JP2000178524A - Adherent polymer composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide adherent polymer compositions excellent in molding processability and, in addition, excellent in the initial adhesion to a substrate and its heat resistance. SOLUTION: This adherent polymer composition comprises (A) 50-99 wt.% ethylenic polymer having a dynamic viscosity (η*) by shear strain at 190 deg.C at an angular velocity of 100 rad/sec of not less than 800 Pa.s, a density of 0.850-0.950 g/cm3, a melt flow rate of 0.01-50 g/10 min and (B) 50-1 wt.% tackifier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive polymer composition which is excellent in moldability and processability, and has excellent initial adhesive strength to a substrate and its heat resistance. The present invention relates to an adhesive polymer composition suitable for obtaining a resin laminate.

[0002]

2. Description of the Related Art Conventionally, various resins such as polyamide resin, polyester resin, saponified ethylene-vinyl acetate copolymer, polyolefin resin, polycarbonate resin, and polystyrene resin have been used as food packaging materials. Utilizing the properties of the above, it is used in various applications in the form of a laminate in which one of the resins is used as a base material and a different kind of resin is laminated thereon.

[0003] The laminating method includes a glue laminating method in which a base film or sheet and a different kind of resin film or sheet are adhered to each other with an adhesive to form a laminate, and an anchor coating agent is applied to the base film or sheet. Extrusion lamination method of extruding and laminating dissimilar resins to form a laminate, coextrusion lamination method of forming a laminate by coextruding and laminating an adhesive resin and dissimilar resin on a base film or sheet, and bonding to a base material There is an extrusion lamination method such as a co-extrusion method of co-extruding a conductive resin and a different resin to form a laminate,
The former glue lamination method is excellent in initial adhesive strength and its heat resistance, but has the problem of low productivity. On the other hand, the latter extrusion lamination method has the advantage of high productivity, but has the heat resistance of adhesive force. Inferior in durability, for example, as a material for food packaging, at the time of thermoforming into containers, etc., at the time of filling the contents at high temperature,
Or at the time of high temperature treatment such as boiling sterilization or retort treatment,
The problem of delamination often arises.

On the other hand, in order to improve the heat resistance of the adhesive force in the latter method, an ethylene polymer and / or an unsaturated carboxylic acid or a derivative thereof modified ethylene polymer, a tackifier, and an aromatic agent It has been proposed to use an adhesive resin composition comprising a vinyl compound and a conjugated diene compound block copolymer (JP-A-7-20708).
See No. 2 publication. ), However, has not yet been able to satisfy the heat resistance.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention has been made to solve problems such as heat resistance and durability of adhesive strength in a laminate by an extrusion lamination method, particularly a co-extrusion method. Therefore, an object of the present invention is to provide an adhesive polymer composition which is excellent in moldability, and also has excellent initial adhesive strength to a substrate and excellent heat resistance.

[0006]

Means for Solving the Problems The present inventors have solved the above problems.
As a result of intensive studies to solve the
That the polymer composition using the body can achieve the above object
Having arrived at the present invention, namely the present invention,
Adhesive polymerization containing component (A) and component (B)
Body composition. (A) At a temperature of 190 ° C. and an angular velocity of 100 rad / sec.
Dynamic viscosity due to shear deformation (η^*) Is 800 Pa · sec
As described above, the density is 0.850 to 0.950 g / cm. ^Three, Mel
Ethylene with a flow rate of 0.01 to 50 g / 10 min
-Based polymer: 50 to 99% by weight (B) tackifier: 50 to 1% by weight

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The ethylene polymer as the component (A) constituting the adhesive polymer composition of the present invention has a complex shear modulus G as a function of angular velocity in dynamic viscoelasticity measurement under shear deformation. ^* = G ′ + iG ″ [where G ^* is the complex shear modulus, G ′ is the storage shear modulus, G ″ is the loss shear modulus,
i is the square root of -1. ], The temperature 1
Dynamic viscosity (η) obtained by dividing the loss shear modulus (G ″) at 90 ° C. and angular velocity (ω) of 100 rad / sec by the angular velocity (ω).
^* = G ″ / ω) is essential to be 800 Pa · sec or more, and preferably 1000 Pa · sec or more. If the dynamic viscosity is less than the above range, the adhesive polymer composition will have poor adhesive heat resistance.

