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WO2016003138A1 - Film polyester, et film d'électrode transparent l'utilisant - Google Patents

Film polyester, et film d'électrode transparent l'utilisant Download PDF

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Publication number
WO2016003138A1
WO2016003138A1 PCT/KR2015/006648 KR2015006648W WO2016003138A1 WO 2016003138 A1 WO2016003138 A1 WO 2016003138A1 KR 2015006648 W KR2015006648 W KR 2015006648W WO 2016003138 A1 WO2016003138 A1 WO 2016003138A1
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WO
WIPO (PCT)
Prior art keywords
layer
primer layer
polyester film
weight
film
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PCT/KR2015/006648
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English (en)
Korean (ko)
Inventor
정두환
최성란
Original Assignee
코오롱인더스트리 주식회사
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Application filed by 코오롱인더스트리 주식회사 filed Critical 코오롱인더스트리 주식회사
Priority to JP2016575083A priority Critical patent/JP6342021B2/ja
Priority to CN201580035672.9A priority patent/CN106660338B/zh
Publication of WO2016003138A1 publication Critical patent/WO2016003138A1/fr

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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
    • B32B27/08—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 of synthetic resin
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Definitions

  • the present invention relates to a polyester film for applying to a touch screen panel and a transparent electrode film using the same. More specifically, no rainbow phenomenon occurs during hard coating on one side, and the oligomer in the polyester film is prevented from migrating to the surface, and the adhesive force is excellent under high temperature and high humidity conditions, so that the adhesion to the transparent electrode layer and the optical properties are excellent. It relates to a polyester film and a transparent electrode film using the same.
  • Optical film has grown as the BLU (Back Light Unit) market, including LCD and PDP, expands. Recently, it is applied to various fields of a display such as a touch screen panel (TSP) such as a mobile phone and a tablet PC.
  • BLU Back Light Unit
  • PDP touch screen panel
  • Such optical films require excellent transparency and visibility, and use biaxially stretched polyester films having excellent mechanical and electrical properties as base films.
  • the biaxially stretched polyester film has low surface hardness and lacks abrasion resistance or scratch resistance, surface damage is easily caused by friction or contact with an object when used as an optical member of various displays.
  • the surface of the film is hard coated. Hard coating is essential for optical films for transparent electrodes such as Ag nanowires and metal meshes, as well as optical films for indium tin oxide (ITO) transparent electrodes that are currently applied to TSP applications.
  • transparent electrodes such as Ag nanowires and metal meshes
  • ITO indium tin oxide
  • the optical film for transparent electrodes forms a primer coating layer as an intermediate layer in order to improve the adhesion between the polyester film as the base layer and the hard coating layer.
  • the primer coating layer conventional acrylic resins or urethane resins are used to improve the adhesion between the base layer and the hard coating layer, and to remove the optical interference phenomenon (Rainbow phenomenon) caused by the high refractive index difference between the hard coating layer and the polyester film.
  • the primer coating layer is formed by using such a resin alone, since the refractive index is about 1.5, the hard coating layer and the hard coating layer are biased toward the refractive index of the hard coating layer at 1.64 which is the surface refractive index of the biaxially stretched polyester film and 1.52 which is the refractive index of a conventional hard coating layer. It is difficult to eliminate the optical interference phenomenon, that is, the rainbow phenomenon caused by the high refractive index difference between the polyester films. This has a problem of reducing eye fatigue and screen visibility.
  • the present invention is to provide a polyester film excellent in the adhesive strength even in high temperature and high humidity conditions without the rainbow phenomenon, preventing the oligomer in the film migration to the surface.
  • an object of this invention is to provide the transparent electrode film excellent in the adhesive force with a transparent conductive layer, and an optical characteristic using the said polyester film.
  • the present invention for achieving the above object is a base layer, a laminated first primer layer laminated on one surface of the base layer, a second primer layer different from the first primer layer on the opposite surface of the first primer layer and the agent 1 includes a hard coating layer on top of the primer layer.
