Insulating cover panel having a reduced carbon footprint

Abstract

The invention relates to a composite structural and / or cover and / or decorative panel (1) comprising a core (2) sandwiched between two metal plates (3), the connection between the core (2) and each of the metal plates (3) being obtained by means of an adhesive layer providing the interface between the core (2) and each of the metal plates (3). According to the invention, the panel is characterised in that the core (2) comprises at least one mixture or one combination of a filler material, originating from a first family of materials including cork, mycelium and vermiculite, perlite and calcium silicate or a mixture of a plurality of said materials, and at least one binder material.

Description

[0001] ROOF INSULATION PANEL FEATURING A

[0002] REDUCED CARBON FOOTPRINT

[0003] technical field

[0004] The present invention relates to the general technical field of construction and more particularly to the field of building facades or roofs. The invention also relates to all technical or industrial fields in which the use of thermal and / or acoustic insulation is necessary.

[0005] The invention relates in particular to the design and manufacture of cladding elements, roofing panels and composite panels that can be used to cover large areas of facades, for example of high-rise buildings.

[0006] The invention also relates to interior sound and / or thermal insulation panels for buildings. The invention further relates to recreational vehicles, cruise ships, transport trucks and trailers, as well as the manufacture of any wall requiring specific mechanical, thermal, and / or acoustic properties.

[0007] Previous technique

[0008] For example, we know of panels shaped into cladding cassettes for covering building facades. These panels have a polyethylene core sandwiched between two aluminum sheets. The use of polyethylene allows for a substantial reduction in the weight of the composite panels, but it also has drawbacks.

[0009] Indeed, such composite panels with a polyethylene core or any other petroleum-based material do not protect, or only very weakly protect, from heat and / or cold and do not provide sound insulation.

[0010] Furthermore, a polyethylene core offers no fire resistance; on the contrary, it contributes to accelerating the spread of a fire. This is why fire safety standards in various countries no longer permit the use of composite roofing panels with a polyethylene core, particularly on buildings exceeding 8 meters in height.

[0011] Furthermore, a polyethylene material, with a usual thickness, does not provide sound and thermal insulation and is not associated with an additional insulating layer in the products available to date.

[0012] It should also be noted that some known materials may contain a resin-type binder, which is combustible at high temperatures, even if it remains non-flammable. Therefore, this type of product cannot be used on high-rise buildings.

[0013] For example, document CA 2 887 519 describes a composite panel with a core sandwiched between two metal plates. The core would contain fibers and fillers, such as minerals and organic binders. These panels would be difficult to industrialize, and the materials identified only generically would be neither bio-based, nor easily recyclable, nor sound-insulating, nor thermally insulating.

[0014] Presentation of the invention

[0015] The object of the invention is therefore to overcome the disadvantages of the prior art by proposing a new composite panel for structure, covering or decoration, exhibiting thermal and acoustic insulation properties and meeting new environmental and climate change constraints and standards.

[0016] Another object of the invention aims to propose a new composite panel exhibiting greatly improved fire-resistant properties compared to known composite panels.

[0017] Another object of the invention aims to propose a new composite panel made essentially with natural and / or bio-based materials to reduce the carbon footprint of said panel.

[0018] Another object of the invention is to propose a new composite panel with a low weight, while exhibiting satisfactory mechanical strength.

[0019] Another object of the invention is to provide a new composite panel, incorporating a natural or bio-based product, whose industrial manufacture is simple and economical. Another object of the invention is to provide a new, fully recyclable composite panel.

[0020] Another object of the invention aims to propose a new composite panel, for example for a facade that can easily serve as a support for an added technology, such as solar panel glass or paint, sprinkler system or additional insulation.

[0021] The objects assigned to the invention are achieved using a composite structural and / or covering and / or decorative panel, comprising a core sandwiched between two metal plates, the bond between the core and each of the metal plates being obtained by means of an adhesive layer forming the interface between said core and each of said metal plates, characterized in that the core comprises at least one mixture or association of, on the one hand, a filling material from a first family of materials including cork, mycelium, vermiculite, perlite and calcium silicate or a mixture of several of said materials and, on the other hand, at least one binding material.

[0022] According to one example, the binding material comes from a second family of materials including hydraulic lime, calcium silicate, calcium carbonate and cement.

[0023] In another embodiment, the bonding material comprises a hot melt adhesive, also known as a "hot melt" adhesive. For example, "Hot Melt PSA" adhesive is a suitable example.

