WO2011045455A1

WO2011045455A1 - Packaging for perishable products

Info

Publication number: WO2011045455A1
Application number: PCT/ES2010/070425
Authority: WO
Inventors: Julián ESCARPA GIL
Original assignee: Sp Berner Plastic Group, S.L.
Priority date: 2009-10-16
Filing date: 2010-06-24
Publication date: 2011-04-21
Also published as: ES2357820A1; ES2357820B1

Abstract

Packaging for perishable products. Packaging for perishable products, which is characterized in that it comprises: a) an outer layer and an inner layer characterized in that they comprise at least one base polymer and at least one adhesive agent; and b) an intermediate layer of at least one oxygen-barrier polymer; in which at least one of the aforementioned layers comprises, in turn, at least one oxygen-sequestering additive. Furthermore, a subject matter of the present invention will be the method for producing said packaging and the use thereof for preserving perishable products.

Description

Packaging for perishable products Technical Field

The present invention relates to the field of the conservation of perishable products, more specifically to the field of the conservation of foods especially sensitive to oxygen.

State of the art prior to the invention

The protection against oxygen of foods sensitive to oxidation is vital to keep intact its organoleptic qualities of aroma and flavor. For this reason, one of the most important requirements when selecting the most appropriate type of material to be used in the manufacture of food preservation containers is their resistance to the passage of oxygen. In this sense, among the most suitable materials due to their lower permeability to the passage of this gas, it is possible to mention, among others, metals and glass.

However, in recent years, the economic interest of these materials in the manufacture of food canning containers has led to the development of new ones based, for example, on polymeric materials. Among the most common polymeric materials, polyolefins are worth mentioning. However, due to their high permeability to the passage of oxygen, these polymers are unsuitable for use in the manufacture of canned containers. Other polymers in common use, such as polyethylene terephthalate (PET), although they have a much lower permeability to the passage of oxygen, it does not become low enough to achieve the preservation periods that are desired to be achieved.

This has led to the development of new materials characterized by combining the use of thermoplastic materials, easy to manufacture, with the introduction of other polymers or fillers of different nature within the structure of the container wall.

In this way, the use of ceramic nano-loads has been proposed, such as montmorillonite which, due to its mere presence in the polymer matrix, hinders and slows the passage of oxygen through the wall of the container. However, said nanoloads in turn have certain disadvantages, especially with regard to the difficulty in achieving a uniform dispersion and orientation within the base polymer, which on the other hand is a particularly critical characteristic to achieve a barrier. effective against oxygen.

As an alternative, in recent years new adhesive coatings have been developed characterized by being applied by various technologies on the packaging once it has been manufactured. These coatings include, for their effectiveness, silicon oxide coatings deposited on the inner or outer surface of the container by plasma activation of the polymer.

Likewise, the combined use of at least one base polymer and at least one oxygen barrier polymer has also been proposed. Among the polymers capable of acting as an oxygen barrier are, among others, ethylene vinyl alcohol (EVOH), vinylidene polychloride (PVDC), nitrile polyacryl (PAN) or, more recently, liquid crystal polymers (LCP).

However, this multilayer combination of polymer and oxygen barrier, despite substantially reducing the permeability of the container wall to the passage of oxygen, does not guarantee periods of conservation for more than one year in the case of the preservation of foods especially sensitive to oxidation such as canned meat or fish, dairy products, or canned vegetables and pre-cooked foods.

In order to further improve their effectiveness, a series of additives have been developed for both the oxygen barrier polymers and the base polymer characterized by presenting an oxidation capacity superior to that of the food itself, which allows them to lead to out the sequestration of most of the oxygen that penetrates through the oxygen barrier layer.

This combination of oxygen barrier and sequestering additive makes it possible to obtain polymeric complexes with sufficient oxygen protection to ensure the correct preservation of foods more sensitive to oxidation for periods of time similar to those achieved through the use of conventional packaging of glass or metal.