The ethylene polymer of the component (A) in the present invention has a density of 0.850 to 0.950 g / c.
m ³ and a melt flow rate of 0.01 to 50 g / 10 minutes are indispensable, and in order to satisfy the above range of the dynamic viscosity, the ethylene polymer of the component (A) contains ethylene, 1-hexene, 4-methyl-1-hexene, 1
-C6 to C7 such as heptene, 1-octene and 1-decene
Consisting of 12 α-olefins and having a density of 0.850-
0.915 g / cm ³ , melt flow rate 0.01
It is preferable that the main component be an ethylene-α-olefin copolymer having a weight of up to 5.0 g / 10 minutes.

Further, the ethylene-α-olefin copolymer is copolymerized in the presence of a metallocene catalyst, rather than in the presence of a conventionally widely used Ziegler-Natta catalyst or the like. Preferably, it is

An ethylene-α-olefin copolymer using a metallocene catalyst is disclosed, for example, in JP-A-58-19309.
Nos. 59-95292, 60-35005, 60-35006, 60-35007, 60-
No. 35008, No. 60-35009, No. 61-130
No. 314, Japanese Patent Application Laid-Open No. H3-163088, European Patent Publication No. 420436, U.S. Pat.
No. 8, and a metallocene-based catalyst, particularly a metallocene-alumoxane-based catalyst, described in WO91 / 04257 and the like, or described in, for example, WO92 / 01723 and the like. Using a catalyst comprising a metallocene compound and a compound that reacts with the compound to form a stable anion, for example, a polymerization method such as a gas phase method, a slurry method, a solution method, and a high-pressure ionic polymerization method; It can be manufactured legally.

In the present invention, in addition to the ethylene-α-olefin copolymer, low-, medium-, and high-density polyethylenes (branched or linear) A) ethylene homopolymer, and a copolymer of ethylene with a vinyl compound such as vinyl acetate, acrylic acid, methacrylic acid, acrylate, and methacrylate, and the ethylene-α-olefin copolymer Other than, for example, ethylene and propylene,
1-butene, 3-methyl-1-butene, 1-pentene,
An α-olefin having 3 to 5 carbon atoms such as 4-methyl-1-pentene and 4,4-dimethyl-1-pentene;
It may contain a copolymer with an α-olefin having 13 to 18 carbon atoms, such as octadecene.

The tackifier of component (B) constituting the adhesive polymer composition of the present invention is generally used as a tackifier resin in the fields of pressure-sensitive adhesive tapes, hot melt adhesives, and paints. A non-crystalline resin that is solid at room temperature, specifically, for example, aliphatic, aromatic, aliphatic-aromatic petroleum resins, and hydrogenated petroleum resins, natural rosins, and polymerization. Rosin resins such as rosin, and rosin resins obtained by hydrogenating them, polyterpene resins, terpene resins such as terpene phenol resins, and terpene resins obtained by hydrogenating them, and cumarone indene resins, and Coumarone indene-based resins obtained by hydrogenating them are exemplified.

The adhesive polymer composition of the present invention comprises, as essential components, the ethylene polymer as the component (A) and the tackifier as the component (B). 50) to 99% by weight of the component (B)
It is essential that the content of the first component (A) is 60 to 95% by weight, and the content of the second component (B) is 40 to 5% by weight.

If the former component (A) is less than the above range and the latter component (B) is more than the above range, the moldability of the adhesive polymer composition is reduced, and the composition becomes sticky and the handleability is increased. On the other hand, when the former (A) component is beyond the above range and the latter (B) component is below the above range,
It becomes difficult to develop sufficient adhesiveness as an adhesive polymer composition.

The adhesive polymer composition of the present invention further comprises an aromatic vinyl compound-conjugated diene compound in addition to the components (A) and (B) in order to further increase the heat resistance of the adhesive force. The block copolymer or its hydrogenated product (C) component is contained in an amount of 5 to 100 parts by weight, particularly 20 to 50 parts by weight based on 100 parts by weight of the total amount of the components (A) and (B). Is preferred.

Here, the aromatic vinyl compound-conjugated diene compound block copolymer is a linear block composed of a polymer block mainly composed of an aromatic vinyl compound and a polymer block mainly composed of a conjugated diene compound. , Branched, radial, or a block copolymer having a molecular structure of a combination thereof, and the hydrogenated product is a hydrogenated double bond of the latter polymer block of the block copolymer. is there. In the present invention, for example, these modified products by maleic anhydride or the like are also included.

