Single-serving capsule system for receiving coffee powder and for preparing a coffee beverage, and method of manufacturing such a single-serving capsule system

Abstract

The invention relates to a portion capsule system (2) for holding coffee powder (4) and for preparing a coffee beverage, comprising at least one, in particular pot-shaped, container (6), at least one lid element (8) sealing the container (6) in a gas- and / or aroma-tight manner, and at least one filter element (10) arranged in a cavity (12) of the container (6) or adjacent to the cavity (12), wherein the container (6) and the lid element (8) are completely sealed gas- and aroma-tight with a film-forming, washable CO2 and O2 barrier (14) formed from a whey protein whey seal (16), and wherein the container (6), the lid element (8), and the filter element (10) are each made of a taste-neutral and physiologically harmless plastic, characterized in thatthat the tasteless and physiologically harmless plastic is pure and recyclable and that at least the container (6) and lid element (8) are made of the same pure recyclable plastic.

Description

[0001] The invention relates to a portion capsule system for holding coffee powder and for preparing a coffee beverage, with at least one, in particular pot-shaped, container, with at least one lid element that closes the container in a gas-tight and / or aroma-tight manner, and with at least one filter element that is arranged in a cavity of the container or adjacent to the cavity, wherein the container and the lid element are completely sealed in a gas-tight and aroma-tight manner with a film-forming, washable CO 2 and O 2 barrier that is formed from a whey protein WHEY seal, and wherein the container, the lid element and the filter element are each formed from a taste-neutral and physiologically acceptable plastic, as well as a method for producing such a portion capsule system.

[0002] Coffee portion capsule systems must be gas- and aroma-tight to prevent the CO2 (carbon dioxide) evaporating from the ground coffee from diffusing out of the capsule and the atmospheric oxygen (O2) surrounding the capsule from diffusing into the capsule. This prevents aroma loss and oxidative deterioration of the ground coffee.

[0003] To achieve gas and aroma resistance for plastic containers, processes are known from the state of the art in which the finished containers, such as PET beverage bottles or flat films, are provided with a SiOx barrier (silicon oxide).

[0004] However, for the application of the known processes for cup-shaped portion capsules for coffee powder made from plastic films using the deep-drawing or blow-molding process or the plastic injection-molding process, these complex processes are unsuitable for process-technical reasons, and plastics coated with SiOx are only partially recyclable.

[0005] In order to make the portion capsules for coffee powder gas- and aroma-tight, known portion capsules comprise containers that are deep-drawn from an aluminum foil and are sealed gas- and aroma-tight with a lid element that is formed from an aluminum foil.

[0006] However, when using aluminum, it can never be completely ruled out that the acids released from the coffee during the brewing process could form a potentially physiologically harmful reaction with the aluminum. Furthermore, recycling aluminum is uneconomical.

[0007] Furthermore, portion capsules are known from the prior art, whose container and lid element are made of petroleum-based, physiologically safe plastics that do not affect the flavor of the coffee inside. Such containers, which are formed using deep-drawing, blow molding, or injection molding processes, as well as the lid elements that seal the container gas-tight, are formed from a multilayer plastic film to achieve gas-tightness. This film consists of various layers of plastics, e.g., polyethylene terephthalate (PET), polyamide (PA), ethylene vinyl alcohol (EVOH), acrylonitrile (PAN), polyvinylidene chloride (PVD), and polyvinyl chloride (PVC), which are inseparably welded together.

[0008] These multilayer films are sandwiched between two, only partially gas-tight films, a third gas-tight film. These multilayer plastic films ensure the gas-tightness of the portion capsule for a reasonably long period of time.

[0009] The disadvantage of these multilayer plastic capsules is that, due to the use of different plastics that are inseparably welded together, they cannot be recycled separately, creating disposal problems for the used capsules. As a result, the majority of the plastic capsules used annually end up in a landfill and are incinerated after use. When finally disposed of in a landfill, the multilayer plastic capsules result in a plastic component that pollutes the environment. The resulting waste volume currently amounts to several tens of thousands of tons annually.

