JP2001164216A - Adhesive resin composition and laminate using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive resin composition which has good adhesive strength or water-resistant adhesivity to substrates such as polyesters, polyamides or aluminum foils, and to provide a laminate using the same. SOLUTION: This adhesive resin composition which comprises a resin A comprising a polyolefin resin, a resin B comprising an ethylenic-α,-β-unsaturated carboxylic acid or its ion cross-linked product or esterification product, or a mixture of the resin A with the resin B, characterized by compounding a hydrophobic liquid fatty acid ester having at least one unsaturated bond in an amount of 0.01 to 5 pts.-wt. per 100 pts.wt. of the total amount of the resins A and B. The laminate is obtained by producing a compound from the adhesive resin composition and then coextruding the compound and a polyester or polyamide to form the adhesive resin layer 2 on the substrate 1 comprising the polyester or polyamide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive resin composition for extrusion lamination, which has good adhesion strength and water resistance to substrates such as polyester, polyamide and aluminum foil to be adhered, and uses the same. The laminate.

[0002]

2. Description of the Related Art Conventionally, when laminating various films composed of a polyolefin resin or an ethylene copolymer on a base material such as polyester, polyamide or aluminum foil, a two-part curable adhesive such as urethane is used. And lamination using a method such as extrusion lamination or dry lamination.

However, these two-part curable adhesives have good adhesion to various substrates and polyolefin resins or ethylene copolymers, but use a large amount of organic solvents such as toluene and ethyl acetate. Therefore, there is a problem of residual solvent remaining in the laminate, adverse effects on the human body, and deterioration of the working environment (odor, fire, etc.). In general, a two-part curable adhesive is generally prepared by blending a curing agent composed mainly of polyester polyol or acrylic polyol and a curing agent composed of various isocyanates. In the case of an adhesive which exhibits an adhesive mechanism by the above reaction, the coating process is relatively complicated in consideration of the open time or the pot life.

Under such a background, a processing method for extruding and laminating a polyolefin resin or an ethylene copolymer with various substrates without using various adhesives to improve the adhesiveness between the laminate layers has been proposed. Considerations are being made. One of the techniques is a processing method using various surface treatments. Generally, low-density polyethylene resin
When high-temperature processing exceeding 20 ° C. is performed, a functional group is generated due to oxidation of the resin, and it is possible to impart polarity. Therefore, if a polyester substrate or a polyamide substrate is subjected to a treatment such as a corona treatment, a flame treatment, or a plasma treatment, it becomes possible to obtain a good adhesive strength to these substrates. Further, even if a high temperature processing exceeding 320 ° C. is not performed, by extruding the resin in an atmosphere having a strong oxidizing property such as ozone, the same effect as the high temperature processing can be obtained even at a low temperature.

[0005] However, the adhesion behavior between the layers of the laminate obtained in this manner is mainly due to hydrogen bonding and the like.
This method utilizes a secondary bond, and there is a problem of a decrease in adhesive strength in a moisture absorbing state due to the nature of the bond. In addition, ozone treatment and the like have problems that ozone gas has problems of odor and corrosiveness, and that ozone gas itself cannot be visually confirmed, so that quality control of the treatment effect is difficult.

In order to overcome such problems, various ethylene copolymers or graft copolymers having various functional groups introduced into a polymer have been designed. Examples thereof include ethylene-α, β-unsaturated carboxylic acid or its esterified product, ion-crosslinked product, acid anhydride-modified polyolefin, epoxy-modified polyolefin, and the like.
Among these adhesive resins, some have good adhesiveness to aluminum foil substrates, so they are used for various packaging materials.However, when polyester or polyamide is used as the substrate, good adhesive strength is obtained. At present it has not been obtained.

As described above, while there is a tendency to improve the lamination method using an adhesive, there are few resins having good adhesion to a plurality of substrates without using an adhesive. Further, an adhesive resin composition having water resistance and a laminate thereof are desired.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has an adhesive resin composition having good adhesive strength or water-resistant adhesiveness to a substrate such as polyester, polyamide, or aluminum foil. And a laminate thereof.

