EP4330034A1 - Cork-based cellular structure, method for manufacturing panels incorporating said structure, and uses thereof - Google Patents

Cork-based cellular structure, method for manufacturing panels incorporating said structure, and uses thereof

Info

Publication number
EP4330034A1
EP4330034A1 EP22735523.7A EP22735523A EP4330034A1 EP 4330034 A1 EP4330034 A1 EP 4330034A1 EP 22735523 A EP22735523 A EP 22735523A EP 4330034 A1 EP4330034 A1 EP 4330034A1
Authority
EP
European Patent Office
Prior art keywords
honeycomb structure
strips
zones
sheets
cork
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.)
Pending
Application number
EP22735523.7A
Other languages
German (de)
French (fr)
Inventor
Bruno ABADIE
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4330034A1 publication Critical patent/EP4330034A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/042—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/043—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0444—Details of devices to control the actuation of the electromagnets
    • F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0444—Details of devices to control the actuation of the electromagnets
    • F16C32/0457—Details of the power supply to the electromagnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/06—Vegetal particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/06—Vegetal particles
    • B32B2264/062—Cellulose particles, e.g. cotton
    • B32B2264/065—Lignocellulosic particles, e.g. jute, sisal, hemp, flax, bamboo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/06—Vegetal particles
    • B32B2264/062—Cellulose particles, e.g. cotton
    • B32B2264/067—Wood particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2410/00—Agriculture-related articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B32B2419/04—Tiles for floors or walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels

Definitions

  • the present invention relates to the field of alveolar structures of the honeycomb type, panels comprising such alveolar structures and the process for manufacturing these panels, as well as various uses of said alveolar structures.
  • the invention relates to a stretchable and retractable honeycomb-type honeycomb structure, formed of longitudinal strips having two opposite faces, said strips being arranged side by side facing each other, each strip being assembled on the face opposite the adjacent strip by an alignment of connection zones, the alignment of the connection zones of one of the faces of a strip being axially offset from the alignment of the connection zones of the opposite face.
  • Honeycomb structures of this type have been known for a long time; they are for example made of paper and can be assembled and placed between two sheets of paper or cardboard to form insulation elements, packaging, etc... Their main advantage is their lightness, but they have low impact resistance , as well as a low resistance to compression, which excludes them from use in the production of furniture, for example.
  • a first object of the present invention is to overcome the drawbacks of the structures of the prior art by proposing a honeycomb structure in an inexpensive material that can be used in various environments, such as humid environments, without being degraded .
  • Another object of the invention is to provide a honeycomb structure in a recyclable material, preferably in a biosourced material, or from recycled material.
  • Another object of the invention is to provide a honeycomb structure that is both light and mechanically resistant, in particular resistant to compression, to shocks, etc.
  • Another object of the invention is also to provide a honeycomb structure that can be produced by means of a continuous process, making it possible to manufacture large structures.
  • the present invention relates to a honeycomb structure, in particular formed of cells of the honeycomb type, stretchable, formed of longitudinal strips having two opposite faces, said strips being arranged side by side facing each other, each strip being assembled to the face facing the adjacent strip by an alignment of connection zones, the alignment of the connection zones of one of the faces of a strip being offset axially from the alignment of the connection zones of the opposite face, and is characterized in that the strips are made of material based on agglomerated cork with a binder and in that the connection zones comprise stitches and/or adhesion zones by gluing.
  • honeycomb type cells with a section of substantially polyhedral general shape, in particular hexagonal, or of substantially oval shape.
  • Cork is a natural material. Two types of cork-based materials can be used: on the one hand male or expanded cork, black in color, from the first stripping (first harvest) and prepared by overheating with steam by welding into a compact block due to the presence within it of suberin, and on the other hand the female cork of blond color, resulting from the second stripping (second harvest) and prepared by crushing the bark which is agglomerated with a binder. Cork is of low density and is by nature a very good thermal, acoustic and vibration insulator. In addition, it is resistant to fire and water, thanks to the suberin that permeates its cells. Cork also has the advantage of being a recyclable material.
  • honeycomb structure according to the invention made of cork-based material, has, among other things, good thermal, acoustic and vibration insulation performance, performance which is amplified by the presence of nest-shaped cells of bee.
  • the cork-based materials used as insulators could certainly include cells, but these were made by machining (such as hollowing, drilling, tapping), with many scraps and loss. of matter.
  • this cork is in the form of grains or powder, agglomerated with a binder;
  • the binder of the agglomerated cork may be a synthetic polymer, such as polyurethane (PU), or advantageously a biobased polymer, such as polylactic acid (PLA), suberin or another natural resin.
  • PU polyurethane
  • PLA polylactic acid
  • the structure according to the invention is light (the strips can be a few millimeters thick), despite a density of the agglomerated cork which can reach 350 kg/m3.
  • the cork grains or powder can come from recycled cork, for example from reground cork stoppers.
  • connection zones comprising either stitches, or connection zones by gluing, or a combination of these two modes of connection, that is to say either an alternation of sewn and glued connection zones for the assembly of two strips forming a pair or an alternation of these two modes of connection from one pair of strips to another.
  • the adhesion zones comprise heat-bonded zones, preferably these adhesion zones comprise heat-bonded tapes.
  • the material forming said strips may be a mixture of cork and an elastomeric material, such as rubber, in the form of powder and/or of agglomerated granules. Nevertheless, in such a composite material, the cork is then advantageously the majority constituent and can represent at least 50% by weight of the material constituting the strips of the alveolar structure.
  • the structure according to the present invention deployable and retractable like an accordion, allows storage can be cumbersome, and can then be easily cut, on demand, depending on the subsequent uses envisaged.
  • the present invention also relates to a panel comprising a honeycomb structure as described above forming, in the stretched state by deployment of the cells, the core of said panel and being disposed between two plates or sheets.
  • said panel may be generally planar, corrugated or curved. If the alveolar structure is sandwiched for example between two flexible sheets, the final shape of the element produced can be cylindrical in a variant.
  • the plates or sheets can be made of a material other than cork, such as wood, or of a material chosen from among other natural materials complexed, laminated or laminated with cork such as flax, hemp, reed, cellulose fibers , wool, wood, banana, coconut or with an elastomeric material such as rubber.
  • said plates or sheets are also made of material based on agglomerated cork with a binder.
  • said panel according to the invention can be entirely made of cork-based material, or even entirely made of cork, with the advantages mentioned above with regard to this material: resistance to water, to fire, to shocks, to compression, thermal, acoustic and vibration insulation, its biosourced origin, its recyclable nature, and its lightness.
  • the deployed cells of the cellular structure in the stretched state can be at least partially filled with a second thermal and/or acoustic and/or vibratile insulating material.
  • This second material can be, in particular, chosen from natural materials such as wood fibers, hemp, flax, or cork granules without binder.
