EP0229550A1 - Packaging material for moisture-sensitive products and bags made therefrom. - Google Patents

Packaging material for moisture-sensitive products and bags made therefrom. Download PDF

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Publication number
EP0229550A1
EP0229550A1 EP86402660A EP86402660A EP0229550A1 EP 0229550 A1 EP0229550 A1 EP 0229550A1 EP 86402660 A EP86402660 A EP 86402660A EP 86402660 A EP86402660 A EP 86402660A EP 0229550 A1 EP0229550 A1 EP 0229550A1
Authority
EP
European Patent Office
Prior art keywords
water
support sheet
material according
retaining
packaging
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP86402660A
Other languages
German (de)
French (fr)
Other versions
EP0229550B1 (en
Inventor
Robert Temple
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Charentaise de Participations Ste SA
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Charentaise de Participations Ste SA
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Publication of EP0229550A1 publication Critical patent/EP0229550A1/en
Application granted granted Critical
Publication of EP0229550B1 publication Critical patent/EP0229550B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31699—Ester, halide or nitrile of addition polymer
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31884—Regenerated or modified cellulose
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • the invention relates to a material intended for the packaging of a product sensitive to humidity, a method of manufacturing such a material and a packaging comprising such a material.
  • the invention relates to materials in the general form of sheets, more particularly intended for the packaging of products such as cheeses, meats, etc.
  • the function of such packaging is to protect the packaged product from the outside ambient atmosphere, as well as from untimely contacts.
  • Such packaging also has the function of having a selective permeability to gas and to humidity, taking into account the modifications that the packaged product may undergo, likely to go as far as altering the product, in particular its taste.
  • the function of such packaging is to regulate the humidity and / or exudate from the packaged product.
  • a meat packing includes a base formed of a single sheet of cellulosic fibers, in particular paper, and a waterproof agent placed on the external face of the sheet of cellulosic fibers or impregnating it at least partially.
  • the waterproof agent may be a ureaformol resin.
  • such a package is resistant to humidity, while at least partially allowing aqueous liquids to pass through the fibers.
  • packaging does not fulfill the function of reciprocal gas exchanges between the packaged product and the external ambient atmosphere, due to the presence of the impermeable agent.
  • packaging fulfill the function of absorbing moisture. from the packaged product, if not to a very limited extent.
  • the package comprises a layer of moisture-absorbent fibers, in particular paper, and a film resistant to moisture, provided with small perforations (synthetic resin).
  • a layer of moisture-absorbent fibers in particular paper
  • a film resistant to moisture provided with small perforations (synthetic resin).
  • a package comprising a sheet or strip of metal coated with a thermoplastic foil, capable of absorbing moisture or swelling in the liquid.
  • a packaging thus produced is waterproof but essentially makes it possible to produce a container of the "tin can" type.
  • the object of the invention is a material intended for producing a packaging for products sensitive to humidity, capable of controlling the humidity of the atmosphere surrounding the product thus packaged.
  • the invention provides a material which consists of a combination of at least one support sheet and at least one water-retaining material intimately associated with the support sheet, by means of association.
  • a material which consists of a combination of at least one support sheet and at least one water-retaining material intimately associated with the support sheet, by means of association.
  • Such a material is intended for packaging a food or other product, sensitive to humidity, and has the function of regulating the humidity and / or the exudate coming from the product thus packaged.
  • the moisture and / or exudate from the packaged product is absorbed and retained by the water-retaining material, without affecting the physical qualities of the support sheet, in particular its behavior, and without affecting the packaged product itself.
  • the material according to the invention is capable of a certain desorption, the absorption and desorption being a function of the humidity and the temperature prevailing inside the packaging and of that prevailing in the ambient atmosphere outside.
  • the support sheet can be in a single layer or in several layers; impervious to gas and / or water vapor, or, on the contrary, permeable.
  • the water-retaining material can be incorporated or superimposed on the support sheet.
  • the water-retaining material itself can be made of a resin or another material. The material thus produced may comprise one or more layers.
  • Figures 1, 2, 3, 4 are four schematic views in cross section illustrating four embodiments of the material according to the invention.
  • Figure 5 is a schematic perspective view of a package made from the material.
  • the invention relates to a material for packaging a product; a method of manufacturing such a material; and a packaging comprising such a material, intended for this product.
  • the product per se, for which the packaging is intended, is not directly the subject of the invention. It is preferably a product sensitive to humidity, the packaging having the function of regulating the humidity and / or the exudate coming from this product, once packaged.
  • a product can be a food product, such as cheese, meat, fish, cookies or another living product such as flowers or finally, products such as mechanical, electronic or electrical parts.
  • the material according to the invention is characterized in that it comprises in combination at least one support sheet 1 and at at least one water-repellent material 2 intimately associated with the support sheet by association means 3.
  • Such a material allows the realization of a packaging for the product mentioned above and its function is to regulate the humidity and / or the exudate coming from the product.
  • the support sheet 1 of the material according to the invention essentially has the function of ensuring a physical hold of the material, as well as of constituting a support for the water-retaining material.
  • the material according to the invention can be the subject of several variant embodiments. These alternative embodiments arise from the alternative embodiments of the support sheet 1, the water-retaining material 2, the association means 3, as well as from the very constitution of the material. These different variants in the production of the constituent means of the material can be combined with one another.
  • the support sheet 1 is generally a flat element; in the form of a plate, tablecloth, strip or any other; flexible or rigid; capable of being shaped to constitute packaging; having, in any case, a certain mechanical strength.
  • the support sheet 1 comprises a single layer or, on the contrary, several layers. It is homogeneous or heterogeneous. It is impermeable to gas and / or water vapor or, on the contrary, permeable to gas and / or water vapor. It is continuous or, on the contrary, discontinuous. It is provided with perforations or microperforations 4 with or without removal of materials or, on the contrary, without such perforations.
  • the material constituting the support sheet 1 is preferably chosen from the group comprising paper, cellulose films, regenerated pure cellulose, polymers, in particular, polyethylene, polypropylene, polyvinyl chloride, polyester.
  • the material constituting the support sheet is a polymer comprising micropores or having a certain permeability to water vapor.
  • the expression “support sheet 1 permeable to gas and / or water vapor” means a support sheet having a permeability to oxygen greater than 18 cm / m2. 24 hours and to water vapor more than 750 g / m2. 24 hours.
  • the expression "gas-tight and / or water-vapor-tight" support sheet is understood to mean a support sheet having a permeability at values lower than those mentioned above.
  • the support sheet 1 is itself associated with at least one other additional sheet, in particular an aluminum sheet.
  • the water-retaining material 2 may consist of a water-retaining resin chosen from the group formed by polyacrylonitriles or copolymers based on acrylonitriles treated with aqueous alkaline solutions of aliphatic or cycloaliphatic alcohols, mono or polyfunctional, of higher melting point or equal to about 110 ° C; polymers obtained by polymerization of starch in dispersion in water and of a saturated monomer having a melting point greater than or equal to about 100 ° C; polycarboxyalkil celluloses; metal salts of hydrolyzed starch copolymers; copolymers of acrylic acid and ⁇ -olefins, or styrenes, or substituted styrenes; and polysaccharide derivatives containing carboxylic groups.
  • a water-retaining resin chosen from the group formed by polyacrylonitriles or copolymers based on acrylonitriles treated with aqueous alkaline solutions of aliphatic or cycloalipha
  • such a water-retaining resin has the property of having a final weight after absorption of water equal to a large number of times the initial weight before absorption of water. This coefficient multiplying the weight of the water-retaining resin can, in particular, reach or exceed 400.
  • the water-retentant material 2 is chosen from the group consisting of reaction products of starch-polyacrylonitrile graft copolymers and of a polyfunctional alcohol; copolymers salified acrylic oligosaccharides; hydrocolloidal polyelectrolytes; starch, casein or similar products; polyalcohols, in particular glycerin; glycolic derivatives.
  • the water-retaining material 2 consists of cellulosic fibers, in particular such as cotton.
  • the water-retaining material 2 consists of mineral salts, in particular sodium chloride.
  • the water-retaining material 2 consists of one or more composites, in particular paper or a nonwoven.
  • the water-retaining material is generally in solid, homogeneous or heterogeneous form, depending on the composition.
  • the water-retaining material 2 also has the property of being able to be intimately and permanently associated with the support sheet so as to form a whole with the latter. In particular, the water-retaining material 2 remains associated with the support sheet 1, even after the absorption of water.
  • the water-retaining material 2 is associated with the support sheet 1 by being either incorporated therein, or superimposed thereon. In the latter case, the water-retaining material can be placed on one of the faces or on both sides of the support sheet 1.
  • the water-retaining material 2 is distributed generally continuously or, on the contrary, discontinuously, in particular by points, by lines, etc.
  • the amount of water-repellent material 2 is adapted to the amount of water to be absorbed and this according to the product to be packaged, according to well known knowledge of the skilled person.
  • the means of association 3 of the water-retaining material 2 with the support sheet 1 have the function of ensuring cohesion of the material, even after the water-retentive material has absorbed a quantity of water which can be very large.
  • the association means 3 can also be the subject of several alternative embodiments. They can be formed by the water-retaining material itself having a certain tackiness or can be constituted by an additional material, such as an adjuvant.
  • the different variants of the support sheet 1, of the water-retaining material 2 and of the association means 3 can be combined with one another.
  • the material according to the invention may comprise the combination of several of the constituent means described above, for example several materials constituting the support sheet and / or several water-retaining materials and / or several means of association.
  • the material thus produced is in the form of a single layer.
  • this layer may itself include one or more support sheets and / or one or more water-retaining materials.
  • the material may comprise several elementary layers thus defined, these layers being associated intimately with one another or not.
