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
• • 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
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
  • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
• • 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

• TITLE SINGLE-USE BIODEGRADABLE CLOSED CAPSULES CONTAINING A SUBSTANCE IN THE FORM OF POWDER TECHNICAL FIELD OF THE INVENTION
• the present invention relates to the field of biodegradable closed capsules for single use and without overwrapping, containing at least one substance in powder form, 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 second category of capsule.
• biodegradable capsules in particular 100% biodegradable, making it possible to prepare a drink, such as coffee, of satisfactory quality, when it is used in an espresso-type machine. , in particular a machine having pyramid plates.
• the present invention relates to a capsule (1) in the form of an individual portion, adapted to be extracted under pressure, containing at least one edible substance (2) in the form of a soluble powder, consisting of two identical leaves (3, 3 ') of circular, oval or polygonal shape, allowing a space for the edible substance, and welded on their periphery in order to obtain a capsule substantially symmetrical with respect to its welding plane, said capsule being characterized in that each sheet ( 3, 3 ') consists of at least two biodegradable layers (4, 4'): (i) a first layer (4) is a film selected from a film of cellulose, polylactic acid polymer, polyhydroxyalkanoate polymer, poly (butylene succinate) polymer or paper, and
• each sheet (3, 3 ’) is a barrier to oxygen and / or water vapor;
• the second layer (4 ’) is the outer layer and the first layer (4) is the inner layer of the capsule;
• each sheet (3, 3 ’) has a coating layer
• the first layer (4) is a barrier film chosen from a film of cellulose, of polylactic acid polymer, of polyhydroxybutyrate polymer such as poly (3-hydroxybutyrate-co-3-hydroxyvalerate); and or
• the second layer (4 ') is a nonwoven and said nonwoven preferably consists of one or more materials chosen from cellulose, polylactic acid polymers, polyhydroxyalkanoate polymers, such as polyhydroxybutyrates such as poly (3-hydroxybutyrate-co-3-hydroxyvalerate), preferably from polylactic acid or polyhydroxyalkanoate polymers, such as polyhydroxybutyrates such as poly (3-hydroxybutyrate-co-3-hydroxyvalerate); and or
• each sheet consists of three layers, the third layer (iii) being able to be located either inside the capsule, or outside the capsule, or between the first and the second layer of each sheet of the capsule ; and or
• the third layer (iii) is a layer of a biodegradable nonwoven material, identical or different from the second layer (ii) and the layer (i) is the intermediate layer between the two layers of biodegradable nonwoven (ii ) and (iii) or else the third layer (iii) is a barrier film, identical or different from the first layer (i); and or
• the layers (i) and (ii) and where appropriate the layer (iii) of each sheet are assembled to each other using a continuous or discontinuous layer of adhesive (5), said adhesive preferably being a biodegradable glue; and or
• the layers (i) and (ii) and where appropriate the layer (iii) of each sheet are assembled to each other using several contact points extending over the entire surface of the sheet, said points contact which may be points of glue; and or the sheets of the capsule consist of at least 60% by weight of biobased materials, preferably at least 70% by weight of biobased materials, or even at least 80% by weight of biobased materials; and or
• the first layer (i) is a multilayer film made up of at least two layers of different materials, bonded together with an adhesive.
• the invention also relates to a method of manufacturing a capsule according to the invention, comprising the steps: a) deformation of the two sheets symmetrically, b) dosage and deposit of the substance in powder form on one of the two sheets, c) welding of the two sheets on their periphery.
• the method comprises a preliminary step (before step a)) of preparing each of the two sheets, preferably by bonding the layers (i) and (ii), where appropriate the layers (i), ( ii) and (iii), over the entire surface of each sheet, said bonding being a continuous or discontinuous bonding
• the capsules according to the invention are simple to manufacture and they make it possible to prepare a drink by pressurizing with improved quality, in particular thanks to a good opening of the capsule on the pyramid plates present on certain espresso machines.
• the capsules according to the invention do not require overwrapping and can advantageously be 100% biodegradable.