  • the plates or sheets between which the alveolar structure is sandwiched can, depending on the desired end use, and in a non-limiting way, be covered with a fabric based on natural fibers or not, such as fibers of linen, carbon, Kevlar ®, to increase the mechanical resistance of said panel, for example to shocks or tears or its UV resistance, or its water-repellent performance, or a layer of another material, among which mention may be made of non-limiting manner: wood, a polymer, plaster, cement.
  • Said panel can also be part of a composite element in order to further increase its resistance to compression or be part of an assembly of several panels. It can be painted or screen printed.
  • the present invention also relates to a method of manufacturing a panel as described above incorporating the honeycomb structure according to the invention.
  • the panel manufacturing process comprises the following successive steps:
  • -supply in the form of a first roll and a second roll, of plates/sheets based on agglomerated cork, said first and second rolls having axes parallel to each other,
  • connection of two adjacent strips to each other can be carried out alternately by sewing or by heat-sealing, preferably by means of heat-sealing tapes: thus the production of the honeycomb structure does not require passage through a drying. Only hot compression (for example from 80° C. or at a temperature above 100° C., depending on the nature of the heat-sealing tape) of the superimposed strips is sufficient to allow heat-sealing.
  • the process for manufacturing the panel according to the invention comprises the following successive steps:
  • This second embodiment refers to an assembly of the bands only by sewing. Such an assembly gives the structure, compared to an assembly of the strips by gluing providing a certain local rigidity, greater flexibility, facilitating the deployment of the cells.
  • a wide variety of stitches is possible: the choice can be made according in particular to the thickness of the cork-based strips, the desired spacing of the cells, or even according to the stretching of the strips during their deployment.
  • the nature of the thread used for joining the strips by sewing is not limited, and depends in particular on the field of application for which the structure is made.
  • the yarn used for joining the strips by sewing can be a cork-based yarn, such as for example the yarn described in patent EP3409830B1.
  • the transverse cutting of the cork-based plates or sheets can be carried out either perpendicular to the direction of unrolling, or at an angle less than 90° depending on the final shape required for the honeycomb structure.
  • This cut can also be different depending on the "blocks" of assembled strips, in particular to give a specific shape to the honeycomb structure (for example to create undulations or a general beveled shape of the honeycomb structure, depending on the end use considered).
  • the method according to the invention may include steps for finishing the panel, such as finishing the edges of said panel to adapt it to the intended field of application: for example to avoid thermal bridges for the production of insulated packaging.
  • the present invention also relates to the use of the honeycomb structure or of the panel described above as thermal and/or acoustic and/or vibratory insulation, protection or packaging element, shock-absorbing element, element resistant to compression, floating element, the cells possibly being empty or at least partially filled.
  • partially filled cells is meant the filling of at least part of the volume of each cell and/or the filling of at least a certain number of cells of the cellular structure.
  • honeycomb structure or of the panel can be, according to a non-exhaustive list, in the fields of building, land vehicles, boating, aeronautics, packaging, horticulture or viticulture, furniture...
  • the honeycomb structure according to the present invention can be used in viticulture, or in horticulture, in particular in the deployed state of the cells with filling of said cells with a growing medium, such as potting soil, thus taking advantage the properties of both thermal insulation (eg against frost) and water resistance of the cork-based material.
  • FIG. 1 is a diagram partially representing a honeycomb structure according to the present invention
  • FIG. 2 is a diagram representing a panel incorporating a honeycomb structure according to the invention.
  • FIG. 3 is a diagram showing a device for manufacturing a honeycomb structure, according to the invention, by sewing,
  • FIG. 4 is a diagram showing a device for manufacturing a honeycomb structure, according to the invention, by means of heat-sealing tapes,
  • FIG.5 is a perspective side view of the device shown schematically in FIG.
  • FIG. 6 is another perspective side view of the device of Figure 5
  • FIG. 7 is a diagram showing a device for manufacturing a honeycomb structure according to the invention by alternating connection by sewing and by means of heat-sealing tapes.
  • Figure 1 shows a partial example of a honeycomb structure 1 in which an alternation of strips hereinafter referred to as odd 3 and even strips 4 are assembled by alignments of connecting zones 5, the alignment connecting zones of an odd strip with the adjacent even strip being axially offset from the alignment of the connecting zones of the pairs of adjacent strips.
  • the connection zones can be stitches 8 or heat-sealed tapes 6.
  • the constituent material of the bands is based on cork agglomerated with a binder such as polyurethane or suberin.
  • the thickness of said strips can be between 0.5 mm and several mm, preferably between 1 mm and 3 mm.
  • the honeycomb structure in the deployed state constitutes the core of a panel 11 disposed between two sheets or plates 12.
  • These sheets or plates 12 can also be based on cork or another material to impart various properties to said panel (stiffening, insulation, complementary, facing, etc.).
  • the cork or cork-based sheets which will form the strips of the honeycomb structure 1 are brought by means of a roller 13.
  • a roller loader 14 can be provided nearby.
  • the manufacturing device comprises a first telescopic and mobile sewing tool 15, at least one second sewing tool 16, a strip cutting tool 17 which can be a cutter, a rotary cutter or variant a laser cutting device, a second sewing tool 17 cut strips and then a comb type device 18 fixed on a rotary axis for the assembly of the honeycomb structure and its deployment.
  • the honeycomb structure 1 then passes through a drive wheel 19 towards the sandwiching part of the honeycomb structure between two sheets or plates fed by rollers 20 and 21 to form a panel according to the present invention.
  • the device for sandwiching 22 comprises rollers for bonding and compressing the plates or sheets 20 and 21 against said honeycomb structure 1.
  • Figure 4 schematizes the device for assembling the strips of the honeycomb structure by means of heat-sealing tapes 23 fed by rollers 24. The assembly of part of the heat-sealing tapes is carried out at station 25 then at the second station 26. A cutting device 17 of the cutter or rotary cutter type is also provided for cutting the material into strips. In the running direction of the strips, a hot compression device 27 is provided for the final assembly of the strips.
  • honeycomb structure is then driven by the drive wheel 19 towards the sandwiching part of the structure between two sheets 20 and 21 as shown for the sewing for the device of Figure 3.
  • FIGS 5 and 6 use the same references as Figure 4, making the various elements of this manufacturing device more visible by means of heat-sealing tapes.
  • Figure 7 groups together positions for both assembly by sewing and assembly by heat-sealing tapes 23.
  • the reference numbers applying to this Figure 7 are identical to those of Figures 3 and 4.
  • the roller 13 for supplying cork or cork-based sheets unrolls the latter in the direction of travel F in the manufacturing device; this embodiment limits the width of the panels to the dimension of the width of the cork sheets currently marketed.
  • the roller 13 can be arranged along an axis perpendicular to the manufacturing device, that is to say allowing the sequential unwinding of cork or cork-based sheets transversely to the direction of travel F in the manufacturing device; the length of each of these sheets, which then corresponds to the width of the panel to be produced, thus allows the production of very wide panels if necessary.
  • the method according to the present invention is rapid and does not require passage through an oven. Only the compression step is carried out hot in the embodiment by means of heat-sealed tapes.
  • the method according to the invention is thus also less energy-intensive.

