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
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
  • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
  • B29C45/14811—Multilayered articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/16—Making multilayered or multicoloured articles
  • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
  • B29C45/1643—Making multilayered or multicoloured articles having a "sandwich" structure from at least three different materials or with at least four layers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
  • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
  • B29K2067/04—Polyesters derived from hydroxycarboxylic acids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B7/00—Closing containers or receptacles after filling
  • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
  • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
  • B65B7/2842—Securing closures on containers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
  • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Definitions

• the present invention relates to the field of closed biodegradable and compostable capsules, by industrial composting and / or by domestic composting, for single use, containing at least one substance in powder form for the preparation of a drink, for example coffee. , intended to be extracted under pressure.
• the pre-dosed and prepackaged portions of coffee are widely used in making espresso-type coffees because they are simple and easy to use.
• capsules There are generally two types of capsules on the market, rigid capsules typically consisting of a container and a seal, and flexible capsules containing filter layers.
• the present invention relates to the first category of capsule.
• Rigid capsules of the Nespresso® type are widely used in Europe. These capsules comprise a body or container and a cap which are traditionally made essentially of aluminum.
• capsules there are also capsules, the lid and body of which are made of plastics.
• the capsules currently on the market do not meet the three requirements, (i) biodegradable under industrial composting conditions, (ii) biodegradable under domestic composting conditions and (iii) barrier function to oxygen and water vapor .
• the present invention relates to a closed capsule 1, intended to be extracted under pressure, containing a substance in powder form for the preparation of a drink, said capsule comprising an enclosure 2 with a bottom 3 and a side wall 4 having a circular rim 5, and a cover (6) welded to the periphery of the rim of the enclosure, characterized in that the bottom, the side wall and the circular rim are formed by injection molding of at least one formulation comprising:
• the formulation comprises from 50 to 99.9% by weight, preferably from 75 to 99.5% by weight, advantageously from 90 to 99% by weight, of the polymer (s) chosen (s) from polyhydroxybutyrate, such as polyhydroxybutyrate / hydroxyvalerate and mixtures thereof, relative to the total weight of the formulation.
• the formulation comprises from 0.1 to 50% by weight, preferably from 0.5 to 25% by weight, advantageously from 1 to 10% by weight, of ingredient (s) chosen from silicates, vitamin E, plasticized animal or plant proteins, or mixtures thereof, relative to the total weight of the formulation.
• ingredient (s) chosen from silicates, vitamin E, plasticized animal or plant proteins, or mixtures thereof, relative to the total weight of the formulation.
• the formulation further comprises
• At least one polyvinyl alcohol preferably in an amount ranging from 1 to 30% by weight, preferably from 2 to 20% by weight, advantageously from 5 to 10% by weight, relative to the total weight of the formulation .
• the formulation comprises less than 1% by weight of PVOH, preferably less than 0.5% by weight of PVOH, relative to the total weight of the formulation. More specifically, according to one embodiment of the invention, the formulation is free from PVOH.
• the BET specific surface area of the silicates ranges from 1 to 250 m 2 / g and / or the median diameter of the silicates ranges from 0.5 to 20 ⁇ m and / or the dimensional form factor of the silicates is greater than or equal to 1 : 2.
• the silicates are chosen from aluminum silicates, aluminum and magnesium silicates, preferably from aluminum silicates.
• the formulation further comprises one or more additives chosen from mineral fillers other than silicates, peroxide-type products, vitamins other than vitamin E, vegetable or animal waxes.
• said additive (s) represent from 0.05 to 20% by weight, preferably from 0.1 to 15% by weight, advantageously from 1 to 10% by weight, of the total weight of the formulation.
• the capsule meets the EN standard
• the capsule contains at least 60% by weight of bio-based material.
• the bottom, the side wall and the circular rim are formed by injection molding in a single layer of said formulation in a mold.
• the cover consists of a monolayer or multilayer film in one or more materials chosen from biodegradable materials, preferably chosen from paper, nonwovens, cellulose, layers. SiOx, polylactic acid polymers, polyhydroxyalkanoates, hybrid layers of organic polymer and inorganic fibers, layers coated with polyvinyl alcohol or copolymer of ethylene and vinyl alcohol, layers metallized for example using aluminum , these layers of material being able to be separated by a layer of glue.