• the capsules according to the invention meet the compostability standard EN 13432.
• FIG. 1 is a schematic sectional representation of a sheet before deformation, including a layer (i) and a layer (ii), including an embodiment with a continuous adhesive layer and an embodiment with a discontinuous adhesive layer .
• FIG. 2 is a schematic representation of a sheet after deformation, including a layer (i) and a layer (ii).
• FIG. 3 is a schematic representation in exploded view of an assembly of two leaves and an edible substance, each leaf including a layer (i) and a layer (ii).
• FIG. 4 is a schematic representation of a capsule according to the invention comprising two sheets welded on their periphery and an edible substance within the space formed by the two sheets.
• FIG. 5 is a schematic representation of a closed capsule according to the invention with a perspective view.
• the present invention relates to a capsule in the form of a single portion, suitable for extraction under pressure, containing at least one edible substance in the form of a soluble powder.
• the capsule according to the invention consists of two identical leaves of circular, oval or polygonal shape, allowing space for the edible substance.
• the capsule is adapted to be opened under the effect of the increase in pressure when an extraction liquid is injected.
• the capsule is symmetrical and consists of two faces. More particularly, the capsule can be opened on one of these faces under the effect of the pressure (for example on the pyramids of a coffee machine) and the capsule can be opened by tearing by spikes (for example during the closing the coffee machine) on the other side.
• Each sheet of the capsule according to the invention consists of at least two biodegradable layers:
• a first layer is a film selected from a cellulose film, a polymer film of polylactic acid (PLA) type, a polymer film of polyhydroxyalkanoate (PHA) type such as polyhydroxybutyrate (PHB), a polymer film of the poly (butylene succinate) (PBS) type, or a paper film, and
• a second layer chosen from nonwovens made from a biodegradable material or woven filters made from a biodegradable material, preferably from biodegradable materials chosen for example from polylactic acid polymers, polyhydroxybutyrate polymers, polymers polyhydroxyalkanoate, cellulose, and combinations thereof.
• Layer (i) is different from layer (ii).
• the layer (ii) is a nonwoven or a woven filter while the layer (i) is a film and is not a nonwoven and cannot as such perform a filter function. More particularly, the layer (i) is typically a barrier film.
• the woven filter has a pore size ranging from 10 to 450 ⁇ m, preferably from 15 to 300 ⁇ m, or even from 20 to 200 ⁇ m.
• polyhydroxyalkanoate (PHA) type mention may be made of polyhydroxybutyrate (PHB) polymers, polyhydroxyvalerate (PHV) polymers.
• polymers of polyhydroxybutyrate (PHB) type mention may be made of the polymer poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV).
• the film of layer (i) of each sheet of the capsule is made of biodegradable material (s) and even more advantageously of biodegradable and biobased material (s).
• the capsule according to the invention consists of at least 95% by weight of biodegradable materials, more preferably 100% of biodegradable materials.
• the sheets used according to the invention consist of at least two biodegradable layers.
• layer is meant a material consisting of a monolayer or a multilayer.
• biodegradable is meant a material capable of decomposing under the action of living organisms external to its substance, such as bacteria, fungi or algae, to transform for example into carbon dioxide, water and / or in methane.
• 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 sheet to oxygen and / or humidity.
• each oxygen barrier sheet when implemented in the capsule according to the invention will pass less than 300 mg of oxygen (O2) per kilogram of edible substance for a period of 18 months, preferably less. 150 mg of oxygen (O2) per kilogram of edible substance for a period of 18 months.
• each barrier sheet to moisture or water vapor when it is implemented in the capsule according to the invention will allow less than 2 ⁇ 10 3 mg of H 2 0 per capsule for 24 hours at 23 hours.
• each sheet of the capsule according to the invention will be a barrier sheet to oxygen and to water vapor.
• internal layer of the sheet within the meaning of the present invention, is meant the layer of material located inside the capsule, once the two sheets are assembled to form the capsule.
• outer layer of the sheet within the meaning of the present invention, is meant the layer of material located on the outside of the capsule, once the two sheets are assembled to form the capsule.