  • FIG. 1 represents an elementary embodiment of the invention consisting of a support sheet 1, comprising perforations 4, intimately associated with a water-repellent material 2 by means of association 3.
  • FIG. 2 represents a second variant of the invention consisting of two support sheets, namely an aluminum sheet 5 and a support sheet 1, the latter being intimately associated with a water-retaining material 2 by means of association 3.
  • FIG. 3 represents a third variant of the invention consisting of two support sheets 1 intimately associated, respectively, with the upper and lower faces of a water-retaining material 2 by association means 3.
  • FIG. 4 represents a fourth variant of the invention made up of the superposition of two elementary layers of material according to FIG. 1, themselves intimately associated by association means 3.
  • the invention also relates to a method of manufacturing a material as it has just been defined.
  • a support sheet 1 and from a water-repellent material 2, as defined above and is closely associated with each other, thanks to the association means 3.
  • These association means 3 mainly use an adhesive power, either of the water-retaining material, or, as already indicated, of additional materials.
  • This material having this tackiness is either sprayed, or coated on the support sheet of and / or the water-retaining material or else intimately mixed with the water-retaining material 2, in particular with a varnish or an ink.
  • the spraying or coating is carried out continuously or even locally, in particular by points or by lines.
  • the invention also relates to a packaging of a product sensitive to humidity, as already indicated, using the material described above.
  • Such packaging may include at least one layer of such a material arranged to form a package by means of at least one fold 7 and / or a curvature. This layer has characteristics such that it can be welded and / or glued on itself, so as to form a package which can be hermetic at the place of its closure.
  • the packaging has a first part made of thermoformed synthetic material and sealed with a second material, one of the two or both as defined above.
  • the invention is more particularly intended for a product sensitive to humidity and in particular to a food product. Tests have made it possible to show that, in the case of a product such as soft cheese, the use of the material according to the invention makes it possible to extend the life of the cheese while improving its taste properties. In the case of flowers, the material according to the invention makes it possible to maintain the relative humidity inside the packaging by returning water. In the case of meat, or similar products, the invention makes it possible to absorb the juices or exudates from the product, while improving the appearance of the product. In the case of dry cookies, the invention makes it possible to keep the cookies their outfit or their crunchy character, by preventing them from becoming soft. In the case of the packaging of electrical parts, the use of the material according to the invention makes it possible to avoid oxidation.
  • the first embodiment consists of a material of which the support sheet 1 is a paper, the water-retaining material 2 is a polymer, the support sheet 1 and the water-retentive material 2 being combined in the following manner: the inner face of the paper is coated with water-repellent powder, itself bonded with discontinuously, namely by lines, by a cellulose derivative.
  • the material comprises a support which is made up of two layers, namely, a polypropylene film and a waxed paper, and a water-retaining material which is a tissue paper coated with acrylonitrile resin.
  • a support which is made up of two layers, namely, a polypropylene film and a waxed paper, and a water-retaining material which is a tissue paper coated with acrylonitrile resin.
  • the association is carried out in the following way: the muslin coated with acrylonitrile resin is fixed on the support cited by a resin, namely a cellulose derivative, allowing discontinuous bonding by lines, of the water-repellent material to the polypropylene film for the top and with waxed paper in contact with the product, for the underside.
  • the support sheet is a paper of 40 g per m2 and 40 microns thick.
  • the water-retaining material is a polyacrynonitryl resin manufactured by the company NORSOLOR under the brand AQUAKEEP 10 SH. This polyacrynonitryl resin and this paper were combined with one another by spraying the resin onto the paper, in amounts which can vary from 3 to 30 g of resin per m2 of paper and bonding using a sticky adjuvant such as a cellulose derivative.
  • a cellulose derivatives have been used: ethyl, hydroxyethyl cellulose.
  • the material thus produced was applied to soft cheeses, as well as pressed cheeses. It allowed a recovery of 30% in water compared to the initial weight of the packaging and the maintenance of a balance in terms of the open water (AW) activity of the cheese.
  • AW open water
  • a material comprising a support sheet according to Example 1, associated with a water-retaining material, namely cellulosic fibers derived from cotton, having a maximum length of the order of 6 mm. These cellulosic fibers are pulverized at the rate of 10 to 15 g of fibers per m2 of paper and glued continuously using a permanent adhesive such as MV7OH resin from WAKER.
  • a material was produced comprising a support sheet according to Example 1, associated with a water-retaining material, namely, a mineral salt in the form of powder, for example sodium chloride.
  • This sodium chloride powder having particles of approximately 6 microns is sprayed at the rate of 3 g per m2 of paper, and stuck continuously using a permanent adhesive, in the form of an emulsion, namely the resin.
  • MV 70H from WAKER.
  • the use of such a material allows the absorption and fixation of humidity of the order of 10% of the initial weight of the material, as well as a regulation of the diffusion of humidity.
  • a material was produced comprising a support sheet, namely a non-woven composite of 30 g per m2, consisting of synthetic and cellulosic fibers (NH 12 + NH 22 from the company BOLLORE), associated with a water-repellent material, according to the example. 1.
  • a material was produced comprising a support sheet according to Example 4, associated with a water-retaining material, according to Example 2.
  • a material was produced comprising a support sheet according to Example 4, associated with a water-retaining material, according to Example 3.
  • a material was produced comprising a support sheet, namely an LMS cellulosic film at a rate of 33.5 g per m2 (PVE AFNOR N 600 g per m2 24 hours) associated with a water-retaining material, namely, a crosslinked starch (DEXYLOSE 230, reference 3 122 6 L, from ROQUETTE).
  • a support sheet namely an LMS cellulosic film at a rate of 33.5 g per m2 (PVE AFNOR N 600 g per m2 24 hours) associated with a water-retaining material, namely, a crosslinked starch (DEXYLOSE 230, reference 3 122 6 L, from ROQUETTE).
  • This crosslinked starch is sprayed at a rate of 3 g / m2 on the cellulosic film and stuck to it continuously by means of an adjuvant, such as a cellulose derivative (nitrocellulose).
  • an adjuvant such as a cellulose derivative (nitrocellulose).
  • a material comprising a support sheet, namely polyvinyl chloride of approximately 34 g per m2, associated with a water-retaining material, namely a polyacrylonitrile resin of the order of 3 to 30 g per m2.
  • This polyacrylonitrile resin is sprayed onto the polyvinyl chloride and bonded to it using an adjuvant, namely an acrylic derivative fixing the polyacrylonitrile resin.
  • an adjuvant namely an acrylic derivative fixing the polyacrylonitrile resin.
  • the use of such a material made it possible to store 20% of the initial water weight of the material. The application was carried out for packaging fragile mechanical parts with water.
  • a material was produced comprising a support sheet, namely polypropylene of the order of 18 to 20 g per m2, associated with a water-repellent material, according to Example 8.
  • the association of this polypropylene and of this polyacrylonitrile resin is performed according to example 8.
  • a material was produced comprising a support sheet, namely base density polyethylene, of the order of 20 microns, associated with a water-retaining material according to Example 2.
  • a material was produced comprising a double support, namely an aluminum sheet 15 microns thick, complexed with paper of about 40 g, this support being associated with a water-repellent material, according to Example 1.
  • the polyacrylonitrile is dispersed with the adhesive, namely vinyl polymer, so as to achieve the association of polyacrylonitrile with paper.
  • a material was produced comprising a double support, namely an aluminum sheet 15 microns thick complexed with a cellulosic film according to Example 7, this support being associated with a water-retaining material, according to Example 7.
  • the water-retaining material is placed and glued continuously according to Example 11 between the aluminum foil and the cellulosic film.
  • a material comprising a double support consisting of an aluminum sheet 15 microns thick, complexed with a polypropylene, associated with a water-retaining material, namely casein.
  • the casein is sprayed, at a rate of 10 g per m2, onto the polypropylene and stuck continuously using a permanent adhesive, such as the MV 7OH resin from WAKER.
  • a material was produced comprising a support sheet, namely an aluminum sheet 100 microns thick, associated with a water-retaining material, namely crosslinked starch, according to Example 7.
  • This crosslinked starch is pulverized at the rate of 6 g per m2 of aluminum and bonded continuously using a vinyl acetate.
  • stampable material is carried out for sterilized pies and dry biscuits.
  • a material was produced comprising a support layer consisting of a nonwoven composite at a rate of 31 g per m2 complexed with a tissue paper at a rate of 18 to 25 g per m2 (KB 20 g from METNETT), associated with a material water-repellent, namely a polyacrylonitrile resin.
  • the water-retaining material is sprayed, at a rate of 3 to 30 g per m2 between the two layers and fixed by bonding, due to the water-retaining material itself, previously lightly impregnated with water.
  • a material was produced comprising a support consisting of an LMS cellulosic film (PVE AFNOR 600 g per m2 24 hours) of the order of 33 g per m2 complexed with a nonwoven according to Example 4, this support being associated with a water-retaining material, namely polyacrylonitrile resin according to Example 1.
  • LMS cellulosic film PVE AFNOR 600 g per m2 24 hours
  • the polyacrylonitrile resin is sprayed, at a rate of 3 g per m2 of nonwoven and bonded thereto by lines of glue, with a permanent adhesive such as the MV 7OH resin from WAKER.
  • a material was produced comprising a support according to Example 16, associated with a water-retaining material, according to Example 7.
  • a material comprising a support consisting of a layer of cellulosic film (WSZB) and a layer of 40 g paraffin paper, at a rate of 5 to 8 g per m2, this support being associated with a water-retaining material, namely tissue paper (KB 20 g from the company METNETT), at a rate of 18 to 25 g per m2.
  • WSZB cellulosic film
  • 40 g paraffin paper namely tissue paper (KB 20 g from the company METNETT)
  • This tissue paper is sprayed between the two layers constituting the support and glued to it continuously with wax at the rate of 4.5 g per m2.
  • Such a material has been produced for soft cheeses and morge rind.
  • a material comprising a support consisting of two layers, the first is microperforated or perforated polypropylene, the pores having a diameter of 0.9 mm, the other layer being made of 40 g paper and waxed, at a rate of 5 to 8 g per m2, this support being associated to a water-repellent material, according to Example 18.
  • the water-retaining material is associated with the two layers forming the support by bonding, discontinuously, namely by lines, with wax, at a rate of 4.5 g per m2.
  • a material was produced comprising a support consisting of two layers, one being microperforated polyvinyl chloride, the other layer consisting of 40 g paraffin paper, at a rate of 5 to 8 g per m2, this support being associated with a water-retaining material, according to Example 18.
  • the water-repellent material is associated with the two layers by full-sheet bonding with wax, at the rate of 4.5 g per m2.

