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
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
  • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
  • B65D81/263—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for ventilating the contents
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
  • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
  • A23L5/10—General methods of cooking foods, e.g. by roasting or frying
• • 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
  • 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
  • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D65/38—Packaging materials of special type or form
  • B65D65/46—Applications of disintegrable, dissolvable or edible materials
  • B65D65/466—Bio- or photodegradable packaging materials
• • 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
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
  • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
  • B65D81/264—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing liquids
• • 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
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
  • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
  • B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
  • B65D81/267—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being in sheet form
• • 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
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
  • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
• • 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
  • B29C2045/1486—Details, accessories and auxiliary operations
  • B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
  • B29C2045/14918—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling
• • 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
  • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
• • 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
• • 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
  • B29K2601/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, for preformed parts, e.g. for inserts
• • 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
  • B29K2701/00—Use of unspecified macromolecular compounds for preformed parts, e.g. for inserts
  • B29K2701/12—Thermoplastic materials
• • 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
  • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
  • B29K2711/12—Paper, e.g. cardboard
• • 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
  • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
  • B29K2995/0037—Other properties
  • B29K2995/0059—Degradable
  • B29K2995/006—Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
• • 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
  • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D2565/38—Packaging materials of special type or form
  • B65D2565/381—Details of packaging materials of special type or form
  • B65D2565/385—Details of packaging materials of special type or form especially suited for or with means facilitating recycling
• • 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

• the present invention relates to the field of biodegradable articles.
• the present invention refers to a package, such as a lightweight biodegradable tray, to its manufacturing process, as well as to its uses.
• the packaging according to the invention may especially be useful in the agricultural field for the transport of vegetables, fruits or plants, or in the field of food for the packaging of foodstuff (meat, cheese, fish) or dish cooking.
• biodegradable packaging such as trays used for packaging, storage and / or transport of foodstuffs, are in full development and are gradually replacing plastic packaging. not biodegradable.
• trays made of a polylactic acid (PLA) material In this field, it is for example known to use trays made of a polylactic acid (PLA) material. This material is used either pure or mixed with other biodegradable materials.
• PLA polylactic acid
• biodegradable materials including PLA
• they do not form a barrier to gases, for example oxygen.
• gases for example oxygen.
• a film usually non-biodegradable, is used.
• the tray is made in particular of a multilayer material composed of a first layer of agromaterial, a second layer of paper and a third layer of biodegradable resin, the paper layer being sandwiched between the first layer of agromaterial and the third layer of resin.
• this tray has the disadvantage of having a fairly large weight that can generate relatively high manufacturing costs.
• EP 2 835 320 discloses a package comprising a container optionally provided with a lid.
• the container is formed of a rigid frame consisting of plastic ribs forming the bottom and the four walls of the package. Each of the walls may comprise additional ribs, called reinforcement ribs.
• the bottom and the four walls are formed by different layers of paper or cardboard. According to a first embodiment, the different layers of paper or cardboard forming the bottom and the walls of the package are inserted into an injection mold, then plastic is injected to form the rigid frame (ribs). According to a second embodiment, the plastic material is injected into the mold to form the rigid frame, then the different layers of paper or cardboard are positioned between the ribs when they are still in the tacky state resulting from the injection process.
• the packaging described in this document has the disadvantage of being difficult to implement.
• the first embodiment it does not seem possible to adhere / glue the cardboard layers during the injection step of the rigid frame, these being too thick.
• the corner areas of the rigid frame being formed by ribs, it thus seems not possible to be able to demold the workpiece after the injection step, particularly because of the undercuts inherent to the injection.
• the second embodiment seems hardly feasible on an industrial scale or requires specific injection machines.
• DE 20 2016 103684 discloses a wicker basket comprising a bottom from which extends a wall which includes openings.
• a hemispherical container is adapted to be positioned inside the wicker basket.
• the document LU 49 758 describes a crate for packing salads and garden produce. It comprises a cage carcass adapted to receive a box of plastic sheet.
• An object of the present invention is thus to propose a new packaging which avoids, at least in part, the aforementioned drawbacks.
• the present invention provides a technical solution to the problems identified above.
• the present invention provides a biodegradable package comprising:
• a biodegradable carrier comprising a bottom from the edge of which rises a wall, so as to define an inner face adapted to contain an article, such as a foodstuff or a plant;
• said biodegradable support comprises one or more openings arranged on the bottom and / or the wall, said biodegradable film being positioned on said inner face of said biodegradable support so as to sealing at least said apertures and in that said biodegradable film is positioned on said biodegradable support by the technique of molding labeling.
• the technique of molding labeling comes from the English "In Mold Labeling", hereinafter also called IML.
• the Applicant has in fact surprisingly discovered that the combination of a biodegradable support having openings, namely recessed areas, and a biodegradable film capable of closing off the openings, made it possible to produce a package presenting at the same time a lighter weight and good mechanical properties.
• the package according to the invention is able to transport, package or store foodstuffs (meat, vegetables or fruits) or plants (for example, it can be used as a flower pot). It is also suitable for forming capsules, such as coffee capsules.