[0010] In order to reduce the consumption of petrol-based resources, it is known from DE 10 2018 120 783 A1 to provide portion capsules in which the capsule body and the lid element are made of renewable, organic thermoplastic biopolymers that are biodegradable or compostable, tasteless and physiologically harmless and preferably belong to the group of polysaccharides, but can also be made of other materials that meet the aforementioned conditions and the standard EN 13432 for compostable biopolymers.

[0011] However, these materials also waste resources and are not suitable for recycling.

[0012] The object of an embodiment of the invention is to propose a portion capsule system as mentioned above, in which reusability or the possibility of recycling is improved.

[0013] This task is solved in the case of a portion capsule system as mentioned above in that the taste-neutral and physiologically harmless plastic is single-type and recyclable and that at least the container and lid element are made of the same single-type recyclable plastic.

[0014] Because the tasteless and physiologically safe plastic is single-material, and at least the container and lid are made of the same single-material, recyclable plastic, the portion capsule can be recycled after use. Separating and splitting the individual components is not necessary, as at least the container and lid are made of the same recyclable plastic, thus shortening and simplifying the recycling process.

[0015] The whey protein WHEY seal is tasteless, physiologically harmless and washable.

[0016] In principle, it is conceivable that the filter element is made of a different plastic than the container and lid. In this case, the filter element can be easily removed from the portion capsule system after use by rinsing the container.

[0017] The recycling of the portion capsule system can be further improved if the container, lid element and filter element are made of the same pure, recyclable plastic.

[0018] In this case, there is no need to separate the filter element, which increases the number of recyclable parts and simplifies the recycling process because all components are made of the same pure, recyclable plastic.

[0019] The lid element can be formed from a polymer monofilm and attached to the container in a detachable manner, in particular in a force-fitting and / or form-fitting manner and in a gas-tight manner. Furthermore, the lid element can be attached to the container in a non-detachable manner, in particular in a force-fitting, form-fitting, and / or material-fitting manner. In this case, the lid element can be welded or glued to the container.

[0020] The filter element can be arranged anywhere within the cavity or adjacent to the cavity. In some embodiments, it is preferred if the filter element is arranged in the area of ​​the beverage outlet.

[0021] It proves to be advantageous if the single-material plastic from which the container, lid element and / or filter element are formed comprises at least one single-material thermoplastic polymer that is fully recyclable.

[0022] The thermoplastic polymer can be food-safe, tasteless and / or physiologically harmless and preferably belongs to the group of thermoplastic polymers.

[0023] In such a case, it proves to be advantageous if the single-variety polymer preferably belongs to the group of thermoplastic polymers and comprises a polyethylene terephthalate (PET), polyamide (PA), ethylene vinyl alcohol (EVOH), acrylonitrile (PAN), polyvinylidene chloride (PvdC), a high-density polyethylene (PE-HD) or a polypropylene (PP) or comprises at least one further polymer which is single-variety, recyclable, tasteless and physiologically harmless.

[0024] Alternatively or in addition to the latter embodiment, it proves to be advantageous if the single-variety plastic comprises a recyclable plastic from the group of biopolymers.

[0025] This allows for simple and cost-effective production of the container, lid element, and / or filter element. Furthermore, the use of a single-grade thermoplastic polymer for the container, lid element, and / or filter element ensures complete, single-grade recyclability, while also being food-safe, tasteless, and physiologically safe.

[0026] In embodiments of the portion capsule system, it is provided that the container is deep-drawn from a thermoplastic polymer monofilm, formed by blow molding or by a plastic injection molding process and is in particular dimensionally stable, and / or that the lid element is formed from a flexible polymer monofilm.

[0027] This allows the container to be easily shaped into any geometric form to fit into a coffee machine with a corresponding brewing chamber system.