• intermediate layer of the sheet within the meaning of the present invention, is meant the optional layer of material located between the internal layer of the sheet and the external layer of the sheet.
• inner face of the inner layer of the sheet within the meaning of the present invention, is meant the face of the inner layer which will be intended to be in contact with the edible substance, inside the capsule.
• outer face of the outer layer of the sheet within the meaning of the present invention, is meant the face of the outer layer intended to be in contact with the external environment of the capsule.
• flexible sheet is understood to mean a sheet which can be deformed, stretched, without breaking.
• biopolymer is meant a bio-based and biodegradable polymer.
• the two sheets are welded on their periphery in order to obtain a capsule which is substantially symmetrical with respect to its welding plane.
• each of the two sheets of the capsule has typically been stretched beforehand, before welding, to obtain the desired shape of the capsule, allowing after assembly of the two sheets, to form a space allowing the edible substance to be formed.
• each sheet Before stretching or deformation, each sheet is typically a substantially planar flexible sheet and the stretching may result in a decrease in the flexibility of the sheet, but the sheet thus stretched or deformed may retain some flexibility after stretching.
• Each sheet consists of at least two layers:
• the internal face of the internal layer of each sheet is coated, for example using a coating layer chosen from biodegradable adhesives, acrylic adhesives, polyester adhesives, polyurethane adhesives, polyester urethane glues, ethylene vinyl acetate, and mixtures thereof.
• the coating can thus be chosen from biodegradable acrylic polymers, biodegradable polyester polymers, PLAs, PHAs, polycaprolactones, PBS adipate, poly (butylene adipate-co-terephthalate), PLA / caprolactone copolymers, starch, hydrocarbon resins, pine resin.
• the coating of the inner face of the inner layer of each sheet facilitates the welding, while the closure of the capsule according to the invention.
• the coating is particularly useful when the inner layer of the sheet is a barrier-type layer, for example a layer (i).
• each sheet consists of at least three layers:
• barrier layer being able to be located either inside the capsule, or outside the capsule, or between the first and the second layer of the flexible sheet of the capsule.
• the flexible sheets are a barrier to oxygen and / or water vapor. This slows down or even prevents the degradation of the substance in powder form during storage of the capsule.
• the capsule is an oxygen barrier capsule. Indeed, typically less than 300 mg of oxygen (O2), or even less than 150 mg of oxygen, per kilogram of edible substance enters the capsule according to the invention for a period of 18 months.
• O2 oxygen
• 150 mg of oxygen per kilogram of edible substance enters the capsule according to the invention for a period of 18 months.
• the capsule is a water vapor barrier capsule. Indeed, typically less than 2x10 3 mg of H 2 0 enters the capsule for 24 hours at 23 ° C and 50% relative humidity, preferably less than 0.5x10 3 mg of HO enters the capsule for 24 hours at 23 ° C and 50% relative humidity.
• the capsule according to the invention is an oxygen barrier and water vapor barrier capsule.
• each flexible sheet are integral with one another.
• the different layers of each flexible sheet can be connected to each other by gluing, using an adhesive suitable for contact with food, or by calendering or by flat coextrusion or by coating.
• the layer (i) is bonded to the layer (ii) by a continuous or discontinuous layer of adhesive. If each sheet comprises a layer (iii), then said layer (iii) can also be joined to layers (i) and / or (ii) using a layer of glue.
• the layers of each sheet are secured to each other by several contact points over their entire surface.
• the contact between the different layers of each sheet is thus preferably punctual, as opposed to continuous contact over the entire surface of each layer.
• This embodiment with a point contact (gluing points or calendering of part of the surface by points) on the whole of the surface of the sheet allows better deformation of the sheet, taking into account the possibly different behavior of the different layers of the sheet against deformation.
• This embodiment makes it possible to avoid tearing during the deformation or stretching of the sheet, during the manufacture of the capsule of the invention.
