, and a fourth coating layer 40.
- the first coating layer 10, and the crab 2 coating layer 20 is formed on both sides of the support substrate 50, respectively, between the coating layer 10, and the support substrate 50, the coating layer 3 ( 30) is laminated
- the components constituting the first to fourth coating layers are not particularly limited as long as they satisfy the conditions of the above-described elastic modulus.
- the first to fourth coating layers may be the same independently or Differently, it may include a photocurable crosslinked copolymer with a photocurable elastomer and a 3 to 6 functional acrylate monomer.
- the photocurable crosslinked copolymer may be a crosslinked copolymer of a 3 to 6 functional acrylate monomer and a photocurable elastomer.
- the acrylate-based means both acrylates and derivatives in which substituents are introduced into acrylates or methacrylates.
- the photocurable elastomer means a polymer material that exhibits elasticity and includes a functional group capable of crosslinking polymerization by ultraviolet irradiation.
- the photocurable elastomer is at least about 15%, for example from about 15 to about 200%, or from about 20 to about 200%, or from about 20 to about as measured by ASTM D638. It can have an elongation of 150%.
- a photo-curable elastomeric polymer having a elongation at break in the range as described above it can form a coating layer that satisfies all of the high hardness and high impact resistance.
- the photocurable elastomer is cross-polymerized with the 3 to 6 functional acrylate monomer to form a first to fourth coating layer after curing, the content of the Therefore, it is possible to give a suitable flexibility and impact resistance to the first to fourth coating layer.
- the photocurable elastomer may be a polymer or oligomer having a weight average molecular weight in the range of about 1,000 to about 600,000 g / mol, or about 10,000 to about 600,000 g / mol.
- the photocurable elastomer may be, for example, at least one member selected from the group consisting of polycaprolactone, urethane acrylate polymer, and polyrotaxane.
- polycaprolactone is formed by ring-opening polymerization of caprolactone and has excellent physical properties such as flexibility, layer resistance, and durability.
- the urethane-acrylate polymer has excellent elasticity and durability, including urethane bonds.
- the polyrotaxane refers to a compound in which a dumbbell shaped molecule and a cyclic compound are structurally fitted.
- the dumbbell shaped molecule includes a constant linear molecule and a blocking group disposed at both ends of the linear molecule, the linear molecule penetrates the interior of the cyclic compound, and the cyclic compound can move along the linear molecule. And the departure is prevented by the blocker.
- a cyclic compound in which a lactone compound having a (meth) acrylate compound introduced therein is bound; Linear molecules penetrating the cyclic compound; And a rotasein compound disposed at both ends of the linear molecule and including a blocking group to prevent the cyclic compound from being separated.
- the cyclic compound is located as long as it can be used without any other restriction having a size of it, about several rice through or around the linear molecule and another polymer or compound capable of banung hydroxyl group, an amino group, a carboxyl group, tieul group or Functional groups, such as an aldehyde group, may also be included.
- Specific examples of such cyclic compounds include (X-cyclodextrin, ⁇ -cyclotextrin, ⁇ -cyclotextrin or a combination thereof.
- the linear molecule has a linear shape when it has a certain molecular weight or more
- the compound can be used without great limitation, but a polyalkylene compound or a polylactone compound can be used.
- a polyoxyalkylene compound containing a oxyalkylene repeating unit having 1 to 8 carbon atoms or a polylactone compound having a lactone repeating unit having 3 to 10 carbon atoms may be used.
- the blocking group may be appropriately adjusted according to the properties of the rotacein compound to be prepared, for example, one selected from the group consisting of dinitrophenyl group, cyclotextrin group, adamantane group, trityl group, fluorescein group and pyrene group or Two or more kinds can be used.
- the first to fourth coating layers include the photocurable elastomer and photocurable to impart high hardness and flexibility to the first to fourth coating layers. It can prevent and ensure excellent layer resistance.
- the 3 to 6 functional acrylate monomers include, for example, trimethyl propane triacrylate (TMPTA), trimethyl propane ethoxy triacrylate (TMPEOTA), glycerin propoxylated triacrylate (GPTA), pentaerythritol Tetraacrylate (PET A), or dipentaerythroxy to nuxaacrylate (DPHA), etc. are mentioned.