However, although the above solution makes it possible to obtain containers with a good efficiency against the passage of oxygen, it nonetheless has certain disadvantages due, fundamentally, to the incompatibility of the barrier polymers with the base polymers which consist essentially of polyolefins. This incompatibility is due to the absence of polar groups in the polyolefin molecule, as well as to the fact that the known barrier polymers are all polar. Thus, it has only been possible to manufacture these multilayer complexes either by extrusion and subsequent thermoforming, by combining intermediate layers of adhesive between the oxygen barrier layer and the polyolefin layers, or by using compatible polymers with polymers oxygen barrier using polyethylene terephthalate (PET) as the base polymer. Specifically, the combination of PET-EVOH-PET is especially appreciated for its low oxygen permeability. However, despite its good characteristics, this combination has the disadvantage, on the one hand, of the high permeability of PET to water vapor as well as, on the other hand, of the great sensitivity that EVOH presents to the presence of moisture . Due to this, although the PET-EVOH-PET combination makes it possible to carry out the manufacturing of the containers by means of the injection process, the EVOH oxygen barrier present in them could be affected during the subsequent autoclave stage, very common in the manufacture of canned goods, or, in the case of not undergoing the autoclave process, once the containers have been manufactured, their permeability could be strongly affected by the variations in environmental humidity to which they are subjected during their useful life.

For its part, the formation of multilayer complexes by extrusion and subsequent thermoforming has the disadvantage of requiring the formation of a minimum number of five layers, thus making its manufacture impossible by injection technology since it is limited to three layers. Thus, extruded laminates with PP-adhesive-EVOH-adhesive-PP structures (PP being polypropylene) have appeared on the market, which can then be subjected to a thermoforming process for the final obtaining of the packages.

It will therefore be the object of the present invention, to present a new container especially suitable for perishable products because it has a high efficiency against the passage of oxygen. In the same way, the procedure of obtaining said container, as well as its use in the preservation of products especially sensitive to oxygen. Description of the invention

The present invention relates to a new container for perishable products characterized in that it comprises:

a) an outer layer and an inner layer characterized by comprising at least one base polymer and at least one adhesive agent; Y

b) an intermediate layer of at least one oxygen barrier polymer;

and where at least one of the above layers in turn comprises at least one oxygen sequestrant additive.

Likewise, a particular embodiment of the invention is characterized by comprising an additional internal layer of polypropylene, in order to avoid migrations of the additives used towards food, which could damage them.

For the purposes of this invention, the base polymer of the outer and inner layer of the package consists of a polyolefin preferably selected from a group consisting of polyethylene, polypropylene, and copolymers of propylene and ethylene, butene or other alpha olefins such as hexene or octene, as well as any combination of the above. Preferably, the monomer used is ethylene, preferably in a proportion that represents up to about 5% by weight, and may also contain additives as clarifiers, well known commercially.

Additionally, heterophasic copolymers or propylene block copolymers may also be used. Among the former are copolymers that contain a low stiffness phase consisting of a copolymer of propylene and ethylene or 1-butene dispersed in a matrix of propylene polymer of high rigidity. The high stiffness polypropylene matrix contains from 0 to about 5% by weight of definites that are not propylene, while the low stiffness phase is composed of propylene copolymer containing up to 35% by weight of a comonomer that is not propylene

On the other hand, in order to achieve sufficient adhesion between said base polymer, not polar, and the oxygen barrier polymer, polar, in the present invention the base polymer is modified by an adhesive agent or compatibilizing agent, preferably, in a percentage between 1 and 25%, more preferably between 1 and 20% by weight of the outer or inner layer in which it is comprised. These adhesive agents are preferably selected from a group consisting of polyethylene or polypropylene polymers containing graft polar groups; copolymers of ethylene and acrylic or methacrylic acid; copolymers of ethylene and acrylates or acetates; and derivatives of glycidyl methacrylate, or any combination of the foregoing.

