JP2000007047A - Oxygen-absorbing laminate packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent oxygen-absorbing laminate packaging material which can be used as a material for a retort pouch or other packaging containers wherein retort-processed or non-retort-processed bagged food having a similar taste to that of a hand-made product immediately after manufacturing and further suppressed in deterioration in taste even after several months' preservation at a normal temperature with a similar taste to that of a hand- made product can be provided, and to provide an oxygen-absorbing packaging container which is prepared using such a laminate material and can be used as a retort pouch and for other applications. SOLUTION: The oxygen-absorbing laminate packaging material can include an external layer and comprises, from an exterior, an oxygen barrier layer, a nylon layer, an oxygen-absorbing layer and a sealant layer, wherein the packaging layer especially has an intermediate layer between the nylon layer and the oxygen-absorbing layer and all faces are made of a multi-layered material including the oxygen barrier layer, while at least a part of them comprises the oxygen absorbing laminate packaging materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an oxygen-absorbing laminated packaging material characterized by having an outer layer from the outside and being constituted by an oxygen barrier layer / nylon layer / oxygen absorbing layer / sealant layer. , And an oxygen-absorbing packaging container produced using such a packaging material.

[0002]

2. Description of the Related Art In the case of a method for producing retort foods, for example, porridge, washed and dehydrated brown rice (in the case of brown rice porridge)
Also, retort treatment is performed after filling rice of various degrees together with water in a heat-resistant and light-shielding container having no air permeability and sealing it. However, this production method has not been well evaluated because it has a weak smell (rice cooked odor) peculiar to rice such as cooked rice at home and has a stuffy smell-like retort odor. Accordingly, the present applicant has conducted intensive studies on a method for producing cooked rice retort foods having the same taste as handmade products (porridge, etc.). 2-10mg
After adjusting the amount of oxygen in the headspace and the amount of oxygen in the water so as to obtain a retort treatment, a manufacturing method was established, and a patent application was already filed (Japanese Patent Application Laid-Open No. Hei 4-320657).

[0003] Retort foods are generally intended to have a shelf life of several months or more unopened at room temperature, but their taste is expected to decrease during storage,
The same applies to retort food cooked rice. This is also the case with the product obtained by the method for producing cooked rice of retort food according to the above-mentioned Japanese Patent Application Laid-Open No. 4-320657, and as a result of the evaluation of taste over time during storage at room temperature (24 ° C.), Immediately after production, even if it has the same taste as a handmade product, it develops a flavor different from that of the handmade product (unusual flavor) and the smell of cooked rice weakens over time, and the stuffy smell-like retort odor increases. .

[0004] Light, temperature and oxygen are said to be the main causes of deterioration in taste, that is, deterioration of processed foods including retort foods. Many retort foods have a light-shielding property in a container, and, for example, conventional retort food cooked rice also has a light-shielding property in a container. Therefore, it is unlikely that the taste deteriorates over time due to light. The lower the storage temperature after retort treatment, the lower the taste can be reduced.However, retort foods such as retort foods such as cooked rice have an advantage in that they can be distributed at room temperature. Storing loses its merits as a room temperature distribution product. In addition, it is impossible to adjust the temperature of the natural environment in summer or winter, and it is difficult to suppress a change in taste over time due to the temperature dependence of a normal-temperature distribution product.

In order to suppress the decrease in taste due to oxygen,
Conventionally, methods such as preventing oxygen permeation of the container and replacing inert gas in the container have been common. JP-A-4-32, cited above
In Japanese Patent No. 0657, retort food cooked rice is cooked and sterilized by retort by adjusting the amount of oxygen in a headspace and the amount of oxygen in water so that the amount of oxygen in a container is 2 to 10 mg per 100 g of raw rice. , It was confirmed that it had the same taste as handmade products (porridge etc.). This is due to the fact that sulfur-containing amino acids in rice grains react with oxygen in the cooking and sterilization process by retort to produce hydrogen sulfide, ammonia, carbonyl compounds, etc. It was considered to have the same taste as handmade products (such as porridge). Incidentally, the material of the retort food cooked rice container (retort pouch) does not have an oxygen absorbent layer unlike the present invention.

[0006] As mentioned above, immediately after production, it has the same taste as a handmade product (porridge etc.), and even after being stored at room temperature for several months, the same taste as a handmade product is suppressed. Providing retort food cooked rice having the above-described method is disclosed in Japanese Patent Application Laid-Open No. Hei 4-320657, and more specifically, by using a substantially oxygen-impermeable container (retort pouch) disclosed therein. It is not easy.

