WO2013133451A1 - Stratifié pour une matière de base de film électro-conducteur, transparente - Google Patents

Stratifié pour une matière de base de film électro-conducteur, transparente Download PDF

Info

Publication number
WO2013133451A1
WO2013133451A1 PCT/JP2013/057108 JP2013057108W WO2013133451A1 WO 2013133451 A1 WO2013133451 A1 WO 2013133451A1 JP 2013057108 W JP2013057108 W JP 2013057108W WO 2013133451 A1 WO2013133451 A1 WO 2013133451A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
easy
mol
refractive index
adhesion layer
Prior art date
Application number
PCT/JP2013/057108
Other languages
English (en)
Japanese (ja)
Inventor
久雄 奥村
弘晃 辻
渡部　誉之
久保　耕司
俊雄 石寺
さと子 吉崎
Original Assignee
帝人デュポンフィルム株式会社
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 JP2012052909A external-priority patent/JP5908752B2/ja
Priority claimed from JP2012112505A external-priority patent/JP2013237800A/ja
Priority claimed from JP2012191484A external-priority patent/JP2014046570A/ja
Priority claimed from JP2012191482A external-priority patent/JP5960555B2/ja
Priority claimed from JP2012284407A external-priority patent/JP6082858B2/ja
Priority claimed from JP2012284406A external-priority patent/JP5981335B2/ja
Application filed by 帝人デュポンフィルム株式会社 filed Critical 帝人デュポンフィルム株式会社
Priority to KR1020147026853A priority Critical patent/KR102087006B1/ko
Priority to CN201380012824.4A priority patent/CN104159735B/zh
Publication of WO2013133451A1 publication Critical patent/WO2013133451A1/fr