• biodegradable is a compound, packaging, film that can under the action of biological organisms (bacteria, fungi, algae ...) in a favorable environment (temperature conditions, d humidity, light, oxygen, etc.), moisture, oxygen and heat, decompose, degrade, and become bio-assimilable.
• the The result of this degradation is the formation of water, CO2 (carbon dioxide) and / or methane and possibly by-products (residues, new biomass), which is not toxic for the environment (definition based on the European standard EN NF 13432 of 2001 on requirements for packagings upgraded by composting and biodegradation.)
• This property is measured by standard and standardized tests (ISO 14855 of 2005: biodegradability under controlled composting conditions).
• ISO 14855 of 2005 biodegradability under controlled composting conditions.
• a material to be considered biodegradable it must be able to reach 90% biodegradation in less than 6 months (standard NF EN 13432 of 2001).
• biodegradable film any flat biodegradable support having a thickness ranging from 10 ⁇ to 300 ⁇ , preferably from 10 ⁇ to 200 ⁇ , in particular from 30 to 150 ⁇ , which may for example be presented under leaf shape.
• a biodegradable film according to the invention will be described below.
• biodegradable packaging according to the invention meets the NF T51800 (2015) standard for domestic compostable plastic.
• the biodegradable film has a thickness less than or equal to 0.3 mm, preferably less than or equal to 0.2 mm and typically less than or equal to 0.1 mm, while the biodegradable support (forming the bottom and the wall of the package) has a thickness ranging from 0.3 mm to 2 mm, preferably ranging from 0.5 mm to 1.5 mm and typically from 0.6 mm to 1.3 mm.
• the packaging according to the invention thus has a certain advantage over the many biodegradable packaging available on the market that does not meet this standard NF T51800 (2015), especially because they are formed by a too thick film ( thickness greater than 0.3 mm).
• the biodegradable support is made of a biodegradable agromaterial, a biodegradable thermoplastic polymer or a mixture thereof;
• biodegradable film is watertight and / or capable of forming a gas barrier
• said biodegradable film is composed of at least one layer based on cellulose, such as paper such as kraft paper or parchment paper;
• said biodegradable film is composed of at least one layer based on at least one resin or based on at least one biodegradable thermoplastic polymer;
• said biodegradable film is a multilayered biodegradable film comprising a first cellulose-based layer and a second layer based on at least one resin or based on at least one biodegradable thermoplastic polymer;
• said cellulose-based layer rests at least partially on said layer based on at least one resin or based on at least one biodegradable thermoplastic polymer, which itself rests on the biodegradable support, preferably the second layer based on at least one resin or based on at least one biodegradable thermoplastic polymer is sandwiched between the biodegradable support and the first cellulose-based layer;
• the biodegradable thermoplastic polymer that can make up the biodegradable film or the biodegradable support is chosen from: poly (glycolic acid); poly (lactide) (PLA), poly (lactic acid) (PLA) and its copolymers; poly (caprolactone) (PCL); poly (hydroxyalkanoate) s (PHA) such as poly (hydroxy butyrate) (PHB) or poly (hydroxybutyrate co-valerate) (PHBV); poly (ethylene adipate) (PEA); poly (ethylene succinate) (PES); poly (butylene succinate) (PBS); poly (butylene adipate) (PBA); poly (butylene adipate-co-terephthalate) (PBAT); poly (butylene succinate co-adipate) (PBSA) or a mixture thereof;
• the biodegradable thermoplastic polymer forming the biodegradable film is preferably a bi-oriented PLA
• the resin is chosen from: a polyester, a silicone or a mixture thereof;
• the packaging is sealable.
• the invention also proposes a method of producing a package as described above implemented in a labeling injection device.
• molding (IML) in a mold having a first portion and a second portion the method comprising the steps of:
• said biodegradable film comprises: a cellulose-based layer, such as paper such as kraft paper or parchment paper; or
• the layer based on at least one thermoplastic polymer comprises at least one polymer chosen from a PLA, such as a bi-oriented PLA and / or the resin-based layer comprises at least one resin chosen from: a polyester , a silicone or a mixture thereof.
• step (d) which is the following:
• the invention thus also refers to the use of the aforementioned packaging for the packaging, storage or transport of foodstuffs, such as fruits, vegetables, meats and / or plants and / or capsule making, such as coffee capsules.
• the invention relates to the use of the packaging described above for cooking foodstuffs.
• FIG. 1 is a schematic representation of a biodegradable packaging support according to a first embodiment of the present invention wherein only the bottom of the package comprises openings;
• FIG. 2 is a schematic representation of the packaging carrier illustrated in Figure 1 further comprising a biodegradable film covering the bottom of the support;
• FIG. 3 is a cross section along the axis AA 'of Figure 2 showing the positioning of the biodegradable film relative to the support of the package;
• FIG. 4 is a schematic representation of a biodegradable packaging support according to a second embodiment of the present invention in which the bottom, as well as the wall of the package, comprise openings;
• FIG. 5 is a photograph of the package according to the second embodiment illustrated in Figure 4 showing in particular an angle of the package according to the invention
• FIG. 6 is a schematic representation of: (a) the biodegradable film according to the invention before being inserted into an injection mold by the IML molding technique, (b) the biodegradable support according to the invention; without the biofilm, and (c) the package according to the invention, namely comprising a biodegradable support whose inner surface is covered with the biodegradable film; and
• FIG. 7 (a) to (c) are photographs showing a "control" package made according to the IML Molding Labeling technique, the control package comprises a support having apertures and a film which conforms to the inner surface of the support so as to close the openings, the support and the film are made of polypropylene (PP);
• PP polypropylene
• FIG. 8 (a) to (c) are photographs showing a packaging according to the invention produced according to the technique of the labeling on the molding, the packaging according to the invention has the same structure as the control packaging of the Figure 7, except that the support and the film are made of PLA.
