JP2002155158A - Easily bondable laminated film for optical use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily bondable laminated film for optical use which is excellent in bondability, clarity, and slipperiness. SOLUTION: This laminated film has a wax-containing coating layer formed on at least one side thereof and has a haze value of 1% or lower. The coefficient of friction (μs) on the surface of the coating layer is 0.8 or lower.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optically-adhesive laminated film for optical use, and more particularly, to an excellent adhesive film in which an easily-adhesive coating film made of a specific composition is formed on at least one surface of a polyester film. The present invention relates to an optically-adhesive laminated film having optical properties, transparency and lubricity.

[0002]

2. Description of the Related Art Polyester films, especially biaxially stretched films of polyethylene terephthalate and polyethylene naphthalate, have excellent mechanical properties, heat resistance and chemical resistance, and are therefore magnetic tapes, ferromagnetic thin tapes, photographic films, packaging. Films for electronic parts, films for electronic parts, electric insulating films, films for laminating metal plates, films to be pasted on the surface of glass displays, films for protecting various members, and the like.

In recent years, polyester films have been widely used for various optics. For example, base films such as prism lens sheets for liquid crystal display devices, touch panels and backlights, base films for antireflection films, and display explosion proofs. It is used as a base film of a film for preventing shattering of glass when a CRT is imploded. A base film used for such an optical application is required to have excellent transparency and excellent adhesion to a prism lens, a hard coat layer, a pressure-sensitive adhesive layer, an antireflection treatment layer, and the like.

[0004]

The polyester film generally has poor adhesion to other materials such as a prism lens mainly composed of an acrylic resin and a hard coat layer.
For this improvement, it has been proposed to laminate an easy-adhesion layer using a polyester resin, an acrylic resin, a urethane resin, or the like on the surface of a polyester film (for example, JP-A-10-119215, JP-A-2000-2000). 246
No. 855, etc.). However, the easy-adhesion layer according to these proposals may have insufficient adhesive strength depending on the application, for example,
CRT films have problems such as insufficient adhesion to the hard coat layer but insufficient adhesion to the pressure-sensitive adhesive layer on the opposite side.

[0005] On the other hand, a filler (lubricating agent) is usually added to the polyester film in order to improve the sliding property (easy sliding property). However, since a polyester film for a substrate for optical use requires transparency, It is necessary to minimize the amount of filler added. However, if the amount of filler added is small, the film surface is flat,
When the films are wound into a roll or overlapped, the films are stuck together, and when the films are taken out of the roll, there is a problem that the stuck portion becomes a surface defect of the film. In addition, since the sliding properties between the films are poor, the handling properties are poor, and there is a problem that the film surface is damaged in the film forming and processing steps. These problems become particularly remarkable when a resin having a low glass transition point is used for the easily adhesive layer in order to improve the adhesive strength of the polyester film.

An object of the present invention is to solve the problems of the prior art and to provide a laminated film having excellent adhesion to functional layers used for various optical applications, and excellent transparency and lubricity. Aim.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, formed an easily adhesive coating film containing wax on the surface of a polyester film.
The inventors have found that a lamination film having a haze value of 1% or less and a coefficient of friction (μs) of the coating film surface of 0.8 or less can solve the above problems, and have completed the present invention.

That is, the present invention provides (1) a laminated film having a haze value of 1% or less, wherein a coating layer containing wax is formed on at least one surface of a polyester film,
The optically-adhesive laminated film for optical use, wherein the friction coefficient (μs) of the coating layer surface is 0.8 or less.

In a preferred embodiment of the present invention, (2) the wax is one or two selected from the group consisting of carnauba wax, paraffin wax and polyethylene wax.
It is an optically-adhesive laminated film according to (1), which is at least one kind. Further, (3) wax is contained in the coating layer in an amount of 0.5 to 2 mm.
(1) the optically-adhesive laminated film according to (1), which is contained in a range of 0% by weight; and (4) the optically-adhesive property as described in (1), wherein the coating layer contains a polyester resin and an acrylic resin. Laminated film, (5) polyester film is polyethylene terephthalate and / or polyethylene-2,
(1), (2), (3) mainly composed of 6-naphthalate
Or it is an easily adhesive laminated film for optics as described in (4).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

(Polyester) In the present invention, the polyester constituting the polyester film is a linear saturated polyester synthesized from an aromatic dibasic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof.

