JPH06287747A - Metal vapor-deposited plastic film - Google Patents

Abstract

PURPOSE:To provide a metal vapor-deposited plastic film with the adhesive strength of the vapor-deposited film enhanced, excellent in the brightness and glossiness of the metal vapor-deposited surface and further excellent in the printability and laminating property of the metal vapor-deposited surface. CONSTITUTION:A composition contg. 100 pts.wt. of PP resin and 2-20 pts.wt. of an amorphous ethylene-propylene-diene copolymer is used to obtain a base film, and a metal is vapor-deposited on the base film to form a metal vapor- deposited plastic film. Otherwise, a composition contg. 100 pts.wt. of PP resin, 1-10 pts.wt. of a PE resin having >=0.930g/cm<3> density and 2-20 pts.wt. of an amorphous ethylene-propylene-diene copolymer is used to obtain a base film, and a metal is vapor-deposited on the base film to form a metal vapor-deposited plastic film.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to metallized plastic films. More specifically, obtained by using a composition in which a specific amount of an amorphous ethylene-propylene-diene copolymer is blended with a polypropylene resin or a composition in which a specific amount of a specific polyethylene resin is further blended with the composition. The present invention relates to a metal vapor deposition film in which a metal is vapor deposited on the film.

[0002]

2. Description of the Related Art In recent years, metal-deposited plastic films obtained by vapor-depositing a metal on a plastic film have been used to make use of their excellent decorative properties, gas barrier properties, light blocking properties, etc. It is used in a wide range of materials, from packaging materials to food products. In particular, aluminum-deposited plastic films are widely used mainly for packaging applications, and when used as packaging materials, in most cases, the vapor-deposited surface (aluminum surface) is printed or laminated with another film. is there. In particular, polypropylene-based film (herein, polypropylene-based film means, in addition to propylene homopolymer, ethylene containing propylene as the main component and other α-
A copolymer obtained with an olefin or a film obtained by using a mixture thereof is a main plastic film, and the metal-deposited polypropylene film using the polypropylene film as a base film has hitherto been known. Widely used for purposes.

However, the metal vapor-deposited polypropylene film has a weak adhesive strength between the base film and the vapor-deposited film, that is, so-called vapor-deposited strength. Especially when the vapor-deposited metal is aluminum, the printability of the vapor-deposited surface and the adhesiveness with other films (hereinafter It has a drawback that it cannot be used in applications requiring printing, laminating, etc. A metal-deposited low-density polyethylene plastic film with strong vapor deposition strength has a roughened film surface and the gloss of the metal-deposited surface is low, and it is not possible to obtain a metal-deposited plastic film with a beautiful metallic luster. There wasn't.

On the other hand, the reason that the vapor deposition strength of the metal vapor-deposited plastic film using the polypropylene film is low is that the polypropylene resin does not have a polar group. In addition, the reason why the printability and laminating property of the vapor deposition surface are low is that additives such as neutralizing agents, slip agents, and antioxidants that are added to the base film pass through the vapor deposition layer and exude to the vapor deposition surface. In addition, when the additive exuded on the surface on the non-deposition side is rolled up and transferred to the deposition surface, the printability and laminating property of the deposition surface are deteriorated due to such a cause (Japanese Patent Publication 58). -4
9574, JP-A-59-25829). Explaining specifically the cause of this latter, fatty acid derivatives used as neutralizing agents among additives, particularly higher fatty acid salts such as calcium stearate and sodium stearate, oleic acid amide, stearic acid amide, erucic acid amide, etc. The higher fatty acid amide described above lowers the wettability index of the vapor deposition surface (aluminum surface) to 33 dyn / cm or less even when the content thereof is a trace amount of about 0.01% by weight, and printing or lamination adhesion to the vapor deposition surface is not possible. Because it enables it.

