WO2001034498A1 - Biodegradable compressible cushioning material and method for making same - Google Patents

Biodegradable compressible cushioning material and method for making same Download PDF

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Publication number
WO2001034498A1
WO2001034498A1 PCT/FR2000/003151 FR0003151W WO0134498A1 WO 2001034498 A1 WO2001034498 A1 WO 2001034498A1 FR 0003151 W FR0003151 W FR 0003151W WO 0134498 A1 WO0134498 A1 WO 0134498A1
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WO
WIPO (PCT)
Prior art keywords
corn
cushioning material
elements
extrusion
based composition
Prior art date
Application number
PCT/FR2000/003151
Other languages
French (fr)
Inventor
Denis Morillon
Pascal Morillon
Original Assignee
Denis Morillon
Pascal Morillon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denis Morillon, Pascal Morillon filed Critical Denis Morillon
Priority to AU17115/01A priority Critical patent/AU1711501A/en
Priority to EP00979716A priority patent/EP1159207A1/en
Publication of WO2001034498A1 publication Critical patent/WO2001034498A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B65D81/02—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 specially adapted to protect contents from mechanical damage
    • B65D81/05—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 specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/09—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 specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using flowable discrete elements of shock-absorbing material, e.g. pellets or popcorn
    • 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

  • BIODEGRADABLE COMPRESSIBLE SETTING MATERIAL AND MANUFACTURING METHOD BIODEGRADABLE COMPRESSIBLE SETTING MATERIAL AND MANUFACTURING METHOD.
  • the present invention relates to the field of biodegradable packaging materials, and more particularly packaging materials produced from expanded vegetable flour.
  • patent FR2681005 describing light elements for stuffing packaging boxes.
  • these elements are based on expanded starch and are biodegradable. They can be manufactured in the form of mold blocks or small elements (chips) usable in bulk.
  • the elements are made from a mixture of starch, wood dust and water, by hot swelling of the starch. A proportion of 9 to 20% of wood dust allows to obtain sufficiently rigid and light elements without being brittle. Small parts can be produced by hot extrusion, especially in the form of tubes curved having a central duct. In bulk, the density of the padding is 25 to 27 kg / m3.
  • the invention relates, in its most general sense, to a compressible cushioning material consisting of elements manufactured by extruding a composition based on corn, characterized in that the composition based on corn comprises semolina. But.
  • Such a material has improved characteristics compared to the materials of the prior art which are often brittle and brittle.
  • the qualities of this material come from the selection of cornmeal instead of simple cornmeal.
  • the cornmeal is obtained by crushing the degermed and husked corn kernels between two calendering rolls.
  • the aim is to avoid the heating produced by grinders and to keep the cornmeal thus prepared a good rehydration capacity.
  • corn is a variety of horny corn of the year.
  • the composition further comprises water and a softening agent.
  • the composition also comprises a dye.
  • the extruded elements are bagged in an envelope permeable to water vapor.
  • the density of the extruded elements at the outlet of the extruder is between 20 and 6 grams per cubic decimeter.
  • the elements have a shape of a longitudinal rod or, in longitudinal section, an S shape.
  • the invention also relates to a method of manufacturing packaging materials by extruding a composition based on corn flour, characterized in that a mixture is prepared comprising cornmeal and water and in that that an extrusion is carried out at a temperature between 175 ° and 195 °.
  • said mixture comprises cornmeal obtained by crushing the degermed and husked corn grains between two calendering rolls.
  • extruded elements are prepared from a composition comprising approximately:
  • This composition corresponds to the quantity introduced per hour into one extruder.
  • Cornmeal is semolina obtained by grinding between two smooth cylinders of degermed corn.
  • the variety of corn used is a horny corn, toothed of the year, resulting from a reduced number (less than 5) varieties selected in homogeneous mixture.
  • Density 0.63 to 0.67 grams per cubic decimeter.
  • the extrusion equipment includes a dispenser for preparing the mixture of cornmeal, water, softener and colorant.
  • the doser opens into an extruder with 4 nozzles having a section of 3 mm.
  • the extruder can also include, for example, 8 nozzles having a section of 2.4 mm or alternatively, 12 nozzles having a section of 1.9 mm.
  • the speed of the extrusion screw is of the order of 800 to 1100 revolutions per minute.
  • the stop pressure is of the order of 80 bars.
  • the humidity at the outlet of the extrusion die is 7.85%.
  • a double screw can also be used, consisting of two screws having the same pitch, rotating at the same speed, in the same direction and offset by a distance of half a pitch.
  • the extruded elements have a substantially more or less longitudinal shape of strands.
  • the extruded elements are then left to stand in the open air until the humidity level reaches approximately 11%.
  • the recovery of humidity can be accelerated by the injection of water vapor.
  • the elements are then introduced into air-permeable packaging sachets to promote a gradual recovery of humidity.
  • Confidential tests carried out on an experimental basis were carried out using cornmeal with a humidity of 13%, a density of 667 grams per liter and an average particle size of the order of 500 micrometers. They made it possible to produce cylindrical materials with a diameter of 15 to 20 mm and a length of 20 to 30 mm. The density is less than or equal to 20 grams per liter and close to 14 grams per liter. The humidity at the machine outlet is 7.5 to 9%. After 48 hours of storage in the open air, the humidity rises to 9 to 12%. Resilience, when applying a compression force of 20 Newton for 30 seconds, allows compression of 50% in diameter compared to its initial state. After 10 seconds, the material has a recovery of 70% and 80% of the diameter after 5 minutes.
  • the density of the material leaving the extruder is close to 10 grams per liter.
  • the density of the material at the outlet d extruder can reach 6 grams per liter.

