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WO2018004288A2 - Film polyester multicouche - Google Patents

Film polyester multicouche Download PDF

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Publication number
WO2018004288A2
WO2018004288A2 PCT/KR2017/006938 KR2017006938W WO2018004288A2 WO 2018004288 A2 WO2018004288 A2 WO 2018004288A2 KR 2017006938 W KR2017006938 W KR 2017006938W WO 2018004288 A2 WO2018004288 A2 WO 2018004288A2
Authority
WO
WIPO (PCT)
Prior art keywords
layer
film
polyester
weight
hours
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2017/006938
Other languages
English (en)
Korean (ko)
Other versions
WO2018004288A3 (fr
Inventor
조은혜
이봉석
임미소
박재봉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kolon Industries Inc
Original Assignee
Kolon Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170082477A external-priority patent/KR102296195B1/ko
Application filed by Kolon Industries Inc filed Critical Kolon Industries Inc
Priority to JP2018567597A priority Critical patent/JP6859370B2/ja
Priority to CN201780041046.XA priority patent/CN109476864B/zh
Publication of WO2018004288A2 publication Critical patent/WO2018004288A2/fr
Publication of WO2018004288A3 publication Critical patent/WO2018004288A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • 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
    • 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
    • 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
    • C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
    • 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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers

Definitions

  • the present invention relates to a polyester multilayer film, and has excellent oligomer barrier property, and relates to an optical polyester multilayer film having excellent antistatic property and excellent transmittance.
  • Antistatic refers to discharging the electric charge accumulated on the insulator surface by an appropriate method.
  • the reason for requiring such antistatic property is that static electricity is generated in the film manufacturing process or the film processing process to cause dust or foreign matter to adhere to the product, and discharge occurs to generate a risk of ignition when an organic solvent is used. Therefore, providing antistatic performance has become an essential requirement.
  • Films with antistatic properties are used in the manufacture of electronic materials and optical products.
  • the conductive polymer antistatic film is mainly used without a humidity dependence, and when the conductive polymer is used to reduce the generation of static electricity, the light transmittance is lowered, and thus there is a limitation in using it as an electronic material and an optical film.
  • such an antistatic film may have a problem that the oligomer is migrated to the surface of the film when the high temperature process is performed in a later process, thereby deteriorating optical properties and charging performance.
  • the present invention is to provide a polyester multilayer film that can be used as an optical film with excellent antistatic properties and at the same time excellent light transmittance.
  • the present invention provides a polyester multilayer film having a low change in surface resistance and excellent antistatic property even after a high temperature and high humidity process.
  • the present invention is formed on the polyester base film, one surface of the polyester base film and formed on the other surface of the antistatic layer and the polyester base film comprising a conductive polymer and an aqueous polyurethane binder, the refractive index is 1.4 ⁇ 1.5 A primer layer,
  • the polyester base film includes a base layer and a skin layer in which at least one layer is laminated on both sides of the base layer, wherein the oligomer content of the polyester resin constituting the skin layer is 0.3 to 0.6 wt%, and diethylene
  • the content of the glycol is 0.1 to 1.2% by weight, and the inherent viscosity relates to a polyester multilayer film satisfying the following formula 1.
  • Ns is the intrinsic viscosity of the polyester resin constituting the skin layer
  • Nc is the intrinsic viscosity of the polyester resin constituting the base layer.
  • the present invention can provide a polyester film having low oligomer migration, low surface resistance change, excellent silicon adhesion and printability, and excellent transmittance under high temperature and high humidity conditions.
  • the polyester film of the present invention has antistatic properties and at the same time excellent in transmittance, it can be used as an optical member for various displays.
  • 'oligomer' is a by-product generated during the polycondensation reaction of terephthalic acid or its derivatives and ethylene glycol during polyester polymerization, and has a weight average molecular weight of about 500 to 10,000 g / mol dimer, tri It means a trimer, a tetramer, etc.
  • One embodiment of the present invention is formed on the polyester base film, and one surface of the polyester base film, an antistatic layer comprising a conductive polymer and an aqueous polyurethane binder and formed on the other surface of the polyester base film, the refractive index is 1.4 ⁇ 1.5 Phosphorus primer layer,
  • the polyester base film includes a base layer and a skin layer in which at least one layer is laminated on both sides of the base layer, wherein the oligomer content of the polyester resin constituting the skin layer is 0.3 to 0.6 wt%, and diethylene
  • the content of the glycol is 0.1 to 1.2% by weight, and the inherent viscosity relates to a polyester multilayer film satisfying the following formula 1.
  • Ns is the intrinsic viscosity of the polyester resin constituting the skin layer
  • Nc is the intrinsic viscosity of the polyester resin constituting the base layer.
  • the polyester multilayer film has a surface resistance of 10 5 to 10 9 ⁇ / sq, less than 2% haze, total light transmittance of 90% or more before heat treatment,
  • the haze change rate ⁇ H 1 satisfies the following formula 2
  • the light transmittance change rate ⁇ TT 1 satisfies the following formula 3
  • the antistatic layer and the primer layer were the polyester base in the evaluation of the adhesive force.
  • H f the haze of the film after holding at 85 ° C., 85% for 72 hours
  • H i the haze of the film before heating.
  • ⁇ TT 1 TT f ⁇ TT i in Formula 3
  • TT f It is the total light transmittance of a film after hold
  • TT i the total light transmittance of a film before heating.
  • the antistatic layer and the primer layer may be maintained on the polyester base film.
  • ⁇ H 2 H f ⁇ H i
  • H f is the haze of the film after holding at 60 ° C., 95% for 120 hours
  • H i is the haze of the film before heating.
  • ⁇ TT 1 TT f ⁇ TT i in Formula 5
  • TT f It is the total light transmittance of a film after hold
  • TT i the total light transmittance of a film before heating.
  • the polyester multilayer film is less than 30 oligomers of the antistatic layer after holding at 85 °C, 85% 72 hours or 60 °C, 95% 120 hours, at 85 °C, 85% 72 After maintaining for 120 hours at 60 ° C. for 95 hours, the number of oligomers in the primer layer may be less than 20.
  • the antistatic layer has a water contact angle of 90 degrees or more
  • the silicone adhesive is applied on the antistatic layer, and the silicone coating layer is maintained when the adhesion evaluation according to ASTM B905 after 2 hours in water at 100 °C It may be.
  • the antistatic layer may be formed by applying an antistatic composition comprising a conductive polymer solution, an aqueous polyurethane binder solution, an organic solvent and water.
  • the organic solvent may be any one or two or more mixed solvents selected from alcohol organic solvents, aprotic high polar organic solvents and amide organic solvents.