[0009]

Means for Solving the Problems In order to achieve the above object in the present invention, first, in claim 1, a resin A comprising a polyolefin resin or ethylene-α,
It is composed of a single resin B or a mixture of the resin A and the resin B, which is composed of any one of the resin B consisting of a β-unsaturated carboxylic acid or an ionic cross-linked product or an esterified product thereof, and 100 parts by weight of the resin A + the resin B. An adhesive resin composition comprising 0.01 to 10 parts by weight of a hydrophobic liquid unsaturated fatty acid ester having at least one saturated bond.

According to a second aspect of the present invention, the liquid unsaturated fatty acid ester has a surface contact angle of 50 m.
The adhesive resin composition according to claim 1, wherein the angle is 25 ° or less with respect to the substrate having a thickness of N / m or more.

Further, in the third aspect, the thermal decomposition temperature of the liquid unsaturated fatty acid ester is 250 ° C. or more.
The adhesive resin composition according to claim 1 or 2, wherein the temperature is 30 ° C or lower.

Further, in the fourth aspect, the adhesive resin composition according to any one of the first to third aspects, wherein the liquid unsaturated fatty acid ester is a derivative of glycerol. It is.

[0013] Further, in claim 5, the liquid unsaturated fatty acid ester is triglyceride, and a part of the unsaturated bond site is polarized. An adhesive resin composition according to one of the above items.

Further, in the sixth aspect, the method of polarization is epoxidation.
6. The adhesive resin composition according to any one of claims 1 to 5.

Further, in claim 7, the adhesive resin composition according to any one of claims 1 to 6 is used to form an adhesive resin layer on a substrate such as polyester, polyamide, or aluminum foil. It is a laminate characterized by being formed.

Here, the surface treatment degree is a simple indication of the wet state of the surface of various substrates, and a predetermined amount of a wetting test solution prepared with distilled water and formamide is applied to the surface of various substrates. When it comes off, the value of the wet test liquid (・ mN /
m).

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. The basic composition of the adhesive resin composition of the present invention is a resin A composed of a polyolefin resin, or a resin B composed of an ethylene-α, β unsaturated carboxylic acid or an ionic crosslinked product or an esterified product thereof, or a resin. A, consisting of a mixture of resin A and resin B, wherein 100 parts by weight of resin A + resin B contains 0.01 parts of a hydrophobic liquid unsaturated fatty acid ester having at least one unsaturated bond.
~ 5 parts by weight.

As the resin A comprising a polyolefin resin, resins represented by low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-α-olefin copolymer, polypropylene of various structures, and the like are selected. Low-density polyethylene is preferred as a resin that is often used.

As the resin B which is an ethylene-α, β unsaturated carboxylic acid or its ionically crosslinked or esterified product, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl acrylate copolymer Coalescence, ethylene-ethyl acrylate copolymer, ethylene-
Binary copolymers such as glycidyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer, and ionomer, and ternary copolymers can be appropriately selected.

The mixing ratio of these resins is not particularly limited, and may be a single resin A, a single resin B, or a mixture thereof. It is appropriately selected according to the base material to be adhered. However, resin B is preferably a mixture of these resins because it has low crystallinity and an effect of sticking is expected.

The hydrophobic liquid unsaturated fatty acid ester having at least one unsaturated bond is generally an ester composed of a higher unsaturated fatty acid and various alcohols. Examples of higher unsaturated fatty acids include oleic acid, linoleic acid, and linolenic acid.

The contact angle of the above-mentioned unsaturated fatty acid ester with various substrates is determined by measuring the degree of surface treatment using a wetting test solution adjusted with distilled water and formamide to 50 mN / m.
As described above, it is preferable that the angle is not more than 25 ° on the treated surface of the polyester or polyamide base material having preferably 60 mN / m or more. Here, various methods such as corona, flame, plasma, electron beam, and ultraviolet treatment can be used as a surface treatment method for a polyester or polyamide base material.

As a method of measuring the contact angle, one drop of the above unsaturated fatty acid ester is dropped on various substrates, and the contact angle is measured 5 seconds after the drop. The measurement environment at that time is the contact angle at room temperature (25 ° C.) because the unsaturated fatty acid ester has a remarkable change in viscosity with temperature.