Specific examples of such polyesters include polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate, poly (1,4-cyclohexylene dimethylene terephthalate), polyethylene-2,6-naphthalate, and the like. Or a blend of these with a small proportion of another resin. Of these,
Polyethylene terephthalate, polyethylene-2,6-
Naphthalate is particularly preferred because it has a good balance of mechanical properties and optical properties.

[0013] These polyesters can be blended with an appropriate filler as required. As the filler, those conventionally known as a slipperiness imparting agent for polyester films can be used. For example, calcium carbonate, calcium oxide, aluminum oxide, kaolin, silicon oxide, zinc oxide, carbon black, silicon carbide , Tin oxide, crosslinked acrylic resin particles, crosslinked polystyrene resin particles, melamine resin particles, crosslinked silicone resin particles, and the like. In addition, polyester has colorants, antistatic agents, antioxidants, organic lubricants,
A catalyst or the like can be appropriately added.

(Polyester film) The polyester film in the present invention is, for example, a melt extruded polyester film, and is cooled and solidified by a casting drum to form an unstretched film.
The film is stretched once or twice or more in the longitudinal direction at a temperature of (Tg + 60) ° C. so that the total magnification becomes 3 to 6 times, and then at a temperature of Tg to (Tg + 60) ° C., the width becomes 3 to 5 times. And heat-treated at 180 to 230 ° C. for 1 to 60 seconds as needed.
It can be obtained by performing a re-heat treatment while shrinking 0 to 20% in the width direction at a temperature lower by 0 ° C.

The thickness of the polyester film used in the present invention is preferably in the range of 25 to 300 μm.
The upper limit of the film thickness is more preferably 250 μm, and the lower limit is more preferably 50 μm. When the film thickness is in the above range, the strength is preferable when the polyester film is used as a support for hard coating, a touch panel, an anti-glare treatment or the like.

(Wax) The wax used as a component in the coating layer in the present invention is, for example, carnauba wax, candelilla wax, rice wax, wood wax, jojoba oil, palm wax, rosin-modified wax, ouriculi wax, sugarcane wax. , Vegetable waxes such as esparto wax, bark wax, animal waxes such as beeswax, lanolin, whale wax, ibota wax, shellac wax, mineral waxes such as montan wax, ozokerite, ceresin wax, paraffin wax, microcrystalline wax, Synthetic hydrocarbons such as petroleum wax such as petrolactam, Fischer-Tropsch wax, polyethylene wax, polyethylene oxide wax, polypropylene wax, and polypropylene oxide wax It is a wax and the like.

Of these waxes, carnauba wax, paraffin wax, and polyethylene wax are particularly preferred because of their good adhesion to the hard coat layer and the pressure-sensitive adhesive layer and the good lubricity of the laminated film. . Further, an aqueous dispersion is more preferable in view of environmental problems and ease of handling.

In the present invention, the content of the wax in the coating layer is preferably in the range of 0.5 to 20% by weight.
More preferably, the lower limit of the wax content is 1% by weight and the upper limit is 10% by weight. 0.5% by weight
If it is less than the above, lubricity of the film surface may not be obtained. On the other hand, if it exceeds 20% by weight, the adhesion of the coating layer to the polyester substrate and the easy adhesion to the hard coat layer, the pressure-sensitive adhesive layer and the like may be insufficient.

(Resin Component in Coating Layer) In the present invention,
The main components constituting the coating layer include polyester resin, acrylic resin, acrylic-modified polyester resin, polyurethane resin, polysiloxane resin, epoxy resin, polyether resin, vinyl resin and the like. Further, a polyester resin and an acrylic resin are preferable from the viewpoint of adhesiveness, and a polyester resin and an acrylic resin are more preferable.

(Polyester Resin) Examples of the polyester resin include polyester polymers or copolymers comprising a polybasic acid component and a polyol component as shown below. Incidentally, the components of the polyester resin are not limited to these monomers.

