KR101706748B1 - Ethylene vynyl acetate resin composition and adhesive film using the same - Google Patents
Ethylene vynyl acetate resin composition and adhesive film using the same Download PDFInfo
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- KR101706748B1 KR101706748B1 KR1020150070374A KR20150070374A KR101706748B1 KR 101706748 B1 KR101706748 B1 KR 101706748B1 KR 1020150070374 A KR1020150070374 A KR 1020150070374A KR 20150070374 A KR20150070374 A KR 20150070374A KR 101706748 B1 KR101706748 B1 KR 101706748B1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/22—Thermoplastic resins
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Abstract
TECHNICAL FIELD The present invention relates to an ethylene vinyl acetate resin composition having a high adhesive strength to a material such as paper or aluminum and having reduced stickiness and improved workability, and an adhesive film using the same.
Description
The present invention relates to an ethylene vinyl acetate resin composition and an adhesive film using the same. More particularly, the present invention relates to an ethylene vinyl acetate resin composition having a high adhesive strength to a material such as paper and aluminum, and having reduced stickiness to improve workability, and an adhesive film using the same.
Ethylene vinyl acetate (EVA) resin is one of polyethylene-based polar resins and is a copolymer resin produced by polymerization of ethylene monomer and vinyl acetate monomer. Ethylene vinyl acetate resins have high flexibility, optical properties and adhesiveness and are used in various industrial applications such as shoes, adhesives, coatings, wires, flame retardant compounds, and photovoltaics, in addition to plastic films, sheets and molded products.
In particular, ethylene vinyl acetate resins are often used for high-speed extrusion coating because of their excellent adhesion strength to various materials. The extrusion coating method is a method of not only protecting a material but imparting new functionality by extruding and coating a resin to be coated on a material such as OPP (Oriented Polypropylene), PET (Polyethylene Terephthalate), and paper to be coated.
Ethylene vinyl acetate resin for extrusion coating is mainly divided into food packaging and industrial use. The food package generally has a multi-layered structure, for example, OPP / print layer / adhesive layer / aluminum-deposited CPP structure. At this time, the ethylene vinyl acetate resin may be placed in the adhesive layer and used to realize the adhesive force between the printing layer and the aluminum CPP layer. For industrial use, ethylene vinyl acetate resin is coated on OPP or PET film. Ethylene vinyl acetate resin can be used for bonding film to paper such as magazine or flyer.
On the other hand, in the field of extrusion coating recently, technology development is being carried out in order to reduce the coating thickness as much as possible while realizing a rapid extrusion coating speed for cost reduction. However, when the coating thickness is reduced as described above, there is a limit such as a decrease in the adhesive strength of the ethylene vinyl acetate resin.
To solve this problem, there has been proposed a method of adding a petroleum resin as a tackifier of an ethylene vinyl acetate resin. In this case, however, adhesion between the coating films occurs in the coating roll used in the extrusion coating process, Defects or the like.
Accordingly, there is a demand for development of an ethylene vinyl acetate resin composition having high adhesion to materials such as paper and aluminum, and having reduced stickiness and improved processability.
An object of the present invention is to provide an ethylene vinyl acetate resin composition having a high adhesive strength to a material such as paper or aluminum and having reduced stickiness to improve workability.
The present invention also provides an adhesive film using the ethylene vinyl acetate resin composition.
In this specification, ethylene vinyl acetate resin; A thermoplastic resin having a weight average molecular weight of 500 g / mol to 5,000 g / mol; And an amide compound having a weight average molecular weight of 200 g / mol to 1,000 g / mol.
Also disclosed herein is a binder resin comprising an ethylene vinyl acetate resin and a thermoplastic resin having a weight average molecular weight of 500 g / mol to 5,000 g / mol; And an amide compound having a weight average molecular weight of 200 g / mol to 1,000 g / mol dispersed on the surface of the binder resin
Hereinafter, the ethylene vinyl acetate resin composition and the adhesive film using the ethylene vinyl acetate resin composition according to a specific embodiment of the present invention will be described in detail.