Links

Classifications

    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present invention relates to a laminate used as a substrate of a transparent conductive film having a patterned transparent conductive layer that can be used as a sensor electrode of a projected capacitive touch panel.
  • a projected capacitive touch panel has been used as an input device for mobile devices such as mobile phones and smartphones.
  • the projected capacitive touch panel has rapidly increased in mobile devices due to its ease of use through intuitive operations such as the multi-touch function that allows multiple fingers to operate simultaneously and the gesture input function.
  • the capacitive touch panel has a configuration in which a capacitive touch sensor is arranged on a display device such as a liquid crystal display.
  • a capacitive touch sensor detects an electric field disturbance due to a capacitance of a human finger.
  • sensor base materials glass substrates and film substrates.
  • the film base sensors can be continuously produced by roll-to-roll and are relatively inexpensive to manufacture.
  • the capacitive touch sensor uses, as an electrode, a transparent conductive film having a transparent conductive layer patterned (patterned) into a thin line or a diamond shape for position detection. It is the structure which piled up facing each other. Patterning is performed by drawing a desired pattern by photolithography or screen printing, and then etching. At this time, there is a difference in the optical characteristics between the portion where the transparent conductive layer is present and the portion where the transparent conductive layer is removed. A so-called “bone appearance” phenomenon occurs in which the pattern of the conductive layer is visually recognized.
  • Patent Documents 1 to 10 In order to solve this problem of bone appearance, a so-called index matching technique is known in which an optical adjustment layer is formed by laminating thin films having different refractive indexes and the difference in optical characteristics is eliminated by utilizing the light interference effect.
  • Patent Documents 1 to 10 By the way, as a base material of a transparent conductive film used for a touch panel, a biaxially oriented polyester film, particularly a biaxially oriented polyethylene terephthalate film, which has an excellent balance between various properties such as heat resistance, mechanical properties, and optical properties and a price has been conventionally used. Have been used.
  • polyester films particularly uniaxial or biaxial stretched films of polyethylene terephthalate, are often used as various optical films such as protective films and antireflection films for flat panel displays in addition to the above-mentioned touch panel applications.
  • a functional layer such as a hard coat layer for suppressing the generation of scratches on the film surface or an antireflection layer for suppressing light reflection, the surface has an affinity as described above.
  • Patent Document 12 discloses that the easy-adhesion layer has a refractive index of 1.55 to 1.62 which is an intermediate between the refractive index of the stretched polyester film and the hard coat layer, and has a thickness of 50 to 150 nm. And a method of using a high glass transition temperature polyester having a 2,6-naphthalenedicarboxylic acid component and a low glass transition temperature polyester containing a trimellitic acid component as an easy-adhesion layer is described. .
  • Patent Document 13 discloses a method of providing an easy-adhesion layer mainly composed of a copolyester containing a naphthalenedicarboxylic acid component and a glycol component having a bisphenol A skeleton
  • Patent Document 14 discloses 2,6-naphthalene dicarboxylic acid.
  • a method has been proposed in which a copolyester containing an acid component and an ethylene oxide adduct component of bisphenolfluorene is contained as one component, and an easy adhesion layer having a thickness of 50 to 200 nm is provided.
  • an object of this invention is to provide the laminated body for transparent conductive film base materials which made the outstanding index matching characteristic and favorable adhesiveness compatible.
  • the present inventors applied an easy-adhesion layer that satisfies the following characteristics, thereby suppressing the influence of optical interference caused by the easy-adhesion layer and providing a good bone appearance suppression effect. At the same time, it was found that sufficient adhesion was obtained, and the present invention was completed. That is, the laminate of the present invention adopts the following configuration. 1.
  • the average refractive index in the plane direction of the polyester film is 1.60 to 1.70
  • the optical adjustment layer is composed of a high refractive index layer disposed on the first easy adhesion layer side and a low refractive index layer thereon, 2.
  • a transparent conductive film comprising a patterned transparent conductive layer having a refractive index of 1.9 to 2.3 on the optical adjustment layer in the laminate according to any one of 1 to 5 above. 7).
  • Copolyester (A1) 60-90 mol% of naphthalenedicarboxylic acid component, (B1) 0 to 40 mol% of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms, 0 to 50 mol% of the alkylene glycol component having 4 to 10 carbon atoms, and the total of the alkylene dicarboxylic acid component and the alkylene glycol component is 15 Copolyester containing ⁇ 50 mol% and (C1) 5 mol% or more and less than 20 mol% of a glycol component having a fluorene structure represented by the following formula (I).
  • Crosslinkable addition polymer (X1) containing 10 to 80 mol% of an addition polymerizable oxazoline group-containing monomer unit, (Y1) A crosslinkable addition polymer having an addition polymerizable polyalkylene oxide group-containing monomer unit content of 5 mol% or less. (The above mol% is a value based on 100 mol% of all monomer units of the crosslinkable addition polymer.) 9.
  • the copolymerized polyester further contains (F1) a dicarboxylic acid component having a sulfonate group in an amount of 0.1 to 5 mol%.
  • the laminated body of said 7 containing. 10.
  • the refractive index is 1.58 to 1.64 on the other surface
  • the swelling rate obtained by the following method is 130 to 200% in any solvent
  • the thickness is 50 to 100 nm.
  • UV curable composition Pentaerythritol acrylate: 45% by mass N-methylolacrylamide: 40% by mass N-vinylpyrrolidone: 10% by mass 1-hydroxycyclohexyl phenyl ketone: 5% by mass
  • the laminated body of this invention is the structure which laminated
  • the transparent conductive film of this invention is a structure which has the transparent conductive layer further patterned on the optical adjustment layer in the said laminated body.
  • each component constituting the present invention will be described.
  • the polyester constituting the polyester film is an aromatic dibasic acid or an ester-forming derivative thereof (which is an acid component in the polyester) and a diol or an ester-forming derivative thereof (which is a glycol component in the polyester).
  • polyesters include polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate, poly (1,4-cyclohexylenedimethylene terephthalate), and polyethylene-2,6-naphthalate. Further, these copolymers, blends thereof, or blends of these with a small proportion of other resins may be used. Among these polyesters, polyethylene terephthalate and polyethylene-2,6-naphthalate are preferable because of a good balance between mechanical properties and optical properties.
  • polyethylene terephthalate has a refractive index after biaxial stretching (average refractive index in the plane direction) close to 1.65, and thus the average refractive index in the plane direction of the polyester film is easily in the range of 1.60 to 1.70.
  • the refractive index adjustment with the optical adjustment layer in the invention is easy to perform, and thereby a better bone appearance suppressing effect can be obtained, which is preferable.
  • the polyester may be a homopolymer, but the copolymer component (copolymeric acid component or copolymer glycol component) does not impair its properties, for example, 5 mol% or less with respect to 100 mol% of the total acid component, Preferably, it may be a copolymer copolymerized at a ratio of 3 mol% or less.
  • the copolymer acid component include aromatic dicarboxylic acid components such as a phthalic acid component, an isophthalic acid component, and a 2,6-naphthalenedicarboxylic acid component, an adipic acid component, an azelaic acid component, a sebacic acid component, and 1,10-decane.
  • An aliphatic dicarboxylic acid component such as a dicarboxylic acid component can be exemplified, and examples of the copolymer glycol component include an aliphatic diol component such as a 1,4-butanediol component, a 1,6-hexanediol component, and a neopentyl glycol component, An alicyclic diol component such as 1,4-cyclohexanedimethanol component can be exemplified. These can also be used together. Further, as another copolymer component, a compound having two ester-forming functional groups in the molecule other than the above can be used.
  • Examples of such compounds include oxalic acid, dodecanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4,4′-diphenyldicarboxylic acid, phenylindanedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, tetralindicarboxylic acid, decalindicarboxylic acid.
  • Components derived from dicarboxylic acids such as diphenyl ether dicarboxylic acid, components derived from oxycarboxylic acids such as p-oxybenzoic acid and p-oxyethoxybenzoic acid, or propylene glycol, trimethylene glycol, tetramethylene glycol, hexamethylene Glycol, cyclohexanemethylene glycol, neopentyl glycol, ethylene oxide adduct of bisphenolsulfone, ethylene oxide adduct of bisphenol A, diethylene glycol, poly A component derived from a dihydric alcohol such as ethylene oxide glycol can be preferably used. These compounds may be used alone or in combination of two or more.
  • the acid component is preferably a component derived from 4,4′-diphenyldicarboxylic acid, 2,7-naphthalenedicarboxylic acid, or p-oxybenzoic acid, and the glycol component is trimethylene glycol.
  • the polyester constituting the polyester film is particularly preferably polyethylene terephthalate.
  • Such polyethylene terephthalate may have a copolymer component as described above, but preferably has an ethylene terephthalate unit of 90 mol% or more, preferably 95% or more, more preferably 97% or more.
  • the polyester in the present invention is a conventionally known method, for example, a method of directly obtaining a low-polymerization degree polyester by reaction of dicarboxylic acid and glycol, or a lower alkyl ester of dicarboxylic acid and glycol is a conventionally known transesterification catalyst. Obtained by a method in which a polymerization reaction is performed in the presence of a polymerization catalyst after reacting with one or more of compounds containing sodium, potassium, magnesium, calcium, zinc, strontium, titanium, zirconium, manganese, and cobalt. Can do.
  • antimony compounds such as antimony trioxide and antimony pentoxide, germanium compounds represented by germanium dioxide, tetraethyl titanate, tetrapropyl titanate, tetraphenyl titanate or a partial hydrolyzate thereof, titanyl ammonium oxalate , Titanium compounds such as potassium titanyl oxalate and titanium trisacetylacetonate can be used.
  • the polyester may be converted into chips after melt polymerization, and further subjected to solid phase polymerization under heating under reduced pressure or in an inert gas stream such as nitrogen.
  • the intrinsic viscosity of the polyester is preferably 0.40 dl / g or more, and more preferably 0.40 to 0.90 dl / g. If the intrinsic viscosity is less than 0.40 dl / g, process cutting may occur frequently. If it is higher than 0.9 dl / g, melt extrusion is difficult because of high melt viscosity, and the polymerization time is long and uneconomical.
  • the polyester film in the present invention preferably has an average refractive index in the plane direction of 1.60 to 1.70. Thereby, it is more excellent in a bone appearance suppression effect by the synergistic effect with the other layer which comprises the laminated body of this invention.
  • the average refractive index in the plane direction is an average refractive index between a refractive index in an arbitrary direction and a refractive index in a direction perpendicular to the refractive index in the film plane, preferably the maximum refractive index in the film plane and the maximum
  • the average refractive index of the refractive index in the direction perpendicular to the direction indicating the refractive index is shown. If the average refractive index in the plane direction is too low or too high, the effect of suppressing bone appearance is reduced. From this viewpoint, the range of the average refractive index in the plane direction of the polyester film is more preferably 1.62 or more, further preferably 1.63 or more, particularly preferably 1.64 or more, and most preferably 1.65 or more.
  • the average refractive index in the plane direction is in this range, as described later, when a functional layer such as a hard coat layer is provided on the surface opposite to the optical adjustment layer of the polyester film, the second easy-adhesion layer is provided.
  • the average refractive index in the plane direction is preferably 1.63 to 1.68, more preferably 1.64 to 1.67, and still more preferably 1.65 to 1.66.
  • Such a polyester film may be any of an unoriented film, a uniaxially oriented film, and a biaxially oriented film as long as the average refractive index in the plane direction satisfies the above requirements. From the viewpoint, a biaxially oriented film is preferable.
  • PET polyethylene terephthalate
  • PET polyethylene terephthalate
  • an oriented polyethylene terephthalate film is preferably used.
  • the polyester constituting the oriented polyethylene terephthalate film is a polyester having an ethylene terephthalate unit of 95 mol% or more, preferably 98 mol% or more, based on all repeating units, and particularly preferably a homopolyester not using a copolymer component in combination. It is.
  • a dicarboxylic acid component such as isophthalic acid or naphthalenedicarboxylic acid or a glycol component such as diethylene glycol, butanediol, or cyclohexanediol can be used as the copolymerization component.
  • the polyester film can contain a slippery filler such as inert particles in order to ensure transportability.
  • a capacitive touch sensor is formed by laminating a plurality of transparent films, and the haze of the film is integrated. Therefore, it is desired that the internal haze of each constituent film is as low as possible.
  • the polyester film preferably contains no filler or substantially no filler (for example, 10 ppm or less, preferably 1 ppm or less).
  • a small amount of filler may be included as a lubricant in order to prevent minute scratches in the manufacturing process and improve the film winding property.
  • the filler for example, inert particles having an average particle diameter of 0.01 to 2 ⁇ m, further 0.05 to 1 ⁇ m, and particularly 0.1 to 0.3 ⁇ m may be used.
  • the blending ratio is preferably 100 ppm or less, for example, based on the mass of the layer to be blended, and may be 10 ppm or less, particularly 1 ppm or less, which is a range that does not substantially contain.
  • the polyester film can also contain a colorant, an antistatic agent, an antioxidant, an organic lubricant, and a catalyst.
  • a polyester film having a first easy-adhesion layer and / or a second easy-adhesion layer described later may be referred to as a laminated polyester film.
  • refractive index of the first easy-adhesion layer it is important that the refractive index of the first easy-adhesion layer is in the range of 1.60 to 1.65.
  • the polyester film, the first easy-adhesion layer, and the optical adjustment layer preferably all have the same refractive index.
  • the refractive index of the first easy-adhesion layer is preferably 1.61 to 1.64, more preferably 1.62 to 1.64.
  • the difference between the refractive index of the first easy-adhesion layer and the refractive index of the high refractive index layer described later is preferably 0.05 or less. According to such an embodiment, the effect of improving bone appearance suppression can be increased.
  • the refractive index difference is more preferably 0.04 or less, and still more preferably 0.03 or less.
  • the difference of the refractive index of a 1st easily bonding layer and the surface direction average refractive index of a polyester film is 0.05 or less. According to such an embodiment, the effect of improving bone appearance suppression can be increased.
  • the refractive index difference is more preferably 0.04 or less, and still more preferably 0.03 or less.
  • the thickness of the first easy-adhesion layer is 8 to 30 nm. Thereby, it is excellent in adhesiveness. Moreover, while making the refractive index of a 1st easily bonding layer into the range mentioned above, and making thickness into the said range, there exists an outstanding bone-inhibition suppression effect by interaction with the other layer in the laminated body of this invention. be able to.
  • the optical interference of the thin film depends on the product of the refractive index and the optical path length (film thickness).
  • the optical adjustment layer or the high refractive index layer in the optical adjustment layer is in the refractive index range described later, and the first easy-adhesion layer is in the refractive index range.
  • the film thickness of the first easy-adhesion layer within a very narrow range of 8 to 30 nm, excellent adhesiveness can be obtained while exhibiting an excellent bone appearance suppressing effect. If the thickness of the first easy-adhesion layer is too thick, the effect of suppressing bone appearance is reduced. On the other hand, if it is too thin, the adhesiveness decreases.
  • the thickness of the first easy-adhesion layer is preferably 10 nm or more, more preferably 15 nm or more, still more preferably 18 nm or more, and preferably 25 nm or less, more preferably 22 nm or less.
  • the polyester resin occupies 50% by mass or more based on the mass of the first easy-adhesion layer. Thereby, it is excellent in adhesiveness.
  • the content of the polyester resin is preferably 70% by mass or more, and more preferably 80% by mass or more.
  • the upper limit of the content of the polyester resin in the first easy-adhesion layer is not particularly limited, but the polyester resin occupies the remaining part other than the components that can be preferably contained in the first easy-adhesion layer, which will be described later. What is necessary is just to be an aspect.
  • a polyester resin is used as a binder component which forms a 1st easily bonding layer
  • the glass transition temperature (Tg) of this polyester resin is 120 degrees C or less. Thereby, it is further excellent in adhesiveness. Moreover, it can be set as the 1st easily bonding layer excellent in extending
  • Tg is 40 degreeC, and this is further excellent in adhesiveness, and is excellent in blocking resistance. From this viewpoint, Tg is more preferably 50 ° C. or higher, and particularly preferably 60 ° C. or higher.
  • this polyester resin the polyester or copolymer polyester which consists of an acid component and a glycol component as shown below can be mentioned. In the present invention, a copolyester is preferable from the viewpoint of adhesiveness.
  • the monomer component which comprises the polyester concerning the following is illustrated, it is not limited to these.
  • Acid components include terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid, pyromellitic acid, dimer acid, Examples include components derived from 5-sodium sulfoisophthalic acid and the like. It is preferable to use two or more of these acid components as a copolyester. Further, an unsaturated polybasic acid component such as maleic acid, itaconic acid and the like, and hydroxycarboxylic acid such as p-hydroxybenzoic acid, etc., can also be used in a slight amount.
  • 2,6-naphthalenedicarboxylic acid is preferably used from the viewpoint of achieving a balance between the refractive index and the coating film strength.
  • content of 2, 6- naphthalene dicarboxylic acid in a polyester resin 50 mol% or more is preferable with respect to 100 mol% of all the acid components, and 60 mol% or more is more preferable.
  • 90 mol% or less is preferable, 80 mol% or less is more preferable, and 70 mol% or less is more preferable.
  • this component it exists in the tendency for the film forming property of a 1st easily bonding layer to fall.
  • glycol component examples include ethylene glycol, 1,4-butanediol, diethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, xylene glycol, dimethylolpropane, poly (ethylene oxide) glycol, poly The component derived from (tetramethylene oxide) glycol etc. can be mentioned. It is preferable to use two or more of these glycol components as a copolyester.
  • a fluorene structure represented by the following formula (I) such as bis (4-hydroxyethoxyphenyl) fluorene component is preferably used.
  • a compound having a conjugated system, such as a glycol component, is preferably used as the copolymer component.