[0007] Incidentally, Japanese Patent Application Laid-Open No. Hei 10-53281 describes "the problem to be solved by the invention" as follows: "The deterioration of the quality of food, which was conventionally considered inevitable in molded food packages, is caused by the problem of molded food packages. Considering that this is a problem that must be solved in order to improve the product value and extend the storage period, the present invention solves this problem, and there is no deterioration in flavor and color tone due to trace residual oxygen, and long-term storage stability And a "molded food package in which conventional oxygen scavengers cannot be used in view of the problems to be solved" as "means for solving the problem". As a result of applying various oxygen-absorbing resins containing oxygen absorbers and removing trace residual oxygen in the package, at least a part of the gas barrier packaging container for storing the molded food was absorbed with oxygen absorbers. Composed of fat, by so as to absorb oxygen in the container filled with food, and have completed the present invention can solve the problems. "
And "That is, the present invention, as a means for solving the problem, absorbs oxygen in a container, wherein at least a part of the container is made of a deoxidizing multilayer material having a resin layer in which an oxygen absorbent is mixed with a thermoplastic resin. The molded food packaging body is characterized in that the food is solidified after filling the gas-barrier packaging container with the food in a liquid or semi-liquid flow state and sealing the container. Is a food that is liquid or semi-liquid at the time of filling into a container and solidified according to the shape of the container after filling. " See paragraphs 4 to 6 of the above publication.

However, in the invention described in Japanese Patent Application Laid-Open No. Hei 10-53281, the food package is a molded food package, which is completely different from retort foods that do not require molding. In addition, as for the material of the container of the present invention, as described above, at least a part of the container is made of a deoxidizing multilayer material having a resin layer in which an oxygen absorbent is blended with a thermoplastic resin, and the inside of the container is Although it is a gas barrier packaging container that absorbs oxygen, the shape is for molded food packaging, so it consists of a molding body and a lid (material) for it, whereas retort foods Is a retort pouch (pillow pouch, flat pouch, standing pouch, etc.).

Looking at the current state of retort pouches, "Retort Pouch [Retort Pouch] Reto"
rtable pouch A retort pouch is a heat-resistant container made by laminating a metal foil and a plastic film with an adhesive, and making this into a bag. It is flexible and is a representative example of a flexible container as compared to a rigid container such as a can or a bottle. The shape is a pillow shape and a standing pouch made of this pillow. The content can be broadly classified according to the preservation performance of the food, including those containing aluminum foil and those without aluminum foil. Retort pouches containing aluminum foil are classified into those having a three-layer structure and those having a four-layer structure. The three-layered pouch usually uses biaxially stretched polyester (12 μm) for the outermost layer, aluminum foil (7 to 9 μm) for the intermediate layer, and polypropylene (40 to 70 μm) for the innermost layer. In the case of a large pouch for business use, a pouch having a three-layer structure is insufficient in the drop impact strength, and a pouch having a four-layer structure is used. It is common to provide another layer of film as the shock absorbing layer inside or outside the aluminum foil, and nylon or polyester is used. (Omitted) The laminating structure of the standing pouch is biaxially oriented polyester / biaxially oriented nylon / aluminum foil /
A typical example is a four-layer structure of unstretched polypropylene. (Omitted) ”(edited by the Japan Food Industry Association,“ New Edition of the Food Industry General Encyclopedia ”(1993, published by Korin Co., Ltd.)
See page 1350).

[0010] Thus, reference is made here to not only mention but also suggestion of including the oxygen absorbent layer in the laminated structure which is the material of the retort pouch, and even less of the case where the oxygen absorbent layer is included. Not done.

[0011]

SUMMARY OF THE INVENTION Under the background of the prior art described in the preceding paragraph, an object of the present invention is to have the same taste as a handmade product (porridge etc.) immediately after production, and further store at room temperature for several months. Excellent oxygen absorption that can be used as a material for retort pouches and other packaging containers that can provide retorted or non-retorted bagged foods that have the same taste as handmade products with reduced taste deterioration Laminated materials,
In addition, it is an object of the present invention to provide an oxygen-absorbing packaging container which can be used for retort pouches and other uses made using such a laminated material.