In the present specification, (meth) acrylic acid ester is meant to include both acrylic acid ester and methacrylic acid ester.
According to one embodiment of the invention, an ethylene vinyl acetate resin; A thermoplastic resin having a weight average molecular weight of 500 g / mol to 5,000 g / mol; And an amide compound having a weight average molecular weight of 200 g / mol to 1,000 g / mol, may be provided.
The present inventors have found that when the above-mentioned specific ethylene vinyl acetate resin composition is used, it is possible to have a high adhesive strength to a material such as paper and aluminum by using a resin blend prepared by mixing an ethylene vinyl acetate resin and a specific thermoplastic resin as a substrate, Accordingly, it has been confirmed through experiments that the adhesive strength can be realized even when the thickness is thin when applied to the extrusion coating process, and the invention is completed.
Further, when an ethylene vinyl acetate resin composition in which an amide compound is dispersed on the surface of a resin blend base obtained by mixing the ethylene vinyl acetate resin and a thermoplastic resin is used, when only the resin blend obtained by mixing the ethylene vinyl acetate resin and the thermoplastic resin is used , It was confirmed that the roll adhesion between the coating films was greatly reduced when applied to the extrusion coating process, and the processability was improved, and high-speed thin film work was possible, thereby improving the process efficiency.
In addition, the ethylene vinyl acetate resin composition of the embodiment can maintain an excellent adhesive strength equal to or higher than that of a material such as paper and aluminum as compared with the resin blend obtained by mixing the ethylene vinyl acetate resin and the thermoplastic resin, It was confirmed through experiment that the excellent adhesive force can be realized even with a thin thickness, and the invention is completed.
Specifically, the ethylene vinyl acetate resin composition may include an ethylene vinyl acetate resin. The ethylene vinyl acetate resin is a copolymer resin obtained by polymerizing an ethylenic monomer and a vinyl acetate monomer, and can realize high flexibility, optical properties, and adhesiveness.
The ethylene vinyl acetate resin may include an ethylene-based repeat unit and a vinyl acetate-based repeat unit. The ethylene-based repeating unit means a repeating unit derived from the ethylene monomer, and may mean a repeating unit represented by the following formula (1).
[Chemical Formula 1]
In Formula 1, n is an integer of 1 or more.
The vinyl acetate-based repeating unit means a repeating unit derived from the vinyl acetate monomer, and may mean a repeating unit represented by the following formula (2).
(2)
In Formula 1, m is an integer of 1 or more.
The ethylene vinyl acetate resin may include 15% by weight to 40% by weight of vinyl acetate based repeating units.
The ethylene vinyl acetate resin has a melt index (190 占 폚, 2.16 kg) of 10 g / 10 min to 100 g / 10 min, or 12 g / 10 min to 50 g / 10 min, or 15 g / 10 min to 30 g / . Accordingly, the ethylene vinyl acetate resin can be applied to the extrusion coating field to realize excellent processability and adhesive force.
For example, an orifice of 2.096 mm is placed in a cylinder of a melt index measuring instrument set at 190 占 폚, then 4 to 5 g of ethylene vinyl acetate resin is filled, and the inside of the cylinder The piston was put and a weight of 2.16 kg was put on the ethylene vinyl acetate resin, and a load was added to the ethylene vinyl acetate resin. The ethylene vinyl acetate resin in the cylinder was preheated for about 5 minutes, and the amount of ethylene vinyl acetate resin passed for 1 minute was measured. A method of converting the amount passed may be used.
The ethylene vinyl acetate resin composition may include a thermoplastic resin having a weight average molecular weight of 500 g / mol to 5,000 g / mol.
The ethylene vinyl acetate resin and the thermoplastic resin having a weight average molecular weight of 500 g / mol to 5,000 g / mol may be mixed and mixed with each other to form a resin blend.