• This package 10 is particularly suitable for packaging, storing foodstuffs (fresh, freeze-dried or frozen) or for cooking these foodstuffs directly in the package 10.
• the package 10 can also be useful in the agricultural field for the preparation and conditioning of plants to produce flower pots for example.
• the package 10 comprises first a biodegradable support 1 comprising a bottom 2 from the edge of which rises a wall 3, so as to define an inner face.
• this inner face corresponds to the surface of the bottom 2 and the surface of the side wall 3 facing the inside of the package 10.
• This inner face itself delimits the interior space of the package 10 adapted to receive an item, such as a food or plant.
• the wall 3 is slightly flared.
• the wall 3 ends preferably with a border 4.
• This border 4 can serve as a support for closing the package 10 with a suitable material depending on the desired use for said packaging (cooking, etc.).
• the package 10 is sealable and a film (not shown in the figures) is able to be thermo-sealed on the edge 4 so as to close / cover, generally hermetically, the interior space of the 10.
• the biodegradable support 1 is rigid enough to endure a lidding step of this film in a heat-sealing machine.
• it is capable of withstanding a pressure ranging from 0 bar to 3 bar, preferably from 0.5 bar to 2.5 bar and typically from 0.7 bar to 2.2 bar.
• a film capable of being heat-sealed is well known to those skilled in the art; it is for example conventionally used in the field of food trays (prepared dishes) and may for example correspond to a film made of polypropylene (PP).
• the film closing the inner space of the package 10 according to the invention is also biodegradable.
• the biodegradable support 1 thus has the shape of a tray.
• this biodegradable support 1 comprises one or more openings 5. These openings 5 or recessed areas allow in particular to lighten the weight of the package 10.
• the openings 5 can be arranged both on the side wall 3 and on the bottom 2.
• only the wall 3 comprises the openings 5.
• the packaging according to the invention will have one or more openings 5 on both the bottom 2 and the side wall 3.
• the area taken by the opening or openings 5 relative to the total surface of the inner face of the package 10 varies from 1 to 99%, preferably from 50 to 99%, and typically from 70 to 99%.
• the inner surface of the package 10 may be mainly composed by the openings 5. This produces a package of very light weight and also having good mechanical properties.
• a range of values ranging from 1 to 99% includes the following values or any intervals between these values: 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 1 1; 12; 13; 14; 15; 16; 17; 18; 19; 20; 25; 30 ; 35; 40; 45; 50; 55; 60; 65; 70; 75; 80; 85; 86; 87; 88; 89; 90; 91; 92; 93; 94; 95; 96; 97; 98; 99.
• the biodegradable support 1 may be in the form of a symmetrical perforated structure or a symmetrical framework always having a bottom 2 and a wall 3.
• the bottom 2 is formed of a longitudinal rod 22 and a rod transverse 23, which are connected to a peripheral edge 21.
• the bottom 2 also comprises "V" rods 25 which extend from the longitudinal rod 22 or the transverse rod 23.
• the bottom 2 may also comprise at least one reinforcing disc 24 (here 3) at the junctions between the V-shaped rods and the longitudinal rod 22.
• the openings 5 present on the bottom 2 are thus created between the various rods 21, 22 and 25 and the edge 21.
• the wall 3 extends from the peripheral edge 21 to the border 4 of the package and comprises several vertical pillars 26 which connect these two borders 21 and 4.
• the openings 5 of the wall 3 are thus created between the various pillars 26.
• the "V" rods 25 join the peripheral edge 21 of the bottom 2 and end at two vertical bearings 26. This structure has the advantage of having many openings 5 while maintaining good mechanical properties.
• the package 10 also comprises a biodegradable film 6 which is able to fit the inside of the biodegradable support so as to seal at least all the openings 5.
• a film is meant that the film 6 is unique, namely that there is only one film that covers all the openings 5 that may be present on the bottom 2 and / or the wall 3 of the support 1. However, as will be described below, this film 6 may be monolayer or multilayer.
• the biodegradable film 6 covers both the bottom 2 and the inner face of the wall 3 of the biodegradable support 1, in other words the biodegradable film covers the whole of the inner face of the biodegradable support 1.
• the biodegradable support 1 is made of biodegradable agromaterial, biodegradable thermoplastic polymer or a mixture thereof.
• the biodegradable support 1 is thus made of agromaterial.
• agromaterial is meant a material predominantly composed of raw materials of agricultural origin. In particular fibers and natural biopolymers (starch, cellulose %) or synthetic polymers.
• the biodegradable agromaterial may be composed of fibers, starch and optionally an adjuvant (such as for example PLA (English abbreviations of Poly Lactic Acid or in French, polylactic acid) or biodegradable polyesters).