The polybasic acid component includes terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, 2,6-
Naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid,
Examples thereof include pyromellitic acid, dimer acid, and 5-sodium sulfoisophthalic acid. These acid components are
It is preferable to use at least one kind as a copolymerized polyester. It is also possible to use a small amount of an unsaturated polybasic acid component such as maleic acid, itaconic acid or the like and hydroxycarboxylic acid such as p-hydroxybenzoic acid.

The polyol component includes ethylene glycol, 1,4-butanediol, diethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, xylene glycol, dimethylolpropane, poly ( Examples thereof include ethylene oxide) glycol and poly (tetramethylene oxide) glycol.

(Acrylic Resin) The acrylic resin used as a component of the coating layer in the present invention can be obtained by polymerizing, preferably copolymerizing the following acrylic monomers. The components of the acrylic resin are not limited to these monomers.

Examples of the acrylic monomer include alkyl acrylate and alkyl methacrylate (alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl,
-Ethylhexyl group, cyclohexyl group, etc.); 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2
Hydroxy-containing monomers such as hydroxypropyl methacrylate; epoxy-containing monomers such as glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether; acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, styrene sulfonic acid and salts thereof (Sodium salt, potassium salt, ammonium salt, tertiary amine salt, etc.) and other monomers containing a carboxy group or a salt thereof; acrylamide, methacrylamide, N-alkylacrylamide, N-alkylmethacrylamide, N, N-dialkyl Acrylamide, N, N-dialkyl methacrylate (as the alkyl group, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, 2-ethylhexyl Group, a cyclohexyl group, etc.), N
-Alkoxyacrylamide, N-alkoxymethacrylamide, N, N-dialkoxyacrylamide, N,
N-dialkoxy methacrylamide (alkoxy groups include methoxy, ethoxy, butoxy, isobutoxy, etc.), acryloylmorpholine, N-methylolacrylamide, N-methylolmethacrylamide, N
And monomers having an amide group such as -phenylacrylamide and N-phenylmethacrylamide.

Further, maleic anhydride,
Monomers of acid anhydrides such as itaconic anhydride; vinyl isocyanate, allyl isocyanate, styrene, α-methylstyrene, vinyl methyl ether, vinyl ethyl ether, vinyl trialkoxysilane, alkyl maleic acid monoester, alkyl fumaric acid monoester, alkyl Monomers such as itaconic acid monoester, acrylonitrile, methacrylonitrile, vinylidene chloride, ethylene, propylene, vinyl chloride, vinyl acetate, and butadiene can be used.

(Coating Layer) The polyester resin forming the coating layer is preferably contained at 50 to 95% by weight in the coating layer. The upper limit of the proportion of the polyester resin in the coating layer is more preferably 90% by weight, and the lower limit is more preferably 60% by weight. The acrylic resin forming the coating layer is preferably contained in the coating layer in an amount of 5 to 30% by weight. The upper limit of the proportion of the acrylic resin in the coating layer is more preferably 25% by weight, and the lower limit is more preferably 10% by weight. 9 polyester resin
If the content exceeds 5% by weight or the content of the acrylic resin is less than 5% by weight, the adhesiveness may be insufficient. If the acrylic resin exceeds 30% by weight, the acrylic resin is not compatible with the polyester resin, and thus the transparency may be deteriorated.

The components forming the coating layer are wax,
A polyester resin and an acrylic resin alone may be used, and a component other than wax, a polyester resin, and an acrylic resin may be blended. For example, when the coating layer contains 0.5% by weight of wax, 50% by weight of polyester resin, and 30% by weight of acrylic resin, the other components are added in an amount of 1%.
9.5% by weight can be blended. Other components include, for example, resins other than polyester resins and acrylic resins, polymers having an oxazoline group, crosslinking agents such as melamine, epoxy and aziridine, antistatic agents, coloring agents, surfactants, ultraviolet absorbers, lubricants ( Filler).

