• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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  • 优先权
    • 专利摘要:
    Compostable cover intended to seal a beverage capsule, consisting of a multilayer complex comprising at least: - a nonwoven comprising fibers, at least 50% by weight of which is composed of fibers based on polylactic acid (PLA), - a film comprising a polyhydroxyalkanoate (PHA) polymer other than PLA.
    公开号:FR3085301A1
    申请号:FR1857921
    申请日:2018-09-04
    公开日:2020-03-06
    发明作者:Florence Vidal；Mireille Roux；Gianmaria Pavan
    申请人:Ahlstrom Munksjo Specialties；
    IPC主号:
    专利说明:

    COMPOSTABLE LID FOR SEALING A CAPSULE AND CAPSULE CLOSED BY THE LID
    FIELD OF THE INVENTION
    The invention relates to a seal intended to seal a capsule, in particular of coffee. The subject of the invention is also a capsule closed by said cover. Finally, it relates to the use of this seal for closing a capsule containing a foodstuff, in particular ground coffee.
    In the following description, the invention is described in relation to coffee capsules. Nevertheless, it finds an application for all areas for which the seal is capable of containing food substances and must be resistant to water, pressure, tearing and advantageously heat-sealable on a capsule or any other food container. More specifically, the invention applies to a compostable cover intended to seal a capsule containing a dry powder (for example coffee, tea, hot chocolate, etc.) for preparing a drink.
    PRIOR STATE OF THE ART
    The coffee pods available on the market generally contain about 5 to 15 g of ground coffee. Mass quantities are lower for tea, although the volume of material to be infused is generally comparable. The percolation time of coffee machines is typically 10 to 60 seconds for a volume of water of approximately 30 to 40 ml for espresso capsules. The brewing time range is identical for a volume of water of approximately 120 to 300 ml for filter coffee capsules.
    In the food industry, the materials used are regularly subject to increasingly stringent requirements, particularly with regard to the environment. Thus, the products currently developed no longer have the sole objective of meeting the tastes of consumers. They must also respect the environment. Respect for the environment can be regulatory. It also increasingly reflects the consumer trend for reusable, recyclable or degradable products.
    Two types of coffee pods are currently offered on the market, namely:
    flexible pods consisting essentially of a non-woven sachet comprising coffee, rigid pods or capsules consisting of a capsule proper, closed by means of a seal.
    The invention relates specifically to rigid pods.
    Nespresso® type capsules are known on the European market. Such capsules are described, for example, in US Patents 7,153,530 and US 7,658,141. These capsules are typically provided with a frustoconical side wall and with a bottom formed as desired, of aluminum (20-100 μm ), pure or multilayer plastic, a cardboard / aluminum / plastic composite, or a plastic / cardboard composite. A polyurethane-type layer is provided at the bottom of the capsule to filter the coffee. The lid of these Nespresso® capsules can be formed from various materials, such as aluminum or a multilayer composite comprising paper, aluminum and / or plastic (for example polypropylene (PP), polyethylene (PE) , polyamide (PA), polyethylene terephthalate (PET), ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), etc.). In practice, the circular cover is heat sealed or crimped at the periphery of the capsule.
    There is however a great demand to transform these rigid non-compostable pods into rigid compostable pods.
    Document US 8,956,672 describes capsules of the Nespresso® type having specific characteristics of inverted shape. In the illustrated embodiments, the cover is fixed on a curved collar. It can be formed from aluminum or a multilayer composite comprising paper, aluminum and / or plastic (for example polypropylene (PP), polyethylene (PE), polyamide (PA), polyethylene terephthalate (PET), ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), etc.). The cover is sealed on the curved part of the flange and includes orifices calibrated so as to create restrictions causing a rise in back pressure during the extraction process. A filter can optionally be placed between the chamber and the seal.
    Document EP2690035A describes other forms of capsules. He describes in particular a capsule comprising a perforated bottom reinforced by a circular rib, a frustoconical or frusto-conical side wall provided with a collar, and a cover fixed to the collar after filling of the capsule with the ingredient.
    Other capsule designs are described in US 7,543,527. The capsule is formed from a cylindrical or slightly conical cup. It contains a dispensing means positioned inside the cup on an upper shoulder, close to the lid, making it possible to modify the flow of the liquid in the capsule during the infusion. The cup further includes a lower dispensing means for collecting excess liquid from the cup during extraction. The cup and the cover are made of a gas-tight multilayer composite film.