  • R 2 , R 3 , R 4 And R 5 Are hydrogen, an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group, which may be the same or different.
  • a 2,6-naphthalenedicarboxylic acid component is adopted as the acid component, and at the same time, a glycol component having a fluorene structure, preferably a bis (4-hydroxyethoxyphenyl) fluorene component, is used as the glycol component.
  • the embodiment adopted is preferred. Thereby, it becomes easier to set the refractive index of the first easy-adhesion layer within the range defined by the present invention, and at the same time, the mechanical properties are excellent, and the effect of improving adhesiveness can be enhanced.
  • An embodiment in which these components are contained in the polyester resin at the above-described contents is preferable.
  • a copolymer polyester resin constituting a second easy-adhesion layer described later can be employed as a polyester resin constituting the first easy-adhesion layer in the present invention based on the above idea.
  • a copolymer polyester resin constituting a second easy-adhesion layer described later can be employed as a polyester resin constituting the first easy-adhesion layer in the present invention based on the above idea.
  • a particularly preferred embodiment of the polyester resin constituting the first easy-adhesion layer in the present invention is that the total acid component is 100 mol%, the acid component is 2,6-naphthalenedicarboxylic acid 60 to 70 mol%, and isophthalic acid 25 ⁇ 30 mol%, 5-sodium sulfoisophthalic acid is 5-10 mol%, glycol component is 10-20 mol% bisphenol A, ethylene glycol is 35-60 mol%, trimethylene glycol is 25-35 mol% %, And bis (4-hydroxyethoxyphenyl) fluorene consists of 5 to 10 mol%.
  • the polyester resin is preferably a polyester that is soluble or dispersible in water (which may contain some organic solvent), and it is easy to produce a coating liquid described later.
  • Metal oxide particles In order to control the refractive index of the first easy-adhesion layer in the present invention, metal oxide particles having a refractive index of 1.7 to 3.0, preferably 1.8 to 2.2 may be added. preferable.
  • TiO 2 (Refractive index 2.5), ZrO 2 (Refractive index 2.4), SnO 2 (Refractive index 2.0), Sb 2 O 3 (Refractive index 2.0) is exemplified, and in the present invention, it is preferable to use at least one metal oxide particle selected from the group consisting of these.
  • the metal oxide particles are colorless and transparent and have a particle size sufficiently small with respect to the wavelength of light. (For example, 400 nm or less, preferably 100 nm or less) is preferable.
  • a higher refractive index is preferable because the refractive index of the first easy-adhesion layer can be increased with a small amount, but high refractive index metal oxide particles having a refractive index exceeding 3.0 tend to be inferior in transparency.
  • the manufacturing cost tends to increase.
  • the metal oxide particles of the first easy-adhesion layer in the present invention particles made of titanium oxide and zirconium oxide are more preferable. From the viewpoint of specific gravity, titanium oxide particles having a high refractive index improving effect in a small amount. Particularly preferred.
  • the addition amount of the metal oxide particles is preferably 2% by mass or more and 20% by mass or less based on the mass of the first easy-adhesion layer, and the refractive index can be efficiently maintained while maintaining transparency by making such a range. Can be high. If the amount is too large, the transparency tends to decrease. In addition, particle dropping or the like tends to occur, equipment wear occurs during coating, and stable coating tends to be difficult.
  • the amount is more preferably 3% by mass or more, further 4% by mass or more, particularly preferably 5% by mass or more, more preferably 15% by mass or less, still more preferably 10% by mass or less, and further preferably 8% by mass or less. Is particularly preferred.
  • a high refractive index filler such as metal oxide particles
  • a method of increasing the refractive index of a polyester resin as a binder component means such as a method of adding a high refractive index filler such as metal oxide particles or a method of increasing the refractive index of a polyester resin as a binder component
  • the use of metal oxide particles has a problem of equipment wear and is relatively difficult to add in a large amount.
  • the 1st easily bonding layer in this invention contains the lubricant particle for providing lubricity other than the metal oxide particle of the said specific refractive index range.
  • lubricant particles By containing the lubricant particles, it is possible to impart lubricity and scratch resistance to the film.
  • lubricant particles include inorganic lubricant particles such as calcium carbonate, magnesium carbonate, calcium oxide, silicon oxide, sodium silicate, aluminum hydroxide, and carbon black, acrylic cross-linked polymers, styrene cross-linked polymers, and silicones.
  • organic lubricant particles such as resin, fluororesin, benzoguanamine resin, phenol resin, and nylon resin. These may be used alone or in combination of two or more.
  • the average particle diameter of the lubricant particles is preferably 10 to 180 nm, more preferably 20 to 150 nm.
  • the thickness of the first easy-adhesion layer of the present invention is very thin with respect to 80 to 120 nm which is the thickness of the easy-adhesion layer in a normal optical film. If it is smaller than 10 nm, sufficient lubricity and scratch resistance may not be obtained.
  • the content of the lubricant particles is preferably 0.1 to 10% by mass per 100% by mass of the first easy-adhesion layer. If it is less than 0.1% by mass, sufficient lubricity and scratch resistance cannot be obtained, and if it exceeds 10% by mass, the surface haze tends to increase, and the optical properties tend to deteriorate.
  • the crosslinking agent is preferably a compound having an oxazoline group and a polyalkylene oxide chain, more preferably an acrylic resin having an oxazoline group and a polyalkylene oxide chain, from the viewpoint of improving the coating film strength and further improving the adhesiveness.
  • An acrylic resin is preferable because it can easily copolymerize many kinds of functional groups.
  • the acrylic resin having an oxazoline group and a polyalkylene oxide chain is preferably an acrylic resin that is soluble or dispersible in water (may contain some organic solvent).
  • the acrylic resin having an oxazoline group and a polyalkylene oxide chain include those containing the following monomers as components.
  • the monomer having an oxazoline group include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline, Examples include 2-isopropenyl-4-methyl-2-oxazoline and 2-isopropenyl-5-methyl-2-oxazoline.
  • the component is preferably contained in the acrylic resin in an amount of 10 to 50 mol%, more preferably 20 to 40 mol%, and even more preferably 25 to 35 mol%. .
  • Examples of the monomer having a polyalkylene oxide chain include those obtained by adding polyalkylene oxide to an ester part of acrylic acid or methacrylic acid.
  • Examples of the polyalkylene oxide chain include polymethylene oxide, polyethylene oxide, polypropylene oxide, and polybutylene oxide.
  • the repeating unit of the polyalkylene oxide chain is preferably 3 to 100, more preferably 4 to 50, still more preferably 5 to 20. If the number of repeating units of the polyalkylene oxide chain is too small, the compatibility between the polyester resin and the acrylic resin tends to be poor, and the effect of improving the transparency of the first easy-adhesion layer tends to be low. On the other hand, if it is too large, the heat-and-moisture resistance of the first easy-adhesion layer tends to be low, and particularly the adhesiveness to the optical adjustment layer or the high refractive index layer tends to be low under high humidity and high temperature.
  • alkyl acrylate preferably methyl acrylate or ethyl acrylate
  • alkyl methacrylate preferably methyl methacrylate or ethyl methacrylate
  • the content of the cross-linking agent in the first easy-adhesive layer is preferably 1 to 20% by mass, more preferably 2 to 15% with respect to 100% by mass of the total amount of the polyester resin and the cross-linking agent in the first easy-adhesive layer. % By mass, more preferably 8 to 15% by mass.
  • the crosslinkable addition polymer which is a preferable crosslinking agent in the 2nd easily bonding layer mentioned later can be used as a crosslinking agent of a 1st easily bonding layer.
  • adopts a crosslinkable addition polymer in a 2nd easily bonding layer can be provided to a 1st easily bonding layer.
  • An optical adjustment layer is provided on the first easy-adhesion layer.
  • the optical adjustment layer is a layer that has a function of suppressing the appearance of bone by matching the light reflection and transmission characteristics of the portion where the transparent conductive layer is present and the portion where the transparent conductive layer is not present due to the interference effect.
  • the optical adjustment layer is usually composed of at least one high refractive index layer and at least one low refractive index layer, which are appropriately combined.
  • Each of the high refractive index layer and the low refractive index layer may have a plurality of layers. Usually, it becomes a lamination order of a polyester film, a high refractive index layer, and a low refractive index layer.
  • a high refractive index layer / low refractive index layer comprising a high refractive index layer on the side close to the polyester film and a low refractive index layer on the opposite side of the polyester film of the high refractive index layer.
  • An embodiment having a two-layer structure is preferable.
  • the high refractive index layer is a layer having a refractive index of 1.60 to 1.80. By setting it as such a refractive index range, it is excellent by the bone appearance suppression effect by interaction with the other layer in this invention. If the refractive index is too high or too low, the effect of suppressing bone appearance tends to be low. From such a viewpoint, the refractive index of the high refractive index layer is preferably 1.60 or more, more preferably 1.62 or more, still more preferably 1.64 or more, and preferably 1.75 or less, more preferably 1.70 or less, more preferably 1.68 or less, particularly preferably 1.66 or less.
  • the high refractive index layer is preferably a layer comprising a metal and / or metal oxide and optionally a binder resin. Especially, it is preferable that it is a layer which consists of a metal oxide and binder resin.
  • a metal oxide is a metal oxide film obtained by a sol-gel method.
  • the metal oxide film can be a high refractive index layer.
  • the metal oxide film may optionally contain a binder resin.
  • the metal oxide include metal oxide fine particles.
  • the metal oxide particles may include an embodiment in which the metal oxide particles are dispersed in the metal oxide film formed by the sol-gel method described above, or an embodiment in which the metal oxide particles are dispersed in the binder resin.
  • the type of metal oxide forming the film and fine particles in the high refractive index layer is not particularly limited as long as the above refractive index is satisfied, but the strength of the obtained film can be increased.
  • it should be at least one selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, zirconium oxide, indium-containing tin oxide, antimony-containing tin oxide and zinc antimonate. preferable.
  • titanium oxide, antimony-containing tin oxide, and zirconium oxide are particularly preferable from the viewpoints of particularly high film strength and excellent dispersibility in the case of fine particles.
  • These metal oxides may be used alone or in combination of two or more.
  • the metal oxide film which consists of 2 or more types of metal oxides may be sufficient, and the aspect containing 2 or more types of metal oxide fine particles may be sufficient.
  • the metal oxide forming the film and the metal oxide forming the fine particles may be the same or different.
  • the binder resin in the high refractive index layer include acrylic resins, urethane resins, melamine resins, alkyd resins, siloxane polymers, and organic silane condensates. Among them, those having a skeleton that has a high refractive index may be preferably used.
  • the binder resin is preferably formed by curing with heat, ultraviolet rays, electron beams or the like. Adhesiveness can be further improved by the binder resin.
  • a particularly preferable embodiment of the high refractive index layer in the present invention is an embodiment in which a binder resin is contained in the metal oxide film, and an organosilane condensate is particularly preferably contained in the titanium oxide film. It is an aspect. Commercially available products can also be used as metal oxides preferably used for the high refractive index layer.
  • zirconium oxide HXU-110JC (manufactured by Sumitomo Osaka Cement Co., Ltd.), titanium oxide: nanotech Ti-Tolu (Ci Kasei), zinc oxide: nanotech ZnO-Xylene (Ci Kasei), cerium oxide: Nidral (Taki Chemical) Indium-containing tin oxide: products manufactured by Mitsubishi Materials, antimony-containing tin oxide: SN-100D (manufactured by Ishihara Sangyo Co., Ltd.), zinc antimonate: Cellnax series (manufactured by Nissan Chemical Industries, Ltd.), etc. .
  • the low refractive index layer is a layer having a refractive index of 1.40 to 1.60. By setting it as such a refractive index range, it is excellent by the bone appearance suppression effect by interaction with the other layer in this invention. If the refractive index is too high or too low, the bone appearance suppression effect tends to be low. From this viewpoint, the refractive index of the low refractive index layer is preferably 1.42 or more, more preferably 1.43 or more, further preferably 1.44 or more, and preferably 1.55 or less, more preferably 1.50 or less, more preferably 1.48 or less.
  • the low refractive index layer is not particularly limited as long as it satisfies the above refractive index, and may be a layer made of a binder resin, a layer made of a metal oxide, or a binder resin and a metal. It may be a layer made of an oxide. In addition, organic particles having a low refractive index can be contained.
  • An example of the metal oxide is a metal oxide film obtained by a sol-gel method. In this case, the metal oxide film can be a low refractive index layer.
  • the metal oxide film may optionally contain a binder resin. Examples of the metal oxide include metal oxide fine particles.
  • the metal oxide particles may include an embodiment in which the metal oxide particles are dispersed in the metal oxide film formed by the sol-gel method described above, or an embodiment in which the metal oxide particles are dispersed in the binder resin.
  • the kind of metal oxide forming the film and fine particles in the low refractive index layer is particularly preferably silica from the viewpoint of forming a layer having a suitable low refractive index.
  • a more preferable low refractive index can be obtained by containing organic silane-based silicon compounds and low refractive index organic particles such as fluorine compounds as organic particles.
  • the refractive index can be lowered by forming voids by including a void forming agent in the layer.
  • the binder resin in the low refractive index layer examples include acrylic resins, urethane resins, melamine resins, alkyd resins, siloxane polymers, and organic silane condensates. Among them, those having a skeleton that has a low refractive index may be preferably used. From the viewpoint of film strength, the binder resin is preferably formed by curing with heat, ultraviolet rays, electron beams or the like.
  • a particularly preferable embodiment of the low refractive index layer in the present invention is an embodiment comprising a metal oxide film, and a silica film formed by a sol-gel method is particularly preferable.
  • the thickness is preferably 50 to 250 nm, more preferably 100 to 200 nm, and even more preferably 125 to 175 nm. Can be high.
  • the thickness is preferably 5 to 50 nm, more preferably 10 to 45 nm, and even more preferably 20 to 40 nm. Can be high.
  • the laminated body of this invention may have another layer in the range which does not inhibit the objective of this invention.
  • you may have the adhesion layer for bonding with another optical member in the surface on the opposite side to the optical adjustment layer of a polyester film.
  • a smoothing layer such as a hard coat layer may be provided on the first easy-adhesion layer, and an optical adjustment layer may be provided thereon.
  • the smoothing layer exhibits suitable adhesiveness for both the first easy-adhesion layer and the optical adjustment layer (or the high refractive index layer) in the present invention.
  • the second easy-adhesion layer is a layer for improving the adhesion between the polyester film and the functional layer when a functional layer such as a hard coat layer is laminated.
  • the second easy-adhesion layer is 70% by mass or more based on the weight of the second easy-adhesion layer, preferably 80% by mass or more, more preferably 85% by mass or more, and particularly preferably 90% by mass or more.
  • the ratio of the copolyester resin is 70% by mass or more, the adhesion with a functional layer such as a hard coat layer is improved, and the refractive index of the second easy-adhesion layer can be within an appropriate range. Therefore, light interference spots can be suppressed.
  • the glass transition temperature (Tg) of the second easy-adhesive layer is also in an appropriate range, and the film-forming property is improved, and the cracks of the second easy-adhesive layer are reduced, and the deterioration of the adhesiveness due to such cracks is suppressed. It can be excellent in adhesion.
  • the average refractive index in the plane direction of the oriented polyethylene terephthalate film is usually about 1.66, and the refractive index of the acrylic resin hard coat layer usually used as the functional layer is about 1.52.
  • the refractive index is preferably in the range of 1.57 to 1.62, more preferably in the range of 1.58 to 1.61, and particularly preferably in the range of 1.59 to 1.60. Such a refractive index can be easily achieved by employing a copolyester resin described later.
  • the thickness of the second easy-adhesion layer is preferably 50 to 100 nm, more preferably 70 to 90 nm.
  • the copolymer polyester resin used for the second easy-adhesion layer can be selected from the modes described below depending on the intended effect.
  • Such a copolyester resin can also be used as the polyester resin of the first easy-adhesion layer as long as the purpose is not hindered, whereby the effect of adopting such a copolyester resin is applied to the first easy-adhesion layer. Can be granted.
  • the first easy-adhesion layer and the second easy-adhesion layer may be collectively referred to as an easy-adhesion layer.
  • a so-called in-line coating method in which orientation crystallization is completed after coating a coating liquid for forming a coating layer on a polyester film before completion of orientation is applied. Often used.
  • in-line coating method in which orientation crystallization is completed after coating a coating liquid for forming a coating layer on a polyester film before completion of orientation is applied.
  • a so-called in-line coating method in which orientation crystallization is completed after coating a coating liquid for forming a coating layer on a polyester film before completion of orientation is applied.
  • it is presumed to be due to the cracking of the coating layer that occurs in the stretching process, but there may be cases where further improvement in adhesion is desired. found.
  • This aspect is a particularly suitable copolymer polyester resin for the purpose of excellent adhesion to a functional layer such as a hard coat layer and suppression of light interference spots (color spots) after the formation of the functional layer. It is an aspect.
  • the copolymerized polyester resin used in the second easy-adhesion layer of this embodiment has a naphthalenedicarboxylic acid component of 60 to 90 mol% and a carbon number of 6 to 6 on the basis of the total dicarboxylic acid component (100 mol%) of the copolymerized polyester.
  • a copolymer comprising 12 alkylene dicarboxylic acid components and 4 to 10 alkylene glycol components in a total amount of 15 to 50 mol%, and a glycol component having a fluorene structure represented by the formula (I) of 5 mol% or more and less than 20 mol%.
  • Polyester When the proportion of the naphthalenedicarboxylic acid component is in the above range, the refractive index of the copolyester can be increased, the refractive index of the second easy-adhesion layer can be easily set to the above-mentioned preferable range, Interference spots can be suppressed. Moreover, the swelling resistance of the second easily adhesive layer with respect to the solvent is also good.
  • the proportion of the naphthalenedicarboxylic acid component is less than the lower limit, the refractive index of the copolyester is lowered, and as a result, the refractive index of the second easy-adhesive layer is lowered and the effect of suppressing light interference spots is insufficient.