Conventionally, various proposals have been made in order to solve such problems. For example, as a method of increasing the vapor deposition strength, a method of physically or chemically roughening the surface of the base film to enhance the vapor deposition strength, corona discharge treatment,
There are known a method of increasing the vapor deposition strength by oxidizing the surface of the base film by applying a polar group by a gas flame or irradiation of radiation, and a method of coating the surface of the base film with an adhesive material. However, any of the methods of roughening or oxidizing the surface of the base film alone has insufficient vapor deposition strength, and the method of coating the adhesive material is physically or chemically pretreated before coating the film surface. However, there are drawbacks that the process is complicated and the cost of the vapor deposition film obtained is high. Further, as a method of improving the printability of the vapor deposition surface as well as the vapor deposition strength and the laminating property, a film obtained by using a composition obtained by blending polypropylene with a grafted polypropylene obtained by graft-polymerizing polypropylene with maleic anhydride is used as a base film. It is also known to do so (Japanese Patent Laid-Open No. 50-61469 and Japanese Patent Publication No. 58-49574). However, in this case as well, the film cost becomes high, and the odor is strong due to unreacted maleic acid remaining in the film and decomposition products generated by thermal decomposition, and when used for food packaging, a strange odor is transferred to the contents. There is.

[0006]

DISCLOSURE OF THE INVENTION The present inventors have solved the above-mentioned drawbacks of the prior art, and even when a polypropylene resin is used as a base film, the adhesive strength of the vapor deposition film is high and the brightness of the metal vapor deposition surface is Various studies were conducted in order to obtain a metal vapor-deposited plastic film having excellent glossiness, printability on the metal vapor deposition surface, and excellent laminating property. As a result, a base film is a plastic film obtained from a composition in which a specific amount of an amorphous ethylene-propylene-diene copolymer is added to a polypropylene resin or a composition in which a specific polyethylene resin is further added to the composition. It was found that the above metal-deposited plastic film can solve the above problems, and based on this finding, the present invention was completed. As is clear from the above description, the object of the present invention is a metal-deposited plastic film having high adhesive strength of a vapor-deposited film, excellent brightness and glossiness of a metal-deposited surface, and further excellent printability and laminating property of a metal-deposited surface. Is to provide.

[0007]

The present invention provides the following (1) to
It has the configuration of (4). (1) A metal-deposited plastic film in which a metal is vapor-deposited on a base film obtained by using a composition in which 2 to 20 parts by weight of an amorphous ethylene-propylene-diene copolymer is mixed with 100 parts by weight of a polypropylene resin. (2) Density 0.9 per 100 parts by weight of polypropylene resin
1 to 10 parts by weight of a polyethylene resin of 30 g / cm ³ or more and an amorphous ethylene-propylene-diene copolymer 2
A metal-deposited plastic film in which a metal is vapor-deposited on a base film obtained by using a composition containing about 20 parts by weight. (3) Melt flow rate of polypropylene resin (M
The ratio of the melt flow rate (MFR-PE) of FR-PP) and the polyethylene-based resin satisfies the following equation 0.5 ≦ MFR-PE / MFR-PP: polypropylene-based resin and polyethylene-based resin The metal-deposited plastic film according to item 2. (4) The amorphous ethylene-propylene-diene copolymer having an ethylene content of at least 30% by weight and a Mooney viscosity of ML _{1 + 4} (100 ° C.) of 90 or less is used. The metallized plastic film according to any one of 3 above.

The present invention will be described in detail below. The present invention relates to a composition comprising 100 parts by weight of a polypropylene resin and 2 to 20 parts by weight of an amorphous ethylene-propylene-diene copolymer, and 100 parts by weight of a polypropylene resin, an amorphous ethylene-propylene-diene copolymer. It is a metal vapor-deposited plastic film in which a metal is vapor-deposited on a plastic film obtained by using a composition comprising 2 to 20 parts by weight and a specific polyethylene resin 1 to 10 parts by weight. The metal vapor deposition film is usually on only one side of the film, but may be formed on both sides of the film depending on the application. Further, a metal vapor-deposited plastic film in which a metal is vapor-deposited on the film surface of the present invention of the outermost layer of a laminated film in which a plurality of films are laminated with the film using the composition as the outermost layer is also referred to as the metal vapor deposition in the present invention. Included in plastic film.

The polypropylene resin used in the present invention is a crystalline propylene homopolymer, a crystalline copolymer of propylene and ethylene having propylene as a main component, or a crystalline copolymer of propylene and another α-olefin, and a mixture thereof. is there. The polypropylene resin contains 80 to 98% by weight of a propylene component and has a crystal melting point (Tm) of 115.
The crystalline copolymer in the range of 150 to 150 ° C. is preferable, and among them, the crystalline ethylene-propylene copolymer, the crystalline propylene-butene-1 copolymer, the crystalline ethylene-propylene-butene-1 ternary copolymer A combination (in this case, the content ratio of ethylene: butene-1 is preferably 10: 1 to 1:15) or a mixture thereof is particularly preferable. Ethylene
The film obtained from the composition obtained by mixing the propylene copolymer and the other crystalline copolymer described above is excellent in the adhesiveness to the deposited film, and is also excellent in the impact resistance and the heat sealability.