    Methods and devices for the preparation of food or drink products are also described in document EP 1 659 909 B1. This document thus describes a capsule comprising a bottom and a side wall provided with a flange. The capsule is typically made of plastic, such as EVOH, PVDC, PP, PE and / or PA in mono- or multilayer form. A cover is heat sealed on the capsule. The cover is made of a perforable material, such as aluminum, aluminum / plastic, cardboard / plastic, cardboard / aluminum / plastic, or a mono- or multilayer plastic.
    Document EP 2 648 579 B1 describes a cartridge of capsules of different frustoconical, prismatic, pyramidal shapes, etc. The capsules are provided with a collar on which a cover is heat sealed.
    Although several embodiments of capsules have been proposed, most of them are not compostable.
    To solve this problem, capsules have been developed consisting of plastics based on polylactic acid (PLA) or plastics called "compatible PLA". The so-called “compatible PLA” materials correspond to a mixture of PLA and vegetable fibers. They are biodegradable and compostable. Thus, these capsules meet the compostability conditions imposed by standard EN 13432.
    In the following description and in the claims, the term “compostable cover” designates a cover comprising at most 5% by weight of the total proportion of organic constituents without determined biodegradability (for example derived from binder or non-compostable fibers) thus responding to standard EN 13432.
    Likewise, by “compostable capsule or capsule body”, is meant a capsule comprising a maximum of 5% by weight of the total proportion of organic constituents without determined biodegradability (for example derived from binder or non-compostable fibers) thus responding to EN 13432 standard.
    To date, no satisfactory solution has been proposed for combining compostable lids with said capsules. This is not surprising, given the many constraints linked to the seal. Indeed, these pods are likely to be used in coffee machines at pressure and temperature values to which they must be mechanically resistant.
    Essentially, the implementation of the capsules in a coffee pod machine or individual capsules is done according to the following process. Once the capsule is in place, the bottom of the capsule is struck. The holes formed allow the introduction of water heated to a temperature of 96 ° C into the body of the capsule at a pressure between 10 and 12 bars. The water filling the capsule gradually exerts pressure on the seal which comes into contact with piercing elements arranged in the machine, of the spike type. The pressure at the time of the perforation of the lid and during the percolation is generally between 5 and 15 bars depending on the grain size of the coffee. Once the cap is pierced in the shape of spikes, the coffee flows into the cup. The manufacturers impose a number of conditions in terms of coffee flow. In particular, the powder should not end up in the cup. In addition, a dose of approximately 30 ml of coffee should flow in approximately 30 seconds. In addition, the liquid in flow should have a color and density similar to that of the foam. There are also a number of constraints once the coffee has been spilled even though the capsule has not yet been ejected. Indeed, in the event that the user does not eject the capsule until a few hours after the coffee has flowed, that is to say once the temperature of the capsule has returned to room temperature, it is not necessary to the capsule is deformed. Otherwise, it does not fall into the receptacle provided for this purpose when a new capsule is introduced. Nor should the lid delaminate.
    In the context of the present invention, it is considered that a cover is satisfactory in terms of resistance to pressure when the cover does not tear when it is subjected to a pressure exerted by the mixture of powder and water included. between 5 and 15 bars at the time of the perforation of the cover and during the percolation. Before perforation, the seal should not tear under the effect of increasing water pressure in the capsule. After perforation, the holes resulting from the perforation must not tear and thus enlarge under the effect of the pressure, so as on the one hand not to let escape the powder and on the other hand, to keep the characteristics coffee in terms of foam in particular.
    Document FR 3 050 725, in the name of the Applicant, describes a compostable seal intended to seal a capsule containing coffee in particular, consisting of a multilayer complex combining a nonwoven based on polylactic acid fibers with a support constituted by 'parchment paper.
    Although this cover is satisfactory in terms of compostability, the moisture barrier of this cover remains limited.
    Document US 2012/0097602 describes a capsule closed by a cover. The capsule wall includes an oxygen barrier layer sandwiched between two layers, one based on PLA and the other based on PLA or a crosslinked PHA / PLA copolymer. The cover may be two-layer. In a particular embodiment, one of the two layers is based on a heat-resistant biodegradable polymer chosen from polyolefins (PE, PP, etc.) or polyesters (PHA other than PLA, PLA) while the other layer is based on PLA. No specific combination of materials is described.
