WO2021078400A1 - Panneau composite et son procédé de fabrication - Google Patents

Panneau composite et son procédé de fabrication Download PDF

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Publication number
WO2021078400A1
WO2021078400A1 PCT/EP2019/079290 EP2019079290W WO2021078400A1 WO 2021078400 A1 WO2021078400 A1 WO 2021078400A1 EP 2019079290 W EP2019079290 W EP 2019079290W WO 2021078400 A1 WO2021078400 A1 WO 2021078400A1
Authority
WO
WIPO (PCT)
Prior art keywords
closing film
core
composite panel
face
holes
Prior art date
Application number
PCT/EP2019/079290
Other languages
English (en)
Inventor
Dominic Pacal SMITH
Julien TACHON
Original Assignee
Toyota Motor Europe
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 Toyota Motor Europe filed Critical Toyota Motor Europe
Priority to PCT/EP2019/079290 priority Critical patent/WO2021078400A1/fr
Publication of WO2021078400A1 publication Critical patent/WO2021078400A1/fr

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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
    • 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
    • B32B7/08—Interconnection of layers by mechanical means
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/092—Layered products comprising a layer of metal comprising metal 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 comprising epoxy resins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin 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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • 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 shape; Layered products comprising a layer 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 shape; Layered products comprising a layer 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 shape; Layered products comprising a layer 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0076—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised in that the layers are not bonded on the totality of their surfaces
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/146—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby one or more of the layers is 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • 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
    • B32B5/18—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 features of a layer of foamed 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/06—Open cell foam
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2363/00—Epoxy resins
    • 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
    • B32B2605/08—Cars