• an adjuvant such as for example PLA (English abbreviations of Poly Lactic Acid or in French, polylactic acid) or biodegradable polyesters).
• the agromaterial used here is preferably composed of more than 90% (on the dry matter) of compounds derived from agro-resources, that is to say from components such as starch, flours, fibers, biodegradable polyesters, etc.
• the proportion of these compounds derived from agroresources can even be preferably 100%, but it can also contain components such as dyes, for example not from agro-resources.
• the biodegradable support 1 has, according to the international standard ISO 527 (2012), a tensile modulus of at least 600 N / mm 2 .
• a tensile modulus measured according to the international standard ISO 527 of at least 600 N / mm 2 comprises the following values or all the ranges between these values: 1500; 1550; 1600; 1650; 1700; 1750; 1800; 1850; 1900; 1950; 2000; 2100; 2200; 2300; 2400; 2500; 3000; 3500; 4000; etc.
• the biodegradable support 1 according to the present invention may have a flexural strength, measured as described in the standard NF EN 310 (1993), of at least 20N / mm 2 and preferably at least 25 N / mm 2 and a flexural modulus of at least 1500 N / mm 2 .
• a flexural strength of at least 20 N / mm 2 comprises the following values or all the ranges between these values: 21; 22; 23; 24; 25; 26; 27; 28; 29; 30 ; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 50; 51; 52; 53; 54; 55; etc.
• the biodegradable support is in agromaterial selected from: polysaccharides (such as potato, corn, wheat or rice starches), proteins (such as casein, collagen, gelatin, gluten) , or a mixture thereof.
• polysaccharides such as potato, corn, wheat or rice starches
• proteins such as casein, collagen, gelatin, gluten
• biodegradable agromaterial that is suitable for producing the biodegradable support 1 according to the invention can be obtained from aggregates, comprising at least (the percentages being expressed by weight relative to the total weight of the dry matter):
• Such agromaterial in the form of aggregates can for example be obtained according to the process mentioned in the document FR 2 783 740.
• the process for preparing these aggregates based on vegetable matter from at least one cereal plant comprises the following steps:
• said fragments can be dried to reach a residual moisture content of between approximately 5 and 20%, preferably ranging from 7 to
• “By aerial part of the plant” means stems, leaves, stalks, grains, husks, but also any other aerial part that may exist, depending on the species and plant varieties.
• the plant material is preferably derived from at least one cereal plant. It may, however, also include material from one or more non-cereal plants.
• the cereal plants that can be used for the implementation of this process can be any cereal plants whose grains contain a sufficient amount of starch, preferably at least 20% of starch by weight of the whole plant.
• they may be maize, durum wheat, soft wheat, sorghum, oats, rye and rice.
• the above-mentioned step (a) may be carried out using either all the previously isolated plant parts of the plant or a substantial fraction of these isolated aerial parts.
• substantial fraction is meant at least 80% by weight of the aerial parts of the plant. It can also be implemented using aerial parts of plants belonging to varieties, or different species.
• the size of the aggregates is measured by passing the aggregates through screens having decreasing diameters.
• aggregates having a size of between 0.5 and 1 mm pass through meshes 1 mm in diameter, but do not pass through meshes having a diameter of 0.5 mm.
• Step b) grinding or shearing can be implemented using a hammer mill equipped with grids having appropriate mesh diameters. It can also be implemented using any other device known to those skilled in the art and resulting in equivalent results.
• Such granules having possibly undergone extrusion, exhibit a behavior comparable to that of a thermoplastic material and can then be injected into a mold.
• the use of such aggregates is quite comparable to that of synthetic plastics such as polyethylene, polypropylene and polystyrene.
• the biodegradable support 1 can be made from at least one biodegradable thermoplastic polymer.
• the biodegradable thermoplastic polymer suitable for forming the biodegradable support 1 may be selected from a biodegradable polyester, such as poly (glycolic acid); poly (lactide) (PLA), poly (lactic acid) (PLA) and its copolymers; poly (caprolactone) (PCL); poly (hydroxyalkanoate) s (PHA) such as poly (hydroxy butyrate) (PHB) or poly (hydroxybutyrate carbonate) (PHBV); poly (ethylene adipate) (PEA); poly (ethylene succinate) (PES); poly (butylene succinate) (PBS); poly (butylene adipate) (PBA); poly (butylene adipate-co-terephthalate) (PBAT); poly (butylene succinate co-adipate) (PBSA) or a mixture thereof.
• a biodegradable polyester such as poly (glycolic acid); poly (lactide) (PLA), poly (lactic acid) (PLA) and its copo
• the biodegradable support 1 is made of PLA.
• PLA is a linear thermoplastic aliphatic polyester; it is produced by several techniques including azeotropic condensation, polymerization by direct condensation, or polymerization by formation of lactide (ring-opening), the most used on an industrial scale. Due to the chiral nature of lactic acid, the stereochemistry of PLA is complex. Since lactic acid exists in two stereoisomeric forms, the dimer obtained from two lactic acids can be in three different enantiomeric forms. Subsequently, PLA can exist in three stereochemical forms: poly (L-lactide) (PLLA), poly (D-lactide) (PDLA), and poly (DL-lactide) (PDLLA).