- TMPTA trimethyl propane triacrylate
- TMPEOTA trimethyl propane ethoxy triacrylate
- GPTA glycerin propoxylated triacrylate
- PET A pentaerythritol Tetraacrylate
- DPHA dipentaerythroxy to nuxaacrylate
- the photocurable crosslinked copolymer may be a crosslinked copolymer in which the photocurable elastomer and a 3 to 6 functional acrylate monomer are crosslinked.
- the photocurable crosslinked copolymer is 5 to 20 parts by weight of the photocurable elastomer and the 3 to 6 functionalities when the total weight of the photocurable crosslinked copolymer is 100 parts by weight 80 to 95 parts by weight of the acrylate monomer, or 20 to 40 parts by weight of the photocurable elastomer and 60 to 80 parts by weight of the 3 to 6 functional acrylate monomer, or 40 to 40 of the photocurable elastomer 80 parts by weight and 20 to 60 parts by weight of the 3 to 6 functional acrylate monomer may be a copolymer crosslinked.
- the first to the fourth coating layer by adjusting the content of the high-elastic photocurable elastomer, it is possible to achieve a good physical property, the combination of high impact resistance and hardness.
- the first coating may be a relatively photocurable elastomer.
- the second coating layer may exhibit a high hardness, including a relatively low content of the photocurable elastomer.
- the first coating layer includes a copolymer in which 40 to 80 parts by weight of the photocurable elastomer and 20 to 60 parts by weight of the 3 to 6 functional acrylate monomer are crosslinked and polymerized.
- the second coating layer is 5 to 20 parts by weight of the photocurable elastomer and the 3 to 6 functional acrylate-based. 80 to 95 parts by weight of the monomer may comprise a cross-polymerized copolymer.
- the coating layer may include a co-polymer in which 20 to 40 parts by weight of the photocurable elastomer and 60 to 80 parts by weight of the 3 to 6 functional acrylate monomer are cross-polymerized.
- the fourth coating layer may include a copolymer of 20 to 40 parts by weight of the photocurable elastomer and 60 to 80 parts by weight of the 3 to 6 functional acrylate monomer.
- the present invention is not limited thereto. If the elastic modulus of the first to fourth coating layers satisfies the above-mentioned range, the material and content included therein are not limited.
- the photocurable crosslinked copolymer in addition to the 3 to 6 functional acrylate monomer and the photocurable crosslinked copolymer, 1 to 2 functional acrylate monomer is further cross-polymerized It may be a crosslinked copolymer.
- the 1 to 2 functional acrylate monomers are, for example, hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), nucleic acid didi diacrylate (HDDA), or tripropylene glycol diacrylate ( TPGDA), ethylene glycol diacrylate (EGDA), and the like.
- the 1 to 2 functional acrylate monomers may also be used alone or in combination with each other.
- each of the first to fourth coating layers may independently include the same or different inorganic fine particles dispersed in the photocurable cross-linked polymer.
- the inorganic fine particles of the inorganic particles having a particle size of nano-scale for example, about 100 nm or less, or about 10 to about 100 nm, Or about 10 to about 50 nm of nanoparticles.
- the inorganic fine particles for example, silica fine particles, aluminum oxide particles, titanium oxide particles, zinc oxide particles, or the like can be used.
- the hardness of the plastic film can be further improved.
- the second coating layer which is the outermost layer, contains inorganic fine particles for improving surface hardness.
- the first to fourth coating layers include inorganic fine particles
- about 40 to about 90 parts by weight of the photocurable crosslinked copolymer with respect to 100 parts by weight of the first to fourth coating layers and about 10 to about 60 parts by weight of the inorganic fine particles, or about 50 to about 80 parts by weight of the photocurable crosslinked copolymer and about 20 to about 50 parts by weight of the inorganic fine particles.
- the first to fourth coating layers are at least 50, for example about 50 to about 300 um, or about 50 to about 200 / m, or about 50 to about 150 IM, or about 70 To about 150.
- the thicknesses of the first to fourth coating layers may be the same or different from each other independently.