Abstract

L'invention est relative à l'emballage d'un produit sensible à l'humidité.The invention relates to the packaging of a product sensitive to humidity.

Il est constitué en combinaison d'au moins une feuille support 1 et d'au moins une matière hydrorétentrice 2, associée intérieurement par des moyens d'association 3 à la feuille support. La fonction de ce matériau est de régler l'humidité et/ou l'exsudat provenant du produit.

Figure imgaf001
It consists of a combination of at least one support sheet 1 and at least one water-retaining material 2, associated internally by means of association 3 with the support sheet. The function of this material is to regulate the humidity and / or exudate from the product.
Figure imgaf001

Description

L'invention concerne un materiau destiné à l'emballage d'un produit sensible à l'humidité, un procédé de fabrication d'un tel matériau et un emballage comportant un tel matériau.The invention relates to a material intended for the packaging of a product sensitive to humidity, a method of manufacturing such a material and a packaging comprising such a material.

Plus précisément, l'invention s'intéresse à des matériaux sous forme générale de feuilles, plus particulièrement destinés à l'emballage de produits tels que les fromages, les viandes, etc. Un tel emballage a pour fonction de protéger le produit emballé de l'atmosphère ambiante extérieure, ainsi que des contacts intempestifs. Un tel emballage a également pour fonction d'avoir une perméabilité sélective au gaz et à l'humidité, compte tenu des modifications que peut subir le produit emballé, susceptibles d'aller jusqu'à l'altération du produit, notamment de son goût.More specifically, the invention relates to materials in the general form of sheets, more particularly intended for the packaging of products such as cheeses, meats, etc. The function of such packaging is to protect the packaged product from the outside ambient atmosphere, as well as from untimely contacts. Such packaging also has the function of having a selective permeability to gas and to humidity, taking into account the modifications that the packaged product may undergo, likely to go as far as altering the product, in particular its taste.

Enfin, et ainsi qu'il est mentionné ci-dessous, un tel emballage a pour fonction de régler l'humidité et/ou l'exsudat provenant du produit emballé.Finally, and as mentioned below, the function of such packaging is to regulate the humidity and / or exudate from the packaged product.

On connaît déjà des emballages ayant comme objectif annoncé de répondre à ces exigences. Ainsi, dans une première forme de réalisation connue (brevet français No 1 433 389), un emballage de viande comporte une base formée d'une feuille unique de fibres cellulosiques, notamment du papier, et un agent imperméable à l'eau placé sur la face externe de la feuille de fibres cellulosiques ou l'imprégnant au moins partiellement. L'agent imperméable à l'eau peut-être une résine uréeformol. Selon ce brevet, un tel emballage est résistant à l'humidité, tout en laissant passer au moins partiellement les liquides aqueux à travers les fibres. Toutefois, un tel emballage ne permet pas de remplir la fonction d'échanges gazeux réciproque entre le produit emballé et l'atmosphère ambiante extérieure, du fait de la présence de l'agent imperméable. Un tel emballage ne permet pas davantage de remplir la fonction d'absorption de l'humidité provenant du produit emballé, si ce n'est de façon très limitée.Packages are already known with the stated objective of meeting these requirements. Thus, in a first known embodiment (French patent No. 1,433,389), a meat packing includes a base formed of a single sheet of cellulosic fibers, in particular paper, and a waterproof agent placed on the external face of the sheet of cellulosic fibers or impregnating it at least partially. The waterproof agent may be a ureaformol resin. According to this patent, such a package is resistant to humidity, while at least partially allowing aqueous liquids to pass through the fibers. However, such packaging does not fulfill the function of reciprocal gas exchanges between the packaged product and the external ambient atmosphere, due to the presence of the impermeable agent. Nor does such packaging fulfill the function of absorbing moisture. from the packaged product, if not to a very limited extent.

Dans une deuxième forme de réalisation (brevet anglais No 696 373), l'emballage comprend une couche de fibres absorbant l'humidité, notamment du papier, et un film résistant à l'humidité, pourvu de petites perforations (résine synthétique). Un tel emballage peut être placé sur de la viande à emballer, dans un sens ou dans l'autre. Toutefois, l'emballage décrit dans ce brevet est d'application limitée à la viande, et sans doute d'efficacité limitée.In a second embodiment (British Patent No. 696 373), the package comprises a layer of moisture-absorbent fibers, in particular paper, and a film resistant to moisture, provided with small perforations (synthetic resin). Such packaging can be placed on meat to be wrapped, one way or the other. However, the packaging described in this patent is of application limited to meat, and undoubtedly of limited effectiveness.

Dans une troisième forme de réalisation (brevet français No 875 277), il est prévu un emballage comportant une feuille ou bande de métal revêtue d'une feuille mince thermoplastique, susceptible d'absorber de l'humidité ou un liquide en gonflant. Un emballage ainsi réalisé est étanche mais permet essentiellement de réaliser un contenant du type "boîte de conserves".In a third embodiment (French patent No. 875 277) there is provided a package comprising a sheet or strip of metal coated with a thermoplastic foil, capable of absorbing moisture or swelling in the liquid. A packaging thus produced is waterproof but essentially makes it possible to produce a container of the "tin can" type.

L'invention a pour but un matériau destiné à la réalisation d'un emballage pour produits sensibles à l'humidité, susceptible de contrôler l'humidité de l'atmosphère entourant le produit ainsi emballé.The object of the invention is a material intended for producing a packaging for products sensitive to humidity, capable of controlling the humidity of the atmosphere surrounding the product thus packaged.

A cet effet, l'invention propose un matériau qui est constitué en conbinaison d'au moins une feuille support et d'au moins une matière hydrorétentrice associée intimement à la feuille support, par des moyens d'association. Un tel matériau est destiné à l'emballage d'un produit alimentaire ou autre, sensible à l'humidité, et a pour fonction de régler l'humidité et/ou l'exsudat provenant du produit ainsi emballé.To this end, the invention provides a material which consists of a combination of at least one support sheet and at least one water-retaining material intimately associated with the support sheet, by means of association. Such a material is intended for packaging a food or other product, sensitive to humidity, and has the function of regulating the humidity and / or the exudate coming from the product thus packaged.

L'humidité et/ou l'exsudat provenant du produit emballé est absorbé et retenu par la matière hydrorétentrice, sans affecter les qualités physiques de la feuille support, notamment sa tenue, et sans affecter le produit emballé soi-même. De plus, du fait de sa constitution, le matériau selon l'invention est susceptible d'une certaine désorption, l'absorption et la désorption étant fonction de l'humidité et de la température régnant à l'intérieur de l'emballage et de celle régnant dans l'atmosphère ambiante extérieure.The moisture and / or exudate from the packaged product is absorbed and retained by the water-retaining material, without affecting the physical qualities of the support sheet, in particular its behavior, and without affecting the packaged product itself. In addition, due to its constitution, the material according to the invention is capable of a certain desorption, the absorption and desorption being a function of the humidity and the temperature prevailing inside the packaging and of that prevailing in the ambient atmosphere outside.

L'invention peut faire l'objet de différentes variantes : la feuille support peut être en couche unique ou en plusieurs couches ; étanche au gaz et/ou à la vapeur d'eau, ou, au contraire, perméable. La matière hydrorétentrice peut être incorporée ou superposée à la feuille support. La matière hydrorétentrice elle-même peut être constituée par une résine ou par une autre matière. Le matériau ainsi réalisé peut comporter une ou plusieurs couches.The invention can be the subject of different variants: the support sheet can be in a single layer or in several layers; impervious to gas and / or water vapor, or, on the contrary, permeable. The water-retaining material can be incorporated or superimposed on the support sheet. The water-retaining material itself can be made of a resin or another material. The material thus produced may comprise one or more layers.

Les autres caractéristiques de l'invention résulteront de la description qui suivra en référence aux desssins annexés dans lesquels :
. Les figures 1, 2, 3, 4 sont quatre vues schématiques en coupe transversale illustrant quatre modes de réalisation du matériau selon l'invention.
. La figure 5 est une vue schématique en perspective d'un emballage réalisé à partir du matériau.The other characteristics of the invention will emerge from the description which follows with reference to the appended drawings in which:
. Figures 1, 2, 3, 4 are four schematic views in cross section illustrating four embodiments of the material according to the invention.
. Figure 5 is a schematic perspective view of a package made from the material.

L'invention concerne un matériau destiné à l'emballage d'un produit ; un procédé de fabrication d'un tel matériau ; et un emballage comportant un tel matériau, destiné à ce produit.The invention relates to a material for packaging a product; a method of manufacturing such a material; and a packaging comprising such a material, intended for this product.

Le produit en soi, auquel est destiné l'emballage, ne fait pas directement l'objet de l'invention. Il s'agit préférentiellement d'un produit sensible à l'humidité, l'emballage ayant pour fonction de régler l'humidité et/ou l'exsudat provenant de ce produit, une fois emballé. Un tel produit peut être un produit alimentaire, tel que du fromage, de la viande, du poisson, des biscuits on un autre produit vivant tel que des fleurs ou enfin, des produits tels que des pièces mécaniques, électroniques ou électriques.The product per se, for which the packaging is intended, is not directly the subject of the invention. It is preferably a product sensitive to humidity, the packaging having the function of regulating the humidity and / or the exudate coming from this product, once packaged. Such a product can be a food product, such as cheese, meat, fish, cookies or another living product such as flowers or finally, products such as mechanical, electronic or electrical parts.

Le matériau selon l'invention est caractérisé par le fait qu'il comporte en combinaison au moins une feuille support 1 et au moins une matière hydrorétentrice 2 associée intimement à la feuille support par des moyens d'association 3.The material according to the invention is characterized in that it comprises in combination at least one support sheet 1 and at at least one water-repellent material 2 intimately associated with the support sheet by association means 3.

Un tel matériau permet la réalisation d'un emballage pour le produit mentionné ci-dessus et sa fonction est de régler l'humidité et/ou l'exsudat provenant du produit.Such a material allows the realization of a packaging for the product mentioned above and its function is to regulate the humidity and / or the exudate coming from the product.

La feuille support 1 du matériau selon l'invention a essentiellement pour fonction d'assurer une tenue physique du matériau, ainsi que de constituer un support pour la matière hydrorétentrice.The support sheet 1 of the material according to the invention essentially has the function of ensuring a physical hold of the material, as well as of constituting a support for the water-retaining material.

Le matériau selon l'invention peut faire l'objet de plusieurs variantes de réalisation. Ces variantes de réalisation découlent des variantes de réalisation de la feuille support 1, la matière hydrorétentrice 2, les moyens d'association 3, ainsi que de la constitution même du matériau. Ces différentes variantes dans la réalisation des moyens constitutifs du matériau peuvent être combinées les unes avec les autres.The material according to the invention can be the subject of several variant embodiments. These alternative embodiments arise from the alternative embodiments of the support sheet 1, the water-retaining material 2, the association means 3, as well as from the very constitution of the material. These different variants in the production of the constituent means of the material can be combined with one another.

La feuille support 1 est en général un élément plat ; en forme de plaque, de nappe, de bande ou tout autre ; souple ou rigide ; susceptible d'être conformée pour constituer un emballage ; présentant, en toute occurrence, une certaine tenue mécanique. La feuille support 1 comporte une couche unique ou, au contraire, plusieurs couches. Elle est homogène ou hétérogène. Elle est étanche au gaz et/ou à la vapeur d'eau ou, au contraire, perméable au gaz et/ou à la vapeur d'eau. Elle est continue ou, au contraire, discontinue. Elle est pourvue de perforations ou microperforations 4 avec ou sans enlèvement de matières ou, au contraire, dépourvue de telles perforations.The support sheet 1 is generally a flat element; in the form of a plate, tablecloth, strip or any other; flexible or rigid; capable of being shaped to constitute packaging; having, in any case, a certain mechanical strength. The support sheet 1 comprises a single layer or, on the contrary, several layers. It is homogeneous or heterogeneous. It is impermeable to gas and / or water vapor or, on the contrary, permeable to gas and / or water vapor. It is continuous or, on the contrary, discontinuous. It is provided with perforations or microperforations 4 with or without removal of materials or, on the contrary, without such perforations.