[0024] According to one embodiment example, the adhesive layers at the interfaces of the core and the metal plates are made with hot glue.

[0025] According to one embodiment, the core comprises at least one layer of a mixture of materials in the form of flakes and / or grains and / or powders, the grains having a particle size between 0.1 mm and 10 mm and preferably between 0.1 mm and 4 mm.

[0026] According to an exemplary embodiment, the proportion by volume relative to the total volume of the core of material or mixture of materials of the first family is between 40% and 99%, and preferably between 70% and 90%. According to an exemplary embodiment, the core has a thickness of between 2 mm and 100 mm, and preferably greater than 2 mm.

[0027] According to one example, the metal plates have a thickness of between 0.1 mm and 5 mm.

[0028] According to one example of implementation, the metal plates have at least one powder-coated, varnished or anodized face.

[0029] According to one embodiment, the metal plates include at least one plate made of aluminium, steel, stainless steel or titanium.

[0030] The objects assigned to the invention are also achieved using a thermal and / or acoustic building insulation element comprising at least one composite panel as shown above.

[0031] The objects assigned to the invention are also achieved using a cladding cassette comprising at least one composite panel as presented above, the metal plate intended to make the exterior side of said cladding cassette and the facade covering having larger dimensions than the other metal plate so as to have edges folded at right angles towards said other metal plate to form said cladding cassette, the edges folded on each lateral side of the composite panel having notches for mounting on a support structure attached to a facade.

[0032] The objects assigned to the invention are also achieved using another cladding cassette comprising at least one composite panel as presented above, said composite panel comprising metal plates of the same dimensions and having edges folded at right angles, to form said cladding cassette, the edges folded on each lateral side of the composite panel having notches for mounting on a support structure attached to a facade.

[0033] The objects assigned to the invention are also reached using a roof covering comprising an assembly of composite panels as shown above.

[0034] The objects assigned to the invention are also achieved using a manufacturing process for a composite panel as presented above, characterized in that it comprises the steps: - a) using materials from the first and second families of materials to form a continuous strip constituting the core,

[0035] - b) deposit at least one adhesive layer on one upper and one lower face of the continuous strip at the inlet of a laminating unit,

[0036] - c) supply the laminating unit with a continuous strip of metal on the upper and lower surfaces, each coated with an adhesive layer,

[0037] - d) compress the assembly thus produced in the laminating unit,

[0038] - e) deliver a composite strip at the output of the laminating unit, and

[0039] - f) cut the composite strip into composite panels.

[0040] According to one example of implementation, the process includes the formation of the core by making successive and alternating deposits of the filler material and hot glue to form a continuous strip.

[0041] According to another example of implementation, the process includes the formation of the core by mixing the filler material and the binder material to form a continuous strip.

[0042] According to one example of implementation, the application of an adhesive layer is carried out by spraying hot glue.

[0043] In another implementation example, the adhesive layer is applied using a hot-melt adhesive film or a double-sided adhesive. Such an adhesive is offered, for example, by the company ADHEX and marketed under the terms "Acrylic adhesive transfer" or "Solventless adhesive transfer".

[0044] According to one example of implementation, the process includes, at the outlet of the laminating unit, the introduction of the composite strip thus obtained into a furnace to raise it to a temperature between 75°C and 220°C, for a determined time to melt the adhesive layers and establish adhesion between the core and the continuous metal strips on the one hand, and between the constituent materials of the core on the other hand, and

[0045] - cooling the composite strip thus produced at ambient air after it exits the oven.

[0046] A notable advantage of the composite panel according to the invention lies in its improved thermal and acoustic performance thanks to the use of an optimized insulating core. Furthermore, the composite panel according to the invention is characterized by enhanced fire resistance.

[0047] Indeed, the core of a panel conforming to the invention exhibits enhanced fire-resistant properties due to the use of a non-combustible material (mineral binder) mixed with a natural or bio-based material. Depending on the required level of fire resistance, it is possible to select an appropriate mass proportion of the non-combustible material, for example calcium silicate, to mix with the natural or bio-based material (cork, mycelium, vermiculite, or perlite).

[0048] In the embodiment example in which the core contains a hot glue type binder, remarkably, the aforementioned performance is not degraded given the limited quantity of binder material used.

[0049] Furthermore, the thermal inertia of cork, vermiculite, or mycelium allows for effective weatherproofing. It is therefore possible to reduce the thickness of the thermal insulation layer placed between a facade and the composite panels according to the invention.