  • the antistatic layer may include 1 to 30% by weight of the conductive polymer and 70 to 99% by weight of the aqueous polyurethane binder in 100% by weight of the solid content.
  • the conductive polymer may be a polystyrene sulfonate doped with polyethylene dioxythiophene.
  • the primer layer may be one containing any one or two or more selected from acrylic resin, polyester resin and urethane resin.
  • the primer layer may include a binder resin having a weight ratio of 20 to 80:80 to 20 of the acrylic resin copolymerized with the glycidyl group-containing radically polymerizable unsaturated monomer and the water-dispersible polyester resin. have.
  • the water-dispersible polyester-based resin is a copolymer of a dicarboxylic acid component containing a sulfonic acid alkali metal salt compound and a glycol component containing diethylene glycol,
  • the acrylic resin may be a copolymer monomer containing 20 to 80 mol% of the glycidyl group-containing radical polymerizable unsaturated monomer in all monomer components.
  • the polyester base film has a thickness of 12 to 250 ⁇ m, the base layer is 60 to 90% by weight, the skin layer may be 10 to 40% by weight.
  • the antistatic layer may have a dry coating thickness of 10 to 500 nm, and the primer layer may have a dry coating thickness of 20 to 300 nm.
  • Still another aspect of the present invention is an optical film having at least one functional coating layer selected from a hard coating layer, a printing layer, an adhesive layer, and a release agent layer on the polyester multilayer film.
  • the inventors of the present invention have studied to solve the problem that the total light transmittance of the film is lowered when the conductive polymer is used to improve the antistatic property, a primer layer having a refractive index of 1.4 to 1.5 on the other surface where the antistatic layer is formed.
  • the present invention was completed by finding that physical properties of the total light transmittance of the entire film can be achieved by forming more than 90%.
  • a base film and a skin layer are co-extruded and laminated using three or more layers of films, and the oligomer content is 0.3 to 0.6% by weight, and the content of diethylene glycol is 0.1 to 1.2% by weight.
  • the surface resistance, haze change rate and light transmittance change rate are low under high temperature and high humidity, and the polyester base film, antistatic layer and primer The present invention was completed by finding a small change in adhesion between layers.
  • Ns is the intrinsic viscosity of the polyester resin constituting the skin layer
  • Nc is the intrinsic viscosity of the polyester resin constituting the base layer.
  • the present invention has a feature that can achieve all the desired effects by the combination of the antistatic layer, the polyester base film and the primer layer.
  • polyester base film of the present invention will be described.
  • the polyester base film may be formed of three or more layers, including a skin layer in which at least one or more layers are laminated on both sides of the base layer and the base layer, and may be formed by coextrusion.
  • the polyester base film preferably has a thickness of 12 to 250 ⁇ m, more preferably 50 to 188 ⁇ m, but is not limited thereto.
  • the content of the base layer is 60 to 90% by weight of the entire film
  • the content of the skin layer is preferably 10 to 40% by weight, more preferably the content of the base layer is 70 to 80% by weight
  • the skin layer The content of 20 to 30% by weight is effective because of excellent interfacial stability during coextrusion and excellent barrier property of the oligomer.
  • the base layer may be made of a polyester resin, more specifically, polyethylene terephthalate (PET) resin, but is not limited thereto.
  • PET polyethylene terephthalate
  • the polyethylene terephthalate resin used is preferably used having an intrinsic viscosity of 0.5 to 1.0, more preferably 0.60 to 0.80. When the intrinsic viscosity of the polyethylene terephthalate resin is less than 0.5, the heat resistance may be reduced. If the intrinsic viscosity of the polyethylene terephthalate resin is greater than 1.0, it may not be easy to process the raw material, thereby reducing workability.
  • Skin layer formed by co-extrusion of at least one layer or more on each of both sides of the polyester base layer has an oligomer content of 0.3 to 0.6% by weight, more preferably 0.4 to 0.5% by weight based on the total film weight, diethylene glycol ( The content of DEG) is preferably 0.1 to 1.2% by weight, more preferably 0.7 to 0.8% by weight.
  • the content of DEG is preferably 0.1 to 1.2% by weight, more preferably 0.7 to 0.8% by weight.
  • the polyester resin of the skin layer may be prepared by a synthetic method known in the art in order to have a content of the oligomer and diethylene glycol in the above range, in particular, that is prepared by the solid-phase polymerization of the oligomer and diethylene glycol Effective in reducing the content.
  • the intrinsic viscosity of the polyester resin of the skin layer is preferably 0.6 to 1.0, more preferably 0.65 to 0.85.
  • the heat resistance may be reduced, and if it is more than 1.0, it may not be easy to process the raw material, thereby reducing workability.
  • the base layer and the skin layer may include an inorganic particle, such as an additive added during the manufacture of a conventional film.
  • the polyester base film may be a substrate layer and the skin layer is co-extruded and laminated, it is preferable to satisfy the following formula 1 to improve the workability when co-extruded the base layer and the skin layer.
  • Ns is the intrinsic viscosity of the polyester resin constituting the skin layer
  • Nc is the intrinsic viscosity of the polyester resin constituting the base layer.
  • the intrinsic viscosity ratio of the skin layer and the base layer is more than 1.1, the problem of interfacial instability may occur due to coextrusion, so that the multilayer structure may not be formed, and it is preferable to satisfy the above range, more preferably 1.0 to 1.05. It is effective to improve workability.
  • the present invention includes an antistatic layer on one surface of the polyester base film.
  • the antistatic layer is characterized in that it comprises a conductive polymer and an aqueous polyurethane binder, the water contact angle is 90 degrees or more by including them, the silicone pressure-sensitive adhesive on the antistatic layer, water at 100 °C After leaving for 2 hours at the evaluation of adhesion may be to maintain the silicone coating layer.
  • the antistatic layer comprises a conductive polymer and an aqueous polyurethane binder, the conductive polymer of 1 to 30% by weight, the aqueous polyurethane binder of 70 to 99% by weight of the solid content of 100% by weight It may be. More specifically, the conductive polymer may be 5 to 25% by weight, polyurethane binder may be included in 75 to 95% by weight. More specifically, the conductive polymer may be 10 to 20% by weight, polyurethane binder may be included in 80 to 90% by weight.
  • the antistatic layer may be formed by applying an antistatic composition including a conductive polymer solution, an aqueous polyurethane binder solution, an organic solvent, and water.
  • the antistatic composition may include 40 to 90 wt% of a conductive polymer solution having a solid content of 1 to 3 wt%, 5 to 50 wt% of an aqueous polyurethane binder solution having a solid content of 30 to 40 wt%, It may include 3 to 50% by weight of the organic solvent and the balance of water.