The weight ratio of the ethylene vinyl acetate resin to the thermoplastic resin may be from 1: 2 to 1:10, or from 1: 4 to 1: 8, or from 1: 5 to 1: 7. If the weight ratio of the ethylene vinyl acetate resin to the thermoplastic resin is less than 1: 2, the mechanical properties of the ethylene vinyl acetate resin composition may be deteriorated and the processability may be deteriorated. If the weight ratio of the ethylene vinyl acetate resin to the thermoplastic resin is more than 1:10, it may be difficult to realize the effect of improving the adhesion by the thermoplastic resin.
The thermoplastic resin may include a polymer of an aliphatic olefin monomer having 2 to 30 carbon atoms, a polymer of an aromatic olefin monomer having 6 to 60 carbon atoms, a polymer of an aliphatic olefin monomer having 2 to 30 carbon atoms and an aromatic olefin monomer having 6 to 60 carbon atoms have.
The aliphatic olefin monomer having 2 to 30 carbon atoms is preferably a chain aliphatic olefin monomer having 2 to 10 carbon atoms, a cyclic aliphatic olefin monomer having 3 to 20 carbon atoms, an aliphatic (meth) acrylic acid ester having 2 to 30 carbon atoms, And mixtures thereof.
Examples of the chain type aliphatic olefin monomer having 2 to 10 carbon atoms include isoprene, piperylene, and the like.
Examples of the cyclic aliphatic olefin monomer having 3 to 20 carbon atoms include 1,3-cyclopentadiene, dicyclopentadiene, H2-dicyclopentadiene, etc. .
Examples of the aliphatic (meth) acrylic esters having 2 to 30 carbon atoms include the compounds represented by the following formula (3).
(3)
In Formula 3, R 1 is a linear or branched alkyl group having 1 to 20 carbon atoms.
The aromatic olefin monomer having 6 to 60 carbon atoms may include an aromatic (meth) acrylic acid ester having 6 to 60 carbon atoms. Examples of the aromatic (meth) acrylic acid esters having 6 to 60 carbon atoms are not particularly limited, but include, for example, compounds represented by the following general formula (4).
[Chemical Formula 4]
In Formula 4, R 2 is an aryl group having 6 to 50 carbon atoms.
More specifically, examples of the polymer of dicyclopentadiene or dicyclopentadiene, which is a cyclic aliphatic olefin monomer having 3 to 20 carbon atoms, include SU110, SU120 and SU130 resins .
Examples of the polymer of the isoprene which is a chain type aliphatic olefin monomer and the cyclic aliphatic olefin monomer, 1,3-cyclopentadiene, include A-1115 resin, and the cyclic aliphatic olefin monomer, 1,3-cyclopentene Examples of polymers of dienes and aliphatic (meth) acrylic acid esters or aromatic (meth) acrylic acid esters include PX-95 resins.
The softening point of the thermoplastic resin measured by ASTM E 28 may be from 95 캜 to 135 캜. The softening point means a temperature at which the material begins to undergo strain and softening by heating.
Also, the ethylene vinyl acetate resin composition may contain an amide compound having a weight average molecular weight of 200 g / mol to 1,000 g / mol, or 250 g / mol to 700 g / mol, or 270 g / mol to 600 g / mol can do. The amide-based compound contains at least one aliphatic chain having 15 to 50 carbon atoms in the molecule, so that the adhesion of the adhesive film produced by extrusion coating the ethylene vinyl acetate resin composition can be prevented.
The amount of the amide compound may be 0.02 to 0.5 parts by weight, or 0.04 to 0.3 parts by weight, or 0.05 to 0.2 parts by weight based on 100 parts by weight of the ethylene vinyl acetate resin and the thermoplastic resin. When the content of the amide compound is too high, the adhesive force may be decreased while causing the color change of the ethylene vinyl acetate resin composition. When the content of the amide compound is too low, The effect may be difficult to implement.
The amide compound may include a monoamide compound having 10 to 50 carbon atoms or a diamide compound having 30 to 100 carbon atoms.
The monoamide compound having 10 to 50 carbon atoms may include a main chain containing a saturated or unsaturated aliphatic chain having 10 to 50 carbon atoms and an amide functional group bonded to the end of the main chain.