    The problem that the invention proposes to solve is therefore that of developing a compostable cover for closing a capsule, in particular a capsule containing coffee which meets the conditions of use of this type of seal in coffee machines, especially coffee machines with individual pods or capsules, in particular resistance to humidity, resistance to pressure exerted by the mixture of powder and water, absence of delamination, filter properties prohibiting the passage of coffee in the cup at the time of brewing.
    Another problem which the invention proposes to solve is also that of developing a cover which can be integrated into the current production lines for capsules without substantial modification of said chains.
    An additional problem which the invention proposes to solve is that of developing a seal which is a barrier to aromas.
    STATEMENT OF THE INVENTION
    To do this, the Applicant has developed a seal comprising 2 layers, respectively a nonwoven based on polylactic acid fibers (PLA) and a film of specific thickness based on polyhydroxyalkanoate polymer (PHA) other than PLA. The seal thus obtained is resistant to pressure, humidity and can be easily integrated into existing capsule production lines. It also has a satisfactory flavor barrier.
    More specifically, the subject of the invention is a compostable cover intended for sealing a beverage capsule containing coffee for example, consisting of a multilayer complex comprising at least:
    a nonwoven comprising biodegradable fibers, at least 50% by weight of which are polylactic acid (PLA) fibers, a film comprising a polyhydroxyalkanoate polymer (PHA) other than PLA, the film having a thickness of between 50 μm and less than or equal to 300 pm.
    According to a first characteristic, the cover according to the invention comprises a nonwoven comprising fibers, of which at least 50% by weight, advantageously 80% by weight, preferably 100% by weight, is composed of fibers based on polylactic acid. (PLA).
    Polylactic acid (PLA) has the particular advantage of being biobased, biodegradable and compostable. In the following description and claims, the terms polylactic acid and PLA denote a thermoplastic, renewable, biodegradable aliphatic polyester formed from lactic acid or from a source of lactic acid, such as for example starch. corn, sugar cane, etc. The term PLA can designate all stereoisomeric forms of PLA, of the L- or D type, and their racemic mixture. For example, PLA can include D-polylactic acid, L-polylactic acid (also known as PLLA), D, L-polylactic acid, meso polylactic acid, as well as any combination of D-polylactic acid, L-polylactic acid, D acid, L-polylactic and meso-polylactic acid. PLA can have, for example, a number average molecular weight of between about 15,000 and about 300,000. In the preparation of PLA, bacterial fermentation can be used to produce lactic acid, which can be oligomerized and then dimerized catalytically to provide the monomer for ring opening polymerization. PLA can thus be prepared with a high molecular weight by ring-opening polymerization of the monomer using, for example, a stannous octanoate catalyst, tin (II) chloride, etc.
    According to the invention, where appropriate, the 100% fiber supplement consists of biodegradable fibers.
    In the following description and in the claims, the expression biodegradable fibers means that the fibers can be decomposed into organic substances by living organisms, such as microorganisms.
    The biodegradable fibers are advantageously chosen from the group comprising fibers of polyethylene (PE), polypropylene (PP), polybutane (PB), starch-based polymers, cellulose-based polymers, ethylene polymers -vinyl alcohol (EVOH), polybutanediolsuccinic acid (PBS), bio-based cellulose fibers chosen from the group comprising cotton, wood fibers, flax fibers.
    The term cellulose-based polymer refers to a polymer, or a combination of polymers, which can be derived or prepared from, from cellulose. The cellulose-based polymers which can be used in the embodiments of the present invention can comprise, for example, cellulose esters such as cellulose formate, cellulose acetate, cellulose diacetate, cellulose propionate, butyrate cellulose, cellulose valerate, and mixtures thereof.
    In a preferred embodiment, the fibers consist exclusively of fibers based on polylactic acid (PLA).
    Advantageously, at least 40% by weight of the fibers are heat-sealable fibers. The heat-sealable fibers preferably have a melting point of at least 100 ° C.