La matière constituant la feuille support 1 est préférentiellement choisie dans le groupe comprenant le papier, les pellicules cellulosiques, la cellulose pure régénérée, les polymères, notamment, le polyéthylène, le polypropylène, le chlorure de polyvinyle, le polyester.The material constituting the support sheet 1 is preferably chosen from the group comprising paper, cellulose films, regenerated pure cellulose, polymers, in particular, polyethylene, polypropylene, polyvinyl chloride, polyester.

En particulier, la matière constituant la feuille support est un polymère comportant des micropores ou présentant une certaine perméabilité à la vapeur d'eau.In particular, the material constituting the support sheet is a polymer comprising micropores or having a certain permeability to water vapor.

Selon l'invention, on entend par feuille support 1 perméable au gaz et/ou à la vapeur d'eau, une feuille support présentant une perméabilité à l'oxygène supérieure à 18 cm /m² .24 heures et à la vapeur d'eau supérieure à 750 g /m². 24 heures. On entend par feuille support étanche au gaz et/ou à la vapeur d'eau une feuille support présentant une perméabilité à des valeurs inférieures à celles mentionnées ci-dessus.According to the invention, the expression “support sheet 1 permeable to gas and / or water vapor” means a support sheet having a permeability to oxygen greater than 18 cm / m². 24 hours and to water vapor more than 750 g / m². 24 hours. The expression "gas-tight and / or water-vapor-tight" support sheet is understood to mean a support sheet having a permeability at values lower than those mentioned above.

Selon une autre variante possible de l'invention, la feuille support 1 est elle-même associée à au moins une autre feuille supplémentaire, notamment une feuille d'aluminium.According to another possible variant of the invention, the support sheet 1 is itself associated with at least one other additional sheet, in particular an aluminum sheet.

La matière hydrorétentrice 2 peut être constituée par une résine hydrorétentrice choisie dans le groupe formé par des polyacrylonitriles ou des copolymères à base d'acrylonitriles traités par des solutions aqueuses alcalines d'alcools aliphatiques ou cycloaliphatiques, mono ou polyfonctionnels, de point de fusion supérieur ou égal à environ 110° C ; des polymères obtenus par polymèrisation d'amidon en dispersion dans l'eau et d'un monomère saturé ayant un point de fusion supérieur ou égal à environ 100° C ; des polycarboxyalkil celluloses ; des sels métalliques de copolymères d'amidon hydrolysé ; des copolymères d'acide acrylique et d'α-oléfines, ou de styrènes, ou de styrènes substitués ; et des dérivés polysaccharides contenant des groups carboxyliques.The water-retaining material 2 may consist of a water-retaining resin chosen from the group formed by polyacrylonitriles or copolymers based on acrylonitriles treated with aqueous alkaline solutions of aliphatic or cycloaliphatic alcohols, mono or polyfunctional, of higher melting point or equal to about 110 ° C; polymers obtained by polymerization of starch in dispersion in water and of a saturated monomer having a melting point greater than or equal to about 100 ° C; polycarboxyalkil celluloses; metal salts of hydrolyzed starch copolymers; copolymers of acrylic acid and α-olefins, or styrenes, or substituted styrenes; and polysaccharide derivatives containing carboxylic groups.

Plus généralement, une telle résine hydrorétentrice a la propriété d'avoir un poids final après absorption d'eau égal à un grand nombre de fois le poids initial avant absorption d'eau. Ce coefficient multiplicateur du poids de la résine hydrorétentrice peut, notamment, atteindre ou dépasser 400.More generally, such a water-retaining resin has the property of having a final weight after absorption of water equal to a large number of times the initial weight before absorption of water. This coefficient multiplying the weight of the water-retaining resin can, in particular, reach or exceed 400.

Dans une deuxième variante de réalisation, la matière hydrorétentrice 2 est choisie dans le groupe constitué par des produits de réaction de copolymères greffés amidon-polyacrylo­nitriles et d'un alcool polyfonctionnel; des copolymères oligosaccharides-acryliques salifiés ; des polyélectrolytes hydrocolloidaux ; des produits à base d'amidon, de caséine ou produits similaires ; des polyalcools, notamment de la glycérine; des dérivés glycoliques.In a second alternative embodiment, the water-retentant material 2 is chosen from the group consisting of reaction products of starch-polyacrylonitrile graft copolymers and of a polyfunctional alcohol; copolymers salified acrylic oligosaccharides; hydrocolloidal polyelectrolytes; starch, casein or similar products; polyalcohols, in particular glycerin; glycolic derivatives.

Dans une troisième variante de réalisation, la matière hydrorétentrice 2 est constituée de fibres cellulosiques, notamment telles que du coton.In a third alternative embodiment, the water-retaining material 2 consists of cellulosic fibers, in particular such as cotton.

Dans une quatrième variante de réalisation, la matière hydrorétentrice 2 est constituée par des sels minéraux, notamment du chlorure de sodium.In a fourth alternative embodiment, the water-retaining material 2 consists of mineral salts, in particular sodium chloride.

Enfin, dans une cinquième et dernière variante de réalisation possible, la matière hydrorétentrice 2 est constituée par un ou plusieurs composites, notamment du papier ou un non-tissé.Finally, in a fifth and last possible alternative embodiment, the water-retaining material 2 consists of one or more composites, in particular paper or a nonwoven.

La matière hydrorétentrice est généralement sous forme solide, homogène ou hétérogène, selon la composition.The water-retaining material is generally in solid, homogeneous or heterogeneous form, depending on the composition.

La matière hydrorétentrice 2 a également comme propriété de pouvoir être associée intimement et à demeure à la feuille support de manière à former un tout avec celle-ci. En particulier, la matière hydrorétentrice 2 reste associée à la feuille support 1, même après l'absorption d'eau.The water-retaining material 2 also has the property of being able to be intimately and permanently associated with the support sheet so as to form a whole with the latter. In particular, the water-retaining material 2 remains associated with the support sheet 1, even after the absorption of water.

La matière hydrorétentrice 2 est associée à la feuille support 1 en étant soit incorporée à celle-ci, soit superposée sur celle-ci. Dans ce dernier cas, la matière hydrorétentrice peut être placée sur l'une des faces ou sur les deux faces de la feuille support 1.The water-retaining material 2 is associated with the support sheet 1 by being either incorporated therein, or superimposed thereon. In the latter case, the water-retaining material can be placed on one of the faces or on both sides of the support sheet 1.

La matière hydrorétentrice 2 est répartie de façon généralement continue ou, au contraire, de façon discontinue, notamment par points, par raies, etc.The water-retaining material 2 is distributed generally continuously or, on the contrary, discontinuously, in particular by points, by lines, etc.

La quantité de matière hydrorétentrice 2 est adaptée à la quantité d'eau devant être absorbée et ceci en fonction du produit à emballer, selon des connaissances bien connues de l'homme de métier.The amount of water-repellent material 2 is adapted to the amount of water to be absorbed and this according to the product to be packaged, according to well known knowledge of the skilled person.

Les moyens d'association 3 de la matière hydrorétentrice 2 à la feuille support 1 ont pour fonction d'assurer une cohésion du matériau y compris une fois que la matière hydrorétentrice a absorbé une quantité d'eau pouvant être très importante.The means of association 3 of the water-retaining material 2 with the support sheet 1 have the function of ensuring cohesion of the material, even after the water-retentive material has absorbed a quantity of water which can be very large.

Les moyens d'association 3 peuvent également faire l'objet de plusieurs variantes de réalisation. Ils peuvent être constitués par la matière hydrorétentrice elle-même présentant un certain pouvoir collant ou être constitués par une matière additionnelle, telle qu'un adjuvant.The association means 3 can also be the subject of several alternative embodiments. They can be formed by the water-retaining material itself having a certain tackiness or can be constituted by an additional material, such as an adjuvant.

La mise en oeuvre de ces moyens d'association est décrite ultérieurement en référence au procédé de fabrication du matériau selon l'invention.The implementation of these association means is described later with reference to the method of manufacturing the material according to the invention.

Ainsi qu'il a été déjà mentionné précédemment, les différentes variantes de la feuille support 1, de la matière hydrorétentrice 2 et des moyens d'association 3 peuvent être combinées les unes avec les autres. De plus, le matériau selon l'invention peut comporter la combinaison de plusieurs des moyens constitutifs décrits précédemment par exemple plusieurs matières constituant la feuille support et/ou plusieurs matières hydrorétentrices et/ou plusieurs moyens d'association.As already mentioned previously, the different variants of the support sheet 1, of the water-retaining material 2 and of the association means 3 can be combined with one another. In addition, the material according to the invention may comprise the combination of several of the constituent means described above, for example several materials constituting the support sheet and / or several water-retaining materials and / or several means of association.

Dans sa variante de réalisation élémentaire, la plus simple, le matériau ainsi réalisé se présente sous la forme d'une couche unique. Toutefois, cette couche peut elle-même comporter une ou plusieurs feuilles support et/ou une ou plusieurs matières hydrorétentrices.In its simplest variant, the material thus produced is in the form of a single layer. However, this layer may itself include one or more support sheets and / or one or more water-retaining materials.

De plus, et en variante, le matériau peut comporter plusieurs couches élémentaires ainsi définies, ces couches étant associées intimement entre elles ou non.In addition, and as a variant, the material may comprise several elementary layers thus defined, these layers being associated intimately with one another or not.

La figure 1 représente un mode de réalisation élémentaire de l'invention constituée d'une feuille support 1, comportant des perforations 4, associée intimement à une matière hydrorétentrice 2 par des moyens d'association 3.FIG. 1 represents an elementary embodiment of the invention consisting of a support sheet 1, comprising perforations 4, intimately associated with a water-repellent material 2 by means of association 3.

La figure 2 représente une seconde variante de l'invention constituée de deux feuilles support, à savoir une feuille d'aluminium 5 et une feuille support 1, celle-ci étant associée intimement à une matière hydrorétentrice 2 par des moyens d'association 3.FIG. 2 represents a second variant of the invention consisting of two support sheets, namely an aluminum sheet 5 and a support sheet 1, the latter being intimately associated with a water-retaining material 2 by means of association 3.

La figure 3 représente une troisième variante de l'invention constiuée de deux feuilles support 1 associées intimement, respectivement, aux faces supérieure et inférieure d'une matière hydrorétentrice 2 par des moyens d'association 3.FIG. 3 represents a third variant of the invention consisting of two support sheets 1 intimately associated, respectively, with the upper and lower faces of a water-retaining material 2 by association means 3.