[0050] Another significant advantage is achieved through the use of natural and / or bio-based materials, such as cork or mycelium, perlite or calcium silicate, of which substantial renewable production is available throughout the European Union. Vermiculite is also a widely available natural product. Such materials eliminate the need for petroleum-based products.

[0051] Cork, vermiculite, perlite, calcium silicate and mycelium are natural and / or bio-based materials, but also rot-proof.

[0052] The composite panels manufactured according to the invention, comprising a mineral binder or a hot-melt adhesive-based binder, can therefore be easily and completely dismantled and recycled. Indeed, all the constituent materials of a composite panel according to the invention can be separated and reused, including the hot-melt adhesive.

[0053] In one interesting example, mixing cork with vermiculite during the core manufacturing process reduces the core's calorific value. The resulting core therefore has the advantage of being non-flammable.

[0054] Another advantage lies in the rigidity and strength achieved for composite panels conforming to the invention, despite their lightness. For example, contrary to expectations, a mixture of cork and a binder does not substantially affect the cohesion of the core and its mechanical strength.

[0055] Another advantage of the composite panel according to the invention lies in its remarkable sound insulation properties. The sound insulation performance obtained is far superior to that obtained with petroleum-based products of similar thickness.

[0056] The use of materials incorporating or containing cork or bio-based mycelium makes it possible to substantially reduce the carbon footprint for such composite panels.

[0057] The composite panel according to the invention is also made entirely of non-polluting materials. These materials are fully recyclable and can be reused to manufacture new identical or similar composite panels.

[0058] Another advantage of the composite panel according to the invention lies in the possibility of using it for or integrating it into countless architectural or industrial applications.

[0059] For this purpose we can cite the field of architecture and in particular the cladding of buildings, curtain walls and shading elements, roofs and coverings, canopies, house gables, ceilings, walls, mobile or fixed partitions to isolate workspaces, decorative panels, interior lining panels, doors, site fences, industrial buildings, agricultural sheds, construction components, prefabricated buildings, window sills and frames, tiles for buildings and houses, sandwich panels or composite panels, gutters, drainage pipes.

[0060] We can also mention the field of signage and advertising, including totems, car dealerships, gas stations, restaurant chains, billboards, and road signs. We can also mention the field of packaging, particularly pharmaceutical and food packaging.

[0061] We can also mention the automotive sector, particularly bodywork, caravans, motorhomes, and more broadly, the transportation sector. For example, we can cite the interior partitions of recreational vehicles (caravans, motorhomes), cruise ships, as well as the interior / exterior partitions of transport trucks and refrigerated trucks.

[0062] We can also mention the field of household appliances, and in particular household appliances, refrigerators, freezers.

[0063] We can also mention the industrial sector in the broadest sense, namely elements used and / or manufactured industrially and in particular machine protection, containers, heat pumps, vehicles, public transport vehicles, lighting fixtures, kitchen splashbacks, computer equipment, suitcases, in-ground or above-ground swimming pools, protective devices.

[0064] The composite panel according to the invention therefore constitutes a kind of raw material whose transformation and adaptation for the different intended uses are extremely varied.

[0065] Brief description of the figures

[0066] Other features and advantages of the present invention will become more apparent upon reading the following description, made with reference to the accompanying drawings, given by way of non-limiting examples, in which:

[0067] • Figure 1 is a perspective view of an example of an embodiment of a composite roofing panel according to the invention,

[0068] • Figure 2 schematically illustrates an example of a manufacturing unit for a composite roofing panel according to the invention,

[0069] • Figure 3 schematically illustrates another example of a manufacturing unit for a composite roofing panel according to the invention,

[0070] • Figure 4 shows an example of a cladding cassette according to the invention, made with a roofing panel of Figure 1, and Figure 5 illustrates an example of the assembly of cladding cassettes according to the invention.

[0071] RECTIFIED SHEET (RULE 91) ISA / EP to the invention on a facade.

[0072] Detailed description of the invention

[0073] Structurally and functionally identical elements present on several distinct figures are assigned the same numerical or alphanumeric reference.

[0074] Figure 1 is a perspective view of an example of the realization of a composite panel 1. The composite panel 1 has a core 2 sandwiched between two metal plates 3.

[0075] The bond between the core 2 and each of the metal plates 3 is obtained by means of an adhesive layer in the form of an adhesion film 4, creating the interface between said core 2 and each of said metal plates 3. The adhesive layer is for example a hot-melt adhesion film 4.

