JPH11216793A - Base material film for deposited film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base material film for a deposited film having an excellent oxygen gas barrier properties, steam barrier properties and the like. SOLUTION: The base material film comprises a coating layer formed by coating at least one side surface of a plastic film with an anchor coating agent so that a composition of the layer is less than 3 atomic % and a ratio (P2/P1) of a maximum peak intensity (P2) between 1900 and 1600 cm<-1> to a maximum peak intensity (P1) between 1600 and 1450 cm<-1> of an infrared absorption spectrum of the coating layer is 10 to 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate film suitably used as a substrate in a vapor-deposited film formed by forming a thin film of a metal or a metal oxide.

[0002]

2. Description of the Related Art A vapor deposition film has a gas barrier property by selecting a metal and / or metal oxide to be vapor deposited.
It is used for various applications because it can change various properties such as water impermeability, visible / ultraviolet light shielding property, heat ray reflection property, conductivity, transparent conductivity, and magnetic recording property. For example, packaging materials, decoration materials, window glass shielding materials, gold and silver thread materials, capacitor materials, display materials, wiring board materials,
Used for magnetic recording materials. Furthermore, in recent years, new applications, such as a part of a transparent conductive sheet used for a liquid crystal display element, a solar cell, an electromagnetic wave shield, a touch panel, an EL substrate, a color filter, and the like, have attracted attention.
In particular, this vapor deposition film has a problem in that the vapor deposition film is partially peeled off during the processing step of the film or by contact with moisture, and the properties as the vapor deposition film, for example, gas barrier properties are deteriorated.

Conventionally, in order to prevent the gas barrier property from being deteriorated, an anchor coating agent (coating agent) such as various polyurethanes or a mixture of polyurethane and polyester is provided between the base film and the evaporation layer of the evaporation film. A method of providing a coating layer (undercoat layer) is known (for example, JP-A-2-50837). Further, in order to improve water resistance and solvent resistance, an anchor coating agent containing a special polyurethane, polyester and epoxy compound has been proposed (JP-A-4-176858). Further, use of a silane coupling agent has been proposed for improving the adhesion between the thin film and the base film (Japanese Patent Application Laid-Open No. 2-130139).

[0004]

However, most of the above-mentioned vapor-deposited films have insufficient water resistance (hot water resistance) and solvent resistance at high temperatures. Gas barrier properties after and after printing with a solvent-based ink are not always sufficient. Also,
Although the performance of silane coupling agents can be improved, they are generally expensive and disadvantageous in cost. Furthermore, as the use of the vapor deposition film has expanded, a gas barrier vapor deposition film having higher adhesion, higher reliability and lower cost has been demanded.

[0005] Further, the coating layer formed by the anchor coating agent is
It may be provided after film formation, but an in-line coating method provided in the film formation step is also possible. For example,
When the film is a biaxially stretched film, a uniaxially stretched film is coated with an anchor coating agent, stretched in a dry or undried state in a horizontal direction, and then subjected to a heat treatment. Since they can be performed at the same time, a great merit can be expected in terms of manufacturing cost. However, a suitable base film for vapor deposition provided with a coating layer by this in-line coating method is not known, and a vapor deposition film obtained from the substrate film is more than a vapor deposition film obtained by an ordinary method. , Solvent resistance,
There is a problem that the hot water resistance is insufficient, and the gas barrier properties after printing or after hot water treatment such as boiling and retorting are significantly reduced.

[0006]

Means for Solving the Problems In view of the above-mentioned circumstances, the present inventors have made intensive studies to solve the above-mentioned problems, and as a result, according to a vapor-deposited film using an anchor coat agent having a specific composition, in-line It has been found that even with the coating method, a desired thin film gas barrier film having desired gas barrier properties, exhibiting good adhesion without using an expensive silane coupling agent, and having both solvent resistance and hot water resistance can be provided. Reached the present invention.