La figure 4 représente une quatrième variante de l'invention constituée de la superposition de deux couches élémentaires de matériau selon la figure 1, elles-mêmes associées intimement par des moyens d'association 3.FIG. 4 represents a fourth variant of the invention made up of the superposition of two elementary layers of material according to FIG. 1, themselves intimately associated by association means 3.

Des exemples donnés ci-dessous permettent d'illustrer diverses formes de réalisation possibles, mais non limitatives d'un tel matériau.Examples given below make it possible to illustrate various possible, but not limiting, embodiments of such a material.

L'invention concerne également un procédé de fabrication d'un matériau tel qu'il vient d'etre défini. Dans ce procédé, on part d'une feuille support 1 et d'une matière hydrorétentrice 2, telle qu'elles ont été définies précédemment et on les associe intimement à demeure l'une avec l'autre, grâce aux moyens d'association 3. Ces moyens d'association 3 mettent principalement en oeuvre un pouvoir collant, soit de la matière hydrorétentrice, soit, comme déjà indiqué, des matières supplémentaires. Cette matière présentant ce pouvoir collant est soit pulvérisée, soit enduite sur la feuille support de et/ou la matière hydrorétentrice ou encore mélangée intimement avec la matière hydrorétentrice 2, notamment avec un vernis ou une encre.The invention also relates to a method of manufacturing a material as it has just been defined. In this process, one starts from a support sheet 1 and from a water-repellent material 2, as defined above and is closely associated with each other, thanks to the association means 3. These association means 3 mainly use an adhesive power, either of the water-retaining material, or, as already indicated, of additional materials. This material having this tackiness is either sprayed, or coated on the support sheet of and / or the water-retaining material or else intimately mixed with the water-retaining material 2, in particular with a varnish or an ink.

La pulvérisation ou l'enduction est réalisée de façon continue ou encore de façon localisée, notamment par points ou par raies.The spraying or coating is carried out continuously or even locally, in particular by points or by lines.

L'invention concerne encore un emballage d'un produit sensible à l'humidité, comme déjà indiqué, mettant en oeuvre le matériau décrit précédemment. Un tel emballage (figure 5) peut comporter au moins une couche d'un tel matériau agencée pour former un paquet au moyen d'au moins un pliage 7 et/ou une courbure. Cette couche présente des caractéristiques telles qu'elle peut être soudée et/ou collée sur elle-même, de façon à former un paquet pouvant être hermétique à l'endroit de sa fermeture.The invention also relates to a packaging of a product sensitive to humidity, as already indicated, using the material described above. Such packaging (Figure 5) may include at least one layer of such a material arranged to form a package by means of at least one fold 7 and / or a curvature. This layer has characteristics such that it can be welded and / or glued on itself, so as to form a package which can be hermetic at the place of its closure.

Dans une autre variante possible, l'emballage présente une première partie en matériau synthétique thermoformée et operculée au moyen d'un second matériau, l'un des deux ou les deux tels que définis précédemment.In another possible variant, the packaging has a first part made of thermoformed synthetic material and sealed with a second material, one of the two or both as defined above.

Ainsi qu'on l'a déjà mentionné, l'invention est plus particulièrement destinée à un produit sensible à l'humidité et notamment à un produit alimentaire. Des essais ont permis de montrer que, dans le cas d'un produit tel que du fromage à pâte molle, l'emploi du matériau selon l'invention permet d'allonger la durée de vie du fromage tout en améliorant ses propriétés gustatives. Dans le cas des fleurs, le matériau selon l'invention permet le maintien de l'humidité relative à l'intérieur de l'emballage par restitution d'eau. Dans le cas de la viande, ou produits similaires, l'invention permet d'absorber les jus ou exsudats du produit, tout en améliorant l'aspect du produit. Dans le cas de biscuits secs, l'invention permet de garder aux biscuits leur tenue ou leur caractère craquant, en évitant qu'ils ne deviennent mous. Dans le cas de l'emballage de pièces électriques, la mise en oeuvre du matériau selon l'invention permet d'éviter l'oxydation.As already mentioned, the invention is more particularly intended for a product sensitive to humidity and in particular to a food product. Tests have made it possible to show that, in the case of a product such as soft cheese, the use of the material according to the invention makes it possible to extend the life of the cheese while improving its taste properties. In the case of flowers, the material according to the invention makes it possible to maintain the relative humidity inside the packaging by returning water. In the case of meat, or similar products, the invention makes it possible to absorb the juices or exudates from the product, while improving the appearance of the product. In the case of dry cookies, the invention makes it possible to keep the cookies their outfit or their crunchy character, by preventing them from becoming soft. In the case of the packaging of electrical parts, the use of the material according to the invention makes it possible to avoid oxidation.

Sans que ces variantes de réalisation soient limitatives, deux variantes particulières de réalisation du matériau qui vient d'être décrit ont été envisagées :Without these alternative embodiments being limiting, two particular alternative embodiments of the material which has just been described have been envisaged:

La première forme de réalisation consiste en un matériau dont la feuille support 1 est un papier, la matière hydrorétentrice 2 est un polymère, la feuille support 1 et la matière hydrorétentrice 2 étant associées de la manière suivante : la face intérieure du papier est enduite de poudre hydrorétentrice, elle-même collée de façon discontinue, à savoir par raies, par un dérivé cellulosique.The first embodiment consists of a material of which the support sheet 1 is a paper, the water-retaining material 2 is a polymer, the support sheet 1 and the water-retentive material 2 being combined in the following manner: the inner face of the paper is coated with water-repellent powder, itself bonded with discontinuously, namely by lines, by a cellulose derivative.

Dans une seconde forme de réalisation, le matériau comprend un support qui est constitué de deux couches, à savoir, un film de polypropylène et un papier paraffiné, et une matière hydrorétentrice qui est un papier mousseline enduit de résine acrylonitrile. L'association est réalisée de la manière suivante : la mousseline enduite de résine acrylonitrile est fixée sur le support cité par une résine, à savoir un dérivé cellulosique, permettant un collage discontinu par raies, de la matière hydrorétentrice au film polypropylène pour le dessus et au papier paraffiné au contact du produit, pour le dessous.In a second embodiment, the material comprises a support which is made up of two layers, namely, a polypropylene film and a waxed paper, and a water-retaining material which is a tissue paper coated with acrylonitrile resin. The association is carried out in the following way: the muslin coated with acrylonitrile resin is fixed on the support cited by a resin, namely a cellulose derivative, allowing discontinuous bonding by lines, of the water-repellent material to the polypropylene film for the top and with waxed paper in contact with the product, for the underside.

On décrira maintenant plusieurs exemples non limitatifs de réalisation de matériaux selon l'invention.We will now describe several nonlimiting examples of the production of materials according to the invention.

Exemple 1 : Example 1 :

On a réalisé un matériau selon l'invention présentant les caractéristiques suivantes : la feuille support est un papier de 40 g par m² et de 40 microns d'épaisseur. La matière hydrorétentrice est une résine polyacrynonitryle fabriquée par la Société NORSOLOR sous la marque AQUAKEEP 10 SH. Cette résine polyacrynonitryle et ce papier ont été associés entre eux par pulvérisation de la résine sur le papier, dans des quantités pouvant varier de 3 à 30 g de résine par m² de papier et collage à l'aide d'un adjuvant collant tel qu'un dérivé cellulosique. Plusieurs dérivés cellulosiques ont été utilisés : éthyl, hydroxyéthyl cellulose.A material was produced according to the invention having the following characteristics: the support sheet is a paper of 40 g per m² and 40 microns thick. The water-retaining material is a polyacrynonitryl resin manufactured by the company NORSOLOR under the brand AQUAKEEP 10 SH. This polyacrynonitryl resin and this paper were combined with one another by spraying the resin onto the paper, in amounts which can vary from 3 to 30 g of resin per m² of paper and bonding using a sticky adjuvant such as a cellulose derivative. Several cellulose derivatives have been used: ethyl, hydroxyethyl cellulose.

Le matériau ainsi réalisé a été appliqué à des fromages à pâte molle, ainsi qu'à des fromages à pâte pressée. Il a permis une reprise de 30 % en eau par rapport au poids initial de l'emballage et le maintien d'un équilibre au niveau de l'activité eau libre (AW) du fromage.The material thus produced was applied to soft cheeses, as well as pressed cheeses. It allowed a recovery of 30% in water compared to the initial weight of the packaging and the maintenance of a balance in terms of the open water (AW) activity of the cheese.

Exemple 2 : Example 2 :

Un matériau a été réalisé comportant une feuille support selon l'exemple 1, associée à une matière hydrorétentrice, à savoir des fibres cellulosiques dérivées du coton, ayant une longueur maximale de l'ordre de 6 mm. Ces fibres cellulosiques sont pulvérisées à raison de 10 à 15 g de fibres par m² de papier et collées de façon continue au moyen d'un adhésif permanent tel que la résine MV7OH de chez WAKER.A material was produced comprising a support sheet according to Example 1, associated with a water-retaining material, namely cellulosic fibers derived from cotton, having a maximum length of the order of 6 mm. These cellulosic fibers are pulverized at the rate of 10 to 15 g of fibers per m² of paper and glued continuously using a permanent adhesive such as MV7OH resin from WAKER.

La mise en oeuvre d'un tel matériau permet une fixation de l'humidité de l'ordre de 20 % du poids initial du matériau. Une application a été réalisée pour de la viande et des fleurs.The use of such a material allows a fixation of the humidity of the order of 20% of the initial weight of the material. An application has been made for meat and flowers.

Exemple 3 : Example 3 :

Un matériau a été réalisé comportant une feuille support selon l'exemple 1, associé à une matière hydrorétentrice, à savoir, un sel minéral sous forme de poudre, par exemple le chlorure de sodium.A material was produced comprising a support sheet according to Example 1, associated with a water-retaining material, namely, a mineral salt in the form of powder, for example sodium chloride.

Cette poudre de chlorure de sodium, ayant des particules d'environ 6 microns est pulvérisée à raison de 3 g par m² de papier, et collée de façon continue au moyen d'un adhésif permanent, sous forme d'émulsion, à savoir la résine MV 70H de chez WAKER. La mise en oeuvre d'un tel matériau permet l'absorption et la fixation d'humidité de l'ordre de 10 % du poids initial du matériau, ainsi qu'une régulation de la diffusion del'humidité.This sodium chloride powder, having particles of approximately 6 microns is sprayed at the rate of 3 g per m² of paper, and stuck continuously using a permanent adhesive, in the form of an emulsion, namely the resin. MV 70H from WAKER. The use of such a material allows the absorption and fixation of humidity of the order of 10% of the initial weight of the material, as well as a regulation of the diffusion of humidity.