[0028] In order to avoid the risk of coffee powder oxidizing, it is advantageous if the whey protein WHEY seal is tasteless, physiologically harmless and washable and / or if the whey protein WHEY seal is arranged on the inner, outer or inner and outer surface of the container and the cover element, completely or at least almost completely covering them and sealing them gas- and aroma-tight, and forms a protection against CO2 diffusing out of the capsule and O2 diffusing into the capsule.

[0029] The whey protein seal can be applied exclusively to the inner surface or exclusively to the outer surface of the container and lid element before filling the container with coffee powder. Furthermore, the whey protein seal can be applied to both the inner and outer surfaces of the container and lid element before filling the container with coffee powder.

[0030] To prevent aroma loss, the coffee powder is poured into the container of the portion capsule system immediately after the roasting and grinding process, and the container is sealed gas-tight with the lid. The CO2 released from the freshly ground coffee powder then creates excess pressure in the capsule body. If the capsule body is not gas-tight, the CO2 can diffuse out of the capsule body, allowing oxygen to diffuse into the capsule body.

[0031] In order to avoid the risk of coffee powder oxidising, it is advantageous to provide the container and lid element with a CO2 and O2 barrier made from a whey protein WHEY seal, as this allows an overpressure in the capsule to be maintained for as long as possible to prevent oxygen from diffusing in.

[0032] It proves to be advantageous if the CO2 and O2 barrier, which is formed from a whey protein WHEY seal, is tasteless, physiologically harmless and washable, and / or is arranged on the outer and / or inner surface of the container and the cover element, completely or at least almost completely covering them and sealing them gas- and aroma-tight, and forms a protection against CO2 diffusing out of the capsule and O2 diffusing into the capsule.

[0033] It proves to be advantageous if the whey protein WHEY sealant comprises an aqueous solution to which an adhesion promoter from the group of sugar alcohols, in particular sorbitol, is added.

[0034] The mixing ratio of a whey protein solution forming the whey protein WHEY seal can, for example, be 500 ml of water to 50 g of whey protein and 5 g of adhesion promoter.

[0035] The features mentioned above ensure a gas-tight, film-forming, pore-free seal of the portion capsule system.

[0036] The filter element can, in principle, be arranged anywhere. It is advantageous if the container has a brewing water inlet side and a beverage outlet side, with at least one of the at least one filter element being arranged in the area of ​​the beverage outlet side.

[0037] In a further development of the latter embodiment, it is preferred that the container comprises a closed container base on the side opposite the lid element and an opening on the side facing the lid element, which opening can be closed entirely or at least in sections by the lid element, wherein the container base comprises the brewing water inlet side and the lid element closing the opening comprises the beverage outlet side or wherein the container base comprises the beverage outlet side and the lid element closing the opening comprises the brewing water inlet side.

[0038] This allows the lid element to form a beverage outlet if the closed container base opposite the lid element forms a brewing water inlet. Conversely, the closed container base opposite the lid element can form a beverage outlet if the lid element closing the opening forms a brewing water inlet. This makes the portion capsule system adaptable to various devices on the market.

[0039] Furthermore, it proves to be advantageous if at least one of the at least one filter element is arranged on the side facing the cover element in the cavity of the container and adjacent to the cover element and / or if at least one of the at least one filter element is arranged on the side facing away from the cover element in the cavity of the container, in particular adjacent to the container bottom of the container, or if at least one of the at least one filter element is arranged on the outside of the container facing away from the cover element adjacent to the container and / or if at least one of the at least one filter element is arranged on the outside of the cover element facing away from the container adjacent to the cover element container.

[0040] The filter element can be arranged in the cavity of the container or on a side facing away from the cavity on the lid element or on the container bottom.

[0041] Furthermore, the container base and the filter element and / or the cover element and the filter element can form a single, one-piece component. In this case, the container base and / or the cover element are designed as a filter element.