Further, the decomposition temperature of the unsaturated fatty acid ester is preferably from 250 ° C. to 330 ° C. This is because the unsaturated bond site is disintegrated by high-temperature processing, and a graft reaction with the polyolefin resin is formed based on the collapse.However, if it is decomposed at a too low temperature, the graft reaction with the polyolefin is not formed. This is because the unsaturated fatty acid ester is consumed and the adhesiveness cannot be obtained.

The unsaturated fatty acid ester preferably has two or more unsaturated bond sites in its structure. Therefore, unsaturated bonds of unsaturated fatty acids
In one case, it is possible to have three unsaturated bonds by esterification in the form of a triglyceride with glycerol. By using glyceride in this way, it becomes possible to increase the number of unsaturated binding sites. Such unsaturated fatty acid esters include linseed oil, soybean oil, corn oil,
Safflower oil, olive oil and the like can be mentioned.

The unsaturated bond contained in the unsaturated fatty acid ester has two main meanings. One is necessary for performing a graft reaction to the resin A or resin B serving as a base. The other is to provide a functional group for further improving the affinity when using a polyester or polyamide as a base material. There are various methods for functionalizing the unsaturated double bond by decomposition or addition reaction, but a relatively easy method is to add oxygen using peroxide or peracetic acid to epoxidize. Is preferred. Epoxidized products of such unsaturated fatty acid esters include epoxidized linseed oil, epoxidized soybean oil, epoxidized corn oil, epoxidized safflower oil, and epoxidized olive oil.

An adhesive resin composition can be obtained by blending the above-mentioned unsaturated fatty acid ester into resin A alone, resin B alone, or a mixture thereof.

The adhesion mechanism when the adhesive resin composition of the present invention is extrusion-laminated on a polyester or polyamide substrate is presumed as follows. By selecting an unsaturated fatty acid ester having a surface contact angle of 25 ° or less (very good wettability) with these substrates, it is possible to ensure adhesion to various substrates. This means that a tight interface is formed between the various base materials and the unsaturated fatty acid ester, and it is possible to impart mechanical connection, diffusion, and adsorption in the theory of adhesion to the adhesion interface. It is possible.

However, such unsaturated fatty acid esters have low affinity with polyolefin resins. As a result, even if the unsaturated fatty acid ester improves the affinity with the polyester or polyamide, the affinity with the polyolefin is low, and therefore, in a simple mixture of the polyolefin and the unsaturated fatty acid ester, the unsaturated fatty acid ester bleeds out. On the other hand, distribution at the bonding interface causes adhesion inhibition.

Therefore, by performing a graft reaction between the polyolefin resin and the unsaturated fatty acid ester by high-temperature processing at a temperature higher than 320 ° C., it is possible to form a grafter having an affinity for both the polyolefin resin and various base materials. By segregating the graftmer at the adhesive interface, the unsaturated fatty acid moiety of the graftmer improves affinity with various base materials, and the polyolefin moiety of the graftmer improves affinity with the base resin, thereby improving adhesiveness. It is supposed to be done.

Further, by making the fatty acid site of the unsaturated fatty acid ester a higher unsaturated fatty acid, a hydrophobic effect is exhibited, and the graftmer segregated at the bonding interface makes the bonding interface hydrophobic, thereby obtaining water-resistant adhesiveness. Becomes possible.

It is considered that by functionalizing a part of the unsaturated fatty acid such as epoxidation, it becomes possible to impart an attractive interaction effect in the above-mentioned adhesion theory, and it is further effective for adhesion. Can be

The method for producing the adhesive resin composition and the laminate of the present invention will be described. First, a compound is prepared by kneading a single substance or a blend of the resin A and the resin B and an unsaturated fatty acid ester with a kneader such as a twin-screw extruder or a Banbury mixer. At this time, it is preferable to process at a relatively low temperature in consideration of the kneading efficiency and the fact that the unsaturated fatty acid is not thermally decomposed at this time. Preferably 180 ° C to 280
C., more preferably in the range of 180 to 240.degree. When the amount of the unsaturated fatty acid ester is less than 0.01 part by weight, a predetermined adhesive strength cannot be obtained. When the amount is more than 10 parts by weight, the residue remaining without graft reaction bleeds and the adhesion is inhibited. Therefore, the addition amount is 0.01 to 10 parts by weight, preferably 0.1 to 10 parts by weight based on 100 parts by weight of resin A + resin B in total.
5 parts by weight.