  • the antistatic composition may be any one or two or more additives selected from silicone wetting agents, fluorine wetting agents, slip agents, antifoaming agents, wetting agents, surfactants, thickeners, plasticizers, antioxidants, ultraviolet absorbers, preservatives, crosslinking agents, and the like. It may be to include more.
  • the conductive polymer may be a polythiophene-based, polypyrrole-based, polyaniline-based polymer resin and the like, but is not limited thereto. It is better to use a polythiophene-based conductive polymer resin, and most preferably, a polystyrene sulfonate doped (PEDOT: PSS) in polyethylene dioxythiophene has excellent water dispersibility, thereby forming an antistatic layer by an inline coating process. Although it is possible to pass through the stretching process after the in-line coating process, the transparency is not lowered, and preferred from the viewpoint of expressing heat resistance and the desired surface resistance, but is not limited thereto.
  • the conductive polymer is preferably used in a range satisfying the physical properties of the surface resistance of 10 5 ⁇ 10 9 ⁇ / sq, but is not limited thereto.
  • the conductive polymer resin may be used as a conductive polymer solution mixed with a solvent in order to express optimal dispersibility.
  • a solvent having a high water, alcohol, and dielectric constant It may be used to mix and the like.
  • Commercialized examples may include, but are not limited to, Clevios P (1.2 to 1.4 wt.% Solids content) from Heraeus.
  • the content of the conductive polymer solution in the antistatic composition may be 40 to 90% by weight, and more preferably 50 to 70% by weight, but is not limited thereto in a sufficient amount to achieve the desired physical properties in the above range.
  • the water-based polyurethane binder mixed with the conductive polymer by using the water-based polyurethane binder mixed with the conductive polymer, excellent miscibility, surface resistance performance, excellent adhesion to the polyester base film, physical properties change at high temperature and high humidity conditions it is possible to form an antistatic layer with less yellowing and less yellowing.
  • the water-based polyurethane binder can achieve physical properties with excellent heat resistance and low surface resistance change rate by using a polyurethane binder in which a polycarbonate-based polyol and diisocyanate are reacted. More preferably, the use of hexamethylene diisocyanate as a specific example of the diisocyanate is good from the viewpoint of improving heat resistance to form a coating film with less yellowing, but is not limited thereto.
  • the aqueous polyurethane binder may be dispersed in a solvent, and the solvent is not limited, but any one or two or more selected from the group consisting of an amide organic solvent and an aprotic highly dipolar (AHD) organic solvent. It may be to use a solvent, but is not limited thereto.
  • AHD aprotic highly dipolar
  • Commercialized examples include Neo Rez R-860, R-960, R-972, etc. of Neo Resins, but are not limited thereto.
  • the content of the water-based polyurethane binder in the antistatic composition may be 5 to 50% by weight, and more preferably 10 to 30% by weight, but is not limited thereto in a sufficient amount to achieve the desired physical properties in the above range. .
  • the organic solvent used in the antistatic composition is any one or two or more mixed solvents selected from alcohol-based organic solvents, Aprotic Highly Dipolar (AHD) organic solvents and amide-based organic solvents It may be
  • the content of the organic solvent may be 3 to 50% by weight, more specifically 5 to 40% by weight, more specifically 10 to 30% by weight of the antistatic composition, the content of the conductive polymer and the polyurethane binder in the above range
  • a content suitable for enhancing acidity is not limited thereto.
  • the dispersibility of the conductive polymer is improved, and doping is activated to provide surface resistance.
  • the effect which further improves the performance can be expressed.
  • alcoholic organic solvent More specifically 1 to 30% by weight alcoholic organic solvent, more specifically 5 to 20% by weight of any one or two or more mixed solvents selected from aprotic high polar organic solvent and amide organic solvent, more Specifically, it may be to use 5 to 10% by weight.
  • the alcohol-based organic solvent is not limited, but specifically, for example, methanol, ethanol, propanol, isopropanol, butanol, 2-amino-2-methyl-1-propanol, and the like may be used. Can be used.
  • an alcohol-based organic solvent By using an alcohol-based organic solvent, the mixing and dispersibility between the conductive polymer and the water-based polyurethane resin can be further improved.
  • the aprotic high polar organic solvent is not limited, but specifically, for example, dimethyl sulfoxide, propylene carbonate, or the like may be used, and may be used alone or in combination of two or more. By using an aprotic high polar organic solvent, the conductivity of the conductive polymer can be further improved. When using an aprotic high polar organic solvent alone, it may further include a dispersion stabilizer such as ethylene glycol, glycerin and sorbitol, but is not limited thereto.
  • the amide organic solvent is not limited, but specifically, for example, formamide, N-methylformamide, N, N-dimethylformamide, acetamide, N-methylacetamide, N-dimethylacetamide, N- Methylpyrrolidone and 2-amino-2-methyl-1-propanol and the like can be used, and can be used alone or in combination of two or more.
  • an amide organic solvent By using an amide organic solvent, the conductivity of the conductive polymer can be further improved.
  • the antistatic composition may further include a wetting agent to further improve coating properties.
  • a wetting agent to further improve coating properties.
  • Specific examples include, but are not limited to, for example, Dow Corning's Q2-5212, ENBODIC's TEGO WET 250, BYK CHEMIE's BYK 348, and modified silicone-based wetting agents such as ZONyl's FSH and the like. It is not limited.
  • Wetting agent is preferably used in 0.1 to 2% by weight, it is possible to achieve the desired coating properties in the above range, but is not limited thereto.
  • the antistatic layer may be a dry coating thickness of 10 ⁇ 500nm. If the dry coating thickness is less than 10nm, the surface resistance may not be sufficient, and if the dry coating thickness is greater than 500nm, the blocking range is more likely to occur, but the above range is recommended, but is not limited thereto.
  • the present invention includes a primer layer on the other surface of the antistatic layer is formed.
  • the primer layer preferably has a refractive index of 1.4 ⁇ 1.5, even if the antistatic layer is formed by using a conductive polymer by satisfying the above range, the total light transmittance is 90% or more transparent to the optical film Suitable for use
  • the total light transmittance is low, which is not suitable for use as an optical film.
  • the antistatic layer and the primer layer are formed at the same time, so that the total light transmittance is 90% or more, more specifically, 90 to 95%, and the physical properties with little change in haze can be satisfied at the same time.
  • the primer layer may be formed by applying a water-dispersible resin composition, it may be made of acrylic resin, polyester resin and urethane resin.