Here, as the aromatic vinyl compound, styrene, α-methylstyrene, p-methylstyrene, dimethylstyrene, vinylnaphthalene, bromostyrene,
Examples thereof include divinylbenzene, among which styrene is preferable. As the conjugated diene compound, butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-
1,3-butadiene and the like, among which butadiene,
Isoprene or a combination of both is preferred.

In the present invention, the content of the aromatic vinyl compound unit in the aromatic vinyl compound-conjugated diene compound block copolymer is 10 to 50% by weight, particularly 20 to 40% by weight. Preferably, the hydrogenation rate of the double bond of the conjugated diene compound block of the hydrogenated block copolymer is 80% or more, particularly preferably 90% or more. The molecular weight of these block copolymers is 10,000 to 200,000 in number average molecular weight, particularly 30,000 to 1
It is preferable that the number is 0,000.

Further, the adhesive polymer composition of the present invention is used in the above (A) in order to further increase the heat resistance of the adhesive force to a higher temperature.
The component (B) and the unsaturated carboxylic acid or its derivative-modified ethylene polymer (D) are further added to the component (B) in an amount of 5 to 10 parts by weight based on 100 parts by weight of the total of components (A) and (B).
It is preferably contained in an amount of 0 parts by weight, particularly preferably 10 to 40 parts by weight.

Here, the unsaturated carboxylic acid or its derivative-modified ethylene polymer is obtained by subjecting the ethylene polymer to a graft reaction condition using an unsaturated carboxylic acid or its derivative as a modifier. It was done.

Specific examples of the unsaturated carboxylic acid or derivative thereof as the modifier include acrylic acid, methacrylic acid, crotonic acid, isocrotonic acid, maleic acid, and the like.
Unsaturated carboxylic acids such as fumaric acid, itaconic acid, citraconic acid, and tetrahydrophthalic acid, or anhydrides thereof, acid halides, amides, imides, esters and the like, and derivatives thereof, among which are unsaturated dicarboxylic acids or anhydrides thereof , Especially maleic acid or its anhydride, is preferred. Examples of the ethylene polymer to be modified include the same ones as described in the component (A).

The conditions for the graft reaction include, for example, di-t-butyl peroxide, t-butyl cumyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxide). Oxy) hexane, 2,
Dialkyl peroxides such as 5-dimethyl-2,5-di (t-butylperoxy) hexine-3, t-butylperoxyacetate, t-butylperoxybenzoate, t-butylperoxyisopropyl carbonate, 2, Peroxyesters such as 5-dimethyl-2,5-di (benzoylperoxy) hexane, 2,5-dimethyl-2,5-di (benzoylperoxy) hexyne-3, and diacyl peroxides such as benzoyl peroxide , Diisopropylbenzene hydroperoxide,
Organic peroxides such as hydroperoxides such as 2,5-dimethyl-2,5-di (hydroperoxy) hexane;
0.001 to 100 parts by weight of the ethylene polymer
A method of using about 10 to 10 parts by weight and reacting in a molten state or a solution state at a temperature of about 80 to 300 ° C. is employed.

The unsaturated carboxylic acid or its derivative-modified ethylene polymer as the component (D) in the present invention has an unsaturated carboxylic acid or its derivative unit content of 0.01 to 20.
%, Particularly preferably 0.1 to 10% by weight. If the content of the unsaturated carboxylic acid or a derivative unit thereof is less than the above range, the initial compounding purpose for the adhesive polymer composition cannot be achieved, while if the content is more than the above range, a gel or the like may be contained in the modified ethylene polymer. Is generated, which becomes fish eyes or bumps in the adhesive polymer composition, resulting in a decrease in adhesive strength and surface appearance.

The adhesive polymer composition of the present invention contains an ethylene polymer as the component (A), a tackifier as the component (B), and a tackifier as long as the object of the present invention is not impaired. ,
Other than the aromatic vinyl compound-conjugated diene compound block copolymer of component (C) or a hydrogenated product thereof, and the unsaturated carboxylic acid or derivative derivative-modified ethylene polymer of component (D) used as preferred embodiments, An olefin polymer such as a propylene polymer and other polymers may be contained, and further, if necessary, various commonly used additives, for example, antioxidants, light stabilizers, ultraviolet rays An absorbent, a nucleating agent, a neutralizing agent, a lubricant, an anti-blocking agent, a dispersant, a flow improver, a release agent, a flame retardant, a colorant, a filler, and the like may be added.