[0042] It proves to be advantageous if the cover element is fixed to the container in a detachable manner, in particular in a force-fitting and / or form-fitting manner, or in a non-detachable manner, in particular in a force-fitting, form-fitting and / or material-fitting manner, and / or if at least one of the at least one filter element is fixed to the container or to the cover element in a detachable manner, in particular in a force-fitting and / or form-fitting manner, or in a non-detachable manner, in particular in a force-fitting, form-fitting and / or material-fitting manner.

[0043] In order to facilitate recycling of the portion capsule system, an embodiment of the portion capsule system comprises at least one user- and / or machine-readable display element which is arranged on the lid element and / or on the container and by means of which a material, in particular a material identification code, can be detected by the user and / or the machine.

[0044] This makes it easy for a user and / or a machine to determine the material composition, thus ensuring easy classification during recycling.

[0045] In such a case, it is advantageous if the user- and / or machine-readable display element meets at least the requirement of Article 7(1) of EU Directive (EU) 2019 / 904.

[0046] Furthermore, the object is achieved by a method for producing a portion capsule system with at least one of the aforementioned features, which comprises at least the following steps: a. molding the container from a single-material plastic using a deep-drawing, blow-molding or plastic injection-molding process, molding the lid element from the same single-material plastic and providing the filter element, which is in particular made from the same single-material plastic as the container and lid element; b. providing a film-forming, washable CO2 and O2 barrier formed from a whey protein WHEY seal on the outer surface and / or the inner surface of the container and the lid element; c. filling the container with coffee powder and inserting the filter element into the container or inserting the filter element into the container and filling the container with coffee powder; and d. closing the container with the lid element; or a. Forming the container from a single-variety plastic using a deep-drawing, blow-molding or plastic injection-molding process, forming the lid element from the same single-variety plastic and providing the filter element, which is in particular made from the same single-variety plastic as the container and lid element; b. Filling the container with coffee powder and introducing the filter element into the container or introducing the filter element into the container and filling the container with coffee powder; c. Closing the container with the lid element; and d. Providing a film-forming, washable CO2 and O2 barrier formed from a whey protein WHEY seal on the outer surface of the container and the lid element.

[0047] The individual process steps can be performed in any order, provided this is technically feasible. For example, step c. can be performed before step b. if the whey protein seal is applied to the outer surface of the container and lid element.

[0048] Furthermore, it proves to be advantageous if a washable CO 2 and O 2 barrier, which is formed from a whey protein WHEY seal, is applied by means of a spraying or dipping process to the outside and / or the inside of the container and the lid element and a drying of the washable applied CO 2 and O 2 barrier.

[0049] The advantages of the portion capsule system according to the invention are briefly discussed below: Because, in contrast to the prior art, both the container and the lid element, and preferably also the filter element, are made entirely of an identical, single-variety, recyclable polymer and comprise a washable CO2 and O2 barrier formed from a whey protein WHEY seal, after coffee preparation, the coffee residues can be removed from the container in a washing process, and the WHEY seal can be washed off at the same time. The container, lid element, and filter can then be recycled in a single-variety manner. This proves to be sustainable in terms of environmental friendliness, resource conservation, and energy savings.

[0050] To prepare a beverage, particularly a coffee beverage such as espresso, the respective portion capsule is inserted into an open brewing chamber of a beverage preparation device. The brewing chamber consists of a first, stationary chamber section and a second, horizontally or vertically movable chamber section relative to the first, stationary chamber section. Depending on the design of the brewing chamber, opening means are provided in the first or second chamber section for opening the portion capsule to supply the portion capsule with brewing water. The opposite side of the portion capsule forms a beverage outlet.

[0051] For the brewing process and to extract the portion capsule, the brewing chamber is closed. The openings for the brewing water supply and the beverage outlet penetrate the portion capsule.

[0052] The brewing water is then pressed into the portion capsule through the opening pierced by the opening means for the brewing water inlet and the resulting coffee beverage flows through the filter element through the opening in the portion capsule pierced by the opening means for the beverage outlet.

[0053] The portion capsule is then removed and can be fed into the recycling process.

[0054] Further features, details and advantages of the invention emerge from the appended patent claims, from the drawings and the following description of two preferred embodiments of the portion capsule system and one of the method.