  • the first primer layer and the second primer layer is made of different components, preferably, the glass transition temperature difference is 10 ⁇ 30 °C, the swelling degree difference 10 ⁇ 35% and gel fraction difference 10 ⁇ 40% poly Provide an ester film.
  • the first primer layer and the second primer layer are ester-based copolymers of a dicarboxylic acid component containing a sulfonic acid alkali metal salt compound and a glycol component containing diethylene glycol.
  • a dicarboxylic acid component containing a sulfonic acid alkali metal salt compound and a glycol component containing diethylene glycol.
  • Suzy Urethane-based resins containing a linear diol having two terminal groups and a branched polyol having three or more terminal groups
  • acrylate resins including acrylate compounds and melamine compounds It may include an aqueous dispersion composition, a silicone-based wetting agent and colloidal silica particles comprising any one or two or more binder resins selected from among.
  • the first primer layer and the second primer layer are 5 to 10% by weight of binder resin, 0.1 to 0.5% by weight of silicone-based wetting agent, 0.1 to 0.5% by weight of colloidal silica particles, and It may contain a residual amount of water.
  • the ester resin may have a number average molecular weight of 1,000 to 50,000.
  • the urethane-based resin may have a weight average molecular weight of 10,000 ⁇ 20,000g / mol.
  • the acrylate resin may include 10 to 30% by weight of the melamine-based compound.
  • the water dispersion composition may have a solid content of 0.5 to 20% by weight.
  • each of the first primer layer and the second primer layer may have a dry coating thickness of 20 to 150 nm.
  • the thickness of the base layer may be 25 ⁇ 250 ⁇ m.
  • the substrate layer may be a polyethylene terephthalate film.
  • the present invention can provide a transparent electrode film having a transparent conductive layer formed on the polyester film described above.
  • the transparent conductive layer may be any one or more selected from indium tin oxide, indium zinc oxide, zinc oxide, tin oxide, carbon nanotubes, silver nanowires and metal mesh.
  • the transparent electrode film according to an embodiment of the present invention may further include an adhesive layer and a protective film layer on the opposite side on which the transparent conductive layer is formed.
  • the polyester film according to the present invention does not generate a rainbow phenomenon during the single-side hard coating, and has an advantage of preventing migration of the oligomer in the film to the surface.
  • the present invention has an advantage of providing a polyester film having excellent adhesion to the transparent electrode layer and excellent optical properties under high temperature and high humidity conditions, and a transparent electrode film having excellent optical properties using the same.
  • FIG. 1 and 2 is a schematic view showing a transparent conductive film according to an embodiment of the present invention.
  • Figure 3 shows the results according to the blocking evaluation method of the examples and comparative examples of the present invention.
  • the 'primer layer' refers to a coating film formed during the stretching process or before the stretching process in the manufacturing process of the polyester film and formed through the stretching process.
  • a first primer layer and a second primer layer formed of different components are formed on both surfaces of the substrate layer and the substrate layer, and a hard coating layer is formed on an upper surface of the first primer layer or the second primer layer. It provides a polyester film.
  • the polyester film according to the present invention includes a base layer, a first primer layer laminated on one surface of the base layer, a second primer layer on a surface of the first primer layer, and a hard coating layer on the first primer layer.
  • the first primer layer and the second primer layer is composed of components of different compositions, the glass transition temperature difference is 10 ⁇ 30 °C, the swelling degree difference is 10 ⁇ 35% and the gel fraction (gel fraction) difference 10 ⁇ 40% It is characterized by that.
  • the glass transition temperature (Tg) is a value measured in 2nd Run mode using a DSC (using PerkinElmer DSC 7) instrument.
  • the swelling degree of each primer layer means a value calculated by the following Equation 1.
  • the weight after standing means the weight measured after soaking the dry coating film of about 1g in 50g of distilled water and left at 70 °C for 24 hours.
  • the gel fraction of each primer layer means a value calculated by the following formula (2).