(Laminated Film) The easily adhesive laminated film of the present invention has a haze value of 1% or less and a friction coefficient (μs) of 0.8 or less on the surface of the coating layer. Line average roughness (Ra) is 0.002 to 0.01 μm
Is preferably within the range. The optically easy-adhesive laminated film of the present invention having such properties, on at least one side of the polyester film, select a composition that satisfies the properties of the laminate from among the above compositions, and apply a coating liquid containing these. It can be obtained by coating and forming a coating film.

(Coating Liquid) In the present invention, the coating liquid used to form the coating layer is preferably used in the form of an aqueous coating liquid such as an aqueous solution, an aqueous dispersion or an emulsion. In the coating liquid, if necessary, other resins other than the composition, for example, a polymer having an oxazoline group, a crosslinking agent such as melamine, epoxy, and aziridine, an antistatic agent, a coloring agent, a surfactant, and an ultraviolet absorber Agents, lubricants (fillers) and the like can be added. By adding a lubricant, the lubrication and blocking resistance of the laminated film can be further improved.

The solid content of the aqueous coating solution is usually 20% by weight.
Or less, more preferably 1 to 10% by weight. If this proportion is less than 1% by weight, the coatability on the polyester film may be insufficient, while if it exceeds 20% by weight, the stability of the coating and the appearance of the applied coating may be deteriorated.

(Application of Coating Solution) The application of the aqueous coating solution to the polyester film can be carried out at any stage, but is preferably carried out during the production process of the polyester film. It is preferable to apply it to a polyester film before performing.

Here, the polyester film before the completion of the crystal orientation includes an unstretched film, a uniaxially stretched film obtained by stretching the unstretched film in either the longitudinal direction or the transverse direction, or a biaxial film in the longitudinal and transverse directions. Biaxially stretched film that has been stretched at a low magnification in the direction (a biaxially stretched film before finally being re-stretched in the machine direction or the transverse direction to complete the orientation crystallization).

Among them, it is preferable to apply an aqueous coating solution of the above composition to an unstretched film or a uniaxially stretched film which is oriented in one direction, and then perform longitudinal stretching and / or transverse stretching and heat fixing as it is.

When the aqueous coating solution is applied to the film, the film surface may be subjected to a physical treatment such as a corona surface treatment, a flame treatment, a plasma treatment or the like as a preliminary treatment for improving the coatability, or may be applied together with the composition. It is preferable to use a surfactant which is chemically inactive.

Such a surfactant promotes the wetting of the aqueous coating liquid on the polyester film.
Anionic or nonionic surfactants such as polyoxyethylene alkyl phenyl ether, polyoxyethylene-fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, fatty acid metal soap, alkyl sulfate, alkyl sulfonate, alkyl sulfosuccinate, etc. Can be mentioned. The surfactant is preferably contained in the composition for forming a coating film in an amount of 1 to 10% by weight.

The coating amount of the coating solution is such that the thickness of the coating film is 0.02 to 0.02.
The amount is preferably 0.3 μm, and more preferably 0.07 to 0.25 μm. If the thickness of the coating film is too thin, the adhesive strength may be insufficient, while if it is too thick, blocking may occur or the haze value may increase.

As a coating method, any known coating method can be applied. For example, a roll coating method, a gravure coating method, a roll brushing method, a spray coating method, an air knife coating method, an impregnation method, a curtain coating method, or the like can be used alone or in combination. Note that the coating film may be formed on only one side of the film or on both sides as necessary.

[0038]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. In Examples and Comparative Examples, the haze value, the coefficient of friction (μs), the surface roughness (Ra), the adhesiveness, and the blocking resistance were evaluated by the following methods.

(1) Haze value The haze value of the film was measured using a haze measuring device (NDH-20) manufactured by Nippon Denshoku Industries Co., Ltd. The haze of the film was evaluated according to the following criteria. ◎: haze value ≦ 0.5%: very good haze of the film ○: 0.5% <haze value ≦ 1.0%: good haze of the film ×: 1.0% <haze value: haze of the film Bad

(2) Center line average surface roughness (Ra) According to JIS B0601, using a high-precision surface roughness meter SE-3FAT manufactured by Kosaka Laboratory Co., Ltd.
μm, a load of 30 mg, a magnification of 200,000 times, a chart of 0.08 mm cut-off condition, and draw a portion of the measurement length L from the surface roughness curve in the direction of its center line,
When the roughness curve was represented by Y = f (x) with the center line of the extracted portion as the X axis, the direction of the longitudinal magnification and the Y axis, the value given by the following equation was expressed in nm. In this measurement, four samples were measured with the reference length set to 1.25 mm, and expressed as an average value.