[0012]

Under the technical background described in the preceding paragraph, in particular, in the background of the technique described in Japanese Patent Laid-Open No. Hei 4-320657, the problem described in the preceding paragraph was recognized. Other than the storage temperature after the retort treatment, it was considered that the remaining oxygen was not consumed by the reaction in the cooking and sterilization process by the retort. Accordingly, the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, by using an oxygen-absorbing agent-containing container that has heat resistance and light-shielding properties and has no oxygen permeability, it is similar to a handmade product immediately after production. It has a taste of, and furthermore, a decrease in taste is suppressed even when stored at room temperature for several months, and it has been found that retort seasoning foods having the same taste as handmade products, retort food cooked rice and the like can be obtained,
The present invention has been completed.

That is, the present invention provides an oxygen-absorbing laminated packaging material characterized by having an outer layer from the outside and being constituted by an oxygen barrier layer / nylon layer / oxygen absorbing layer / sealant layer, and An oxygen-absorbing laminated packaging material, particularly such a packaging material, comprising an intermediate layer between the nylon layer and the oxygen-absorbing layer;
Also, the present invention relates to an oxygen-absorbing packaging container characterized in that the entire surface is a multilayer material including an oxygen barrier layer, at least a part of which is made of these oxygen-absorbing laminated packaging materials.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

First, the oxygen-absorbing laminated packaging material of the present invention will be described.

As described above, the oxygen-absorbing laminated packaging material of the present invention can have an outer layer from the outside, and is constituted by an oxygen barrier layer / nylon layer / oxygen absorbing layer / sealant layer. Oxygen-absorbing laminated packaging material.

In such a laminated packaging material, the outer layer which can be provided on the outside is not particularly limited, and examples thereof include materials such as polyethylene terephthalate [PET].

As will be described later, the thickness of the nylon layer can be 3 to 40 μm, assuming that the thickness of the entire packaging material of the present invention is about 200 μm or less.

Although there is no particular limitation on the oxygen barrier layer,
It is preferably a layer containing at least a metal foil such as aluminum or a metal deposition film.

As the oxygen absorber, any of the conventionally known oxygen absorbers can be used. In particular, iron powder is used as a main agent, and alkali metal halides such as sodium chloride and calcium chloride or alkali earth metal halides are oxidized. What is used as an accelerator is suitable from a viewpoint of hygiene and oxygen absorption capacity.
The oxygen absorbing layer can be formed by kneading an oxygen absorbing agent with a polyolefin or the like.

The material of the sealant layer (heat seal layer) can also be polyolefin, and the heat seal layer is preferably colored white.

When a polyolefin is used as a material in each of the above-mentioned layers, such a polyolefin is preferably polypropylene or a polypropylene copolymer having a propylene content of 70% or more.

Conventionally, in the case of a pouch having a three-layer structure, a pouch having a four-layer structure is used when the drop impact strength is insufficient, that is, another film is provided on the inside or outside of the aluminum foil as a shock absorbing layer. In general, nylon and polyester are used ("New Edition Food Industry General Encyclopedia" mentioned above). Here, in addition to the fact that nylon is not provided in parallel with the oxygen absorbent layer, the action and effect of the present invention are also described in the present invention. Different from

More specifically, nylon is usually applied on the outer side of a barrier layer such as aluminum foil, and no prior example can be found on the inner side in relation to the deoxidized packaging material. (A) The iron-based oxygen scavenger component increases in particle size due to generation of rust due to oxygen absorption. In other words, iron powder (rust) protrudes from the oxygen scavenger layer, but nylon has a moderate flexibility ("stiff").
Is used, and the piercing strength is particularly excellent, so that the rust can be prevented from protruding. Also, (b) the salt of the oxidation promoter of the iron-based oxygen scavenger gradually migrates through the material during the heat treatment or changes over time and corrodes the metal foil. Nylon has a large effect of preventing the migration of salt. And, in turn, prevent corrosion. For this reason, by applying nylon inside, the effect of preventing peeling of the packaging material laminate over time is large, and this effect is particularly remarkable in the retort packaging material. Etc.). It is one of the most important features of the present invention to exhibit such an effect of nylon in the oxygen-absorbing laminated packaging material.

One example of the laminated packaging material of the present invention is provided with a nylon layer provided between a gas barrier layer and an oxygen absorbing layer.
The layer configuration is, for example, PET / AL (aluminum) foil /
It is a laminated material of NY (nylon) / oxygen absorbing layer / sealant layer. As a result, corrosion of the aluminum foil (AL foil) due to migration of additives (calcium chloride, sodium chloride, etc.) in the oxygen absorbing layer can be prevented (using the barrier property against salt of nylon), and iron powder can be prevented. When oxidized and expanded, it can be prevented from contacting the aluminum foil and corroding the aluminum foil or breaking through the aluminum foil (using the high piercing strength of nylon).

