JP3229945B2 - Acid-modified polyolefin resin composition and adhesive film or sheet obtained using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acid-modified polyolefin resin composition having good adhesion to various substrates, especially to polyolefins and polyamides, and to an adhesive having excellent transparency obtained by molding the composition. It relates to a functional film or sheet.

[0002]

2. Description of the Related Art Generally, polyolefins have mechanical properties,
Because of its excellent transparency, moldability, hygiene, etc., it is used in a wide range of fields. However, considering use as a laminate, polyolefin is non-polar and therefore has poor adhesion to polar substances, and various modifications have been made to improve this. For example, attempts have been made to blend a polar substance or to carry out a graft reaction with a polar monomer, but the adhesion is not yet sufficient. Therefore, in order to further improve the adhesiveness, for example, a rubber material such as an ethylene-propylene copolymer or the like is added to a modified polyolefin resin grafted with an unsaturated carboxylic acid or a derivative thereof (hereinafter, also simply referred to as “acid-modified polyolefin resin”). A method using an acid-modified polyolefin resin composition mixed with low density polyethylene or the like has been proposed (Japanese Patent Publication No. 54-401).
12, No. 54-40113).

[0003]

However, the acid-modified polyolefin resin composition produced as described above has an effect of improving the adhesion to some extent, but the effect is not yet sufficient, and improvement is desired. I was We have:
In order to improve the adhesiveness of the acid-modified polyolefin resin and provide a composition with good transparency when formed into a film or sheet, we focused on formulating a polyamide resin from among various additives. did.

[0004] Conventionally, attempts have been made to improve the adhesion by adding a polyamide resin to an acid-modified polyolefin resin. For example, Japanese Patent Publication No. 58-24271 describes that a hollow container such as a gasoline container is formed from a laminate comprising a polyolefin layer, an adhesive layer, and a polyamide layer. It has been proposed to use a composition containing a polyamide resin for improving the adhesion. Also,
JP-B-58-43426 discloses a hot-melt adhesive composition in which a polyamide resin is blended with a polyolefin resin containing an acid-modified polyolefin to improve the adhesiveness.

However, according to the study of the present inventors, although the adhesiveness of a composition obtained by melt-mixing a polyamide resin with an acid-modified polyolefin resin is improved, it cannot be said that the composition is still sufficient. It was found that the transparency when formed into a sheet was insufficient.

[0006]

Generally, melt mixing of a resin such as polyolefin has a specific energy of 0.3 to 0.6.
It is performed under the condition of about kw · hr / kg. The present inventors have studied various melt mixing conditions in order to improve transparency, and found that the specific energy is 0.7 kW · hr /
When the acid-modified polyolefin resin and the polyamide resin are melt-mixed under the condition of not less than kg, the polyamide resin is micro-sized and uniformly dispersed in the acid-modified polyolefin resin, and the transparency is remarkably improved, and the adhesiveness is further improved. This led to the completion of the present invention.

The gist of the present invention is that an acid-modified polyolefin resin and a polyamide resin have a specific energy of 0.7 kW.
An acid-modified polyolefin resin composition obtained by melt-mixing under conditions of at least hr / kg and an adhesive film or sheet obtained by molding the composition. Hereinafter, the present invention will be described.

[0008] The acid-modified polyolefin resin in the composition of the present invention may be made of polypropylene and / or
Alternatively, it can be obtained by a graft reaction of an unsaturated carboxylic acid or a derivative thereof to polyethylene or the like. For example, a method of reacting a polyolefin with an unsaturated carboxylic acid in a molten state (for example, Japanese Patent Publication No. 43-27421)
No.), a method of reacting in a solution state (for example,
15422), a method of reacting in a slurry state (for example, JP-B-43-18144), and a method of reacting in a gas-phase state (for example, JP-A-50-77493).
Among these methods, the melt kneading method using an extruder is preferably used because of its simple operation.

As a raw material of the acid-modified polyolefin resin, for example, homopolymers and copolymers of polypropylene and polyethylene are used. Examples of the copolymer include a random or block copolymer of propylene and 1 to 5% by weight of ethylene, a random or block copolymer of ethylene and 1 to 10% by weight of propylene, or a copolymer of propylene or ethylene and 1 to 10% by weight. Α of C ₄ or more
-Copolymers with olefins, mixtures thereof and the like are used. Among them, the melt flow index (hereinafter, simply abbreviated as MFI) is particularly 0.5 to 30 g /.
Homopolypropylene and propylene-ethylene random copolymer for 10 minutes, especially 5 to 15 g / 10 minutes, and polyethylene and ethylene-α-olefin copolymer having an MFI of 0.3 to 30 g / 10 minutes are preferably used.