  • the primer layer may be formed by applying a water-dispersible resin composition having an oligomer blocking property, and specifically, for example, a glycidyl group-containing radical polymerization of the water-dispersible resin composition having the oligomer blocking property.
  • the unsaturated unsaturated monomer may be copolymerized acrylic resin and water-dispersible polyester resin.
  • the solids content of the water-dispersible polyester resin (B) is less than 20% by weight and the solids content of the acrylic resin (A) copolymerized with the glycidyl group-containing radically polymerizable unsaturated monomer is greater than 80% by weight, As the particle size increases, staining occurs during inline coating, adhesion and transparency with the polyester base film decrease, and the solid content of the water-dispersible polyester resin (B) is greater than 80 wt%, and glycy
  • the solid content of the acrylic resin (A) copolymerized with a dill-containing radically polymerizable unsaturated monomer is less than 20% by weight, sufficient oligomer blocking effect cannot be exhibited, and light transmittance is improved and haze, surface resistance, etc. under high temperature and high humidity conditions. It may not be enough to minimize the change.
  • the water-dispersible resin composition of the present invention may be prepared by mixing a water-dispersible polyester resin (B) and a binder resin mixed with an acrylic resin (A) copolymerized with a glycidyl group-containing radically polymerizable unsaturated monomer, It is also possible to polymerize and produce a glycidyl group-containing radically polymerizable unsaturated monomer alone or a radically polymerizable unsaturated monomer copolymerizable with a glycidyl group-containing radically polymerizable unsaturated monomer in an aqueous dispersion of the water-dispersible polyester resin (B). At this time, surfactant and a polymerization initiator can be used.
  • the surfactant and the polymerization initiator may be used without limitation as long as it is conventionally used in emulsion polymerization.
  • anionic surfactants, nonionic surfactants or non-reactive surfactants can be used, and these can also be used in combination.
  • the polymerization initiator is a radically polymerizable initiator, and nitrogen compounds such as a peroxide initiator or azobis isobutyronitrile can be used.
  • the water dispersion composition of the present invention may further include an antifoaming agent, a wetting agent, a surfactant, a thickener, a plasticizer, an antioxidant, a UV absorber, a preservative, a crosslinking agent and the like as necessary.
  • the crosslinking agent may include a compound of Formula 1, but is not limited thereto.
  • a crosslinking agent of Formula 1 the reaction rate is faster, a primer layer may be formed at a low temperature, and may completely block an oligomer which may be partially leaked by heating after forming the primer layer.
  • a 1 to A 3 are each independently a chemical bond or are selected from (C1-C10) alkylene, and R 1 to R 3 are each independently selected from hydrogen and (C1-C10) alkyl. )
  • the alkyl or alkylene includes both straight and branched chains.
  • a 1 to A 3 are each independently selected from (C 1 -C 5) alkylene, and R 1 to R 3 are each independently selected from (C 1 -C 5) alkyl.
  • a compound of Formula 2 may be used.
  • the compound of Formula 2 while the reaction rate is fast, the reaction temperature is 120 ⁇ 140 °C, more specifically 130 °C in the preheating zone (Preheating Zone) during the film forming process of the polyester film, accordingly glycidyl group It is possible to react with the glycidyl group of the acrylic resin (A) in which the containing radically polymerizable unsaturated monomer is copolymerized, thereby forming a primer coating film having a more dense structure.
  • the crosslinking agent is 1 to 40 parts by weight based on 100 parts by weight of the total solid content of the acrylic resin (A) in which the aqueous dispersion of the water-dispersible polyester resin (B) and the glycidyl group-containing radically polymerizable unsaturated monomer in the water dispersion composition are copolymerized. It is preferable to use a weight part, More preferably, it is 5-20 weight part. If it is less than 1 part by weight, its use effect is insignificant, and when it is used in excess of 40 parts by weight, the properties of the main binder may be lowered, thereby lowering the adhesive strength.
  • the water-dispersible polyester-based resin (B) may be a copolymer of a dicarboxylic acid component containing a sulfonic acid alkali metal salt compound and a glycol component containing diethylene glycol.
  • the dicarboxylic acid component an aromatic dicarboxylic acid and a sulfonic acid alkali metal salt compound may be used, and the sulfonic acid alkali metal salt compound may contain 6 to 20 mol% of the total acid component.
  • the dicarboxylic acid component is an aromatic dicarboxylic acid such as phthalic acid, terephthalic acid, dimethyl terephthalate, isophthalic acid, dimethyl isophthalic acid, 2,5-dimethyl terephthalic acid, 2,6-naphthalene dicarboxylic acid, biphenyldicarboxylic acid and the like.
  • Aliphatic dicarboxylic acids such as an acid, adipic acid, a sebacic acid, alicyclic dicarboxylic acids, such as cyclohexane dicarboxylic acid, etc. can be used.
  • the sulfonic acid alkali metal salt compound include alkali metal salts such as sulfoterephthalic acid, 5-sulfo isophthalic acid, 4-sulfo isophthalic acid, 4-sulfo naphthalic acid-2,7-dicarboxylic acid, and the like. , 6 to 20 mol% may be used. When using less than 6 mol%, the dispersion time of resin to water becomes long, dispersibility is low, and when it uses more than 20 mol%, water resistance may fall.
  • glycol component diethylene glycol and aliphatic glycols having 2 to 8 carbon atoms or alicyclic glycols having 6 to 12 carbon atoms may be used.
  • ethylene glycol, 1,3-propanediol, 1,2-propylene glycol, neopentyl glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol , 1,2-cyclohexanedimethanol, 1,6-hexanediol, P-xylene glycol, triethylene glycol and the like can be used.
  • the number average molecular weights of the said water-dispersible polyester resin (B) are 1000-50000, More preferably, the number average molecular weights are 2000-30000. When the number average molecular weight is less than 1000, the oligomer blocking effect is insignificant, and when the number average molecular weight is more than 50000, water dispersibility may be difficult.
  • the water-dispersible polyester-based resin (B) is used by uniformly dispersing by heating and stirring the water or water containing an aqueous solvent at 50 ⁇ 90 °C.
  • the aqueous dispersion thus prepared has a solid content of 30 wt% or less, more preferably 10 to 30 wt%, for uniform dispersion.
  • the aqueous solvent may be alcohols such as methanol, ethanol, propanol, polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, glycerin, and the like.
  • Acrylic resin (A) copolymerized with a glycidyl group-containing radically polymerizable unsaturated monomer is a homopolymer of a glycidyl group-containing radically polymerizable unsaturated monomer or another radically polymerizable unsaturated monomer copolymerizable with a glycidyl group-containing radically polymerizable unsaturated monomer. It is resin copolymerized.