    Generally, a nonwoven is a material obtained by random arrangement of individual fibers which are intertwined. The cohesion of the fibers between them can be ensured by the addition of adhesive or binders (latex, polyvinyl alcohol, starch, etc.), by heating, by pressure, or by needling, for example. Many processes for preparing nonwovens are part of the general knowledge of a person skilled in the art. They include, for example, meltblowing, direct spinning or spunbonding, carding, and jet spraying processes. air ("air laying"), or dispersion by water jet ("water laying").
    In addition to fibers, the nonwoven can therefore also include additives, mineral fillers. The incorporation of additives, or fillers, or fibers other than those of PLA can make it possible to modulate the melting point of the nonwoven based on PLA.
    In practice, the nonwoven comprises at least 85%, more preferably at least 90% by weight of fibers.
    In an advantageous embodiment, the cohesion of the fibers, and therefore of the nonwoven, is obtained in the absence of adhesive or binder by a molten manufacturing process ("spunbond").
    Under these conditions, the nonwoven comprises 100% by weight of fibers, of which at least 50% by weight, advantageously 100% by weight preferably consist of PLA fibers.
    The nonwoven can be monolayer. Advantageously, it can be a two-layer nonwoven. The bilayer can be monocomponent, that is to say contain only one type of PLA or bicomponent, that is to say contain 2 types of PLA having different melting points.
    In a particular embodiment, the PLA fibers have a core / shell structure, that is to say that the fibers are two-component fibers. In practice, the fibers comprise a core containing polylactic acid (PLA-1) coated with an envelope or a sheath containing polylactic acid (PLA-2). The core has a diameter dl, and the sheath has a radial thickness el. The ratio of the diameter dl to the radial thickness el can be modified to vary the properties of the fibers. In practice, the PLA1 of the core is a copolymer of lactic acid monomer L1 and of lactic acid monomer DL The PLA-2 of the sheath is a copolymer of lactic acid monomer L2 and of acid monomer lactic D2, whose level of monomer D2 is higher than the level of monomers D1 of PLA-1. The core may also contain a polymeric plasticizer.
    According to another advantageous characteristic, the nonwoven has an internal face and an external face, the internal face having a melting point lower than that of the external face, the internal face being intended to be positioned opposite the film comprising a polyhydroxyalkanoate polymer. (PHA).
    The air permeability of the nonwoven measured according to DIN 53887 is advantageously between 3000 to 5000 l / m 2 / s.
    The nonwoven based on PLA fibers advantageously has a thickness of between 20 and 30 micrometers.
    Finally and in practice, the grammage of the nonwoven is between 5 and 100 g / m 2 , advantageously between 10 and 30 g / m 2 , even more advantageously between 15 and 20 g / m 2 , preferably of the order of 18 g / m 2 .
    According to another characteristic, the multilayer complex further comprises a film comprising a polyhydroxyalkanoate (PHA) polymer other than PLA. According to the invention, the film has a thickness of between 50 μm and 300 μm.
    In the following description and in the claims, the term polyhydroxyalkanoate (PHA) generally designates renewable thermoplastic aliphatic polyesters which can be produced by polymerization of aliphatic hydroxy acid monomers (including dimers of aliphatic hydroxy acids), by fermentation bacterial starch, sugars, lipids, etc. PHAs can include one or more poly-beta-hydroxybutyrate (PHB) (also known as poly-3hydroxybutyrate), poly-alpha-hydroxybutyrate (also known as poly-2hydroxybutyrate), poly-3-hydroxypropionate, poly-3-hydroxyvalerate, poly (3hydroxybutyrate-co-3-hydroxyhexanoate) (ΡΗΒΗ), poly-4-hydroxybutyrate, poly-4hydroxyvalerate, poly-5-hydroxyvalerate, poly-3-hydroxyhexanoate, poly-4hydroxyhexanoate, poly-6- hydroxyhexanoate, polyhydroxybutyrate-valerate (PHBV), polyglycolic acid, polylactic acid (PLA), etc., including copolymers, blends, and combinations, etc., of different PHA polymers, etc. PHAs can be synthesized by methods described, for example, in US 7,267,794, US 7,276,361.
    In an advantageous embodiment, the PHA is poly (3-hydroxybutyrate-co-3hydroxyhexanoate) (PHBH).
    In practice, the film based on polyhydroxyalkanoate polymer (PHA), in particular PHBH, is extruded via a flat die and drawn as well as calendered.