That is, according to the present invention, the composition of a coating layer formed by applying an anchor coating agent on at least one surface of a plastic film is less than 3 atomic% of nitrogen, and the coating layer has an infrared absorption spectrum of 1600. ~ 1450cm ^-1
1900 to 160 for the maximum peak intensity (P1) between
Ratio of maximum peak intensity (P2) between 0 cm ^-1 (P2 / P1)
Is 10 or more and 60 or less.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The raw material used in the plastic film of the present invention is not particularly limited as long as it is a plastic raw material used as a film. As specific examples, ethylene, propylene, polyolefins such as homopolymers or copolymers such as butene, amorphous polyolefins such as cyclic polyolefins,
Polyethylene terephthalate, polyethylene-2,6-
Polyester resins such as naphthalate, polyamides such as nylon 6, nylon 12, and copolymer nylon, polyvinyl alcohol, ethylene-vinyl acetate copolymer partially hydrolyzed product (EVOH), polyimide, polyetherimide, polysulfone, and polyethersulfone , Polyether ether ketone, polycarbonate (PC), polyvinyl butyral, polyarylate, ethylene-tetrafluoroethylene copolymer, ethylene trifluoride chloride, ethylene tetrafluoride-perfluoroalkyl vinyl ether copolymer, polyvinylidene fluoride, A resin composition comprising a fluororesin such as polyvinyl fluoride, perfluoroethylene-perfluoropropylene-perfluorovinylether terpolymer, an acrylate compound having a radically reactive unsaturated compound, A resin composition comprising a relay compound and a mercapto compound having a thiol group, epoxy acrylate, urethane acrylate, polyester acrylate, a photocurable resin such as a resin composition obtained by melting an oligomer such as polyether acrylate into a polyfunctional acrylate monomer, and These mixtures and the like are mentioned, but polyester, polypropylene, polyamide, polyvinyl alcohol and ethylene-vinyl acetate copolymer partial hydrolyzate are preferred, and polyester is particularly preferred.

In the above, the polyester is represented by polyethylene terephthalate in which at least 80 mol% of its constituent units are ethylene terephthalate, polyethylene naphthalate in which at least 80 mol% of its constituent units is ethylene naphthalate, and the like. It is not limited to. Examples of the copolymerization component other than the above-mentioned components include diol components such as diethylene glycol, propylene glycol, neopentyl glycol, and cyclohexane dimethanol, isophthalic acid, adipic acid, azelaic acid, dicarboxylic acid of sebacic acid and ester-forming derivatives thereof. Acid components and the like can be used. Further, polyvinyl alcohol having a saponification degree of usually 95 mol% or more, preferably 99 mol% or more is used. Furthermore, ethylene-
As the vinyl acetate copolymer partial hydrolyzate, usually, one having an ethylene content of 20 to 60 mol% and a saponification degree of 90 mol% or more is used.

[0010] The polyester of the present invention may contain additional particles for forming projections on the film surface, precipitated particles, and other catalyst residues in an amount commonly used by those skilled in the art depending on the application. . In addition, as additives other than the above-mentioned projection-forming agent, if necessary, an antistatic agent, a stabilizer, a lubricant, a crosslinking agent, an anti-blocking agent, an antioxidant, a coloring agent, a light-blocking agent, an ultraviolet absorber May be contained.

A film using such a plastic raw material can be produced by a conventionally known general method. For example, a raw resin is melted by an extruder, extruded by an annular die or T die, and quenched to produce a substantially amorphous unoriented film. A stretched film can be produced from the unstretched film by a conventionally known general method such as uniaxial stretching, tenter-type sequential biaxial stretching, tenter-type simultaneous biaxial stretching, and tubular simultaneous biaxial stretching. The thickness of the film is selected from the range of usually 5 to 500 µm, preferably 10 to 200 µm, depending on the application such as mechanical strength, flexibility, transparency and the like as the base material of the deposited film. Also,
The width and length of the film are not particularly limited, and can be appropriately selected depending on the application. The polyester film may be subjected to a surface treatment by a conventionally known method such as a corona discharge treatment, a flame treatment, a plasma treatment, a glow discharge treatment, and a chemical treatment before forming the coating layer.

In the present invention, an anchor coat agent is applied to at least one side of the above plastic film. In addition, this anchor coating process can be performed not only during the secondary processing of the plastic film but also during the manufacturing process. For example, after performing the anchor coating process on the unstretched or uniaxially stretched plastic film. An in-line coating method in which stretching is further performed is also possible. In particular, when performing in-line coating in the manufacturing process of a biaxially stretched film, the coating liquid is preferably applied to a film that has been uniaxially stretched in the longitudinal direction (the film flow direction) and stretched in the horizontal direction in a dry or undried state. Then, heat treatment is preferably performed. In addition, in-line coating is preferable because it is inexpensive as compared with the case of performing anchor coating during secondary processing.