The adhesive resin composition thus obtained is extrusion-laminated by high-temperature processing to prepare a graftmer immediately before lamination to various substrates. Although the processing temperature depends on the type of resin used as the base,
If the base resin is low-density polyethylene (LDPE), high-temperature processing at 320 ° C. or higher where an oxidation reaction occurs is preferable. However, when the resin B is a resin such as an ethylene-methacrylic acid copolymer (EMMA), thermal decomposition occurs, and when the resin B contains an epoxidized unsaturated fatty acid ester, a cross-linking reaction is caused to cause a film forming property. Therefore, it is preferable to set the compounding amount to a small amount.

The adhesive resin composition of the present invention has an adhesive property to an aluminum foil, but when it is desired to further strongly adhere to the aluminum foil, it is co-extruded with an ethylene-α, β unsaturated carboxylic acid copolymer. By forming the adhesive resin composition of the present invention on the base material side composed of polyester and polyamide and the ethylene-α, β unsaturated carboxylic acid copolymer on the aluminum foil side, a base composed of polyester and polyamide is obtained. The material and the aluminum foil can be laminated with strong adhesion. In this case, if the epoxidized unsaturated fatty acid ester is mixed with the adhesive resin composition of the present invention, the epoxy site and the carboxylic acid site react at the co-extrusion interface, thereby increasing the strength at the co-extrusion interface. Adhesiveness is obtained, and as a result, a laminate having excellent adhesive strength between the aluminum foil and a substrate made of polyester or polyamide can be obtained. The resin to be co-extruded is
Not limited to this, polyester resin, polyamide resin,
Even when coextruded with a resin having a reactive site such as an ethylene-vinyl alcohol copolymer, strong adhesion at the coextruded interface can be obtained.

As described above, by using the adhesive resin composition of the present invention, it is possible to obtain a laminate having strong adhesion to various substrates. Further, in addition to the above-mentioned ones, since it can be directly bonded to paper and other thermoplastic resins, it can be applied to various laminates.

[0037]

The present invention will be described in detail with reference to the following examples. <Resin used> Resin A: LDPE Resin B-1: EMMA Resin B-2: EEA Unsaturated fatty acid ester: Epoxidized soybean oil (contact angle with a substrate having a surface treatment degree of 66 mN / m: 19 °, decomposition temperature 325 ° C.) <Preparation of Adhesive Resin Composition (Compound)> The above resin A, resin B-1 or resin B-2 is sufficiently blended by dry blending and kneaded with a twin screw extruder (processing temperature 180 ° C.). Do. At that time, a predetermined amount of the unsaturated fatty acid ester was liquid-added to prepare an adhesive resin composition (compound). <Substrate> Untreated polyester film (25 μm thick) <Preparation of laminate> The above adhesive resin composition (compound) was applied to a 25 μm thick adherend using a uniaxial co-extrusion laminator (die setting: 340 ° C.). An adhesive resin layer 2 having a thickness of 25 μm was formed on a base material made of an untreated polyester film to produce a laminate. At that time, the polyester film was subjected to in-line corona treatment so that the surface treatment degree became 60 mN / m or more (processing speed 50 m / mi).
n). In addition, a laminate composed of polyester / adhesive / polyethylene resin was prepared in advance for measuring the laminate strength, and the resulting laminate was laminated by sand lamination to obtain a laminate strength measurement sample. The thickness of the adhesive resin layer 2 of the present invention was unified to 25 μm. <Measurement / Evaluation of Peeling Strength> The peeling strength of the polyester substrate / adhesive resin layer of the laminate was measured using a separately prepared laminate strength measuring sample using a crosshead 300.
mm / min, measured by T-type peeling. In addition, as for the water-resistant adhesiveness, after the sample for measuring the laminate strength was immersed in water for 30 minutes, the peel strength at the interface was measured by the above-mentioned T-type peeling.