  • the acrylic resin may be a copolymer monomer containing 20 to 80 mol% of the glycidyl group-containing radical polymerizable unsaturated monomer in all monomer components. Since the glycidyl group-containing radically polymerizable unsaturated monomer improves the strength of the coating film of the primer layer by the crosslinking reaction and increases the crosslinking density, it is possible to block the outflow of the oligomer.
  • glycidyl ethers such as glycidyl acrylate, glycidyl methacrylate, and arylglycidyl ether can be used.
  • Radical polymerizable unsaturated monomers copolymerizable with glycidyl group-containing radical polymerizable unsaturated monomers include vinyl esters, unsaturated carboxylic acid esters, unsaturated carboxylic acid amides, unsaturated nitriles, unsaturated carboxylic acids, allyl compounds, nitrogen-containing vinyl monomers and hydrocarbon vinyl monomers. Or a vinyl silane compound. Vinyl propionate, vinyl stearate, vinyl chloride, etc. can be used as vinyl ester.
  • Unsaturated carboxylic acid esters include methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, ethyl methacrylate, butyl methacrylate, butyl maleate, octyl maleate, butyl fumarate, octyl fumarate, hydroxyethyl methacrylate, Hydroxyethyl acrylate, methacrylate hydroxypropyl, hydroxypropyl acrylate and the like can be used.
  • unsaturated carboxylic acid amide acrylamide, methacrylamide, metyrolacrylamide, butoxy methirol acrylamide, and the like can be used. Acrylonitrile etc.
  • unsaturated nitrile can be used as unsaturated nitrile.
  • unsaturated carboxylic acid acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, maleic acid acid ester, fumaric acid acid ester, itaconic acid acid ester and the like can be used.
  • allyl compound allyl acetate, allyl methacrylate, allyl acrylate, allyl itaconic acid, diallyl itaconic acid and the like can be used.
  • Vinylpyridine, vinyl imidazole, etc. can be used as a nitrogen-containing vinyl monomer.
  • hydrocarbon vinyl monomer ethylene, propylene, hexene, octene, styrene, vinyltoluene, butadiene and the like can be used.
  • vinyl silane compound dimethyl vinyl methoxy silane, dimethyl vinyl ethoxy silane, methyl vinyl dimethoxy silane, methyl vinyl diethoxy silane, gamma-methacryloxy propyl trimethoxysilane, gamma-methacryloxy propyl dimethoxy silane, etc. Can be used.
  • the water-dispersible resin composition according to one embodiment of the present invention has a solid content of 0.5 to 10 weight of the acrylic resin (A) and the water-dispersible polyester resin (B) copolymerized with a glycidyl group-containing radical polymerizable unsaturated monomer as a binder resin. It is preferable that it is a water dispersible or water-soluble composition which is%. More specifically, the solid content of the acrylic resin (A) and the water-dispersible polyester resin (B) copolymerized with the glycidyl group-containing radically polymerizable unsaturated monomer is 0.5 to 10% by weight, and the remainder includes water. It may further include additives such as a wetting agent, a dispersing agent.
  • the wetting agent is used to improve the coating property.
  • a modified silicone wetting agent such as Dow Corning's Q2-5212, ENBODIC's TEGO WET 250, BYK CHEMIE's BYK 348, etc. may be used. It doesn't happen.
  • Wetting agent is preferably used in 0.1 to 0.5% by weight, it is possible to achieve the desired coating properties in the above range, but is not limited thereto.
  • the primer layer may be a dry coating thickness of 20 ⁇ 300nm.
  • the dry coating thickness is less than 20 nm, the oligomer blocking property may not be sufficiently exhibited.
  • the dry coating thickness is greater than 300 nm, a blocking phenomenon may occur after winding the film.
  • the production of the polyester multilayer film including the base layer and the skin layer of the present invention is not limited, but may be obtained by extrusion fusion and casting by biaxial stretching in at least two melt extruders.
  • one extruder is used to extrude polyester, and another extruder is melt extruded simultaneously with additives such as polyester, inorganic particles such as silica, kaolin, and zeolite, and each melt is coextruded in the feed block. After casting, casting, cooling and then biaxial stretching in sequence.
  • the antistatic composition and the water dispersible primer composition may be applied by an in-line coating method of the polyester film manufacturing process.
  • the polyester base film may be prepared by applying an in-line coating method before stretching or before the second stretching after the primary stretching, or by stretching. Water is evaporated by heating during the secondary stretching and heat setting. Layers can be formed.
  • the coating method is not limited as long as it is a known coating method.
  • the polyester multilayer film of the present invention has a surface resistance of 10 5 to 10 9 ⁇ / sq, a haze of 2% or less, a total light transmittance of 90% or more before the heat treatment,
  • the haze change rate ⁇ H 1 satisfies the following formula 2
  • the light transmittance change rate ⁇ TT 1 satisfies the following formula 3
  • the antistatic layer and the primer layer were the polyester base in the evaluation of the adhesion. It can be seen that the optical properties in the high temperature and high humidity conditions are satisfied by satisfying the physical properties maintained in the film.
  • H f the haze of the film after holding at 85 ° C., 85% for 72 hours
  • H i the haze of the film before heating.
  • ⁇ TT 1 TT f ⁇ TT i in Formula 3
  • TT f It is the total light transmittance of a film after hold
  • TT i the total light transmittance of a film before heating.
  • a haze rate of change ⁇ satisfies the H 2 is the following formula 4 and, ⁇ light transmittance change rate TT 2 to have the formula 5 It can be seen that the antistatic layer and the primer layer satisfy all of the physical properties maintained in the polyester base film when the adhesive force is evaluated.
  • ⁇ H 2 H f ⁇ H i
  • H f is the haze of the film after holding at 60 ° C., 95% for 120 hours
  • H i is the haze of the film before heating.
  • ⁇ TT 1 TT f ⁇ TT i in Formula 5
  • TT f It is the total light transmittance of a film after hold
  • TT i the total light transmittance of a film before heating.
  • Hard coating layer, pressure-sensitive adhesive layer, light diffusing layer, ITO layer, printing layer, etc. may be formed on the polyester film of the present invention, and even after heating the functional coating layer, the outflow of the oligomer is blocked to provide optical properties. Since it can be maintained, the polyester film of this invention is suitable for use as an optical film.
  • C represents the concentration of the sample.