[0055] The drawing shows: Figure 1: A sectional view of a first embodiment of the portion capsule system; Figure 2: A sectional view of a second embodiment of the portion capsule system; Figure 3: A schematic flow diagram of a method according to the invention.

[0056] The Figures 1 and 2 Each of the drawings shows different exemplary embodiments of a portion capsule system, designated overall by the reference numeral 2, for holding coffee powder 4 and for preparing a coffee beverage. In both illustrated exemplary embodiments of the portion capsule system 2, the system comprises a pot-shaped container 6 and at least one lid element 8 that seals the container 6 in a gas-tight and / or aroma-tight manner.

[0057] In addition, the portion capsule systems 2 shown each comprise a filter element 10 which is arranged in a cavity 12 of the container 6.

[0058] In the Figures 1 and 2In the embodiments of the portion capsule system 2 shown, both the container 6, the lid element 8 and the filter element 10 are made of a taste-neutral and physiologically harmless plastic, which is also single-variety and recyclable, wherein both the container 6 and the lid element 8 and the filter element 10 are made of the same single-variety, recyclable plastic.

[0059] Container 6 and lid element 8 are sealed gas- and aroma-tight by a film-forming, washable CO 2 and O 2 barrier 14, which is formed from a whey protein WHEY seal 16.

[0060] The container 6 comprises a container base 18 on the side facing away from the lid element 8. On the side of the lid element 8, the container 6 comprises an opening 20 through which the cavity 12 of the container 6 is accessible from the outside when the lid element 8 is not yet arranged on the container 6. The lid element 8 closes the cavity 12 of the container 6 in the region of the opening 20.

[0061] Figure 1 shows a first embodiment of the portion capsule system 2, in which the container bottom 18 forms a brewing water inlet side E. The lid element 8 comprises in the Figure 1 shown embodiment a beverage outlet side A. The filter element 10 is in the Figure 1 shown embodiment arranged adjacent to the cover element 8.

[0062] In the embodiment according to Figure 1the CO2 and O2 barrier 14 is arranged on the inner surfaces of the container 6 and the lid element 8 and on the outer surfaces of the container 6 and the lid element 8.

[0063] Figure 2 shows a second embodiment of the portion capsule system 2. In this case, the filter element 10 forms a brewing water inlet side E and the container base 18 forms a beverage outlet side A. The filter element 10 is in the Figure 2 The embodiment shown is arranged adjacent to the container bottom 18.

[0064] In the embodiment according to Figure 2 the CO2 and O2 barrier 14 is arranged only on the outer surfaces of the container 6 and the lid element 8.

[0065] Figure 3 shows a schematic flow diagram of a method for producing a portion capsule system 2 according to embodiments according to Figures 1 and 2 . With reference to and assistance from Figures 1 and 2The method is described below in the exemplary embodiments illustrated: In a first step 100, the container 6 is formed from a single-grade plastic using a deep-drawing, blow-molding, or plastic injection-molding process. The lid element 8 is formed from the same single-grade plastic. Furthermore, the filter element 10 is provided. The filter element 10 can comprise the same single-grade plastic as the container 6 and the lid element 8.

[0066] In a subsequent step 101, a film-forming, washable CO 2 and O 2 barrier 14 formed from the whey protein WHEY sealant 16 is provided and dried on the outer surface and / or on the inner surface of the container 6 and / or the lid element 8.

[0067] To produce the portion capsule system 2 according to Figure 1, in a subsequent step 102 the container 6 is filled with coffee powder 4 and then the filter element 10 is inserted.

[0068] For providing a portion capsule system 2 according to Figure 2 In step 102, the filter element 10 is inserted into the container 6 and then the container 6 is filled with coffee powder 4.

[0069] In both embodiments, the container 6 is closed with the lid element 8 in a final step 103.