The saturated aliphatic chain having 10 to 50 carbon atoms does not include a double bond or a triple bond in the chain and the unsaturated aliphatic chain having 10 to 50 carbon atoms may contain at least one double bond or triple bond in the chain .
Specifically, examples of the monoamide compound having a main chain containing a saturated aliphatic chain having 10 to 50 carbon atoms and an amide functional group bonded to the end of the main chain include stearamide, and an unsaturated aliphatic chain having 10 to 50 carbon atoms And an amide functional group bonded to the end of the main chain is exemplified by oleamide.
The diamide compound having 30 to 100 carbon atoms may include a compound represented by the following formula (5).
[Chemical Formula 5]
In Formula 5, R 3 is an alkylene group having 1 to 10 carbon atoms, and R 4 and R 5 are each independently a saturated or unsaturated aliphatic functional group having 10 to 50 carbon atoms.
R 4 and R 5 may be the same or different from each other.
Examples of the alkylene group having 1 to 10 carbon atoms are not particularly limited, and examples thereof include a methylene group, an ethylene group and a propylene group, and an ethylene group can be preferably used.
The saturated aliphatic functional group having 10 to 50 carbon atoms does not contain a double bond or a triple bond in the functional group and the unsaturated aliphatic functional group having 10 to 50 carbon atoms may contain at least one double bond or triple bond in the functional group .
Examples of the saturated aliphatic functional group having 10 to 50 carbon atoms include an alkyl group having 10 to 50 carbon atoms, and examples of the unsaturated aliphatic functional group having 10 to 50 carbon atoms include an alkenyl group having 10 to 50 carbon atoms.
Specifically, examples of the diamide compound in which R 3 is an ethylene group and R 4 and R 5 are an alkyl group having 10 to 50 carbon atoms include ethylenebisstearamide, and R 3 is an ethylene group , And R 4 and R 5 are an alkenyl group having 10 to 50 carbon atoms.
According to another embodiment of the present invention, there is provided a binder resin comprising an ethylene vinyl acetate resin and a thermoplastic resin having a weight average molecular weight of 500 g / mol to 5,000 g / mol; And an amide compound having a weight average molecular weight of 200 g / mol to 1,000 g / mol dispersed on the surface of the binder resin.
The content of the ethylene vinyl acetate resin, the thermoplastic resin and the amide compound includes the above-mentioned contents in relation to the above embodiment.
Due to the amide compound dispersed on the surface of the binder resin, the adhesive film can reduce the adhesion of the adhesive films to each other, thereby improving the workability in the adhesive film coating process and enabling high-speed thin film processing. Efficiency can also be improved.
The thickness of the adhesive film may be 0.1 탆 to 15 탆, or 5 탆 to 11 탆. If the thickness of the adhesive film is excessively increased to more than 15 占 퐉, the manufacturing cost may increase and the efficiency of the process may decrease.
The adhesive film may have an adhesive strength of 100 gf / 15 mm to 500 gf / 15 mm or 150 gf / 15 mm to 300 gf / 15 mm as measured by ASTM D1876.
The adhesive force of the adhesive film may be 30 gf / 15 mm to 200 gf / 15 mm or 50 gf / 15 mm to 150 gf / 15 mm as measured by ASTM D1876.
The adhesive film may have a roll tackiness as measured by ASTM D1876 of 20 gf / 50 mm to 200 gf / 50 mm, or 25 gf / 50 mm to 150 gf / 50 mm.
For example, a method of applying the ethylene vinyl acetate resin composition of the one embodiment to the parent material may be used. Examples of the base material are not limited, and various materials can be used without limitation. Examples of the coating method are not limited, but an extrusion coating method can be used, for example.
Examples of the extrusion coating method include a step of extruding and melting an ethylene vinyl acetate resin composition of the above embodiment by an extrusion molding machine and applying the resultant on a base material.
INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide an ethylene vinyl acetate resin composition having high adhesion to materials such as paper, aluminum and the like while reducing stickiness and improving workability, and an adhesive film using the same.
The invention will be described in more detail in the following examples. However, the following examples are illustrative of the present invention, and the present invention is not limited by the following examples.
< Example 1 to 15: ethylene vinyl acetate ( EVA ) Preparation of Resin Composition >
An ethylene vinyl acetate (EVA) resin composition was prepared by mixing ethylene vinyl acetate (EVA), a thermoplastic resin and an anti-sticking agent in a twin-screw extruder (19 mm) having a temperature of 60 to 140 ° C so as to satisfy the contents shown in Table 1 .
Hanwha EVA 1157 (melt index (MI) 16 g / 10 min (190 DEG C, 2.16 kg)) having a vinyl acetate content of 18% was used as the ethylene vinyl acetate (EVA). The thermoplastic resin was C5- (Molecular Weight: 3,950 g / mol), PX-95 (Molecular Weight: 720 g / mol), Hydrogenated DCPD SU-110 (Molecular Weight: 670 g / mol) g / mol) was used. Crodamide EBO (Ethylenebisoleamide, molecular weight: 588 g / mol) manufactured by Croda was used as the anti-adhesion agent.
< Comparative Example 1 to 6: ethylene vinyl acetate ( EVA ) Preparation of Resin Composition >
As shown in the following Table 2, except that the content of ethylene vinyl acetate (EVA), thermoplastic resin and anti-sticking agent used in the reaction was different, the ethylene vinyl acetate (EVA) resin composition was prepared Respectively.
< Experimental Example : Example And In the comparative example The obtained ethylene vinyl acetate ( EVA ) Measurement of physical properties of resin composition >
The properties of the ethylene vinyl acetate (EVA) resin composition obtained in the above Examples and Comparative Examples were measured by the following methods, and the results are shown in Tables 1 and 2, respectively.
1. Adhesion ( gf / 15 mm)
1-1. Paper adhesion
The ethylene vinyl acetate (EVA) resin composition obtained in the above Examples and Comparative Examples was put into a pilot coating equipment (60 mm single screw extruder, L / D = 30.5, 650 mm die) and extruded at a temperature of 140 to 230 캜, , And screw rotation speed of 20 rpm, the extrusion coating was carried out on the OPP film base material. At this time, the thickness of the coating layer was 10 mu m.
Thereafter, paper was laminated on the ethylene vinyl acetate (EVA) resin composition extrusion coated on the OPP film using a laminating machine at a temperature of 100 ° C, and peel strength was measured by a peel test according to ASTM D1876 And the paper adhesion was confirmed.
1-2. Aluminum adhesion
The ethylene vinyl acetate (EVA) resin compositions obtained in the above Examples and Comparative Examples were laminated in the molding press in the order of Al, EVA resin composition and Al under the conditions of 150 deg. C / 40 bar / 30 sec and peeled test according to ASTM D1876 ), And the aluminum adhesion was confirmed.
2. Roll stickiness ( gf / 50 mm)
The coating rolls used in the extrusion coating process were stored at 40 DEG C and 5 bar pressure for 7 days, and peel strengths were measured between the films inside the rolls through a peel test according to ASTM D1876, Respectively.
The composition of the resin of the Example and the results of the experimental example are shown in Table 1 below
(gf / 15 mm)
(gf / 50 mm)
* The content of the antistatic agent is based on 100 parts by weight of the EVA resin and the thermoplastic resin.
The composition of the comparative resin and the results of the experimental examples are shown in Table 2 below
(gf / 15 mm)
(gf / 50 mm)
* The content of the antistatic agent is based on 100 parts by weight of the EVA resin and the thermoplastic resin.
As shown in Tables 1 and 2, in Comparative Example 1 which did not contain any thermoplastic resin, the adhesive strength to paper and aluminum (Al) was 29 gf / 15 mm and 15 gf / 15 mm, respectively, Lt; RTI ID = 0.0 > 1 to 15 < / RTI > containing resin.