  • the swelling with organic solvents increases (solvent resistance deteriorates), so it swells when it comes into contact with the organic solvent in the coating liquid for functional layers such as the hard coat layer, resulting from the uneven thickness of the second easy-adhesive layer This is not preferable because it causes not only interference spots to occur but also blocking resistance.
  • the refractive index of the copolyester increases as the proportion of the naphthalenedicarboxylic acid component increases, the proportion of other components (for example, a crosslinking agent and other components described later) may be increased as the second easy-adhesion layer. it can.
  • the glass transition temperature (Tg) of the copolyester tends to be high and the glass transition temperature of the second easy-adhesion layer tends to be high. It tends to decrease.
  • the preferable lower limit of the content of the naphthalenedicarboxylic acid component is 65 mol%, and the preferable upper limit is 85 mol%, more preferably 80 mol%, and particularly preferably 70 mol%.
  • examples of the naphthalenedicarboxylic acid component include 2,7-naphthalenedicarboxylic acid component, 2,6-naphthalenedicarboxylic acid component, 1,4-naphthalenedicarboxylic acid component, and the like, among which 2,6-naphthalenedicarboxylic acid component.
  • Ingredients are preferred.
  • based on the total acid component of the copolyester it contains a total of 15 to 50 mol% of an alkylene dicarboxylic acid component having 6 to 12 carbon atoms and an alkylene glycol component having 4 to 10 carbon atoms.
  • the alkylene dicarboxylic acid component having 6 to 12 carbon atoms is contained in an amount of 0 to 40 mol% and the alkylene glycol component having 4 to 10 carbon atoms is contained in an amount of 0 to 50 mol%, and the alkylene dicarboxylic acid component and the alkylene glycol component are preferably contained.
  • the total content is 15 to 50 mol%.
  • Tg of copolyester can be made low and Tg of a 2nd easily bonding layer can be made low.
  • even the in-line coating method often adopted when forming the second easy-adhesion layer on the oriented polyethylene terephthalate film is excellent in the film-forming property of the second easy-adhesion layer.
  • the total amount of the alkylene dicarboxylic acid component and the alkylene glycol component is preferably in the range of 20 to 50 mol%.
  • alkylene dicarboxylic acid component having 6 to 12 carbon atoms examples include 1,4-butanedicarboxylic acid component, 1,6-hexanedicarboxylic acid component, Examples thereof include 1,4-cyclohexanedicarboxylic acid component, 1,8-octanedicarboxylic acid component, 1,10-decanedicarboxylic acid component, and the like.
  • a dicarboxylic acid component having an alkylene group having 4 to 8 carbon atoms is preferable, and a dicarboxylic acid component having an alkylene group having 4 to 6 carbon atoms is more preferable from the viewpoint that appropriate Tg is easily obtained.
  • the alkylene glycol component having 4 to 10 carbon atoms preferably used include a 1,4-butanediol component, a 1,6-hexanediol component, a 1,4-cyclohexanediol component, a 1,8-octanediol component, Examples include 1,10-decanediol component.
  • an alkylene glycol component having 4 to 8 carbon atoms is preferable, and an alkylene glycol component having 4 to 6 carbon atoms is more preferable from the viewpoint that appropriate Tg can be easily obtained.
  • the glycol component having the fluorene structure represented by the formula (I) is contained in an amount of 5 mol% or more and less than 20 mol% based on the total acid component of the copolymerized polyester, the Tg of the copolymerized polyester is appropriately low. While maintaining the temperature, the refractive index can be increased to a preferable range. When the content of the glycol component having the fluorene structure represented by the formula (I) is less than 5 mol%, it is difficult to make the refractive index of the copolymer polyester within a preferable range, and light interference spots cannot be suppressed. .
  • the preferred lower limit is 3 mol%, more preferably 5%, and the preferred upper limit is 15 mol%, more preferably 10%.
  • glycol component having a fluorene structure represented by the formula (I) preferably used examples include a 9,9-bis [4- (2-hydroxyethoxy) phenyl] fluorene component and a 9,9-bis [4- (2 -Hydroxyethoxy) -2-methylphenyl] fluorene component.
  • the copolymerized polyester of the second easy-adhesion layer in this embodiment described above contains 5 to 25 mol%, more preferably 10 to 20 mol%, of an ethylene oxide adduct component of bisphenol A in addition to the above components. It is preferable that Tg can be within a more preferable range while maintaining the refractive index, and the adhesiveness is also improved.
  • the average added mole number of ethylene oxide is suitably in the range of 2 to 4 moles with respect to 1 mole of bisphenol A.
  • terephthalic acid and / or isophthalic acid is contained in an amount of 20 to 40 mol%, particularly 24 to 34 mol%. It is preferable to contain.
  • an isophthalic acid component is preferable because it is easy to obtain a more suitable Tg.
  • the copolyester of this embodiment preferably contains 1 to 10 mol% of a dicarboxylic acid component having a sulfonate group based on the total acid component.
  • or water dispersibility can be improved.
  • the solvent resistance (swelling resistance) of the second easy-adhesion layer can be improved.
  • the amount is too large, the water resistance and blocking resistance of the second easy-adhesion layer tend to be low, so the range of 2 to 8 mol% is particularly preferable.
  • aromatic dicarboxylic acid component having a sulfonate group examples include a 5-sodium sulfoisophthalic acid component, a 5-potassium sulfoisophthalic acid component, a 5-lithium sulfoisophthalic acid component, and a 5-phosphonium sulfoisophthalic acid component.
  • the 5-sodium sulfoisophthalic acid component is most preferable from the viewpoint of improving water dispersibility. The following can be illustrated as a specific aspect of the copolyester resin 1 preferably used.
  • Naphthalene dicarboxylic acid component is 60 to 90 mol% (B2) 0 to 40 mol% of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms, 0 to 50 mol% of the alkylene glycol component having 4 to 10 carbon atoms, and the total of the alkylene dicarboxylic acid component and the alkylene glycol component being 15 ⁇ 50 mol% (C2) 5 mol% or more and less than 20 mol% of the glycol component having a fluorene structure represented by the formula (I), and (D2) 5-25 mol% of bisphenol A ethylene oxide adduct component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.)
  • Copolyester containing
  • Naphthalene dicarboxylic acid component is 60 to 80 mol% (B3) 15 to 50 mol% of an alkylene glycol component having 4 to 10 carbon atoms (C3) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (D3) 5-25 mol% of bisphenol A ethylene oxide adduct component (E3) 20-40 mol% of terephthalic acid component and / or isophthalic acid component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • Naphthalene dicarboxylic acid component is 60 to 80 mol% (B4) 15 to 50 mol% of an alkylene glycol component having 4 to 10 carbon atoms (C4) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (E4) 20-40 mol% of terephthalic acid component and / or isophthalic acid component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • Naphthalenedicarboxylic acid component is 60 to 70 mol% (B5) 15 to 50 mol% of an alkylene glycol component having 4 to 10 carbon atoms (C5) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (D5) 5-25 mol% of bisphenol A ethylene oxide adduct component (E5) 24 to 34 mol% of terephthalic acid component and / or isophthalic acid component (F5) 6-8 mol% of dicarboxylic acid component having a sulfonate group (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • the polyester film is preferably an oriented polyethylene terephthalate film, which may be a uniaxially oriented film or a biaxially oriented film, but the in-plane mechanical and thermal properties are uniform. From this point, a biaxially oriented film is preferable.
  • the average refractive index in the plane direction (in the film plane, the average refractive index between the refractive index in any one direction and the refractive index in the direction perpendicular thereto) is provided on the second easy-adhesive layer of this aspect.
  • a functional layer such as a hard coat layer is provided, the range of 1.6 to 1.7 is preferable from the viewpoint of suppressing the occurrence of light interference spots (color spots).
  • the second easy-adhesion layer of this aspect is, for example, the first easy-adhesion layer when the main purpose is excellent adhesion to a functional layer such as a hard coat layer and suppression of light interference spots after the functional layer is formed.
  • the second easy-adhesion layer can be provided on one or both sides of the polyester film to form a laminated polyester film.
  • Such a laminated polyester film includes the following embodiments. 1. A laminated polyester film having a second easy-adhesion layer on at least one surface of an oriented polyethylene terephthalate film, wherein the second easy-adhesion layer comprises 70% by mass or more of the following copolyester based on the mass of the second easy-adhesion layer. Contains laminated polyester film.
  • Copolyester (A1) 60-90 mol% of naphthalenedicarboxylic acid component, (B1) 0 to 40 mol% of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms, 0 to 50 mol% of the alkylene glycol component having 4 to 10 carbon atoms, and the total of the alkylene dicarboxylic acid component and the alkylene glycol component is 15 ⁇ 50 mol%, and (C1) A copolyester containing a glycol component having a fluorene structure represented by the formula (I) in an amount of 5 mol% to less than 20 mol%.
  • the copolyester is further (D2) 5-25 mol% of bisphenol A ethylene oxide adduct component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.)
  • the copolymerized polyester is (A3) The proportion containing a naphthalenedicarboxylic acid component is 60 to 80 mol%, (B3) the proportion of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms is 0 mol%, (E3) containing 20 to 40 mol% of terephthalic acid and / or isophthalic acid component, (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) 3. The laminated polyester film as described in 1 or 2 above. 4). 4.
  • Various solvents have come to be used as coating solutions for forming functional layers such as hard coat layers. Depending on the solvent, the easy-adhesion layer swells and dissolves, and the thickness varies, resulting in interference. There is a problem that the spots cannot be suppressed.
  • Such a copolyester uses, for example, a component capable of increasing the refractive index such as a naphthalenedicarboxylic acid component or a glycol component having a fluorene structure and a component capable of adjusting the swelling ratio such as an aromatic dicarboxylic acid component having a sulfonate group.
  • the refractive index and the swelling rate may be adjusted by adjusting the copolymerization amount.
  • the copolymer polyester preferably used include, for example, an aromatic dicarboxylic acid component having 60 to 90 mol% of a naphthalenedicarboxylic acid component and a sulfonate group based on the total dicarboxylic acid component (100 mol%) of the copolymer polyester.
  • Examples thereof include those containing 1 to 10 mol% and 5 to 25 mol% of bisphenol A ethylene oxide adduct.
  • the proportion of the naphthalenedicarboxylic acid component is in the above range, the refractive index of the copolyester can be increased, the refractive index of the second easy-adhesion layer can be easily set in the above range, and interference spots can be prevented. Can be suppressed. Further, the swelling ratio of the second easy-adhesion layer can be easily set within a preferable range.
  • the refractive index of the copolyester increases as the proportion of the naphthalenedicarboxylic acid component increases, the proportion of other components (for example, a crosslinking agent and other components described later) may be increased as the second easy-adhesion layer. it can.
  • the glass transition temperature (Tg) of the copolyester tends to be high and the glass transition temperature of the second easy-adhesion layer tends to be high.
  • the transparency of the film tends to decrease. Therefore, the content of the naphthalenedicarboxylic acid component is preferably 65 mol% or more, and 85 mol% or less, more preferably 80 mol% or less, and particularly preferably 70 mol% or less.
  • a preferable naphthalene dicarboxylic acid component it is the same as that of the copolyester resin 1.
  • the solubility or water dispersibility when the copolymer polyester is used as an aqueous coating liquid is improved. be able to.
  • the swelling ratio of the second easy-adhesion layer can be easily within a preferable range.
  • the content is preferably 2 to 8 mol%, particularly preferably 6 to 8 mol%.
  • the aromatic dicarboxylic acid component having a preferred sulfonate group is the same as the copolymer polyester resin 1. .
  • the Tg can be made a preferred range while maintaining the refractive index of the copolymer polyester,
  • the film forming property of the second easy-adhesion layer is improved, and a film excellent in transparency can be obtained.
  • the average added mole number of ethylene oxide is suitably in the range of 2 to 4 moles with respect to 1 mole of bisphenol A.
  • the copolymer polyester described above preferably contains 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) in addition to the above components.
  • the refractive index can be within a preferred range.
  • the refractive index of the copolyester tends to decrease, while when it increases, the Tg of the copolyester increases, and the film-forming property of the second easy-adhesive layer decreases and the transparency of the film is reduced. Tend to decrease, and the adhesiveness also tends to decrease.
  • the preferable lower limit is 5 mol%
  • the preferable upper limit is 15 mol%, and particularly preferably 10 mol%.
  • the glycol component having a fluorene structure represented by the formula (I) preferably used is the same as that of the copolyester resin 1.
  • the total amount of the components is 15 to 50 mol%.
  • Tg of copolyester can be made low and Tg of a 2nd easily bonding layer can be made low.
  • the polyester film is a polyethylene terephthalate film
  • even the in-line coating method often adopted when forming the second easy-adhesion layer is excellent in the film-forming property of the second easy-adhesion layer, so that the transparency is improved.
  • An excellent film is obtained.
  • the simultaneous biaxial stretching method is used and the in-line coating method is used to form the second easy-adhesion layer
  • the preheating / drying temperature tends to be relatively low. Largely preferred.
  • the adhesive improvement effect can be enhanced and the blocking resistance is also excellent.
  • the Tg of the copolyester is difficult to decrease, and the transparency of the resulting film may be reduced.
  • the amount of the alkylene dicarboxylic acid component or the alkylene glycol component is increased or the sum of both is increased, the anti-blocking property is reduced, or the refractive index of the copolyester is reduced and the effect of suppressing interference spots is reduced. There is a case.
  • the swelling rate of the second easy-adhesion layer may increase.
  • the total amount of the alkylene dicarboxylic acid component and the alkylene glycol component is preferably in the range of 20 to 50 mol%.
  • the alkylene dicarboxylic acid component having 6 to 12 carbon atoms (dicarboxylic acid component having an alkylene group having 4 to 10 carbon atoms) and the alkylene glycol component having 4 to 10 carbon atoms that are preferably used include copolymer polyester resin 1 It is the same.
  • the above-mentioned alkylene dicarboxylic acid component and the above-mentioned alkylene glycol can be easily added as an acid component and easily subjected to a polymerization reaction.
  • the components it is more preferable to contain them as an alkylene glycol component.
  • terephthalic acid and / or isophthalic acid is contained in an amount of 20 to 40 mol%, particularly 24 to 34 mol%. It is preferable to contain.
  • an isophthalic acid component is preferable because it is easy to obtain a more suitable Tg.
  • the following can be illustrated as a specific aspect of the copolyester resin 2 preferably used.
  • (Preferred Embodiment 1 of Copolyester Resin 2 (Preferred Embodiment 2-1)] (A) 60-90 mol% of naphthalenedicarboxylic acid component (B) 1 to 10 mol% of an aromatic dicarboxylic acid component having a sulfonate group, and (C) 5-25 mol% of bisphenol A ethylene oxide adduct component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • the refractive index of the second easy-adhesion layer in this embodiment is preferably 1.58 to 1.64. More preferably, it is 1.58 to 1.62, more preferably 1.58 to 1.60, and particularly preferably 1.58 to 1.59.
  • the refractive index of the second easy-adhesion layer is within this range, the average refractive index in the plane direction of a preferable polyester film, which will be described later, and the refractive index of a hard coat layer usually made of an acrylic resin (approximately 1.52) Since the refractive index is between, interference spots (color spots) when a hard coat layer made of such an acrylic resin is applied on the second easy-adhesion layer can be suppressed. If this refractive index is too high or too low, it becomes difficult to suppress interference spots. Moreover, it becomes easy to make a swelling rate into a preferable range by setting it as the 2nd easily bonding layer which consists of a component which becomes such a refractive index, Preferably the component mentioned above.
  • the refractive index of each component constituting the second easy-adhesion layer may be adjusted.
  • the refractive index of a 2nd easily bonding layer can be made high by using copolyester resin and particle
  • the above-described copolymer polyester resin 2 may be employed.
  • the thickness of the second easy-adhesion layer needs to be 50 to 100 nm, and preferably 70 to 90 nm.
  • the thickness of the second easy-adhesion layer By setting the thickness of the second easy-adhesion layer within this range, interference spots (color spots) when a low refractive index layer such as a hard coat layer made of an acrylic resin is provided thereon can be suppressed. If this thickness is too thin, the adhesiveness tends to decrease, and if it is too thin or too thick, it becomes difficult to suppress interference spots.
  • the swelling ratio obtained by the following method is 130 to 200% in any of the following solvents. Preferably it is 130 to 180%, more preferably 135 to 175%, still more preferably 139 to 165%.
  • UV curable composition methyl ethyl ketone (MEK), ethyl acetate, toluene, isopropanol (IPA) and propylene, which are representative of the solvents usually used for forming hard coat layers and the like, are used.
  • MEK methyl ethyl ketone
  • IPA isopropanol
  • propylene which are representative of the solvents usually used for forming hard coat layers and the like.
  • Glycol monomethyl ether acetate (PGMEA) is used, and in any of these solvents, the swelling ratio of the second easy-adhesion layer needs to be in the above range.
  • UV curable composition Pentaerythritol acrylate: 45% by mass N-methylolacrylamide: 40% by mass N-vinylpyrrolidone: 10% by mass 1-hydroxycyclohexyl phenyl ketone: 5% by mass
  • the swelling ratio is less than 130%, the adhesion with the hard coat layer tends to be low.
  • the swelling ratio exceeds 200%, the functional layer such as the hard coat layer is formed before and after the formation. Since the variation in the thickness of the second easy-adhesion layer is too large, it is difficult to suppress interference spots. Further, it is important that the swelling rate is within the above range in any of the above solvents.
  • the swelling rate in any of the solvents is out of this range, such a solvent is used to form a hard coat layer or the like. This is because when the functional layer is formed, the adhesiveness is insufficient or it is difficult to suppress interference spots.
  • the difference between the maximum swelling rate and the minimum swelling rate is 50% or less. It is preferable that it is 25% or less.
  • the components used for the second easy-adhesion layer, particularly the copolymer component constituting the binder component may be adjusted to balance the lipophilicity and the hydrophilicity.
  • the swelling rate can also be adjusted by using a crosslinking agent for the second easy-adhesion layer.
  • the crosslinking agent tends to have a lower swelling ratio as the addition amount increases.
  • the preferred polyester film according to this embodiment has a refractive index in the plane direction (average refractive index of a refractive index in any one direction and a refractive index in a direction perpendicular thereto in the film plane) of 1.63 to 1.68. Preferably, it is in the range of 1.64 to 1.67, particularly preferably 1.65 to 1.66.