• PLLA poly (L-lactide)
• PDLA poly (D-lactide)
• PDLLA poly (DL-lactide)
• the copolymers of L-lactide and D-lactide have a lower crystallization than L-lactide homopolymers, thus the variation of the L / D ratio produced by PLA with different properties.
• high stereochemical purity (L- higher) promotes crystallization of the material, those rich in D isomers (15%) are amorphous.
• PLA has a crystallinity of about 37%, a glass transition temperature of 50 to 80 ° C and a melting temperature of 173 to 178 ° C.
• PLA is easily degraded in industrial compost in 3 months or even 6 months at most, unlike conventional plastics, such as PE (polyethylene) and PS (polystyrene) (between 500 and 1000 years).
• PE polyethylene
• PS polystyrene
• the degradation of polymers occurs mainly by cleavage of the main chains or side chains of macromolecules. It is usually induced by thermal activation, hydrolysis, biological activity (enzymes), oxidation, photolysis or radiolysis.
• the biodegradable support 1 according to the invention is resistant to temperatures up to 160 ° C., in particular up to 150 ° C. and typically up to 120 ° C., such as, for example, between 30 ° C and 110 ° C.
• a temperature up to 160 ° C comprises at least the following temperatures or any intervals between them: - 30 ° C; -20 ° C; -10 ° C; -5 ° C; 0 ° C; 20 ° C; 50 ° C; 60 ° C; 70 ° C; 80 ° C; 90 ° C; 100 ° C; 1-10 ° C; 120 ° C; 130 ° C; 140 ° C; 150 ° C, 160 ° C.
• biodegradable carrier 1 may be formed from a mixture of an agromaterial described above with one or more of the aforementioned thermoplastic polymers.
• the thickness of the biodegradable support 1 will depend on the use that one wishes to make of the package 10. Depending on the desired mechanical strength, the biodegradable support 1 will have a greater or lesser thickness.
• the biodegradable support 1 is covered and in particular at least at or of the openings 5 by a biodegradable film 6.
• the biodegradable film 6 comprises a cellulose-based monolayer.
• the cellulose-based layer is paper such as kraft paper, parchment paper, filter paper, nonwoven, cotton or a combination thereof.
• the cellulose layer is made of kraft paper and / or parchment paper.
• the cellulose-based layer has a burst strength of 0.2 to 3 kg / cm 2 .
• kraft paper has the advantage of being very resistant. It is obtained with pasta based on wood treated with soda.
• the wood used generally is softwood, type pine or fir.
• the paper used here can have different weights depending on the use of the multilayer material.
• the kraft paper used has a basis weight of between 40 and 180 g / m 2 .
• the cellulose layer may have a thickness ranging from 10 to 200 ⁇ , preferably from 30 to 150 ⁇ .
• the kraft paper marketed by LEIPA under the reference VKP80 is suitable as a paper membrane according to the present invention.
• the biodegradable film 6 comprises a monolayer based on a resin or based on at least one biodegradable thermoplastic polymer.
• the film may correspond to a monolayer based on at least one resin.
• resin is used here in its broad sense and here designates a solid, semi-solid or pseudo-solid organic material which has a tendency to flow when it is stressed.
• the resin layer may for example also be a polyester (s), a silicone or a mixture thereof.
• the polyester or polyesters suitable for producing the resin layer may be generally chosen from: poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate-co-adipate) (PBSA), poly (Butylene succinate-co-lactide) (BPSL), poly (butylene succinate-co-terephthalate) (PBST), poly (butylene succinate) (PBS), polymers derived from lactic acid (PLA), polycaprolactones (PCL), polyesteramines ( PEA), polyglycolide (PGA), poly (methylene adipate-co-terephthalate) (PTMAT), polyvinyl alcohol, polyhydroxyalkanoate (PHA) or a mixture thereof.
• PBAT poly (butylene adipate-co-terephthalate)
• PBSA poly (butylene succinate-co-adipate)
• BPSL butylene succinate-co-lactide
• PBST poly (butylene succinate-
• a resin suitable for the present invention can be in particular that sold under the trademark NatureFlex ® and sold by Futamura Company.
• the film 6 may correspond to a monolayer based on at least one biodegradable thermoplastic polymer.
• the biodegradable thermoplastic polymer is selected from a biopolymer, a polyester or a mixture thereof.
• a polymer is said to be "biodegradable” according to the invention when it can be decomposed by biological organisms (bacteria, fungi, algae, etc.) in a favorable environment (conditions of temperature, humidity, light, oxygen). , etc.).
• a biodegradable polymer can be derived from renewable resources (poly (hydroxyalkanoate) s, starch, etc.) or non-renewable resources such as poly (caprolactone) (polyester aliphatic).
• the biodegradable thermoplastic polymer according to the invention may be chosen from a biopolymer, namely a polymer extracted from biomass.
• a biopolymer suitable for the present invention can be:
• a protein such as casein, collagen, gelatin, gluten, zein,
• the biodegradable thermoplastic polymer according to the invention may be chosen from a biodegradable polyester obtained for example from microorganisms (by extraction), by conventional synthesis from biomonomers.