  • gel fraction (weight after drying-initial weight) ⁇ 100
  • the weight after drying refers to the weight measured after soaking about 1g of the dry coating film in 50g of distilled water, and then leaving it at 70 ° C for 24 hours, and drying the leftover film at 120 ° C for 3 hours.
  • the first primer layer and the second primer layer is an ester resin copolymerized with a glycol component containing a dicarboxylic acid component containing a sulfonic acid alkali metal salt compound and a diethylene glycol; Urethane-based resins containing a linear diol having two terminal groups and a branched polyol having three or more terminal groups; And acrylate resins including acrylate compounds and melamine compounds; It is formed using an aqueous dispersion composition containing any one or two or more resins selected from.
  • the ester resin is a copolymer of a dicarboxylic acid component containing a sulfonic acid alkali metal salt compound and a glycol component containing diethylene glycol.
  • dicarboxylic acid component an aromatic dicarboxylic acid and a sulfonic acid alkali metal salt compound can be used.
  • 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.
  • aromatic dicarboxylic acids such as acid, adipic acid, sebacic acid, cycloaliphatic dicarboxylic acid, such as cyclohexane dicarboxylic acid, etc. can be used, It is not necessarily limited to this.
  • the sulfonic acid alkali metal salt compound may be, for example, an alkali metal salt such as sulfoterephthalic acid, 5-sulfo isophthalic acid, 4-sulfo isophthalic acid, 4-sulfo naphthalic acid-2,7-dicarboxylic acid, or the like. 6 to 20 mol% of the total acid component may be included. 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, but are not necessarily limited thereto.
  • the ester resin preferably has a number average molecular weight of 1,000 to 50,000, more preferably a number average molecular weight of 2,000 to 30,000. When the number average molecular weight is less than 1,000, the oligomer blocking effect is insignificant, and when the number average molecular weight is more than 50,000, water dispersibility may be difficult.
  • the urethane resin may be prepared by polymerizing a linear diol and a branched polyol having three or more end groups and an isocyanate monomer.
  • a linear diol and a branched polyol having three or more end groups and an isocyanate monomer Preferably, 10 to 75% by weight of linear diols and 25 to 90% by weight of branched polyols may be used.
  • the content of the branched polyol is less than 25% by weight, the swelling degree and the gel fraction cannot be satisfied, and it is difficult to obtain a coating film having excellent adhesion in high temperature and high humidity conditions.
  • the content of the branched polyol exceeds 90% by weight, the viscosity rises rapidly due to excessive gelation, making it difficult to prepare the water-dispersed composition, and defects in surface appearance such as cracks on the surface when the film is coated on the film surface This can happen.
  • the branched polyol means a resin having three or three or more isocyanate functional groups.
  • the method of preparing the urethane-based resin may include a polyol 39 to 45 wt%, a trimethylol propane 0.3 to 1.2 wt%, and an isocyanate compound 50 to 57 wt% to prepare a prepolymer having an isocyanate as an end group, followed by preparing an inorganic acid salt. It can be prepared by blocking the ionic group of the sulfate at the end of the isocyanate by reacting 3 to 4% by weight, but is not limited thereto.
  • the urethane-based resin is preferred because it does not gelate in the range of the weight average molecular weight of 10,000 ⁇ 20,000g / mol, it is possible to obtain a water-dispersible coating film excellent in physical properties at high temperature and high humidity.
  • the weight average molecular weight can be measured using a GPC-MALS (Multi Angle Light Scattering) system (Wyatt, Inc.) (Measurement after melting the sample in the THR, the calibration curve can be polystyrene as a standard sample), the configuration of the MALS system Is shown below.
  • GPC-MALS Multi Angle Light Scattering
  • Wyatt, Inc. Measurement after melting the sample in the THR, the calibration curve can be polystyrene as a standard sample
  • the polyol may be a polyester-based polyol or a polyether-based polyol, preferably a polyester-based polyol.
  • Polyester-based polyols include polyols prepared from the reaction of carboxylic acid, sebacic acid or an acid anhydride with a polyhydric alcohol.