[0070] However, step 101 can also be carried out after step 102 if the film-forming, washable CO 2 and O 2 barrier 14 formed from the whey protein WHEY seal 16 is provided on the outer surface of the container 6 and / or the lid element 8.

[0071] As an alternative to the previous exemplary embodiment of the method, in a first step 100, the container 6 can be formed from a single-grade plastic using a deep-drawing, blow-molding, or plastic injection-molding process. The lid element 8 is formed from the same single-grade plastic. Furthermore, the filter element 10 is provided. The filter element 10 can comprise the same single-grade plastic as the container 6 and the lid element 8.

[0072] In a second step 102, the filter element 10 is first inserted and the container 6 is filled with coffee powder 4.

[0073] In a third step 103, the container 6 is closed with the lid element 8.

[0074] In a final step 104, a film-forming, washable CO2 and O2 barrier 14 formed from the whey protein WHEY sealant 16 is provided and dried on the outer surfaces of the container 6 and the lid member 8.

[0075] The features of the invention disclosed in the above description, in the claims and in the drawings may be essential, both individually and in any combination, in the realization of the invention in its various embodiments within the scope of the following claims. List of reference symbols

[0076] 2 Portion capsule system 4 Coffee powder 6 Container 8 Lid element 10 Filter element 12 Cavity 14 CO 2 and O 2 barrier 16 Whey protein WHEY seal 18 Container base 20 Opening EBrew water inlet side AGeatment outlet side 100-103Procedure steps

Claims

1. Portion capsule system (2) for holding coffee powder (4) and for preparing a coffee beverage, comprising at least one, in particular pot-shaped, container (6), at least one lid element (8) that seals the container (6) in a gas-tight and / or aroma-tight manner, and at least one filter element (10) that is arranged in a cavity (12) of the container (6) or adjacent to the cavity (12), wherein the container (6) and the lid element (8) are completely sealed in a gas-tight and aroma-tight manner with a film-forming, washable CO2 and O2 barrier (14) formed from a whey protein WHEY seal (16), and wherein the container (6), the lid element (8), and the filter element (10) are each formed from a taste-neutral and physiologically harmless plastic, characterized in thatthe tasteless and physiologically harmless plastic is pure and recyclable and that at least the container (6) and lid element (8) are made of the same pure recyclable plastic.

2. Portion capsule system (2) according to claim 1, characterized in that Container (6), lid element (8) and filter element (10) are made of the same pure recyclable plastic.

3. Portion capsule system (2) according to claim 1 or 2, characterized in that the single-variety plastic from which the container (6), lid element (8) and / or filter element (10) are formed comprises at least one single-variety thermoplastic polymer which is fully recyclable.

4. Portion capsule system (2) according to claim 3, characterized in thatthe single-variety polymer preferably belongs to the group of thermoplastic polymers and comprises a polyethylene terephthalate (PET), polyamide (PA), ethylene vinyl alcohol (EVOH), acrylonitrile (PAN), polyvinylidene chloride (PvdC), a high-density polyethylene (PE-HD) or a polypropylene (PP) or comprises at least one further polymer which is single-variety, recyclable, tasteless and physiologically harmless.

5. Portion capsule system (2) according to claim 3 or 4, characterized in that the pure plastic includes a recyclable plastic from the group of biopolymers.

6. Portion capsule system (2) according to one of the preceding claims, characterized in that the container (6) is deep-drawn from a thermoplastic polymer monofilm, formed by blow molding or by a plastic injection molding process and is in particular dimensionally stable, and / or that the lid element (8) is formed from a flexible polymer monofilm.

7. Portion capsule system (2) according to one of the preceding claims, characterized in that the whey protein WHEY seal (16) is tasteless, physiologically harmless and washable and / or that the whey protein WHEY seal (16) is arranged on the inner, outer or inner and outer surface of the container (6) and the cover element (8), completely or at least almost completely covering them and sealing them gas- and aroma-tight, and forms a protection against CO2 diffusing out of the capsule and O2 diffusing into the capsule.