[0010] The MFI referred to here is ASTM-D12.
It is a value measured at 230 ° C. for polypropylene and 190 ° C. for polyethylene based on standard 38. Also,
Examples of the unsaturated carboxylic acids include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, and acid anhydrides, esters, amides, imides, metal salts and the like. Most preferably, an acid is used.

An organic peroxide is used to promote the reaction between the polyolefin and the unsaturated carboxylic acids.
Examples of the organic peroxide include benzoyl peroxide, lauroyl peroxide, azobisisobutyronitrile, dicumyl peroxide, α, α′-bis (t-butylperoxydiisopropyl) benzene,
2,5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne-3, di-t-butylperoxide, Cumene hydroperoxide, t-butyl hydroperoxide and the like. The amount of the organic peroxide to be added is not particularly limited, but is usually 0.005 to 5 parts by weight, preferably 0.01 to 1 part by weight, per 100 parts by weight of the polyolefin.

The acid-modified polyolefin resin grafted with unsaturated carboxylic acids is the above-mentioned polyolefin,
The unsaturated carboxylic acid and the organic peroxide are sufficiently mixed by a tumbler, a Henschel mixer, or the like, and the mixture is melt-kneaded at a temperature higher than the melting point of the polyolefin, generally higher than the melting point and lower than 280 ° C. to perform the grafting reaction. The method of melt-kneading is not particularly limited, and can be performed using, for example, a screw extruder, a Banbury mixer, a mixing roll, or the like. However, a screw extruder is preferably used for simplicity of operation. The temperature and time of the melt-kneading vary depending on the decomposition temperature of the organic peroxide used.
To 280 ° C. for 0.3 to 30 minutes, preferably 170
1 to 10 minutes at ~ 250 ° C is appropriate.

In the present invention, the acid-modified polyolefin resin is at least 2% by weight, preferably 5 to 50%.
It is preferred to contain, by weight, particularly preferably 10 to 25% by weight of an acid-modified polyolefin elastomer. As a raw material of the acid-modified polyolefin elastomer, for example, a copolymer elastomer of ethylene and an α-olefin having 3 or more carbon atoms is used. Above all, the density is 0.91
g / cm ³ , preferably 0.85 to 0.90 g / c
in m ^3, MFI is 0.1~50g / 10 minutes (ASTM-
D1238, 190 ° C), preferably 1 to 20 g / 1
A time of 0 minutes is preferred.

Α having 3 or more carbon atoms to be copolymerized with ethylene
Examples of the olefin include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, and the like, together with non-conjugated dienes such as 1,4-hexadiene, dicyclopentadiene, and ethylidene norbornene. Can also be used. The ethylene-α-olefin copolymer elastomer is obtained by copolymerizing ethylene and α-olefin with a Ziegler-type catalyst, in particular, a catalyst composed of a vanadium compound such as vanadium oxytrichloride and vanadium tetrachloride and an organoaluminum compound. It is desirable that the ethylene content in the elastomer is in the range of 40 to 90 mol% and the α-olefin content is in the range of 10 to 60 mol%. Commercially available ethylene-α-olefin copolymer elastomers include, for example, CdF Chimie
E. FIG. P. NORSOFLEX (FW1600, F
W1900, MW1920, SMW2440, LW22
20, LW2500, LW2550); Flex resin (DFDA1137, DFDA11) of Nippon Unicar
38, DEFD1210, DEFD9042), Tuffmer (A4085, A4090, P01) of Mitsui Petrochemical Co., Ltd.
80, P0480), JSR-EP of Japan Synthetic Rubber Co., Ltd.
(EP02P, EP07P, EP57P) and the like.