  • the type of the polyol is not limited, and it is preferable to use a polyester polyol having a weight average molecular weight of 600 to 3000. Its content is preferably 39 to 45% by weight. When used at less than 39% by weight, the molecular weight is small, the primer layer is too hard, it is difficult to stretch, the coating appearance is not excellent, and when more than 45% by weight, the ILC layer is too soft (Soft) is poor blocking properties Can be.
  • the trimethylol propane is used to prepare a prepolymer having a trifunctional group, and it is preferable to use 0.3 to 1.2% by weight. In case of using less than 0.3% by weight, the crosslinking density decreases, and anti-blocking property is inferior, and in the case of using more than 1.2% by weight, the crosslinking density becomes too high and elongation deteriorates. This is not excellent and the adhesion may be bad.
  • the isocyanate compound is not limited but preferably hexamethylene diisocyanate is used.
  • the content can be prepared a prepolymer having a trifunctional group in the range using 50 to 57% by weight.
  • the inorganic acid salt is preferably used sodium hydrogen sulfate (Sodium Hydrogen Sulfate), the content is preferably used 3 to 4% by weight.
  • the acrylate resin includes an acrylate compound and a melamine compound.
  • the acrylate resin may include 10 to 30% by weight of the melamine-based compound.
  • acrylate compound examples include methyl acrylate, methyl acrylate, isopropyl acrylate, n-propyl acrylate and n-butyl acrylate.
  • n-butyl acrylate isobornyl acrylate, 2-ethylhexyl acrylate, 2-methylhexyl acrylate, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate Isobutyl methacrylate, n-propyl methacrylate, tert-butyl methacrylate, tert-butyl methacrylate, n-butyl methacrylate, isobutyl methacrylate Isobutyl methacrylate, cyclohexyl methacrylate, isoCObornyl methacrylate, diethylene glycol monomethyl ether methacrylate ethyl ether methacrylate), 2-ethylhexyl methacrylate,
  • the melamine-based compound may be at least one selected from the group consisting of hexamethoxymethylmelamine, hexaethoxymethylmelamine, hexapropoxymethylmelamine, hexabutoxymethylmelamine, hexapentyloxymethylmelamine and hexahexyloxymethylmelamine. It is not necessarily limited thereto.
  • the first primer layer or the second primer layer is formed using an aqueous dispersion composition including any one or two or more resins selected from the above-described ester resin, urethane resin and acrylate resin.
  • an aqueous dispersion composition including any one or two or more resins selected from the above-described ester resin, urethane resin and acrylate resin.
  • the dispersion composition is applied, and is formed through stretching and heat treatment processes.
  • the first primer layer and the second primer layer is characterized by being formed of different components.
  • the first primer layer and the second primer layer is characterized in that the glass transition temperature difference is 10 ⁇ 30 °C, the swelling degree difference is 10 ⁇ 35% and the gel fraction difference is 10 ⁇ 40%.
  • the present invention can prevent the rainbow phenomenon by the combination of the glass transition temperature, the swelling degree and the gel fraction difference satisfies the above range, and prevents the oligomer in the film migration to the surface and at the same time improve the adhesion even under high temperature and high humidity conditions You can. More preferably, the difference in glass transition temperature, swelling degree and gel fraction between the first primer layer and the second primer layer formed from the different components is 15 to 25 ° C., the swelling degree is 15 to 30%, and the gel fraction is 20 to 20%, respectively. 40% is more preferable because it can maximize physical properties such as blocking, rainbow phenomenon, adhesion, adhesion to the conductive layer, and haze properties.
  • the glass transition temperature of each of the primer layer is less than 30 °C, the primer layer becomes soft after the coating film is formed, the blocking property may be inferior, if the glass transition temperature is more than 90 °C, the primer layer is hard and the stretching is difficult The coating appearance is not good.
  • the water dispersion composition includes water in the above-described resin, and may further include additives such as a wetting agent and a dispersing agent, if necessary.