8. Portion capsule system (2) according to one of the preceding claims, characterized in that the whey protein WHEY seal (16) comprises an aqueous solution to which an adhesion promoter from the group of sugar alcohols, in particular sorbitol, is added.

9. Portion capsule system (2) according to one of the preceding claims, characterized in thatthe container (6) has a brewing water inlet side (E) and a beverage outlet side (A), wherein at least one of the at least one filter element (10) is arranged in the region of the beverage outlet side (A).

10. Portion capsule system (2) according to claim 9, characterized in that the container (6) comprises a closed container base (18) on the side opposite the cover element (8) and an opening (20) on the side facing the cover element (8), which opening can be closed entirely or at least in sections by the cover element (8), wherein the container base (18) comprises the brewing water inlet side (E) and the cover element (8) closing the opening (20) comprises the beverage outlet side (A) or wherein the container base (18) comprises the beverage outlet side (A) and the cover element (8) closing the opening (20) comprises the brewing water inlet side (E).

11. Portion capsule system (2) according to claim 10, characterized in thatat least one of the at least one filter element (10) is arranged on the side facing the cover element (8) in the cavity (12) of the container (6) and adjacent to the cover element (8) and / or that at least one of the at least one filter element (10) is arranged on the side facing away from the cover element (8) in the cavity (12) of the container (6), in particular adjacent to the container bottom (18) of the container (6), or that at least one of the at least one filter element (10) is arranged on the outside of the container (6) facing away from the cover element (8) adjacent to the container (6) and / or that at least one of the at least one filter element (10) is arranged on the outside of the cover element (8) facing away from the container (6) adjacent to the cover element (8) of the container (6) 12. Portion capsule system (2) according to one of the preceding claims, characterized in thatthe container base (18) and the filter element (10) and / or the cover element (8) and the filter element (10) form a common, one-piece component.

13. Portion capsule system (2) according to one of the preceding claims, characterized in that the cover element (8) is fixed to the container (6) in a detachable manner, in particular in a force-fitting and / or form-fitting manner, or in a non-detachable manner, in particular in a force-fitting, form-fitting and / or material-fitting manner, and / or that at least one of the at least one filter element (10) is fixed to the container (6) or to the cover element (8) in a detachable manner, in particular in a force-fitting and / or form-fitting manner, or in a non-detachable manner, in particular in a force-fitting, form-fitting and / or material-fitting manner.

14. Portion capsule system (2) according to one of the preceding claims, characterized byat least one user- and / or machine-readable display element which is arranged on the lid element (8) and / or on the container (6) and by means of which a material, in particular a material identification code, can be detected by the user and / or machine.

15. A method for producing a portion capsule system (2) according to one of claims 1 to 14, comprising at least the following steps: a. molding the container (6) from a single-grade plastic using a deep-drawing, blow-molding or plastic injection-molding process, molding the lid element (8) from the same single-grade plastic and providing the filter element (10), which is formed in particular from the same single-grade plastic as the container (6) and lid element (8); b. providing a film-forming, washable CO2 and O2 barrier formed from a whey protein WHEY seal (16) on the outer surface and / or the inner surface of the container (6) and the lid element (8); c. Filling the container (6) with coffee powder (4) and inserting the filter element (10) into the container (6) or inserting the filter element (10) into the container (6) and filling the container (6) with coffee powder (4); and d.Closing the container (6) with the lid element (8); or a. molding the container (6) from a single-grade plastic using a deep-drawing, blow-molding, or plastic injection-molding process, molding the lid element (8) from the same single-grade plastic, and providing the filter element (10), which is in particular made from the same single-grade plastic as the container (6) and lid element (8); b. filling the container (6) with coffee powder (4) and inserting the filter element (10) into the container (6), or inserting the filter element (10) into the container (6) and filling the container (6) with coffee powder (4); c. closing the container (6) with the lid element (8); and d. providing a film-forming, washable CO2 and O2 barrier, formed from a whey protein WHEY seal (16), on the outer surface of the container (6) and the lid element (8).

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