• the cover consists of a multilayer consisting of: i) a film of paper or filter paper, ii) a barrier layer, and iii) a layer of nonwoven, said layer of nonwoven. -woven being inside the capsule.
• the barrier layer consists of one or more layers chosen from: - a hybrid barrier layer organic polymer and inorganic compounds, and / or
• the invention also relates to a method of manufacturing a capsule according to the invention, comprising the steps: a) Preparation of the formulation by mixing the ingredients, b) injection molding of the formulation obtained in step a) in a mold to form a layer of the enclosure, optionally one or more layers of the enclosure can be injection molded, using a formulation different from the formulation of step a), c) filling the enclosure with the substance in powder form, d) closing the enclosure using the cap to form the capsule.
• the capsules according to the invention meet the compostability standard EN 13432, they are then said to be biodegradable under industrial composting conditions.
• the capsules according to the invention are biodegradable under domestic composting conditions according to French recommendations. In particular, they meet the NF T 51800 (2015) standard. The capsules according to the invention will typically meet the Australian standard AS 5810 (2010).
• the capsules according to the invention typically comprise at least 60% by weight of materials of bio-based origin.
• the capsules according to the invention are stable on storage since they have a good seal against oxygen and water vapor. In particular, they can be stored and kept for at least 12 months before being consumed.
• the capsules according to the invention are compatible with Nespresso® machines.
• the capsules according to the invention exhibit a barrier function, that is to say that they will typically exhibit an oxygen permeability of less than 3.0 x 10 -3 cm 3 / capsule / 24hrs at 0.21 atm at 23 ° C and 50% RH (relative humidity), preferably equal to or less than 2.5 x 10 3 cm 3 / capsule / 24 hours at 0.21 atm at 23 ° C and 50% RH, more preferably equal to or less than 1.5 x 10 3 cm 3 / capsule / 24 hours at 0.21 atm at 23 ° C and 50% RH, measured according to ASTM F1307 or ISO 15105-2.
• RH relative humidity
• the capsules according to the invention are compostable, by industrial composting and / or by home composting, advantageously they are compostable both by industrial composting and by home composting.
• FIG. 1 is a schematic cross-sectional view of an enclosure implemented according to the invention.
• FIG. 2 is a schematic cross-sectional view of a capsule implemented according to the invention.
• the present invention relates to a sealed capsule in the form of an individual portion, adapted to be extracted under pressure, containing at least one edible substance in powder form, for the preparation of a drink such as ground coffee, tea or coffee. soluble powders.
• the capsule is adapted to be opened under the effect of the increase in pressure when an extraction liquid is injected.
• the capsule according to the invention consists of at least 95% by weight of biodegradable materials, preferably 100% of biodegradable materials.
• biodegradable is meant a material capable of decomposing under the action of living organisms, such as bacteria, fungi or algae, to transform for example into carbon dioxide, water and / or methane.
• the capsule according to the invention comprises an enclosure and a cover welded to the periphery of the rim of the enclosure.
• the enclosure thus comprises a bottom and a side wall having a circular rim.
• the circular rim makes it possible to hold the capsule when it is introduced into a machine as well as to create a sealing zone when it is used in said machine, such as a coffee machine.
• the capsule enclosure is typically prepared by one-piece molding of the bottom, side wall, and circular rim, from a formulation.
• This one-piece molding can be performed in one or more layers, it being understood that at least one layer consists of the formulation described in the invention.
• each coat will be a different formulation.
• the molding of the enclosure is performed in two layers, it could be one layer of the formulation of the invention and a barrier layer consisting of, for example, polyvinyl alcohol (PVOH).
• PVOH polyvinyl alcohol
• barrier layer constituted, for example, of PVOH.
• the molding of the enclosure is carried out in a single layer of the formulation of the invention.
• the formulation includes:
• PVOH polyvinyl alcohol
• all of the ingredients in the formulation are biodegradable.
• the PHBs are chosen from poly3-hydroxybutyrate-co-3-hydroxyhexanoate (PHBH) polymers, polyhydroxybutyrate / hydroxyvalerate (PHBV) polymers, and their mixture.