  • oligomer By quantitative method, chloroform is added to 1,1,1,3,3,3-hexafluoro-2-propanol, a sample solvent, dissolved at room temperature, and then acetonitrile is precipitated as a polymer. After that, a calibration curve of the cyclic trimer CT-3, which is a standard material, is prepared by using an LC analyzer, and cyclic oligomer purity is determined through sample analysis. As analytical equipment, LC (liquid chromatography) and Agilent's 1100 series were used.
  • Diethylene Glycol (DEG) content is 1 g of a sample in a 50 mL container, 3 mL of monoethanolamine is added and heated using a hot plate to completely dissolve the sample, then cooled to 100 °C 1
  • a solution of 0.005 g of 6-hexanediol dissolved in 20 mL of methanol was added, followed by neutralization by addition of 10 g of terephthalic acid.
  • the obtained neutralized liquid was filtered using a funnel and filter paper, and the filtrate was subjected to gas chromatography (Gas Chromatography) to measure the DEG content (% by weight).
  • GC analysis was measured using a Shimadzu GC analyzer and in accordance with the Shimazu GC manual.
  • Specimens of the film formed were measured using a HAZE METER (model name: Nipon denshoku, Model NDH 5000).
  • the film was placed in a box having a height of 3 cm, a width of 21 cm, and a height of 27 cm with an open top, and then heat-treated at 85 ° C., 85%, 72 Hr and 60 ° C., 95%, 120 Hr, and left for 5 minutes. Then, haze change rate ( ⁇ H) and light transmittance change rate ( ⁇ TT) were measured using a HAZE METER (Nipon denshoku, Model NDH 5000) according to JIS K 715.
  • the haze change rate was calculated according to the following formula 1, and the light transmittance change rate was calculated according to the following formula 2.
  • H f is the haze of the film after holding at 85 ° C., 85% for 72 hours or 60 ° C., 95% for 120 hours
  • Hi is the haze of the film before heating.
  • ⁇ TT TT f -TT i
  • TT f is the total light transmittance of the film after holding at 85 ° C., 85% for 72 hours or 60 ° C., 95% for 120 hours
  • TT i is the total light transmittance of the film before heating.
  • the surface resistance of the antistatic layer of the present invention was evaluated. As a measurement method, surface resistance was measured at 25 ° C., 50% Rh, 10 V, and 10 seconds using a Simco ST-4 device.
  • the surface resistance change was also measured.
  • Coating thickness was measured using a TEM instrument.
  • Drop shape analyzer DSA100 (KRUSS Co., Ltd.) was used as the contact angle measuring instrument, and 4 ⁇ l of water was dropped on the basis of the Tangent Method. If the contact angle is more than 90 °, it indicates the use criteria.
  • Adhesion was measured according to ASTM B905.
  • Momentive PSA6574 was coated on the surface coated with the antistatic coating composition with a silicone adhesive and dried at 150 ° C. for 4 minutes to form a silicon coating layer having a thickness of 30 ⁇ m.
  • the adhesive coated film was placed in boiling water for 2 hours, and then checked for dropping during rubbing to evaluate the adhesion between the antistatic coating layer and the silicone adhesive layer.
  • the polyester film was cut to a size of 100 mm ⁇ 100 mm and then aged in a constant temperature and humidity chamber at 85 ° C., 85% for 72 hours or 60 ° C., 95% for 120 hours. Then, using a reflection mode of the microscope (Leica, DM 2500M) can be observed 27000 ⁇ m 2 when observed at 500 times magnification, the surface area observed 10 times, the number of oligomer particles observed surface 10 times Averaged. The average size of the oligomer particles is 15 ⁇ 5 ⁇ m and observed as black dots when observed.
  • Number of oligomers per unit area (10000 ⁇ m 2 ) (number of oligomer particles per observation / 2.7)
  • the adhesive layer was evaluated by checking whether the coating layer was dropped.
  • the refractive index was measured using an ABBE refractometer (DRGO, ATAGO Co., Ltd.).
  • the first antistatic composition was prepared in a second dilution.
  • the water-dispersible antistatic composition (1) was prepared by mixing 40 wt% of the primary antistatic composition, 59.6 wt% of water, and 0.4 wt% of fluorine-based wetting agent (Zonyl FSH).
  • the acrylic resin (A) contains 50 mol% of glycidyl group-containing radically polymerizable unsaturated monomer as a copolymerization monomer in all monomer components, and the water-dispersible polyester resin contains 50 mol% of diethylene glycol in all glycol components.
  • a sulfonic acid alkali metal salt compound containing 10 mol% of all the acid components and having a weight average molecular weight of 32000 were used.
  • the water-dispersible polyester-based resin (B) is 50 mol% of sulfoterephthalic acid and 85 mol% of terephthalic acid with respect to 50 mol% of diethylene glycol and 50 mol% of ethylene glycol 50 mol%.
  • As the resin polymerized using a weight average molecular weight of 12000 was used.
  • a water dispersible primer composition 2 was prepared by mixing 2 wt% of the solid content of the binder, 0.3 wt% of a silicone-based wetting agent (BYK 348 by BYK CHEMIE), and the balance of water.
  • a silicone-based wetting agent BYK 348 by BYK CHEMIE
  • a conductive polymer aqueous solution Heraeus, Clevios P (solid content 1.3 wt%), 30 wt%, water 6wt%, isopropyl alcohol 5wt% were added to the mixing vessel and stirred for 1 hour, 2-Amino-2-methyl-1-propanol 2 wt% (Alfa aesar, 95%) was added to the mixing vessel and stirred for another 1 hour, followed by adding 50 wt% of NeoRez R-972 (34 wt% solid) of Neo resins with an aqueous polyurethane binder resin and restirring for 30 minutes.
  • NeoRez R-972 34 wt% solid
  • the first antistatic composition to prepare a second dilution.
  • 40 wt% of the primary antistatic composition, 59.6 wt% of water, and 0.4 wt% of a fluorine-based wetting agent (Zonyl FSH) were prepared to prepare a water dispersible antistatic composition (2).
  • polyethylene terephthalate chips having an intrinsic viscosity of 0.63, a content of diethylene glycol of 0.96% by weight, and an oligomer content of 1.4% by weight were introduced into an extruder to melt extrusion.
  • the skin layer (A) has an intrinsic viscosity of 0.67, a content of diethylene glycol of 0.8% by weight, an oligomer content of 0.5% by weight of polyethylene terephthalate chips and an average particle diameter of 0.5 ⁇ m to the total polyethylene terephthalate weight.