[0041]

(Equation 1)

(3) Coefficient of friction (μs) The coefficient of static friction between the coated surface and the polyethylene terephthalate film (non-coated surface) using a slippery measuring device manufactured by Toyo Tester Co., Ltd. in accordance with ASTM D1894-63. (Μs) was measured. However, the thread plate was a glass plate, and the load was 1 kg. In addition, the slipperiness of the film was evaluated based on the following criteria. ◎: Coefficient of friction (μs) ≦ 0.5: extremely good slippage ○: 0.5 <friction coefficient (μs) ≦ 0.8: good slippage ×: 0.8 <coefficient of friction (μs) Poor slipperiness

(4) Adhesion Hard Coat A hard coat layer having a thickness of 10 μm is formed on the coating film forming surface of the easily adhesive laminated film, and a cross cut (1 m
100 squares of m2), and a cellophane tape (manufactured by Nichiban) having a width of 24 mm was stuck thereon.
After sharply peeling at a peel angle of °, the peeled surface was observed and evaluated according to the following criteria. 5: Peeling area is less than 10% ... Excellent adhesive strength 4: Peeling area is 10% or more and less than 20% ... Good adhesive strength 3: Peeling area is 20% or more and less than 30% ... Slightly good 2: Peeling The area is 30% or more and less than 40% ...... Poor adhesion 1: The peeling area exceeds 40% ... The adhesion is extremely poor.

Adhesive (PSA) An adhesive (PSA) layer having a thickness of 20 μm is formed on the coating film forming surface of the easy-adhesive laminated film, and the adhesive layer surface is affixed to the float glass at 23 ° C. and 65% RH. The sample was aged in an atmosphere for one day, peeled at a peel angle of 90 °, and observed for the residual state of the PSA on the glass surface, and evaluated according to the following criteria. 5: Residual area of PSA (PSA) is less than 10% .... Excellent adhesive strength. 4: Residual area of PSA (PSA) is 10% or more and less than 20% .... Good adhesive strength. 3: Residual area of PSA (PSA). 20% or more and less than 30% ... Slightly good adhesive strength 2: Residual area of PSA (PSA) is 30% or more and less than 40% ... Poor adhesion 1: Residual area of PSA (PSA) exceeds 40% ... Extremely poor adhesion

(5) Blocking Resistance Two films were superposed on each other so that the coated surface and the non-coated surface were in contact with each other. apply a pressure of cm ²
Thereafter, the film was peeled, and the blocking resistance was evaluated based on the peeling force according to the following criteria. ：: Peeling force <98 mN / 5 cm: very good blocking resistance ○: 98 mN / 5 cm ≦ peeling force <147 mN / 5 cm: good blocking resistance Δ: 147 mN / 5 cm ≦ peeling force <196 mN / 5 cm: blocking resistance Moderately good ×: 196 mN / 5 cm ≦ peeling power …… Defective blocking resistance

(6) Comprehensive evaluation Haze, surface roughness, coefficient of friction, adhesion (hard coat
Based on the results of the evaluation of the properties of the pressure-sensitive adhesive and the blocking resistance, the evaluation was made according to the following criteria. ：: Most of each characteristic is extremely good and there is no defective .... Comprehensive evaluation is extremely good. X: Some of each characteristic is defective.

[Examples 1 and 2 and Comparative Example 1] Molten polyethylene terephthalate (intrinsic viscosity: 0.64 dl / g,
(Glass transition point: 78 ° C.), extruded from a die, cooled by a cooling drum by a conventional method to obtain an unstretched film, and then stretched 3.6 times in the machine direction. The aqueous coating liquid having a solid content of 8% in 1) was uniformly applied by a roll coater.