The above homopolymers and copolymers can be produced by known polymerization methods. For example, it can be obtained by polymerizing or copolymerizing a predetermined monomer in the presence of a Ziegler-Natta type catalyst. Here, the crystalline melting point (hereinafter abbreviated as Tm) means a 10 mg sample in a nitrogen atmosphere using a scanning differential calorimeter.
The peak temperature of the endothermic curve obtained by measuring the amount of endotherm associated with the melting of crystals at a temperature rising rate of ° C / min. In the case of a crystalline copolymer containing propylene as a main component, when the content of ethylene or α-olefin as a comonomer component is increased, T
m decreases. For example, in the case of a crystalline ethylene-propylene random copolymer, it will be slightly changed depending on the randomness of the copolymer, but if the ethylene content exceeds 2.5% by weight, it will be 150 ° C or lower. In addition, although a copolymer having a plurality of Tm may be obtained by performing copolymerization in multistage polymerization in two or more stages under different polymerization conditions, the temperature of the main peak is the crystal melting point in the present invention.

The amorphous ethylene-propylene-diene copolymer used in the present invention has an ethylene content of at least 30% by weight and a Mooney viscosity of ML _{1 + 4} (100 ° C.) measured according to JIS K6300. Those of 90 or less are preferable. The amorphous ethylene-propylene-diene copolymer is, for example, (a) at least magnesium,
A complex containing titanium and halogen (b) an ethylene, propylene and diene compound using a catalyst formed from three components of a metal of the first to third metals of the periodic table and (c) an electron donor. Can be obtained by random copolymerization.

The amorphous ethylene-propylene-diene copolymer used in the present invention preferably has an ethylene content of 30% by weight or more, because when the ethylene content is less than 30% by weight, a metal vapor-deposited film is obtained. At this time, the effect of improving the laminating property of the metal vapor deposition film may become insufficient. The Mooney viscosity is ML _{1 + 4} (100 ℃)
It is preferably 90 or less because the Mooney viscosity is M
When L _{1 + 4} (100 ° C.) exceeds 90, the compatibility with the polypropylene resin is deteriorated, and the transparency of the obtained film may be significantly deteriorated. The blending ratio of the amorphous ethylene-propylene-diene copolymer is 2 to 20 parts by weight with respect to 100 parts by weight of the propylene-based resin. If the blending amount is less than 2 parts by weight, the effect of improving the laminating property of the obtained film is not seen, and if it exceeds 20 parts by weight, the tackiness of the film itself increases and the film-forming property is extremely lowered and the film is wound. The appearance also becomes poor and it becomes difficult to obtain a uniform vapor deposition film.

In the present invention, by adding a specific polyethylene resin to a composition comprising a polypropylene resin and an amorphous ethylene-propylene-diene copolymer, vapor deposition which is an object of the present invention. It is possible to obtain a film having further improved strength, a beautiful glossy feeling, and further excellent printability, laminating property, slip property and blocking resistance of the vapor deposition film. At this time, the polyethylene-based resin added has a density of 0.930 g / cm ³
Above, the compounding amount is in the range of 1 to 10 parts by weight with respect to 100 parts by weight of the propylene resin. In addition, in order to obtain a metal vapor deposition film having an excellent metallic luster, the melt flow rate (MFR-PP) of the polypropylene resin used
And the melt flow rate of the polyethylene resin (MFR
It is particularly desirable to select and use the ratio of (-PE) such that 0.5 ≦ MFR-PE / MFR-PP. Here, the melt flow rate is based on JIS K 7210, and polypropylene-based resin (MFR-PP) has test condition 14 (230 ° C., 2.16 kgf), and polyethylene-based resin (MFR-PE) has test condition 4 (190 ° C.). , 2.1
6 kgf) refers to the value measured (unit: g / 10 min).