The acid modification of these elastomers can be carried out in the same manner as the above-mentioned acid modification of the polyolefin resin.
In the present invention, an unmodified polyolefin resin and an elastomer may be kneaded and simultaneously subjected to an acid modification treatment. The amount of the unsaturated carboxylic acid grafted in the acid-modified polyolefin resin (including the acid-modified polyolefin elastomer when used) is 0.01 to 3% by weight, preferably 0.03 to 1% by weight. When the amount of the unsaturated carboxylic acid grafted is 0.01% by weight or less, the adhesiveness is lowered, and when the amount is 3% by weight or more, the gelation tends to increase, which is not preferable.

In the present invention, the acid-modified polyolefin resin may be used after being diluted with up to about 2000 parts by weight of an unmodified polyolefin resin per 100 parts by weight of the acid-modified polyolefin resin. At this time, it is preferable that the mixture is diluted and mixed so that the graft amount of the unsaturated carboxylic acids in the diluted mixture falls within the above range. As such an unmodified polyolefin resin, polypropylene or polyethylene, which is a raw material of the above-mentioned acid-modified polyolefin resin, is suitably used.

As the polyamide resin to be mixed with the acid-modified polyolefin resin, one having a relative viscosity of about 1 to 6 is usually used. For example, hexamethylene diamine, decamethylene diamine, dodecamethylene diamine,
Trimethylhexamethylenediamine, 1,3- or 1,4-bis (aminomethyl) cyclohexane, bis (p-aminocyclohexylmethane), m- or p-
Of aliphatic, alicyclic and aromatic diamines such as xylylenediamine with aliphatic, alicyclic and aromatic dicarboxylic acids such as adipic acid, suberic acid, sebacic acid, cyclohexanedicarboxylic acid, terephthalic acid and isophthalic acid Polyamide obtained by polycondensation, ε-aminocaproic acid, 11-
Examples thereof include polyamides obtained by condensation of aminocarboxylic acids such as aminoundecanoic acid, polyamides obtained from lactams such as ε-caprolactam and ε-laurolactam, and copolymerized polyamides thereof. In particular,
Nylon-6, Nylon-66, Nylon-610, Nylon-9, Nylon-11, Nylon-12, Nylon-6 / 66, Nylon-66 / 610, Nylon-6
/ 11 and the like.

From the viewpoint of moldability, the melting point is 170-28.
A temperature of 0 ° C, preferably 200 to 240 ° C is suitable. In the present invention, nylon-6 and nylon-66 are particularly preferred. The mixing of the acid-modified polyolefin resin and the polyamide resin results in a specific energy of 0.1 relative to the resin.
7 kw · hr / kg or more, preferably 1.0 to 2.0
kw · hr / kg, particularly preferably 1.0 to 1.5 k
Melt and mix under the condition of w · hr / kg.

Here, the specific energy means the energy given to the resin per unit weight (1 kg) from the kneading equipment for the effect of kneading when the resin is melted and kneaded. Will be higher. For example, in the case of an extruder, it is approximately expressed by the power consumption of a screw driving motor required to extrude 1 kg of resin.

In the case of a roll-type kneader such as a Banbury mixer, the power consumption is approximately represented by the power consumption of a roll drive motor required to treat 1 kg of resin. Specifically, an ammeter, a voltmeter, etc. are attached to the motor of the extruder, and the power consumption of the motor is obtained from this, multiplied by the power factor of the motor (usually about 0.85), and added to 1 kg of resin. A kneading force (kw · hr / kg) is obtained.

In practice, the acid-modified polyolefin resin and the polyamide resin are melt-mixed at 200 to 350 ° C. using a screw extruder, a Banbury mixer, a mixing roll, or the like. Means for adjusting the specific energy to 0.7 kW · hr / kg or more vary depending on the conditions of equipment such as a screw extruder used for melt mixing, a roll-type kneader such as a Banbury mixer and a mixing roll, and mixing conditions. Generally, kneading is performed in a strong direction. For example, when using a screw extruder, the screw compression ratio and L
/ D is increased, the screw is (forced) cooled, the temperature setting of the cylinder is adjusted, the mixing part is adjusted, and the diameter of the orifice installed at the tip of the cylinder is reduced. When a Banbury mixer or a mixing roll is used, the gap between the rolls is narrowed, the rotation of the roll is set high, the roll is (forced) cooled, and the mixing time is lengthened. For example, when using a single screw extruder with a screw diameter D of 40 to 50 mm class, an orifice is set at the tip of the extruder cylinder, and the L / D of the screw (L is the screw length, D is the screw diameter) Is set to about 25 to 35, the orifice diameter is about 2 to 15 mm, and the melting temperature is 2
The specific energy can be achieved by setting the residence time at 20 to 250 ° C. and about 3 to 5 minutes. When a Banbury mixer is used, a convenient method is to adjust the kneading time appropriately until a predetermined specific energy is achieved while constantly observing the power consumed by the kneading rolls. For example, an acid-modified polyolefin resin and a polyamide resin (10 kg) are charged into a Banbury mixer having a throughput of 100 kg / hr class, and a kneading temperature of 220 to 250 ° C.
When the rotation speed ratio of the two rotors is 1.2 to 1.4 and the low rotation speed side rotor is 70 to 150 rpm, 4 to
The above specific energy can be achieved by kneading for about 7 minutes. Polyamide resin is 2 to 2 in the obtained resin composition.
It is mixed so as to be 30% by weight, preferably 10 to 25% by weight. Outside these ranges, the effect of improving the adhesiveness and transparency is reduced, so that it is not preferred.