The adhesive polymer composition of the present invention comprises an ethylene polymer as the component (A), a tackifier as the component (B), and an aromatic vinyl compound-conjugate as the component (C). Materials such as diene compound block copolymer or its hydrogenated product, unsaturated carboxylic acid of component (D) or its derivative-modified ethylene-based polymer, etc., which are used as needed, additives, etc. are tumbled blender and ribbon blender. , V-type blender, Henschel mixer, etc., and then melt-kneaded with a single-screw or twin-screw extruder, roll, Banbury mixer, kneader, Brabender or the like.

The adhesive polymer composition of the present invention can be obtained by a method known in the art, including a method of successively extruding a laminate, a sandwich extrusion laminate, a coextrusion laminate, with or without an anchor coat agent on a substrate, And, the substrate and the adhesive polymer composition, and, and a laminate by a method such as co-extrusion of a different resin or the same type of resin, or further, vacuum forming, subjected to thermoforming such as pressure forming, or It is co-extrusion blow-molded and shaped into a container, which is suitable for producing a laminate by co-extrusion.

Specific examples of the laminated material such as the base material include polyamide resin, polyester resin, saponified ethylene-vinyl acetate copolymer, polyolefin resin, polycarbonate resin, polystyrene resin, and acrylic resin. Unstretched or stretched film or sheet such as resin,
Alternatively, a resin film having a thickness of about 5 to 2000 μm, such as a printed film or sheet having a printed surface or the like, a metal foil such as aluminum, copper, iron, or the like having a thickness of 3 to 10 may be used.
For example, those made of metal having a size of about 00 μm are exemplified.

As described above, the adhesive polymer composition of the present invention is excellent not only in the initial adhesive strength to the above-mentioned various substrates but also in its heat resistance.
Even when the contents are filled at a high temperature of about 5 ° C., boil sterilization at about 80 to 90 ° C., or at the time of high temperature treatment such as retort treatment at about 120 to 140 ° C., the delamination does not occur.

[0029]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist of the invention. In addition, (A) an ethylene-based polymer of the adhesive polymer composition, (B) a tackifier,
As the (C) aromatic vinyl compound-conjugated diene compound block copolymer or a hydrogenated product thereof, and (D) an unsaturated carboxylic acid or a derivative thereof-modified ethylene polymer, those shown below were used.

(A) Ethylene polymer dynamic viscosity (η ^* ): 520 Pa · sec, density: 0.91
An ethylene homopolymer obtained by a high-pressure method at 9 g / cm ³ and a melt flow rate of 2.0 g / 10 minutes. Dynamic viscosity (η ^* ): 480 Pa · sec, density: 0.90
An ethylene-1-octene copolymer with a metallocene catalyst having a melt flow rate of 2 g / cm ³ and a melt flow rate of 7.5 g / 10 min. Dynamic viscosity (η ^* ) 720 Pa · sec, density 0.87
An ethylene-1-octene copolymer with a metallocene catalyst having a melt flow rate of 0 g / cm ³ and a melt flow rate of 5.5 g / 10 min.

Dynamic viscosity (η ^* ) 850 Pa · sec,
Density 0.910 g / cm ³ , melt flow rate 3.5
g / 10 minutes of ethylene-1- with a metallocene catalyst
Octene copolymer. Dynamic viscosity (η ^* ) 1040 Pa · sec, density 0.9
An ethylene-1-octene copolymer with a metallocene catalyst having a melt flow rate of 3.0 g / 10 minutes at a melt flow rate of 02 g / cm ³ .

Dynamic viscosity (η ^* ) 1710 Pa · se
c, an ethylene-1-octene copolymer with a density of 0.902 g / cm ³ and a melt flow rate of 1.0 g / 10 min using a metallocene-based catalyst. Dynamic viscosity (η ^* ) 1970 Pa · sec, density 0.9
An ethylene-1-hexene copolymer with a metallocene catalyst having a melt flow rate of 00 g / cm ³ and a melt flow rate of 2.2 g / 10 min. Dynamic viscosity (η ^* ) 2020 Pa · sec, density 0.8
An ethylene-1-octene copolymer with a metallocene catalyst having a melt flow rate of 58 g / cm ³ and a melt flow rate of 1.0 g / 10 min.