    According to the invention, the film has a thickness of between 50 μm and 300 μm. When the film thickness is less than 50 µm, the seal does not resist the pressure enough and the flow begins before the coffee is correctly extracted. Furthermore, in the case where the film has a thickness of less than 50 μm, the cover is not rigid enough and the perforations can tear, which, as seen previously, is not acceptable. When the thickness of the film is greater than 300 μm, the cover resists too much pressure and poor or even no flow of coffee is observed. Furthermore, in the case where the film has a thickness greater than 300 μm, the cover is too rigid and the perforation thereof is not optimal, which results in poor coffee flow.
    Advantageously, the film has a thickness greater than or equal to 100 μm and less than or equal to 200 μm, even more advantageously greater than or equal to 125 μm and less than or equal to 200 μm.
    In addition to PHA, the film may include additives, such as mineral fillers in particular.
    In practice, the PHA represents between 80 and 98% by weight of the film, advantageously between 90 and 95% by weight.
    Advantageously, the grammage of the film comprising the PHA polymer is between 150 and 500 g / m 2 , advantageously between 200 and 300 g / m 2 , preferably of the order of 240 g / m 2 .
    According to the invention, the film comprising the PHA polymer is associated with the nonwoven by thermal bonding, in particular by hot calendering or hot pressing. On a pilot machine, the temperature conditions are between 110 and 150 ° C, advantageously between 120 and 145 ° C. The pressure applied is between 130 and 230 kN, advantageously of the order of 150 to 200 kN. The speed is between 4 and 7 m / s, preferably around 5.5 m / s.
    In a particular embodiment, the cover consists exclusively of the nonwoven comprising fibers based on polylactic acid (PLA) and of the film comprising a polyhydroxyalkanoate polymer (PHA) other than PLA.
    The thickness of the multilayer complex, object of the invention, is typically between 110 and 310 micrometers, and advantageously between 150 and 200 micrometers.
    According to an additional characteristic, the cover is compostable and thus meets the standard EN 13432.
    The invention also relates to a drink capsule provided with a compostable cover, as previously described. In a particular embodiment, the capsule contains coffee.
    In a preferred embodiment, the capsule itself is made of PHA / PLA or a PHA compatible material. This has the advantage of being able to secure the seal on the capsule by heat sealing the nonwoven part of the seal as long as the materials are compatible (PHA or PHA compatible). The so-called “compatible PHA” materials correspond to a mixture of PHA and vegetable fibers. In practice, heat sealing is carried out by ultrasound.
    Preferably, the beverage capsule is used in an individual beverage machine.
    Advantageously, the drink capsule is compostable and meets the standard EN 13432.
    The invention also relates to the use of the compostable seal as described above for sealing a drink capsule, in particular of coffee. To do this and according to another aspect, the nonwoven is applied to the surface of the capsule facing the lid.
    The invention also relates to the process for manufacturing this capsule, which comprises the following steps:
    - a strip of a multilayer complex is formed comprising successively:
    a nonwoven comprising fibers, at least 50% by weight of which is composed of fibers based on polylactic acid (PLA), a film comprising a polyhydroxyalkanoate polymer (PHA) other than PLA, the film having a thickness of between 50 pm and 300 pm,
    - in parallel, the cells formed in a tray are filled by means of individual capsules containing coffee in particular, the strip is superimposed on the tray, so that the nonwoven is facing the tray,
    - the strip is cut to the right of each of the capsules to form lids,
    - the lids are heat sealed on the capsules.
    According to the method, the heat sealing is carried out by ultrasound.
    The invention and the advantages which ensue therefrom will emerge more clearly from the following figures and examples given in order to illustrate the invention and not in a limiting manner.
    DESCRIPTION OF THE FIGURES
    Figure 1 illustrates the cover object of the present invention.
    FIG. 2 is a representation of a beverage capsule comprising a cover according to the invention.
    EXAMPLES OF EMBODIMENT OF THE INVENTION
    In FIG. 1, a cover is represented in the form of a multilayer complex comprising successively:
    a film 1 comprising a PHBH polymer, the film having a thickness of 200 µm;
    a nonwoven 2 comprising 100% by weight of fibers made of PLA.