  • the film provided with the second easy-adhesion layer using the above-described copolymer polyester resin 2 has a low refractive index layer such as a hard coat layer formed thereon. Excellent in suppressing the occurrence of interference spots. Even if the surface direction refractive index is out of the above range and is too high or too low, the effect of suppressing the occurrence of interference spots tends to decrease.
  • Such a polyester film may be any of an unoriented film, a uniaxially oriented film, and a biaxially oriented film as long as the plane direction refractive index satisfies the above requirements. To a biaxially oriented film.
  • the second easy-adhesion layer of this aspect is, for example, the first easy-adhesion layer when the main purpose is excellent adhesion to a functional layer such as a hard coat layer and suppression of light interference spots after the functional layer is formed.
  • the second easy-adhesion layer can be provided on one or both sides of the polyester film to form a laminated polyester film.
  • Such a laminated polyester film includes the following embodiments. 1. At least one surface of a polyester film having a surface direction refractive index of 1.63 to 1.68 has a refractive index of 1.58 to 1.64, and the swelling ratio required by the following method is 130 to 200% in any solvent, A laminated polyester film having a second easy adhesion layer having a thickness of 50 to 100 nm.
  • UV curable composition Pentaerythritol acrylate: 45% by mass N-methylolacrylamide: 40% by mass N-vinylpyrrolidone: 10% by mass 1-hydroxycyclohexyl phenyl ketone: 5% by mass 2.
  • Copolyester (A2) Naphthalenedicarboxylic acid component is 60 to 90 mol%, (B2) 1 to 10 mol% of an aromatic dicarboxylic acid component having a sulfonate group, and (C2) Copolyester containing 5 to 25 mol% of bisphenol A ethylene oxide adduct component. (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) 3.
  • the copolyester is further (D3) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) 3.
  • a so-called in-line coating method in which orientation crystallization is completed after coating a coating liquid for forming a coating layer on a polyester film before completion of orientation is applied.
  • in-line coating method in which orientation crystallization is completed after coating a coating liquid for forming a coating layer on a polyester film before completion of orientation is applied.
  • in-line coating method in which orientation crystallization is completed after coating a coating liquid for forming a coating layer on a polyester film before completion of orientation is applied.
  • the improvement of the adhesiveness (wet heat adhesiveness) especially in a wet heat environment is strongly requested
  • This aspect is particularly suitable for the purpose of, for example, excellent adhesion with a functional layer such as a hard coat layer in a humid heat environment, and suppression of light interference spots (color spots) after the formation of the functional layer.
  • a functional layer such as a hard coat layer in a humid heat environment
  • suppression of light interference spots (color spots) after the formation of the functional layer is an embodiment of a polymerized polyester resin.
  • the copolymerized polyester resin used in the second easy-adhesion layer of this embodiment has a naphthalenedicarboxylic acid component of 60 to 90 mol% and a carbon number of 6 to 6 on the basis of the total dicarboxylic acid component (100 mol%) of the copolymerized polyester.
  • the preferred embodiment and effect of the naphthalenedicarboxylic acid component are the same as those of the copolyester resin 1.
  • the preferable lower limit of the content of the naphthalene dicarboxylic acid component is 65 mol%, and the preferable upper limit is 85.
  • it contains a total of 15 to 50 mol% of an alkylene dicarboxylic acid component having 6 to 12 carbon atoms and an alkylene glycol component having 4 to 10 carbon atoms. Preferred embodiments and effects of such components are the same as those of the copolyester resin 1.
  • the content is preferably 0 to 39.9 mol% of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms.
  • an alkylene glycol component having 4 to 10 carbon atoms is contained in an amount of 0 to 50 mol%, and the total of the alkylene dicarboxylic acid component and the alkylene glycol component is 15 to 50 mol%. .
  • 5 mol% or more and less than 20 mol% of the glycol component which has the fluorene structure shown by said Formula (I) is included on the basis of all the acid components of copolyester.
  • the content of the dicarboxylic acid component having a sulfonate group is 0.1 to 5 mol% based on the total acid component.
  • the adhesiveness in a wet heat environment can be made high. If the amount is too large, the adhesiveness in a moist heat environment tends to be low, and the range of 0.1 to 4.5 mol% is particularly preferable.
  • the effect of dispersing or dissolving in a solvent tends to be reduced, and uniform coating tends to be difficult. Adhesiveness tends to be low.
  • the aromatic dicarboxylic acid component having a preferred sulfonate group is the same as the copolymer polyester resin 1.
  • the copolymerized polyester of the second easy-adhesion layer in this embodiment described above contains 5 to 25 mol%, more preferably 10 to 20 mol%, of an ethylene oxide adduct component of bisphenol A in addition to the above components. Preferably it is. Preferred embodiments and effects of such components are the same as those of the copolyester resin 1.
  • the Tg of the copolyester in order to keep the Tg of the copolyester in a more preferable range while maintaining the refractive index, 20 to 39.9 mol%, particularly 24 to 34, of terephthalic acid and / or isophthalic acid is used. It is preferable to contain mol%. Among these, an isophthalic acid component is preferable because it is easy to obtain a more suitable Tg.
  • the following can be illustrated as a specific aspect of the copolyester resin 3 preferably used.
  • Naphthalene dicarboxylic acid component is 60 to 90 mol% (B2) 0 to 39.9 mol% of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms, 0 to 50 mol% of the alkylene glycol component having 4 to 10 carbon atoms, and the total of the alkylene dicarboxylic acid component and the alkylene glycol component 15 to 50 mol% (C2) 5 mol% or more and less than 20 mol% of the glycol component having a fluorene structure represented by the formula (I) (D2) 5-25 mol% of bisphenol A ethylene oxide adduct component (F2) 0.1-5 mol% of dicarboxylic acid component having sulfonate group (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copo
  • Naphthalene dicarboxylic acid component is 60 to 80 mol% (B3) 15 to 50 mol% of an alkylene glycol component having 4 to 10 carbon atoms (C3) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (D3) 5-25 mol% of bisphenol A ethylene oxide adduct component (E3) 20 to 39.9 mol% of terephthalic acid component and / or isophthalic acid component (F3) 0.1-5 mol% of dicarboxylic acid component having a sulfonate group (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • Naphthalene dicarboxylic acid component is 60 to 80 mol% (B4) 15 to 50 mol% of an alkylene glycol component having 4 to 10 carbon atoms (C4) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (E4) 20 to 39.9 mol% of terephthalic acid component and / or isophthalic acid component (F4) 0.1-5 mol% of dicarboxylic acid component having a sulfonate group (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • Naphthalene dicarboxylic acid component is 60 to 75.9 mol% (B5) 15 to 50 mol% of an alkylene glycol component having 4 to 10 carbon atoms (C5) 5 mol% or more and less than 20 mol% of the glycol component having the fluorene structure represented by the formula (I) (D5) 5-25 mol% of bisphenol A ethylene oxide adduct component (E5) 20 to 39.9 mol% of terephthalic acid component and / or isophthalic acid component (F5) 0.1-5 mol% of dicarboxylic acid component having a sulfonate group (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) Copolyester containing.
  • the polyester film is preferably an oriented polyethylene terephthalate film, which may be a uniaxially oriented film or a biaxially oriented film, but the in-plane mechanical and thermal properties are uniform. From this point, a biaxially oriented film is preferable.
  • the average refractive index in the plane direction (in the film plane, the average refractive index between the refractive index in any one direction and the refractive index in the direction perpendicular thereto) is provided on the second easy-adhesive layer of this aspect.
  • a functional layer such as a hard coat layer is provided, the range of 1.6 to 1.7 is preferable from the viewpoint of suppressing the occurrence of light interference spots (color spots).
  • the second easy-adhesion layer of this aspect is, for example, excellent adhesiveness with a functional layer such as a hard coat layer in a moist heat environment and the suppression of light interference spots after the formation of the functional layer.
  • a 2nd easily bonding layer can be provided in the one or both surfaces of a polyester film, without having 1 easily bonding layer, and it can be set as a laminated polyester film.
  • Such a laminated polyester film includes the following embodiments. 1.
  • Copolyester (A1) 60-90 mol% of naphthalenedicarboxylic acid component, (B1) 15 to 50 mol% of the total of alkylene dicarboxylic acid component having 6 to 12 carbon atoms and alkylene glycol component having 4 to 10 carbon atoms, (C1) 5 mol% or more and less than 20 mol% of the glycol component having a fluorene structure represented by the formula (I), and (F1) Copolyester containing 0.1 to 5 mol% of a dicarboxylic acid component having a sulfonate group.
  • the copolyester is further (D2) 5-25 mol% of bisphenol A ethylene oxide adduct component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.)
  • the copolymerized polyester is (A3) The proportion containing a naphthalenedicarboxylic acid component is 60 to 80 mol%, (B3) the proportion of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms is 0 mol%, (E3) containing 20 to 39.9 mol% of terephthalic acid and / or isophthalic acid component, (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) 3. The laminated polyester film as described in 1 or 2 above. 4). 4.
  • the copolyester detailed above can be produced by a conventionally known polyester production technique.
  • an acid component such as 2,6-naphthalenedicarboxylic acid or an ester-forming derivative thereof, isophthalic acid or an ester-forming derivative thereof and 5-sodium sulfoisophthalic acid or an ester-forming derivative thereof is converted to tetramethylene glycol, 9,9- It reacts with diol components such as bis [4- (2-hydroxyethoxy) phenyl] fluorene and bisphenol A ethylene oxide adduct components to form monomers or oligomers, and then polycondensates under vacuum to obtain a predetermined intrinsic viscosity. It can be produced by a method of making a copolyester.
  • a catalyst for promoting the reaction for example, an esterification or transesterification catalyst or a polycondensation catalyst can be used, and various additives such as a stabilizer can be added.
  • the copolymerized polyester is applied to at least one surface of the film as a coating liquid, but since the in-line coating method applied when forming the film is preferable, the copolymerized polyester is preferably used as an aqueous dispersion.
  • the method for forming the aqueous dispersion is not particularly limited, and a conventionally known method may be adopted.
  • the copolyester used for the second easy-adhesion layer may contain an acid component or diol component other than those described above, and examples of the acid component include phthalic acid and phthalic anhydride.
  • examples of the diol component include ethylene glycol, diethylene glycol, dipropylene glycol, xylene glycol, and dimethylolpropane.
  • unsaturated acid components such as maleic acid and itaconic acid
  • polyfunctional acid components such as trimellitic acid and pyromellitic acid
  • polyfunctional hydroxy components such as glycerin and trimethylolpropane
  • poly (alkylene oxide) glycol components such as glycol and poly (tetramethylene oxide) glycol
  • the diol component is preferably an embodiment in which the above-mentioned essential or preferred diol component is contained in an essential or preferred content and the other diol component is an ethylene glycol component.
  • the range of preferable intrinsic viscosity (may be abbreviated as IV) of the copolyester of the second easy-adhesion layer is 0.2 to 0.8 dl / g, and the lower limit is further 0.3 dl / g, especially 0. .4 dl / g, and the upper limit is further preferably 0.7 dl / g, particularly preferably 0.6 dl / g.
  • the intrinsic viscosity is a value measured at 35 ° C. using orthochlorophenol.
  • the glass transition temperature (Tg) of the copolymerized polyester of the second easy-adhesion layer is 70 ° C.
  • the refractive index of the copolyester makes it easy to suppress light interference spots (color spot feeling) by setting the refractive index of the second easy-adhesive layer to the above-mentioned preferred range, so that it is 1.58-1. It is preferably in the range of 65, more preferably in the range of 1.60 to 1.63, and particularly preferably in the range of 1.61 to 1.62.
  • the above-described preferred copolyester resin embodiment may be employed.
  • a crosslinking agent in addition to the above-mentioned copolymerized polyester resin.
  • Preferred examples of the crosslinking agent include an epoxy crosslinking agent, an oxazoline crosslinking agent, a melamine crosslinking agent, and an isocyanate crosslinking agent, and these may be used alone or in combination of two or more. May be.
  • Examples of the epoxy-based crosslinking agent include polyepoxy compounds, diepoxy compounds, monoepoxy compounds, glycidylamine compounds, and the like.
  • Examples of the polyepoxy compounds include sorbitol polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythritol polyglycidyl ether.
  • oxazoline-based crosslinking agent a polymer containing an oxazoline group is preferable. It can be prepared by polymerization with addition polymerizable oxazoline group-containing monomers alone or with other monomers.
  • Addition polymerizable oxazoline group-containing monomers include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-2-oxazoline, 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-5-ethyl-2-oxazoline, and the like can be mentioned, and one or a mixture of two or more thereof can be used.
  • the other monomer may be any monomer that can be copolymerized with an addition-polymerizable oxazoline group-containing monomer.
  • alkyl acrylate, alkyl methacrylate (alkyl groups include methyl, ethyl, n-propyl, isopropyl, n (Meth) acrylic acid esters such as butyl group, isobutyl group, t-butyl group, 2-ethylhexyl group, cyclohexyl group); acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, styrene sulfone Unsaturated carboxylic acids such as acids and salts thereof (sodium salt, potassium salt, ammonium salt, tertiary amine salt, etc.); unsaturated nitriles such as acrylonitrile, methacrylonitrile; acrylamide, methacrylamide, N-alkylacrylamide, N-alkyl methacrylamide N, N-dialkylacrylamide, N, N-dialkyl methacrylate (alkyl groups include
  • a compound obtained by reacting methyl alcohol melamine derivative obtained by condensing melamine and formaldehyde with methyl alcohol, ethyl alcohol, isopropyl alcohol or the like as a lower alcohol and a mixture thereof are preferable.
  • the methylol melamine derivative include monomethylol melamine, dimethylol melamine, trimethylol melamine, tetramethylol melamine, pentamethylol melamine, hexamethylol melamine and the like.
  • isocyanate-based crosslinking agent examples include tolylene diisocyanate, diphenylmethane-4,4′-diisocyanate, metaxylylene diisocyanate, hexamethylene-1,6-diisocyanate, 1,6-diisocyanate hexane, tolylene diisocyanate and hexanetriol.
  • Adduct adduct of tolylene diisocyanate and trimethylolpropane, polyol-modified diphenylmethane-4,4'-diisocyanate, carbodiimide-modified diphenylmethane-4,4'-diisocyanate, isophorone diisocyanate, 1,5-naphthalene diisocyanate, 3,3 ' -Bitrylene-4,4 'diisocyanate, 3,3'dimethyldiphenylmethane-4,4'-diisocyanate, metaphenylene diisocyanate and the like.
  • oxazoline-based cross-linking agents are particularly preferred from the viewpoints of ease of handling, pot life of the coating liquid, and the like.
  • the solvent resistance (swelling resistance) and blocking resistance of the second easy-adhesive layer can be improved. Not only does the ratio decrease and the refractive index of the second easy-adhesive layer decreases, it becomes difficult to suppress light interference spots, but the second easy-adhesive layer tends to become harder and the adhesiveness tends to decrease.
  • the content of the crosslinking agent is preferably in the range of 1 to 30% by mass, particularly preferably in the range of 5 to 10% by mass per 100% by mass of the second easy-adhesive layer.
  • these cross-linking agents oxazoline-based cross-linking agents are particularly preferred from the viewpoints of ease of handling, pot life of the coating liquid, and the like.
  • the swelling rate with respect to the solvent of a 2nd easily bonding layer is easily made into a suitable value by containing the crosslinking agent concerning a 2nd easily bonding layer.
  • the amount is too large, the swelling rate tends to be too low and the adhesiveness tends to decrease.
  • the content of the crosslinking agent is 1 to 30% by mass per 100% by mass of the second easy-adhesive layer.
  • the range is preferably in the range of 5 to 10% by mass.
  • ⁇ Crosslinkable addition polymer> As described above, there is a strong demand for improving adhesiveness (wet heat adhesiveness) particularly in a wet heat environment.
  • This embodiment is a particularly suitable embodiment of a crosslinking agent for the purpose of excellent adhesion with a functional layer such as a hard coat layer in a wet heat environment. In a 2nd easily bonding layer, wet heat adhesiveness can be improved by employ
  • the second easy-adhesion eyebrows are prepared by adding the following cross-linkable addition polymer in addition to the above-mentioned copolymer polyester resin (particularly preferably copolymer polyester resin 1), based on the mass of the second easy-adhesion layer. It is preferable to contain ⁇ 30% by mass.
  • Crosslinkable addition polymer (X1) containing 10 to 80 mol% of an addition polymerizable oxazoline group-containing monomer unit, (Y1) A crosslinkable addition polymer having an addition polymerizable polyalkylene oxide group-containing monomer unit content of 5 mol% or less.
  • the above mol% is a value based on 100 mol% of all monomer units of the crosslinkable addition polymer.
  • Examples of the addition polymerizable oxazoline group-containing monomer constituting the addition polymerizable oxazoline group-containing monomer unit include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl- 2-oxazoline, 2-isopropenyl-2-oxazoline, 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-5-ethyl-2-oxazoline and the like can be mentioned. These 1 type, or 2 or more types of mixtures can also be used.
  • the addition polymerizable group for exhibiting the addition polymerization property is not particularly limited, but particularly from the viewpoint of further improving the adhesion with a functional layer such as a hard coat layer and from the viewpoint of easily obtaining the target compound.
  • Residues or methacrylic residues are preferred, that is, the monomer is preferably an oxazoline group-containing acrylic monomer or an oxazoline group-containing methacrylic monomer.
  • 2-isopropenyl-2-oxazoline is particularly preferable because it is easily available industrially.
  • the addition-polymerizable polyalkylene oxide group-containing monomer constituting the addition-polymerizable polyalkylene oxide group-containing monomer unit may have any addition-polymerizable group and polyalkylene oxide group, such as vinyl acetate, Preferable examples include vinyl esters such as those obtained by adding polyalkylene oxide to the ester portion of vinyl propionate, acrylic acid or methacrylic acid.
  • the alkylene group in the polyalkylene oxide group is, for example, one having 2 to 30 carbon atoms, preferably an alkylene group having 2 to 20 carbon atoms, more preferably 2 to 10 carbon atoms, and still more preferably.
  • the number of repeating alkylene groups in the polyalkylene oxide group (average) is, for example, 2 to 30, preferably 4 to 20, and more preferably 5 to 15. In the case of a polyalkylene oxide group comprising a plurality of types of alkylene groups, the total number of repetitions is preferably within the above range.
  • the crosslinkable addition polymer in the present invention contains 10-80 mol% of monomer units composed of the above addition polymerizable oxazoline group-containing monomer in the polymer with respect to 100 mol% of all monomer units of the polymer.
  • the content of the monomer unit composed of the addition-polymerizable polyalkylene oxide group-containing monomer as described above in the polymer is 5 mol% or less with respect to 100 mol% of all monomer units of the polymer. Is. By setting it as such a structure, the adhesiveness in a humid heat environment can be made high. If the content of the addition-polymerizable oxazoline group-containing monomer unit is too small, the adhesiveness in a moist heat environment is inferior. From this viewpoint, it is preferably 20 mol% or more, more preferably 30 mol% or more, still more preferably 40 mol% or more, and particularly preferably 50 mol% or more.