- the thickness of the coating layer laminated on both sides of the supporting substrate with respect to the supporting substrate may be the same range, regardless of the number of laminated layers. More preferably, the sum of the thicknesses of the coating layers laminated on both sides of the support substrate may be within about 50% or within about 30%.
- the plastic film of the present invention is a plastic film composed of three layers including the first and third coating layers on one side and the second coating layer on the other side, the sum of the thicknesses of the first and third coating layers About 50 to about 300 an, or about 50 to about 200, or about 50 to about 150 ⁇ , or about 70 to about 150 zm, wherein the thickness of the second coating layer is about 50 to about 300 / im, or about 50 To about 200, or about 50 to about 150 m, or about 70 to about 150.
- the ratio of the thicknesses of the first coating layer and the third coating layer may be 99: 1 to 5: 5, or about 7: 3 to about 5: 5.
- the polar film of the present invention includes a first coating layer on one surface, the other
- the sum of the thicknesses of the second and fourth coating layers is about 50 to about 300 urn, or about 50 to about 200, or about 50 to About 150, or about 70 to about 150
- the thickness of the first coating layer is about 50 to about 300 ⁇ ⁇ ⁇ , or about 50 to about 200 ⁇ m, or about 50 to about 150 urn, or about 70 to about 150 days have.
- the ratio of the thickness of the second coating layer and the fourth coating layer may be 99: 1 to 5: 5, or about 7: 3 to about 5: 5.
- the thickness of the second and fourth coating layers is about 50 To about 300 m, or about 50 to about 200 IM, or about 50 to about 150 ⁇ or about 70 to about 150.
- the ratio of the thickness of the first coating layer and the third coating layer is 99: 1 to 5: 5, or about 7: 3 to about 5: 5
- the ratio of the thickness of the second coating layer and the fourth coating layer is 99: 1 to 5: 5, or about 7: 3 to about 5: 5.
- the first to fourth coating layers further include additives commonly used in the technical field to which the present invention belongs, such as surfactants, anti-yellowing agents, leveling agents, and antifouling agents. can do.
- the content thereof may be variously adjusted within a range that does not lower the physical properties of the plastic film of the present invention, and is not particularly limited. For example, about 0.1 to about 10 weight parts based on 100 parts by weight of the photocurable crosslinked copolymer. It can be included as a wealth.
- the first to fourth coating layers may include a surfactant as an additive, and the surfactant may be a 1 to 2 functional fluorine acrylate, a fluorine surfactant or a silicone surfactant. You can be the best.
- the surfactant may be included in the form of being dispersed or crosslinked in the crosslinked copolymer.
- the additive may include a yellowing inhibitor, and the yellowing inhibitor may include a benzophenone compound or a benzotriazole compound.
- the first to fourth coating layers are the same or different from each other independently, the 3 to 6 functional acrylate monomers, photocurable elastomers, photoinitiators, and optionally 1 to 2 functional acrylate monomers, inorganic fine particles ,
- the first and fourth coating compositions including an organic solvent and an additive may be applied and then photocured.
- photoinitiator examples include 1-hydroxy-cyclonucleosil-phenyl ketone and 2'hydroxy-2-methyl-1-phenyl-1-propane; 2-hydroxy-1- [4- (2-hydroxy Phenyl] -2-methyl-1-propane is methyl banjoyl formate, ⁇ , ⁇ -dimethoxy- ⁇ -phenylacetophenone, 2-benzoyl-2- (dimethylamino) -1- [4- ( 4-morpholinyl) phenyl] -1-butanone, 2-methyl-1- [4- (methylthio) phenyl] -2- (4-morpholinyl) -1-propanone diphenyl (2, 4,6 ⁇ trimethylbenzoyl) -phosphine oxide, or bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, but is not limited thereto.
- Irgacure 500 Irgacure 651, Irgacure 369, Irgacure 907, Darocur 1173, Darocur MBF, Irgacure 819, Darocur TPO, Irgacure 907, Esacure KIP 100F, and the like. Can be used in combination.