    The nonwoven 2 is formed exclusively of PLA fibers. PLA fibers are single-component. The nonwoven is produced by melt (“spunbond”). The thickness of the nonwoven is 20 µm.
    The nonwoven and the film are combined by hot calendering under conditions such that the side having the lowest melting point of the nonwoven is facing the film.
    The cover shown in FIG. 1 is then heat-sealed by ultrasound on a capsule filled with ground coffee and essentially consisting of compostable polymers based on PHA. The capsules thus obtained generate a flow of coffee within the time required by the manufacturers, all accompanied by a foam of quality equivalent to current capsules. The capsule thus produced meets the EN 13432 compostability standard.
    Figure 2 shows a capsule whose shape is adapted to the cover of the invention. This type of shape is representative of the capsules generally used and described, without limitation, in documents US 7,153,530 and 7,658,141 with regard to Nespresso® capsules, US 7,543,527, EP 2,690,035 Bl, EP 1,659,909 Bl and / or EP 2,648,579 Bl. Consequently, the capsule of FIG. 2 may optionally include one or more characteristics described in these documents, in combination with the cover of the present invention.
    The capsule 30 generally comprises a body 4. The body 4 comprises a side wall 5 and a bottom 6 defining a central volume 7. The side wall 4 can be cylindrical, conical, frustoconical, etc. The side wall includes a flange 8 extending radially outwards from the longitudinal axis 9 of the cover 10 and of the capsule 3. The flange 8 comprises a lower face 14 and an upper face 13.
    The capsule can be used in both directions, that is to say when the cover 10 is at the top of the capsule during the brewing and extraction operations) and conversely, when the cover (10 ) is at the base of the capsule during the brewing and extraction operations). In certain applications, the bottom 6 of the capsule may also include a second cover in accordance with the present invention, which can be pierced in the same manner as the cover 10.
    The capsule 3 can comprise one or more means of filtration and / or of distribution of the contents of the capsule. Although not shown, the filter material may partially or completely cover the upper face of the flange. In other embodiments also not shown, the filtering material can be fixed on the bottom of the capsule 3 or on the lower face 14 of the cover 10.
    In practice, the capsule body 4 is manufactured and it is filled with a food (for example ground coffee, tea leaves, a mixture of hot chocolate, etc.). The cover 10 is then fixed on the capsule 3. Most of the time, the lower face 11 of the cover 10 is fixed on the upper face 12 of the rim 8 of the capsule body 4.
    The cover 10 is heat sealed to the capsule 3, so that the nonwoven 2 is in contact with the capsule 3. In other embodiments, the cover 10 can be sealed to the capsule 3 via adhesive, laser welding, ultrasonic welding or other known methods.
    Moisture barrier assessment
    In this example, the moisture barrier performance of the cover of the invention according to FIG. 1 is compared with a cover as described in document FR 3 050 725. This second cover consists of a paper support genuine greaseproof, an adhesive layer and a PLA nonwoven (counterexample).
    The rate of humidity transmission through these two lids is measured at 23 ° C at a relative humidity of 50%.
    The moisture transmission rate through the cover according to the invention is 7g / m 2 .day +/- 2g / m 2 .day. The rate of humidity transmission through the cover according to FR 3 050 725 is 85g / m 2 .day +/- 2g / m 2 .day.
    Thus, the seal according to the invention makes it possible to reduce the rate of transmission of humidity by almost 92%.
    Evaluation of the aromatic barrier
    In this example, we reproduce the seal in Figure 1.
    Five capsules containing ground coffee were closed with each of the covers (samples 200a, 200b, 200c, 200d, 200e and 200f).
    The capsules thus obtained were placed in jars. The jars were then sealed. After a given period of time, the jars are opened and the odor emitted during opening is measured in an olfactory manner.
    The first jar is opened after 15 days and the 200a sample has no odor or a very weak odor. Fifteen days after the opening of the first jar, the second jar is opened. Sample 200b has no odor or a very weak odor. One month after opening the first jar, the third jar is opened. Sample 200c has a very faint odor. Two months after opening the first jar, the fourth jar is opened. Sample 200d has a very weak odor. Three months after opening the first jar, the fifth jar is opened. The 200th sample gives off a weak odor.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Compostable cover intended to seal a beverage capsule, consisting of a multilayer complex comprising at least:
    - a nonwoven comprising fibers, at least 50% by weight of which is composed of fibers based on polylactic acid (PLA),
    - a film comprising a polyhydroxyalkanoate (PHA) polymer other than PLA.