Abstract

The invention relates to a cellular structure (1), in particular formed of honeycomb-type cells (2), which structure can be stretched and is formed by longitudinal strips having two opposite faces, said strips (3, 4) being arranged side by side and facing one another, each strip being joined to the opposite face of the adjacent strip by an alignment of connection zones (5), the alignment of the connection zones of one of the faces of one strip being axially offset from the alignment of the connection zones of the opposite face, characterised in that the strips are made of a cork-based material agglomerated with a binder and in that the connection zones (5) comprise stitches and/or zones for adhesion by gluing. The invention also relates to panels comprising such cellular structures and the method for manufacturing such panels, as well as to various uses of said cellular structures.

Description

Description Description
Titre de l'invention : Structure alvéolaire à base de liège, procédé de fabrication de panneaux incorporant ladite structure, et leurs utilisations Title of the invention: Alveolar structure based on cork, process for manufacturing panels incorporating said structure, and their uses
[0001] DOMAINE DE L’INVENTION [0001] FIELD OF THE INVENTION
[0002] La présente invention concerne le domaine des structures alvéolaires de type nid d’abeille, des panneaux comprenant de telles structures alvéolaires et le procédé de fabrication de ces panneaux, ainsi que diverses utilisations desdites structures alvéolaires. The present invention relates to the field of alveolar structures of the honeycomb type, panels comprising such alveolar structures and the process for manufacturing these panels, as well as various uses of said alveolar structures.
[0003] Plus particulièrement l'invention concerne une structure alvéolaire de type nid d'abeille étirable et rétractable, formée de bandes longitudinales présentant deux faces opposées, lesdites bandes étant disposées côte à côte en se faisant face, chaque bande étant assemblée à la face en regard de la bande adjacente par un alignement de zones de liaison, l’alignement des zones de liaison de l’une des faces d’une bande étant décalé axialement de l’alignement des zones de liaison de la face opposée. More particularly, the invention relates to a stretchable and retractable honeycomb-type honeycomb structure, formed of longitudinal strips having two opposite faces, said strips being arranged side by side facing each other, each strip being assembled on the face opposite the adjacent strip by an alignment of connection zones, the alignment of the connection zones of one of the faces of a strip being axially offset from the alignment of the connection zones of the opposite face.
[0004] ART ANTERIEUR [0004] PRIOR ART
[0005] Des structures de ce type en nid d’abeille sont connues depuis longtemps ; elles sont par exemple fabriquées en papier et peuvent être assemblées et placées entre deux feuilles de papier ou carton pour constituer des éléments d’isolation, des emballages, etc... Leur principal avantage est leur légèreté, mais ils présentent une faible résistance aux chocs, ainsi qu’une faible résistance à la compression, ce qui les écarte d’une utilisation dans la réalisation de meubles, par exemple. [0005] Honeycomb structures of this type have been known for a long time; they are for example made of paper and can be assembled and placed between two sheets of paper or cardboard to form insulation elements, packaging, etc... Their main advantage is their lightness, but they have low impact resistance , as well as a low resistance to compression, which excludes them from use in the production of furniture, for example.
[0006] Cependant de tels matériaux ne peuvent être utilisés dans n’importe quel environnement. Le papier et le carton sont en particulier sensibles à la forte chaleur (proximité de sources chaudes), ainsi qu’à l’humidité et ne peuvent donc pas être mis en œuvre dans des atmosphères très humides, ni en contact avec l’eau ou autres liquides, à moins d’être préalablement soumis à un traitement ou recouverts de résine ou film polymère pour assurer leur protection ou étanchéité. De même, dans le domaine de l’isolation thermique ou phonique, pour augmenter leurs performances, les structures en nid d’abeille en papier/carton doivent être recouvertes d’un parement ou revêtement complémentaire : film métallisé, panneaux de particules, plancher, ou encore être complétées par un remplissage des alvéoles par des granulés ou éléments fibreux etc... [0007] Les structures alvéolaires en nid d’abeille en matériau polymère, telles que les structures alvéolaires ultra légères utilisées par exemple en génie civil pour l’infiltration ou la rétention d’eaux pluviales, présentent l’inconvénient majeur être réalisés en matière non-biosourcée, peu recyclable. [0006] However, such materials cannot be used in just any environment. Paper and cardboard are particularly sensitive to high heat (proximity to hot springs), as well as to humidity and therefore cannot be used in very humid atmospheres, nor in contact with water or other liquids, unless previously subjected to treatment or covered with resin or polymer film to ensure their protection or sealing. Similarly, in the field of thermal or sound insulation, for increase their performance, the paper/cardboard honeycomb structures must be covered with a facing or additional coating: metallized film, particle board, floor, or even be completed by filling the cells with granules or fibrous elements etc. [0007] Honeycomb cellular structures made of polymer material, such as ultra-light cellular structures used for example in civil engineering for the infiltration or retention of rainwater, have the major drawback of being made of non-biosourced, low-recyclability material.
[0008] Des matériaux à base d’aluminium, ou encore de fibres de carbone et/ou de verre ont été décrits dans la demande de brevet GB2058661 pour réaliser des structures en nid d’abeille dans le domaine de l’industrie aérospatiale, pour des applications nécessitant des propriétés à la fois de résistance mécanique et de légèreté. Ce matériau est toutefois coûteux et ne peut être adapté à des éléments d’isolation dans le bâtiment par exemple. [0009] Par ailleurs la tendance actuelle est de rechercher de plus en plus des matériaux naturels pour des usages d’isolation thermique, acoustique ou vibratoire. [0008] Materials based on aluminium, or carbon and/or glass fibers have been described in patent application GB2058661 for producing honeycomb structures in the field of the aerospace industry, for applications requiring properties of both mechanical resistance and lightness. However, this material is expensive and cannot be adapted to insulation elements in buildings, for example. [0009] Moreover, the current trend is to seek more and more natural materials for thermal, acoustic or vibration insulation uses.
[0010] BUTS DE L’INVENTION [0010] AIMS OF THE INVENTION
[0011] Un premier but de la présente invention est de pallier les inconvénients des structures de l’art antérieur en proposant une structure alvéolaire en un matériau peu coûteux et pouvant être utilisé dans des environnements variés, tels que des environnements humides, sans être dégradé. A first object of the present invention is to overcome the drawbacks of the structures of the prior art by proposing a honeycomb structure in an inexpensive material that can be used in various environments, such as humid environments, without being degraded .
[0012] Un autre but de l’invention est de proposer une structure alvéolaire en un matériau recyclable, de préférence en un matériau biosourcé, ou à partir de matériau recyclé. Another object of the invention is to provide a honeycomb structure in a recyclable material, preferably in a biosourced material, or from recycled material.
[0013] Un autre but de l’invention est de proposer une structure alvéolaire à la fois légère et mécaniquement résistante, notamment résistante à la compression, aux chocs.... Another object of the invention is to provide a honeycomb structure that is both light and mechanically resistant, in particular resistant to compression, to shocks, etc.
[0014] Un autre but de l’invention est également de proposer une structure alvéolaire pouvant être réalisée au moyen d’un procédé en continu, permettant de fabriquer des structures de grandes dimensions. [0015] DESCRIPTION DE L’INVENTION Another object of the invention is also to provide a honeycomb structure that can be produced by means of a continuous process, making it possible to manufacture large structures. [0015] DESCRIPTION OF THE INVENTION