• a biodegradable thermoplastic polyester that is suitable in the context of the present invention may be chosen from: poly (glycolic acid); poly (lactide) (PLA), poly (lactic acid) (PLA) and its copolymers; poly (caprolactone) (PCL); poly (hydroxyalkanoate) s (PHA) such as poly (hydroxy butyrate) (PHB) or poly (hydroxybutyrate co-valerate) (PHBV); poly (ethylene adipate) (PEA); poly (ethylene succinate) (PES); poly (butylene succinate) (PBS); poly (butylene adipate) (PBA); poly (butylene adipate-costephthalate) (PBAT); poly (butylene succinate co-adipate) (PBSA) or a mixture thereof.
• PAG poly (glycolic acid); poly (lactide) (PLA), poly (lactic acid) (PLA) and its copolymers; poly (caprolactone) (PCL); poly (hydroxy
• the biodegradable thermoplastic polymer is poly (lactide) (PLA) and is in particular a bi-oriented PLA.
• PLA poly (lactide)
• the bi-oriented PLA generally has thermal properties compared to a conventional PLA (non-oriented).
• bi-oriented PLA differs in particular from a conventional PLA in that it is doubly stretched. It can be manufactured in the following way: longitudinal stretch during extrusion in line, then transverse stretch after recovery.
• a bi-oriented PLA may for example be marketed by TAGHLEEF under the reference D808 or D813.
• thermoplastic polyester suitable for forming the package 10 according to the invention will be poly (lactide), poly (lactic acid) (PLA) and a copolymer thereof, or a poly (lactide) / poly (lactic acid) (PLA) mixture and its copolymers with a poly (hydroxyalkanoate) (PHA).
• PLA poly (lactic acid)
• PHA poly (hydroxyalkanoate)
• the biodegradable film 6 is multilayer and may comprise in particular a first cellulose-based layer 9 as described above and a second layer 8 based on resin or at least one biodegradable thermoplastic polymer, also as described above.
• the second layer 8 of resin or biodegradable thermoplastic polymer is generally positioned between the biodegradable support 1 and the first cellulose-based layer 9.
• the lower face of the biodegradable support 1 bottom and / or wall
• the layer 8 resin or biodegradable thermoplastic polymer which itself is covered (direct contact) in part and generally in its entirety by the cellulose layer 9 (FIG. 3).
• the first layer 9 may be parchment paper and the second layer 8 PLA.
• the cellulose-based layer 9 it is possible for the cellulose-based layer 9 to be "sandwiched" between the biodegradable support 1 and the second layer 8 of resin or biodegradable polymer.
• the lower face of the biodegradable support 1 (bottom and / or wall) is covered (direct contact) partly and generally in its entirety by the cellulose layer 9, which itself is partially covered (direct contact) and generally in its entirety by the layer of resin or biodegradable thermoplastic polymer 8.
• the first layer may be made of kraft paper and the second layer may be silicone-based.
• the Applicant has discovered that the first cellulose layer 9 could adhere perfectly to the biodegradable support 1, such as the biodegradable support agromatériau.
• a second layer 8 of resin or thermoplastic polymer between the biodegradable support 1 and the cellulose layer 9 in general makes it possible to improve the performance of the biodegradable support 1 by rendering it, for example, waterproof. and able to form a gas barrier, which can be useful for the storage of meat, cheese for example or cooked dish.
• This type of film 6 may be a silicone paper.
• the second layer 8 whether of thermoplastic polymer or of resin, serves in particular to reinforce the cellulose-based layer 9. Therefore, when it is present, it is applied to it on the basis of at least 5 g / m 2 , preferably at least 10 g / m 2 , in particular 12 to 25 g / m 2 and typically 15 to 20 g / m 2 .
• At least 5 g / m 2 includes the following values: 5, 6, 7, 8, 9, 10, 1 1, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, etc.
• It has a thickness generally ranging from 5 ⁇ to 40 ⁇ , typically from 10 ⁇ to 30 ⁇ .
• the second layer 8 according to the invention is thus biodegradable and suitable for heat-bonding, thermo-welding the membrane based on cellulose 9 to the biodegradable support 1.
• the first layer 9 may be parchment paper and the second layer 8 is made of PLA.
• a biodegradable film 6 may correspond to the product marketed by Ahlstrom under the reference “top lid O2 barrier for espresso” ref. : SS5961092.
• the first layer 9 may be kraft paper or white paper and the second layer 8 is silicone.
• Such a biodegradable film may correspond to a biodegradable film marketed by MONDI under the reference "Advantage bakery release 1 sC White”.
• thermoplastic polymer and / or the resin of the biodegradable film 6 according to the invention may be additive.