Incidentally, the melt flow rate and the dynamic viscosity (η ^* ) of the ethylene polymer as the component (A) in the present invention.
Was measured by the following method. Melt flow rate According to JIS K7210, temperature 190 ° C, load 2.
Measured at 16 kg.

Using a dynamic viscosity (η ^* ) dynamic viscoelasticity measuring device (“Mechanical Spectrometer RSM800” manufactured by Rheometrics Co.), 200
A cylindrical sample having a diameter of 25 mm and a thickness of 10 mm press-formed at a temperature of 190 ° C. was sandwiched between two disks.
At an angular velocity of 100 rad / sec, a gap of 1.5 mm,
The load amplitude and the deflection amplitude, and the phase angle δ between the load and the deflection are read from the load and the deflection curve obtained by recording the sinusoidal vibration applied at a strain of 10% by the non-resonance method, and the elastic modulus G and the deflection amplitude are calculated. And the complex shear modulus G ^* = G ′ + iG ″ [where G ^*
Is the complex shear modulus, G ′ is the storage shear modulus, G ″ is the loss shear modulus, and i is the square root of −1. ] Is defined as G ″ = G × sin δ.
The dynamic viscosity (η ^* = G ″ / ω) was determined as the value obtained by dividing the loss shear modulus (G ″) by the angular velocity (ω).

(B) Tackifier A hydrogenated aromatic petroleum resin (softening temperature 115 ° C.,
Specific gravity 0.998, number average molecular weight 710). Hydrogenated aromatic petroleum resin (softening temperature 140 ° C,
Specific gravity 0.999, number average molecular weight 860).

(C) Aromatic vinyl compound-conjugated diene formation
Compound block copolymer or hydrogenated product thereof Hydrogenated product of styrene-butadiene block copolymer (styrene content 20% by weight, number average molecular weight 7000
0, melt flow rate at a temperature of 200 ° C., a load of 5 kg, a melt flow rate of 0.3 g / 10 min, and a hydrogenation rate of 98% or more). Hydrogenated styrene-butadiene block copolymer (styrene content 40% by weight, number average molecular weight 5000
0, melt flow rate at a temperature of 200 ° C., a load of 5 kg, a melt flow rate of 0.7 g / 10 min, and a hydrogenation rate of 98% or more).

Hydrogenated styrene-butadiene block copolymer (styrene content 29% by weight, number average molecular weight 70,000, melt flow rate 10 g / 10 min at 200 ° C., 5 kg load, hydrogenation rate 98% or more) . Hydrogenated styrene-butadiene / isoprene block copolymer (styrene content 30% by weight, number average molecular weight 83,000, hydrogenation rate 98% or more). A hydrogenated styrene-butadiene block copolymer modified with maleic anhydride (styrene content 28% by weight, melt flow rate 22 g / 10 minutes at a temperature of 200 ° C. under a load of 5 kg, hydrogenation rate 98% or more, maleic anhydride Acid unit content 2% by weight).

(D) Unsaturated carboxylic acid or derivative thereof
Water- soluble ethylene polymer Maleic anhydride unit content 0.7% by weight, melt flow rate 0.3g / 10 minutes, density 0.923g / cm ³
Maleic anhydride-modified ethylene-1-butene copolymer.

Examples 1 to 8, Comparative Examples 1 to 3 (A) Ethylene polymer, (B) tackifier, (C)
As an aromatic vinyl compound-conjugated diene compound block copolymer or a hydrogenated product thereof, and (D) an unsaturated carboxylic acid or a derivative thereof-modified ethylene-based polymer, Table 1 was used.
After uniformly mixing with a Henschel mixer, the mixture is fed to a single-screw extruder having a diameter of 65 mm, melt-kneaded at 190 ° C., extruded into strands, and cut to obtain a pellet-shaped adhesive polymer composition. Was manufactured.

Each of the obtained adhesive polymer compositions was melt-kneaded by a single screw extruder having a diameter of 40 mm for an intermediate layer and a polycarbonate resin ("Iupilon E-20" manufactured by Mitsubishi Engineering-Plastics Corporation) for an inner and outer layer.
00)) were melt-kneaded in a single screw extruder having a diameter of 40 mm, were integrally laminated by a feed block set at 275 ° C., and were co-extruded from an annular die also set at 275 ° C., and a molding speed of 5 m / min. By inflation molding, the polycarbonate resin outer layer 100μ
m / 100 μm of the adhesive polymer composition layer / 100 μm of the inner layer of the polycarbonate resin, to prepare a laminate having a two-layer structure of three layers.