[0016] A cet effet la présente invention concerne une structure alvéolaire, notamment formée d’alvéoles de type nid d’abeille, étirable, formée de bandes longitudinales présentant deux faces opposées, lesdites bandes étant disposées côte à côte en se faisant face, chaque bande étant assemblée à la face en regard de la bande adjacente par un alignement de zones de liaison, l’alignement des zones de liaison de l’une des faces d’une bande étant décalé axialement de l’alignement des zones de liaison de la face opposée, et est caractérisée en ce que les bandes sont en matériau à base de liège aggloméré avec un liant et en ce que les zones de liaison comprennent des points de couture et/ou des zones d’adhésion par collage. To this end, the present invention relates to a honeycomb structure, in particular formed of cells of the honeycomb type, stretchable, formed of longitudinal strips having two opposite faces, said strips being arranged side by side facing each other, each strip being assembled to the face facing the adjacent strip by an alignment of connection zones, the alignment of the connection zones of one of the faces of a strip being offset axially from the alignment of the connection zones of the opposite face, and is characterized in that the strips are made of material based on agglomerated cork with a binder and in that the connection zones comprise stitches and/or adhesion zones by gluing.
[0017] Par « type nid d’abeille » on entend ici des alvéoles de section de forme générale sensiblement polyédrique, en particulier hexagonale, ou de forme sensiblement ovale. [0017] By “honeycomb type” is meant here cells with a section of substantially polyhedral general shape, in particular hexagonal, or of substantially oval shape.
[0018] Le liège est un matériau naturel. Deux types de matériaux à base de liège peuvent être utilisés : d’une part le liège mâle ou expansé, de couleur noire, issu du premier démasclage (première récolte) et préparé par surchauffage à la vapeur d'eau en se soudant en bloc compact en raison de la présence en son sein de la subérine, et d'autre part le liège femelle de couleur blonde, issu du second démasclage (seconde récolte) et préparé par concassage de l'écorce qui est agglomérée avec un liant. Le liège est de faible densité et est par nature un très bon isolant thermique, acoustique et vibratoire. De plus il résiste bien au feu et à l’eau, grâce à la subérine qui imprègne ses cellules. Le liège présente en outre l’avantage d’être un matériau recyclable. [0018] Cork is a natural material. Two types of cork-based materials can be used: on the one hand male or expanded cork, black in color, from the first stripping (first harvest) and prepared by overheating with steam by welding into a compact block due to the presence within it of suberin, and on the other hand the female cork of blond color, resulting from the second stripping (second harvest) and prepared by crushing the bark which is agglomerated with a binder. Cork is of low density and is by nature a very good thermal, acoustic and vibration insulator. In addition, it is resistant to fire and water, thanks to the suberin that permeates its cells. Cork also has the advantage of being a recyclable material.
[0019] Ainsi la structure alvéolaire selon l’invention, réalisée en matériau à base de liège, présente, entre autres, de bonnes performances d’isolation thermique, acoustique et vibratoire, performances qui sont amplifiées par la présence des alvéoles en forme de nid d’abeille. Thus the honeycomb structure according to the invention, made of cork-based material, has, among other things, good thermal, acoustic and vibration insulation performance, performance which is amplified by the presence of nest-shaped cells of bee.
[0020] Jusqu’à ce jour les matériaux à base de liège utilisés en tant qu’isolants pouvaient certes comporter des alvéoles, mais celles-ci étaient réalisées par usinage (tel que évidage, perçage, taraudage), avec de nombreuses chutes et perte de matière. [0021] Dans la présente invention ce liège est sous forme de grains ou de poudre, agglomérés avec un liant ; le liant du liège aggloméré peut-être un polymère synthétique, tel que du polyuréthane (PU), ou avantageusement un polymère biosourcé, tel que l’acide polylactique (PLA), la subérine ou autre résine naturelle. Néanmoins la structure selon l’invention est légère (les bandes pouvant être d’épaisseur de quelques millimètres), malgré une masse volumique du liège aggloméré pouvant atteindre 350 kg/m3. Les grains ou poudre de liège peuvent provenir de liège recyclé, par exemple de bouchons de liège rebroyés. [0020] Until now, the cork-based materials used as insulators could certainly include cells, but these were made by machining (such as hollowing, drilling, tapping), with many scraps and loss. of matter. In the present invention this cork is in the form of grains or powder, agglomerated with a binder; the binder of the agglomerated cork may be a synthetic polymer, such as polyurethane (PU), or advantageously a biobased polymer, such as polylactic acid (PLA), suberin or another natural resin. Nevertheless, the structure according to the invention is light (the strips can be a few millimeters thick), despite a density of the agglomerated cork which can reach 350 kg/m3. The cork grains or powder can come from recycled cork, for example from reground cork stoppers.
[0022] Les bandes longitudinales à base de liège sont assemblées entre elles par les zones de liaison comprenant soit des points de couture, soit des zones de liaison par collage, soit une combinaison de ces deux modes de liaison, c’est à dire soit une alternance de zones de liaison cousues et collées pour l’assemblage de deux bandes formant une paire ou une alternance de ces deux modes de liaison d’une paire de bandes à une autre. [0022] The longitudinal strips based on cork are assembled together by the connection zones comprising either stitches, or connection zones by gluing, or a combination of these two modes of connection, that is to say either an alternation of sewn and glued connection zones for the assembly of two strips forming a pair or an alternation of these two modes of connection from one pair of strips to another.
[0023] Selon un mode avantageux de réalisation de la structure alvéolaire selon l’invention, les zones d’adhésion comprennent des zones thermocollées, de préférence ces zones d’adhésion comprennent des rubans thermocollés. According to an advantageous embodiment of the honeycomb structure according to the invention, the adhesion zones comprise heat-bonded zones, preferably these adhesion zones comprise heat-bonded tapes.
[0024] Pour améliorer encore les performances anti-chocs et anti-vibratiles de la structure alvéolaire, le matériau formant lesdites bandes peut être un mélange de liège et d'un matériau élastomère, tel que le caoutchouc, sous forme de poudre et/ou de granules agglomérés. Néanmoins, dans un tel matériau composite, le liège est alors avantageusement le constituant majoritaire et peut représenter au moins 50 % massique du matériau constitutif des bandes de la structure alvéolaire. [0024] To further improve the anti-shock and anti-vibration performance of the honeycomb structure, the material forming said strips may be a mixture of cork and an elastomeric material, such as rubber, in the form of powder and/or of agglomerated granules. Nevertheless, in such a composite material, the cork is then advantageously the majority constituent and can represent at least 50% by weight of the material constituting the strips of the alveolar structure.
[0025] La structure selon la présente invention, déployable et rétractable tel un accordéon, permet un stockage peut encombrant, et peut ensuite être découpée aisément, à la demande, en fonction des usages ultérieurs envisagés. The structure according to the present invention, deployable and retractable like an accordion, allows storage can be cumbersome, and can then be easily cut, on demand, depending on the subsequent uses envisaged.
[0026] La présente invention concerne également un panneau comprenant une structure alvéolaire telle que décrite ci-dessus formant, à l’état étiré par déploiement des alvéoles, l’âme dudit panneau et étant disposée entre deux plaques ou feuilles. [0027] Selon l’utilisation envisagée, ledit panneau peut être de forme générale plane, ondulée ou incurvée. Si la structure alvéolaire est prise en sandwich par exemple entre deux feuilles souples la forme finale de l'élément réalisé peut être en variante cylindrique. The present invention also relates to a panel comprising a honeycomb structure as described above forming, in the stretched state by deployment of the cells, the core of said panel and being disposed between two plates or sheets. [0027] Depending on the intended use, said panel may be generally planar, corrugated or curved. If the alveolar structure is sandwiched for example between two flexible sheets, the final shape of the element produced can be cylindrical in a variant.
[0028] Les plaques ou feuilles peuvent être en matériau différent du liège, tel que le bois, ou en matériau choisi parmi d’autres matériaux naturels complexés, stratifiés ou laminés avec du liège tels que des fibres de lin, chanvre, roseau, cellulose, laine, bois, banane, coco ou encore avec un matériau élastomère tel que le caoutchouc. [0028] The plates or sheets can be made of a material other than cork, such as wood, or of a material chosen from among other natural materials complexed, laminated or laminated with cork such as flax, hemp, reed, cellulose fibers , wool, wood, banana, coconut or with an elastomeric material such as rubber.