  • the sheet was stretched three times in the machine direction (MD) at 120 ° C. Thereafter, the water-dispersible antistatic composition (1) prepared in Preparation Example 1 was coated on one surface by a bar coating method, and the water-dispersible primer composition (2) prepared in Preparation Example 2 was applied to the other surface by a bar coating method. After coating, the film was stretched 3.5 times in the transverse direction (TD) at 150 ° C. Thereafter, heat treatment was performed at 230 ° C. in a five-stage tenter, and at 200 ° C., 10% was relaxed in the longitudinal and transverse directions to prepare a 75 ⁇ m biaxially stretched film coated on both sides.
  • MD machine direction
  • TD transverse direction
  • the prepared polyester multilayer film was 60% by weight of the total film weight, the skin layer was 40% by weight of the total film weight, the dry coating thickness of the antistatic layer is 50 nm, the dry coating thickness of the primer layer is 50 nm.
  • a polyester multilayer film was manufactured in the same manner as in Example 1, except that the dry coating thickness of the primer layer was changed to 100 nm in Example 1.
  • a polyester multilayer film was manufactured in the same manner as in Example 1, except that the dry coating thickness of the primer layer was changed to 150 nm in Example 1.
  • a polyester multilayer film was manufactured in the same manner as in Example 1, except that the base layer was 80% by weight of the total film weight in Example 1, and the skin layer was changed to be 20% by weight of the total film weight.
  • Example 1 except that polyethylene terephthalate having an intrinsic viscosity of 0.65, a diethylene glycol content of 1.2% by weight, and an oligomer content of 1.5% by weight was used as the base layer (B). A polyester multilayer film was prepared.
  • polyethylene terephthalate chips having an intrinsic viscosity of 0.63, a content of diethylene glycol of 0.96% by weight, and an oligomer content of 1.4% by weight were introduced into an extruder to melt extrusion.
  • the skin layer (A) has an intrinsic viscosity of 0.67, a content of diethylene glycol of 0.8% by weight, an oligomer content of 0.5% by weight of polyethylene terephthalate chips and an average particle diameter of 0.5 ⁇ m to the total polyethylene terephthalate weight.
  • the sheet was stretched three times in the machine direction (MD) at 120 ° C. Thereafter, the water-dispersible antistatic composition (2) prepared in Preparation Example 3 was coated on one surface by a bar coating method, and the water-dispersible primer composition (2) prepared in Preparation Example 2 was applied to the other surface by a bar coating method. After coating, the film was stretched 3.5 times in the transverse direction (TD) at 150 ° C.
  • MD machine direction
  • TD transverse direction
  • the prepared polyester multilayer film was 60% by weight of the total film weight, the skin layer was 40% by weight of the total film weight, the dry coating thickness of the antistatic layer is 50 nm, the dry coating thickness of the primer layer is 50 nm.
  • polyethylene terephthalate chips having an intrinsic viscosity of 0.63, a content of diethylene glycol of 0.96% by weight, and an oligomer content of 1.4% by weight were introduced into an extruder to melt extrusion.
  • the skin layer (A) has an intrinsic viscosity of 0.67, a content of diethylene glycol of 0.8% by weight, an oligomer content of 0.5% by weight of polyethylene terephthalate chips and an average particle diameter of 0.5 ⁇ m to the total polyethylene terephthalate weight.
  • the sheet was stretched three times in the machine direction (MD) at 120 ° C. Thereafter, the water-dispersible antistatic composition (1) prepared in Preparation Example 1 was coated on one surface by a bar coating method, and then stretched 3.5 times in a transverse direction (TD) at 150 ° C.
  • MD machine direction
  • TD transverse direction
  • the prepared polyester multilayer film had a base layer of 60% by weight of the total film weight, a skin layer of 40% by weight of the total film weight, and a dry coating thickness of the antistatic layer was 50 nm.
  • polyethylene terephthalate chips having an intrinsic viscosity of 0.63, a content of diethylene glycol of 0.96% by weight, and an oligomer content of 1.4% by weight were introduced into an extruder to melt extrusion.
  • the skin layer (A) has an intrinsic viscosity of 0.67, a content of diethylene glycol of 0.8% by weight, an oligomer content of 0.5% by weight of polyethylene terephthalate chips and an average particle diameter of 0.5 ⁇ m to the total polyethylene terephthalate weight.
  • the sheet was stretched three times in the machine direction (MD) at 120 ° C. Thereafter, the water-dispersible antistatic composition (1) prepared in Preparation Example 1 was coated on both sides by a bar coating method, and then stretched 3.5 times in a transverse direction (TD) at 150 ° C.
  • MD machine direction
  • TD transverse direction
  • the prepared polyester multilayer film was 60% by weight of the total film weight, the skin layer was 40% by weight of the total film weight, and the dry coating thickness of the antistatic layer was 50 nm, respectively.
  • polyester base film a single-layer polyester film was used without co-extrusion into three layers as in Example 1.
  • a polyethylene terephthalate having an intrinsic viscosity of 0.63, a diethylene glycol content of 0.96% by weight, and an oligomer content of 1.8% by weight was added to an extruder to melt extrusion to prepare a single layer polyethylene terephthalate film.
  • a film was prepared in the same manner as in Example 1.
  • polyethylene terephthalate chips having an intrinsic viscosity of 0.63, a content of diethylene glycol of 0.96% by weight, and an oligomer content of 1.4% by weight were introduced into an extruder to melt extrusion.
  • the skin layer (A) has an intrinsic viscosity of 0.67, a content of diethylene glycol of 0.8% by weight, an oligomer content of 0.5% by weight of polyethylene terephthalate chips and an average particle diameter of 0.5 ⁇ m to the total polyethylene terephthalate weight.
  • the sheet was stretched three times in the machine direction (MD) at 120 ° C. Thereafter, the water-dispersible antistatic composition (1) prepared in Preparation Example 1 was coated on one surface by a bar coating method, and then the other surface was coated with a water-dispersible primer composition including a polyurethane-based binder having a refractive index of 1.58. After coating by the (Bar Coating) method, it was stretched 3.5 times in the transverse direction (TD) at 150 °C.
  • MD machine direction
  • TD transverse direction
  • the prepared polyester multilayer film was 60% by weight of the total film weight, the skin layer was 40% by weight of the total film weight, the dry coating thickness of the antistatic layer is 50 nm, the dry coating thickness of the primer layer is 50 nm.
  • polyethylene terephthalate chips having an intrinsic viscosity of 0.63, a content of diethylene glycol of 0.96% by weight, and an oligomer content of 1.4% by weight were introduced into an extruder to melt extrusion.
  • the polyethylene terephthalate chip having an intrinsic viscosity of 0.67, the content of diethylene glycol of 1.3% by weight, the oligomer content of 0.7% by weight, and the silica particles having an average particle diameter of 0.5 ⁇ m are compared with the total polyethylene terephthalate weight.