    [2" id="c-fr-0002]
    2. Lid according to claim 1, characterized in that the film has a thickness between 50 uni and 300 μηι.
    [3" id="c-fr-0003]
    3. Lid according to claim 1, characterized in that the complement to 100% of constituent fibers of the nonwoven is composed of biodegradable fibers chosen from the group comprising fibers of polyethylene (PE), polypropylene (PP), polybutane ( PB), starch-based polymers, cellulose-based polymers, ethylene vinyl alcohol polymers (EVOH), polybutanediolsuccinic acid (PBS), bio-based cellulose fibers selected from the group comprising cotton, wood fibers, flax fibers.
    [4" id="c-fr-0004]
    4. Lid according to claim 1, characterized in that the constituent fibers of the nonwoven are exclusively fibers based on polylactic acid (PLA)
    [5" id="c-fr-0005]
    5. Lid according to one of the preceding claims, characterized in that at least 40% of the constituent fibers of the nonwoven are heat-sealable and advantageously have a melting point of at least 100 ° C.
    [6" id="c-fr-0006]
    6. Lid according to one of the preceding claims, characterized in that the nonwoven comprises at least 85%, more preferably at least 90% by weight of fibers. 7
    [7" id="c-fr-0007]
    7. Lid according to one of the preceding claims, characterized in that the grammage of the nonwoven is between 5 and 100 g / m, advantageously between 10 and 30 g / m, even more advantageously between 15 and 20 g / m 2 , preferably around 18 g / m 2 .
    [8" id="c-fr-0008]
    8. Lid according to one of the preceding claims, characterized in that the nonwoven has an internal face and an external face, the internal face having a melting point lower than that of the external face, the internal face being intended to be positioned opposite the film comprising a polyhydroxyalkanoate polymer (PHA).
    [9" id="c-fr-0009]
    9. Lid according to one of the preceding claims, characterized in that the PHA polymer represents between 80 and 98% by weight of the film, advantageously between 90 and 95% by weight.
    [10" id="c-fr-0010]
    10. Lid according to one of the preceding claims, characterized in that the film comprising a polyhydroxyalkanoate polymer (PHA) has a thickness between 100 and 200 μm.
    [11" id="c-fr-0011]
    11. Lid according to one of the preceding claims, characterized in that the film comprising a polyhydroxyalkanoate polymer (PHA) has a basis weight between 150 and 500 g / m 2 , advantageously between 20 and 300 g / m 2 , preferably of around 240g / m 2 .
    [12" id="c-fr-0012]
    12. Lid according to one of the preceding claims, characterized in that it consists of a multilayer complex itself consisting:
    - a nonwoven comprising fibers, at least 50% by weight of which is composed of fibers based on polylactic acid (PLA),
    - a film comprising a polyhydroxyalkanoate (PHA) polymer other than PLA, the film having a thickness greater than or equal to 50 μm and less than or equal to 300 μm.
    [13" id="c-fr-0013]
    13. Beverage capsule, especially coffee, comprising a seal according to one of claims 1 to 12.
    [14" id="c-fr-0014]
    14. Capsule according to claim 13, characterized in that the capsule itself is made of PHA / PLA polymer
    [15" id="c-fr-0015]