  • the wetting agent is used to improve the coating property, and specifically, for example, modified silicone-based wetting agents such as Q2-5212 manufactured by Dow Corning, TEGO WET 250 manufactured by ENBODIC, BYK 348 manufactured by BYK CHEMIE, and the like may be used. It is not limited to this.
  • the wetting agent may be preferably used in 0.1 to 0.5% by weight, it is possible to achieve the desired coating properties in the above range.
  • the water dispersion composition may include colloidal silica particles for coating and heat resistance processing.
  • the colloidal silica particles are preferably used having an average particle diameter of 50 ⁇ 1,000nm.
  • the colloidal silica particles are preferably included in an aqueous dispersion composition of 0.1 to 0.5% by weight in order to express the effect.
  • the water dispersion composition may have a solid content of 0.5 to 20% by weight. If the solid content is less than 0.5% by weight, the use effect is insignificant, and if it is more than 20% by weight, cracks may occur on the surface of the primer layer.
  • the base layer preferably has a thickness of 25 to 250 ⁇ m, more preferably 50 to 188 ⁇ m. If the thickness is less than 25 ⁇ m does not implement suitable mechanical properties for the optical film, if the thickness is greater than 250 ⁇ m may cause a problem that the film is too thick to be suitable for the thinning of the display device.
  • the base layer made of the polyester resin may be made of polyethylene terephthalate (PET) resin alone, and may be a copolymer copolymerized with a monomer that may be copolymerized with the polyethylene terephthalate.
  • PET polyethylene terephthalate
  • polyethylene terephthalate homopolymer can be used.
  • the polyethylene terephthalate resin used at this time is preferably intrinsic viscosity is preferably 0.5 to 1.0, more preferably 0.60 to 0.80.
  • the intrinsic viscosity of the resin used as the substrate layer is less than 0.5, the heat resistance may be reduced, and if it exceeds 1.0, the raw material may not be easily processed and workability may be reduced.
  • the base layer may include any one or two or more inorganic particles selected from silica, kaolin, zeolite, the content may be included in the range of 10 ⁇ 1000ppm with respect to the weight of the total polyester resin of the base layer.
  • the primer layer for satisfying the physical properties of the polyester film according to the present invention may be a dry coating thickness of 20 ⁇ 150nm.
  • the dry coating thickness is less than 20 nm, the oligomer blocking property may not be sufficiently exhibited, and damage such as scratches may be caused. If the thickness is more than 150 nm, a coating stain may appear, and a blocking phenomenon in which the primer layers may stick to each other after the film is wound may increase.
  • the primer layer for satisfying the physical properties may include any one or two or more inorganic particles selected from silica, kaolin, zeolite, if necessary, the content is 1.0 to 4.0% by weight of the total water dispersion composition content It is preferable to use, and it is effective to use 2.0 to 3.0 weight% more preferably. If the size of the inorganic particles is less than 2.0 ⁇ m may reduce the coiling property due to the protrusion of the particles, if the size of more than 4.0 ⁇ m transparency due to the size effect may be lowered to increase the haze of the product.
  • the production of the polyester film according to an embodiment of the present invention is not limited, but the PET chip may be cast by melt extrusion in a melt extruder and obtained by biaxial stretching. More specifically, additives such as polyester and inorganic particles such as silica, kaolin, and zeolite are simultaneously melt-extruded in one extruder, cast, cooled and then biaxially stretched sequentially.
  • additives such as polyester and inorganic particles such as silica, kaolin, and zeolite are simultaneously melt-extruded in one extruder, cast, cooled and then biaxially stretched sequentially.
  • the water dispersion composition according to an embodiment in the present invention may be applied by an in-line coating method of the polyester film manufacturing process. That is, the polyester 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, and may be prepared by stretching. Water is evaporated by heating in the secondary stretching and heat setting process, and thus the primer layer. This can be formed.
  • the coating method is not limited as long as it is a known coating method.
  • the present invention can provide a transparent electrode film in which a transparent conductive layer is formed on the upper surface of the polyester film, that is, on the opposite side of the hard coating layer of the cross section.
