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FR2470679A1 - Self supporting structural panel - with open celled carrier layer enclosed in fibre mats with resin binder - Google Patents

Self supporting structural panel - with open celled carrier layer enclosed in fibre mats with resin binder Download PDF

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Publication number
FR2470679A1
FR2470679A1 FR7929565A FR7929565A FR2470679A1 FR 2470679 A1 FR2470679 A1 FR 2470679A1 FR 7929565 A FR7929565 A FR 7929565A FR 7929565 A FR7929565 A FR 7929565A FR 2470679 A1 FR2470679 A1 FR 2470679A1
Authority
FR
France
Prior art keywords
complex
sheet
soundproofing
partitions
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7929565A
Other languages
French (fr)
Other versions
FR2470679B1 (en
Inventor
Robert Vignal
Guy Ferrand
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.)
Matec Holding AG
Original Assignee
Matec Holding AG
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 Matec Holding AG filed Critical Matec Holding AG
Priority to FR7929565A priority Critical patent/FR2470679A1/en
Priority to DE19803035449 priority patent/DE3035449A1/en
Priority to JP16400180A priority patent/JPS5680450A/en
Priority to IT26235/80A priority patent/IT1134460B/en
Publication of FR2470679A1 publication Critical patent/FR2470679A1/en
Application granted granted Critical
Publication of FR2470679B1 publication Critical patent/FR2470679B1/fr
Granted legal-status Critical Current

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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
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D24/00—Producing articles with hollow walls
    • B29D24/002—Producing articles with hollow walls formed with structures, e.g. cores placed between two plates or sheets, e.g. partially filled
    • B29D24/005—Producing articles with hollow walls formed with structures, e.g. cores placed between two plates or sheets, e.g. partially filled the structure having joined ribs, e.g. honeycomb
    • 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
    • B32B27/065—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 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
    • 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
    • B32B27/10—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 paper or cardboard
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • 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
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0815—Acoustic or thermal insulation of passenger compartments
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • 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
    • 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
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B32B2317/122—Kraft paper
    • 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
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • 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
    • B32B2375/00—Polyureas; Polyurethanes
    • 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
    • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Laminated Bodies (AREA)
  • Body Structure For Vehicles (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

A self-supporting planar structural element, consists of a cardboard layer which on expansion forms a honeycomb pattern, and is enclosed between air permeable layers of a resin-impregnated chopped strand or needle loom mat. Along the rim or on places where a lamp is to be mounted, the three layers are tightly compressed. An internal decorative layer (a PCV foil lined with open-celled polyurethane foam) completes the element. This creates a self-supporting element of low unit wt. which has good acoustic properties. Prod. is used in pallet base, door panels, walls for prefabricated buildings and packaging material or as ceiling linings of motor car bodies.

Description

Perfectionnements aux complexes destinés à l'insono
risation et aux panneaux équipés de tels complexes.Improvements to complexes intended for insono
and panels fitted with such complexes.

L'invention est relative aux complexes destinés à l'insonorisation, notamment à 1 insonorisation des habitacles de véhicules par apposition de ces complexes contre des éléments de carrosserie de ces véhicules, tels que les pavillons, les panneaux de portes ou les capots de moteurs. The invention relates to complexes intended for soundproofing, in particular to soundproofing the passenger compartments of vehicles by affixing these complexes against bodywork elements of these vehicles, such as headlamps, door panels or engine cowls.

Elle vise également les panneaux, et notamment les éléments de carrosserie, qui sont équipés de tels complexes. It also relates to the panels, and in particular the bodywork elements, which are equipped with such complexes.

On connait déjà des complexes du genre en question composés de plusieurs couches superposées dont l'une au moins est formée par un feutre. We already know complexes of the kind in question composed of several superimposed layers, at least one of which is formed by a felt.