Abstract

The invention concerns a compressible cushioning material consisting of elements produced by extruding a composition based on corn, the corn-based composition comprising corn meal.

Description

MATERIAU DE CALAGE COMPRESSIBLE BIODEGRADABLE ET PROCEDE DE FABRICATION. BIODEGRADABLE COMPRESSIBLE SETTING MATERIAL AND MANUFACTURING METHOD.
La présente invention concerne le domaine des matériaux d'emballage biodégradables, et plus particulièrement des matériaux de calage réalisé à partir de farines végétales expansées .The present invention relates to the field of biodegradable packaging materials, and more particularly packaging materials produced from expanded vegetable flour.
La réalisation de matériaux de calage biodégradables par extrusion de compositions à base de farines végétales ou de maïs est connue. On pourra se référer aux brevets allemands DE4126756 ou DE4025256 ou aux brevets européens EP-201625, EP-269990, EP-471306, EP- 474095. ' état de la technique le plus proche pourrait être constitué par le brevet FR2748459 qui concerne un produit et un procédé de fabrication d'un matériau léger biodégradable résultant de la prise et du durcissement du mélange d'un liant constitué de colle naturelle végétale et/ou animale et de végétaux expansés, notamment, maïs expansé, riz expansé, découpes de pommes de terre expansés, solutions colloïdales extrudées d'origine végétale et autres matières similaires.The production of biodegradable cushioning materials by extrusion of compositions based on vegetable flour or corn is known. We can refer to the German patents DE4126756 or DE4025256 or to the European patents EP-201625, EP-269990, EP-471306, EP-474095. The closest state of the art could be constituted by patent FR2748459 which relates to a product and a process for manufacturing a light biodegradable material resulting from the setting and hardening of the mixture of a binder consisting of natural vegetable and / or animal glue and expanded plants, in particular, expanded corn, expanded rice, cut potatoes expanded, extruded colloidal solutions of vegetable origin and other similar materials.
Un autre document de 1 ' art antérieur proche de l'invention est le brevet FR2681005 décrivant des éléments légers pour le rembourrage de boîtes d'emballage. Afin d'éliminer les problèmes de pollution, ces éléments sont à base d'amidon expansé et sont biodégradables. Ils peuvent être fabriqués sous la forme de blocs moules ou de petits éléments (chips) utilisables en vrac. Les éléments sont fabriques à partir d'un mélange d'amidon, de poussière de bois et d'eau, par gonflement à chaud de l'amidon. Une proportion de 9 à 20 % de poussière de bois permet d'obtenir des éléments suffisamment rigides et légers sans être cassants. Les petits éléments peuvent être produits par extrusion à chaud, notamment sous la forme de boudins recourbés ayant un conduit central. En vrac, la densité du rembourrage est de 25 à 27 kg/m3.Another document of the prior art close to the invention is patent FR2681005 describing light elements for stuffing packaging boxes. In order to eliminate pollution problems, these elements are based on expanded starch and are biodegradable. They can be manufactured in the form of mold blocks or small elements (chips) usable in bulk. The elements are made from a mixture of starch, wood dust and water, by hot swelling of the starch. A proportion of 9 to 20% of wood dust allows to obtain sufficiently rigid and light elements without being brittle. Small parts can be produced by hot extrusion, especially in the form of tubes curved having a central duct. In bulk, the density of the padding is 25 to 27 kg / m3.