Exemple 4 : Example 4 :

Un matériau a été réalisé comportant une feuille support, à savoir un composite non tissé de 30 g par m², constitué de fibres synthétiques et cellulosiques (NH 12 + NH 22 de la Société BOLLORE), associé à une matière hydrorétentrice, selon l'exemple 1.A material was produced comprising a support sheet, namely a non-woven composite of 30 g per m², consisting of synthetic and cellulosic fibers (NH 12 + NH 22 from the company BOLLORE), associated with a water-repellent material, according to the example. 1.

L'association du non tissé et de la résine polyacrylonitrile est réalisée selon l'exemple 3.The association of the nonwoven and of the polyacrylonitrile resin is carried out according to Example 3.

Exemple 5 : Example 5 :

Un matériau a été réalisé comportant une feuille support selon l'exemple 4, associé à une matière hydrorétentrice, selon l'exemple 2.A material was produced comprising a support sheet according to Example 4, associated with a water-retaining material, according to Example 2.

L'association du non tissé et des fibres cellulosiques est réalisée selon l'exemple 3.The association of the nonwoven and the cellulosic fibers is carried out according to Example 3.

Exemple 6 : Example 6 :

Un matériau a été réalisé comportant une feuille support selon l'exemple 4, associé à une matière hydrorétentrice, selon l'exemple 3.A material was produced comprising a support sheet according to Example 4, associated with a water-retaining material, according to Example 3.

De même, l'association de la feuille support et de la matière hydrorétentrice est réalisé conformément à l'exemple 3.Likewise, the combination of the support sheet and the water-retaining material is carried out in accordance with Example 3.

Exemple 7 : Example 7 :

Un matériau a été réalisé comportant une feuille support, à savoir une pellicule cellulosique LMS à raison de 33,5 g par m² (PVE AFNOR N 600 g par m² 24 heures) associée à une matière hydrorétentrice, à savoir, un amidon réticulé (DEXYLOSE 230, référence 3 122 6 L, de chez ROQUETTE).A material was produced comprising a support sheet, namely an LMS cellulosic film at a rate of 33.5 g per m² (PVE AFNOR N 600 g per m² 24 hours) associated with a water-retaining material, namely, a crosslinked starch (DEXYLOSE 230, reference 3 122 6 L, from ROQUETTE).

Cet amidon réticulé est pulvérisé à raison de 3 g/m² sur la pellicule cellulosique et collé à celle-ci de façon continue au moyen d'un adjuvant, tel qu'un dérivé cellulosique (nitrocellulose).This crosslinked starch is sprayed at a rate of 3 g / m² on the cellulosic film and stuck to it continuously by means of an adjuvant, such as a cellulose derivative (nitrocellulose).

La mise en oeuvre d'un tel matériau permet une fixation de l'humidité de l'ordre de 100 % du poids initial de la pellicule cellulosique. Une application a été réalisée pour les fromages.The use of such a material allows a fixation of the humidity of the order of 100% of the initial weight of the cellulosic film. An application has been made for cheeses.

Exemple 8 : Example 8 :

Un matériau a été réalisé comportant une feuille support, à savoir du chlorure de polyvinyle d'environ 34 g par m², associé à une matière hydrorétentrice, à savoir une résine polyacrylonitrile de l'ordre de 3 à 30 g par m².A material was produced comprising a support sheet, namely polyvinyl chloride of approximately 34 g per m², associated with a water-retaining material, namely a polyacrylonitrile resin of the order of 3 to 30 g per m².

Cette résine polyacrylonitrile est pulvérisée sur le chlorure de polyvinyle et collée à celui-ci à l'aide d'un adjuvant, à savoir un dérivé acrylique fixant la résine polyacrylonitrile. La mise en oeuvre d'un tel matériau a permis de stocker 20 % du poids d'eau initial du matériau. L'application a été réalisée pour l'emballage de pièces mécaniques fragiles à l'eau.This polyacrylonitrile resin is sprayed onto the polyvinyl chloride and bonded to it using an adjuvant, namely an acrylic derivative fixing the polyacrylonitrile resin. The use of such a material made it possible to store 20% of the initial water weight of the material. The application was carried out for packaging fragile mechanical parts with water.

Exemple 9 : Example 9 :

Un matériau a été réalisé comportant une feuille support, à savoir du polypropylène de l'ordre de 18 à 20 g par m², associé à une matière hydrorétentrice, selon l'exemple 8. L'association de ce polypropylène et de cette résine polyacrylonitrile est réalisée selon l'exemple 8.A material was produced comprising a support sheet, namely polypropylene of the order of 18 to 20 g per m², associated with a water-repellent material, according to Example 8. The association of this polypropylene and of this polyacrylonitrile resin is performed according to example 8.

La mise en oeuvre d'un tel matériau permet la fixation de l'humidité extérieure, afin que celle-ci ne pénètre pas dans l'atmosphère interne du paquet. Une application a été réalisée pour l'emballage de biscuits secs.The use of such a material allows the fixation of external moisture, so that it does not enter the internal atmosphere of the package. An application has been made for the packaging of dry cookies.

Exemple 10 : Example 10 :

Un matériau a été réalisé comportant une feuille support, à savoir du polyéthylène de base densité, de l'ordre de 20 microns, associé à une matière hydrorétentrice selon l'exemple 2.A material was produced comprising a support sheet, namely base density polyethylene, of the order of 20 microns, associated with a water-retaining material according to Example 2.

L'association du polyéthylène et des fibres cellulosiques est réalisée selon l'exemple 7.The association of polyethylene and cellulosic fibers is carried out according to Example 7.

Une application de ce matériau a été envisagée pour l'emballage de produits réalisant la fonction d'absorption au niveau de l'hygiène humaine.An application of this material has been envisaged for the packaging of products performing the absorption function in terms of human hygiene.

Exemple 11 : Example 11 :

Un matériau a été réalisé comportant un support double, à savoir une feuille d'aluminium de 15 microns d'épaisseur, complexée à du papier d'environ 40 g, ce support étant associé à une matière hydrorétentrice, selon l'exemple 1.A material was produced comprising a double support, namely an aluminum sheet 15 microns thick, complexed with paper of about 40 g, this support being associated with a water-repellent material, according to Example 1.

Le polyacrylonitrile est dispersé avec la colle, à savoir du polymère vinylique, de façon à réaliser l'association du polyacrylonitrile au papier.The polyacrylonitrile is dispersed with the adhesive, namely vinyl polymer, so as to achieve the association of polyacrylonitrile with paper.

La mise en oeuvre d'un tel matériau a été réalisée pour des fromages et des biscuits secs afin de permettre la protection vis-à-vis de l'humidité importante particulièrement dans les pays tropicaux (90 % d'humidité relative à 38° C).The implementation of such a material was carried out for cheeses and dry biscuits in order to allow protection against high humidity, particularly in tropical countries (90% relative humidity at 38 ° C ).

Exemple 12 : Example 12 :

Un matériau a été réalisé comportant un support double, à savoir une feuille d'aluminium de 15 microns d'épaisseur complexée à une pellicule cellulosique selon l'exemple 7, ce support étant associé à une matière hydrorétentrice, selon l'exemple 7.A material was produced comprising a double support, namely an aluminum sheet 15 microns thick complexed with a cellulosic film according to Example 7, this support being associated with a water-retaining material, according to Example 7.

Dans cette forme de réalisation, la matière hydrorétentrice se trouve disposée et collée de façon continue selon l'exemple 11 entre la feuille d'aluminium et la pellicule cellulosique.In this embodiment, the water-retaining material is placed and glued continuously according to Example 11 between the aluminum foil and the cellulosic film.

Un tel emballage a été réalisé pour la confiserie.Such packaging was produced for the confectionery.

Exemple 13 : Example 13 :

Un matériau a été réalisé comportant un support double constitué d'une feuille d'aluminium de 15 microns d'épaisseur, complexée à un polypropylène, associé à une matière hydrorétentrice, à savoir de la caséine.A material was produced comprising a double support consisting of an aluminum sheet 15 microns thick, complexed with a polypropylene, associated with a water-retaining material, namely casein.

La caséine est pulvérisée, à raison de 10 g par m², sur le polypropylène et collée de façon continue au moyen d'un adhésif permanent, tel que la résine MV 7OH de chez WAKER.The casein is sprayed, at a rate of 10 g per m², onto the polypropylene and stuck continuously using a permanent adhesive, such as the MV 7OH resin from WAKER.

La mise en oeuvre d'un tel matériau est réalisée pour le conditionnement de fromages à pâte molle ou à pâte préssée ou à croûte morgée.The use of such a material is carried out for the packaging of soft cheeses or pressed cheeses or with a morée rind.

Exemple 14 : Example 14 :

Un matériau a été réalisé comportant une feuille support, à savoir une feuille d'aluminium de 100 microns d'épaisseur, associée à une matière hydrorétentrice, à savoir de l'amidon réticulé, selon l'exemple 7.A material was produced comprising a support sheet, namely an aluminum sheet 100 microns thick, associated with a water-retaining material, namely crosslinked starch, according to Example 7.

Cet amidon réticulé est pulvérisé, à raison de 6 g par m² d'aluminium et collé de façon continue au moyen d'un vinyle acétate.This crosslinked starch is pulverized at the rate of 6 g per m² of aluminum and bonded continuously using a vinyl acetate.

La mise en oeuvre d'un tel matériau emboutissable est réalisée pour les camemberts stérilisés et les biscuits secs.The implementation of such a stampable material is carried out for sterilized pies and dry biscuits.

Exemple 15 : Example 15 :

Un matériau a été réalisé comportant une couche support constituée d'un composite non tissé à raison de 31 g par m² complexé à un papier mousseline à raison de 18 à 25 g par m² (KB 20 g de chez METNETT), associé à une matière hydrorétentrice, à savoir une résine polyacrylonitrile.A material was produced comprising a support layer consisting of a nonwoven composite at a rate of 31 g per m² complexed with a tissue paper at a rate of 18 to 25 g per m² (KB 20 g from METNETT), associated with a material water-repellent, namely a polyacrylonitrile resin.

La matière hydrorétentrice est pulvérisée, à raison de 3 à 30 g par m² entre les deux couches et fixée par collage, dû à la matière hydrorétentrice soi-même, préalablement légèrement imprégnée d'eau.The water-retaining material is sprayed, at a rate of 3 to 30 g per m² between the two layers and fixed by bonding, due to the water-retaining material itself, previously lightly impregnated with water.

La mise en oeuvre d'un tel matériau est réalisée pour l'absorption d'eau au cours du nettoyage ménager ou la protection de l'humidité dans l'hygiène humaine.The implementation of such a material is carried out for the absorption of water during household cleaning or the protection of moisture in human hygiene.