In the present invention, the above plastics
Apply an anchor coating agent on at least one side of the film
To form a coating layer, and the composition of the coating layer is nitrogen 3
Less than atomic% and the infrared absorption spectrum of the coating layer
1600-1450cm of le ^-1Peak intensity between (P
1900-1600cm for 1)^-1Maximum peak between
Strength (P2) ratio (P2 / P1) of 10 to 60, preferably
Preferably, it is 15 or more and 50 or less. Or
By satisfying such requirements, silane coupling agents, etc.
Improves the adhesion between the thin film and the base film without using too much
And solvent resistance, hot water resistance and the like can be improved.

Although there are many nitrogen-containing anchor coating agents such as polyurethane resins, in the present invention, the composition of the coating layer is less than 3 atomic% of nitrogen, and the nitrogen-containing anchor coating agent is not used in a large amount. If the nitrogen content is 3 atomic% or more, it is not preferable because the solvent resistance and hot water resistance of a deposited film tend to be inferior especially when a silane coupling agent-free system or an in-line coating method is employed. Although the use of a small amount of the nitrogen-containing anchor coating agent itself is preferable, for example, X-ray photoelectron spectroscopy (XP)
It may be less than about 1 atomic%, which is the lower limit of the determination of nitrogen atoms in S). Further, in the present invention, it is not necessary to add a silane coupling agent which is generally known to be effective for improving the adhesion between the metal-based thin film and the substrate, and X-ray photoelectron spectroscopy (XPS) is not required. There is no problem even if it is less than about 1 atomic%, which is the lower limit of quantification of silicon atoms in the above.

On the other hand, the maximum peak between 1600 and 1450 cm ⁻¹ in the infrared absorption spectrum of the above-mentioned coating layer is N—H
Absorption due to stretching vibration, the maximum peak between 1900 and 1600 cm ^-1 is absorption due to C = O stretching vibration, but when the intensity ratio (P2 / P1) is less than 10, poor solvent resistance and hot water resistance. In particular, the solvent resistance and hot water resistance in the case of the in-line coating method become poor.

In order to obtain a coating layer having the above physical properties, the type and composition of the anchor coating agent have a great influence. As the anchor coating agent, an acrylic resin, a polyester resin, a polyurethane resin, an oxazoline group-containing resin, an ethylene vinyl alcohol resin, a vinyl modified resin, an epoxy resin, a modified styrene resin, a modified silicon resin, an alkyl titanate, or the like alone or
Although at least one kind can be used in combination, water-soluble or water-dispersible acrylic resins, polyester resins, polyurethane resins, and oxazoline group-containing resins are particularly preferable.

The above-mentioned acrylic resin is a resin containing alkyl acrylate and / or alkyl methacrylate as a main component. Specifically, the content of the alkyl acrylate and / or alkyl methacrylate component is usually 40 to 95 mol. %, A content of a copolymerizable vinyl monomer component having a functional group is usually 5 to 60 mol%, and a non-emulsifier type water-soluble or water-dispersible resin is desirable. Examples of the functional group in the vinyl monomer include a carboxyl group, an acid anhydride group, a sulfonic acid group or a salt thereof, an amide group or an alkylolated amide group, an amino group (including a substituted amino group), Examples include an alkylolated amino group or a salt thereof, a hydroxyl group, an epoxy group, and the like, particularly, a carboxyl group, an acid anhydride group,
Epoxy groups and the like are preferred.

The polyester resin is preferably a water-soluble or water-dispersible resin that does not contain a low-molecular hydrophilic dispersant. Such polyester-based resin,
In order to enhance the affinity with an aqueous medium, those containing a carboxyl group or a salt thereof (hereinafter simply referred to as a carboxyl group) are preferable. The polyurethane resin is preferably a water-soluble or water-dispersible resin produced by reacting a polyhydroxy compound and a polyisocyanate compound according to a conventional method, and preferably contains a carboxyl group.