Les différentes solutions proposées dans l'art antérieur ne sont pas totalement satisfaisantes, et il est apparu nécessaire d'améliorer cette idée générale en proposant un nouveau matériau présentant des qualités de reprise de l'humidité après l' extrusion, afin de conférer aux éléments extrudés une souplesse plus importante, et augmentant graduellement en raison de la reprise d'humidité pendant la phase d'utilisation.The various solutions proposed in the prior art are not entirely satisfactory, and it appeared necessary to improve this general idea by proposing a new material having qualities for taking up moisture after extrusion, in order to give the elements extruded greater flexibility, and gradually increasing due to the uptake of moisture during the use phase.
L'invention concerne à cet effet, dans son acception la plus générale, un matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs caractérisé en ce que la composition à base de mais comprend de la semoule de maïs.To this end, the invention relates, in its most general sense, to a compressible cushioning material consisting of elements manufactured by extruding a composition based on corn, characterized in that the composition based on corn comprises semolina. But.
Un tel matériau présente des caractéristiques améliorées par rapport aux matériaux de l'état de la technique qui sont souvent cassants et friables. Les qualités de ce matériau proviennent de la sélection de semoules de maïs au lieu de simples farines de maïs .Such a material has improved characteristics compared to the materials of the prior art which are often brittle and brittle. The qualities of this material come from the selection of cornmeal instead of simple cornmeal.
Préférentiellement , la semoule de maïs est obtenue par écrasement des grains de maïs dégermés et décortiqués entre deux cylindres de calandrage. Le but est d'éviter 1 ' échauffement produit par des broyeurs et de conserver à la semoule de maïs ainsi préparée une bonne capacité de réhydratation.Preferably, the cornmeal is obtained by crushing the degermed and husked corn kernels between two calendering rolls. The aim is to avoid the heating produced by grinders and to keep the cornmeal thus prepared a good rehydration capacity.
Avantageusement, le maïs est une variété de maïs corné denté, de l'année.Advantageously, corn is a variety of horny corn of the year.
Selon un mode de réalisation préféré, la composition comprend en outre de 1 ' eau et un agent adoucissant .According to a preferred embodiment, the composition further comprises water and a softening agent.
Avantageusement, la composition comprend en outre un colorant. Selon une variante préférée, les éléments extrudés sont ensachés dans une enveloppe perméable à la vapeur d ' eau .Advantageously, the composition also comprises a dye. According to a preferred variant, the extruded elements are bagged in an envelope permeable to water vapor.
La densité des éléments extrudés à la sortie de 1 ' extrudeuse est comprise entre 20 et 6 grammes par décimètre cube.The density of the extruded elements at the outlet of the extruder is between 20 and 6 grams per cubic decimeter.
Les éléments présentent une forme de boudin longitudinal ou, en coupe longitudinale, une forme en S.The elements have a shape of a longitudinal rod or, in longitudinal section, an S shape.
L'invention concerne aussi un procédé de fabrication de matériaux d'emballage par extrusion d'une composition à base de farine de maïs caractérisé en ce que l'on prépare un mélange comprenant de la semoule de maïs et de l'eau et en ce que l'on procède à une extrusion à une température comprise entre 175° et 195°.The invention also relates to a method of manufacturing packaging materials by extruding a composition based on corn flour, characterized in that a mixture is prepared comprising cornmeal and water and in that that an extrusion is carried out at a temperature between 175 ° and 195 °.
De préférence, ledit mélange comprend de la semoule de maïs obtenue par écrasement des grains de maïs dégermés et décortiqués entre deux cylindres de calandrage.Preferably, said mixture comprises cornmeal obtained by crushing the degermed and husked corn grains between two calendering rolls.