  • the amount is preferably 75 mol% or less, more preferably 70 mol% or less.
  • it is preferably 4 mol% or less, more preferably 3 mol% or less, and still more preferably 2 mol% or less.
  • it is an embodiment that does not contain addition-polymerizable polyalkylene oxide group-containing monomer units.
  • the crosslinkable addition polymer only needs to have a structure satisfying the requirements of the above (X1) and (Y1), and the other monomer units are addition polymerizable in a range that does not impair the purpose of this embodiment.
  • Any monomer unit may be used as long as it is composed of any addition polymerizable monomer capable of addition polymerization with an oxazoline group-containing monomer and an addition polymerizable polyalkylene oxide group-containing monomer.
  • Such optional addition polymerizable monomers include, for example, alkyl acrylate, alkyl methacrylate (alkyl groups include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, 2 (Meth) acrylic acid esters such as ethylhexyl group and cyclohexyl group); acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, styrenesulfonic acid and salts thereof (sodium salt, potassium salt, ammonium salt) Unsaturated nitriles such as acrylonitrile and methacrylonitrile; acrylamide, methacrylamide, N-alkylacrylamide, N-alkylmethacrylamide, N, N-dialkylacrylamide, N, N-dia Unsaturated amides such as kill methacrylate
  • the content of the crosslinkable addition polymer in the second easy-adhesive layer is preferably 1 to 30% by mass based on the mass of the second easy-adhesive layer.
  • the adhesiveness tends to decrease, and if it is less than the above lower limit, the adhesiveness in a moist heat environment is inferior.
  • the content of the crosslinkable addition polymer is more preferably 2% by mass or more, and further preferably 3% by mass or more.
  • the content is large, the refractive index of the second adhesive layer tends to be lowered. Therefore, when the upper limit is exceeded, the interference spots are inferior. From this viewpoint, it is more preferably 20% by mass or less, and still more preferably 10% by mass or less.
  • a crosslinking agent different from the above-mentioned crosslinkable addition polymer can be blended and used in combination in the second easy-adhesion layer within a range that does not impair the purpose of this embodiment.
  • a crosslinking agent an epoxy-type crosslinking agent, a melamine-type crosslinking agent, an isocyanate-type crosslinking agent, etc. can be illustrated, These may use 1 type and may use 2 or more types together.
  • the second easy-adhesion layer of the present embodiment adopting the above-mentioned crosslinkable polymer has excellent adhesiveness with a functional layer such as a hard coat layer in a moist heat environment, and suppression of light interference spots after the functional layer is formed.
  • the second easy-adhesion layer can be provided on one or both sides of the polyester film without having the first easy-adhesion layer to obtain a laminated polyester film.
  • a laminated polyester film includes the following embodiments. 1. A laminated polyester film having a second easy-adhesion layer on at least one surface of an oriented polyethylene terephthalate film, wherein the second easy-adhesion layer is 70% by mass or more of the following copolyester based on the mass of the second easy-adhesion layer, and A laminated polyester film containing 1 to 30% by mass of the following crosslinkable addition polymer.
  • Copolyester (A1) 60-90 mol% of naphthalenedicarboxylic acid component, (B1) 15 to 50 mol% in total of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms and the alkylene glycol component having 4 to 10 carbon atoms, and (C1) A copolyester containing a glycol component having a fluorene structure represented by the formula (I) in an amount of 5 mol% to less than 20 mol%.
  • Crosslinkable addition polymer (X1) containing 10 to 80 mol% of an addition polymerizable oxazoline group-containing monomer unit, (Y1) A crosslinkable addition polymer having an addition polymerizable polyalkylene oxide group-containing monomer unit content of 5 mol% or less. (The above mol% is a value based on 100 mol% of all monomer units of the crosslinkable addition polymer.) 2.
  • the copolyester is further (D2) 5-25 mol% of bisphenol A ethylene oxide adduct component (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.)
  • the copolymerized polyester is (A3) The proportion containing a naphthalenedicarboxylic acid component is 60 to 80 mol%, (B3) the proportion of the alkylene dicarboxylic acid component having 6 to 12 carbon atoms is 0 mol%, (E3) containing 20 to 40 mol% of terephthalic acid and / or isophthalic acid component, (However, the above mol% is a value with respect to 100 mol% of all dicarboxylic acid components of the copolyester.) 3. The laminated polyester film as described in 1 or 2 above. 4). 4. The laminated polyester film as described in any one of 1 to 3 above, which is used as an easily adhesive polyester film for optics.
  • ⁇ Other ingredients> can be blended in the second easy-adhesion layer of the present invention within a range not impairing the object of the present invention.
  • particles, waxes, surfactants, wetting modifiers, etc. may be added to improve film slipperiness, scratch resistance, wettability during coating, and other antistatic agents, UV absorbers, etc. Etc. may be blended.
  • particles may be any of organic particles, inorganic particles, and organic-inorganic composite particles. From the viewpoint of improving scratch resistance while maintaining transparency, large particles (particles), It is preferable to contain both small particles (small particles).
  • the average particle size of the large particles is suitably in the range of 80 to 1000 nm, more preferably in the range of 100 to 400 nm, and still more preferably in the range of 130 to 350 nm. Thereby, it is excellent in lubricity and scratch resistance.
  • a large particle is easy to drop
  • the content of the large particles in the second easy-adhesion layer is preferably 0.1 to 5% by mass, more preferably 0.1 to 1% by mass with respect to the mass of the second easy-adhesion layer. The effect of adding is easier to obtain.
  • the average particle size of the small particles is suitably in the range of 10 nm or more and less than 100 nm, more preferably 20 to 80 nm, still more preferably 30 to 60 nm. Thereby, it is excellent in blocking resistance.
  • the small particles are preferably inorganic particles, and are preferably metal oxide particles.
  • the metal oxide particles include silica particles, alumina particles, titania particles, and zirconia particles. Among these, silica particles and titania particles are preferable from the viewpoint of excellent cost.
  • the content of the small particles in the second easy-adhesion layer is preferably 0.1 to 5% by mass, more preferably 1 to 3% by mass with respect to the mass of the second easy-adhesion layer, and the small particles are added.
  • the effect is easier to obtain.
  • the second easy-adhesion layer can contain a surfactant.
  • a surfactant By containing a surfactant in the coating liquid for forming the second easy-adhesion layer, the coating properties of the coating liquid can be improved.
  • a surfactant is not particularly limited as long as it has an effect of enhancing the coating property to a polyethylene terephthalate film.
  • nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric interfaces. Any activator can be used.
  • nonionic surfactants are preferred from the viewpoint of particularly low foaming and good coatability.
  • Preferred examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, and polyoxyethylene propylene copolymer alkyl ether.
  • a surfactant it is preferable to use it in an amount of 20% by mass or less based on the mass of the second easy-adhesion layer. Thereby, there exists a tendency for the adhesive improvement effect to become high. From this viewpoint, it is more preferably 15% by mass or less, and further preferably 10% by mass or less.
  • the lower limit of the addition amount is preferably 1% by mass, more preferably 3% by mass or more, and further preferably 5% by mass or more from the viewpoint of the coating property described above.
  • ⁇ Method for producing polyester film> An example is given and demonstrated about the method for manufacturing the polyester film in this invention.
  • the polyester film in this invention is not limited to this.
  • the polyester film in the present invention is obtained by, for example, melt-extruding the above polyester into a film shape, cooling and solidifying with a casting drum to form an unstretched film, and this unstretched film is longitudinal (Tg + 60) ° C.
  • the magnification is 3 to 5 times in the width direction (the direction perpendicular to the film forming machine axis direction and the thickness direction, sometimes referred to as the transverse direction or TD) at Tg ⁇ (Tg + 60) ° C. It is obtained by stretching, and if necessary, heat treatment at 180-230 ° C.
  • the refractive index of the biaxially oriented polyester film can be adjusted by the draw ratio.
  • the higher the draw ratio the higher the refractive index.
  • the draw ratio is preferably in the range of 3.0 to 4.0 in the longitudinal direction and the width direction, more preferably 3.3 to 3. It is 8 times, more preferably 3.4 to 3.7 times.
  • the sequential biaxial stretching method as described above can be adopted, but the simultaneous biaxial stretching method can also be adopted.
  • the stretching conditions and the like are the same as those described above.
  • the coating liquid for forming the easy-adhesion layer is applied to the unstretched film.
  • the thickness of the polyester film used in the present invention is preferably in the range of 20 to 200 ⁇ m.
  • it can be appropriately selected according to the characteristics of the controller IC in order to ensure a predetermined capacitance.
  • the first easy-adhesion layer is coated with a coating liquid for forming the first easy-adhesion layer (hereinafter sometimes referred to as a first easy-adhesion coating liquid) on the polyester film, and is dried and necessary. It can form by hardening according to.
  • a coating liquid for forming the first easy-adhesion layer hereinafter sometimes referred to as a first easy-adhesion coating liquid
  • it is a so-called in-line coating method in which the first easy-adhesion coating liquid is applied during the production process of the polyester film to form the first easy-adhesion layer.
  • the adhesiveness of a polyester film and a 1st easily bonding layer can be made high. Even if the thickness of the first easy-adhesion layer is very thin, the thickness can be controlled with high accuracy.
  • the first easy-adhesive coating liquid can be obtained by mixing the components constituting the first easy-adhesive layer described above and diluting with a solvent as necessary.
  • each component may be added as it is, or may be added after dissolving or dispersing in an appropriate solvent, or may be diluted with an appropriate solvent.
  • the concentration of the coating liquid can be appropriately set depending on the viscosity of the coating liquid, the coating thickness, the coating method, and the like.
  • a conventionally well-known method can be employ
  • the high refractive index layer and the low refractive index layer can be formed by either a wet method or a dry method.
  • An optical adjustment layer is formed by forming a high refractive index layer on the first easy-adhesion layer or further forming a low refractive index layer on the high refractive index layer by any suitable method. do it.
  • a coating liquid for forming a high refractive index layer (hereinafter referred to as a high refractive index coating) is formed by a doctor method, a bar coater, a gravure roll coater, a curtain coater, a knife coater, a spin coater, a spray method, a dipping method, or the like.
  • a coating liquid for forming a low refractive index layer (hereinafter sometimes referred to as a low refractive index coating liquid) is applied to the surface on which the layer is to be formed.
  • the coating film is dried, and the coating film is dried and, if necessary, cured by heat, ultraviolet rays, an electron beam or the like, whereby a high refractive index layer and a low refractive index layer can be formed.
  • a coating solution may be a sol, whereby a metal oxide film is obtained.
  • the drying temperature is, for example, 50 to 100 ° C., preferably 60 to 90 ° C.
  • the irradiation intensity of ultraviolet rays or electron beams in curing for example, 100 to 2000 mJ / m 2 It is.
  • the solid content concentration of the coating liquid can also be appropriately selected depending on the intended coating amount and the coating method used. For example, it is 1 to 70% by mass.
  • a layer containing metal oxide fine particles in a binder resin, a layer made of a metal oxide film by a sol-gel method, a metal oxide film containing metal oxide particles, organic particles, and a binder resin It is suitable for forming the layer which carries out.
  • a PVD method such as a sputtering method, a vacuum deposition method, or an ion plating method, a printing method, a CVD method, or the like can be applied.
  • the dry method is suitable for forming a layer made of metal or a layer made of a metal oxide film.
  • a transparent conductive layer having a refractive index of 1.9 to 2.3 is formed on the optical adjustment layer of the laminate obtained above, in particular, on the low refractive index layer. Can be obtained.
  • the transparent conductive layer is not particularly limited as long as it is within the above refractive index range, and examples thereof include a layer made of a crystalline metal or a crystalline metal compound. Examples of the component constituting the transparent conductive layer include metal oxides such as silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, zinc oxide, indium oxide, and tin oxide.
  • a crystalline layer mainly composed of indium oxide is preferable, and a layer made of crystalline ITO (Indium Tin Oxide) is particularly preferably used.
  • the transparent conductive layer is a crystalline film, the environmental reliability required for the touch panel tends to be improved.
  • the crystallization method is not particularly limited, and for example, crystallization can be performed by heat treatment at 120 to 160 ° C. for about 60 to 90 minutes.
  • a layer made of a conductive polymer such as polyacetylene, polyparaphenylene, polythiophene, polyethylenedioxythiophene, polypyrrole, polyaniline, polyacene, polyphenylene vinylene, or the like can also be employed.
  • the film thickness of the transparent conductive layer is preferably 5 to 50 nm from the viewpoints of transparency and conductivity. More preferably, it is 5 to 30 nm.
  • the film thickness of the transparent conductive layer is less than 5 nm, the resistance stability with time tends to be inferior, and when it exceeds 50 nm, the surface resistance value tends to decrease. In addition, the color tone of the film becomes strong and the pattern tends to be emphasized.
  • the surface resistance value of the transparent conductive layer at a thickness of 10 to 30 nm is more preferably 100 to 1000 ⁇ / ⁇ , more preferably due to reduction of power consumption of the touch panel and circuit processing.
  • the transparent conductive layer can be formed by a known method.
  • a physical formation method such as a DC magnetron sputtering method, an RF magnetron sputtering method, an ion plating method, a vacuum deposition method, a pulse laser deposition method
  • PVD Physical Vapor Deposition
  • the transparent conductive layer in this invention is patterned.
  • patterning refers to an aspect in which a portion where the transparent conductive layer exists in a prescribed shape and a portion where the transparent conductive layer does not exist are formed. That is, the transparent conductive layer is formed on a part of the laminate of the present invention.
  • the specified shape may be a known shape that can be used as an electrode of a capacitive touch panel. For example, there are fine wire and tiremond patterns.
  • the patterning method is not particularly limited, and a conventionally known etching method can be used.
  • the second easy-adhesion layer is coated with a coating liquid for forming the second easy-adhesion layer (hereinafter sometimes referred to as a second easy-adhesion coating liquid) on the polyester film, and then dried. It can form by hardening according to.
  • a so-called in-line coating method is used in which the second easy-adhesion coating liquid is applied to form the second easy-adhesion layer during the production process of the polyester film.
  • the second easy-adhesion coating solution is applied to the surface opposite to the surface to which the first easy-adhesion coating solution is applied, and the first easy-adhesion layer and the second easy-adhesion layer are formed simultaneously.
  • a 2nd easily-adhesive coating liquid can mix and obtain the component which comprises the 2nd easily-adhesive layer mentioned above, and can obtain it by diluting with a solvent as needed.
  • each component may be added as it is, or may be added after dissolving or dispersing in an appropriate solvent, or may be diluted with an appropriate solvent.
  • the concentration of the coating liquid can be appropriately set depending on the viscosity of the coating liquid, the coating thickness, the coating method, and the like.
  • a conventionally well-known method can be employ
  • the second easy-adhesion layer can be formed before forming the first easy-adhesion layer.
  • a 2nd easily bonding layer can also be formed on both surfaces of a polyester film depending on the objective. The following is a description of a particularly preferable manufacturing method for forming the second easily adhesive layer in such a case.
  • the polyester film which has a 2nd easily bonding layer is manufactured through the film forming process which manufactures a biaxially-oriented polyester film, and the application
  • the film forming step may be a sequential biaxial stretching method or a simultaneous biaxial stretching method, but if it is a simultaneous biaxial stretching method, the film surface is hardly damaged during film formation, Since it is suitable for manufacturing the film used for an optical use, it is preferable.
  • the coating process may be after the film forming process (so-called off-line coating method) or in the film forming process (so-called in-line coating method). For example, a thin coating layer can be easily obtained uniformly, and a strong coating layer can be obtained. Furthermore, it is excellent in productivity.
  • the effect of improving the easy-adhesive property by improving the film-forming property is to be applied to the unstretched film or the partially oriented film before completion of the orientation.
  • the film forming method may be a sequential biaxial stretching method or a simultaneous biaxial stretching method.
  • the simultaneous biaxial stretching method the second easy-adhesive layer is used to stretch the biaxial simultaneously.
  • the embodiment using the above-described copolymer polyester resins 1 and 3 is particularly useful.
  • a preferable method when polyethylene terephthalate is used as the polyester and the in-line coating method is adopted by the simultaneous biaxial stretching method will be described.
  • sufficiently dried polyethylene terephthalate is melted at a temperature of Tm + 10 ° C. to Tm + 30 ° C. (where Tm is the melting point of polyethylene terephthalate), extruded into a sheet, and cooled with a cooling drum to form an unstretched film.
  • a coating solution for forming the second easy-adhesion layer is applied to the surface of the unstretched film on the side where the second easy-adhesion layer is to be formed by using a roll coater to obtain an unstretched film having a coating film.
  • coating is performed so that the thickness of the second easy-adhesion layer in the obtained film is preferably 50 to 100 nm, more preferably 70 to 90 nm.
  • this was preheated at 90 to 110 ° C., and simultaneously in the biaxial direction with a simultaneous biaxial stretching machine at a temperature of Tg to Tg + 70 ° C.
  • Tg is the glass transition temperature of polyethylene terephthalate
  • longitudinal direction or MD Preferably in the machine axis direction, longitudinal direction or MD) 2.5 to 5.0 times, more preferably 3.0 to 4.0 times, lateral direction (direction perpendicular to the film forming machine axis direction, width direction or TD) ) Is preferably 2.5 to 5.0 times, more preferably 3.0 to 4.0 times, and then heat-fixed at a temperature of (Tg + 60 ° C.) to Tm, preferably adjusting the heat shrinkage rate. Therefore, a laminated film having a second easy-adhesion layer on the oriented polyethylene terephthalate film can be obtained by heat relaxation treatment.