That is, it can be confirmed that the ethylene vinyl acetate (EVA) resin composition of Examples 1 to 15 contains a thermoplastic resin in a certain amount, thereby achieving high adhesive strength to paper or metal materials.
On the other hand, in order to compare the effects of using the anti-sticking agent, Examples 1 to 3 and Comparative Example 2 were compared. In Examples 1 to 3 using the anti-sticking agent, the rolls of 30 gf / 50 mm to 56 gf / In the case of Comparative Example 2 in which an anti-sticking agent was not used, the roll stickiness was measured as high as 62 gf / 50 mm.
This was confirmed in the experimental results of Examples 4 to 6 and Comparative Example 3, Examples 7 to 9 and Comparative Example 4, Examples 10 to 12 and Comparative Example 5, and Examples 13 to 15 and Comparative Example 6 .
Accordingly, the ethylene vinyl acetate (EVA) resin compositions of Examples 1 to 15, which further include an anti-sticking agent together with a thermoplastic resin, show that adhesion can be achieved at a certain level or higher, I could.
Claims (17)
The content of the amide compound is from 0.02 to 0.5 parts by weight based on 100 parts by weight of the ethylene vinyl acetate resin and the thermoplastic resin,
The amide compound includes a diamide compound having 30 to 100 carbon atoms,
Wherein the diamide compound having 30 to 100 carbon atoms comprises a compound represented by the following formula (5): < EMI ID =
[Chemical Formula 5]
In Formula 5, R 3 is an alkylene group having 1 to 10 carbon atoms, and R 4 and R 5 are each independently a saturated or unsaturated aliphatic functional group having 10 to 50 carbon atoms.
Wherein the weight ratio of ethylene vinyl acetate resin to said thermoplastic resin is 1: 2 to 1:10.
Wherein the thermoplastic resin comprises a polymer of at least one monomer selected from the group consisting of an aliphatic olefin monomer having 2 to 30 carbon atoms and an aromatic olefin monomer having 6 to 60 carbon atoms.
The aliphatic olefin monomer having 2 to 30 carbon atoms is preferably selected from the group consisting of a chain aliphatic olefin monomer having 2 to 10 carbon atoms, a cyclic aliphatic olefin monomer having 3 to 20 carbon atoms and an aliphatic (meth) acrylic acid ester having 2 to 30 carbon atoms ≪ / RTI > by weight of the ethylene vinyl acetate resin composition.
Wherein the aromatic olefin monomer having 6 to 60 carbon atoms comprises an aromatic (meth) acrylic acid ester having 6 to 60 carbon atoms.
Wherein the thermoplastic resin has a softening point of 95 占 폚 to 135 占 폚 as measured by ASTM E28.
Wherein the ethylene vinyl acetate resin comprises 15% by weight to 40% by weight of vinyl acetate-based repeating units.
Wherein the ethylene vinyl acetate resin has a melt index (190 DEG C, 2.16 kg) of 10 g / 10 min to 100 g / 10 min.
The content of the amide compound is from 0.02 to 0.5 parts by weight based on 100 parts by weight of the ethylene vinyl acetate resin and the thermoplastic resin,
The amide compound includes a diamide compound having 30 to 100 carbon atoms,
Wherein the diamide compound having 30 to 100 carbon atoms comprises a compound represented by Formula 5:
[Chemical Formula 5]
In Formula 5, R 3 is an alkylene group having 1 to 10 carbon atoms, and R 4 and R 5 are each independently a saturated or unsaturated aliphatic functional group having 10 to 50 carbon atoms.
Wherein the adhesive film has a thickness of 0.1 mu m to 15 mu m.
Wherein the adhesive force to paper measured by ASTM D1876 is 100 gf / 15 mm to 500 gf / 15 mm.
Wherein the adhesive force to aluminum measured by ASTM D1876 is 30 gf / 15 mm to 200 gf / 15 mm.
Wherein the roll tackiness measured by ASTM D1876 is 20 gf / 50 mm to 200 gf / 50 mm.
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