The above-mentioned oxazoline group-containing resin is preferably an addition-polymerizable oxazoline described in JP-B-6-39548 and, if necessary, a water-soluble polymer obtained by polymerizing at least one other monomer. Or a water-dispersible polymer. As this addition-polymerizable oxazoline,
For example, 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, and two or more of these may be used in combination. Further, there is no limitation as long as it is a monomer copolymerizable with addition-polymerizable oxazoline, and examples thereof include methacrylates such as methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate, methacrylic acid, itaconic acid, and maleic acid. Unsaturated carboxylic acids, unsaturated nitriles such as methacrylonitrile, unsaturated amides such as methacrylamide, N-methylolated methacrylamide, vinyl esters such as vinyl acetate and vinyl propionate, methyl vinyl ether, ethyl vinyl ether and the like. Α- such as vinyl ethers, ethylene and propylene
Examples include halogen-containing α, β-unsaturated monomers such as olefins, vinyl chloride, vinylidene chloride, and vinyl fluoride, and α, β-unsaturated aromatic monomers such as styrene and α-methylstyrene. More than one species may be used in combination.

Further, when the above resin compound is used, when an epoxy compound such as glycidyl acrylate or glycidyl methacrylate is used in combination, it can be cross-linked to a side chain such as a carboxyl group in the resin compound to enhance the adhesiveness to a deposited film. . The above anchor coating agent is usually diluted with water or an organic solvent and applied as a solution or dispersion on the surface of the polyester film. In this case, the coating solution contains a crosslinking agent such as a conventionally known silane coupling agent,
Inorganic fine particles, an antifoaming agent, a foaming agent, a coating improver, a thickener, an antistatic agent, a lubricant, a polymer particle, an antioxidant, an ultraviolet absorber, a dye, a pigment and the like can also be added.

As a specific application method of the above anchor coating agent, a known method using an air doctor coater, a rod coater, a reverse roll coater, a gravure coater, a kiss coater or the like can be adopted. According to the anchor coating treatment, generally, the adhesion between the thin film and the film can be improved, but as a result, good gas barrier properties, adhesion, solvent resistance, and hot water resistance are easily developed. The thickness of the anchor coating agent is selected in the range of usually 0.005 to 5 μm, preferably 0.01 to 1 μm, in accordance with the surface unevenness of the polyester film to be used. Usually 0.00
If the thickness is less than 5 μm, coating unevenness occurs. On the other hand, if it exceeds 5 μm, the thickness of the coating layer becomes uneven, and the lubricity of the film tends to decrease.

The plastic film which has been subjected to the above-described anchor coating treatment is used as a base film of a vapor deposition film. In the present invention, as the metal and / or metal oxide to be deposited, for example, aluminum, silicon, magnesium, palladium, zinc, tin, nickel,
Metals such as silver, copper, gold, indium, stainless steel, chromium, and titanium, aluminum oxide, zinc oxide, antimony oxide, indium oxide, calcium oxide, cadmium oxide, silver oxide, gold oxide, chromium oxide, silicon oxide, and oxide Cobalt, zirconium oxide, tin oxide, titanium oxide, iron oxide, copper oxide, nickel oxide, platinum oxide, palladium oxide, bismuth oxide, magnesium oxide, manganese oxide,
Examples include metal oxides such as molybdenum oxide, vanadium oxide, and barium oxide.Since silicon oxide and aluminum oxide have advanced oxygen gas barrier properties, water vapor barrier properties and transparency, and are industrially inexpensive. Particularly preferred. Such silicon oxide and aluminum oxide may be used alone or as a mixture.
These metals and / or metal oxides are generally deposited by vacuum deposition, but may be deposited by ion plating, sputtering, CVD or the like. The deposition film is formed on the surface of the coating layer. The thickness of the deposited film is appropriately selected depending on the final use of the deposited film. Note that a resin protective layer may be provided on the deposition surface in order to impart adhesion, particularly water resistance and scratch resistance, after the deposition.

[0023]