- organic solvent examples include methane, an alcoholic solvent such as ethanol, isopropyl alcohol and butanol, 2-methoxyethane, 2-ethoxyethane, an alkoxy alcohol solvent such as 1 ⁇ methoxy-2-propanol, and acetone.
- Ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, methyl propyl ketone, cyclonucleanone, propylene glycol monopropyl ether, propylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl an ether, di-ethylene, call monomethyl ether, diethyl glycol monoethyl ether, diethylene glycol mono ethyl ether, diethyl glycol monobutyl ether, diethylene glycol-2-ethyl haeksil ether and ether-based solvents such as benzene, Aromatic solvents, such as luene and xylene, can be used alone or in combination.
- the organic solvent with respect to a solid content including the 3 to 6 functional acrylate monomer, a photocurable elastomer, a photoinitiator, and other additives the solid content: of the organic solvent
- the weight ratio may be about 70:30 to about 99: 1.
- the plastic film of the present invention is a plastic resin film, an adhesive film, a release film, a conductive film, a conductive layer, a coating layer, a cured resin layer, a non-conductive film, a metal mesh layer on at least one coating layer of the first coating layer or the second coating layer. Or more than one layer, film, film, or the like, such as a patterned metal layer.
- the layer, film, film or the like may be in any form of a single layer, a double layer or a laminate.
- the layer, film, or film may be laminated on the coating layer by a method such as laminating a freestanding film using an adhesive or an adhesive film, or by coating, vapor deposition, sputtering, or the like. It is not limited to this.
- the other layer, film, or film may be formed in direct contact with the first coating layer in order to protect the other layer, film, or film from external impact and to ensure scratch resistance by friction.
- the plastic film of the present invention is a multilayer plastic film in which a coating layer having a different elastic modulus range is laminated, and a plurality of coating layers effectively absorb or offset an impact from the outside while exhibiting high transparency and high hardness. It can exhibit high layer resistance. Accordingly, the present invention can be widely used for replacing glass in a touch panel of a mobile communication terminal, a smart phone or a tablet PC, and a cover substrate or an element substrate of various displays.
- the plastic film according to the present invention can be formed by applying the above-described first to fourth coating compositions on the supporting substrate or another coating layer and photocuring the same. That is, according to the laminated structure, the plastic film of the present invention by applying a composition corresponding to the coating layer in direct contact on the support substrate and photocured, and then by coating and curing the coating composition on the cured coating layer again three to It is possible to form a plastic film comprising four coating layers.
- the method of applying the coating composition is not particularly limited as long as it can be used in the technical field to which the present technology belongs, for example, bar coating method, knife coating method, roll coating method, blade coating method, die coating method, micro A gravure coating method, a comma coating method, a slot die coating method, a lip coating method, or a solution casting method may be used.
- the radiation amount of ultraviolet light when the photo-curing by irradiating UV light on the coating composition may be from about 20 to about 600 mJ / cm 2, or from about 50 to about 500 mJ / cm.
- the ultraviolet light source is not particularly limited as long as it can be used in the art to which the present technology belongs, and for example, a high pressure mercury lamp, a metal halide lamp, a black light fluorescent lamp, or the like can be used. Irradiation for about 30 seconds to about 15 minutes, or about 1 minute to about 10 minutes with the above irradiation amount may be performed to photocuring.
- a plastic film for use as a cover of a mobile communication terminal or a tablet PC it is important to improve the hardness and impact resistance of the plastic film to a level that can replace glass. Even if the coating layer according to the present invention is formed to a high thickness on the substrate, there is little curl or cracks, and a plastic film having high transparency and layer resistance can be obtained.
- the plastic film of the present invention may have excellent hardness and impact resistance enough to replace glass.
- cracks may not occur when 22 g of iron balls are repeatedly dropped freely at a height of 60 cm for 10 times.
- the second coating layer may have a pencil hardness of 7H or more, or 8H or more, or 9H or more at a load of 1 kg.
- the second coating layer in the plastic film of the present invention when the steel wool (steel wool) # 0000 in the friction tester may be scratched less than two when reciprocating 400 times with a load of 500 g.
