EP4574709A1 - Capsule comprenant un corps de capsule en composite polysaccharide - Google Patents
Capsule comprenant un corps de capsule en composite polysaccharide Download PDFInfo
- Publication number
- EP4574709A1 EP4574709A1 EP23219294.8A EP23219294A EP4574709A1 EP 4574709 A1 EP4574709 A1 EP 4574709A1 EP 23219294 A EP23219294 A EP 23219294A EP 4574709 A1 EP4574709 A1 EP 4574709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capsule
- polysaccharide
- fibers
- matrix
- alginate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
- B65D85/8043—Packages adapted to allow liquid to pass through the contents
Definitions
- the invention relates to a capsule and a method for producing such a capsule according to the preambles of the independent claims.
- Prior art methods are known for the production of compostable capsules with an oxygen barrier.
- an existing capsule body such as a fiber-cast capsule, is coated with a composite material consisting of a biopolymer and a material with a certain oxygen barrier.
- paper capsules are known in the prior art and are described as environmentally friendly. For example, WO 2023/104711 a paper capsule is described.
- paper capsules have the disadvantage that, contrary to popular belief, they are not particularly compostable. Pure paper capsules have a problem with compostability because they contain an additional layer that acts as an oxygen barrier.
- EP3225566 A process is described in which a capsule body is coated with a cross-linked polysaccharide compound in a separate step.
- EP3736228 describes a method for producing a capsule body and an additional coating step with a polyvinyl alcohol.
- a first aspect of the invention relates to a preferably compostable capsule comprising a capsule body, wherein the capsule body is filled with a filling material, and a closure element.
- the capsule body comprises a polysaccharide composite.
- the polysaccharide composite comprises, and preferably consists of, a matrix material composed of at least one polysaccharide and at least one reinforcing material.
- the polysaccharide composite can have an oxygen transmission rate (OTR) of less than 30 cm 3 /m 2 *day*0.21 bar, preferably less than 20 cm 3 /m 2 *day*0.21 bar, and particularly preferably less than 10 cm 3 /m 2 * day*0.21 bar, at a layer thickness of 100 ⁇ m.
- OTR oxygen transmission rate
- An OTR of less than 5 cm 3 /m 2 *day*0.21 bar is most preferred.
- Compostable means that the material is at least home compostable according to the certification programs NF T 51-800:2015-11-14 (Plastics - Specifications for plastics suitable for home composting) and AS 5810:2010 (Biodegradable plastics - Biodegradable plastics suitable for home composting). This means decomposition (biodegradation) of at least 90% of the material with the release of CO2 within 12 months at a temperature of 25 ⁇ 5°C, and fragmentation (disintegration) of at least 90% of the material within 6 months at a temperature of 25 ⁇ 5°C.
- the capsule is characterized by its dimensional stability, which does not dissolve or change significantly during the extraction process. Furthermore, the composite serves as a barrier material, e.g., against aroma loss, migration of foreign aromas into the contents, and oxygen ingress.
- the polysaccharide composite preferably comprises a matrix material made of a cross-linked polysaccharide.
- Cross-linking can be covalent, ionic, and/or coordinate.
- Crosslinking via covalent bonds enables a highly durable composite.
- Crosslinking via covalent bonds is usually achieved by reacting at least one polysaccharide with a suitable crosslinker.
- a suitable crosslinker Particularly suitable are difunctional organic compounds, where the functional groups are selected, for example, from the group consisting of carboxylic acids, salts of carboxylic acids, activated carboxylic acids, amines, alcohols, aldehydes, and ketones.
- Activated carboxylic acids in this context are understood to mean carboxylic acid halides, active esters of carboxylic acids, anhydrides of carboxylic acids, or other reactive derivatives of carboxylic acids.
- Polysaccharides cross-linked by ionic and/or coordinative bonds are particularly easy to produce and do not impair the biodegradability of the polysaccharide used.
- Ionic and/or coordinative cross-linking can be achieved, for example, using polysaccharides containing anionic groups, such as carboxylate or sulfonate groups.
- anionic groups such as carboxylate or sulfonate groups.
- a coordinate bond refers to an interaction between an electron pair donor and an electron pair acceptor, such as can occur between free electron pairs of oxygen atoms in hydroxy groups and cations.
- the matrix material is selected from the group consisting of alginates, starches, modified starches, celluloses, chitin, chitosan, carrageenans, pectins, agar, xanthan, gellan, dextrans, galactomannan, glucomannan, guar gum, carubin, gum arabic, scleroglucan, pullulan, derivatives, or mixtures thereof.
- Alginate is preferred.
- the matrix material provides an oxygen barrier.