Exemple 16 : Example 16 :

Un matériau a été réalisé comportant un support constitué d'une pellicule cellulosique LMS (PVE AFNOR 600 g par m² 24 heures) de l'ordre de 33 g par m² complexé à un non tissé selon l'exemple 4, ce support étant associé à une matière hydrorétentrice, à savoir de la résine polyacrylonitrile selon l'exemple 1.A material was produced comprising a support consisting of an LMS cellulosic film (PVE AFNOR 600 g per m² 24 hours) of the order of 33 g per m² complexed with a nonwoven according to Example 4, this support being associated with a water-retaining material, namely polyacrylonitrile resin according to Example 1.

La résine polyacrylonitrile est pulvérisée, à raison de 3 g par m² de non tissé et collée sur celui-ci par raies de colle, par un adhésif permanent tel que la résine MV 7OH de chez WAKER.The polyacrylonitrile resin is sprayed, at a rate of 3 g per m² of nonwoven and bonded thereto by lines of glue, with a permanent adhesive such as the MV 7OH resin from WAKER.

La mise en oeuvre d'un tel matériau a été réalisée pour tapisser les boîtes rigides ou semi-rigides contenant des fromages à pâte molle.The implementation of such a material was carried out to line the rigid or semi-rigid boxes containing soft cheeses.

Exemple 17 : Example 17 :

Un matériau a été réalisé comportant un support selon l'exemple 16, associé à une matière hydrorétentrice, selon l'exemple 7.A material was produced comprising a support according to Example 16, associated with a water-retaining material, according to Example 7.

L'association de la matière hydrorétentrice au support est réalisée selon l'exemple 16.The association of the water-retaining material with the support is carried out according to Example 16.

La mise en oeuvre d'un tel matériau a été réalisée selon l'exemple 16.The implementation of such a material was carried out according to Example 16.

Exemple 18 : Example 18 :

Un matériau a été réalisé comportant un support constitué d'une couche d'une pellicule cellulosique (WSZB) et d'une couche d'un papier de 40 g paraffiné, à raison de 5 à 8 g par m², ce support étant associé à une matière hydrorétentrice, à savoir du papier mousseline (KB 20 g de la Société METNETT), à raison de 18 à 25 g par m².A material was produced comprising a support consisting of a layer of cellulosic film (WSZB) and a layer of 40 g paraffin paper, at a rate of 5 to 8 g per m², this support being associated with a water-retaining material, namely tissue paper (KB 20 g from the company METNETT), at a rate of 18 to 25 g per m².

Ce papier mousseline est pulvérisé entre les deux couches constituant le support et collé à celui-ci de façon continue avec de la cire à raison de 4,5 g par m².This tissue paper is sprayed between the two layers constituting the support and glued to it continuously with wax at the rate of 4.5 g per m².

Un tel matériau a été réalisé pour les fromages à pâte molle et à croûte morgée.Such a material has been produced for soft cheeses and morge rind.

Exemple 19 : Example 19 :

Un matériau a été réalisé comportant un support constitué de deux couches, la première est du polypropylène microperforé ou perforé, les pores ayant un diamètre de 0,9 mm, l'autre couche étant constituée de papier de 40 g et paraffiné, à raison de 5 à 8 g par m², ce support étant associé à une matière hydroréten­trice, selon l'exemple 18.A material was produced comprising a support consisting of two layers, the first is microperforated or perforated polypropylene, the pores having a diameter of 0.9 mm, the other layer being made of 40 g paper and waxed, at a rate of 5 to 8 g per m², this support being associated to a water-repellent material, according to Example 18.

La matière hydrorétentrice est associée aux deux couches formant le support par collage, de façon discontinue, à savoir par raies, avec de la cire, à raison de 4,5 g par m².The water-retaining material is associated with the two layers forming the support by bonding, discontinuously, namely by lines, with wax, at a rate of 4.5 g per m².

La mise en oeuvre d'un tel matériau a été réalisée pour les mêmes produits cités dans l'exemple 18.The use of such a material was carried out for the same products cited in Example 18.

Exemple 20 : Example 20 :

Un matériau a été réalisé comportant un support constitué de deux couches, l'une étant du polychlorure de vinyle microperforé, l'autre couche étant constituée d'un papier de 40 g paraffiné, à raison de 5 à 8 g par m², ce support étant associé à une matière hydrorétentrice, selon l'exemple 18.A material was produced comprising a support consisting of two layers, one being microperforated polyvinyl chloride, the other layer consisting of 40 g paraffin paper, at a rate of 5 to 8 g per m², this support being associated with a water-retaining material, according to Example 18.

La matière hydrorétentrice est associée aux deux couches par collage pleine feuille avec de la cire, à raison de 4, 5 g par m².The water-repellent material is associated with the two layers by full-sheet bonding with wax, at the rate of 4.5 g per m².

La mise en oeuvre d'un tel matériau a été réalisée pour des fromages à pâte molle et à croûte morgée.The use of such a material has been carried out for soft cheeses with a morée rind.

Claims (25)

1) Matériau destiné à l'emballage d'un produit alimentaire ou autre sensible à l'humidité, caractérisé par le fait qu'il est constitué en combinaison d'au moins une feuille support et d'au moins une matière hydrorétentrice, associée intimement par des moyens d'association à la feuille support et dont la fonction est de régler l'humidité et/ou l'exsudat provenant du produit.1) Material intended for the packaging of a food or other product sensitive to humidity, characterized in that it consists of a combination of at least one support sheet and at least one water-retaining material, intimately associated by means of association with the support sheet and whose function is to regulate the humidity and / or the exudate coming from the product. 2) Matériau selon la revendication 1, caractérisé par le fait que la feuille support comporte une couche unique.2) Material according to claim 1, characterized in that the support sheet comprises a single layer. 3) Matériau selon la revendication 1, caractérisé par le fait que la feuille support comporte plusieurs couches.3) Material according to claim 1, characterized in that the support sheet comprises several layers. 4) Matériau selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que la feuille support est étanche aux gaz et/ou à la vapeur d'eau.4) Material according to any one of claims 1 to 3, characterized in that the support sheet is impermeable to gases and / or water vapor. 5) Matériau selon l'une des revendications 1 à 3, caractérisé par le fait que la feuille support est perméable aux gaz et/ou la vapeur d'eau.5) Material according to one of claims 1 to 3, characterized in that the support sheet is permeable to gases and / or water vapor. 6) Matériau selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que la matière constituant la feuille support est choisie dans le groupe formé par le papier, les pellicules cellulosiques, la cellulose pure régénérée, les polymères notamment le polyéthylène, le polypropylène, le chlorure de polyvinyle, le polyester.6) Material according to any one of claims 1 to 5, characterized in that the material constituting the support sheet is chosen from the group formed by paper, cellulose films, regenerated pure cellulose, polymers, in particular polyethylene, polypropylene, polyvinyl chloride, polyester. 7) Matériau selon la revendication 6, caractérisé par le fait que la matière constituée par la feuille support est constituée d'un polymère comportant des micropores ou micro-perforations ou présentant une perméabilité à la vapeur d'eau.7) Material according to claim 6, characterized in that the material constituted by the support sheet consists of a polymer comprising micropores or micro-perforations or having a permeability to water vapor. 8) Matériau selon l'une quelconque des revendications 1 à 7 caractérisé par le fait qu'il comporte en outre au moins une feuille d'aluminium associée à une feuille support.8) Material according to any one of claims 1 to 7 characterized in that it further comprises at least one aluminum sheet associated with a support sheet. 9) Matériau selon l'une quelconque des revendication 1 à 8, caractérisé par le fait que la feuille support comporte des perforations sans enlèvement de matière.9) Material according to any one of claims 1 to 8, characterized in that the support sheet has perforations without removing material. 10) Matériau selon l'une quelconque des revendications 1 à 9 et 21, caractérisé par le fait que la feuille support comporte des perforations avec enlèvement de matière.10) Material according to any one of claims 1 to 9 and 21, characterized in that the support sheet has perforations with removal of material. 11) Matériau selon l'une quelconque des revendications 1 à 10, caractérisé par le fait que la matière hydrorétentrice est constituée par une résine hydrorétentrice choisie dans le groupe formé par des polyacrylonitriles ou des copolymères à base d'acrylonitrile traités par des solutions aqueuses alcalines d'alcools aliphatiques ou cycloaliphatiques mono ou polyfonction­nels de point de fusion supérieur ou égal à 110° C ; des polymères obtenus par polymérisation d'amidon en dispersion dans l'eau et d'un monomère saturé ayant un point de fusion de plus de 100° C ; des polycarboxyalkyl celluloses, des sels métalliques de copolymères d'amidon hydrolisé ; des copolymères d'acide acrylique et d'α oléfines, ou de styrène ou de styrènes substitués ; des dérivés polysaccharides contenant des groupes carboxyliques.11) Material according to any one of claims 1 to 10, characterized in that the water-retaining material consists of a water-retaining resin selected from the group formed by polyacrylonitriles or acrylonitrile-based copolymers treated with aqueous alkaline solutions mono or polyfunctional aliphatic or cycloaliphatic alcohols with a melting point greater than or equal to 110 ° C; polymers obtained by polymerization of starch in dispersion in water and of a saturated monomer having a melting point of more than 100 ° C; polycarboxyalkyl celluloses, metal salts of hydrolysed starch copolymers; copolymers of acrylic acid and of olefins, or of styrene or of substituted styrenes; polysaccharide derivatives containing carboxylic groups. 12) Matériau selon la revendication 11, caractérisé par le fait que la résine constituant la matière hydrorétentrice a un poids final maximal après absorption d'eau, égal à un grand nombre de fois son poids initial avant absorption d'eau, notamment de l'ordre de 400.12) Material according to claim 11, characterized in that the resin constituting the water-retaining material has a maximum final weight after absorption of water, equal to a large number of times its initial weight before absorption of water, in particular of order of 400. 13) Matériau selon l'une quelconque des revendications 1 à 10, caractérisé par le fait que la matière hydrorétentrice est choisie parmi des produits de réaction de copolymères greffés amidonpolyacrylonitrile et d'un alcool polyfonctionnel, des copolymères ollyloligosaccharides-acryliques salifiés, des polyélectrolytes hydrocolloidaux, des produits à base d'amidons, de caséine ou produits similaires, polyalcools notamment de la glycérine, des dérivés glycoliques.13) Material according to any one of claims 1 to 10, characterized in that the water-retaining material is chosen from reaction products of grafted starch-polyacrylonitrile copolymers and of a polyfunctional alcohol, ollyloligosaccharide-salified acrylic copolymers, hydrocolloidal polyelectrolytes , starch products, casein or similar products, polyalcohols including glycerin, glycol derivatives. 14) Matériau selon l'une quelconque des revendications 1 à 10, caractérisé par le fait que la matière hydrorétentrice est constituée de fibres cellulosiques, notamment du type coton.14) Material according to any one of claims 1 to 10, characterized in that the water-retaining material consists of cellulosic fibers, in particular of the cotton type. 15) Matériau selon l'une quelconque des revendications 1 à 10, caractérisé par le fait que la matière hydrorétentrice est constituée par les sels minéraux, notamment du chlorure de sodium.15) Material according to any one of claims 1 to 10, characterized in that the water-retaining material consists of mineral salts, in particular sodium chloride. 16) Matériau selon l'une quelconque des revendications 1 à 10, caractérisé par le fait que la matière hydrorétentrice est constituée par des composites notamment du papier ou un non tissé.16) Material according to any one of claims 1 to 10, characterized in that the water-retaining material consists of composites including paper or a nonwoven. 17) Matériau selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que la matière hydrorétentrice est incorporée dans la feuille support.17) Material according to any one of claims 1 to 5, characterized in that the water-retaining material is incorporated in the support sheet. 18) Matériau selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que la matière hydrorétentrice est superposée sur la feuille support.18) Material according to any one of claims 1 to 4, characterized in that the water-retaining material is superimposed on the support sheet. 19) Matériau selon l'une quelconque des revendications 11, 13, 14, 15, 16 caractérisé par le fait que les moyens d'association de la matière hydrorétentrice à la feuille support, ont un pouvoir collant et sont compris dans la matière hydrorétentrice.19) Material according to any one of claims 11, 13, 14, 15, 16 characterized in that the means of association of the water-repellent material with the support sheet, have a tackiness and are included in the water-retentive material. 20) Matériau selon l'une quelconque des revendications 1, 11, 13, 14, 15, 16, caractérisé par le fait que les moyens d'association de la matière hydrorétentrice à la feuille support ont un pouvoir collant et sont constitués par un adjuvant.20) Material according to any one of claims 1, 11, 13, 14, 15, 16, characterized in that the means of association of the water-retentive material with the support sheet have a tackiness and are constituted by an adjuvant . 21) Matériau selon l'une quelconque des revendications 1 à 20, caractérisé par le fait qu'il se présente sous la forme d'une couche unique.21) Material according to any one of claims 1 to 20, characterized in that it is in the form of a single layer. 22) Matériau selon l'une quelconque des revendications 1 à 21, caractérisé par le fait qu'il comporte plusieurs couches.22) Material according to any one of claims 1 to 21, characterized in that it comprises several layers. 23) Emballage, caractérisé par le fait qu'il comporte au moins une couche de matériau selon l'une quelconque des revendications 1 à 22, comportant au moins un pliage et/ou courbure, et notamment soudée et/ou collée sur elle-même.23) Packaging, characterized in that it comprises at least one layer of material according to any one of claims 1 to 22, comprising at least one folding and / or curvature, and in particular welded and / or glued on itself . 24) Emballage caractérisé par le fait qu'il est constitué d'un premier matériau synthétique thermoformé et operculé au moyen d'un second matériau l'un des deux ou les deux étant selon l'une quelconque des revendications 1 à 22.24) Packaging characterized in that it consists of a first thermoformed synthetic material and sealed with a second material, one of the two or both being according to any one of claims 1 to 22. 25) Procédé de fabrication du matériau d'emballage selon l'une quelconque des revendications 1 à 22, caractérisé par le fait qu'on associe à cette feuille support notamment par pulvérisation ou enduction une matière hydrorétentrice notamment mélangée avec un vernis ou une encre sur une feuille support.25) A method of manufacturing the packaging material according to any one of claims 1 to 22, characterized in that this support sheet is associated in particular by spraying or coating a water-retaining material in particular mixed with a varnish or an ink on a support sheet.
EP86402660A 1985-12-03 1986-12-01 Packaging material for moisture-sensitive products and bags made therefrom. Expired - Lifetime EP0229550B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8517879A FR2590874B1 (en) 1985-12-03 1985-12-03 NEW PACKAGING FOR MOISTURE SENSITIVE PRODUCTS
FR8517879 1985-12-03