  • the transparent conductive layer may be selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), tin oxide (SnO 2 ), carbon nanotubes, silver nanowires, and metal meshes. It is not necessarily limited thereto.
  • the transparent electrode film may further include an adhesive layer and a protective film layer on the opposite side on which the transparent conductive layer is formed.
  • the polyester film of the present invention may be represented as shown in FIGS. 1 and 2. That is, the first primer layer 210 is laminated on the upper surface of the base layer 100, the hard coating layer 300 is laminated on the upper surface of the first primer layer 210, and on the opposite surface of the first primer layer.
  • the second primer layer 220 is formed.
  • a transparent electrode film in which the transparent electrode layer 400 is formed on one surface of the second primer layer 220 may be provided.
  • the physical properties were measured by the following method.
  • the hard coating is formed on the first primer layer, and the film with the second primer layer remaining is placed in a box having a height of 3 cm, a width of 21 cm, and a length of 27 cm, and heat treated at 150 ° C. for 60 min to migrate the oligomer to the film surface. After the migration, the mixture was left for 5 minutes and the Haze value was measured by using HAZE METER (Nipon denshoku, Model NDH 5000) according to JIS K 715.
  • the haze change amount was calculated according to the following formula (1).
  • Hf is the haze of the film after holding at 150 ° C. for 60 minutes
  • Hi is the haze of the film before heating.
  • the cross section of the film was measured by SEM (Hitachi S-4300) by specifying 5 points at 1m intervals in the vertical direction of the machine direction (TD) in which the coating composition was coated. The average value was calculated after measuring 30 points in the interval.
  • the hard coating treatment (refractive index 1.52) on one side of the other side was blackened to determine whether the rainbow is visible to the naked eye. Visual evaluation was performed under a three-wavelength lamp in the dark room.
  • the hard coating treatment (refractive index 1.52) on one side of the other side was treated black to measure the reflection pattern of the visible region through UV-Visible (CARY 5000).
  • the ripple amplitude is reduced compared to the ripple amplitude in other wavelength ranges from 500 to 600 nm, and the ripple amplitude is less than 1%
  • the ripple amplitude is reduced compared to the ripple amplitude in other wavelength bands from 500 to 600 nm, and the ripple amplitude is less than 3%
  • the adhesive force at room temperature is 100 cells in 1 cm X 1 cm compartment using Cross Hatch Cutter (YCC-230 / 1) Draw the adhesive force tape (nichban No. 405) and proceed to tear three times.
  • the adhesive strength between the hard coating layer and the easily adhesive layer was evaluated by the above method.
  • a binder (Rohm & Haas, P3208) prepared using 40% by weight of methyl methacrylate, 40% by weight of ethyl acrylate and 20% by weight of melamine was used. 4% by weight of the binder, a silicone-based wetting agent (Dow Corning, polyester siloxane copolymer, Q2-5212) 0.3% by weight, 0.3% by weight of colloidal silica particles having an average particle diameter of 140nm was added to water and stirred for 2 hours 1 water dispersion composition was prepared.
  • the primer layer prepared using the first water dispersion composition had a glass transition temperature of 42.4 ° C., a swelling degree of 29.6%, and a gel fraction of 90.0.
  • a silicone-based wetting agent Dow Corning, polyester siloxane copolymer, Q2-5212 0.3% by weight, 0.3% by weight of colloidal silica particles having an average particle diameter of 140nm was added to water and stirred for 2 hours 2 water dispersion composition was prepared.
  • the primer layer prepared using the second water dispersion composition had a glass transition temperature of 63.8 ° C., a swelling degree of 46.3%, and a gel fraction of 55.0.
  • a water-dispersed polyurethane having a content of 50% by weight of branched polyols was prepared. 40 wt% of polyethyleneadipate diol, 0.6 wt% of trimethylol propane, and 55.9 wt% of hexamethylene diisocyanate were reacted to prepare a prepolymer having an isocyanate functional group as a prepolymer. 3.5 wt% of sodium hydrogen sulfate was reacted with isocyanate, which is a terminal functional group of the prepolymer, to prepare a polyurethane having a weight average molecular weight of 14,400 g / mol.