Such a laminated material is NY
An intermediate layer such as a polyolefin can be disposed between the (nylon) layer and the oxygen absorbing layer. The layer structure in this case is, for example, PET / AL foil / NY / intermediate layer / oxygen absorbing layer / sealant layer. When the material of the intermediate layer is a polyolefin, the polyolefin is preferably polypropylene or a polypropylene copolymer having a propylene content of 70% or more, as described above.

[0027] In such a laminated material, the ratio of the thickness of the sealant layer to the thickness of the polyolefin intermediate layer disposed between the nylon layer and the oxygen absorbing layer is particularly in the range of 1: 0.3 to 1: 2.5. Are preferred. As a result, the internal pressure of the oxygen-absorbing layer increases when it is oxidized, and the oxygen-absorbing layer attempts to escape to the inside or the outside. Then, the components of the oxygen absorbing layer migrate to the contents. Further, if the sealant layer is too thick, the problem that delamination occurs between the nylon layer opposite to the sealant layer and the polyolefin intermediate layer can be effectively solved.

As described above, the oxygen-absorbing packaging material of the present invention can be used not only for producing retort pouches for producing retort foods of excellent quality, but also for producing retort pouches.
Of course, it can be used for other non-retort pouch applications where similar performance is required for packaging materials.

Next, a packaging container made of the above-described oxygen-absorbing laminated packaging material will be described.

The packaging container according to the present invention is an oxygen-absorbing packaging container characterized in that the entire surface is a multilayer material including an oxygen barrier layer, at least a part of which is made of the oxygen-absorbing laminated packaging material described above. Yes, especially that of a bag. This bag is preferable as a retort pouch (flat pouch, pillow-shaped pouch, standing pouch, etc.), but is not necessarily limited to a retort pouch, and is deteriorated in quality by oxygen or light that does not undergo high-temperature, high-pressure retort treatment. Needless to say, it can be used as a packaging container for foods and non-foods in which foods are generated. Examples of the food to be contained in the packaging container of the present invention include foods such as semisolid porridge, solid cooked rice, powdery or granular seasonings, and the like.

The oxygen-absorbing laminated packaging material of the present invention is rarely used for thick packaging materials such as sheets and is useful for retort pouches for retort foods.
The thickness can be usually less than the thickness of the film, that is, about 200 μm or less.

The method for preparing a packaging container such as a retort pouch using the oxygen-absorbing laminated packaging material of the present invention is not particularly limited per se, and can be appropriately followed by a conventional method.

[0033]

The present invention will be further described with reference to the following examples.

Example 1 Granular anhydrous calcium chloride was added to iron powder having an average particle diameter of 10 μm by 20% in terms of weight in terms of weight, and the anhydrous calcium chloride was pulverized and ground into iron powder using a vibration mill in which the inside was replaced with an inert gas. Coating was performed to obtain an oxygen absorbent. Next, the obtained oxygen absorbent was added to a pent-coated 2
Using an extruder with a shaft, the iron powder content is 20% by weight
The resulting strands were kneaded with low-density polyethylene, and the resulting strands were pelletized with a pelletizer to obtain a resin composition for forming an oxygen-absorbing layer. This is called resin composition A.

The oxygen absorbent-containing resin composition A was extruded from a T-die on a titanium oxide-containing white low-density polyethylene [LDPEw] (30 μm) using an extruder to form an oxygen-absorbing layer a (30 μm). A laminate was obtained. The layer configuration of this laminate is as follows.

That is, the oxygen absorption layer a (30 μm) / L
DPEw (30 μm).

After the surface of the oxygen-absorbing layer of the obtained laminate was subjected to corona treatment, polyethylene delephthalate [PET] / aluminum foil / stretched nylon (15 μm) laminated with a urethane-based adhesive by a usual dry lamination method
And an oxygen-absorbing laminate by dry lamination with a urethane-based adhesive. The layer configuration of this laminate is as follows.

That is, PET / aluminum foil / stretched nylon (15 μm) / oxygen absorbing layer a (30 μm) / LDPE
w (30 μm).