EXAMPLES Hereinafter, the contents and effects of the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist. In addition, the method of measuring and evaluating a base film and a vapor deposition film in the following Examples is as follows. <XPS Composition Analysis of Coating Layer Surface of Base Film> Using a X-ray photoelectron spectrometer ESCA-5500 manufactured by Phi Corporation, the constituent elements were confirmed by a survey (wide scan) spectrum and then by a multi (narrow scan) spectrum. The composition ratio of each element was determined. The measurement conditions were as follows: measurement area 800 μmφ, X-ray source Al, 1400 eV, 400
W, 15.0 kV, sample-detector angle 45 degrees, survey spectrum Pass Energy 93.90 eV,
0.400 eV / step, narrow spectrum Pass
Energy 29.35 eV, 0.125 eV / st
ep. In this case, the substrate film immediately after being unwound from the film roll was immediately placed under vacuum in the analyzer to avoid secondary contamination and air contamination on the surface of the coating layer of the substrate film. <FT-IR Composition Analysis of Coating Layer Component of Base Film> To avoid contamination, the base film immediately after being unwound from the film roll was immediately analyzed. Methanol is dropped between the surfaces of the coating layers of the two base films cut to about 3 × 3 cm, the KBr powder is sandwiched, and the base film is rubbed, so that the coating layer components are adsorbed on the KBr powder and the KBr powder is absorbed. Was placed on a KBr plate to obtain a sample for infrared spectroscopic analysis. The analysis was performed by the Johnson method using a Fourier transform infrared spectrometer JIR-3510 manufactured by JASCO Corporation. The measurement was performed 100 times at a wave number resolution of 4 / cm, and the absorbance of each peak was corrected by a baseline.

The Johnson method is an effective method for performing infrared spectroscopy analysis on a thin coating film having a thickness of 1 μm or less. This is a method in which a solvent is dropped, a KBr powder is sandwiched, and a substrate film is rubbed to adsorb a coating layer component to the KBr powder, and the KBr powder is placed on a KBr plate to perform infrared spectroscopy analysis. By using this technique,
Only the coating layer components can be analyzed. <Thickness of thin film> The cross section of the vapor-deposited film obtained in each of the examples and comparative examples was measured with a transmission electron microscope (H-6 manufactured by Hitachi, Ltd.).
(Type 00) and the thickness of the thin film was measured. <Oxygen permeability of thin film gas barrier film (cc / m ²
/ Day)> According to ASTM D-3985, an oxygen permeability measuring device (OX-TRA, manufactured by Modern Control Co., Ltd.)
N100) and measured under the conditions of 25 ° C. and 95% relative humidity, and judged according to the following criteria.

1 or less; ○ (good), 2 or more; × (poor) <Solvent resistance test of vapor-deposited film> Toyo Ink's NewLP Super White Gravure Ink 2 μm thick was printed on the thin film surface and dried at 80 ° C. for 1 minute. After 1 day at 23 ° C. and a relative humidity of 50%, the oxygen permeability was measured. <Hot water resistance test of vapor-deposited film> 90 ° C, boiled for 30 minutes, lightly wiped water, 23 ° C, relative humidity 50
After 1 day at%, the oxygen transmission rate was measured. Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.62 dl / g was extruded from a die of an extruder at a temperature of 280 to 300 ° C., cast into a cooling drum while using an electrostatic adhesion method, and was made amorphous having a thickness of about 150 μm. A polyester sheet was obtained. The above sheet was stretched 3.5 times in the longitudinal direction at 95 ° C., and an aqueous medium coating solution containing 45, 40, and 15 parts by weight of the following A, C, and E was applied to one surface of the film,
Further, the film was stretched 3.5 times in the transverse direction at 110 ° C. and heat-treated at 230 ° C. to obtain a biaxially stretched polyester film having a coating layer thickness of 0.1 μm and a base polyester film thickness of 12 μm.