• additives can be:
• thermoplastic material formed conductive on the surface ethoxylated fatty amines, polyhydroxylated polyols are suitable for the additive according to the invention
• anti-shock agents (acrylic, etc.);
• lubricants in order to facilitate the implementation by promoting sliding (such as waxes, calcium stearate, etc.);
• dyes / pigments such as pigments insoluble in the polymer (carbon black, metal oxides, etc.) and organic dyes soluble in the polymer; plasticizers to make the plastic more flexible, more resilient with a lower glass transition temperature (such as sorbitol, polyethylene glycol, glycerol, fatty acid esters, etc.);
• fillers making it possible to reduce the cost of the thermoplastic material, to improve mechanical properties, to obtain a better thermal resistance, etc. as mineral loads (calcium carbonate, silica, talc, clay, carbon black ...); organic fillers (wood flour, cellulose, starch, cereals ...), metallic fillers making it possible to give a conductive character to the matrix) (aluminum, copper, zinc.); and fibrous fillers (glass fibers, hemp fibers, flax fibers, etc.);
• thermoplastic polymer material and in particular of a material based on biodegradable brittle polymers, such as in poly (lactic acid), such as a lipid additive; ;
• thermoplastic polymers or any other constituents that can be used with the thermoplastic polymers, and in the amounts customarily used in the field of the art and known to those skilled in the art.
• thermoplastic material is present in an amount of from 0 to 59.5%, preferably from 10% to 50% by weight relative to the total mass of said thermoplastic material.
• the fillers may represent by way of example 40% by weight relative to the total mass of the thermoplastic material.
• the biodegradable film 6 will be adapted according to the desired use for the packaging.
• the biodegradable film 6 has a constraint according to the international standard ISO 527 (2012), ranging respectively from 40 MPa to 400 MPa, preferably ranging from 45 to 350 MPa and in particular ranging from 50 to 300 MPa, and typically from 55 to at 200 MPa.
• the film 6 according to the invention withstands temperatures up to 160 ° C, and typically up to 130 ° C, such as for example between -30 ° C and 120 ° C.
• biodegradable film 6 or the biodegradable support 1 described here is biodegradable according to standard NF EN 13432 (November 2000).
• the biodegradable packaging 10 according to the invention is thus generally completely recyclable by composting.
• the biodegradable packaging according to the invention is able to pass through a furnace or a microwave (microwavable packaging) and withstands, for example, temperatures up to 130 ° C., preferably ranging from 120 ° C. and more particularly ranging from -30 ° C to 120 ° C, such as -10 ° C to 1 10 ° C.
• the package 10 according to the invention has a cylindrical shape of varied section which is itself defined by the shape (the contour) of the bottom 2.
• the bottom 2 may have various shapes, including a polygonal shape (at least three straight edges connected by vertices) or non-polygonal (at least one curved edge, such as round, oval).
• the bottom 2 has a polygonal shape, such as triangular, square or rectangular, etc. and therefore comprises angles which themselves define zones of angle 32 (zone where the wall 3 changes orientation) on the inside of the package 10, interconnected by side walls 31.
• the angles present on the bottom 2 do not form, preferably, a right angle or are not substantially at right angles.
• the angles are rounded, chamfered or bevel (edge cut obliquely).
• the corner areas 32 of the package 10 are generally rounded or cut.
• the zones of angles 32 are generally mainly formed by the biodegradable film 6, namely that it covers at least 60%, preferably at least 80% and in general at least 90% of the surface corner areas 32, especially when these corner areas 32 comprise openings 5.
• the biodegradable support at the corner areas serves mainly to give the orientation of the wall 3.
• At least 60% means the following values (in percentage) or any interval between these values: 60; 65; 70; 75; 80; 81; 82; 83; 84; 85; 86; 87; 88; 89; 90; 91; 92; 93; 94; 95; 96; 97; 98, 99; etc.
• edge 4 forms an angle substantially at right angles with material input at these angles so as to allow the heat sealing of a film (lidding).
• the biodegradable film 6 is positioned on the biodegradable support 1 by the technique of molding labeling (IML for English In-Mold Labeling).
• the molding labeling method consists in depositing a plastic label in an injection tool during the manufacture of a packaging, also synthetic material. It is not at all common to use such a process with paper or cellulosic film. In addition, when it comes to labeling, the label is of course glued to the outside of the package to be visible to the consumer.
• the present invention proposes in an original way to use a process resulting from the IML process.
• the present invention thus relates to a method for producing a package 10 as described above implemented in a molded injection molding injection device (IML).
• IML molded injection molding injection device
• the mold of the IML device has a first generally fixed part and a second part, which is positioned opposite the first part, and which is generally mobile.
• the shape of the first portion corresponds to the inner face of the desired package, while the shape of the second portion has a shape complementary to the desired package.
• the method according to the invention comprises the following steps:
• the biodegradable film 6 being generally in the form of a pre-cut flat film, so that said biodegradable film 6 at least partially covers said wall of the mold;
• said biodegradable film 6 is as described above.
• the film 6 is multilayer and comprises a layer of resin or thermoplastic polymer 8 which is sandwiched between the support 1 and the cellulose-based layer 9.
• the cellulose-based layer is disposed against the wall of the first part of the mold.
• the resin layer or the biodegradable thermoplastic polymer layer that is disposed against the wall of the first part of the mold.
• the film 6 When the film 6 is monolayer, it is simply placed against the wall of the first part of the mold.
• the biodegradable film 6 is deposited on the wall of the first portion of the mold corresponding to the inner face of the desired package depending on the number and location of the openings 5.
• the material forming the biodegradable support 1, such as agromaterial is injected into the IML device (mold) by a conventional injection process known from those skilled in the art and not described in detail here.