- the plastic film of the present invention may have a light transmittance of about 91.0% or more, or about 92.0% or more, and a haze of about 1.0% or less, or about 0.5% or less, or about 0.4% or less.
- the plastic film of the present invention the initial color b value (CIE 1976 L * a * b * color B *) by space may be about 1.0 or less.
- the difference between the initial color b value and the color b value after 72 hours or more exposure to the UV lamp in the UVB wavelength region may be about 0.5 or less, or about 0.4 or less.
- the plastic film of the present invention when exposed to more than 70 hours at a silver degree of 50 ° C or more and more than 80% humidity and placed in the plane, the maximum value of the distance from each corner or one side plane of the plastic film is About 1.0 mm or less, or about 0.6 mm or less, or about 0.3 mm or less. More specifically, the maximum value of the distance of each corner or one side of the plastic film spaced apart from the plane when placed in a plane after exposure for 70 to 100 hours at a temperature of 50 to 90 ° C and a humidity of 80 to 90% About 1.0 mm or less, or about 0.6 mm or less, or about 0.3 mm or less.
- the plastic film of the present invention exhibits high hardness, impact resistance, scratch resistance, high transparency, durability, light resistance, high transmittance, and the like, and thus may be usefully used in various fields.
- the plastic film of the present invention can be utilized in various fields.
- it can be used for a touch panel of a mobile communication terminal, a smart phone or a tablet PC, and a cover engine or an element substrate of various displays.
- the weight average molecular weight of the obtained polyrotasein was 600,000 g / mol, and elongation measured by ASTM D638 was 20%.
- Example 1 The weight average molecular weight of the obtained polyrotasein was 600,000 g / mol, and elongation measured by ASTM D638 was 20%.
- TMPTA trimethylolpropane triacrylate
- polyrotasein of Preparation Example 1 6 g
- photoinitiator trade name: Darocur TPO
- benzotriazole-based yellowing inhibitor brand name: Tinuvin 400
- fluorine-based interface 0.05 g of the active agent (trade name: FC4430) and 1 g of methyl ethyl ketone were mixed to prepare a first coating composition.
- Silica-dipentaerythroxy nucleated acrylate (DPHA) complex 9 g (3.6 g silica, DPHA 5.4 g), polyrotase of Preparation Example 1 1 g of phosphorus, 0.2 g of photoinitiated crab (trade name: Darocur TPO), 0.1 g of benzotriazole-based yellowing inhibitor (trade name: Tinuvin 400), 0.05 g of fluorine-based surfactant (trade name: FC4430), 1 g of methyl ethyl ketone 2 coating compositions were prepared.
- DPHA silica
- FC4430 fluorine-based surfactant
- TMPTA trimethyl propane triacrylate
- polyrotasein of Preparation Example 1 3 g of polyrotasein of Preparation Example 1
- 0.2 g of a photoinitiator trade name: Darocur TPO
- 0.1 g of a benzotriazole-based yellowing inhibitor trade name: Tinuvin 400
- fluorine 0.05 g of surfactant 1 trade name: FC4430
- 1 g of methyl ethyl ketone were mixed to prepare a third coating composition.
- the third coating composition was applied on a PET support substrate having a thickness of 15 cm X 20 cm, 188.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a third coating layer having a thickness of 50.
- the first coating composition was applied on the third coating layer.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a first coating layer having a thickness of 50 / tn.
- the second coating composition was applied to the back side of the support substrate.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a second coating layer having a thickness of 100.
- the first and second coating compositions were prepared in the same manner as in Example 1.
- the particle diameter is 20-30nm nano silica is about 40 wt 0/0 dispersed silica-dipentaerythritol hex the EPO Li acrylate (DPHA) 8 complex g (silica 3.2 g, DPHA 4.8 g), Polyrotasein 2g of Production Example 1, photoinitiator (trade name: Darocur TPO) 0.2 g, benzotriazole-based yellowing inhibitor (brand name: Tinuvin 400) 0.1 g, fluorine-based surfactant (brand name: FC4430) 0.05 g, methyl ethyl ketone 1 g was mixed to prepare a fourth coating composition.