Example 1 An adhesive resin composition (compound) was prepared by adding 2 parts by weight of an unsaturated fatty acid ester to 100 parts by weight of resin A, and this compound was 25 μm thick by the above single-screw coextrusion laminator. An adhesive resin layer 2 having a thickness of 25 μm was formed on a substrate 1 made of an untreated polyester film of Example 1 to produce a laminate of Example 1 of the present invention shown in FIG. Further, a sample for measuring the laminate strength was separately prepared.

<Comparative Example 1> A compound made of resin A was prepared, and this compound was coated on a substrate 1 made of an untreated polyester film having a thickness of 25 μm by the above single-screw co-extrusion laminator. To form
A laminate of Comparative Example 1 was produced. Further, a sample for measuring the laminate strength was separately prepared.

<Example 2> With respect to 85 wt% of resin A,
Resin B-1 is blended at 15 wt%, and resin A + resin B-
2 parts by weight of an unsaturated fatty acid ester were added to 100 parts by weight of No. 1 to prepare an adhesive resin composition (compound), and this compound was prepared from the untreated polyester film having a thickness of 25 μm by the above-described single-screw coextrusion laminator. An adhesive resin layer 2 having a thickness of 25 μm was formed on a base material 1 to obtain a laminate of Example 2 of the present invention shown in FIG. Further, a sample for measuring the laminate strength was separately prepared.

<Comparative Example 2> With respect to 85 wt% of resin A,
A compound containing 15 wt% of resin B-1 was prepared, and this compound was formed into a 25 μm-thick adhesive resin layer 2 on a 25 μm-thick unprocessed polyester film substrate 1 by the single-screw co-extrusion laminator described above. A laminate of Comparative Example 2 was produced. Further, a sample for measuring the laminate strength was separately prepared.

Example 3 Resin A was 85% by weight,
Resin B-2 is blended at 15 wt%, and resin A + resin B-
An adhesive resin composition (compound) is prepared by mixing 2 parts by weight of unsaturated fatty acid ester with 100 parts by weight of No. 1 and the compound is made of an untreated polyester film having a thickness of 25 μm by the above-mentioned single screw co-extrusion laminator. An adhesive resin layer 2 having a thickness of 25 μm was formed on a base material 1 to produce a laminate of Example 3 of the present invention shown in FIG. Further, a sample for measuring the laminate strength was separately prepared.

<Comparative Example 3> With respect to 85 wt% of resin A,
A compound containing 15 wt% of resin B-2 was prepared, and this compound was formed into a 25 μm-thick adhesive resin layer 2 on a 25 μm-thick untreated polyester film substrate 1 by the above-mentioned single-screw co-extrusion laminator. Then, a laminate of Comparative Example 3 was produced. Further, a sample for measuring the laminate strength was separately prepared.

Example 4 Resin A was 85% by weight,
Resin B-2 is blended at 15 wt%, and resin A + resin B-
An adhesive resin composition (compound) was prepared by mixing 4 parts by weight of an unsaturated fatty acid ester with respect to 100 parts by weight of No. 1 and this compound was formed of an untreated polyester film having a thickness of 25 μm by the above-mentioned single screw co-extrusion laminator. An adhesive resin layer 2 having a thickness of 25 μm was formed on a substrate 1 to produce a laminate of Example 4 of the present invention shown in FIG. Further, a sample for measuring the laminate strength was separately prepared.

Comparative Example 4 Resin A was 85% by weight,
Resin B-2 is blended at 15 wt%, and resin A + resin B-
1 and 100 parts by weight of unsaturated fatty acid ester
A compound was prepared by blending parts by weight, and this compound was formed into a 25 μm-thick adhesive resin layer 2 on a 25 μm-thick untreated polyester film substrate 1 by the above-mentioned single-screw coextrusion laminator. A laminate was produced. Further, a sample for measuring the laminate strength was separately prepared.

Table 1 shows the results of measuring the peel strength of the laminate strength measurement samples of the above Examples and Comparative Examples.