On the coating surface of this film, a roll-up type vacuum evaporation apparatus was used to evaporate SiO (manufactured by Sumitomo Citix Co., Ltd.) as an evaporation material by a high frequency heating method, and the pressure was 8 × 1.
Under a condition of 0 ^-5 Torr, a silicon oxide vapor-deposited film having a thickness of 25 nm was formed to obtain a vapor-deposited film on which a silicon oxide thin film was formed. Table 1 shows the physical properties of the deposited film. Example 2 A, B, C, and D of the following coating solutions were used for 35 and 3 respectively.
A biaxially stretched polyester film was obtained in the same manner as in Example 1, except that the aqueous medium coating solution was added in an amount of 0, 25, or 10 parts by weight. Table 1 shows the physical properties of the deposited film. Example 3 A, C, D, and E of the following coating solutions were used for 40, 4 respectively.
A biaxially stretched polyester film was obtained in the same manner as in Example 1, except that the aqueous medium coating solution was mixed with 0, 10, and 10 parts by weight. Table 1 shows the physical properties of the deposited film. Comparative Example 1 The following coating liquids were used for C, D, and E, respectively, at 70, 20, 1
Example 1 was repeated except that the aqueous medium coating solution was mixed with 0 parts by weight.
A biaxially stretched polyester film was obtained in the same manner as described above to obtain a vapor-deposited film. Table 1 shows the results of physical properties of the deposited film.
Shown in Comparative Example 2 A biaxially stretched polyester film was obtained in the same manner as in Example 1 except that the coating liquid was changed to an aqueous medium coating liquid containing 70 and 30 parts by weight of each of C and E described below. Was. Table 1 shows the physical properties of the deposited film. -Resin A: aqueous acrylic resin 40 parts by weight of ethyl acrylate, methyl methacrylate 30
A solution of a mixture of 20 parts by weight of methacrylic acid and 10 parts by weight of glycidyl methacrylate is subjected to solution polymerization in ethyl alcohol, and after the polymerization, the mixture is heated while adding water to remove the ethyl alcohol. The pH was adjusted to 7.5 with aqueous ammonia to obtain a coating liquid of an aqueous acrylic resin (non-emulsifier type). -Resin B: Oxazoline group-containing water-soluble polymer solution (water: 1-methoxy-2-isopropanol = 1: 2) Epocross WS-500 manufactured by Nippon Shokubai Co., Ltd. was used. -Resin C: water-based polyurethane resin water-based paint First, 664 parts by weight of terephthalic acid and 631 of isophthalic acid
A polyester polyol consisting of 472 parts by weight of 1,4-butanediol and 447 parts by weight of neopentyl glycol was obtained. Next, 321 parts by weight of adipic acid and 268 parts by weight of dimethylolpropionic acid were added to the obtained polyester polyol to obtain a pendant carboxyl group-containing polyester polyol A. Further, 160 parts by weight of hexamethylene diisocyanate was added to 1880 parts by weight of the polyester polyol A to obtain a water-based polyurethane resin-based paint. -Resin D: Water-dispersed polyester having a carboxyl group Polyester WR-961 manufactured by Nippon Synthetic Chemical Industry was used. Compound E: Epoxy compound Triethylene glycol diglycidyl ether was used.

[0027]

[Table-1]

[0028]

The vapor-deposited film comprising the plastic film of the present invention as a substrate has excellent gas barrier properties against water vapor and oxygen, as well as excellent solvent resistance and gas barrier properties after hot water treatment, and It can be manufactured at low cost. Such a vapor-deposited film can be used by laminating it with another film or paper, or can be used by attaching a cured film layer on a thin film. It can be applied to packaging, transparent conductive sheets, etc. to prevent deterioration of packaging, food, industrial products, pharmaceuticals, etc.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09D 5/00 C09D 5/00 A 133/00 133/00 139/04 139/04 167/00 167/00 175/04 175 / 04 // C23C 14/20 C23C 14/20 B B29K 67:00 B29L 7:00 (72) Inventor Yuzo Otani 347 Inokachi, Yamahigashi-cho, Sakata-gun, Shiga Prefecture Die Ahoil Hoechst Co., Ltd.

Claims (7)

[Claims] The composition of a coating layer formed by applying an anchor coating agent on at least one surface of a plastic film is less than 3 atomic% of nitrogen, and the coating layer has an infrared absorption spectrum of 1600 to 1450 cm ^-1. The ratio (P2 / P1) of the maximum peak intensity (P2) between 1900 and 1600 cm ^-1 to the maximum peak intensity (P1) between 10 and 60
A base film for a vapor-deposited film, comprising: 2. The base film according to claim 1, wherein the composition of the coating layer is less than 1 atomic% of silicon. 3. The base film according to claim 1, wherein the coating layer is formed by stretching in at least one direction after applying the anchor coating agent. 4. An anchor coating agent comprising at least one of a water-soluble or water-dispersible acrylic resin, polyester resin, polyurethane resin and oxazoline group-containing resin. 3. The base film according to any of 3. 5. The base film according to claim 1, wherein the plastic film is polyester. 6. The base film according to claim 1, wherein the plastic film is made of any one of polypropylene, polyamide, polyvinyl alcohol, and a partially hydrolyzed ethylene-vinyl acetate copolymer. 7. A vapor-deposited film formed by forming a thin film made of a metal and / or a metal oxide on the surface of a coating layer of the substrate film according to any one of claims 1 to 6.