[0022] The acid-modified polyolefin composition of the present invention contains a heat-resistant stabilizer, a weather-resistant stabilizer, a lubricant, an antistatic agent, a nucleating agent, a filler, a pigment, a dye, a flame retardant, which are generally used.
An additive such as an anti-blocking agent may be contained in an amount of about 0.0005 to 30% by weight. By molding the thus obtained acid-modified polyolefin resin composition of the present invention according to a conventional method, a film or sheet having good adhesiveness and excellent transparency can be obtained. For example, using a molding machine such as a T-die or an inflation, the extrusion temperature 2
By extruding under the conditions of 00 to 350 ° C and a die temperature of 200 to 350 ° C, a film or sheet having a desired thickness can be obtained.

With respect to the transparency of the film thus obtained, a film having a transparency of 50% or more and an adhesive strength of 400 g / 15 mm width or more (when the film thickness is 30 to 100 μm) is obtained. Further, the transparency and mechanical strength can be improved by stretching the film or sheet obtained above.

The acid-modified polyolefin resin composition of the present invention can be used, for example, as an adhesive layer of various laminates formed using a base layer of polyolefin, ethylene-vinyl acetate copolymer ken compound, polyamide, polyester, glass, metal or the like. Can be suitably used. Examples of the polyolefin forming the base layer include low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, polybutene-1, and copolymers and compositions thereof. The saponified ethylene-vinyl acetate copolymer has an ethylene content of 20 to 60 mol%, preferably 25 to 25 mol% in view of gas barrier properties, oil resistance, water permeability and the like.
Those having 50 mol% and a saponification degree of 93% or more, preferably 96% or more are mentioned.

The polyamide is a linear polymer having an acid amide bond obtained by (a) condensation of a diamine and a dicarboxylic acid, (b) condensation of an amino acid, and (c) ring opening of a lactam. , Nylon 6
6, nylon 6,10, nylon 11, nylon 12, and the like can be used. Further, the polyester is obtained by condensation of a saturated dibasic acid and glycols, specifically, polyethylene terephthalate obtained from ethyne glycol and terephthalic acid,
A polyethylene terephthalate copolymer having a saturated dibasic acid such as phthalic acid, isophthalic acid, sebacic acid, adipic acid, azelaic acid, glutamic acid, succinic acid, and oxalic acid as a copolymer component, and 1,4-cyclohexanediene as a diol component A polyethylene terephthalate copolymer containing methanol, diethylene glycol, propylene glycol or the like as a copolymer component, or a mixed composition thereof is used.

Specifically, examples of preferred laminates include:
For example, a laminated film formed by using the acid-modified polypropylene resin composition of the present invention as the adhesive layer between the polypropylene layer and the polyamide layer may be mentioned. Such a laminated film can be produced by an ordinary method of forming a laminate, such as a multilayer inflation method, a multilayer T-die method, a multilayer blow molding method, or an extrusion laminate molding method.

The resulting laminated film has good adhesiveness and excellent transparency, and can be suitably used as a packaging material for foods and the like.

[0028]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the examples unless it exceeds the gist. Example 1 Melt flow index (MFI) is 0.7 g / 10
Propylene-ethylene random copolymer having an ethylene content of 2.5% by weight, and 100 parts by weight of maleic anhydride.
50 parts by weight using 0.15 part by weight of 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne-3
The mixture was melt-kneaded at 210 ° C. in an mφ extruder and pelletized to obtain an acid-modified polypropylene resin. The maleic anhydride graft amount of this acid-modified polypropylene resin is 0.3
It was 5% by weight.