A 20 cm × 20 cm flat pouch prepared using the laminate obtained in this manner was filled with 30 ml of air.
Together with a saturated sodium bromide aqueous solution and a highly air-permeable nonwoven pouch enclosing sodium bromide powder for the purpose of controlling humidity, and keeping the internal humidity at 58% RH in a 24 ° C. environment. After storing for a month, the oxygen concentration of the gas in the pouch was measured. Further, the pouch after storage for 6 months under the same conditions was visually observed in order to confirm corrosion of the aluminum foil.
The results are shown in Table 1 below.

[0040]

[Table 1]

As shown in the above table, the oxygen absorbing ability was good, and the corrosion of the aluminum foil was prevented by disposing the nylon layer between the aluminum foil as the gas barrier layer and the oxygen absorbing layer.

Comparative Example 1 The oxygen-absorbing layer a (3) which was the two-layer laminate obtained in Example 1
0 μm) / LDPEw (30 μm), the surface of the oxygen absorbing layer is corona-treated, and then the PET / aluminum foil laminated with a urethane-based adhesive by a normal dry lamination method is dry-laminated with a urethane-based adhesive. An absorbent laminate was obtained. The layer configuration of this laminate is as follows.

That is, PET / aluminum foil / oxygen absorbing layer a (30 μm) / LDPEw (30 μm).

The obtained laminate was evaluated in the same manner as in Example 1. The results are also shown in Table 1. As shown in this table, the oxygen absorption capacity was good, but the nylon layer was not disposed between the aluminum foil as the gas barrier layer and the oxygen absorption layer. Corrosion was observed.

Example 2 In the method for producing the resin composition A for forming an oxygen absorbing layer described in Example 1, anhydrous calcium chloride was replaced with sodium chloride.
Then, exactly the same operation was performed except that the low-density polyethylene was changed to polypropylene to obtain a resin composition for forming an oxygen absorbing layer. This is called resin composition B.

PET / aluminum foil / stretched nylon (15 μm) / unstretched polypropylene [CP laminated with urethane-based adhesive by ordinary dry lamination method
P] (X μm) and titanium oxide-containing white unstretched polypropylene [CPPw] (Y μm), extruding the oxygen absorbent-containing resin composition B from a T-die using an extruder,
An oxygen-absorbing layer b (30 μm) was formed to obtain an oxygen-absorbing laminate of the present invention. The layer configuration of this laminate is as follows.

That is, PET / aluminum foil / stretched nylon (15 μm) / CPP (X μm) / oxygen absorbing layer b (3
0 μm) / CPPw (Y μm).

Here, (X, Y) = (20, 60),
Three types of laminates were prepared using three types of combinations (30, 30) and (50, 20).

The flat pouch of 20 cm × 20 cm prepared using the laminate obtained in this manner was filled with 200 m of degassed water.
1 and 30 ml of air were sealed and subjected to a retort treatment at 125 ° C. for 30 minutes, and then the oxygen concentration of the gas in the pouch was measured. After storing the retorted pouch in a 24 ° C. environment for 6 months, the oxygen concentration of the gas in the pouch is measured, and at the same time, the pouch surface is checked for corrosion of aluminum foil and the presence of delamination. The inner surface was visually observed to confirm the pinhole. The results are shown in Table 2 below.

[0050]

[Table 2]

From these results, it can be seen that, by disposing the nylon layer between the gas barrier layer and the oxygen absorbing layer, the aluminum foil did not corrode, and both the oxygen removing ability of the contents and the maintenance of the oxygen-free state were good. Was. Then, since the ratio of X and Y is appropriate, the internal pressure generated in the oxygen absorbing layer is maintained in a well-balanced manner.
Not confirmed.

Comparative Example 2 The combination of X and Y in Example 2 was changed to (X, Y)
= Except for changing to (20, 80) and (60, 20), the same evaluation as in Example 1 was performed. The results are also shown in Table 2.

By disposing the nylon layer between the gas barrier layer and the oxygen absorbing layer, the aluminum foil did not corrode, and the contents had good oxygen removal ability and good oxygen-free state. , Y) = (20, 80), since X is too small compared to Y, the balance for maintaining the increased pressure in the oxygen absorbing layer is broken, and the layer indicated by X loses the pressure. Delami occurred. Also, (X,
In the case of (Y) = (60, 20), on the contrary, Y was too small compared to X, and the layer side indicated by Y lost pressure, and pinholes were generated.