[0076] According to another example of implementation, the adhesive layer is an industrial double-sided adhesive tape allowing for cold bonding.

[0077] Core 2 includes in part a filling material, preferably bio-based, chosen from a family of materials including cork and mycelium, vermiculite, perlite or calcium silicate or an association or combination of several of said materials.

[0078] Core 2 advantageously comprises the filling material and at least one binding material from a second family of materials including hydraulic lime, mineral vermiculite, calcium silicate, calcium carbonate and cement.

[0079] For example, when the binder is calcium silicate, the filler material may also contain calcium silicate, but mixed with another filler material. This other filler material could, for example, be hydraulic lime.

[0080] This second family of materials advantageously includes any other material constituting a hydraulic binder obtained from a mineral material.

[0081] According to one embodiment, the core 2 is a compressed mixture of materials in the form of beads, grains or powders. The grains then advantageously have a particle size between 0.1 mm and 10 mm and preferably between 0.1 mm and 4 mm.

[0082] According to an example of an embodiment, the proportion by volume relative to the total volume of core 2, of material or mixture of materials from the first family (natural or bio-based materials) is between 40% and 99%. This proportion by volume is more preferably between 70% and 90%.

[0083] Figure 2 schematically illustrates an example of a composite panel manufacturing unit 1. In such a manufacturing unit, the core 2 is pre-conditioned into a continuous strip 6, for example, by extrusion. According to one implementation example, the continuous strip is unwound from a roll 7.

[0084] In this example, the core 2 is obtained from a mixture of base materials transformed into a continuous strip 6 by extrusion and then packaged in a roll 7. The filling material is a mixture of extruded materials, for example stiffened, for example from cork beads and calcium silicate grains or powders, transformed into a continuous strip 6.

[0085] The metal plates 3 advantageously have faces coated with a protective anti-corrosion varnish, applied by powder coating. Depending on the intended use of the composite panel 1, at least one of its faces may be coated with a special varnish, also applied by powder coating, giving it a particular color and / or appearance. Preferably, at least one face of the metal plates 3 is powder coated, varnished, or anodized.

[0086] The core 2 advantageously has a thickness between 2 mm and 100 mm. The metal plates 3 advantageously have a thickness between 0.2 mm and 5 mm. The choice of this thickness depends on the intended use of the composite panel 1.

[0087] The manufacturing process according to the invention comprises a series of implementation steps.

[0088] According to step a) uses materials from the first and second material families to form the continuous strip 6 constituting the core 2

[0089] According to step b), at least one adhesive layer is deposited on the upper face 6a and on a lower face 6b of the continuous strip 6 at the inlet of a laminating unit 10.

[0090] According to step c), the complexing unit 10 is fed with a continuous strip of metal 11 on the upper face 6a and on the lower face 6b, each covered with an adhesive layer.

[0091] According to step d), the assembly thus produced is compressed in the complexing unit 10.

[0092] Then, according to step e), a composite strip 12 is delivered at the output of the complexing unit 10.

[0093] Finally, according to step f), the composite strip 12 is cut into composite panels 1.

[0094] According to one example of implementation of the manufacturing process, the adhesive layer in the form of an adhesion film 4, from a roll 8a and 8b, is applied respectively to an upper face 6a and to an lower face 6b of the continuous strip 6, at the inlet of a laminating unit 10.

[0095] According to one example of implementing the manufacturing process, the laminating unit 10 is fed with two continuous metal strips 11, for example, continuous aluminum strips, to deposit them respectively on the upper face 6a and the lower face 6b, each covered with an adhesive layer. The continuous metal strips 11 will form the aluminum plates 3 of the composite panel 1.

[0096] According to an example of implementation of the manufacturing process, the assembly thus produced is compressed in the laminating unit 10. As an example, the laminating unit 10 includes two compression rollers 10a and 10b to compress the continuous aluminum strips 11, the core 2 and the superimposed adhesive layers.

[0097] According to an example of implementation of the manufacturing process, a continuous composite strip 12 is delivered at the output of the laminating unit 10.

[0098] When cold compression is insufficient, for example when using a heat-fusible film, the composite strip 12 is conveyed into an oven 13 to be heated to a temperature between 75°C and 220°C for a predetermined period. This period is, for example, between 20 and 30 minutes. The oven 13 is used to melt the adhesive layers or bonding films 4 and, through hot curing, establish the necessary adhesion and mechanical cohesion between the continuous strip 6 and the continuous metal strips 11.