- Alginate in particular, exhibits a very good OTR for a natural substance when dried. The good barrier effect is presumably based on a dense network of OH groups, which allow polar gases such as water vapor to permeate very well, but not nonpolar gases such as oxygen.
- the reinforcing material may comprise fibers.
- the fibers are selected from the group consisting of: cellulose fibers; viscose fibers; PLA fibers; polyvinyl alcohol (PVOH) fibers; mineral fibers, preferably made of silicon dioxide; and plastic fibers, preferably aramid, polyethylene, and polyamide fibers. Compostable fibers are particularly preferred, and cellulose fibers are most preferred.
- the fibers give the polysaccharide composite additional stability.
- the fibers preferably have a length between 0.02 and 10.0 mm, preferably 0.04 and 5.0 mm and particularly preferably between 0.06 and 1.0 mm.
- the reinforcing material may additionally or alternatively comprise a powder made of at least one organic or at least one mineral component. This can serve as an additional filler and thus also provide at least some additional stability. Talc or other mineral powders, such as silicon dioxide, are conceivable here.
- the filling material is preferably a powder, a powder mixture, a pellet, a liquid or a liquid mixture.
- the filling material can be selected from the group: ground coffee, instant coffee, grain coffee, malt coffee, tea, tea granules, drinking chocolate, milk, plant-based drink, instant soup.
- Such a capsule according to the invention is characterized by particular dimensional stability. It should not break or disintegrate during transport or use by the user.
- Such a capsule particularly after filling with filling material, can absorb a maximum force in the breaking strength test of at least 25 N, in particular at least 50 N, and particularly preferably at least 100 N.
- the capsule is positioned between two parallel platens of a tensile-compression testing machine (e.g., one equipped with an Xforce P force transducer from Zwick/Roell).
- the capsule is centered on the lower platen in the extraction direction, or in the compression direction in the case of a rotationally symmetrical compact, e.g., spherical or cubic in shape.
- the plates have a diameter that is at least 50% larger than the maximum capsule diameter.
- the parallel plates are slowly moved together, and a force-displacement diagram is recorded. The load is increased until the shell is damaged. Simultaneously with this crack or fracture, a force drop is observed. When the measured force falls below the force drop threshold of 40% of the maximum force, the breaking strength test is terminated. The maximum measured force without damage to the shell is output as the breaking strength.
- the closure element can be a cover film made of an aroma-tight material, for example polyvinyl alcohol or corresponding copolymers.
- the closure element can also be made of a It can be a cross-linked polysaccharide or another readily biodegradable material. So-called bioplastics such as polylactic acid (PLA), polyhydroxyalkanoates (PHA), polyhydroxybutyric acid (PHB), and thermoplastic starch (TPS) are also possible.
- the capsule may consist of two half-shells.
- a first half-shell would form the capsule body, and a second half-shell would form the closure element.
- both the capsule body and the closure element can be manufactured identically.
- a polysaccharide composite is thus a composite material consisting of a matrix material composed of at least one polysaccharide and at least one reinforcing agent.
- the composite material may also contain other additives, such as plasticizers, fillers, pigments, dyes, retention aids, flocculants, wet strength agents, sizing agents, and/or polyvinyl alcohols or polyvinyl alcohol copolymers (PVOH).
- PVOH polyvinyl alcohols or polyvinyl alcohol copolymers
- high-molecular-weight PVOH can be used as an emulsifier and can thus provide an additional stabilizing effect.
- Low-molecular-weight PVOH can also be used due to its barrier properties.
- the molded body can be a membrane or a perforated film. Perforated sheets, screens, or semipermeable films, such as aluminum, are also possible.
- the molded body can also be designed in the form of a male mold as a counterpart to the capsule female mold. Male mold refers specifically to the negative mold of a capsule.
- the drying step is carried out on the shaped body and/or in the capsule matrix.
- crosslinking solutions made of difunctional organic compounds are also suitable, whereby the functional groups are selected, for example, from the group consisting of carboxylic acids, salts of carboxylic acids, activated carboxylic acids, amines, alcohols, aldehydes and ketones.
- the wire mesh sleeve preferably has a mesh size of 0.01 to 0.3 mm, preferably 0.02 to 0.21 mm, particularly preferably 0.04 to 0.08 mm and most preferably 0.05 to 0.075 mm.
- a 1.00% alginate solution was prepared that additionally contained 5.00% cellulose.
- the solution also contained 7.00% sorbitol.
- a wire mesh sleeve with a mesh size of 0.063 mm and a wire thickness of 0.050 mm was used as the capsule matrix and wire mesh sleeve.
- the wire mesh sleeve and the alginate-fiber mixture were temporarily pressed together with two clothespins and then dried for 18 min at 75°C in a Binder oven (ventilation and dehumidification (5% RH)).