With respect to the obtained laminate, the adhesive strength was evaluated by the following method, and the results are shown in Table 1. Using a strip-shaped sample cut out to a width of 10 mm from the laminate obtained from the initial adhesion , the polycarbonate resin outer layer at one end and the adhesive polymer composition layer were previously peeled off at 23 ° C. in accordance with JIS K 6854. At a peeling speed of 50 mm /
The T-shaped peel test was performed in minutes, and the peel strength was measured.

Heat Resistance of Adhesive Strength Using a strip sample cut out to a width of 10 mm from the obtained laminate, the same as described above under 100 ° C. atmosphere, 120 ° C. atmosphere and 140 ° C. atmosphere, respectively. A T-peel test was performed by the method and the peel strength was measured. In this case, if the peel strength of 100 g / 10 mm or more is maintained at each temperature, it can be determined that the film is practical.

Examples 9 to 10 and Comparative Examples 4 to 5 In the same manner as in Examples 1 to 8, pellets of the adhesive polymer composition having the composition shown in Table 1 were produced, and the obtained adhesive polymer composition was obtained. Is kneaded with a 45 mm-diameter single screw extruder for the intermediate layer, and saponified ethylene-vinyl acetate copolymer ("EVAL EP-F101" manufactured by Kuraray Co., Ltd.) for the outer layer.
A ") with a 45 m diameter single screw extruder, and an ethylene-1-hexene copolymer (" Novatech SF240 "manufactured by Nippon Polychem Co., Ltd.) for the inner layer with a 65 mm diameter single screw extruder, respectively. An outer layer of a saponified ethylene-vinyl acetate copolymer is formed by laminating and integrating with a feed block set at 210 ° C., co-extrusion from an annular die also set at 210 ° C., and inflation forming at a forming speed of 5 m / min. A laminate having a three-layer structure of 110 μm / adhesive polymer composition layer 60 μm / ethylene-1-hexene copolymer inner layer 230 μm was produced.

With respect to the obtained laminate, the adhesive force between the outer layer of the saponified ethylene-vinyl acetate copolymer and the adhesive polymer composition layer was evaluated in the same manner as described above, and the results are shown in Table 1. Was. The heat resistance of the adhesive strength was measured by measuring the peel strength in an atmosphere at 80 ° C. In this case, 250g / 10m
If a peel strength of at least m is maintained, it can be determined that the film is practically usable.

[0045]

[Table 1]

[0046]

According to the present invention, it is possible to provide an adhesive polymer composition which is excellent in molding processability, and is also excellent in initial adhesive strength to a substrate and heat resistance thereof.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hiroyuki Nakayama 1 Toho-cho, Yokkaichi-shi, Mie F-term in Yokkaichi office of Mitsubishi Chemical Corporation (reference) 4J002 AA012 BB02W BP01W GF00 GG00 4J040 DA041 DA162 DM012 KA26 LA04 LA08

Claims (4)

[Claims] (1) It contains the following components (A) and (B):
An adhesive polymer composition comprising: (A) At a temperature of 190 ° C. and an angular velocity of 100 rad / sec.
Dynamic viscosity due to shear deformation (η^*) Is 800 Pa · sec
As described above, the density is 0.850 to 0.950 g / cm. ^Three, Mel
Ethylene with a flow rate of 0.01 to 50 g / 10 min
-Based polymer: 50 to 99% by weight (B) tackifier: 50 to 1% by weight 2. The ethylene polymer as the component (A) comprises ethylene and an α-olefin having 6 to 12 carbon atoms,
Ethylene-α having a density of 0.850 to 0.915 g / cm ³ and a melt flow rate of 0.01 to 5.0 g / 10 min.
The adhesive polymer composition according to claim 1, wherein the composition comprises an olefin copolymer as a main component. 3. The adhesive polymer composition according to claim 1, further comprising the following component (C). (C) Aromatic vinyl compound-conjugated diene compound block copolymer or hydrogenated product thereof: 5 to 100 parts by weight based on 100 parts by weight of the total of components (A) and (B) 4. The adhesive polymer composition according to claim 1, further comprising the following component (D). (D) Unsaturated carboxylic acid or a derivative thereof modified ethylene polymer: 5 to 100 parts by weight based on 100 parts by weight of the total of components (A) and (B)