  • the primer layer prepared using the third water dispersion composition had a glass transition temperature of 52.6 ° C., a swelling degree of 61.7%, and a gel fraction of 80.0.
  • a polyethylene terephthalate sheet having a thickness of 2000 ⁇ m was prepared by quenching and solidifying with a casting drum having a surface temperature of 20 °C.
  • the prepared polyethylene terephthalate sheet was stretched 3.5 times in the machine direction (MD) at 80 ° C. and then cooled to room temperature.
  • a second primer layer was formed on the one surface of the sheet by a bar coating method using the first water dispersion composition prepared in Preparation Example 1, and the agent prepared in Preparation Example 2 was formed on the opposite side of the sheet.
  • the second primer composition was formed by the bar coating method. Thereafter, the temperature was increased by 1 ° C.
  • the dry coating thickness of the first primer layer was 80 nm
  • the second primer layer was 80 nm.
  • a hard coating layer having a surface hardness of 2H on the first primer layer and a thickness of 3 ⁇ m after drying is formed through a UV curing process, and a transparent electrode layer (silver (Ag) nanowire layer) is formed on the second primer layer. Formed.
  • a polyethylene terephthalate sheet having a thickness of 2000 ⁇ m was prepared by quenching and solidifying with a casting drum having a surface temperature of 20 °C.
  • the prepared polyethylene terephthalate sheet was stretched 3.5 times in the machine direction (MD) at 80 ° C. and then cooled to room temperature.
  • a second primer layer was formed on the one surface of the sheet by a bar coating method using the first water dispersion composition prepared in Preparation Example 1, and the agent prepared in Preparation Example 3 was formed on the opposite side of the sheet.
  • the first water-disperse composition was formed by a bar coating method (bar coating).
  • the temperature was increased by 1 ° C. per second to 110 to 150 ° C., followed by preheating and drying to draw 3.5 times in the transverse direction (TD).
  • heat treatment was performed at 230 ° C. in a 5-stage tenter, and thermally fixed at 10 ° C. in the longitudinal and transverse directions at 200 ° C. to prepare a 188 ⁇ m biaxially oriented film coated on both sides.
  • the dry coating thickness of the first primer layer was 80 nm, and the second primer layer was 80 nm.
  • a hard coating layer having a surface hardness of 2H on the first primer layer and a thickness of 3 ⁇ m after drying is formed through a UV curing process, and a transparent electrode layer (silver (Ag) nanowire layer) is formed on the second primer layer. Formed.
  • a polyethylene terephthalate sheet having a thickness of 2000 ⁇ m was prepared by quenching and solidifying with a casting drum having a surface temperature of 20 °C.
  • the prepared polyethylene terephthalate sheet was stretched 3.5 times in the machine direction (MD) at 80 ° C. and then cooled to room temperature.
  • a second primer layer was formed on the one surface of the sheet by a bar coating method using the second water dispersion composition prepared in Preparation Example 2, and the agent prepared in Preparation Example 3 was formed on the opposite side of the sheet.
  • the first water-disperse composition was formed by a bar coating method (bar coating).
  • the temperature was increased by 1 ° C. per second to 110 to 150 ° C., followed by preheating and drying to draw 3.5 times in the transverse direction (TD).
  • heat treatment was performed at 230 ° C. in a 5-stage tenter, and thermally fixed at 10 ° C. in the longitudinal and transverse directions at 200 ° C. to prepare a 188 ⁇ m biaxially oriented film coated on both sides.
  • the dry coating thickness of the first primer layer was 80 nm, and the second primer layer was 80 nm.
  • a hard coating layer having a surface hardness of 2H on the first primer layer and a thickness of 3 ⁇ m after drying is formed through a UV curing process, and a transparent electrode layer (silver (Ag) nanowire layer) is formed on the second primer layer. Formed.