• the silicates are chosen from aluminum silicates, aluminum and magnesium silicates, preferably from aluminum silicates.
• the silicates are chosen from phyllosilicates, preferably aluminum phyllosilicates.
• the phyllosilicates are chosen from kaolinites, halloysites, and their mixture.
• the aluminum silicates are kaolins.
• the silicates preferably aluminum silicates, have a particle size with a median diameter measured by laser particle size distribution ranging from 0.5 ⁇ m to 20 ⁇ m, and / or a specific surface area (BET method) ranging from 1 to 250 m 2 / g.
• these silicates have dimensional form factors greater than or equal to 1: 2, advantageously greater than or equal to 1: 4, and particularly greater than or equal to 1: 6, we can then speak of acicular shape.
• the form factor can be determined by microscopy, for example by scanning electron microscopy (SEM).
• SEM scanning electron microscopy
• the silicates typically of acicular form, will have one or even two nanometric dimensions (from 1 nm to 100 nm), it being understood that these silicates comprise at least one micrometric dimension (from 1 ⁇ m to less than 1 mm) , this in order to respect the standards relating to food contact.
• This nano / micro sizing will allow the introduction of a lower quantity of silicates, compared to a micrometric carbonate or talc and has at least 2 advantages:
• the formulation comprises:
• polymer (i) from 50 to 99.9% by weight, preferably from 75 to 99.5% by weight, advantageously from 90 to 99% by weight, of polymer (s) chosen from among PHBs,
• ingredient (ii) from 0.1 to 50% by weight, preferably from 0.5 to 25% by weight, advantageously from 1 to 10% by weight, of ingredient (s) chosen from silicates, vitamin E, plasticized vegetable or animal proteins, or their mixtures, relative to the total weight of the formulation.
• the formulation comprises:
• polymer (i) from 50 to 99.9% by weight, preferably from 75 to 99.5% by weight, advantageously from 90 to 99% by weight, of polymer (s) chosen from among PHBs,
• ingredient (ii) from 0.1 to 50% by weight, preferably from 0.5 to 25% by weight, advantageously from 1 to 10% by weight, of ingredient (s) chosen from silicates, vitamin E, or their mixtures, relative to the total weight of the formulation.
• the formulation comprises:
• polymer (i) from 50 to 99.9% by weight, preferably from 75 to 99.5% by weight, advantageously from 90 to 99% by weight, of polymer (s) chosen from among polyhydroxybutyrate / hydroxyvalerate (PHBV ),
• the formulation comprises:
• polymer (i) from 50 to 98.9% by weight, preferably from 75 to 97.5% by weight, advantageously from 80 to 94% by weight, of polymer (s) chosen from among PHBs,
• ingredient (ii) from 0.1 to 40% by weight, preferably from 0.5 to 25% by weight, advantageously from 1 to 10% by weight, of ingredient (s) chosen from aluminum silicates , plasticized vegetable or animal proteins, vitamin E, or their mixtures,
• the formulation comprises:
• polymer (i) from 50 to 98.9% by weight, preferably from 75 to 97.5% by weight, advantageously from 80 to 94% by weight, of polymer (s) chosen from among PHBVs,
• the formulation comprises:
• PHBH polyhydroxybutyrate-co-3-hydroxyhexanoate
• PHBV polyhydroxybutyrate / hydroxyvalerate
• the formulation comprises:
• PHBH polyhydroxybutyrate-co-3-hydroxyhexanoate
• PHBV polyhydroxybutyrate / hydroxyvalerate
• the formulation comprises:
• PHBV polyhydroxybutyrate / hydroxyvalerate
• the formulation can optionally further comprise one or more additives chosen from mineral fillers other than silicates, peroxide-type products, vitamins other than vitamin E, vegetable or animal waxes.
• said additive or additives represent from 0.05 to 20% by weight, preferably from 0.1 to 15% by weight, advantageously from 1 to 10% by weight, of the total weight of the formulation.
• the formulation consists entirely of biodegradable materials.
• the formulation used in the invention is typically produced by extrusion, preferably by twin-screw extrusion. A formulation in the form of granules can then be obtained.
• the capsule meets the EN 13432 standard.