En outre, il est possible d'injecter du gaz pendant l' extrusion, afin de faire baisser la densité des éléments à la sortie de 1 ' extrudeuse .In addition, it is possible to inject gas during the extrusion, in order to lower the density of the elements at the outlet of the extruder.
L'invention sera décrite dans ce qui suit à titre d'exemple non limitatif de mise en œuvre. Les éléments extrudés sont préparés à partir d'une composition comprenant environ :The invention will be described in the following by way of non-limiting example of implementation. The extruded elements are prepared from a composition comprising approximately:
400 kg de semoule de maïs 10 kg d'eau et un agent adoucissant et un colorant, ces additifs représentant moins de 1% du poids de la composition.400 kg of cornmeal 10 kg of water and a softening agent and a dye, these additives representing less than 1% of the weight of the composition.
Cette composition correspond à la quantité introduite par heure dans 1 ' extrudeuse .This composition corresponds to the quantity introduced per hour into one extruder.
La semoule de maïs est une semoule obtenue par mouture entre deux cylindres lisses de maïs dégermé. La variété de maïs employée est un maïs corné, denté de l'année, issu d'un nombre réduit (moins de 5) variétés sélectionnées en mélange homogène.Cornmeal is semolina obtained by grinding between two smooth cylinders of degermed corn. The variety of corn used is a horny corn, toothed of the year, resulting from a reduced number (less than 5) varieties selected in homogeneous mixture.
Les caractéristiques de la semoule préférée sont les suivantes :The characteristics of the preferred semolina are as follows:
GranulometrieGranulometry
Retenue surHold on
- 1000 micromètres 0%- 1000 micrometers 0%
- 710 micromètres 0 à 5% - 500 micromètres 65 à 82 %- 710 micrometers 0 to 5% - 500 micrometers 65 to 82%
- 250 micromètres 10 à 25 %- 250 micrometers 10 to 25%
- 100 micromètres 0 à 4%- 100 micrometers 0 to 4%
Densité : 0,63 à 0,67 grammes par décimètre cube .Density: 0.63 to 0.67 grams per cubic decimeter.
Caractéristiques chimiquesChemical characteristics
Humidité 11 à 14%Humidity 11 to 14%
Matières grasses 0,5 à 0,9 %Fat 0.5 to 0.9%
Protéines grasses 9 à 11 %Fat protein 9 to 11%
Cendres/matières minérales 0,2 à 0,5ξ Ash / mineral 0.2-0.5 ξ
Amidon 75 à 85%Starch 75 to 85%
Caractéristiques microbiologiquesMicrobiological characteristics
Flore aérobie mésophile 3.10 germes/g Coliformes totaux 103 germes/gAerobic mesophilic flora 3.10 germs / g Total coliforms 103 germs / g
Coliformes fécaux < 10 germes /gFecal coliforms <10 germs / g
Anaérobies suifito-réduc < 10 germes /gTallow-reduced anaerobes <10 germs / g
Salmonelles 0Salmonella 0
Levures moisissures < 1000 germes/g Bacillus cereus < 100 germes/g L'équipement d' extrusion comporte un doseur pour la préparation du mélange de semoule de maïs, d'eau, d'adoucissant et de colorant. Le doseur débouche dans une extrudeuse comportant 4 buses présentant une section de 3 mm. L' extrudeuse peut également comporter, par exemple, 8 buses présentant une section de 2,4 mm ou encore, 12 buses présentant une section de 1,9 mm.Mold yeasts <1000 germs / g Bacillus cereus <100 germs / g The extrusion equipment includes a dispenser for preparing the mixture of cornmeal, water, softener and colorant. The doser opens into an extruder with 4 nozzles having a section of 3 mm. The extruder can also include, for example, 8 nozzles having a section of 2.4 mm or alternatively, 12 nozzles having a section of 1.9 mm.
La vitesse de la vis d' extrusion est de l'ordre de 800 à 1100 tours par minute. La pression butée est de l'ordre de 80 bars. Le taux d'humidité à la sortie de la filière d' extrusion est de 7,85%.The speed of the extrusion screw is of the order of 800 to 1100 revolutions per minute. The stop pressure is of the order of 80 bars. The humidity at the outlet of the extrusion die is 7.85%.
Une double vis peut également être utilisée, constituée de deux vis présentant le même pas, tournant à la même vitesse, dans le même direction et décalées d'une distance d'un demi pas.A double screw can also be used, consisting of two screws having the same pitch, rotating at the same speed, in the same direction and offset by a distance of half a pitch.