[0048]

[Table 1]

In Table 1, each component in the coating layer represents the following polymer or compound. Polyester: polyester copolymer having an acid component of 90 mol% of terephthalic acid / 4 mol% of isophthalic acid / 5 mol of 5-sodium sulfoisophthalic acid and a glycol component of 90 mol% of ethylene glycol / 10 mol% of diethylene glycol (Tg = 70 ° C.) ). Acrylic: Constituent component is methyl methacrylate 50 mol%
Acrylic copolymer (Tg = 40 ° C.) of Ethyl acrylate / 40 mol% / N-methylol acrylamide 5 mol% / 2-hydroxyethyl methacrylate 5 mol%. Wax 1: Carnauba wax Wax 2: Polyethylene wax Wetting agent: Polyoxyethylene (n = 7) lauryl ether

Then, the coated film was successively coated with 9
Dried at 5 ° C., stretched 3.8 times at 120 ° C. in the transverse direction,
Shrink by 3% in the width direction at 220 ° C, heat-fixed, thickness 188
A μm laminated film was obtained. Table 2 shows the evaluation results of the obtained laminated films. In addition, the thickness of the coating film is 0.15 μm.
Met.

Example 3 Molten polyethylene-2,6-
Naphthalate (intrinsic viscosity: 0.60 l / g, glass transition point: 121 ° C.) was extruded from a die, cooled by a cooling drum by a conventional method to form an unstretched film, and then 3.
After the film was stretched 6 times, an aqueous coating solution having a solid content concentration of 8% of the coating composition (coating solution 1 in Table 1) was uniformly applied to both surfaces by a roll coater. Next, the coated film was subsequently dried at 105 ° C., stretched 3.8 times in the transverse direction at 140 ° C., shrunk 3% in the width direction at 230 ° C., and heat-set to obtain a 188 μm thick laminated film. Was. Table 2 shows the evaluation results of the obtained laminated films. In addition, the thickness of the coating film is 0.1.
It was 15 μm.

Comparative Example 2 The same procedure as in Examples 1 to 3 was carried out except that no coating layer was provided. Table 2 shows the evaluation results of the obtained films.

[0053]

[Table 2]

As is evident from the results shown in Table 2, the optically-adhesive laminated film of the present invention is excellent in transparency, slipperiness, adhesion to the hard coat layer and the pressure-sensitive adhesive layer, and has excellent blocking resistance. It was excellent.

[0055]

According to the optically-adhesive laminated film of the present invention, a film having excellent adhesiveness, transparency and lubricity can be obtained by forming a specific easily-adhesive layer. Further, the film of the present invention is useful for various optical applications, particularly, a base film of a prism lens sheet, a touch panel, a backlight, etc., a base film of an antireflection film, and an explosion-proof base film of a display.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F006 AA35 AB01 AB24 AB35 BA01 BA09 CA05 4F100 AJ11B AJ11C AK25B AK25C AK41A AK42B AK42C AK54 AL01 BA02 BA03 BA06 BA07 BA10B BA10C EH17 EH172 EH46 EH462 EJ38 382 JK15 JL11 YY00B YY00C 4J004 AA04 AA10 AA15 AB01 CA06

Claims (5)

[Claims] 1. A laminated film in which a coating layer containing wax is formed on at least one side of a polyester film and has a haze value of 1% or less, and a friction coefficient (μs) of the coating layer surface is 0.8 or less. An easily adhesive laminated film for optics, characterized in that: 2. The optically-adhesive laminated film according to claim 1, wherein the wax is at least one member selected from the group consisting of carnauba wax, paraffin wax and polyethylene wax. 3. The optically-adhesive laminated film according to claim 1, wherein the coating layer contains wax in a range of 0.5 to 20% by weight. 4. The optically-adhesive laminated film according to claim 1, wherein the coating layer contains a polyester resin and an acrylic resin. 5. The optically-adhesive laminated film according to claim 1, wherein the polyester film mainly comprises polyethylene terephthalate and / or polyethylene-2,6-naphthalate.