Definitions

  • the present disclosure relates to a composite panel and a method for manufacturing such a composite panel.
  • Such a composite panel or method is particularly useful to provide light but strong parts able to withstand high bending loads.
  • Such a composite panel or method can be used in any technical field for forming parts of any type. For example, it can be used in the automotive industry for manufacturing automobile parts.
  • Composite sandwich panels are known panels comprising two face sheets separated by a low density core, such as a honeycomb core. These panels show high bending stiffness, as the core separates the face sheets from the bending neutral axis, while having a low weight thanks to the low density core.
  • a proposal to increase the adhesion of face sheets to the core was to select materials for the closing film and the face sheets able to chemically react so as to create chemical links between the closing film and the face sheets.
  • Such a solution brings important constraints in the material selection, thus reducing the design freedom of the panel.
  • the present disclosure relates to a composite panel, comprising a core, having cells open to at least a first face of the core, a closing film, bonded to the first face of the core, a face sheet, bonded to the closing film, wherein the closing film comprises holes, and wherein penetrating portions of the face sheet penetrate at least partially into at least some holes of the closing film to interlock the face sheet with the closing film.
  • this configuration provides a mechanical interlocking ensuring a strong cohesion whatever the materials of the closing film or the face sheet.
  • perforating the closing film, or providing a closing film already perforated is easy so that manufacturing such a composite panel remains simple. Furthermore, the penetration of the face sheet material into some holes of the closing film can happen naturally thanks to capillarity without the need of adapting the molding step of the face sheet.
  • this composite panel is light, strong, and easy to manufacture.
  • the cells of the core are open columnar cells extending along a common cell direction. Such columnar cells bring a high stiffness in their cell direction while having a very low density. In addition, the present invention is all the more useful for such cores. [0016] In some embodiments, the common cell direction is normal to the first face of the core. This brings an increased stiffness.
  • all the cells of the core are identical.
  • the cells of the core are organized according to a honeycomb structure. Such a structure brings a very high stiffness and reliability.
  • the cells could have square or triangle sections, for example.
  • the core is a continuous foam.
  • the diameter of the cells is comprised between 5 and 50 mm.
  • the use of "diameter" is not intended to be restricted to circular shapes: indeed, more generally, the diameter is defined to be the largest distance that can be formed between two opposite parallel lines tangent to the boundary of the considered shape, i.e. the cell section in the present case.
  • the core comprises at least one of a metal, a polymer or a composite material. More specifically, the core can be completely made in one of these materials.
  • the first face of the core is flat.
  • both main faces of the core are flat.
  • the closing film comprises at least one of a polymer, a metal or a composite material. More specifically, the closing film can be completely made in one of these materials.
  • the face sheet comprises, and is preferably made in, a polymer, preferably a resin.
  • the closing film comprises at least three holes, arranged in a non-linear configuration. This configuration is enough to ensure a proper adhesion of the face sheet in the whole area located between these three holes.
  • the closing film has a hole density of at least 0.01 hole/cm 2 , preferably at least 0.1 hole/cm 2 , still preferably at least 1 hole/cm 2 .
  • At least 10%, preferably at least 30%, still preferably at least 90%, of the cells corresponds with a hole of the closing film.
  • some cells correspond with several holes of the closing film.
  • the hole density of the closing film is variable in some areas of the closing film. Accordingly, it is possible to tailor the adhesion of the face sheet if an increased bending stiffness or impact strength is required in specific locations.
  • the holes of the closing film are arranged according to a periodic pattern. This leads to steady adhesion of the face sheet all over the surface of the closing film.
  • the holes could be arranged according to no periodic pattern, possibly randomly.
  • the holes of the closing film are arranged according to a uniform pattern.
  • the diameter of at least 50%, preferably at least 90%, of the holes is comprised between 0.2 and 2 mm.
  • the inventors have determined that this range is a good compromise with a diameter large enough to allow the penetration of material while remaining small enough to prevent too large a quantity of material from penetrating the holes.
  • the diameter of the holes can be tuned according to the viscosity of the material of the face sheet during the molding step.
  • the diameter of at least one penetrating portion is greater than the diameter of the corresponding hole penetrated by said penetrating portion. Preferably, this is the case for at least 50% of the penetrating portions, still preferably for 90% of them. Accordingly, the penetrating portions are locked beyond the holes so that the face sheet cannot be removed without breaking the penetrating portions and/or the closing film, which increases the adhesion of the face sheet to the closing film.
  • the core comprises two opposite main faces, the first and a second face, and the cells of the core are open to the first and the second faces.
  • a second perforated closing film is bonded to the second face of the core.
  • a face sheet is bonded to each perforated closing film. Accordingly, a sandwich composite panel can be formed, which highly increases the bending stiffness of the panel.
  • the present disclosure also relates to a method for manufacturing a composite panel, comprising the steps of: providing a core having cells open to at least a first face of the core, bonding a closing film on the first face of the core, perforating the closing film so as to create holes in the closing film, coating the perforated closing film with a fluid surface material such that at least a portion of the fluid surface material penetrates at least some holes of the perforated closing film, and solidifying the fluid surface material such that a face sheet is formed interlocked on the perforated closing film.
  • the perforating step takes place after the bonding step.
  • the perforating step could take place before the bonding step.
  • the holes are created thanks to a reciprocating needle.
  • the holes are created thanks to a plate equipped with several needles.
  • the holes are created thanks to a rotating cylinder equipped with several needles.
  • the coating step is carried out in a mold.
  • the coating step can be carried out through a resin transfer molding (TRM), a wet compression molding, or a vacuum infusion, for example.
  • TRM resin transfer molding
  • wet compression molding a wet compression molding
  • vacuum infusion a vacuum infusion
  • FIG 1-5 illustrate succeeding steps of an exemplary method for manufacturing a composite panel according to the disclosure.
  • FIG 6 is an enlarged view of the area VI of FIG 4.
  • FIG 7A-C illustrate, in section views, different exemplary perforating steps.
  • FIG 1 illustrates a core 10 in perspective view.
  • This core 10 is a honeycomb core composed of identical hexagonal columnar cells 11, partitioned by peripheral walls 12, extending next to each other along a common cell direction.
  • the core 10 comprises two opposite main faces 13, flat and orthogonal to the cell direction; each cell 11 is open to both main faces 13.
  • the core 10 is made in metal, such as aluminum, has a thickness of 6 mm and a cell diameter of 4 mm.
  • the core 10 could be made in polymer, such as Polypropylene.
  • FIG 2 illustrates a step of bonding a closing film 20 on each main face 13 of the core 10.
  • the closing films 20, preferably identical, are bonded all over the main faces 13 so as to close every cell 11 of the core 10 at both ends.
  • each closing film 20 can be bonded on the core 10 thanks to any adapted technique, and notably thermal welding.
  • each closing film 20 is a polymer film, for example in polypropylene, and has a thickness of 0.05 mm.
  • FIG 3 illustrates a step of perforating the closing films 20: holes 21 are perforated in each closing film 20.
  • each hole 21 is perforated facing each cell 11, substantially in the center of the cell section; each hole 21 has a diameter of about 0.64 mm.
  • holes 21 can be perforated thanks to different techniques.
  • the core 10 closed by the closing films 20 can be driven in translation while a reciprocating needle 91 perforates the closing film 20 on a regular basis as a sewing machine.
  • the speeds of the core translation and of the needle movement can be tuned so as to set the desired hole distribution over the whole closing film 20.
  • the core 10 closed by the closing films 20 is driven in translation while a plate 92 equipped with several needles 92a reciprocates and creates several holes 21 at a time.
  • the plate 92 can have a single row of needles 92a or a whole two-dimensional array of needles 92a.
  • FIG 7C the core 10 closed by the closing films 20 is driven in translation while a cylinder 93 equipped with several needles 93a is rotated at the edge of the closing film 20 so as to continuously perforate the closing film 20 from one end to the opposite end.
  • the cylinder 93 can extend over the whole width of the core 10 and be equipped with several rows of needles 93a, potentially offset from one row to the other.
  • FIG 4 illustrates a step of coating the closing films 20 with a fluid surface material 30'.
  • This coating step can be carried out thanks to any adapted technique.
  • the core 10 closed by the closing films 20 can be introduced in a mold, leaving a gap between each closing film 20 and the walls of the mold, and the fluid surface material 30' can be injected in the mold so as to fill said gaps.
  • the fluid surface material 30' is fluid enough to penetrate the holes 21 but viscous enough to stick together so that the droplets 3 remain attached to the surface material lying on the outer surface of the closing film 21 without substantially filling the cells 11.
  • the coating step is continued until the droplets 3 reach a diameter greater than the diameter of the holes 21 but still lesser than twice the diameter of the holes 21.
  • the surface material is a polymer resin, such as Epoxy, having a viscosity of 30 Pa.s at the temperature of the coating step (i.e. about 120°C).
  • the surface material 30' is solidified during a solidifying step.
  • the mold is heated in an oven at 120 °C during 1-2 min so as to cure the resin.
  • the sandwich composite panel 1 of FIG 5 is obtained.
  • the panel 1 therefore comprises a central core 10, having a honeycomb structure, closing films 20 bonded to both main faces 13 of the core 10, and face sheets 30 bonded to each closing film 20, thus flanking both main faces 13 of the core 10.
  • the face sheets 30 correspond to the solidified layer of surface material 30': once solidified, the droplets 3 form solid penetrating portions 31 of the face sheets 30 which penetrate the cells 11 of the core 10 through the holes 21 of the closing film 20.
  • the face sheets 30 are formed by a solidified resin only; however, in other examples, the face sheets 30 could also comprise a reinforcement component, such as a fiber preform, embedded in a polymer matrix. In such a case, the penetrating portions are formed by droplets 3 of solidified matrix.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un panneau composite comprenant une âme (10), ayant des cellules (11) ouvert sur au moins une première face (13) de l'âme (10), un film de fermeture (20) lié à la première face (13) de l'âme (10) et une feuille de face (30) liée au film de fermeture (20). Le film de fermeture (20) comprend des trous (21) et des portions pénétrantes (31) de la feuille de face (30) pénètrent au moins partiellement dans au moins certains trous (21) du film de fermeture (20) pour verrouiller mutuellement la feuille de face (30) avec le film de fermeture (20).
PCT/EP2019/079290 2019-10-25 2019-10-25 Panneau composite et son procédé de fabrication WO2021078400A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/079290 WO2021078400A1 (fr) 2019-10-25 2019-10-25 Panneau composite et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/079290 WO2021078400A1 (fr) 2019-10-25 2019-10-25 Panneau composite et son procédé de fabrication