- DPHA dispersed silica-dipentaerythritol hex the EPO Li acrylate
- DPHA dispersed silica-dipentaerythritol hex the EPO Li acrylate
- DPHA dispersed silica-dipentaerythritol
- the first coating composition was applied on a PET support substrate having a thickness of 15 cm X 20 cm, 188 / m.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a first coating layer having a thickness of 100.
- the fourth coating composition was applied to the back side of the support substrate.
- photocuring was performed by irradiating ultraviolet rays having a wavelength of 28 to 350 nm using a black light fluorescent lamp to form a fourth coating layer having a thickness of 50.
- the second coating composition was applied onto the fourth coating layer.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a second coating layer having a thickness of 50.
- the first, second and third coating compositions were prepared in the same manner as in Example 1.
- the particle diameter is 20-30nm nano silica is about 40 wt 0/0 dispersion of silica-to-dipentadecyloxybenzamidine EPO processed as hexaacrylate (DPHA) 8 complex g (silica 3.2 g, DPHA 4.8 g),
- Example 1 Preparation of poly Interceptor 2 g of phosphorus, 0.2 g of a photoinitiator (brand name: Darocur TPO), 0.1 g of a benzotriazole type yellowing inhibitor (brand name: Tinuvin 400), 0.05 g of a bloso type surfactant (brand name: FC4430), and 1 g of methyl ethyl ketone were mixed, 4 coating compositions were prepared.
- the third coating composition was applied on a PET support substrate having a thickness of 15 cm X 20 cm, 188 m.
- photocuring was performed by irradiating a wavelength of 280-350 nm and ultraviolet rays using a black light fluorescent lamp to form a third coating layer having a thickness of 50.
- the first coating composition was applied on the third coating layer.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a first coating layer having a thickness of 50.
- the fourth coating composition was applied to the back side of the support substrate. Next, photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a fourth coating layer having a thickness of 50. The second coating composition was applied onto the fourth coating layer. Next, photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a second coating layer having a thickness of 50. Due Diligence 4
- TFTA trimethylolpropane triacrylate
- UA340P Shinnakamura Chemical
- UA340P Shinnakamura Chemical
- weight average molecular weight 13,000 g / mol elongation at 150% by ASTM D638
- Darocur TPO 0.2 g
- banjo triazole yellowing inhibitor trade name: Tinuvhi 400
- FC4430 fluorine-based surfactant
- 0.05 g methyl ethyl ketone lg was mixed to prepare a first coating composition.
- the particle diameter is 20-30nm nano silica is about 40 wt 0/0 dispersed silica-hex the dipentaerythritol EPO Li acrylate (DPHA) complex 9 g (silica 3.6 g, DPHA 5.4 g), urethane acrylate-based polymer (UA340P ) 1 g, photoinitiating crab (trade name: Darocur TPO) 0.2 g, benzotriazole-based yellowing inhibitor (trade name: Tinuvin 400) 0.1 g, fluorine-based surfactant (trade name: FC4430) 0.05 g, methyl ethyl ketone 1 g A second coating composition was prepared.
- DPHA dipentaerythritol EPO Li acrylate
- U340P urethane acrylate-based polymer
- U340P photoinitiating crab
- benzotriazole-based yellowing inhibitor trade name: Tinuvin 400
- fluorine-based surfactant
- TMPTA trimethylolpropane triacrylate
- U 34 0P 3 g of urethane acrylate polymer
- 0.2 g of photoinitiator trade name: Darocur TPO
- 0.1 g of benzotriazole yellowing inhibitor trade name: Tinuvin 400
- 0.05 g of a fluorine-based surfactant trade name: FC4 4 30
- FC4 4 30 methyl ethyl ketone lg
- Dispersed Silica-Dpentaerythri nucleoacrylate (DPHA) complex 8 g (Silica 3.2 g, DPHA 4.8 g), nano-silica having a particle diameter of 20-30 nm, about 40 weight 0 /. ) 2 g, photoinitiator (trade name: Darocur TPO) 0.2 g, benzotriazole-based yellowing inhibitor (trade name: Tinuvin 400) 0.1 g, fluorine-based surfactant (trade name: FC4430) 0.05 g, methyl ethyl ketone 1 g, a mixture of The coating composition was prepared.