In a preferred embodiment of the invention, the adhesive agent will consist of polypropylene with maleic graft anhydride. In another preferred embodiment, the adhesive polymer will consist of polypropylene with acrylic graft acid. Finally, in a more preferred embodiment, the adhesive polymer will consist of a styrene-ethylene butylene-styrene copolymer with graft maleic anhydride.

Preferably, the percentage of polar graft groups in the polypropylene will be less than 15% by weight with respect to the adhesive polymer. In a embodiment of the invention in which the grafted polar group consists of acrylic acid, said acrylic acid will preferably be in a proportion less than 7% by weight of the adhesive polymer. In the case where the grafted polar group consists of maleic anhydride, said maleic anhydride will preferably be found in a proportion less than 5%, more preferably less than 3% by weight of the adhesive polymer.

With respect to the oxygen barrier polymer, for the purpose of the invention it is understood as an oxygen barrier polymer a polymer capable of acting as a physical barrier for the transmission of oxygen, allowing to reduce, thanks to its presence, the permeability that the vessel wall would have if only it was constituted by the base polymer of the outer layers.

Preferably, said oxygen barrier polymer is selected from a group consisting of ethylene vinyl alcohol (EVOH), vinylidene polychloride (PVDC), nitrile polyacryl (PAN), liquid crystal polymers (LCP), or any mixture of the above. More preferably, the oxygen barrier polymer used will be EVOH.

Finally, the oxygen oxygen sequestrant additive, also known as an oxygen absorber, eliminator or scavenger, refers to a compound that is capable of irreversibly eliminating oxygen, both the residual inside the package and the one entering the outside, through a chemical oxidation reaction faster than the food itself. The oxygen sequestrant additives used may consist of organic materials, preferably polymeric, and non-polymeric inorganic materials containing inorganic compounds in their composition. Both are able to react irreversibly with oxygen presenting various activation mechanisms to act preferably in the packaging process, or once the package has already been closed.

Among the wide variety of oxygen, metal or organic sequestrant additives that can be used for the invention, the most appropriate one can be selected based on cost criteria, capacity per unit weight to react irreversibly with oxygen and compatibility with components Polymers of the constituent materials of the layers of the container to which they wish to incorporate, as well as based on the manufacturing process thereof. Additionally, the following factors must be taken into account: the amount of initial or remaining oxygen when closing the container; the rate of oxygen entry through the wall, in the absence of the oxygen sequestrant; the type of product or food to be packaged; the maximum oxygen concentration allowed in the container; the shelf life of the product or food to be packaged; how to activate the system or how to accelerate the oxygen absorption process once it has been packaged; or the rate of absorption or irreversible reaction with the oxygen of the sequestering additive.

As suitable oxygen sequestering polymers within the framework of this invention, those that are compatible with both the base polymer and adhesive agent layers are preferably selected when they are to be incorporated into said layers or with the inner barrier polymer layer when this is the case, so that a good dispersion or mixture of the oxygen sequestering polymer is obtained in the layer to which it is incorporated.

In a preferred embodiment of the invention, the oxygen sequestering additive comprises from 1 to 15% by weight with respect to the layer containing it of at less an oxidizable organic polymer. This oxidizable organic polymer is preferably selected from a group consisting of copolyesters or copolyamides containing oligomeric segments derived from butadiene incorporating free olefinic unsaturated bonds in the main chain of the copolymer; copolyesters containing comonomers incorporating free olefinic unsaturated bonds on the side branch of the copolymer; ethylene copolymers containing chronomers incorporating free olefinic bonds on the side branch of the copolymer and polymers derived from cyclic diolefins, or any combination of the foregoing. Preferably, said oxidizable organic polymer consists of a copolymer of a vinyl aromatic monomer and a diene; a copolymer of ethylene propylene and a diene; or a cyclic ethylene-olefin copolymer such as ethylene norbornene polymers.

This oxidizable sequestering polymer can in turn be used pure or diluted previously in a polymer matrix before being incorporated into the package, said polymer matrix being preferably selected from a group consisting of polypropylene, polyethylene, polyethylene terephthalate, ethylene acrylic acid, ethylene vinyl acetate and ethylene butylacrylate, or Any combination of the above.