  • stretching temperature is 45 degreeC or more higher than the glass transition temperature of the copolyester in a 2nd easily bonding layer, More preferably, it is 50 degreeC or more, More preferably, it is 55 degreeC or more higher temperature. That is. Thereby, the film-forming property of the second easy-adhesion layer becomes more excellent, and the effect of improving the adhesiveness can be enhanced.
  • the temperature is preferably 40 ° C. or higher than the glass transition temperature of the second easy-adhesion layer, more preferably 45 ° C. or higher, and even more preferably 53 ° C. or higher. The film forming property of the easy-adhesion layer is more excellent, and the effect of improving the adhesiveness can be increased.
  • a polyethylene terephthalate film is preferably heat-set at a temperature in the range of 210 to 240 ° C. for 1 to 60 seconds.
  • the coating film is dried by the heat applied in the above process, and is cured as necessary to become a second easy-adhesion layer.
  • the coating liquid for forming a 2nd easily bonding layer mixes each component which comprises a 2nd easily bonding layer, and considers a viscosity, application
  • the solvent used for dilution is preferably water, that is, the coating liquid is preferably aqueous.
  • the solid concentration of the coating liquid is preferably 5 to 20% by mass, and a good coating appearance can be obtained.
  • ⁇ Characteristics of laminated film> (Haze) The laminated film of the present invention preferably has a haze value measured according to JIS standard K7136 of 0% or more and 1.0% or less, more preferably 0.1% or more and 0.8% or less, particularly preferably 0. .1% or more and 0.5% or less. Haze is an important evaluation index for use in optical applications.
  • haze is one of the indexes for evaluating the visibility of a display, and when haze exceeds 1.0%, Since the transparency of the film is lowered and the display screen of the display looks whitish, the contrast is lowered and the visibility may be lowered.
  • the haze within such a range, in the polyester film and the easy-adhesion layer, particles are not used or even when used, the diameter and amount are within the above-mentioned range, and the polymer binder constituting the easy-adhesion layer is the above-mentioned.
  • a preferable copolyester resin may be used.
  • Refractive index of the second easy adhesion layer The coating liquid for forming the second easy-adhesion layer was dried into a plate at 90 ° C. and measured with an Abbe refractometer (D-line 589 nm) to obtain the refractive index of the second easy-adhesion layer.
  • the longitudinal direction of the polyester film is 90 °
  • the width direction perpendicular to it is 0 °
  • the refractive index is measured every 5 °
  • the direction showing the maximum refractive index is specified
  • the refraction in the direction perpendicular to the direction is determined.
  • the average of these refractive indexes was taken as the average refractive index in the plane direction. This measurement method was used in the following examples and comparative examples. 2-2.
  • Average refractive index in the plane direction of polyester film 2 The refractive index of each of the obtained biaxially stretched polyester film in the longitudinal direction (MD), the width direction (TD), and the film thickness direction (Z direction) was measured with an Abbe refractometer.
  • the thickness of the easy-adhesion layer is thin, even if the easy-adhesion layer is formed on both sides, even if it is measured from above the easy-adhesion layer using an Abbe refractometer, it is affected by the refractive index of the easy-adhesion layer.
  • the refractive index of the biaxially oriented polyester film can be obtained.
  • Surface direction refractive index (longitudinal direction refractive index + width direction refractive index) / 2 This measurement method was used in the following Reference Examples and Reference Comparative Examples. (3) Refractive index of other layers and resin 3-1.
  • Refractive index of polyester resin of high refractive index layer, low refractive index layer, first easy adhesion layer Using a laser refractometer prism coupler, model 2010, manufactured by Metricon, the dried product of the coating liquid for forming each layer was measured using a wavelength of 633 nm. In addition, the dried product of the coating liquid for forming each layer was prepared by drying the coating liquid in an oven at 80 ° C. for 24 hours under normal pressure.
  • Refractive index of the copolyester resin of the second easy adhesion layer The solution or dispersion of the copolyester was dried into a plate at 90 ° C. and measured with an Abbe refractometer (D line 589 nm). (4) Film thickness 4-1.
  • Film thickness of first easy-adhesion layer, high refractive index layer, low refractive index layer, transparent conductive layer The film thickness of each layer was measured by observing the cross section of the film sample with a field emission type transmission electron microscope HF-3300 manufactured by Hitachi, Ltd. 4-2. Film thickness of the second easy adhesion layer The film is fixed with an embedding resin, the cross section is cut with a microtome, stained with 2% osmic acid at 60 ° C. for 2 hours, and the cross section is observed with a transmission electron microscope (JEM 2010 manufactured by JEOL). The thickness of the adhesive layer was measured. (5) Glass transition temperature 5-1. Glass transition temperature of copolyester.
  • the adhesion between the easy adhesion layer and the high refractive index layer was evaluated according to the following criteria. ⁇ : Peeling area is less than 20% ... good adhesion ⁇ : Peeling area of 20% or more and less than 50%: Adhesive strength is slightly good X: Peeling area is 50% or more ... adhesive strength failure 6-2. Pattern visibility (evaluation of bone appearance) In the transparent conductive film having the patterned transparent conductive layer, the boundary between the portion where the transparent conductive layer exists and the portion where the transparent conductive layer does not exist was visually observed, and the visibility was evaluated according to the following criteria. ⁇ : The border is hardly visible ⁇ : The border is slightly conspicuous ⁇ : The boundary looks prominent (7) Evaluation of the second easily adhesive layer 7-1.
  • Hard coat layer adhesion ((initial) adhesion) 1mm on the hard coat layer of the film on which the hard coat layer is formed 2 100 cross-cuts are put, cellophane tape (manufactured by Nichiban Co., Ltd.) is pasted on it, pressed firmly with fingers, peeled in the direction of 90 °, and evaluated as follows according to the number of remaining hard coat layers. went.
  • Hard coat layer adhesion (wet heat adhesion)
  • the film on which the hard coat layer was formed was immersed in 100 ° C. boiling water (ion-exchanged water) for 2 hours under normal pressure, and then evaluated for adhesiveness in the same manner as in 7-1 above. 7-3.
  • Swelling rate The thickness of the second easy adhesion layer of the film after laminating the hard coat layer was measured in the same manner as in 4-2 above.
  • Haze value of laminated film According to JIS K7136, the haze value of the film was measured using the haze measuring device (NDH-2000) by Nippon Denshoku Industries Co., Ltd. The irradiation surface was the second easily adhesive layer surface.
  • the aspect of the crack on the surface of the second easy-adhesive layer can be evaluated by the height of the haze. If the conditions are the same, the higher the haze (surface haze), the more surface cracks, and preferably It is 0.8% or less, more preferably 0.7% or less, further preferably 0.6% or less, and particularly preferably 0.5% or less.
  • Example 1-1 Manufacture of a polyester film having a first easy-adhesion layer
  • PET polyethylene terephthalate
  • the coating liquid A obtained by mixing so as to have the ratio shown as coating liquid A in Table 1-2 and diluting the coating liquid with ion-exchanged water so that the solid content concentration becomes 10% by mass is a gravure. It applied to one side using the roll coater. The coating thickness was adjusted to 15 nm after drying. Subsequently, the both ends of the film coated with the coating liquid were grasped with clips, preheated at 100 ° C.
  • a biaxially oriented polyester film having one easy adhesion layer was obtained.
  • the thickness of this polyester film was 125 ⁇ m.
  • the maximum refractive index in the surface direction was 1.66, the refractive index in the direction orthogonal to the direction showing the maximum refractive index was 1.64, and the average refractive index in the surface direction was 1.65.
  • a SiO2 sol obtained by dissolving tetraethylsilicate in ethanol, adding water and hydrochloric acid and hydrolyzing it is applied, heat-treated at 100 ° C. for 2 minutes, and having a thickness of 30 nm.
  • a gel film (refractive index 1.45)) was formed as a low refractive index layer.
  • an optical adjustment layer composed of two layers of a high refractive index layer and a low refractive index layer having different refractive indexes was formed, and a laminate was prepared.
  • ITO layer (refractive index 2.1) is formed on the low refractive index layer in the laminate by sputtering using an indium oxide-tin oxide target having a composition of indium oxide and tin oxide of 95: 5 by weight and a packing density of 98%. Formed. The film thickness of the formed ITO layer was 40 nm.
  • a photoresist patterned in stripes is applied and formed, dried and cured, and then immersed in 25 ° C., 5% hydrochloric acid (aqueous hydrogen chloride solution) for 1 minute. Etching of the ITO film was performed. Thereafter, the photoresist was removed. Further, heat treatment was performed at 150 ° C.
  • Example 1-2 to 1-4, Comparative Examples 1-1 to 1-4 A laminated body in the same manner as in Example 1 except that the coating liquid shown in Table 1-3 was used and the thickness of the first easy-adhesion layer was changed to the thickness shown in Table 1-3 by adjusting the wet coating amount. And the transparent conductive film was obtained.
  • the evaluation results are shown in Table 1-3. Below, the reference example which employ
  • this coated film was preheated at a temperature of 100 ° C., dried, and stretched simultaneously in the longitudinal and transverse directions at a magnification of 3.2 times in the longitudinal direction and 3.7 times in the transverse direction at 120 ° C. in a simultaneous biaxial stretching machine. And heat-fixed for 60 seconds to obtain a laminated polyester film having a second easy-adhesion layer on both sides of a 125 ⁇ m thick biaxially oriented polyethylene terephthalate film.
  • the characteristics of the obtained laminated polyester film are shown in Table 2-2.
  • a UV curable composition having the following composition was diluted with methyl ethyl ketone so as to have a solid content concentration of 40% by mass, It was applied using a Meyer bar, immediately dried at 70 ° C. for 1 minute, and cured by irradiating with ultraviolet rays for 30 seconds with a high-pressure mercury lamp having an intensity of 80 W / cm to form a hard coat layer. The count of the Meyer bar was adjusted so that the hard coat layer thickness after curing was 5 ⁇ m.
  • the UV curable composition in the reference example 2-1 mentioned above is methyl ethyl ketone (MEK), ethyl acetate, toluene, Prepare 5 types of solvents diluted with isopropanol (IPA) and propylene glycol monomethyl ether acetate (PGMEA) to a solid content concentration of 40% by mass, and apply each using a Meyer bar.
  • MEK methyl ethyl ketone
  • IPA isopropanol
  • PMEA propylene glycol monomethyl ether acetate
  • a hard coat layer was formed by irradiating with a high-pressure mercury lamp with an intensity of 80 W / cm for 30 seconds to cure with ultraviolet rays.
  • Tables 4-1 and 4-2 show the results of interference spots and adhesiveness of the hard coat film on which the hard coat layer was laminated.
  • adopted the copolyester resin 3 as a copolyester resin of a 2nd easily bonding layer is shown.
  • a roll coater is used so that the thickness of the second easy-adhesion layer obtained after stretching an aqueous coating liquid having a solid content of 10% by mass, comprising the composition shown in Tables 5-1 and 5-2, after stretching.
  • a laminated polyester film having a second easy-adhesion layer on both sides of a 125 ⁇ m-thick biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Reference Example 2-1, except that it was uniformly applied.
  • the characteristics of the obtained laminated polyester film are shown in Tables 5-1 and 5-2.
  • a hard coat layer was formed in the same manner as in Reference Example 2-1, using the obtained laminated film. The count of the Meyer bar was adjusted so that the hard coat layer thickness after curing was 5 ⁇ m.
  • Tables 5-1 and 5-2 show the results of interference spots and adhesiveness of the hard coat film on which the hard coat layer was laminated.
  • NDCA 2,6-naphthalenedicarboxylic acid component
  • TA terephthalic acid component
  • IA is isophthalic acid component
  • NSIA 5-sodium sulfoisophthalic acid component
  • C4G is tetramethylene glycol component
  • C8G is an octamethylene glycol component
  • BPA-4 is a bisphenol A ethylene oxide 4-mol adduct component (New Paul BPE-40) manufactured by Sanyo Chemical Industries
  • BPA-23P is a bisphenol A propylene oxide adduct manufactured by Sanyo Chemical Industries.
  • the component (Newpol BPE-23), BPEF means 9,9-bis [4- (2-hydroxyethoxy) phenyl] fluorene component, and EG means ethylene glycol.
  • oxazoline crosslinking agent trade name Epocross WS-700 manufactured by Nippon Shokubai Co., Ltd.
  • silica acrylic composite fine particles average particle diameter: 250 nm
  • Soriostar manufactured by Nippon Shokubai Co., Ltd.
  • silica filler 50 nm
  • lauryl ether trade name NAROACTY N-70, manufactured by Sanyo Chemical Industries, Ltd.
  • Examples 6-1 to 6-4 In the production of the polyester film of Example 1-1, when the coating liquid A for forming the first easy-adhesion layer is applied to one side of the film, the coating for forming the second easy-adhesion layer on the other side As a liquid, the thickness of the 2nd easily bonding layer obtained after extending
  • the laminated body and transparent conductive film used were obtained as Example 6-1.
  • the liquid was apply
  • Example 1-1 Evaluation which concerns on a 1st easily bonding layer was performed like Example 1-1. Moreover, about the obtained laminated body, evaluation which concerns on a 2nd easily bonding layer was performed like reference Example 2-2.
  • the hard coat layer was formed on the second easy adhesion layer in the same manner as in Reference Example 2-2. The evaluation results are shown in Table 6.
  • Examples 7-1 to 7-4 In the production of the polyester film of Example 1-1, when the coating liquid A for forming the first easy-adhesion layer is applied to one side of the film, the coating for forming the second easy-adhesion layer on the other side As the liquid, an aqueous coating liquid having a solid content of 10% by mass having the composition shown in the coating liquid 3-1 in Table 3-2 is obtained as the second obtained after stretching in the same manner as in Reference Example 3-1. Except for uniformly coating with a roll coater so that the thickness of the easy-adhesion layer is 70 nm, as in Example 1-1, the first easy-adhesion layer is provided on one side and the second easy-adhesion layer is provided on the other side.
  • a biaxially oriented polyester film, a laminate using the biaxially oriented polyester film, and a transparent conductive film were obtained as Example 7-1.
  • evaluation which concerns on a 1st easily bonding layer was performed like Example 1-1.
  • the evaluation which concerns on a 2nd easily bonding layer was performed about the obtained laminated body similarly to Reference Example 3-1.
  • Example 7 shows the evaluation results.
  • Examples 8-1 to 8-4 In the production of the polyester film of Example 1-1, when the coating liquid A for forming the first easy-adhesion layer is applied to one side of the film, the coating for forming the second easy-adhesion layer on the other side As a liquid, the thickness of the 2nd easily bonding layer obtained after extending
  • the laminated body and transparent conductive film used were obtained as Example 8-1.
  • the liquid was apply
  • Example 1-1 Evaluation which concerns on a 1st easily bonding layer was performed like Example 1-1. Moreover, the evaluation which concerns on a 2nd easily bonding layer was performed about the obtained laminated body similarly to Reference Example 4-2. In addition, the hard-coat layer was formed on the 2nd easily bonding layer like the reference example 4-2. The evaluation results are shown in Table 8.
  • Example 9-1 to 9-4 In the production of the polyester film of Example 1-1, when the coating liquid A for forming the first easy-adhesion layer is applied to one side of the film, the coating for forming the second easy-adhesion layer on the other side As a liquid, the thickness of the 2nd easily bonding layer obtained after extending
  • the laminated body and transparent conductive film used were obtained as Example 9-1.
  • the liquid was apply
  • Example 1-1 Evaluation which concerns on a 1st easily bonding layer was performed like Example 1-1. Moreover, the evaluation which concerns on a 2nd easily bonding layer was performed about the obtained laminated body similarly to Reference Example 5-1.
  • the hard coat layer was formed on the second easy adhesion layer in the same manner as in Reference Example 5-1. Table 9 shows the evaluation results.
  • the invention's effect ADVANTAGE OF THE INVENTION According to this invention, the laminated body for transparent conductive film base materials which made the outstanding index matching characteristic and favorable adhesiveness compatible can be provided.
  • the laminate of the present invention when adopted as a substrate of a transparent conductive film having a patterned transparent conductive layer, a good bone-inhibiting effect can be realized, and a polyester film and an optical adjustment layer Adhesiveness with (especially high refractive index layer) can be made excellent.
  • the laminated polyester film which is a preferred embodiment of the present invention is provided with an easy-adhesion layer using a specific copolymer polyester such as the above-described copolymer polyester resin 1, so that even an in-line coating which is usually employed is stretched.
  • the laminated film which is another preferred embodiment of the present invention, has the characteristics that the swelling ratio of the easy-adhesion layer is in a specific range, so that interference spots (color spots) hardly occur and the adhesiveness is excellent. Therefore, it can be suitably used as an easily adhesive film for optics.
  • the laminated polyester film which is another preferred embodiment of the present invention is provided with an easy-adhesion layer using a specific cross-linking agent such as a specific copolymer polyester and the above cross-linkable polymer, and is therefore usually used in-line. Even in coating, easy adhesion layer cracking in the stretching process is unlikely to occur, so it has excellent adhesion to functional layers such as hard coat layers, especially in wet and heat environments, and light interference spots (color spots) ) Is also unlikely to occur. Therefore, it can be particularly suitably used as an easily adhesive polyester film for optics.
  • the laminated polyester film which is another preferred embodiment of the present invention is provided with an easy-adhesion layer using a specific copolymerized polyester such as the above-described copolymerized polyester 3.
  • the stretching step Easy-to-adhesive layer cracking is unlikely to occur, so it has excellent adhesion to functional layers such as hard coat layers, especially in wet heat environments, and light interference spots (color spots) may also occur. It has the characteristics of wanting. Therefore, it can be particularly suitably used as an easily adhesive polyester film for optics.
  • the laminate of the present invention can be suitably used as a substrate for a transparent conductive film having a patterned transparent conductive layer. Thereby, the electrode by which the bone appearance was suppressed can be obtained and the electrostatic capacitance type touch panel excellent in visibility can be obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention a pour but de proposer un stratifié pour une matière de base de film électro-conducteur, transparente, offrant à la fois d'excellentes propriétés d'adaptation d'indice et une adhésivité favorable. La présente invention consiste en un stratifié pour une matière de base de film électro-conducteur transparente, le stratifié ayant une première couche facilement collée et une couche d'ajustement optique, dans l'ordre indiqué, sur au moins un côté d'un film de polyester, l la première couche facilement collée contenant 50 % en masse ou plus d'une résine de polyester sur la base de la masse de la première couche facilement collée, l'indice de réfraction étant de 1,60-1,65 et l'épaisseur étant de 8-30 nm.
PCT/JP2013/057108 2012-03-09 2013-03-07 Stratifié pour une matière de base de film électro-conducteur, transparente WO2013133451A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020147026853A KR102087006B1 (ko) 2012-03-09 2013-03-07 투명 도전성 필름 기재용 적층체
CN201380012824.4A CN104159735B (zh) 2012-03-09 2013-03-07 透明导电性薄膜基材用层压体