Publications (2)

Publication Number Publication Date
EP0229550A1 true EP0229550A1 (en) 1987-07-22
EP0229550B1 EP0229550B1 (en) 1990-06-27

Family

ID=9325390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402660A Expired - Lifetime EP0229550B1 (en) 1985-12-03 1986-12-01 Packaging material for moisture-sensitive products and bags made therefrom.

Country Status (6)

Country Link
US (1) US4977031A (en)
EP (1) EP0229550B1 (en)
DE (1) DE3672231D1 (en)
ES (1) ES2016272B3 (en)
FR (1) FR2590874B1 (en)
PT (1) PT83865B (en)

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EP0317041A1 (en) * 1987-11-18 1989-05-24 Showa Denko Kabushiki Kaisha Water absorption controlled dehydrating device
EP0320314A2 (en) * 1987-12-10 1989-06-14 Japan Exlan Company, Ltd. Water-absorptive sheet for food package
EP0431504A2 (en) * 1989-12-05 1991-06-12 MEIER + NIEHAUS Flexible Folien und Verpackungen GmbH Dryer sheet for transport container
AU622456B2 (en) * 1988-06-28 1992-04-09 Kimberly-Clark Corporation Humidistat
EP0667306A1 (en) * 1994-02-14 1995-08-16 C.M.B. Flexible Flexible packaging film for moisture-sensitive products, in particular for cheese
EP0829344A1 (en) * 1996-08-13 1998-03-18 Alusuisse Technology & Management AG Packaging material
EP3296103A1 (en) 2016-09-19 2018-03-21 Amcor Flexibles France SAS Packaging laminate

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US20020092269A1 (en) * 2001-01-16 2002-07-18 Weder Donald E. Wrapper for a floral grouping formed of a sheet of material having a contoured configuration
CA2141864A1 (en) * 1992-08-06 1994-02-17 Brian David Patterson A package allowing cooling and preservation of horticultural produce without condensation or desiccation
DE4336629A1 (en) * 1993-10-27 1995-05-04 Coronet Werke Gmbh Packaging film
US6352152B1 (en) * 1998-12-18 2002-03-05 Smithkline Beecham Corporation Method and package for storing a pressurized container containing a drug
WO2001094105A1 (en) 2000-06-08 2001-12-13 Pechiney Emballage Flexible Europe Laminated thermoformable film structures useful for packaging food products
GB2385579A (en) * 2002-02-21 2003-08-27 John Firth Liquid containment material
ATE334899T1 (en) * 2002-11-08 2006-08-15 Heinz-Dieter Schmidt PACKAGING FOR ASPARAGUS
CA2549227A1 (en) * 2003-12-03 2005-06-16 Commonwealth Scientific And Industrial Research Organisation Processes for the production of packaging material for transporting and storing perishable goods
EP1842794B1 (en) * 2006-04-03 2009-06-17 Cryovac, Inc. Cheese packaging
JP2009533563A (en) * 2006-04-13 2009-09-17 ディーエスエム アイピー アセッツ ビー．ブイ． Paper substrate containing vapor-deposited triazine, and method for producing a laminate containing said substrate
KR100815059B1 (en) * 2006-08-11 2008-03-18 주식회사 엘지화학 Waterproof sheet
GB0817165D0 (en) 2008-09-19 2008-10-29 Nature Delivered Ltd Food delivery packaging and process
DE202012100002U1 (en) * 2012-01-02 2013-04-05 Mcairlaid's Vliesstoffe Gmbh & Co. Kg Moisture control element for use in packaging
WO2013102785A1 (en) * 2012-01-06 2013-07-11 Amcor Flexibles France Packaging sheet, packaging and associated manufacturing method
ES2587558T3 (en) * 2013-07-03 2016-10-25 Amcor Flexibles France Packaging sheet, packaging and use of said packaging sheet
EP2963177A1 (en) * 2014-07-04 2016-01-06 Danapak Flexibles A/S A packaging sheet for packaging cheese, and associated packaging and manufacturing methods
SE539751C2 (en) 2015-11-09 2017-11-14 Stora Enso Oyj Active moisture control material for packaging and a method for production thereof
TWI768437B (en) * 2020-08-20 2022-06-21 南亞塑膠工業股份有限公司 Plastic food wrap and manufacturing method thereof

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GB696373A (en) * 1950-09-04 1953-08-26 American Viscose Corp Improvements in or relating to the wrapping of meat
FR1433389A (en) * 1965-01-11 1966-04-01 Improvement in food packaging
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Cited By (12)

* Cited by examiner, † Cited by third party
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EP0317041A1 (en) * 1987-11-18 1989-05-24 Showa Denko Kabushiki Kaisha Water absorption controlled dehydrating device
EP0320314A2 (en) * 1987-12-10 1989-06-14 Japan Exlan Company, Ltd. Water-absorptive sheet for food package
EP0320314A3 (en) * 1987-12-10 1990-11-22 Japan Exlan Company, Ltd. Water-absorptive sheet for food package
AU622456B2 (en) * 1988-06-28 1992-04-09 Kimberly-Clark Corporation Humidistat
EP0431504A2 (en) * 1989-12-05 1991-06-12 MEIER + NIEHAUS Flexible Folien und Verpackungen GmbH Dryer sheet for transport container
EP0431504A3 (en) * 1989-12-05 1991-09-18 Meier + Niehaus Gmbh Dryer sheet for transport container
EP0667306A1 (en) * 1994-02-14 1995-08-16 C.M.B. Flexible Flexible packaging film for moisture-sensitive products, in particular for cheese
FR2716174A1 (en) * 1994-02-14 1995-08-18 Cmb Flexible Flexible packaging foil for moisture sensitive products, especially for cheese products.
EP0829344A1 (en) * 1996-08-13 1998-03-18 Alusuisse Technology & Management AG Packaging material
CH690760A5 (en) * 1996-08-13 2001-01-15 Alusuisse Tech & Man Ag Packaging material for wrapping moisture-sensitive products such as soft cheese.
EP3296103A1 (en) 2016-09-19 2018-03-21 Amcor Flexibles France SAS Packaging laminate
WO2018050295A1 (en) 2016-09-19 2018-03-22 Amcor Flexibles France Sas Packaging laminate

Also Published As

Publication number Publication date
ES2016272B3 (en) 1990-11-01
PT83865A (en) 1987-01-01
FR2590874B1 (en) 1988-05-27
EP0229550B1 (en) 1990-06-27
PT83865B (en) 1993-01-29
US4977031A (en) 1990-12-11
DE3672231D1 (en) 1990-08-02
FR2590874A1 (en) 1987-06-05

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