Also, preferably, the invention will in turn comprise a catalyst, preferably a derivative of a transition metal, which will preferably be selected from a salt or an iron, cobalt, nickel or manganese oxide. Preferably, this catalyst will consist of cobalt salts derived from organic acids, such as stearic, octenyl succinic, ethylhexanoic and oleic, among others and will be comprised between 1 and 6000 ppm, more preferably, from 5 to 2000 ppm in terms of the transition metal. Thanks to the presence of the catalyst, it will be possible to activate the reaction of the oxygen with the oxygen-sequestering polymer, thus facilitating the elimination of the oxygen that passes through the container.

In general, most of the oxygen sequestering additives can be mixed with the constituent layers components of the multilayer structure of the package or included in additional adjacent layers. In this way, said sequestering additives can be found incorporated in the wall of the container, or even in the caps or lids that it can comprise.

In the event that the oxygen sequestrant additive is of an inorganic nature, it will preferably comprise iron. In a preferred embodiment, said inorganic oxygen sequestrant additive will comprise at least one derivative of ascorbic acid or an alkali sulphite, or any combination of the foregoing.

In a particularly preferred embodiment of the invention, the package will further comprise a photoinitiator that will be selected from a group consisting of benzophenone, acenaphthenoquinone, diethoxyacetophenone, o-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, or any combination of the above. These photoinitiators are activated to function properly in the system consisting of the oxygen sequestrant additive, the catalyst and the photoinitiator itself using visible or UV radiation preferably with a wavelength between 200 and 700 nm and, more preferably, between 200 and 400 nm.

The proportion of catalyst, photoinitiator and oxygen sequestrant polymer comprised in the The layers of the container are calculated in such a way that the reaction of the latter with the oxygen is activated at a rate such that the presence of oxygen in the free space of the container once it is closed is between 50 and 200 ppm by weight. to the total weight of the container of the invention.

Also, the package of the present invention may additionally comprise other additives, preferably selected from colorants, fillers, nucleating additives, impact modifiers and stabilizing agents or any combination thereof. Even more preferably, this additive will consist of an antioxidant preferably, between 0.01% and 0.5% of the total weight of the package.

Regarding the size of the container, preferably, the total thickness of the wall of the container will be between 300 microns and 2 mm, while the thickness of the inner layer of barrier material will be between 5 and 100 microns and more preferably between 8 and 80 microns. On the other hand, the shape of the package is not particularly limited so, depending on the use, it can have the shape of a wide-mouth container commonly used to contain mostly solid foods or it can consist, for example, of a mouth container narrow, cup or cup type, in cases where it is required.

One of the main advantages of the package of the present invention is its ability to protect food contained inside it from oxygen, especially foods extremely sensitive to oxidation, such as canned meat or fish, Dairy products, or canned vegetables and pre-cooked foods, guaranteeing a duration of qualities organoleptic of these foods for a period of time greater than 3 years.

When quantifying the ability to absorb or remove oxygen from the container, it is possible to use different methods. Specifically, one of these methods may consist of analyzing the decreasing oxygen content over time of the vacant space of a perfectly hermetic container by means of equipment such as the Optics Foxy Oxygen Sensor System marketed by OCEAN OPTICS Inc.

In turn, the rate of oxygen transmission through the wall of the container can be adequately measured with also commercially accessible equipment such as the OX-TRAN from MOCON Inc.

Finally, the measurement of oxygen permeability can be carried out by the methods described in US5639815. In general, the oxygen permeability of the container of the present invention, understood as the capacity of the material that constitutes it to allow the passage of oxygen without altering its internal structure, will be less than 0.5 ce mm / (m2 day atmosphere) , more preferably, less than 0.1 ce mm / (m2 day atmosphere) at a relative humidity of 50%.