  • the sheet was stretched three times in the machine direction (MD) at 120 ° C. Thereafter, the water-dispersible antistatic composition (1) prepared in Preparation Example 1 was coated on one surface by a bar coating method, and the water-dispersible primer composition (2) prepared in Preparation Example 2 was applied to the other surface by a bar coating method. After coating, the film was stretched 3.5 times in the transverse direction (TD) at 150 ° C.
  • MD machine direction
  • TD transverse direction
  • the prepared polyester multilayer film was 60% by weight of the total film weight, the skin layer was 40% by weight of the total film weight, the dry coating thickness of the antistatic layer is 50 nm, the dry coating thickness of the primer layer is 50 nm.
  • ⁇ H 1 is a haze change rate measured after 85 ° C. and 85% 72 hours
  • ⁇ H 2 is a haze change rate measured after 60 ° C. and 95% 120 hours.
  • ⁇ TT 1 is the rate of change in total light transmittance measured after 85 ° C. and 85% 72 hours
  • ⁇ TT 2 is the rate of change in total light transmittance measured after 120 hours at 60 ° C., 95%.
  • Adhesion of the antistatic layer 1) is the adhesion of the antistatic layer to the base film measured after 85 °C, 85% 72 hours
  • adhesion of the antistatic layer 2 is the antistatic layer to the base film measured after 60 °C, 95% 120 hours Of adhesion.
  • the adhesion of the primer layer 1) is the adhesion of the primer layer to the base film measured after 85 °C, 85% 72 hours
  • the adhesion of the primer layer 2 is the primer layer to the base film measured after 60 °C, 95% 120 hours Of adhesion.
  • the number of oligomers of the antistatic layer 1) is the number of oligomers of the antistatic layer relative to the base film measured after 85 ° C., 85% 72 hours, and the number of oligomers of the antistatic layer 2) is the base film measured after 60 ° C., 95% 120 hours. Is the number of oligomers of the antistatic layer.
  • Oligomer number 1) of the primer layer is the number of oligomers of the primer layer for the base film measured after 85 °C, 85% 72 hours, oligomer number 2) of the primer layer was measured on the base film measured after 60 °C, 95% 120 hours Is the number of oligomers of the primer layer.
  • Examples 1 to 6 by forming an antistatic layer on one side, and a primer coating layer on the other side, there is little change in surface resistance even after a high temperature and high humidity process, excellent antistatic properties At the same time, it can be seen that the light transmittance is remarkably improved as compared with the comparative example, and the number of oligomers of the antistatic layer and the primer layer is significantly reduced.
  • Example 1 92 10 5.8 10 6.2 10 6.4 ⁇ 1.48
  • Example 2 96 10 5.5 10 5.8 10 6.0 ⁇ 1.48
  • Example 3 100 10 5.2 10 5.4 10 5.6 ⁇ 1.48
  • Example 4 92 10 5.8 10 6.7 10 6.8 ⁇ 1.48
  • Example 5 92 10 5.8 10 6.6 10 6.8 ⁇ 1.48
  • Example 6 90 10 8.2 10 8.6 10 8.8 ⁇ 1.48 Comparative Example 1 92 10 5.8 10 7.4 10 7.6 ⁇ - Comparative Example 2 92 10 5.8 10 7.2 10 7.4 ⁇ - Comparative Example 3 92 10 5.8 10 7.8 10 8.0 ⁇ 1.48 Comparative Example 4 92 10 5.8 10 7.4 10 7.7 ⁇ 1.58 Comparative Example 5 92 10 5.8 10 7.9 10 7.2 ⁇ 1.48
  • the surface resistance 1) is the surface resistance measured after 85 ° C. and 85% 72 hours
  • the surface resistance 2) is the surface resistance measured after 60 ° C. and 95% 120 hours.
  • Examples 1 to 6 was confirmed that the change in the surface resistance is small even after the high temperature and high humidity process, and excellent in antistatic properties.

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Abstract

La présente invention concerne un film polyester multicouche qui est un film polyester multicouche optique présentant d'excellentes propriétés de blocage d'oligomères, de propriétés antistatiques et de transmittance.
PCT/KR2017/006938 2016-06-30 2017-06-30 Film polyester multicouche Ceased WO2018004288A2 (fr)

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KR20210039224A (ko) * 2019-10-01 2021-04-09 동우 화인켐 주식회사 하드코팅 필름 및 이를 포함하는 화상표시장치
CN115298027A (zh) * 2020-03-09 2022-11-04 东洋纺株式会社 白色易粘接性聚酯膜
US11613658B2 (en) 2019-10-01 2023-03-28 Dongwoo Fine-Chem Co., Ltd. Hard coating film and window and image display device using same

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KR101796808B1 (ko) * 2010-05-12 2017-11-10 다이니폰 인사츠 가부시키가이샤 광학 적층체, 광학 적층체의 제조 방법, 편광판 및 화상 표시 장치
US9751286B2 (en) * 2011-06-30 2017-09-05 Jnc Corporation Weather-resistant multilayer film
JP2015187979A (ja) * 2014-03-13 2015-10-29 ナガセケムテックス株式会社 透明導電膜の修復・再生方法及び透明導電積層体
JP6029632B2 (ja) * 2014-09-27 2016-11-24 三菱樹脂株式会社 積層ポリエステルフィルム

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WO2019235770A1 (fr) * 2018-06-04 2019-12-12 동우 화인켐 주식회사 Film de revêtement dur et dispositif d'affichage d'image le comprenant
KR20210039224A (ko) * 2019-10-01 2021-04-09 동우 화인켐 주식회사 하드코팅 필름 및 이를 포함하는 화상표시장치
KR102327415B1 (ko) * 2019-10-01 2021-11-17 동우 화인켐 주식회사 하드코팅 필름 및 이를 포함하는 화상표시장치
US11613658B2 (en) 2019-10-01 2023-03-28 Dongwoo Fine-Chem Co., Ltd. Hard coating film and window and image display device using same
US11760898B2 (en) 2019-10-01 2023-09-19 Dongwoo Fine-Chem Co., Ltd. Hard coating film and window and image display device using same
CN115298027A (zh) * 2020-03-09 2022-11-04 东洋纺株式会社 白色易粘接性聚酯膜
CN115298027B (zh) * 2020-03-09 2024-01-12 东洋纺株式会社 白色易粘接性聚酯膜
US12421363B2 (en) 2020-03-09 2025-09-23 Toyobo Co., Ltd. White easy-adhesive polyester film comprising a nitrogen-containing antistatic agent

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