- DPHA Dispersed Silica-Dpentaerythri nucleoacrylate
- the third coating composition was applied on a PET support substrate having a thickness of 15 cm X 20 cm, 188 / im.
- a third coating layer having a thickness of 50 was formed by irradiating ultraviolet light with a wavelength of 280-350 nm using a blow light fluorescent lamp to perform photocuring.
- the first coating composition was applied on the third coating layer.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a first coating layer having a thickness of 50 m.
- the fourth coating composition was applied to the back side of the support substrate.
- ultraviolet rays having a wavelength of 280-350 nm were irradiated with a black light fluorescent lamp to form a fourth coating layer having a thickness of 50 by photocuring.
- the second coating composition was applied onto the fourth coating layer.
- photocuring was performed by irradiating ultraviolet rays with a wavelength of 280-350 nm using a black light fluorescent lamp to form a second coating layer having a thickness of 50.
- Example 3 600 2500 1 150 2200
- the number of grooves was evaluated after reciprocating 400 times with a load of 0.5 kg with respect to the second coating layer. O for 2 or less homes, ⁇ for 3 or more and 5 or less homes, and X for 5 or more homes.
- Transmittance and haze were measured using a spectrophotometer (device name: COH-400). 5) Moisture Resistance Curl Characteristics Cut each plastic film into 10 cm X 10 cm and store it in a chamber at a temperature of 85 ° C and a humidity of 85% for 72 hours, and when placed on a flat surface, one side of each corner should be less than 1 mm away from the flat surface. OK, 1 mm It was evaluated as X when exceeded.
- Each plastic film was wound into a cylindrical manteltel having a diameter of 3 cm with the first coating layer facing outward, and then the presence of cracks was evaluated by 0K and the case of cracks was evaluated as X.
- the plastic films of Examples 1 to 4 of the present invention respectively At least two layers having different modulus of elasticity are laminated on both sides of the supporting substrate, and the second coating layer having a large modulus of elasticity exhibits high physical strength such as high hardness, and the first coating layer having a relatively low modulus of elasticity By contributing to the layer resistance and the flex resistance, it can be seen that it exhibits excellent workability while having a high physical strength to replace the glass.
- the elastic modulus of the first coating layer was 2000 MPa or less, and the difference in the elastic modulus of the first and second coating layers was less than 500 MPa, and the difference was too small, so that the film was separated into the outer layer. It did not show the inner layer resistance and lacked the flexibility.
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Abstract
Description
Claims
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US15/037,361 US10254788B2 (en) | 2013-11-19 | 2014-11-19 | Plastic film |
CN201480062803.8A CN105916923B (zh) | 2013-11-19 | 2014-11-19 | 塑料薄膜 |
JP2016531008A JP6248195B2 (ja) | 2013-11-19 | 2014-11-19 | プラスチックフィルム |
EP14864335.6A EP3042928B1 (en) | 2013-11-19 | 2014-11-19 | Plastic film |
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KR1020140161178A KR101671431B1 (ko) | 2013-11-19 | 2014-11-18 | 플라스틱 필름 |
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JP2017100366A (ja) * | 2015-12-02 | 2017-06-08 | 三菱ケミカル株式会社 | 樹脂積層体及びその製造方法 |
US20180201000A1 (en) * | 2015-08-03 | 2018-07-19 | Lg Chem, Ltd. | Flexible plastic film |
US10118371B2 (en) | 2015-08-03 | 2018-11-06 | Lg Chem, Ltd. | Flexible plastic film |
US10233355B2 (en) | 2015-08-03 | 2019-03-19 | Lg Chem, Ltd. | Flexible plastic film |
US10626292B2 (en) | 2015-08-03 | 2020-04-21 | Lg Chem, Ltd. | Coating composition for flexible plastic film |
CN113009602A (zh) * | 2016-08-23 | 2021-06-22 | 琳得科株式会社 | 硬涂膜 |
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US10626292B2 (en) | 2015-08-03 | 2020-04-21 | Lg Chem, Ltd. | Coating composition for flexible plastic film |
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