• the glue suitable for contact with food can be chosen from biodegradable glues, acrylic glues, polyester glues, polyurethane glues, polyester urethane glues, ethylene vinyl acetate, and mixtures thereof. If a non-biodegradable glue is used, it should be noted that its quantity may be in an amount such that the capsule in fine may satisfy the test of standard EN 13432.
• the glue can be chosen from biodegradable acrylic polymers, biodegradable polyester polymers, PLA, PHA, polycaprolactones, adipate PBS, poly (butylene adipate-co-terephthalate), PLA / copolymers. caprolactone, starch, hydrocarbon resins, pine resin.
• the glue can represent from 1 to 5 g / m 2 , or even from 2 to 4 g / m 2 on a dry basis relative to the surface of the flexible sheet.
• the layer (i) will have a thickness ranging from 10 to 800 ⁇ m, preferably from 10 to 500 ⁇ m, advantageously from 10 to 200 ⁇ m.
• the layer (i) is a multilayer film made up of at least two layers of different materials.
• the different layers can be integral with or bonded to each other, by means of a layer of glue for example.
• the glue making it possible to obtain the multilayer of layer (i) can be a glue suitable for contact with food, for example chosen from biodegradable glues, acrylic glues, polyester glues, polyurethane glues, polyester urethane glues, ethylenes vinyl acetate, and mixtures thereof. If a non-biodegradable glue is used, it should be noted that its quantity may be in an amount such that the capsule in fine may satisfy the test of standard EN 13432.
• the glue of the multilayer (i) can be chosen from biodegradable acrylic polymers, biodegradable polyester polymers, PLAs, PHAs, polycaprolactones, PBS adipate, poly (butylene adipate-co-terephthalate) , PLA / caprolactone copolymers, starch, hydrocarbon resins, pine resin.
• multilayer film By way of multilayer film, mention may also be made of PLA films coated, for example with a layer of silica or PLA / cellophane / PLA multilayers, the layers of which can be bonded together with a layer of adhesive and of which the PLA can optionally be coated for example with a layer of silica.
• the silica layer can for example be applied by plasma.
• the multilayers can have a total thickness ranging from 15 to 500 ⁇ m or from 20 to 200 ⁇ m.
• multilayer film By way of multilayer film, mention may be made of coated cellulose films, for example metallized cellulose films or multilayer films with an optionally metallized cellulose layer and a layer of a biopolymer.
• the layer (i) of each sheet can be a multilayer film:
• biopolymer glue for example a compostable pressure sensitive adhesive, such as an acrylic copolymer type glue,
• layer (ii) is a nonwoven of a biodegradable material chosen from polymers PLA, PHA such as PHB, cellulose, and combinations thereof, preferably from PLA and PHBs such as PHBV, cellulose and combinations thereof.
• the nonwoven layer (ii) can consist of a mixture of these materials.
• the nonwoven comprises at least 85%, more preferably at least 90% by weight of fibers.
• the fibers of the nonwoven layer consist of at least 40% by weight of fibers of a PLA polymer or of a PHA polymer, preferably at least 50% by weight, advantageously at least 60% by weight, said polymer possibly being chosen from PLA and PHBV and cellulose.
• a nonwoven is a material obtained by random arrangement of individual fibers which are interwoven.
• Processes for preparing nonwovens are known to those skilled in the art. They include, for example, direct or melt spinning ("spin laying”, “spunbond”), meltblowing, carding ("carding”), or jet dispersion spinning processes.
• water water laying
• air jet air laying
• the cohesion of the fibers and therefore of the nonwoven is obtained in the absence of adhesive or binder by a melt manufacturing process (“spunbond”).
• the nonwoven will comprise 100% by weight of fibers, of which at least 50% by weight, advantageously 100% by weight, consist of fibers of PLA or PHA polymer, preferably PLA.
• the basis weight of the nonwoven layer (ii) ranges from 5 to 100 g / m 2 , preferably from 10 to 60 g / m 2 , advantageously from 15 to 45 g / m 2 .
• Layer (ii), preferably a nonwoven, can be monolayer or bilayer. If it is a bilayer, then said bilayer can be one-component, that is to say contain only one type of PLA or two-component, that is to say contain two different types of PLA having for example different melting points.