• a package according to the invention is thus obtained with excellent bonding between the biodegradable support 1 based on agromaterial and the cellulose-based layer or, where appropriate, between the biodegradable support 1 based on agromaterial and the resin layer. or the biodegradable polymer layer.
• the biodegradable film 6 is generally in a pre-cut form.
• the biodegradable film 6 may be pre-cut so as to form a package presenting corner regions 32 with cut sides which are connected by side walls 33.
• the pre-cut biodegradable film 6 comprises a central portion 61 which will form the bottom 2 of the package 10 during the step (d) of recovery (demoulding).
• This central portion 61 is extended, on the one hand, by side flaps 62, four if the bottom 2 of the package is square or rectangular.
• These lateral flaps 62 are generally rectangular in appearance and are folded during the injection step (c) to form the side walls 31.
• the central portion 61 is also extended by angled shutters
• angle flaps 63 also four if the bottom 2 of the package is square or rectangular. These angle flaps 63 are also generally rectangular in appearance and will fold during the injection step (c) to form the corner areas 32. In particular, the corner flaps 63 and the flaps 62 are separated by "V" cuts
• angle flaps 63 are formed between two lateral flaps 62 and between two "V" cutouts 64.
• Complementary cuts may also be provided on the side and / or angle flaps so that the film 6 marries in a precise manner the inner face of the package 10 after demolding. These different cuts in particular avoid excess material during the injection step.
• Steps (b) to (d) are the conventional steps of an IML injection and are well known to those skilled in the art.
• the contacting step (b) is performed by automatic removal with an electrostatic charge or suction.
• the POLYFLEX robot marketed by Machines Pages is suitable for the process according to the invention.
• the step (c) of injection of the material or materials that can form the biodegradable support 1 is carried out for example at a speed ranging from 10 to 200 mm / sec.
• This or these materials have been previously plasticized, namely heated to a temperature of plasticization ranging from 120 to 230 ° C.
• a pressure ranging from 500 bar to 2400 bar is exerted between the two parts of the mold and the assembly is heated to a temperature ranging from 150 ° C. to 220 ° C. and preferably from 160 ° C. to 210 ° C.
• the cycle time is between 2 and 20 sec.
• step (a) perfectly fits the shape of the mold and is welded to the (x) material (s) injected (s) forming the biodegradable support 1.
• the film 6 adheres and is bonded to the inner face of the biodegradable support 1.
• the biodegradable support 1 once injected and cured, has a very low shrinkage rate and in particular less than or equal to 1%, preferably less than or equal to 0.8%, and typically lower or equal to 0.5%.
• a shrinkage ratio of less than or equal to 1% the following values and all ranges between these values are: 1; 0.9; 0.8; 0.7; 0.6; 0.5; 0.4; 0.3; 0.2; 0.1; 0.09; 0.08; 0.07; 0.06; 0.05; 0.04; 0.03; 0.02; 0.01; etc.
• the shrinkage rate is usually measured according to ISO 294-4: 2001.
• a package it is preferable to provide labeling and / or decoration. It is thus possible to add on the cellulose layer 9 a new complex, formed for example of a cellulosic film and a sheet of paper, to decorate and / or label the package.
• the multilayer thus obtained makes it possible to provide a gas barrier and to obtain a good watertightness.
• the present invention also relates to the use of the packaging described above:
• the packaging 10 is well suited for the production of packaging, particularly in the field of food but other uses may be considered.
• a comparative package (FIG. 7 (a) to (c)) comprising: a non-biodegradable plastic support made of polypropylene (PP) and a plastic film also made of PP has been manufactured using the process of the invention (process by IML) .
• PP is commonly used to make food trays.
• the comparative package includes many openings whether on the bottom and the wall according to the characteristics of the package according to the invention.
• a package according to the invention ((Fig.7 (a) to (c)) comprising a biodegradable support PLA and a biodegradable PLA film has also been achieved by following the method of the invention.
• a PP film (comparative example) and a PLA film were cut so as to have the shape illustrated in FIG. 6 (a);
• this PP or PLA film was then placed in the first part of an IML mold having a wall so that the film covers the wall of the mold;
• the first part of the mold and the second part of the mold have been brought into contact (closing and locking phase during an automatic cycle in thermoplastic injection);
• the comparative packaging according to the invention for an identical structure (the PP support has the same shape / framework as the PLA support according to the invention) does not have good mechanical properties. : the structure is easily deformed by simple manual pressure (fig.7 (a)) (no rigidity, the structure does not fit and can not be used to contain containers), contrary to the structure of the invention which remains rigid under the pressure exerted (Fig.8 (c)).
• the PP film forms waves (Fig.7 (a) (b)). This is due in particular to the high shrinkage rate of the PP support after injection, while the PP film does not shrink.
• the PLA film according to the invention does not form any wave (the film remains taut) on the PLA support according to the invention (FIG. 8 (a) (b)) which does not shrink or very little as shows the table below.

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• 2017
  • 2017-06-28 FR FR1755928A patent/FR3068337B1/fr active Active
• 2018
  • 2018-06-28 EP EP18762348.3A patent/EP3645413A1/de active Pending
  • 2018-06-28 CA CA3067412A patent/CA3067412A1/fr active Pending
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