  • Example 1 The same method as in Example 1 was carried out except that only the first water dispersion composition was used to form the first primer layer and the second primer layer in Example 1.
  • Example 1 The same method as in Example 1 was carried out except that only the second water dispersion composition was used to form the first primer layer and the second primer layer in Example 1.
  • Examples 1 to 3 according to the present invention showed excellent blocking prevention performance. Specifically, in Example 1, no blocking phenomenon occurred at all up to 140 ° C, and Examples 2 and 3 maintained excellent blocking prevention performance up to 120 ° C or 100 ° C, respectively. On the other hand, in Comparative Example 2, a blocking phenomenon occurred at 120 ° C, and in Comparative Example 3, a blocking phenomenon occurred at 100 ° C. In addition, as can be seen in Table 2, Example 1 according to the present invention, while implementing the excellent blocking prevention performance, no rainbow phenomenon occurs, the adhesion was also very excellent. On the other hand, Comparative Example 1, although a good blocking prevention effect was implemented, but a rainbow phenomenon occurred, the adhesion was also significantly lower than in Example 1. In addition, as a result of comparing the adhesion layer between the primer layer and the transparent conductive layer, as shown in Table 3, Example 1 according to the present invention had better adhesion than Comparative Examples 2 and 3, and had little difference in haze change rate. .

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Abstract

La présente invention porte sur un film polyester destiné à être appliqué à un film d'écran tactile ; et sur un film d'électrode transparent l'utilisant, et, de façon plus spécifique, sur : un film polyester ne générant pas de phénomène d'arc-en-ciel quand un revêtement dur de section transversale est effectué, bloquant la migration d'un oligomère à l'intérieur d'un film polyester sur la surface, et ayant une excellente force d'adhérence à une température élevée et sous une humidité élevée, de façon à présenter ainsi une excellente adhérence sur une couche d'électrode transparente et d'excellentes caractéristiques optiques ; et un film d'électrode transparent l'utilisant.
PCT/KR2015/006648 2014-06-30 2015-06-30 Film polyester, et film d'électrode transparent l'utilisant WO2016003138A1 (fr)

Priority Applications (2)

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JP2016575083A JP6342021B2 (ja) 2014-06-30 2015-06-30 ポリエステルフィルム及びそれを用いた透明電極フィルム
CN201580035672.9A CN106660338B (zh) 2014-06-30 2015-06-30 聚酯薄膜以及使用该聚酯薄膜的透明电极膜

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KR10-2014-0081200 2014-06-30
KR1020140081200A KR102220972B1 (ko) 2014-06-30 2014-06-30 폴리에스테르 필름 및 이를 이용한 투명전극 필름

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KR (1) KR102220972B1 (fr)
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KR101801919B1 (ko) 2016-06-17 2017-11-27 에스케이씨 주식회사 폴리에스테르 단층 필름
TWI698784B (zh) * 2018-03-14 2020-07-11 日商阿爾卑斯阿爾派股份有限公司 透明電極構件、層積透明電極構件及靜電電容式感測器
CN108749244B (zh) * 2018-06-07 2020-07-14 浙江欣麟新材料技术有限公司 一种光学高柔性导电玻璃膜及其制备方法
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KR102552063B1 (ko) 2020-12-23 2023-07-07 동우 화인켐 주식회사 전극 구조체, 이를 포함하는 터치 센서, 윈도우 적층체 및 화상 표시 장치
CN114360769B (zh) * 2022-03-21 2022-06-28 中化学科学技术研究有限公司 含银纳米线的透明导电膜用涂布液以及透明导电膜

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TWI566946B (zh) 2017-01-21
KR102220972B1 (ko) 2021-02-25
KR20160002196A (ko) 2016-01-07
CN106660338A (zh) 2017-05-10
JP6342021B2 (ja) 2018-06-13
CN106660338B (zh) 2018-09-11
TW201609415A (zh) 2016-03-16
JP2017518905A (ja) 2017-07-13

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