Comparative Example 3 The oxygen absorbent-containing resin composition B described in Example 3 was extruded from a T-die onto CPPw (30 μm) using an extruder.
The following laminated body was obtained by forming an oxygen absorbing layer b (30 μm).

That is, the oxygen absorbing layer b (30 μm) / C
PPw (30 μm).

After the surface of the oxygen-absorbing layer of the obtained laminate was subjected to corona treatment, PET / stretched nylon (15 μm) / aluminum foil / CPP (30 μm) laminated with a urethane-based adhesive by a usual dry lamination method. An oxygen-absorbing laminate was obtained by dry lamination with a urethane-based adhesive. The layer configuration of this laminate is as follows.

That is, PET / stretched nylon (15 μm)
m) / Aluminum foil / CPP (30 μm) / Oxygen absorbing layer b
(30 μm) / CCPw (30 μm).

The obtained laminate was evaluated in the same manner as in Example 2. The results are also shown in Table 2 above. In this case, because the nylon layer was arranged outside the gas barrier layer, the corrosion and delamination of the aluminum foil occurred over time due to the influence of the oxygen absorbing layer, and it was found that the internal oxygen-free state could not be maintained. .

Reference Example 1 Using a standing pouch (120 × 180 mm) made of the same packaging material as in Example 2, 250 g of milled rice (20 g) and water (230 g) were put into the inside, and heat sealed. After sealing, heat sterilization under pressure (121
° C, 8 minutes). After cooling for one day, when opened, a porridge was formed, which had no off-flavor and had the same taste as "porridge" made at home for a long time in a clay pot.

[0060]

EFFECTS OF THE INVENTION Immediately after production, a retort-treated or non-retorted product having the same taste as a handmade product (porridge, etc.) and having a reduced taste even when stored at room temperature for several months and having the same taste as a handmade product An excellent oxygen-absorbing laminate that can be used as a material for retort pouches and other packaging containers that can provide retort-treated bagged foods, and furthermore, retort pouches made using such laminates, An oxygen-absorbing packaging container that can be used for other purposes is easily provided.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yuuki Miyazawa 1-1, Suzukicho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Ajinomoto Co., Inc. (72) Inventor Tohru Ikeda Suzukicho, Kawasaki-ku, Kawasaki-shi, Kanagawa 1-1 Ajinomoto Co., Ltd. Production Technology Research Laboratory (72) Masao Yamane 1-1, Suzukicho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Ajinomoto Co., Ltd. Production Technology Research Laboratory F-term (reference) 3E067 AB01 BA12A BB11A BB14A BB16A BB25A CA06 CA24 EA06 EB01 EE48 FB13 FC01 GC02 3E086 AA23 AB01 AD01 BA04 BA13 BA15 BB05 BB49 BB51 CA01 4F100 AB01A AB02C AB33A AK03C AK03D AK03E AK07C AK07D AK07E15A01 BA01 AR01 BAO JD03A JD03C JK20D

Claims (8)

[Claims] 1. An oxygen-absorbing laminated packaging material which can have an outer layer from the outside and is constituted by an oxygen barrier layer / nylon layer / oxygen absorbing layer / sealant layer. 2. The oxygen-absorbing laminated packaging material according to claim 1, further comprising an intermediate layer between said nylon layer and said oxygen-absorbing layer. 3. The oxygen-absorbing laminated packaging material according to claim 2, wherein the ratio of the thickness of the sealant layer to the thickness of the intermediate layer is from 1: 0: 3 to 1: 2: 5. 4. The method according to claim 1, wherein the oxygen barrier layer is a layer including at least a metal foil or a metal vapor-deposited film, and the oxygen absorbing layer is a polyolefin containing an oxygen absorbent containing iron powder as a main component. The oxygen-absorbing laminated packaging material according to claim 1. 5. The material of the base material of the sealant layer, the oxygen absorbing layer and the intermediate layer is a polyolefin, and the polyolefin has a polypropylene or propylene content of 7%.
The oxygen-absorbing laminated packaging material according to any one of claims 1 to 4, which is 0% of a polypropylene copolymer. 6. An oxygen-absorbing package characterized in that the entire surface is a multilayer material including an oxygen barrier layer, at least a part of which is made of the oxygen-absorbing laminated packaging material according to any one of claims 1 to 5. container. 7. The oxygen-absorbing packaging container according to claim 6, wherein the shape is a bag. 8. A retort food product produced by using the oxygen-absorbing packaging container according to claim 7.