The density of the polyethylene resin is 0.930.
The reason for limiting to g / cm ³ or more is that the density is 0.930 g.
If it is less than / cm ³ , the effect of improving the slip property and blocking resistance of the obtained film is not seen, and the blending amount of the polyethylene resin is 1 to 10 parts by weight with respect to 100 parts by weight of the propylene resin. The reason for limiting is that the blending amount is 1
This is because when the amount is less than 10 parts by weight, the effect of improving the slip property and blocking resistance of the obtained film is not observed, and when it exceeds 10 parts by weight, the gloss of the metal vapor deposition film is deteriorated. The polyethylene resin used in the present invention is high-density polyethylene or a copolymer of ethylene and propylene, butene-1, hexene-1, or a mixture thereof, among which high-density polyethylene or linear low-density polyethylene is Particularly preferred.

If necessary, the raw material composition for the base film of the present invention may contain an antioxidant, an inorganic filler, a lubricant, an antiblocking agent, etc. within a range not impairing the object of the present invention. it can. A fatty acid and a derivative containing a fatty acid-forming group may reduce the adhesiveness of the vapor deposition film, the printability of the vapor deposition surface, and the laminating property of the vapor deposition film, so that it is necessary to be careful. As the antioxidant, phosphorus-based and phenol-based antioxidants having a molecular weight of 500 or more are particularly desirable. Specifically, tetrakis- [methylene-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane, 1,3,5-trimethyl-2,4,6,- Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, 1,3,5
-Tris (4-t-butyl-3-hydroxy-2,6-
Dimethylbenzyl) isocyanurate, 6- [4-hydroxy-3,5-di-t-butylamino) -2,4-bis-n-octylthio-1,3,5-triazine, 1,
1,3-tris (2-methyl-4-hydroxy-5-t
-Butylphenyl) butane, tris (3,5-di-t-)
Butyl-4-hydroxyphenyl) isocyanurate,
Tetrakis (2,4-di-t-butylphenyl) 4,
4′-biphenylene-diphosphonite and the like can be mentioned, and these can be used alone or in combination of two or more kinds. The content is suitably 0.03 to 0.30 parts by weight with respect to 100 parts by weight of the polypropylene resin. The inclusion of the above-mentioned antioxidant is extremely effective for the stability of the composition during film formation and during use of the film.

As the inorganic filler, any of calcium carbonate, silica, clay, talc, hydrotalcite, zeolites and the like can be used. As a method for adding the above-mentioned additives to the polypropylene resin, any method can be used as long as it is a method for uniformly dispersing it, but a ribbon blender, a Henschel mixer (trade name)
It is preferable to use a method such as mixing with an extruder or the like, and melt-kneading the mixture with an extruder or the like.

The base film of the present invention can be obtained by molding the above composition by a conventional T-die method or an inflation method. Not only these uniaxially or biaxially stretched films but also unstretched films can be used as the base film. Further, in the present invention, in addition to a single-layer plastic film, the film of the present invention is used as a surface layer on one side or both sides, and a composite film in which a plurality of other films are laminated is used as a base film. You can also When the base film used in the present invention is used only for the surface layer on one side, the metal is vapor-deposited on the surface of the film. The metal-deposited plastic film thus obtained has the same structure as a plastic film obtained by laminating a plurality of monolayer films on the side opposite to the vapor deposition surface of a single-layer metal-deposited metal film vapor-deposited on one side.

Hereinafter, the case where metal vapor deposition is performed using a single layer film will be described, but the same applies to the case of a composite film. The base film obtained from the composition can be directly subjected to metal vapor deposition, but the surface of the film is subjected to surface treatment such as corona discharge treatment in a special gas atmosphere such as nitrogen or oxygen or in air, or flame treatment. Metallization may be performed after improving the wettability and further improving the adhesiveness. As a method for performing metal vapor deposition on a long base film (usually a roll winding form), a vacuum degree in a vacuum vapor deposition apparatus equipped with a roll-out film feeding part, a vapor deposition part and a winding part is set to 10 ^−4. A method of heating the metal such as aluminum in a container or in the form of a filament in this apparatus to less than Torr to melt and evaporate the metal, and continuously evaporate the evaporated metal on the unwound film surface and wind it up. It is common. However, recently, in order to improve the productivity, one base film roll has become wide and has a length of 10,000 to 20,000 m, and a base film rolled into a long length has come to be used. The demand for high-speed vapor deposition of the base film and the winding shape are becoming more severe.