    15. Use of the capsule according to one of claims 13 to 14 in an individual beverage machine.
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    JP2022511917A|2022-02-01|Food or beverage preparation capsules with a displaceable membrane to engage with the opening means
    FR3110900A1|2021-12-03|BIODEGRADABLE CAPSULES
    EP2774757A1|2014-09-10|Disposable laminated product
    WO2016139553A1|2016-09-09|Cartridge for the preparation of liquid products
    同族专利:
    公开号 | 公开日
    CN112638640A|2021-04-09|
    WO2020049029A1|2020-03-12|
    EP3847014A1|2021-07-14|
    CA3110761A1|2020-03-12|
    US20210347547A1|2021-11-11|
    FR3085301B1|2020-09-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US7267794B2|1998-09-04|2007-09-11|Amick Darryl D|Ductile medium-and high-density, non-toxic shot and other articles and method for producing the same|
    US7153530B2|2000-09-26|2006-12-26|Nestec S.A.|Closed cartridge for preparing a beverage for extraction under pressure|
    US7658141B2|2000-09-26|2010-02-09|Nestec S.A.|Closed cartridge for preparing a beverage for extraction under pressure|
    US7276361B2|2001-12-10|2007-10-02|Riken|Method for producing biodegradable polyester|
    US7543527B2|2002-03-14|2009-06-09|Caffita System Spa|Cartridge containing a single serving of a particulate substance for preparing a beverage|
    EP1659909B1|2003-08-25|2008-10-15|Nestec S.A.|Method and assembly for the preparation of a food product|
    US8956672B2|2009-03-19|2015-02-17|Nestec S.A.|Capsule for preparing coffee in a device comprising a cartridge holder with relief and recessed elements|
    US20120097602A1|2010-10-22|2012-04-26|International Paper Company|Biodegradable or compostable beverage filter cartridge|
    EP2648579B1|2010-12-10|2015-01-28|Luigi Lavazza S.p.A.|Cartridge for preparing a liquid product|
    WO2013178870A1|2012-05-31|2013-12-05|Ahlstrom Corporation|Multilayer article comprising a biodegradable polymer-based layer and a cellulose-fiber based support; method of manufacturing multilayer article and food accessory comprising a multilayer article|
    EP2690035A1|2012-07-23|2014-01-29|Brain Corp S.A.|Capsule for preparing a beverage such as coffee capsule|
    EP2690035B1|2012-07-23|2016-08-10|Brain Corp S.A.|Capsule for preparing a beverage such as a coffee capsule|
    WO2017063680A1|2015-10-13|2017-04-20|Biserkon Holdings Ltd.|Capsule and device for preparing beverages and method for manufacturing a capsule|
    WO2017187024A1|2016-04-29|2017-11-02|Ahlstrom-Munksjö Oyj|Compostable lid intended to seal a capsule and a capsule sealed by the lid|
    FR3050725A1|2016-04-29|2017-11-03|Ahlstroem Oy|COMPOSTABLE OPERATOR FOR CAPTURING CAPSULE AND CAPSULE OBSTRUCTED BY THE OPERCULE|
    FR3057556A3|2016-10-19|2018-04-20|Ahlstroem Oy|USE OF A POLYLACTIC ACID NON-WOVEN FIBER AS A DOSAGE FILTER IN A PERCOLATION MACHINE|GB2584610A|2019-05-07|2020-12-16|Alex Gort Barten|Beverage capsule|
    FR3109932A1|2020-05-06|2021-11-12|My Tea Cup Ag|BIODEGRADABLE CAPSULES|
    法律状态:
    2019-09-27| PLFP| Fee payment|Year of fee payment: 2 |
    2020-03-06| PLSC| Publication of the preliminary search report|Effective date: 20200306 |
    2020-09-29| PLFP| Fee payment|Year of fee payment: 3 |
    2020-10-23| TP| Transmission of property|Owner name: AHLSTROM-MUNKSJO OYJ, FI Effective date: 20200911 |
    2021-08-31| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1857921A|FR3085301B1|2018-09-04|2018-09-04|COMPOSTABLE CAPSULE INTENDED TO CLOSE A CAPSULE AND CAPSULE CLOSED BY THE OPERCULE|
    FR1857921|2018-09-04|FR1857921A| FR3085301B1|2018-09-04|2018-09-04|COMPOSTABLE CAPSULE INTENDED TO CLOSE A CAPSULE AND CAPSULE CLOSED BY THE OPERCULE|
    CN201980057559.9A| CN112638640A|2018-09-04|2019-09-04|Compostable lid for sealing capsules and capsules sealed by the lid|
    CA3110761A| CA3110761A1|2018-09-04|2019-09-04|Compostable lid for sealing a capsule and a capsule sealed by the lid|
    US17/273,327| US20210347547A1|2018-09-04|2019-09-04|Compostable lid for sealing a capsule and a capsule sealed by the lid|
    EP19761878.8A| EP3847014A1|2018-09-04|2019-09-04|Compostable lid for sealing a capsule and a capsule sealed by the lid|
    PCT/EP2019/073552| WO2020049029A1|2018-09-04|2019-09-04|Compostable lid for sealing a capsule and a capsule sealed by the lid|
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