L'invention a pour but, surtout, d'améliorer ces complexes en les rendant plys légers, plus efficaces en ce qui concerne l'absorption des sons, notamment de ceux à haute fréquence et plus résistants mécaniquement en ceisens que, d'une part, ils présentent un degré suffisant d'autoportance pour pouvoir etre facilement mis en place contre des éléments de tôle préformés et que, d'autre part, leur rigidité contribue d'une manière substantielle à la rigidité desdits éléments de tôle, ces qualités de résistance et de rigidité n'empechant pas les complexes considérés de subir par prémoulage des déformations inélastiques en flexion et en compression en vue précisément de leur application jointive contre les éléments de tôle cidessus et/ou de la formation locale de zones amincies dans ces complexes. The object of the invention is, above all, to improve these complexes by making them lighter, more efficient with regard to the absorption of sounds, in particular those at high frequency and more mechanically resistant in ceisens than, on the one hand , they have a sufficient degree of self-supporting to be able to be easily placed against preformed sheet metal elements and, on the other hand, their rigidity contributes substantially to the rigidity of said sheet metal elements, these qualities of resistance and of rigidity which does not prevent the complexes considered from undergoing, by pre-molding, inelastic deformations in bending and in compression with a view precisely to their joint application against the sheet metal elements above and / or to the local formation of thinned zones in these complexes.

Les complexes du genre en question selon l'invention sont caractérisés en ce qu'ils comprennent au moins les quatre couches suivantes, superposées jointivement et adhérées les unes contre les autres de proche en proche : une feuille mince résistant à la traction, notamment en carton ; une structure en nid d'abeilles réalisée en carton ou matériau analogue, structure constituée par des cloisons s'étendant perpendiculairement aux surfaces moyennes des différentes couches superposées; une nappe de feutre présentant une faible masse volumique ; et une couche d'habillage microporeuse offrant une faible résistance au passage de l'air. The complexes of the kind in question according to the invention are characterized in that they comprise at least the following four layers, overlapped contiguously and adhered against each other step by step: a thin sheet resistant to traction, in particular made of cardboard ; a honeycomb structure made of cardboard or similar material, structure consisting of partitions extending perpendicular to the average surfaces of the various superimposed layers; a sheet of felt having a low density; and a layer of microporous covering offering a low resistance to the passage of air.

Dans des modes de réalisation préférés, on a recours en outre à l'une et/ou à l'autre des dispositions suivantes
- le complexe comprend une cinquième couche constituée par une seconde nappe de feutre interposée entre la feuille résistant à la traction et la structure en nid d'abeilles,
- la hauteur des cloisons constituant la structure en nid d'abeilles, comptée selon la direction perpendiculaire aux surfaces moyennes des couches superposées, est de l'ordre de 3 cm, alors que les largeur et longueur des sections droites des alvéoles formés par ces cloisons sont de l'ordre respectivement de 2 et de 3 cm,
- la feuille résistant à la traction est collée contre un panneau préformé en tôle, de manière à épouser jointivement la forme de ce panneau,
- avant de procéder au collage selon l'alinéa précédent, le complexe est mis en forme par moulage de façon à pouvoir s'adapter contre le panneau sans déformation ultérieure,
- le panneau constitue un pavillon de véhicule,
- dans un complexe selon l'alinéa précédent, équipant un pavillon, des réductions d'épaisseur sont prévues aux endroits destinés à etre disposés au-dessus des te tes des passagers du véhicule comprenant le pavillon considéré,
- deux complexes multicouches du type ci-dessus sont accolés l'un contre l'autre avec éventuellement interposition d'au moins une couche supplémentaire ou mise en commun de l'une des deux couches extérieures de ces deux complexes.In preferred embodiments, use is also made of one and / or the other of the following arrangements.
the complex comprises a fifth layer constituted by a second layer of felt interposed between the tensile-resistant sheet and the honeycomb structure,
- The height of the partitions constituting the honeycomb structure, counted in the direction perpendicular to the average surfaces of the superimposed layers, is of the order of 3 cm, while the width and length of the straight sections of the cells formed by these partitions are of the order of 2 and 3 cm respectively,
- the tensile-resistant sheet is glued against a preformed sheet metal panel, so as to join the shape of this panel together,
before bonding according to the preceding paragraph, the complex is shaped by molding so as to be able to adapt against the panel without subsequent deformation,
- the panel constitutes a vehicle roof,
- in a complex according to the preceding paragraph, equipping a pavilion, thickness reductions are provided for at the places intended to be placed above the heads of the passengers of the vehicle comprising the pavilion considered,
- Two multilayer complexes of the above type are joined against each other with possibly interposition of at least one additional layer or pooling of one of the two outer layers of these two complexes.

L'invention comprend, mises à part ces dispositions principales, certaines autres dispositions qui s'utilisent de préférence en me me temps et dont il sera plus explicitement question ci-après. The invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.