In a further preferred embodiment of the invention, the package may in turn comprise an additional inner layer, preferably, of base polymer, in order to avoid possible migrations of the additives comprising the package, as well as of the products resulting from the reactions of oxidation of the oxygen sequestrant additive, thus protecting the food included inside the package.

Also, another preferred embodiment of the invention may comprise an outer layer additional to the above, in order to facilitate coloring or decorative printing of the container, so that the total number of layers of the container in this case will be 5 instead of 3.

It is also a second object of the present invention a method of manufacturing the package described above, which preferably comprises an injection molding step.

While said injection method is not particularly limited, the co-injection method is especially preferred. In general, in said method, the polymers that constitute the layers of the preferably three-layer structure of the package are concentrically guided in the molten state, injected into a mold through an injector of known design and widely used commercially.

If an oxidizable polymer is used as an oxygen sequestering additive, either pure or diluted in a polymer matrix, said method of manufacturing the package may comprise an additional step of adding and mixing the oxidizable polymer with the main polymer component of any of the layers that are part of the container. Preferably, said mixing step will be intensively prepared prior to injection by known techniques capable of providing a suitable mixture of the molten polymer constituents. It will also be possible to carry out said mixing in the extrusion stage, prior to injection, of the molten mixture of the constituent components of the package.

The intensive pre-mixing of the components of the package, either base polymer, adhesive agent and sequestering additive and, optionally, catalyst and photoinitiator, constituting the outer layers of the container in the event that the sequestering additive is include in these layers, or oxygen barrier polymer, sequestering additive and, optionally, catalyst and photoinitiator, it can be carried out by kneading in a molten state by means of known equipment such as those provided with twin screw extruders (co-rotating) or not), not being in any case limited to this only possibility. Among the commercially known equipment especially suitable for carrying out said kneading stage, it is worth noting the continuous kneaders such as the CIM of Japan Steel Works Ltd. or the FCM of Farrell Corp. Among other possibilities, there may also be mentioned double extrusion equipment spindle like the ZSK of Coperion Werner & Pfleiderer GmbH & Co. and the TEX of Japan Steel Works, Ltd. In a particularly preferred embodiment, the equipment used will comprise a single screw extruder following intensive mixing or kneading equipment, which will perform the kneading, extrusion and pelletizing operations.

Preferably, the kneading or mixing operation of the constituent components of the package will be carried out at the lowest possible temperature in order to avoid the degradation of the polymeric components, thus protecting the ingredients through the use of an inert atmosphere. included in the feed hopper.

As for the catalyst, as well as, optionally, the photoinitiator, although said compounds can be added together during the inert mixing stage of the previous constituents, namely the base polymer and the oxygen sequestrant additive , they will be added, preferably, at the time of manufacturing the package, thus mixing with the rest of the components in the extrusion stage prior to the injection. Optionally, the catalyst-photoinitiator system may be added in the form of a concentrate previously prepared in a polymer matrix compatible with the layer to be mixed comprising the sequestering additive.

In the case of using an inorganic oxygen sequestrant additive, an especially preferred for incorporating the oxygen sequestering additive into the layer or layers of the container of the invention will comprise a first step of mixing the inorganic components, preferably inorganic components that they comprise iron in its composition, and a later stage of concentration of the previous mixture in a polymeric matrix, preferably, polyethylene or polypropylene or other polymers compatible with the constituent material of the layer to be mixed, preferably, by an intensive mixing process as already mentioned above. Upon completion of said step, the concentrate of inorganic oxygen sequestrant components in a polymer matrix will be incorporated and mixed with the main components of the container layers in the same manner as described above for the incorporation of the sequestering additive.

In a particular embodiment of the invention in which, as an oxygen sequestering additive, a composition comprising ascorbic acid is used, the method of manufacturing the package will be similar to the previous one, based on inorganic sequestering components or non-polymeric oxygen absorbers.

Finally, it will be a further object of the present invention, the use of the package described above for the preservation of perishable products, and more preferably, for the preservation of perishable foods. A series of examples and figures by way of illustration of the invention are set out below. Brief description of the figures

Figure 1 shows a particular embodiment of the invention corresponding to a multilayer container package consisting of 3 layers.