• the two layers can be bonded to each other by calendering or possibly by gluing.
• Layer (ii), preferably a nonwoven can be a monolayer made up of at least two different materials, for example a mixture of cellulosic fibers and PLA fibers, or a bilayer made up of a layer of fibers cellulose and a layer of PLA fibers.
• the layer (ii) will have a thickness ranging from 0.1 to 3 mm, preferably from 0.1 to 1 mm.
• the outer layer of each flexible sheet is a layer (ii) chosen from nonwovens made from a biodegradable material or woven filters made from a biodegradable material, preferably chosen from non-woven materials. woven fabrics made of a biodegradable material.
• the material (s) of layer (ii) is / are chosen from PLA or PHA polymers, such as PHB. This embodiment is particularly well suited when the capsule is used in an espresso-type coffee machine using pyramid plates.
• the layer of nonwoven or external woven filter then makes it possible to facilitate the flow of the coffee since this layer can create a distance between the film (i) and the pyramid plates and thus prevent blocking.
• some biodegradable materials other than non-woven materials or woven filters tend to conform to the pyramid shape of the platelets when heated, which can prevent the flow of coffee.
• the third layer (iii) can be:
• an additional filter layer a layer of a biodegradable non-woven material which may be identical or different from the layer (ii) defined in the present invention.
• the additional filter layer will have a thickness ranging from 0.1 to 3 mm, preferably 0.1 to 1 mm.
• the additional filter layer can be made of polylactic acid polymer.
• the third filter layer will be a biodegradable layer.
• each sheet of the capsule according to the invention consists of three layers:
• the three layers can be connected to each other using a continuous or discontinuous layer of adhesive (by points of adhesive over the entire surface of the sheet) .
• each sheet of the capsule according to the invention consists of three layers:
• an intermediate layer of a film chosen from a film of cellulose, polylactic acid polymer, poly (3-hydroxybutyrate-co-3-hydroxyvalerate) or paper, and
• the barrier layer (iii) will have a thickness ranging from 5 to 800 ⁇ m, preferably 10 to 500 ⁇ m.
• the third barrier layer will be a biodegradable layer.
• the barrier layer may be made of a material chosen from cellulose, polylactic acid polymer (PLA), poly (3-hydroxybutyrate-co-3-hydroxyvalerate) polymer (PH BV) or paper, preferably cellullose.
• PVA polylactic acid polymer
• PH BV poly (3-hydroxybutyrate-co-3-hydroxyvalerate) polymer
• the barrier layer can be coated by a sputtering, metallization or plasma process.
• the sheets of the capsule consist of at least 60% by weight of bio-based materials, preferably at least 70% by weight of bio-based materials, or even at least 80% by weight of bio-based materials, relative to the total weight of the leaves in the capsule.
• the content of bio-based material can be determined according to standard EN 16785-1.
• the sheets of the capsule comprise a biobased carbon content of at least 60% by weight, preferably at least 70% by weight, or even at least 80% by weight, relative to the total weight of the leaves of the capsule.
• the bio-based carbon content can be determined according to ASTM D6866 and EN 16640 standards.
• Each sheet, initially flat and flexible, is previously deformed to be put in the form of a cup (or saucer) allowing, once the two sheets are assembled, to form a space to contain the edible substance.
• the deformation is a permanent deformation, thanks to a memory effect thus, once the sheet is deformed, it keeps its cup (or saucer) shape without returning to its initial substantially flat shape.
• Said deformation can be carried out by stretching, in a mold having the desired shape, according to techniques making it possible to avoid random folds and breaks.
• the sheet is pinched between a plate, in which the final shape is hollowed out, and another plate on which is mounted a piston, the end of which has the final shape but in positive.
• a plate in which the final shape is hollowed out
• a piston the end of which has the final shape but in positive.
• the plate with negative shape and / or the end of the piston can be heated.
• the temperature may be between 30 and 100 ° C, preferably between 30 ° and 65 ° C.