Using 80 parts by weight of the acid-modified polypropylene resin and 20 parts by weight of a nylon-6 / 6.6 copolymer (manufactured by Mitsubishi Kasei Corporation, trade name: Novamid 2030; Novamid is a registered trademark), monoaxial extrusion The mixture was melt-kneaded under conditions such that the specific energy to the resin was 1.0 kW · hr / kg or more and the melting temperature was 230 ° C., and pelletized to obtain an acid-modified polyolefin resin composition. The extruder has a screw diameter of 50 mm, screw L / D of 32,
The molding conditions were such that the orifice diameter was set to 5 mm.

Using the obtained acid-modified polyolefin resin composition as an adhesive layer, a laminated film was produced. That is, three layers T
The above-mentioned nylon-6 / 6.6 copolymer was extruded at an extrusion temperature of 230 ° C. with a die molding machine, and a propylene-ethylene random copolymer (manufactured by Mitsubishi Kasei Co., Ltd., Mitsubishi Polypro 6
500J MFI: 9 g / 10 min, density 0.90 g / c
m ³ ) was extruded at an extrusion temperature of 210 ° C., the acid-modified polyolefin resin composition was extruded at an extrusion temperature of 210 ° C., and the three-layer die was molded at a temperature of 230 ° C. to form a nylon layer / adhesive layer / polypropylene layer (30 μ / 10 μ / 30 μ) of a laminated film was obtained. Table 1 shows the adhesive strength (180 ° peel strength at a width of 15 mm) and transparency (transparency) of the obtained laminated film. About transparency
The value was measured using a "transparency measuring device" manufactured by Murakami Color Research Laboratory, and displayed as a MAX value.

Example 2 An acid-modified polyolefin resin composition was prepared in the same manner as in Example 1 except that the amount of the nylon-6 / 6.6 copolymer was changed. Thus, a laminated film was obtained. The film properties of the obtained laminated film were measured and are shown in Table 1.

Example 3 Instead of the nylon-6 / 6/6 copolymer used in Example 1, a nylon-6 copolymer (manufactured by Mitsubishi Kasei Corporation, trade name Novamid 1020) was used, and the specific energy was 1 .2
An acid-modified polyolefin resin composition was manufactured at kW · hr / kg, and then a laminated film was obtained in the same manner as in Example 1. The physical properties of the laminated film were measured and are shown in Table 1. In producing the acid-modified polyolefin resin composition, molding conditions were set such that the screw diameter of the extruder was set to 50 mm, the L / D of the screw was set to 32, and the orifice diameter was set to 3 mm.

Example 4 An acid-modified polyolefin resin composition was produced in the same manner as in Example 3 except that the amount of the nylon-6 polymer was changed. Then, a laminated film was produced in the same manner as in Example 3. Obtained. The physical properties of the laminated film were measured and are shown in Table 1.

Comparative Example 1 A laminated film was obtained in the same manner as in Example 1, except that the specific energy for producing the acid-modified polyolefin resin composition was changed to 0.3 kW · hr / kg. The physical properties of the laminated film were measured and are shown in Table 1. In producing the acid-modified polyolefin resin composition, molding conditions were set such that the screw diameter of the extruder was set to 50 mm, the L / D of the screw was set to 32, and the orifice diameter was set to 20 mm.

[0035]

[Table 1]

Example 5 Mitsubishi Polypro 6500J (manufactured by Mitsubishi Kasei Corporation, MFI =
80 g of 9 g / 10 min (measured at 230 ° C., propylene-ethylene random copolymer) and 80 parts by weight of Toughmer A2009
0 (MFI = 18 g / 10, manufactured by Mitsui Petrochemical Industries, Ltd.)
(Measured at 190 ° C.), 20 parts by weight of ethylene-butene random copolymer elastomer) and 1.5 parts of maleic anhydride.
50 parts by weight using 0.15 parts by weight of 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne-3
The mixture was melt-kneaded at 210 ° C. in an mφ extruder and pelletized to obtain an elastomer-containing acid-modified polyolefin resin. The grafted amount of maleic anhydride in this elastomer-containing acid-modified polypropylene resin was 1.2% by weight.