- the wire mesh sleeves were placed in a desiccator overnight. The next day, the alginate-fiber capsule body could be demolded by careful rotating movements.
- a wire mesh sleeve in the form of a male mold was used as the mold body, and a preheated metal mold with steam holes was used as the capsule matrix.
- the wire mesh sleeve had a mesh size of 0.063 mm and a wire thickness of 0.050 mm.
- An aluminum pressing tool in the shape of the capsule's outer contour with fine steam holes was provided.
- Approximately 2 g were applied to the inside of the curved wire mesh sleeve. Alternatively, it can be sucked in using negative pressure in an industrial process. Then, the capsule matrix was inserted by hand and pressed down. Pressure and The alginate-fiber mixture was distributed between the wire mesh sleeve and the capsule matrix using rotating movements. The thickness of the alginate-fiber mixture layer can be varied by varying the amount of alginate-fiber mixture and the applied pressure. Excess alginate-fiber mixture can be removed at the exit points at the edge between the wire mesh sleeve and the capsule matrix.
- the wire mesh sleeve is then removed, and the resulting alginate fiber mixture is crosslinked on the capsule matrix with a 10% calcium chloride dihydrate mixture and then rinsed with softened water.
- the preheated aluminum press tool with steam vents is then attached to achieve rapid initial drying without deforming the capsule body.
- the final drying step was completed overnight in a desiccator. The next day, the alginate-fiber capsule body could be demolded by gently rotating it.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Preparation And Processing Of Foods (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23219294.8A EP4574709A1 (fr) | 2023-12-21 | 2023-12-21 | Capsule comprenant un corps de capsule en composite polysaccharide |
| PCT/EP2024/087890 WO2025133113A1 (fr) | 2023-12-21 | 2024-12-20 | Capsule ayant un corps de capsule en composite polysaccharide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23219294.8A EP4574709A1 (fr) | 2023-12-21 | 2023-12-21 | Capsule comprenant un corps de capsule en composite polysaccharide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4574709A1 true EP4574709A1 (fr) | 2025-06-25 |
Family
ID=89430398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23219294.8A Pending EP4574709A1 (fr) | 2023-12-21 | 2023-12-21 | Capsule comprenant un corps de capsule en composite polysaccharide |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4574709A1 (fr) |
| WO (1) | WO2025133113A1 (fr) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170008694A1 (en) * | 2013-12-03 | 2017-01-12 | Biserkon Holdings Ltd. | Capsule and device for preparing beverages and method for producing the capsule |
| EP3225566A1 (fr) | 2016-03-31 | 2017-10-04 | Axel Nickel | Capsule contenant de la poudre pour boisson, en particulier destinée a la préparation de café |
| DE102016110089A1 (de) * | 2016-06-01 | 2017-12-07 | Christine Konert | Kapsel für die portionsweise Zubereitung eines Getränks |
| EP3736228A1 (fr) | 2019-05-07 | 2020-11-11 | Swiss Coffee Innovation AG | Matériau, tel que capsule contenant de la poudre pour boisson, en particulier destinée à la préparation de café |
| WO2023104711A1 (fr) | 2021-12-08 | 2023-06-15 | Société des Produits Nestlé S.A. | Capsule pour la préparation d'une boisson et procédé de fabrication de ladite capsule |
| CN116761852A (zh) * | 2020-12-09 | 2023-09-15 | 瓦登加工私人有限公司 | 阻隔系统 |
-
2023
- 2023-12-21 EP EP23219294.8A patent/EP4574709A1/fr active Pending
-
2024
- 2024-12-20 WO PCT/EP2024/087890 patent/WO2025133113A1/fr active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170008694A1 (en) * | 2013-12-03 | 2017-01-12 | Biserkon Holdings Ltd. | Capsule and device for preparing beverages and method for producing the capsule |
| EP3225566A1 (fr) | 2016-03-31 | 2017-10-04 | Axel Nickel | Capsule contenant de la poudre pour boisson, en particulier destinée a la préparation de café |
| DE102016110089A1 (de) * | 2016-06-01 | 2017-12-07 | Christine Konert | Kapsel für die portionsweise Zubereitung eines Getränks |
| EP3736228A1 (fr) | 2019-05-07 | 2020-11-11 | Swiss Coffee Innovation AG | Matériau, tel que capsule contenant de la poudre pour boisson, en particulier destinée à la préparation de café |
| CN116761852A (zh) * | 2020-12-09 | 2023-09-15 | 瓦登加工私人有限公司 | 阻隔系统 |
| WO2023104711A1 (fr) | 2021-12-08 | 2023-06-15 | Société des Produits Nestlé S.A. | Capsule pour la préparation d'une boisson et procédé de fabrication de ladite capsule |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2025133113A1 (fr) | 2025-06-26 |
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