• the piston can be replaced by a flow of compressed air; the latter may, depending on the materials used for the sheets, be heated in the same temperature ranges.
• the air flow can be replaced or used in combination with water vapor. Indeed, when a layer is made of paper, the water vapor will ensure the deformation of the paper in tearing.
• the capsule is prepared by inserting the edible substance into the hollow of one of the leaves, the other leaf is placed opposite, so as to form a substantially symmetrical capsule and the two leaves are welded on their periphery in order to close the capsule.
• the outer shape of the capsule may be circular, oval or polygonal, preferably circular.
• the space containing the edible substance has a thickness at its center ranging from 5 mm to 20 mm, and a maximum diameter ranging from 20 mm to 80 mm.
• the two flexible sheets are welded on their periphery in order to obtain a capsule which is substantially symmetrical with respect to its welding plane. Indeed, the capsule will have on the outside, the same outer layer of material on these two outer faces and on the inside, the same inner layer of material on these two inner faces.
• a weld is a fusion of two materials.
• the weld is carried out on the flat face.
• the welded border has a width ranging from 2 to 20 mm.
• 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 of these.
• the substance is compacted beforehand, in a shape having substantially that of the space which will be formed after welding the two flexible sheets.
• the capsule according to the invention being substantially symmetrical, can be used in espresso-type machines, either in both directions.
• Fig. 1 shows a sectional view of a sheet 3 before deformation comprising two different layers 4 and 4 ', corresponding respectively to layers (i) and (ii) defined in the present invention.
• the layers 4 and 4 ' are interconnected by means of a continuous adhesive layer 5.
• the layers 4 and 4 ′ are interconnected by means of a discontinuous layer of adhesive 5 ′, put in place by spots.
• the layers (i) and (ii) are linked together by contact points.
• Fig. 2 shows a sectional view of a sheet 3 after deformation, comprising two different layers 4 and 4 ’, corresponding respectively to layers (i) and (ii) defined in the present invention.
• the two layers (i) and (ii) can optionally be joined together using a layer of glue, not shown in Fig. 2.
• Fig. 3 shows an “exploded” sectional view of the elements constituting a capsule according to the invention, with a substance 2 in the space formed between the two identical sheets 3 and 3 ', each sheet 3 and 3' comprising two different layers 4 and 4 '.
• a layer of glue (not shown) may optionally be present between layers 4 and 4 ’to connect them together.
• Fig. 4 shows a sectional view of a capsule 1 comprising two identical sheets 3 and 3 'welded on their periphery, and comprising an edible substance 2. The welding is thus carried out on the periphery of the sheets 3 and 3', each of the sheets 3 and 3 'comprising at least two layers (i) and (ii) over the entire surface of the sheets 3 and 3'.
• Fig. 5 shows a perspective view of a capsule 1 comprising two identical sheets 3 and 3 ’welded on their periphery.
• the invention also relates to a method of manufacturing a capsule according to the invention.
• the method of the invention comprises, for example, the steps: a) deformation of the two sheets symmetrically, b) dosage and deposit of the substance in powder form on one of the two sheets, c) welding of the two sheets on their periphery.
• the deformation in step a) can be carried out by stretching or by molding.
• the deformation is carried out so as to transform the substantially planar shape of the flexible sheet into the shape of a cup (or saucer), the two sheets thus deformed can then form, once assembled, a space making it possible to contain the pulverulent substance.
• Step b) can also include a step of compacting the substance in powder form, preferably carried out before depositing the substance on one of the sheets.
• the method may include a step of manufacturing two identical sheets, each sheet can be obtained for example by bonding a layer (i) and a layer (ii).

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Laminated Bodies (AREA)
• Cosmetics (AREA)
• Medicinal Preparation (AREA)

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Publications (1)

Family

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• 2020
  • 2020-05-06 FR FR2004509A patent/FR3109932B1/fr active Active
• 2021
  • 2021-05-05 EP EP21723267.7A patent/EP4146563A1/de active Pending
  • 2021-05-05 WO PCT/EP2021/061904 patent/WO2021224348A1/fr unknown

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