There are various vapor deposition methods other than the above-mentioned vacuum vapor deposition method. For example, a sputtering vapor deposition method or an ion plating method utilizing the phenomenon that the metal constituting the cathode scatters when discharged in vacuum. There is a law. In addition,
Aluminum is the most common metal to be deposited,
Gold, silver, copper, nickel, chromium, germanium, selenium, titanium, tin, zinc and the like can also be metal-deposited. The thickness of the metal vapor deposition layer is usually in the range of 50 to 800 angstroms, and it is possible to deposit the metal vapor deposition layer on the entire surface, one surface, or partially. Further, the vapor deposition surface may be top-coated for coloring or protection.

[0020]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto. The methods for measuring the physical properties shown in Examples and Comparative Examples and the criteria for evaluation are as follows. (1) Appearance of film: The appearance of the base film is visually observed, and when the film has no unevenness and good transparency and surface gloss, the compatibility is poor, and the film surface has unevenness and transparency. When the surface gloss was extremely poor, it was evaluated as x (poor appearance). (2) Winding: A film roll obtained by continuously winding a vapor-deposited film of a predetermined length is observed with the naked eye and shows no wrinkles or lumps, and when the film is pulled out, there is no local distortion or habit. Those that did not exist were evaluated as ○ (good winding appearance), and those that had wrinkles or lumps and had wrinkles or distortion or habit on the film when pulled out were rated as × (poor winding appearance).

(3) Laminating property (peeling strength): The vapor-deposited surface of the metal (aluminum) vapor-deposited film on one surface and the biaxially oriented polypropylene film (# 20) were bonded together using an adhesive for dry lamination, and 60 After aging at 3 ° C. for 3 days, the adhesive was completely dried and then cut into a width of 15 mm, and the 90 ° peel strength at the interface was measured by a tensile tester. (4) Slip property (dynamic friction coefficient): ASTM D 52
The slip property of the base film was shown by the coefficient of kinetic friction between the corona-treated surface and the non-treated surface of the base film measured by the method specified in 3. The smaller this value is, the better the slip property is. The slip property of the metal vapor deposition film can also be estimated by this measurement, and a coefficient of dynamic friction of 1.00 or less was considered good.

Examples 1-9, Comparative Examples 1-5 A crystalline ethylene-propylene-butene-1 terpolymer containing 2.5% by weight of ethylene and 4.5% by weight of butene-1 and having a melt flow rate (MFR). -PP) is 6.0, Tm is 1
An amorphous ethylene-propylene-diene copolymer shown in Table 1 (hereinafter sometimes referred to as EPDM) was added to 100 parts by weight of a polypropylene resin at 40 ° C. in the amount shown in the same table to prepare an antioxidant. As tetrakis- [methylene-3
0.10 parts by weight of-(3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane and 0.20 parts by weight of aluminum silicate as an anti-blocking agent were added, and the mixture was pelletized using an extruder. Caliber the pellet
Extruded at a melting temperature of 220 ℃ using a 65mmφ extruder and T-die, and rapidly cooled into a film with an air chamber and a cooling roll with a surface temperature of 30 ℃ so that the wetting index on one side of the film immediately becomes 40 dyn / cm. The film was wound while being subjected to corona discharge treatment to obtain a roll-shaped film having a thickness of 25 μm and a width of 60 cm. Width of this film using a slitter
After cutting it to 50 cm, it was set as a base film in a continuous vacuum evaporation system, and while continuously unwinding the film, aluminum was evaporated on the corona-treated surface of the film under a vacuum of 5 × 10 ⁻⁵ Torr and wound up, Thickness of evaporated film is about 350 Å (within ± 15 Å)
Length of single-sided aluminum vapor-deposited plastic film 2,
It was obtained in the form of a roll of 000 m. Table 1 shows the characteristics of the base film and the metal vapor-deposited film obtained in each Example and Comparative Example.

Examples 10 to 12 and Comparative Examples 6 to 8 In Example 1, instead of the crystalline ethylene-propylene-butene-1 terpolymer as the polypropylene resin, a crystalline ethylene-propylene copolymer (containing ethylene) was used. Amount of 2.5% by weight, MFR-PP 7, Tm 150 ° C.) and EPDM shown in Table 2 in the amounts shown in the same table, except that the amount shown in the same table is used. A plastic film was obtained. The characteristics are shown in Table 2.

Examples 13 to 15 and Comparative Examples 9 to 11 In Example 1, instead of the crystalline ethylene-propylene-butene-1 terpolymer as the polypropylene resin, a crystalline homopolymer of propylene (MFR-PP). 8, T
m162 ° C.) and EPDM shown in Table 3 were used in the amounts shown in the same table to obtain a rolled single-sided aluminum vapor-deposited plastic film in accordance with Example 1. The characteristics are shown in Table 3. As is clear from Tables 1 to 3, the plastic film obtained from the composition defined in the present invention and the metal vapor-deposited film thereof have excellent properties, but the film of the comparative example has any of the properties. It turns out that it is significantly inferior.