Figure 2 shows a second particular embodiment of the invention corresponding to a package comprising an additional inner layer in contact with the product to be packaged.

Next, the set of references collected in the previous figures is collected as a list:

(1) Polypropylene layer, adhesive agent and oxygen sequestering additive;

(2) Intermediate layer of barrier agent (preferably EVOH);

(3) Additional layer of polypropylene. Examples

The following are a series of tests, by way of example, which show the specificity and effectiveness of the package object of the invention:

Example 1

In this first example, a preform with three-wall structure was injected into a KORTEC co ^¬ injection unit, being molded into a SIDEL blow unit. For the central layer of the preform, the material used was the ethylene vinyl alcohol copolymer EVOH F of KURARAY Co. (32% molar C2), which was incorporated by pre-mixing of the additive oxygen sequestrant Shelfplus 02 from CIBA. The concentration of the oxygen sequestrant was 21.5 g / m2 in the final container. The thickness of the central layer in the final container was 33 microns. For the inner and outer layers of the preform, the material used as a base was the RANDOM IF 40 dg / min copolymer ISPLEN®PR290 P1M of REPSOL with a 4.5% ethylene molar content. This copolymer was previously modified by melt blending at 220-230 ° C with the POLYBOND 3200 adhesive polymer (PP-g-MA) having a degree of functionalization with maleic anhydride of 1% by weight. The final amount of maleic anhydride in the modified PP was 0.05% by weight. The total thickness of modified polypropylene in the final package was 1 mm.

The packages were subjected to a deformation and corrugated test to observe some possible phenomenon of delamination of the multilayer structure, nevertheless showing excellent resistance to delamination.

After closing the container with an airtight lid and subjecting said containers to a sterilization treatment at 120 ° C for 1 hour, the rate of transmission of oxygen into the interior was measured after 7 days, obtaining a permeability value against to oxygen below the minimum sensitivity level of an OXTRAN cell from MOCON Inc.

Example 2

In this second test, a preform was injected in the same manner as that carried out in the previous test of Example 1, the structure of the modified PP / modified EVOH / PP material being 500/30/500 microns thick. In this case, however, no oxygen sequestrant additive was added to the central layer, observing an oxygen permeability of 0.016 ce-mm / m2 · day · atm at room temperature and 0% RH, measured with an OXTRAN cell from MOCON Inc., similar to that observed in example 1 when measured immediately after the container was constructed.

Example 3

Finally, in this third test, a preform was injected in the same way as that carried out in the test of Example 1 but by direct injection of thin wall without subsequent blowing in a Husky machine equipped with a Kortec co-injection system with A structure of the modified PP material / EVOH / PP modified thicknesses 400/30/400 microns. In this case, an oxygen sequestrant additive was not used in the central layer, observing an oxygen permeability of 0.017 ce-mm / m2 · day · atm at room temperature and 0% RH, measured with an OXTRAN cell from MOCON Inc ., similar to that observed in example 1 when measured shortly after the container was constructed.

Claims

1. Container for perishable products characterized in that it comprises:

b) an intermediate layer of at least one oxygen barrier polymer where at least one of the above layers comprises, in turn, at least one oxygen sequestering additive.

2. Container according to claim 1, wherein the base polymer of the outer and inner layer of the package consists of a polyolefin selected from a group consisting of polyethylene; Polypropylene; and copolymers of ethylene and propylene, butene or other alpha-olefins; as well as any combination of the above.

3. Packaging according to one of the preceding claims, wherein the adhesive agent of the outer and inner layers is comprised between 1 and 25% by weight of the outer or inner layer of which it is a part.

4. Container according to one of the preceding claims, wherein the adhesive agent of the outer and inner layers is selected from a group consisting of polyethylene or polypropylene polymers containing graft polar groups; copolymers of ethylene and acrylic or methacrylic acid; copolymers of ethylene and acrylates or acetates; and derivatives of glycidyl methacrylate, or any combination of the foregoing.