[0047]

[Table 1]

As can be seen from the measurement results of the peel strength shown in Table 1, resin A alone consisting of LDPE, resin B-1 consisting of resin A consisting of LDPE and EMMA, and resin B-2 consisting of resin A consisting of LDPE and EEA Using an adhesive resin composition of the present invention in which an unsaturated fatty acid ester is added to a substrate 1, a 25 μm thick adhesive resin layer 2 is formed on a substrate 1 made of an untreated polyester film having a thickness of 25 μm by a single screw co-extrusion laminator. Then, by producing the laminate of the present invention, the peel strength of the adhesive resin layer 2 shows 8 N / 15 mm or more, and the peel strength of the comparative sample without addition of the unsaturated fatty acid ester is 1 N / 15 mm (average value). It was confirmed that the composition exhibited strong adhesiveness. Furthermore, even in the peel strength after immersion in water, the adhesive resin layer to which the unsaturated fatty acid ester was added hardly showed a decrease in the peel strength, whereas the peel strength of the comparative sample without the unsaturated fatty acid ester was significantly increased. Dropped. Further, it was confirmed that the adhesive resin layer to which the unsaturated fatty acid ester was added also had water-resistant adhesiveness. Further, the adhesive resin layer containing 12 parts by weight of the unsaturated fatty acid ester per 100 parts by weight of the mixed resin of the resin A composed of LDPE and the resin B-2 composed of EEA is 1/10.
Only the following peel strength was obtained, and it was also confirmed that, when the unsaturated fatty acid ester was added in an excessive amount, the unreacted unsaturated fatty acid ester bleeds at the interface of the laminate to cause adhesion inhibition.

[0049]

As described above, the adhesive resin composition of the present invention contains a general-purpose polyolefin resin, an ethylene-α, β-unsaturated carboxylic acid copolymer, an esterified product thereof, or an ionic crosslinked product. By forming an adhesive resin layer obtained by adding a predetermined amount of unsaturated fatty acid ester to a resin on a base material such as polyester with a co-extrusion laminator, the polyester base material can be used without using an adhesive. It is possible to obtain various laminates having good adhesion and water-resistant adhesion thereon. As described above, since a solvent-based adhesive has been regarded as a problem in recent years, an excellent practical effect is exhibited in the field of various laminates using the adhesive resin composition of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing the configuration of an embodiment of a laminate manufactured using the adhesive resin composition of the present invention.

[Explanation of symbols]

 1. Base material 2. Adhesive resin layer

Continued on the front page (72) Inventor Nobuo Furusawa 1-5-1 Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. (72) Inventor Mamoru Sekiguchi 1-1-5-1 Taito, Taito-ku, Tokyo Letterpress printing stock In-house F term (reference) 4F100 AB10B AB33B AH02A AK03A AK06 AK41B AK46B AK70A AK71A AL05A BA02 JA20A JB06A JB07 JL00 JL12A YY00A 4J040 BA172 DA001 DA021 DA022 DA041 DA042 DA06 DA DA102 DA071 DA072 DA071

Claims (7)

[Claims] 1. A resin A composed of a polyolefin resin, a resin B composed of an ethylene-α, β unsaturated carboxylic acid or an ionic crosslinked product or an esterified product thereof, or a mixture of the resin A and the resin B An adhesive resin comprising 0.01 to 10 parts by weight of a hydrophobic liquid unsaturated fatty acid ester having at least one unsaturated bond with respect to 100 parts by weight of the resin A + the resin B. Composition. 2. The liquid unsaturated fatty acid ester has a surface contact angle of 2 m / m with respect to a substrate having a surface treatment degree of 50 mN / m or more.
The adhesive resin composition according to claim 1, wherein the angle is 5 ° or less. 3. The adhesive resin composition according to claim 1, wherein a thermal decomposition temperature of the liquid unsaturated fatty acid ester is from 250 ° C. to 330 ° C. 4. The adhesive resin composition according to claim 1, wherein said liquid unsaturated fatty acid ester is a derivative of glycerol. 5. The adhesive according to claim 1, wherein the liquid unsaturated fatty acid ester is triglyceride, and a part of the unsaturated bond site is polarized. Resin composition. 6. The adhesive resin composition according to claim 1, wherein the polarization method is epoxidation. 7. An adhesive resin composition according to claim 1, wherein the adhesive resin composition is a polyester, polyamide,
A laminate comprising an adhesive resin layer formed on a base material such as an aluminum foil.