[0029] De préférence lesdites plaques ou feuilles sont également en matériau à base de liège aggloméré avec un liant. Ainsi ledit panneau selon l’invention peut être entièrement réalisé en matériau à base de liège, voire intégralement réalisé en liège, avec les avantages précédemment mentionnés en ce qui concerne ce matériau : résistance à l’eau, au feu, aux chocs, à la compression, isolant thermique, acoustique, vibratile, son origine biosourcée, son caractère recyclable, et sa légèreté. [0029] Preferably, said plates or sheets are also made of material based on agglomerated cork with a binder. Thus said panel according to the invention can be entirely made of cork-based material, or even entirely made of cork, with the advantages mentioned above with regard to this material: resistance to water, to fire, to shocks, to compression, thermal, acoustic and vibration insulation, its biosourced origin, its recyclable nature, and its lightness.
[0030] Pour augmenter encore les performances d’isolation dudit panneau, les alvéoles déployées de la structure alvéolaire à l’état étiré peuvent être au moins partiellement remplies d’un second matériau isolant thermique et/ou acoustique et/ou vibratile. Ce second matériau peut être, en particulier, choisi parmi des matériaux naturels tels que fibres de bois, de chanvre, de lin, ou encore granulés de liège sans liant. [0030] To further increase the insulation performance of said panel, the deployed cells of the cellular structure in the stretched state can be at least partially filled with a second thermal and/or acoustic and/or vibratile insulating material. This second material can be, in particular, chosen from natural materials such as wood fibers, hemp, flax, or cork granules without binder.
[0031] Les plaques ou feuilles entre lesquelles la structure alvéolaire est prise en sandwich peuvent, selon l’usage final souhaité, et de manière non limitative, être revêtues d’un tissu à base de fibres naturelles ou non, telles que des fibres de lin, de carbone, de Kevlar ®, pour augmenter la résistance mécanique dudit panneau par exemple aux chocs ou aux déchirures ou sa résistance aux UV, ou ses performances hydrofuge, ou d’une couche d’un autre matériau parmi lesquels on peut citer de manière non limitative : le bois, un polymère, du plâtre, du ciment. [0031] The plates or sheets between which the alveolar structure is sandwiched can, depending on the desired end use, and in a non-limiting way, be covered with a fabric based on natural fibers or not, such as fibers of linen, carbon, Kevlar ®, to increase the mechanical resistance of said panel, for example to shocks or tears or its UV resistance, or its water-repellent performance, or a layer of another material, among which mention may be made of non-limiting manner: wood, a polymer, plaster, cement.
[0032] Ledit panneau peut aussi faire partie d’un élément composite afin d’augmenter encore sa résistance à la compression ou faire partie d’un assemblage de plusieurs panneaux. Il peut être peint ou sérigraphié. [0033] La présente invention concerne également un procédé de fabrication d’un panneau tel que décrit précédemment incorporant la structure alvéolaire selon l’invention. Said panel can also be part of a composite element in order to further increase its resistance to compression or be part of an assembly of several panels. It can be painted or screen printed. The present invention also relates to a method of manufacturing a panel as described above incorporating the honeycomb structure according to the invention.
[0034] Selon un premier mode de réalisation le procédé de fabrication du panneau comprend les étapes successives suivantes : According to a first embodiment, the panel manufacturing process comprises the following successive steps:
-fourniture, sous forme d’un premier rouleau et d’un second rouleau, de plaques/feuilles à base de liège aggloméré, lesdits premier et second rouleaux ayant des axes parallèles entre eux, -supply, in the form of a first roll and a second roll, of plates/sheets based on agglomerated cork, said first and second rolls having axes parallel to each other,
-déroulage des plaques/feuilles et réalisation d’une première série de zones de liaisons parallèles aux bords longitudinaux des plaques/feuilles par couture et/ou thermocollage, - unrolling of the plates/sheets and production of a first series of connection zones parallel to the longitudinal edges of the plates/sheets by sewing and/or heat-sealing,
-découpe des plaques/feuilles en bandes transversalement au sens de déroulage des plaques/feuilles, - cutting of the plates/sheets into strips transversely to the direction of unwinding of the plates/sheets,
-superposition alternée des bandes découpées et réalisation d’une deuxième série de zones de liaison des bandes par couture et/ou thermocollage, les zones de liaison de la deuxième série étant décalées axialement par rapport aux premières zones de liaison, -alternate superposition of the cut-out strips and production of a second series of bonding zones of the strips by sewing and/or heat-sealing, the bonding zones of the second series being offset axially with respect to the first bonding zones,
- éventuellement compression des bandes superposées, en cas de thermocollage desdites bandes, - possibly compression of the superimposed strips, in the event of heat sealing of said strips,
- dépliage des bandes superposées pour obtenir ladite structure alvéolaire,- unfolding of the superimposed strips to obtain said honeycomb structure,
- insertion et fixation, de préférence par collage, de ladite structure alvéolaire entre deux plaques ou feuilles pour former ledit panneau. - insertion and fixing, preferably by gluing, of said honeycomb structure between two plates or sheets to form said panel.
[0035] Dans ce premier mode de réalisation la liaison de deux bandes adjacentes entre elles peut être effectuée alternativement par couture ou par thermocollage de préférence au moyen de rubans thermocollants : ainsi la réalisation de la structure alvéolaire ne nécessite pas le passage dans un four de séchage. Seule une compression à chaud (par exemple à partir de 80°C ou à une température supérieure à 100°C, selon la nature du ruban thermocollant) des bandes superposées est suffisante pour permettre le thermocollage. In this first embodiment, the connection of two adjacent strips to each other can be carried out alternately by sewing or by heat-sealing, preferably by means of heat-sealing tapes: thus the production of the honeycomb structure does not require passage through a drying. Only hot compression (for example from 80° C. or at a temperature above 100° C., depending on the nature of the heat-sealing tape) of the superimposed strips is sufficient to allow heat-sealing.
[0036] Selon un second mode de réalisation le procédé de fabrication du panneau selon l’invention comprend les étapes successives suivantes : According to a second embodiment, the process for manufacturing the panel according to the invention comprises the following successive steps:
-fourniture, sous forme d’un rouleau, d’une plaque/feuille à base de liège aggloméré, -déroulage de ladite plaque/feuille et découpe transversale de ladite plaque/feuille en bandes longitudinales - supply, in the form of a roll, of a plate/sheet based on agglomerated cork, - unrolling of said plate/sheet and transverse cutting of said plate/sheet into longitudinal strips
- création de zones de liaisons transversales par couture pour former des bandes longitudinales cousues disposées de telle manière que l’alignement des zones de liaison de l’une des faces d’une bande est décalé axialement de l’alignement des zones de liaison de la face opposée d’une bande adjacente - creation of transverse connection zones by sewing to form sewn longitudinal strips arranged in such a way that the alignment of the connection zones of one of the faces of a strip is axially offset from the alignment of the connection zones of the opposite side of an adjacent band
- dépliage des bandes superposées pour obtenir la structure alvéolaire -insertion et fixation, de préférence par collage, de ladite structure alvéolaire entre deux plaques ou feuilles pour former ledit panneau. - unfolding of the superimposed strips to obtain the honeycomb structure -insertion and fixing, preferably by gluing, of said honeycomb structure between two plates or sheets to form said panel.