20 parts by weight of the elastomer-containing acid-modified polyolefin resin obtained as described above, 60 parts by weight of Mitsubishi Polypro 6500J, and nylon-6 polymer (manufactured by Mitsubishi Chemical Corporation, Novamid 1020; Novamid is a registered trademark) ) 20 parts by weight of a resin having a specific energy of 1.0 kW · hr / kg with a single screw extruder at a melting temperature of 250
The resulting mixture was melt-mixed under a condition of a temperature of ℃ and pelletized to obtain an acid-modified polyolefin resin composition. The molding conditions of the extruder were such that the screw diameter was 50 mm, the screw L / D was 32, and the orifice diameter was 5 mm.

A laminated film was produced using the above acid-modified polyolefin resin composition as an adhesive layer. That is, the Novamid 1020 is molded by a three-layer T-die molding machine under the conditions of an extrusion temperature of 250 ° C., Mitsubishi Polypro 6500J at 230 ° C., an acid-modified polyolefin resin composition at 240 ° C., and a die temperature of 250 ° C. Layer / polypropylene layer (3
0 μ / 10 μ / 30 μ). Table 1 shows the adhesive strength and transparency (transparency) of the obtained laminated film.
2 is shown.

Example 6 An acid-modified polyolefin resin composition was prepared in the same manner as in Example 5 except that the amount of the nylon-6 polymer was changed. Then, a laminated film was obtained in the same manner as in Example 5. Was. The results are shown in Table-2.

EXAMPLE 7 Nylon-6 was used instead of the nylon-6 polymer of Example 5.
/ 66 copolymer (manufactured by Mitsubishi Kasei Corporation, trade name Novamid 2030) in the same amount and a specific energy of 1.2 kW ·
An acid-modified polyolefin resin composition was produced at a rate of hr / kg, and then a laminated film was obtained in the same manner as in Example 5. The results are shown in Table-2. In producing the acid-modified polyolefin resin composition, molding conditions were set such that the screw diameter of the extruder was set to 50 mm, the L / D of the screw was set to 32, and the orifice diameter was set to 3 mm.

Examples 8 and 9 In Example 5, an ethylene-propylene copolymer elastomer (Nippon Synthetic Rubber Co., Ltd.) was used as an elastomer.
), EP02P, MFI = 3.2 g / 10 min).
An acid-modified polyolefin resin composition was produced in the same manner as in Example 2, except that the amount shown in Example 2 was used, and then a laminated film was obtained in the same manner as in Example 5. The results are shown in Table-2.

Comparative Example 2 A laminated film was obtained in the same manner as in Example 5, except that the specific energy for producing the acid-modified polyolefin resin composition in Example 5 was changed to 0.3 kw · hr / kg. The results are shown in Table-2. When producing the acid-modified polyolefin resin composition, the screw diameter of the extruder 50mm,
The molding conditions were such that the L / D of the screw was set to 32 and the orifice diameter was set to 20 mm.

[0043]

[Table 2]

[0044]

According to the present invention, by melt-mixing an acid-modified polyolefin resin and a polyamide resin under specific conditions, the polyamide resin is micro-sized and uniformly dispersed in the acid-modified polyolefin resin and has good adhesiveness. And a suitable composition can be obtained. Further, the film or sheet obtained by molding the composition has excellent transparency and can be advantageously used as an adhesive layer of various laminates such as packaging materials.

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI // B29K 23:00 B29K 23:00 B29L 9:00 B29L 9:00 (56) References JP-A-1-294748 (JP, A) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) C08L 23/26 C08L 77/00 B29B 7/12 B29C 47/38 B32B 27/32

Claims (3)

(57) [Claims] 1. An acid-modified polyolefin resin composition obtained by melt-mixing an acid-modified polyolefin resin and a polyamide resin under a condition that the specific energy is 0.7 kW · hr / kg or more. 2. An adhesive film obtained by melt-mixing an acid-modified polyolefin resin and a polyamide resin under conditions such that the specific energy is 0.7 kW · hr / kg or more, and molding. Sheet. 3. An acid-modified polyolefin resin comprising 2 to 5
The acid-modified polyolefin resin composition according to claim 1, wherein 0% by weight is an acid-modified polyolefin elastomer.