• the capsule according to the invention contains at least 60% by weight of materials of biobased origin, relative to the total weight of the capsule.
• the content of materials of bio-based origin can be determined according to standard IS016620-1 -3.
• the capsule contains a substance in powder form for the preparation of a drink.
• the drink will preferably be coffee, tea, a chocolate product, preferably coffee.
• the substance in powder form for preparing coffee may be roasted and ground coffee, soluble coffee or a mixture thereof.
• the capsule according to the invention can be prepared by the following process: a) Preparation of the formulation by extrusion of the ingredients, b) injection molding of the formulation in a mold to form a layer of the enclosure, optionally one or more others layers of the enclosure can be injection molded, typically using at least one formulation different from the formulation of step a), for example using a PVOH formulation, c) filling the enclosure with the substance in powder form, d) closing the enclosure using the cap to form the capsule.
• the preparation process comprises a single injection molding step using the formulation defined in the invention.
• the enclosure according to the invention will then, according to this embodiment, consist of a single layer of formulation defined in the invention.
• the enclosure generally has a thickness ranging from 0.2 to 1 mm, preferably 0.5 to 0.8 mm.
• the bottom of the enclosure is suitable for being perforated and may optionally include a recess.
• the circular rim is formed during the production of the enclosure by thermoplastic injection in a mold having the appropriate shape.
• Said circular rim may have a width ranging from 1 to 4 mm.
• the main function of the circular rim is to abut against an edge of a capsule holder of the beverage maker during the phase of extracting the beverage, for example coffee, and thus allow the firm hold of the beverage. the capsule during pressure build-up.
• the mold for the injection will typically thus comprise a bottom, a side wall and a circular rim, in order to obtain each of the layers of the enclosure, preferably the enclosure will consist of a single layer of the formulation of the compound. 'invention.
• the cover typically has a dimension calibrated so as to conform to the contour of the circular rim of the enclosure of the capsule, thus closing the enclosure.
• the substance in powder form preferably ground coffee, is therefore trapped in the hollow chamber.
• the seal will be glued or heat-sealed to the circular rim of the capsule enclosure.
• the cover consists of a biodegradable film.
• the cover may be a single-layer or multi-layer film with a total thickness ranging from 90 to 300 ⁇ m.
• the cover can thus be made up of one or more layers of materials chosen from paper, nonwovens, cellulose, barrier layers, these layers of material that can be separated by a layer of glue, which would itself be biodegradable.
• PLA polylactic acid
• PHA polyhydroxyalkanoate
• barrier layers mention may be made of SiOx layers, PLAs, hybrid organic polymer layers and inorganic fibers, layers coated with PVOH (polyvinyl alcohol) or EVOH (copolymer of ethylene and vinyl alcohol), metallized layers for example using aluminum, the barrier layers produced by vaporization (plasma deposition or by vacuum).
• PVOH polyvinyl alcohol
• EVOH copolymer of ethylene and vinyl alcohol
• barrier is meant the ability of a material to limit or reduce the passage of oxygen and / or water vapor or humidity, we can then speak of barrier layer to oxygen and / or humidity.
• layers comprising polycondensates of silicic acid modified with organic groups and inorganic compounds.
• organic groups mention may be made of polycaprolactones, chitosan and celluloses.
• Silicic acid polycondensate contains Si-O-Si bonds.
• the inorganic compounds mention may be made of silicon cations optionally in combination with other cations such as aluminum, titanium, boron or zirconium.
• a cover consisting of: i) a film based on baking paper, ii) a layer of glue and / or a barrier layer, iii) a layer of nonwoven, once implemented in the capsule, layer i ) is the outer layer and layer iii) is the layer inside the capsule;
• a cover consisting of: i) a film based on filter paper, ii) a barrier layer, iii) a barrier film such as a cellulose film or PLA film, iv) a non-woven layer, once applied implemented in the capsule, layer i) is the outer layer and layer iv) is the layer inside the capsule; - a cover consisting of: i) a cellulose film, for example of the Bachflex® type, ii) a nonwoven layer, once implemented in the capsule, layer i) is the outer layer and layer ii) is the layer inside the capsule;
• a cover consisting of: i) a film of paper or filter paper, ii) a hybrid barrier layer organic polymer and inorganic compounds, iii) an SiOx barrier layer, iv) a cellulose barrier film, v) a non-woven layer , once implemented in the capsule, the layer i) is the outer layer and the layer v) is the layer inside the capsule.