[0037] Ce second mode de réalisation se réfère à un assemblage des bandes uniquement par couture. Un tel assemblage confère à la structure, par rapport à un assemblage des bandes par collage apportant une certaine rigidité locale, une plus grande souplesse, facilitant le déploiement des alvéoles. De plus une grande variété de points de couture est possible : le choix pouvant se faire selon notamment l’épaisseur des bandes à base de liège, l’espacement souhaité des alvéoles, ou encore selon l’étirement des bandes lors de leur déploiement. This second embodiment refers to an assembly of the bands only by sewing. Such an assembly gives the structure, compared to an assembly of the strips by gluing providing a certain local rigidity, greater flexibility, facilitating the deployment of the cells. In addition, a wide variety of stitches is possible: the choice can be made according in particular to the thickness of the cork-based strips, the desired spacing of the cells, or even according to the stretching of the strips during their deployment.
[0038] La nature du fil utilisé pour la liaison des bandes par couture n’est pas limitée, et dépend en particulier du domaine d’application pour lequel la structure est réalisée. Le fil utilisé pour la liaison des bandes par couture peut être un fil à base de liège, tel que par exemple le fil décrit dans le brevet EP3409830B1. The nature of the thread used for joining the strips by sewing is not limited, and depends in particular on the field of application for which the structure is made. The yarn used for joining the strips by sewing can be a cork-based yarn, such as for example the yarn described in patent EP3409830B1.
[0039] La découpe transversale des plaques ou feuilles à base de liège peut être réalisée soit perpendiculairement au sens de déroulage, soit selon un angle inférieur à 90° suivant la forme finale requise pour la structure alvéolaire. Cette découpe peut aussi être différente selon les « blocs » de bandes assemblées, notamment pour donner une forme spécifique à la structure alvéolaire (par exemple pour créer des ondulations ou une forme générale en biseau de la structure alvéolaire, en fonction de l’usage final envisagé). The transverse cutting of the cork-based plates or sheets can be carried out either perpendicular to the direction of unrolling, or at an angle less than 90° depending on the final shape required for the honeycomb structure. This cut can also be different depending on the "blocks" of assembled strips, in particular to give a specific shape to the honeycomb structure (for example to create undulations or a general beveled shape of the honeycomb structure, depending on the end use considered).
[0040] Le procédé selon l’invention peut comprendre des étapes de finition du panneau, tel qu’une finition des chants dudit panneau pour l’adapter au domaine d’application envisagé : par exemple pour éviter des ponts thermiques pour la réalisation d’un emballage isotherme. [0041] La présente invention concerne également l’utilisation de la structure alvéolaire ou du panneau décrits ci-dessus en tant qu’isolant thermique et/ou acoustique et/ou vibratile, élément de protection ou d’emballage, élément amortisseur de chocs, élément résistant à la compression, élément flottant, les alvéoles pouvant être vides ou au moins partiellement remplies. The method according to the invention may include steps for finishing the panel, such as finishing the edges of said panel to adapt it to the intended field of application: for example to avoid thermal bridges for the production of insulated packaging. The present invention also relates to the use of the honeycomb structure or of the panel described above as thermal and/or acoustic and/or vibratory insulation, protection or packaging element, shock-absorbing element, element resistant to compression, floating element, the cells possibly being empty or at least partially filled.
[0042] Par alvéoles partiellement remplies on entend le remplissage d’au moins une partie du volume de chaque alvéole et/ou le remplissage d’au moins un certain nombre d’alvéoles de la structure alvéolaire. [0042] By partially filled cells is meant the filling of at least part of the volume of each cell and/or the filling of at least a certain number of cells of the cellular structure.
[0043] Ces utilisations de la structure alvéolaire ou du panneau peuvent être, selon une liste non limitative, dans les domaines du bâtiment, des véhicules terrestres, du nautisme, de l’aéronautique, de l’emballage, de l’horticulture ou la viticulture, de l’ameublement ... [0043] These uses of the honeycomb structure or of the panel can be, according to a non-exhaustive list, in the fields of building, land vehicles, boating, aeronautics, packaging, horticulture or viticulture, furniture...
[0044] Plus particulièrement la structure alvéolaire selon la présente invention peut être utilisée en viticulture, ou en horticulture, en particulier à l’état déployée des alvéoles avec remplissage desdites alvéoles avec un support de culture, tel que du terreau, mettant ainsi à profit les propriétés à la fois d’isolation thermique (par exemple contre le gel) et de résistance à l’eau du matériau à base de liège. More particularly, the honeycomb structure according to the present invention can be used in viticulture, or in horticulture, in particular in the deployed state of the cells with filling of said cells with a growing medium, such as potting soil, thus taking advantage the properties of both thermal insulation (eg against frost) and water resistance of the cork-based material.
[0045] Brève description des dessins [0045] Brief description of the drawings
[0046] L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation, en référence aux dessins annexés dans lesquels : The invention will be better understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:
[0047] [Fig. 1] est un schéma représentant partiellement une structure alvéolaire selon la présente invention, [0047] [Fig. 1] is a diagram partially representing a honeycomb structure according to the present invention,
[0048] [Fig. 2] est un schéma représentant un panneau incorporant une structure alvéolaire selon l'invention, [0048] [Fig. 2] is a diagram representing a panel incorporating a honeycomb structure according to the invention,
[0049] [Fig. 3] est un schéma montrant un dispositif de fabrication d'une structure alvéolaire, selon l'invention, par couture, [0049] [Fig. 3] is a diagram showing a device for manufacturing a honeycomb structure, according to the invention, by sewing,
[0050] [Fig. 4] est un schéma montrant un dispositif de fabrication d'une structure alvéolaire, selon l'invention, au moyen de rubans de thermocollage, [0050] [Fig. 4] is a diagram showing a device for manufacturing a honeycomb structure, according to the invention, by means of heat-sealing tapes,
[0051] [Fig.5] est une vue de côté en perspective du dispositif schématisé à la figure[0051] [Fig.5] is a perspective side view of the device shown schematically in FIG.
4 [0052] [Fig. 6] est une autre vue de côté en perspective du dispositif de la figure 5,4 [0052] [Fig. 6] is another perspective side view of the device of Figure 5,
[0053] [Fig. 7] est un schéma montrant un dispositif de fabrication d'une structure alvéolaire selon l'invention par alternance de liaison par couture et au moyen de rubans de thermocollage. [0053] [Fig. 7] is a diagram showing a device for manufacturing a honeycomb structure according to the invention by alternating connection by sewing and by means of heat-sealing tapes.
[0054] En se référant aux figures, la figure 1 montre un exemple partiel de structure alvéolaire 1 dans laquelle une alternance de bandes dénommées ci-après impaires 3 et bandes paires 4 sont assemblées par des alignements de zones de liaison 5, l'alignement des zones de liaison d'une bande impaire avec la bande paire adjacente étant décalée axialement de l'alignement des zones de liaison des couples de bandes adjacentes. Comme cela sera décrit plus loin les zones de liaison peuvent être des points de couture 8 ou des rubans thermocollés 6. Referring to the figures, Figure 1 shows a partial example of a honeycomb structure 1 in which an alternation of strips hereinafter referred to as odd 3 and even strips 4 are assembled by alignments of connecting zones 5, the alignment connecting zones of an odd strip with the adjacent even strip being axially offset from the alignment of the connecting zones of the pairs of adjacent strips. As will be described later, the connection zones can be stitches 8 or heat-sealed tapes 6.
[0055] Le matériau constitutif des bandes est à base de liège aggloméré avec un liant comme par exemple du polyuréthane ou de la subérine. L'épaisseur desdites bandes peut être comprise entre 0,5 mm et plusieurs mm, de préférence entre 1 mm et 3 mm. The constituent material of the bands is based on cork agglomerated with a binder such as polyurethane or suberin. The thickness of said strips can be between 0.5 mm and several mm, preferably between 1 mm and 3 mm.
[0056] A l'état déployé de la structure alvéolaire 1 , l'espace entre deux bandes adjacentes donne naissance à des alvéoles 2 de type nid d'abeille entre les zones de liaison 5. In the deployed state of the honeycomb structure 1, the space between two adjacent bands gives rise to cells 2 of the honeycomb type between the connecting zones 5.