5. Container according to claim 4 wherein, when the adhesive agent consists of polyethylene or polypropylene polymers containing graft polar groups, the percentage of said graft polar groups is less than 15% by weight with respect to the adhesive agent.

6. Container according to claim 4 wherein, when the adhesive agent consists of polypropylene with graft maleic anhydride, said maleic anhydride is in a proportion less than 5% by weight of the adhesive agent.

7. Container according to claim 4 wherein, when the adhesive agent consists of polypropylene with graft acrylic acid anhydride, said acrylic acid is in a proportion less than 7% by weight of the adhesive agent.

8. Container according to claim 4, wherein the adhesive agent consists of a styrene-ethylenebutylene-styrene copolymer with maleic anhydride.

9. Package according to any one of the preceding claims, wherein the oxygen barrier polymer of the central layer is selected from a group consisting of ethylene vinyl alcohol, vinylidene polychloride, nitrile polyacryl and liquid crystal polymers, or any combination of the above.

10. Packaging according to any one of the preceding claims, wherein the oxygen sequestering additive comprises from 1 to 15% by weight with respect to the layer containing it of at least one oxidizable organic polymer.

11. Container according to claim 10, wherein the oxidizable organic polymer is selected from a group consisting of copolyesters or copolyamides containing oligomeric segments derived from butadiene incorporating free olefinic unsaturated bonds in the copolymer main chain; copolyesters containing comonomers incorporating free olefinic unsaturated bonds on the side branch of the copolymer; ethylene copolymers containing chronomers incorporating free olefinic bonds on the side branch of the copolymer and polymers derived from cyclic diolefins, or any combination of the foregoing.

12. Container according to any one of claims 10 or 11, wherein said oxidizable organic polymer consists of a copolymer of a vinyl and diene aromatic monomer; a copolymer of ethylene propylene and diene; or a copolymer of ethylene and cyclic olefin.

13. Container according to any one of claims 10 to 12, wherein the oxidizable organic polymer is incorporated into the container in a polymer matrix selected from a group consisting of polypropylene, polyethylene, polyethylene terephthalate, ethylene acrylic acid, ethylene vinyl acetate and ethylene butyl acrylate, or any combination of the above.

14. Package according to any one of the preceding claims, wherein the catalyst is selected from a group consisting of a derivative of a transition metal.

15. Package according to claim 14, wherein the Catalyst consists of a cobalt salt derived from organic acids.

16. Package according to any one of the preceding claims, characterized in that it additionally comprises at least one photoinitiator selected from a group consisting of benzophenone, acenaphthenoquinone, diethoxyacetophenone, o-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone, or Any combination of the above.

17. Packaging according to any one of the preceding claims, characterized in that it additionally comprises at least one additive selected from a group consisting of dyes, fillers, nucleating additives, impact modifiers and stabilizing agents or any combination thereof.

18. Container according to claim 17, wherein the additive consists of an antioxidant comprised between 0.01% and 0.5% by total package weight.

19. Packaging according to any one of the preceding claims, characterized in that it comprises an additional inner layer of base polymer.

20. Container according to claim 19, characterized in turn comprising an additional outer layer for decorating the package.

21. Method for manufacturing the package according to any one of claims 1 to 20, characterized in that it is carried out by co-injection.

22. Method according to claim 21 wherein, when the Oxygen sequestrant additive comprises an oxidizable polymer, said oxidizable polymer is added at a previous stage of mixing with the main polymer of the layer of which it is a part.

23. A method according to claim 21 wherein, when the oxygen sequestering additive comprises a catalyst, said catalyst is added in an extrusion step prior to the injection of the container.

24. Method according to claim 21, wherein, when the oxygen sequestering additive is an inorganic additive, said additive is previously concentrated in a polymer matrix and subsequently incorporated and mixed with the other components of the constituent layers of the container.

25. Use of a container, according to any one of claims 1 to 20, for the preservation of perishable products.