Les éléments extrudés ont une forme sensiblement de boudins plus ou moins longitudinaux. Les éléments extrudés sont ensuite mis à reposer à l'air libre jusqu'à ce que le taux d'humidité atteigne environ 11%. La reprise d'humidité peut être accélérée par l'injection de vapeur d'eau.The extruded elements have a substantially more or less longitudinal shape of strands. The extruded elements are then left to stand in the open air until the humidity level reaches approximately 11%. The recovery of humidity can be accelerated by the injection of water vapor.
Les éléments sont ensuite introduits dans des sachets de conditionnement perméables à 1 ' air pour favoriser une reprise progressive d'humidité.The elements are then introduced into air-permeable packaging sachets to promote a gradual recovery of humidity.
Les essais confidentiels réalisés à titre expérimental ont été réalisés à partir de semoule de maïs présentant une humidité de 13%, une densité de 667 grammes par litre et une granulométrie moyenne de l'ordre de 500 micromètres. Ils ont permis de réaliser des matériaux de forme cylindrique d'un diamètre de 15 à 20 mm et d'une longueur de 20 à 30 mm. La densité est inférieure ou égale à 20 grammes par litre et proche de 14 grammes par litre. L'humidité en sortie de machine est de 7,5 à 9%. Après 48 heures de stockage à l'air libre, l'humidité remonte à 9 à 12%. La résilience, lors de l'application d'une force de compression de 20 Newton pendant 30 secondes, permet la compression de 50% en diamètre par rapport à son état initial. Au bout de 10 secondes, le matériau présente une reprise de 70% et de 80% du diamètre après 5 minutes .Confidential tests carried out on an experimental basis were carried out using cornmeal with a humidity of 13%, a density of 667 grams per liter and an average particle size of the order of 500 micrometers. They made it possible to produce cylindrical materials with a diameter of 15 to 20 mm and a length of 20 to 30 mm. The density is less than or equal to 20 grams per liter and close to 14 grams per liter. The humidity at the machine outlet is 7.5 to 9%. After 48 hours of storage in the open air, the humidity rises to 9 to 12%. Resilience, when applying a compression force of 20 Newton for 30 seconds, allows compression of 50% in diameter compared to its initial state. After 10 seconds, the material has a recovery of 70% and 80% of the diameter after 5 minutes.
Pour diminuer la densité du matériau en sortie d' extrudeuse , il est possible d'injecter du gaz pendant 1' extrusion, comme par exemple de l'azote, à une pression avoisinant les 10 bars ?To decrease the density of the material at the outlet of the extruder, it is possible to inject gas during the extrusion, such as nitrogen, at a pressure of around 10 bars?
En opérant de la sorte, la densité du matériau en sortie d' extrudeuse est proche de 10 grammes par litres.By operating in this way, the density of the material leaving the extruder is close to 10 grams per liter.
Pour diminuer la densité du matériau en sortie d' extrudeuse, il est également possible de modifier la forme des éléments .To reduce the density of the material leaving the extruder, it is also possible to modify the shape of the elements.
Ainsi, lorsque les éléments formant le matériau présentent en coupe longitudinale une forme en S, c'est-à- dire qu'ils présentent deux cavités courbées orientées dans des directions identiques et ouvrant dans des sens opposés, la densité du matériau en sortie d' extrudeuse peut atteindre 6 grammes par litres. Thus, when the elements forming the material have in longitudinal section an S shape, that is to say that they have two curved cavities oriented in identical directions and opening in opposite directions, the density of the material at the outlet d extruder can reach 6 grams per liter.