[0099] The process then consists of cooling the composite strip 12 thus produced in ambient air, as it exits the oven 13.

[0100] According to another example of implementing the manufacturing process, the adhesive film 4 is a hot-melt film or a double-sided industrial adhesive applied to the upper face 6a and the lower face 6b of the continuous strip 6. The double-sided adhesive is advantageously unwound from rolls 8a and 8b. The necessary adhesion and mechanical cohesion between the continuous strip 6 and the continuous metal strips 11 are then achieved by cold bonding.

[0101] According to the manufacturing process, the composite strip 12 is cut into composite panels 1, according to the desired dimensions, using all known means.

[0102] According to another implementation example, at least one adhesive layer is sprayed onto the upper face 6a and the lower face 6b of the continuous strip 6 at the inlet of the laminating unit 10.

[0103] As an example, the formation of the core 2 consists of making successive and alternating deposits of the filler material and the hot glue to form the continuous strip 6.

[0104] For example, for a 5 mm thick core 2, it is possible to alternate four layers of filler material and seven layers of hot melt adhesive to form the core 2, covered with outermost adhesive layers that create the interface with the metal plates 3. It is thus possible to obtain, for example, a core 2 with a density of approximately 420 g / m². 2 hot glue.

[0105] According to an advantageous implementation example, hot glue, used as a binder, is also used to form adhesive layers at the interfaces of the core 2 and the metal plates 3.

[0106] Figure 3 schematically illustrates another example of a composite panel manufacturing unit 1. This manufacturing unit illustrates an alternative implementation of the manufacturing process, differing from the method described above in that the continuous strip 6 is extruded from a mixture of materials. This mixture includes, for example, cork and / or mycelium beads and calcium silicate grains. In this alternative implementation, the roller 7 is replaced by an extruder 14.

[0107] The various feed rollers 8a, 8b, l ia, 11b, 7 are advantageously duplicated to prevent a break in the feed and an interruption of the manufacturing process. An empty roller 8a, 8b, l ia, 11b, 7 is then automatically replaced by a full roller 8a, 8b, l ia, 11b, 7.

[0108] Figure 4 represents an example of the production of a cladding cassette 16, made with a composite panel 1 and Figure 5 illustrates an example of mounting cladding cassettes 16 on a support structure 20.

[0109] The cladding cassette 16 preferably comprises a composite panel 1. The metal plate 3, intended to form the exterior side of the cassette and the facade covering, has larger dimensions than the other metal plate 3, so as to have edges 17 folded at right angles towards said other metal plate 3. The edges 17 folded at least on each lateral side of the composite panel 1 have notches 18 for mounting said cladding cassette 16 on the support structure 20 attached to a facade.

[0110] According to another embodiment, the composite panel 1 comprises metal plates 3 of the same dimensions and has edges 17 folded at right angles to form the cladding cassette. In order to be able to fold the edges 17, which are made of the filling material sandwiched between two aluminum plates 3, V-shaped ribs are machined on the outer face of the aluminum plate 3 located on the inner side of said cladding cassette 16, to form the fold lines.

[0111] The folded edges 17 on each lateral side of the composite panel have notches 18 for mounting on the support structure 20.

[0112] In another example of its use, composite panel 1 is intended for roofing. This roofing then comprises an assembly of composite panels 1 equipped with a fastening system. This system is customized according to each roofing or tile manufacturer that uses composite panels 1.

[0113] Depending on the intended use, the composite panel 1 can have significant dimensions, for example up to a length of ten meters and a width of two meters.

[0114] Composite panel 1 is therefore a sandwich material used for example as sound insulation, to insulate meeting rooms, separate workspaces in a mobile or fixed manner, partition interior spaces of motorhomes, caravans, or cruise ships.

[0115] It is clear that the present description is not limited to the explicitly described examples, but also includes other embodiments or implementations. Thus, a described technical feature or implementation step may be replaced by an equivalent technical feature or implementation step, respectively, without departing from the scope of the invention as defined by the claims.

Claims

DEMANDS 1. Composite panel (1) for structure and / or covering and / or decoration, comprising a core (2) sandwiched between two metal plates (3), the bond between the core (2) and each of the metal plates (3) being obtained by means of an adhesive layer forming the interface between said core (2) and each of said metal plates (3), characterized in that the core (2) comprises at least one mixture or association of, on the one hand, a filling material from a first family of materials including cork, mycelium, vermiculite, perlite and calcium silicate or a mixture of several of said materials and, on the other hand, at least one binding material.