• the enclosure 2 consists of a bottom 3 of substantially circular shape and a side wall 4 provided with a circular rim 5.
• the capsule 1 according to the invention comprises the enclosure 2 and a cover 6.
• the enclosure 2 consists of a bottom 3 of substantially circular shape and a side wall 4 provided with a circular rim 5.
• the capsule according to the invention further comprises a substance in powder form for the preparation of a drink (introduced before closing the capsule using the cap) which has not been shown in FIG. 2.
• the invention also relates to a method of manufacturing a capsule according to the invention.
• the method of the invention comprises the steps: a) Preparation of the formulation by extrusion of the ingredients, b) injection molding of the formulation in a mold to form a layer of the enclosure, optionally one or more other layers of the enclosure can be injection molded, typically using at least one formulation different from the formulation of step a), for example using a PVOH formulation, c) filling the enclosure with the substance in powder form, d) closing the enclosure using the cap to form the capsule.
• the preparation process comprises a single injection molding step using the formulation defined in the invention.
• the enclosure according to the invention will then, according to this embodiment, consist of a single layer of formulation defined in the invention.
• the invention relates to the use of a formulation as defined in the present invention in order to prepare a capsule having a low permeability to gases and to humidity.
• the enclosure according to the invention has an oxygen permeability of less than 3.0 x 10 -3 cm 3 / capsule / 24hrs at 0.21 atm at 23 ° C and 50% RH (relative humidity), preferably equal or less than 2.5 x 10 -3 cm 3 / capsule / 24hrs at 0.21 atm at 23 ° C and 50% RH, more preferably equal to or less than 1.5 x 10 -3 cm 3 / capsule / 24hrs at 0.21 atm at 23 ° C and 50% RH, measured according to ASTM F1307 or ISO 15105-2.
• the enclosure is fixed to a plate, so that the plate allows the enclosure to "close”.
• Table 1 describes the formulations which were prepared. The percentages indicated are percentages by weight relative to the total weight of the formulation.
• Enclosures were prepared, in accordance with the process described above, namely by extrusion in a twin-screw extruder of the ingredients in order to obtain formulation granules, followed by injection molding in a single layer in a mold in order to form the bottom, side wall and circular rim of the enclosure.
• the oxygen permeability of the enclosures was measured according to ASTM F1307 or ISO 15105-2 and is shown in Table 2.
• the capsules comprising the enclosure as defined in the invention exhibit very low permeability to oxygen.
• formulations of biodegradable materials (2, 3, 4) result in enclosures having greater permeability to oxygen.
• the examples show that the invention thus makes it possible to obtain a biodegradable capsule, in particular under the conditions of industrial composting and domestic composting, further having a very low permeability to oxygen, and this even when the enclosure is made. with a single layer of formulation.

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• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Organic Chemistry (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Non-Alcoholic Beverages (AREA)
• Wrappers (AREA)
• Tea And Coffee (AREA)
• Cosmetics (AREA)
• Manufacturing Of Micro-Capsules (AREA)
• Coloring Foods And Improving Nutritive Qualities (AREA)
• Biological Depolymerization Polymers (AREA)
• General Preparation And Processing Of Foods (AREA)

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• 2020
  • 2020-05-29 FR FR2005734A patent/FR3110900B1/fr active Active
• 2021
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  • 2021-05-28 US US17/927,932 patent/US20230202746A1/en active Pending
  • 2021-05-28 WO PCT/EP2021/064419 patent/WO2021239982A1/fr active Application Filing
  • 2021-05-28 JP JP2022572639A patent/JP2023529320A/ja active Pending
  • 2021-05-28 MX MX2022014730A patent/MX2022014730A/es unknown
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  • 2021-05-28 CA CA3184488A patent/CA3184488A1/en active Pending
  • 2021-05-28 CN CN202180037710.XA patent/CN115720564A/zh active Pending
  • 2021-05-28 EP EP21729519.5A patent/EP4157745A1/de active Pending

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