Claims

REVENDICATIONS
1. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs caractérisé en ce que la composition à base de maïs comprend de la semoule de maïs .1. Compressible cushioning material consisting of elements manufactured by extrusion of a corn-based composition characterized in that the corn-based composition comprises cornmeal.
2. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon la revendication 1 caractérisé en ce que la semoule de maïs est obtenue par écrasement des grains de maïs dégermés et décortiqués entre deux cylindres de calandrage.2. Compressible cushioning material consisting of elements manufactured by extrusion of a corn-based composition according to claim 1 characterized in that the cornmeal is obtained by crushing the degermed and peeled corn kernels between two calendering rolls.
3. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon la revendication 1 ou 2 caractérisé en ce que le maïs est une variété de maïs corné denté, de 1 ' année .3. Compressible cushioning material consisting of elements manufactured by extrusion of a corn-based composition according to claim 1 or 2 characterized in that the corn is a variety of dent corn, 1 year.
4. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon l'une au moins des revendications précédentes caractérisé en ce que la composition comprend en outre de l'eau et un agent adoucissant.4. Compressible cushioning material consisting of elements produced by extrusion of a corn-based composition according to at least one of the preceding claims, characterized in that the composition also comprises water and a softening agent.
5. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon l'une au moins des revendications précédentes caractérisé en ce que la composition comprend en outre un colorant.5. Compressible cushioning material consisting of elements produced by extrusion of a corn-based composition according to at least one of the preceding claims, characterized in that the composition also comprises a dye.
6. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon l'une au moins des revendications précédentes caractérisé en ce que les éléments extrudés sont ensachés dans une enveloppe perméable à la vapeur d' eau.6. compressible cushioning material consisting of elements manufactured by extrusion of a corn-based composition according to at least one of the preceding claims, characterized in that the extruded elements are bagged in an envelope permeable to water vapor.
7. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon l'une au moins des revendications précédentes caractérisé en ce que la densité des éléments extrudés à la sortie de 1 ' extrudeuse est comprise entre 20 et 6 grammes par décimètre cube. 7. Compressible cushioning material consisting of elements produced by extruding a composition based on corn according to at least one of the preceding claims, characterized in that the density of the elements extruded at the outlet of the extruder is between 20 and 6 grams per cubic decimetre.
8. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon l'une au moins des revendications précédentes caractérisé en ce que la résilience, lors de l'application d'une force de compression de 20 Newton pendant 30 secondes, permet la compression de 50% en diamètre par rapport à son état initial, le matériau présentant une reprise de 70% au bout de 10 secondes et de 80% du diamètre après 5 minutes.8. compressible cushioning material constituted by elements produced by extrusion of a corn-based composition according to at least one of the preceding claims, characterized in that the resilience, upon application of a compressive force of 20 Newton for 30 seconds, allows compression of 50% in diameter compared to its initial state, the material having a recovery of 70% after 10 seconds and 80% of the diameter after 5 minutes.
9. Matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs selon l'une au moins des revendications précédentes caractérisé en ce que lesdits éléments présentent en coupe longitudinale une forme en S.9. compressible cushioning material constituted by elements produced by extrusion of a corn-based composition according to at least one of the preceding claims, characterized in that said elements have an S-shape in longitudinal section.
10. Procédé de fabrication de matériaux d'emballage par extrusion d'une composition à base de farine de maïs caractérisé en ce que l'on prépare un mélange comprenant de la semoule de maïs et de 1 ' eau et en ce que l'on procède à une extrusion à une température comprise entre 175° et 195°. 10. A method of manufacturing packaging materials by extruding a composition based on corn flour, characterized in that a mixture is prepared comprising cornmeal and water and in that extrudes at a temperature between 175 ° and 195 °.
11. Procédé de fabrication de matériaux d'emballage selon la revendication 10 caractérisé en ce que ledit mélange comprend de la semoule de maïs obtenue par écrasement des grains de maïs dégermés et décortiqués entre deux cylindres de calandrage. 11. A method of manufacturing packaging materials according to claim 10 characterized in that said mixture comprises cornmeal obtained by crushing the degermed and husked corn kernels between two calendering rolls.
12. Procédé de fabrication de matériaux d'emballage selon la revendication 10 ou la revendication 11 caractérisé en ce que l'on injecte du gaz pendant 1 ' extrusion. MATERIAU DE CALAGE COMPRESSIBLE BIODEGRADABLE ET PROCEDE DE FABRICATION.12. A method of manufacturing packaging materials according to claim 10 or claim 11 characterized in that one injects gas during one extrusion. BIODEGRADABLE COMPRESSIBLE SETTING MATERIAL AND MANUFACTURING METHOD.
La présente invention concerne un matériau de calage compressible constitué par des éléments fabriqués par extrusion d'une composition à base de maïs, la composition à base de maïs comprenant de la semoule de maïs . The present invention relates to a compressible cushioning material consisting of elements produced by extruding a corn-based composition, the corn-based composition comprising cornmeal.
PCT/FR2000/003151 1999-11-12 2000-11-10 Biodegradable compressible cushioning material and method for making same WO2001034498A1 (en)

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AU17115/01A AU1711501A (en) 1999-11-12 2000-11-10 Biodegradable compressible cushioning material and method for making same
EP00979716A EP1159207A1 (en) 1999-11-12 2000-11-10 Biodegradable compressible cushioning material and method for making same

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FR9914239A FR2801041B1 (en) 1999-11-12 1999-11-12 BIODEGRADABLE COMPRESSIBLE SETTING MATERIAL AND MANUFACTURING METHOD
FR99/14239 1999-11-12

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FR2817501A1 (en) * 2000-12-06 2002-06-07 Clextral An expanded product used for packaging and insulation is produced by extruding and heating crushed vegetable matter
WO2002046295A1 (en) * 2000-12-06 2002-06-13 Clextral Expanded product made of biodegradable material and method and installation for continuously making same

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WO2002046295A1 (en) * 2000-12-06 2002-06-13 Clextral Expanded product made of biodegradable material and method and installation for continuously making same

Also Published As

Publication number Publication date
FR2801041A1 (en) 2001-05-18
EP1159207A1 (en) 2001-12-05
AU1711501A (en) 2001-06-06
FR2801041B1 (en) 2002-01-18

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