2. Composite panel (1) according to claim 1, characterized in that the binding material is derived from a second family of materials comprising hydraulic lime, calcium silicate, calcium carbonate and cement.

3. Composite panel (1) according to claim 1, characterized in that the binding material comprises a hot glue.

4. Composite panel (1) according to any one of claims 1 to 3, characterized in that the adhesive layers at the interfaces of the core (2) and the metal plates (3) are made with hot glue.

5. Composite panel (1) according to any one of claims 1 to 4, characterized in that the core (2) comprises at least one layer of a mixture of materials in the form of flakes and / or grains and / or powders, the grains having a particle size between 0.1 mm and 10 mm and preferably between 0.1 mm and 4 mm.

6. Composite panel (1) according to claim 1 or 2, characterized in that the proportion by volume relative to the total volume of the core (2) of material or mixture of materials of the first family is between 40% and 99% and preferably between 70% and 90%.

7. Composite panel (1) according to any one of claims 1 to 6, characterized in that the core (2) has a thickness between 2 mm and 100 mm.

8. Composite panel (1) according to any one of claims 1 to 7, characterized in that the metal plates (3) have a thickness between 0.1 mm and 5 mm.

9. Composite panel (1) according to any one of claims 1 to 8, characterized in that the metal plates (3) have at least one powder-coated, varnished or anodized face.

10. Composite panel (1) according to any one of claims 1 to 9, characterized in that the metal plates (3) comprise at least one plate of aluminium, steel, stainless steel or titanium.

11. Thermal and / or acoustic insulation element for building comprising at least one composite panel (1) conforming to any one of claims 1 to 10.

12. Cladding cassette (16) comprising at least one composite panel (1) according to any one of claims 1 to 10, the metal plate (3) intended to form the outer side of said cladding cassette (16) and the facade covering having larger dimensions than the other metal plate (3) so as to have edges (17) folded at right angles towards said other metal plate (3) to form said cladding cassette (16), the edges (17) folded on each lateral side of the composite panel (1) having notches (18) for mounting on a support structure (20) attached to a facade.

13. Cladding cassette (16) comprising at least one panel composite (1) according to any one of claims 1 to 10, said composite panel (1) comprising metal plates (3) of the same dimensions and having edges (17) folded at right angles, to form said cladding cassette (16), the edges (17) folded on each lateral side of the composite panel (1) having notches (18) for mounting on a support structure (20) attached to a facade.

14. Roof covering comprising an assembly of composite panels (1) conforming to any one of claims 1 to 10.

15. A method for manufacturing a composite panel (1) according to any one of claims 1 to 10, characterized in that it comprises the steps: - a) use the materials from the first and second families of materials to form a continuous strip (6) constituting the core (2), - b) deposit at least one adhesive layer on an upper face (6a) and on an lower face (6b) of the continuous strip (6) at the inlet of a laminating unit (10), - c) supply the laminating unit (10) with a continuous strip of metal (11) on the upper face (6a) and on the lower face (6b), each covered with an adhesive layer, - d) compress the assembly thus produced in the complexing unit (10), - e) deliver a composite strip (12) at the output of the laminating unit (10), and - f) cut the composite strip (12) into composite panels (1).

16. Manufacturing process according to claim 15, characterized in that it comprises the formation of the core (2) by carrying out successive and alternating deposits of the filling material and the hot glue to constitute a continuous strip (6).

17. A manufacturing process according to claim 15, characterized in that it comprises forming the core (2) by mixing the filler material and the binder material to form a continuous strip (6).

18. A manufacturing method according to any one of claims 15 to 17, characterized in that the deposition of an adhesive layer is carried out by spraying a hot glue.

19. A manufacturing method according to any one of claims 15 to 17, characterized in that the deposition of an adhesive layer is carried out by application of a hot-melt adhesive film (4) or a double-sided adhesive.

20. A manufacturing method according to any one of claims 15 to 19, characterized in that it comprises: - at the outlet of the laminating unit (10), the composite strip (12) thus obtained is introduced into a furnace (13) to raise it to a temperature between 75°C and 220°C, for a determined time to melt the adhesive layers and establish adhesion between the core (2) and the continuous metal strips (11) on the one hand, and between the constituent materials of the core (2) on the other hand, and - cooling the composite strip (12) thus produced at ambient air exiting the oven.

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