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP2012-052909 2012-03-09
JP2012052909A JP5908752B2 (ja) 2012-03-09 2012-03-09 透明導電性フィルム基材用積層体
JP2012-112505 2012-05-16
JP2012112505A JP2013237800A (ja) 2012-05-16 2012-05-16 積層ポリエステルフィルム
JP2012191484A JP2014046570A (ja) 2012-08-31 2012-08-31 積層ポリエステルフィルム
JP2012-191484 2012-08-31
JP2012191482A JP5960555B2 (ja) 2012-08-31 2012-08-31 積層フィルム
JP2012-191482 2012-08-31
JP2012284407A JP6082858B2 (ja) 2012-12-27 2012-12-27 積層ポリエステルフィルム
JP2012284406A JP5981335B2 (ja) 2012-12-27 2012-12-27 積層ポリエステルフィルム
JP2012-284406 2012-12-27
JP2012-284407 2012-12-27

Publications (1)

Publication Number Publication Date
WO2013133451A1 true WO2013133451A1 (fr) 2013-09-12

Family

ID=49116916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/057108 WO2013133451A1 (fr) 2012-03-09 2013-03-07 Stratifié pour une matière de base de film électro-conducteur, transparente

Country Status (4)

Country Link
KR (1) KR102087006B1 (fr)
CN (1) CN104159735B (fr)
TW (1) TWI649200B (fr)
WO (1) WO2013133451A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015152184A1 (fr) * 2014-03-31 2015-10-08 積水ナノコートテクノロジー株式会社 Film conducteur optiquement transparent et panneau tactile le comprenant
CN108350155A (zh) * 2015-10-28 2018-07-31 日本合成化学工业株式会社 聚酯系树脂、底漆用聚酯系树脂、聚酯系水性液、和带底漆层的基材薄膜以及层叠薄膜
WO2019130842A1 (fr) * 2017-12-28 2019-07-04 日東電工株式会社 Film conducteur transmettant la lumière, son procédé de production, film de commande de lumière et élément de commande de lumière
WO2019130841A1 (fr) * 2017-12-28 2019-07-04 日東電工株式会社 Film électroconducteur transmettant la lumière, son procédé de fabrication, film de commande de lumière et élément de commande de lumière
CN110744830A (zh) * 2019-10-17 2020-02-04 重庆金美新材料科技有限公司 一种高导电聚酯薄膜的制备方法
CN115103766A (zh) * 2020-02-20 2022-09-23 东洋纺株式会社 层叠薄膜

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112126343A (zh) * 2014-11-25 2020-12-25 Ppg工业俄亥俄公司 防眩触控屏显示器和其他经涂覆的制品和形成它们的方法
JP7305306B2 (ja) * 2018-03-30 2023-07-10 日東電工株式会社 円偏光板
CN111989618A (zh) * 2018-04-18 2020-11-24 三菱化学株式会社 干膜抗蚀剂用聚酯薄膜
CN113396179A (zh) * 2019-02-08 2021-09-14 东洋纺株式会社 聚酯薄膜及其用途
WO2020162120A1 (fr) 2019-02-08 2020-08-13 東洋紡株式会社 Écran pliable et équipement terminal portable
EP3978554A4 (fr) 2019-05-28 2023-06-21 Toyobo Co., Ltd. Film en polyester, film stratifié et utilisation associée
KR20220013564A (ko) * 2019-05-28 2022-02-04 도요보 가부시키가이샤 투명 도전성 폴리에스테르 필름과 그 용도
WO2020241278A1 (fr) 2019-05-28 2020-12-03 東洋紡株式会社 Film multicouche et son utilisation
WO2020241280A1 (fr) 2019-05-28 2020-12-03 東洋紡株式会社 Film de polyester et son application

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003020509A1 (fr) * 2001-09-03 2003-03-13 Teijin Limited Stratifie conducteur transparent
JP2007253512A (ja) * 2006-03-24 2007-10-04 Toray Ind Inc 光学用積層二軸延伸ポリエステルフィルム及びそれを用いたハードコートフィルム
JP2008169277A (ja) * 2007-01-10 2008-07-24 Teijin Dupont Films Japan Ltd 光学用易接着性ポリエステルフィルム
JP2009242461A (ja) * 2008-03-28 2009-10-22 Goo Chemical Co Ltd ポリエステル樹脂、ポリエステル水分散体及び被膜付きポリエステルフィルム
JP2010027294A (ja) * 2008-07-16 2010-02-04 Nitto Denko Corp 透明導電性フィルム及びタッチパネル
JP2010284943A (ja) * 2009-06-15 2010-12-24 Teijin Dupont Films Japan Ltd 光学用ポリエステルフィルム

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1595696B1 (fr) * 1998-05-15 2008-12-31 Toyo Boseki Kabushiki Kaisha Films transparents conducteurs et panneaux tactiles
JP2002155156A (ja) 2000-11-21 2002-05-28 Teijin Ltd 光学用易接着性積層フィルム
WO2006082944A1 (fr) * 2005-02-07 2006-08-10 Teijin Dupont Films Japan Limited Film multicouche conducteur
JP4667471B2 (ja) 2007-01-18 2011-04-13 日東電工株式会社 透明導電性フィルム、その製造方法及びそれを備えたタッチパネル
JP5099893B2 (ja) * 2007-10-22 2012-12-19 日東電工株式会社 透明導電性フィルム、その製造方法及びそれを備えたタッチパネル
JP4924381B2 (ja) 2007-11-22 2012-04-25 東洋紡績株式会社 被覆ポリエステルフィルム、およびそれを用いたハードコートフィルム
JP4966924B2 (ja) 2008-07-16 2012-07-04 日東電工株式会社 透明導電性フィルム、透明導電性積層体及びタッチパネル、並びに透明導電性フィルムの製造方法
CN102438831B (zh) * 2009-05-22 2015-08-05 东洋纺织株式会社 光学用易胶粘性聚酯膜
JP2011076932A (ja) 2009-09-30 2011-04-14 Nitto Denko Corp 透明導電性フィルム及びタッチパネル
JP5521535B2 (ja) 2009-12-22 2014-06-18 日油株式会社 透明導電性フィルム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003020509A1 (fr) * 2001-09-03 2003-03-13 Teijin Limited Stratifie conducteur transparent
JP2007253512A (ja) * 2006-03-24 2007-10-04 Toray Ind Inc 光学用積層二軸延伸ポリエステルフィルム及びそれを用いたハードコートフィルム
JP2008169277A (ja) * 2007-01-10 2008-07-24 Teijin Dupont Films Japan Ltd 光学用易接着性ポリエステルフィルム
JP2009242461A (ja) * 2008-03-28 2009-10-22 Goo Chemical Co Ltd ポリエステル樹脂、ポリエステル水分散体及び被膜付きポリエステルフィルム
JP2010027294A (ja) * 2008-07-16 2010-02-04 Nitto Denko Corp 透明導電性フィルム及びタッチパネル
JP2010284943A (ja) * 2009-06-15 2010-12-24 Teijin Dupont Films Japan Ltd 光学用ポリエステルフィルム

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015152184A1 (fr) * 2014-03-31 2015-10-08 積水ナノコートテクノロジー株式会社 Film conducteur optiquement transparent et panneau tactile le comprenant
JP2015201165A (ja) * 2014-03-31 2015-11-12 積水ナノコートテクノロジー株式会社 光透過性導電性フィルム及びそれを有するタッチパネル
CN108350155A (zh) * 2015-10-28 2018-07-31 日本合成化学工业株式会社 聚酯系树脂、底漆用聚酯系树脂、聚酯系水性液、和带底漆层的基材薄膜以及层叠薄膜
CN111527570A (zh) * 2017-12-28 2020-08-11 日东电工株式会社 透光性导电薄膜、其制造方法、调光薄膜、及调光构件
WO2019130841A1 (fr) * 2017-12-28 2019-07-04 日東電工株式会社 Film électroconducteur transmettant la lumière, son procédé de fabrication, film de commande de lumière et élément de commande de lumière
WO2019130842A1 (fr) * 2017-12-28 2019-07-04 日東電工株式会社 Film conducteur transmettant la lumière, son procédé de production, film de commande de lumière et élément de commande de lumière
KR20200098500A (ko) * 2017-12-28 2020-08-20 닛토덴코 가부시키가이샤 광 투과성 도전 필름, 그 제조 방법, 조광 필름, 및 조광 부재
CN111527570B (zh) * 2017-12-28 2022-06-14 日东电工株式会社 透光性导电薄膜、其制造方法、调光薄膜、及调光构件
KR102618094B1 (ko) 2017-12-28 2023-12-27 닛토덴코 가부시키가이샤 광 투과성 도전 필름, 그 제조 방법, 조광 필름, 및 조광 부재
CN110744830A (zh) * 2019-10-17 2020-02-04 重庆金美新材料科技有限公司 一种高导电聚酯薄膜的制备方法
CN110744830B (zh) * 2019-10-17 2022-03-15 重庆金美新材料科技有限公司 一种高导电聚酯薄膜的制备方法
CN115103766A (zh) * 2020-02-20 2022-09-23 东洋纺株式会社 层叠薄膜
CN115103766B (zh) * 2020-02-20 2023-12-15 东洋纺株式会社 层叠薄膜

Also Published As

Publication number Publication date
TWI649200B (zh) 2019-02-01
KR20140138775A (ko) 2014-12-04
TW201350330A (zh) 2013-12-16
CN104159735A (zh) 2014-11-19
KR102087006B1 (ko) 2020-03-10
CN104159735B (zh) 2017-03-22

Similar Documents

Publication Publication Date Title
TWI649200B (zh) 透明導電性薄膜基材用層合體
JP5363206B2 (ja) 光学用ポリエステルフィルム
JP4661946B2 (ja) 光学用易接着性ポリエステルフィルム及び光学用積層ポリエステルフィルム
JP4576808B2 (ja) 光学用積層フィルム、反射防止用積層フィルム、タッチパネル用積層フィルムおよびディスプレイ部材用積層フィルムの製造方法
JP6957885B2 (ja) 有機エレクトロルミネッセンス表示装置用フィルムおよび積層シート
US8778484B2 (en) Laminated polyester film and antireflection film
JP4096268B2 (ja) 透明導電性フィルム及びそれを用いたタッチパネル
JP5908752B2 (ja) 透明導電性フィルム基材用積層体
JP2013067164A (ja) 積層ポリエステルフィルム
JP6164075B2 (ja) 透明導電膜基材用塗布フィルム
JP4534608B2 (ja) 積層ポリエステルフィルムおよびそれを用いたディスプレイ用部材、ならびに積層ポリエステルフィルムの製造方法
JP6176270B2 (ja) 離型フィルム
JP5536716B2 (ja) 積層ポリエステルフィルム
JP5607520B2 (ja) 光学用ポリエステルフィルム
JP5489971B2 (ja) 積層ポリエステルフィルム
JP2008168487A (ja) 光学用易接着ポリエステルフィルム
JP3942460B2 (ja) Ｉｔｏ膜用易接着性ポリエステルフィルム
JP2014046570A (ja) 積層ポリエステルフィルム
WO2012081438A1 (fr) Film de polyester feuilleté
JP5734405B2 (ja) 積層ポリエステルフィルム
JP5981335B2 (ja) 積層ポリエステルフィルム
JP6082858B2 (ja) 積層ポリエステルフィルム
JP5489972B2 (ja) 積層ポリエステルフィルム
JP5960555B2 (ja) 積層フィルム
JP5364140B2 (ja) 積層ポリエステルフィルム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13758515

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20147026853

Country of ref document: KR

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 13758515

Country of ref document: EP

Kind code of ref document: A1