[0057] Comme schématisé sur la figure 2, la structure alvéolaire à l'état déployée constitue l'âme d'un panneau 11 disposé entre deux feuilles ou plaques 12. Ces feuilles ou plaques 12 peuvent être également à base de liège ou d'un autre matériau pour conférer diverses propriétés audit panneau (rigidification, isolation, complémentaire, parement, ...). As shown schematically in Figure 2, the honeycomb structure in the deployed state constitutes the core of a panel 11 disposed between two sheets or plates 12. These sheets or plates 12 can also be based on cork or another material to impart various properties to said panel (stiffening, insulation, complementary, facing, etc.).
[0058] Plusieurs modes de fabrication de la structure alvéolaire 1 selon l'invention sont envisagés dans lesquels les zones de liaison entre les bandes sont réalisées par couture (figure 3), au moyen de rubans thermocollés (figures 4, 5 et 6) ou par une combinaison de ces deux techniques (figure 7). Several manufacturing methods of the honeycomb structure 1 according to the invention are envisaged in which the connecting zones between the bands are made by sewing (Figure 3), by means of heat-sealed tapes (Figures 4, 5 and 6) or by a combination of these two techniques (Figure 7).
[0059] Les dispositifs de fabrication des différents panneaux incorporant la structure alvéolaire selon l'invention sont schématisés dans les figures suivantes 3 à 7. The manufacturing devices of the various panels incorporating the honeycomb structure according to the invention are shown schematically in the following figures 3 to 7.
[0060] Dans le dispositif d'un mode de réalisation du procédé de fabrication par couture schématisé sur la figure 3, les feuilles de liège ou à base de liège qui vont constituer les bandes de la structure alvéolaire 1 sont amenées au moyen d'un rouleau 13. Un chargeur 14 de rouleaux peut être prévu à proximité. Dans le sens de défilement desdites feuilles, le dispositif de fabrication comporte un premier outil télescopique et mobile de couture 15, au moins un second outil de couture 16, un outil de découpe des bandes 17 qui peut être un massicot, un cutter rotatif ou en variante un dispositif de découpe par laser, un second outil de couture 17 des bandes découpées puis un dispositif de type peigne 18 fixé sur un axe rotatif pour l'assemblage de la structure alvéolaire et son déploiement. In the device of one embodiment of the manufacturing process by sewing schematized in Figure 3, the cork or cork-based sheets which will form the strips of the honeycomb structure 1 are brought by means of a roller 13. A roller loader 14 can be provided nearby. In the running direction of said sheets, the manufacturing device comprises a first telescopic and mobile sewing tool 15, at least one second sewing tool 16, a strip cutting tool 17 which can be a cutter, a rotary cutter or variant a laser cutting device, a second sewing tool 17 cut strips and then a comb type device 18 fixed on a rotary axis for the assembly of the honeycomb structure and its deployment.
[0061] La structure alvéolaire 1 passe ensuite dans une roue d'entraînement 19 en direction de la partie de mise en sandwich de la structure alvéolaire entre deux feuilles ou plaques amenées par des rouleaux 20 et 21 pour former un panneau selon la présente invention. The honeycomb structure 1 then passes through a drive wheel 19 towards the sandwiching part of the honeycomb structure between two sheets or plates fed by rollers 20 and 21 to form a panel according to the present invention.
[0062] Le dispositif pour la mise en sandwich 22 comporte des rouleaux de collage et de compression des plaques ou feuilles 20 et 21 contre ladite structure alvéolaire 1. The device for sandwiching 22 comprises rollers for bonding and compressing the plates or sheets 20 and 21 against said honeycomb structure 1.
[0063] La figure 4 schématise le dispositif d'assemblage des bandes de la structure alvéolaire au moyen de rubans de thermocollage 23 alimentés par des rouleaux 24. L'assemblage d'une partie des rubans de thermocollage est effectué au poste 25 puis au second poste 26. Un dispositif de découpe 17 de type massicot ou cutter rotatif est également prévu pour découper le matériau en bandes. Dans le sens de défilement des bandes, un dispositif de compression 27 à chaud est prévu pour l'assemblage final des bandes. [0063] Figure 4 schematizes the device for assembling the strips of the honeycomb structure by means of heat-sealing tapes 23 fed by rollers 24. The assembly of part of the heat-sealing tapes is carried out at station 25 then at the second station 26. A cutting device 17 of the cutter or rotary cutter type is also provided for cutting the material into strips. In the running direction of the strips, a hot compression device 27 is provided for the final assembly of the strips.
[0064] La structure alvéolaire est ensuite entraînée par la roue d'entraînement 19 vers la partie de mise en sandwich de la structure entre deux feuilles 20 et 21 comme présenté pour la couture pour le dispositif de la figure 3. The honeycomb structure is then driven by the drive wheel 19 towards the sandwiching part of the structure between two sheets 20 and 21 as shown for the sewing for the device of Figure 3.
[0065] Les figures 5 et 6 reprennent les mêmes références que la figure 4 en rendant plus visible les différents éléments de ce dispositif de fabrication au moyen de rubans de thermocollage. Figures 5 and 6 use the same references as Figure 4, making the various elements of this manufacturing device more visible by means of heat-sealing tapes.
[0066] Enfin la figure 7 regroupe des postes à la fois d'assemblage par couture et d'assemblage par rubans de thermocollage 23. Les numéros de référence s'appliquant à cette figure 7 sont identiques à ceux des figures 3 et 4. [0067] Dans les exemples de réalisation présentés sur les figures 3 à 7 le rouleau 13 d'amenée des feuilles de liège ou à base de liège déroule ces dernières dans le sens de défilement F dans le dispositif de fabrication ; ce mode de réalisation limite la largeur des panneaux à la dimension de la laize des feuilles de liège commercialisées actuellement. En variante, le rouleau 13 peut être disposé selon un axe perpendiculaire au dispositif de fabrication, c'est à dire permettre le déroulement séquentiel de feuilles de liège ou à base de liège transversalement au sens de défilement F dans le dispositif de fabrication ; la longueur de chacune de ces feuilles, qui correspond alors à la largeur du panneau à réaliser, permet ainsi la production de panneaux de grande largeur si nécessaire. Finally, Figure 7 groups together positions for both assembly by sewing and assembly by heat-sealing tapes 23. The reference numbers applying to this Figure 7 are identical to those of Figures 3 and 4. In the exemplary embodiments shown in Figures 3 to 7 the roller 13 for supplying cork or cork-based sheets unrolls the latter in the direction of travel F in the manufacturing device; this embodiment limits the width of the panels to the dimension of the width of the cork sheets currently marketed. As a variant, the roller 13 can be arranged along an axis perpendicular to the manufacturing device, that is to say allowing the sequential unwinding of cork or cork-based sheets transversely to the direction of travel F in the manufacturing device; the length of each of these sheets, which then corresponds to the width of the panel to be produced, thus allows the production of very wide panels if necessary.
[0068] Les dispositifs présentés ici aux figures 3 à 7 permettent une fabrication en continu de la structure alvéolaire et de son incorporation en tant qu'âme dans des panneaux. The devices shown here in Figures 3 to 7 allow continuous manufacture of the honeycomb structure and its incorporation as a core in panels.
[0069] De plus, contrairement aux procédés de fabrication de structures alvéolaires en papier ou carton nécessitant un encollage suivi de plusieurs passages successifs dans des fours, impliquant des machines de grande longueur, ou contrairement aux procédés de l’art antérieur d’assemblage de blocs ou feuilles de liège par collage nécessitant des temps de séchage importants (par exemple d’au moins 24 heures à température ambiante en utilisant des colles vinyliques), le procédé selon la présente invention est rapide et ne nécessite pas de passage dans un four. Seule l'étape de compression s'effectue à chaud dans le mode de réalisation au moyen de rubans thermocollés. [0069] Moreover, contrary to the processes for manufacturing alveolar structures in paper or cardboard requiring gluing followed by several successive passages in ovens, involving very long machines, or contrary to the processes of the prior art for assembling blocks or sheets of cork by gluing requiring long drying times (for example at least 24 hours at room temperature using vinyl glues), the method according to the present invention is rapid and does not require passage through an oven. Only the compression step is carried out hot in the embodiment by means of heat-sealed tapes.
[0070] Le procédé selon l'invention est ainsi également moins énergivore. The method according to the invention is thus also less energy-intensive.