Examples 16-22, Comparative Examples 12-17 A crystalline ethylene-propylene-butene-1 terpolymer having 2.5% by weight of ethylene and 4.5% by weight of butene-1 and having a melt flow rate (MFR). -PP) is 6.0 Tm is 140
100 parts by weight of polypropylene resin at 40 ° C, tetrakis- [methylene-3- (3 ', 5'-di-
t-Butyl-4'-hydroxyphenylpropionate] methane (0.10 parts by weight) and aluminum silicate (0.02 parts by weight) as a blocking resistance were added, and the mixture was pelletized using an extruder. This pellet-shaped polypropylene resin 100
To the parts by weight, EPDM and polyethylene resin shown in Table 4 were blended at the parts by weight shown in the same table and dry blended with a blender, and the resulting composition was used with an extruder having a diameter of 65 mmφ and a T-die. It is extruded at a melting temperature of 220 ° C, rapidly cooled with an air chamber and a cooling roll with a surface temperature of 30 ° C to form a plastic film, which is immediately wound on one side with corona discharge treatment so that the wetting index becomes 40 dyn / cm. A roll-shaped film having a thickness of 25 μm and a width of 60 cm was prepared. Width of this film is 50 using a slitter.
After cutting it into cm, set it as a base film in a continuous vacuum vapor deposition device, and while continuously unwinding the film, vapor-deposit aluminum under the vacuum of 5 × 10 ^-5 Torr on the corona-treated surface of the film and wind it up. The thickness of the deposited film is about
350 Å (within ± 15 Å) single-sided aluminum vapor-deposited plastic film with a length of 2.00
It was obtained in a roll shape of 0 m. Examples 16 to 22 and Comparative Example 12
Table 5 shows the characteristics of the films and the metal vapor-deposited films obtained in Nos. 17 to 17. As is clear from Table 5, the vapor-deposited film made of the composition to which the polyethylene resin and the non-crystalline ethylene-propylene-diene copolymer (EPDM) are added is excellent in all properties, but It can be seen that the vapor-deposited film of the example is inferior in any of the properties and is not preferable. As shown in Tables 1 to 5, the printability of the film vapor deposition surface was good in all respects and there was no problem.

[0026]

The metal-deposited plastic film according to the present invention uses a plastic film mainly composed of polypropylene resin as its base film, but has a specific amount of the amorphous ethylene-propylene-diene copolymer. By blending, and by further blending a specific amount of polyethylene resin into the composition,
It has an adhesive strength between the base film and the vapor-deposited film and a beautiful metallic luster on the vapor-deposited surface, and has excellent printability and laminating property on the vapor-deposited surface, which makes it suitable for use in packaging, decoration, etc. I can.

[0027]

[Table 1]

[0028]

[Table 2]

[0029]

[Table 3]

[0030]

[Table 4]

[0031]

[Table 5]

Claims (4)

[Claims] 1. A metal-deposited plastic film in which a metal is vapor-deposited on a base film obtained by using a composition in which 100 parts by weight of a polypropylene resin is blended with 2 to 20 parts by weight of an amorphous ethylene-propylene-diene copolymer. . 2. Polyethylene resin 1 to 1 having a density of 0.930 g / cm ³ or more per 100 parts by weight of polypropylene resin.
A metal-deposited plastic film in which a metal is vapor-deposited on a base film obtained by using a composition containing 0 part by weight and 2 to 20 parts by weight of an amorphous ethylene-propylene-diene copolymer. 3. The ratio of the melt flow rate of polypropylene resin (MFR-PP) and the melt flow rate of polyethylene resin (MFR-PE) is expressed by the following equation: 0.5 ≦ MFR-PE / MFR-PP. The metal-deposited plastic film according to claim 2, wherein a polypropylene resin and a polyethylene resin that satisfy the requirements are used. 4. An amorphous ethylene-propylene-diene copolymer having an ethylene content of at least 30% by weight and a Mooney viscosity of ML _{1 + 4} (100 ° C.) of 90 or less is used. Item 4. A metal-deposited plastic film according to any one of items 3.