Publications (1)

Publication Number Publication Date
WO2021078400A1 true WO2021078400A1 (fr) 2021-04-29

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386441B (de) * 1984-07-16 1988-08-25 Kunex Tuerenwerk Schalldaemmendes, flaechiges bauelement
US20040200571A1 (en) * 1998-12-02 2004-10-14 Eikatsu Yamaguchi Methods of forming honeycomb sandwich composite panels
US20080160860A1 (en) * 2004-03-02 2008-07-03 Toray Industries, Inc. Epoxy Resin Composition for Fiber-Reinforced Composite Material, Prepreg, and Fiber-Reinforced Composite Material
DE102009020720A1 (de) * 2009-05-11 2010-11-25 Sauerländer Spanplatten GmbH & Co. KG Schalldämmendes Bauelement
GB2477091A (en) * 2010-01-20 2011-07-27 Hexcel Composites Ltd Structureal laminate comprising face sheets, core and open-structured sheet
US20170066008A9 (en) * 2008-08-20 2017-03-09 Jon H. Brasher Coating Reinforcement Application and Method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386441B (de) * 1984-07-16 1988-08-25 Kunex Tuerenwerk Schalldaemmendes, flaechiges bauelement
US20040200571A1 (en) * 1998-12-02 2004-10-14 Eikatsu Yamaguchi Methods of forming honeycomb sandwich composite panels
US20080160860A1 (en) * 2004-03-02 2008-07-03 Toray Industries, Inc. Epoxy Resin Composition for Fiber-Reinforced Composite Material, Prepreg, and Fiber-Reinforced Composite Material
US20170066008A9 (en) * 2008-08-20 2017-03-09 Jon H. Brasher Coating Reinforcement Application and Method
DE102009020720A1 (de) * 2009-05-11 2010-11-25 Sauerländer Spanplatten GmbH & Co. KG Schalldämmendes Bauelement
GB2477091A (en) * 2010-01-20 2011-07-27 Hexcel Composites Ltd Structureal laminate comprising face sheets, core and open-structured sheet

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