Claims

Revendications Claims
[Revendication 1] Structure alvéolaire (1), notamment formée d’alvéoles (2) de type nid d’abeille, étirable, formée de bandes (3 ,4) longitudinales présentant deux faces opposées, lesdites bandes étant disposées côte à côte en se faisant face, chaque bande étant assemblée à la face en regard de la bande adjacente par un alignement de zones de liaison (5), l’alignement des zones de liaison de l’une des faces d’une bande étant décalé axialement de l’alignement des zones de liaison de la face opposée caractérisée en ce que les bandes sont en matériau à base de liège aggloméré avec un liant et en ce que les zones de liaison (5) comprennent des points de couture et/ou des zones d’adhésion par collage. [Claim 1] Honeycomb structure (1), in particular formed of cells (2) of the honeycomb type, stretchable, formed of longitudinal strips (3, 4) having two opposite faces, said strips being arranged side by side in facing each strip being assembled to the opposite face of the adjacent strip by an alignment of connecting zones (5), the alignment of the connecting zones of one of the faces of a strip being offset axially from the alignment of the bonding zones of the opposite face characterized in that the bands are made of material based on agglomerated cork with a binder and in that the bonding zones (5) comprise stitches and/or adhesion zones by gluing.
[Revendication 2] Structure alvéolaire selon la revendication 1 caractérisée en ce que les zones d’adhésion comprennent des zones thermocollées. [Claim 2] Honeycomb structure according to claim 1, characterized in that the adhesion zones comprise heat-bonded zones.
[Revendication 3] Structure alvéolaire selon la revendication 2 caractérisée en ce que les zones d’adhésion comprennent des rubans thermocollés (6). [Claim 3] Honeycomb structure according to Claim 2, characterized in that the adhesion zones comprise heat-sealed tapes (6).
[Revendication 4] Structure alvéolaire selon l’une quelconque des revendications précédentes caractérisée en ce que le matériau formant lesdites bandes est un mélange de liège et d'un matériau élastomère, tel que le caoutchouc, sous forme de poudre et/ou de granules agglomérés. [Claim 4] Honeycomb structure according to any one of the preceding claims, characterized in that the material forming said strips is a mixture of cork and an elastomeric material, such as rubber, in the form of powder and/or agglomerated granules .
[Revendication 5] Structure alvéolaire selon l’une quelconque des revendications précédentes caractérisée en ce que le liant du liège aggloméré est un polymère synthétique, tel que du polyuréthane (PU), ou un polymère biosourcé, tel que l’acide polylactique (PLA), la subérine ou autre résine naturelle. [Claim 5] Honeycomb structure according to any one of the preceding claims, characterized in that the binder of the agglomerated cork is a synthetic polymer, such as polyurethane (PU), or a bio-based polymer, such as polylactic acid (PLA) , suberin or other natural resin.
[Revendication 6] Panneau (11 ) comprenant une structure alvéolaire selon l’une quelconque des revendications précédentes formant, à l’état étiré par déploiement des alvéoles, l’âme dudit panneau et étant disposée entre deux plaques (12) ou feuilles, lesdites plaques ou feuilles étant de préférence également en matériau à base de liège aggloméré avec un liant. [Claim 6] Panel (11) comprising a honeycomb structure according to any one of the preceding claims forming, in the stretched state by deployment of the cells, the core of said panel and being disposed between two plates (12) or sheets, said plates or sheets preferably also being made of material based on agglomerated cork with a binder.
[Revendication 7] Panneau selon la revendication 6 caractérisé en ce que les alvéoles (2) déployées de la structure alvéolaire (1) à l’état étiré sont au moins partiellement remplies d’un second matériau isolant thermique et/ou acoustique et/ou vibratile. [Claim 7] Panel according to Claim 6, characterized in that the cells (2) deployed from the cellular structure (1) in the stretched state are at least partially filled with a second thermal and/or acoustic insulating material and/or vibration.
[Revendication 8] Procédé de fabrication d’un panneau selon l’une des revendications 6 ou 7, comprenant les étapes successives suivantes : -fourniture, sous forme d’un premier rouleau et d’un second rouleau, de plaques/feuilles à base de liège aggloméré, lesdits premier et second rouleaux (13) ayant des axes parallèles entre eux, [Claim 8] Process for manufacturing a panel according to one of Claims 6 or 7, comprising the following successive steps: - supplying, in the form of a first roll and a second roll, of plates/sheets based of agglomerated cork, said first and second rollers (13) having axes parallel to each other,
-déroulage des plaques/feuilles et réalisation d’une première série de zones de liaisons parallèles aux bords longitudinaux des plaques/feuilles par couture et/ou thermocollage, - unrolling of the plates/sheets and production of a first series of connection zones parallel to the longitudinal edges of the plates/sheets by sewing and/or heat-sealing,
-découpe des plaques/feuilles en bandes transversalement au sens de déroulage des plaques/feuilles, - cutting of the plates/sheets into strips transversely to the direction of unwinding of the plates/sheets,
-superposition alternée des bandes découpées et réalisation d’une deuxième série de zones de liaison des bandes par couture et/ou thermocollage, les zones de liaison (5) de la deuxième série étant décalées axialement par rapport aux premières zones de liaison, - éventuellement compression des bandes superposées, en cas de thermocollage desdites bandes, -alternate superposition of the cut strips and production of a second series of strip bonding zones by sewing and/or heat-sealing, the bonding zones (5) of the second series being axially offset with respect to the first bonding zones, - optionally compression of the superimposed strips, in the event of heat sealing of said strips,
- dépliage des bandes superposées pour obtenir ladite structure alvéolaire- unfolding of the superimposed strips to obtain said honeycomb structure
(1 ). (1 ).
- insertion et fixation, de préférence par collage, de ladite structure alvéolaire (1 ) entre deux plaques (12) ou feuilles pour former ledit panneau (11 ). - insertion and fixing, preferably by gluing, of said honeycomb structure (1) between two plates (12) or sheets to form said panel (11).
[Revendication 9] Procédé de fabrication d’un panneau selon l’une des revendications 6 ou 7, comprenant les étapes successives suivantes : -fourniture, sous forme d’un rouleau (13), d’une plaque/feuille à base de liège aggloméré, -déroulage de ladite plaque/feuille et découpe transversale de ladite plaque/feuille en bandes longitudinales (2,3), [Claim 9] Process for manufacturing a panel according to one of Claims 6 or 7, comprising the following successive steps: - supplying, in the form of a roll (13), of a plate/sheet based on cork chipboard, - unrolling of said plate/sheet and transverse cutting of said plate/sheet into longitudinal strips (2,3),
- création de zones de liaisons transversales par couture pour former des bandes longitudinales cousues disposées de telle manière que l’alignement des zones de liaison de l’une des faces d’une bande est décalé axialement de l’alignement des zones de liaison de la face opposée d’une bande adjacente- creation of transverse connection zones by sewing to form sewn longitudinal strips arranged in such a way that the alignment of the connection zones of one of the faces of a strip is axially offset from the alignment of the connection zones of the opposite side of an adjacent band
- dépliage des bandes superposées pour obtenir la structure alvéolaire (1), -insertion et fixation, de préférence par collage, de ladite structure alvéolaire (1 ) entre deux plaques (12) ou feuilles pour former ledit panneau (11 ). - unfolding of the superimposed strips to obtain the honeycomb structure (1), -insertion and fixing, preferably by gluing, of said honeycomb structure (1) between two plates (12) or sheets to form said panel (11).
[Revendication 10] Utilisation de la structure alvéolaire (1) selon l’une des revendications 1 à 5 ou du panneau (11 ) selon l’une des revendications 6 ou 7 en tant qu’isolant thermique et/ou acoustique et/ou vibratile, élément de protection ou d’emballage, élément amortisseur de chocs, élément résistant à la compression, élément flottant, les alvéoles pouvant être vides ou au moins partiellement remplies. [Claim 10] Use of the honeycomb structure (1) according to one of Claims 1 to 5 or of the panel (11) according to one of Claims 6 or 7 as thermal and/or acoustic and/or vibration insulation , protective or packaging element, shock-absorbing element, compression-resistant element, floating element, the cells possibly being empty or at least partially filled.
[Revendication 11] Utilisation selon la revendication 10 dans les domaines du bâtiment, des véhicules terrestres, du nautisme, de l’aéronautique, de l'emballage, de l'horticulture ou la viticulture, de l'ameublement... [Revendication 12] Utilisation de la structure alvéolaire (1) selon l’une des revendications 1 à 5 en viticulture, ou en horticulture, en particulier à l’état déployée des alvéoles (2) avec remplissage desdites alvéoles avec un support de culture, tel que du terreau. [Claim 11] Use according to claim 10 in the fields of construction, land vehicles, boating, aeronautics, packaging, horticulture or viticulture, furniture... [Claim 12 ] Use of the honeycomb structure (1) according to one of claims 1 to 5 in viticulture, or in horticulture, in particular in the deployed state of the cells (2) with filling of said cells with a culture medium, such as potting soil.
EP22735523.7A 2021-04-29 2022-04-25 Cork-based cellular structure, method for manufacturing panels incorporating said structure, and uses thereof Pending EP4330034A1 (en)

Applications Claiming Priority (2)

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FR2104469A FR3122353B1 (en) 2021-04-29 2021-04-29 Alveolar structure based on cork, process for manufacturing panels incorporating said structure, and uses thereof
PCT/FR2022/050778 WO2022229551A1 (en) 2021-04-29 2022-04-25 Cork-based cellular structure, method for manufacturing panels incorporating said structure, and uses thereof

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Publication number Priority date Publication date Assignee Title
FR2486874A1 (en) 1979-07-19 1982-01-22 United Kingdom Government IMPROVED HONEYCOMB STRUCTURE AND MANUFACTURING METHOD
FR2465039A1 (en) * 1979-09-17 1981-03-20 Bruguiere Christian Insulating panel for partition walls - has cork core covered on each side with glass fibre with resin coating
FR2925863B1 (en) * 2007-12-26 2010-02-12 Afitex Internat CIPO - Patent - 2386030 Canadian Intellectual Property Office Symbol of the Government of Canada CA 2476050 METHOD OF FORMING ALVEOL PRODUCTS BY STAPLING BANDS, METHOD AND EQUIPMENT FOR MANUFACTURING ALVEOLAR PRODUCT PROCEDE.
US8206546B2 (en) * 2008-06-13 2012-06-26 The Boening Company Heat shield having strain compliant matrix and method of forming same
WO2017130170A1 (en) 2016-01-29 2017-08-03 Sedacor-Sociedade Exportadora De Artigos De Cortiça, Lda Cork yarn, production method and uses

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