Dans ce qui suit l'on va décrire un mode de réalisation préféré de l'invention en se référant au dessin ci-annexé d'une manière bien entendu non limitative.  In what follows, a preferred embodiment of the invention will be described with reference to the attached drawing, of course in a non-limiting manner.

Les figures 1 et 2, de ce dessin, montrent respectivement en coupe transversale (c'est-à-dire perpendiculairement aux plans moyens des différentes couches superposées) selon I-I, figure 2, et en coupe longitudinale selon II-II, figure 1, un morceau d'un complexe d'insonorisation établi selon l'invention. FIGS. 1 and 2, of this drawing, show respectively in cross section (that is to say perpendicular to the mean planes of the different superimposed layers) according to II, FIG. 2, and in longitudinal section according to II-II, FIG. 1, a piece of a soundproofing complex established according to the invention.

La figure 3 montre à plus petite échelle un plus grand morceau d'un tel complexe, collé contre un élément préformé de tôle. Figure 3 shows on a smaller scale a larger piece of such a complex, glued against a preformed sheet member.

La figure 4 montre très schématiquement un véhicule dont le pavillon est équipé d'un tel complexe. Figure 4 shows very schematically a vehicle whose roof is equipped with such a complex.

Le complexe d'insonorisation considéré comprend essentiellement quatre couches superposées, savoir
- une première couche constituée d'une feuille continue 1 peu extensible, c'est-à-dire présentant une certaine résistance à la traction,
- une seconde couche constituée par une structure 2 en nid d'abeilles dont les cloisons 3 s'étendent perpendiculairement à la surface moyenne de cette couche,
- une troisième couche constituée par une nappe de feutre 4 de faible masse volumique,
- et une quatrième couche constituée par une feuille microporeuse 5 présentant une faible résistance au passage de l'air.The soundproofing complex under consideration essentially comprises four superimposed layers, namely
a first layer consisting of a continuous sheet 1 that is not very stretchy, that is to say having a certain tensile strength,
a second layer constituted by a honeycomb structure 2, the partitions 3 of which extend perpendicular to the average surface of this layer,
a third layer consisting of a felt sheet 4 of low density,
- And a fourth layer consisting of a microporous sheet 5 having a low resistance to the passage of air.

La feuille 1 peut être constituée par du papier mais est de préférence constituée par un carton de faible épaisseur, ce matériau présentant l'avantage de résister non seulement à la traction, mais aussi, dans une certaine mesure, à la compression. The sheet 1 can be made of paper but is preferably made of a thin cardboard, this material having the advantage of not only withstanding traction, but also, to a certain extent, with compression.

La structure 2 est également Constituée de préférence par du carton, ce matériau pouvant etre utilisé tel quel ou etre imprégné d'une résine de renforcement telle qu'une résine formophénolée (bakélite). Structure 2 is also preferably made of cardboard, this material can be used as it is or be impregnated with a reinforcing resin such as a formophenolated resin (bakelite).

La nappe de feutre 4 est constituée de toute manière désirable, notamment de l'une de celles qui ont été décrites dans le brevet France nO 2 265 147 de la demanderesse, c'est-à-dire à l'aide de fibres naturelles, artificielles et/ou synthétiques (coton, éventuellement coton mélangé avec de la laine, fibres acryliques, méthacryliques, en polyuréthanei polyoléfine, cellulose modifiée, rayonne, polyester, polyamide, PVC ...), ces différentes fibres étant liées entre elles à l'aide d'une résine thermodurcissable en poudre,ou en solution, ou encore en disper sion, ou à l'aide d'autres fibres thermofusibles dispersées au sein des susdites fibres. The felt ply 4 is made up in any desirable manner, in particular of one of those which have been described in French patent No. 2,265,147 of the applicant, that is to say using natural fibers, artificial and / or synthetic (cotton, possibly cotton mixed with wool, acrylic, methacrylic fibers, polyurethane polyolefin, modified cellulose, rayon, polyester, polyamide, PVC ...), these different fibers being linked to each other using a thermosetting resin in powder, or in solution, or even in dispersion, or with the aid of other hot-melt fibers dispersed within the abovementioned fibers.

La liaison en question est notamment assurée en imprégnant la nappe de fibres par le liant, puis en polymérisant au moins en partie ce liant par passage de la nappe ainsi imprégnée dans un four approprié. The connection in question is ensured in particular by impregnating the sheet of fibers with the binder, then by at least partially polymerizing this binder by passing the sheet thus impregnated in a suitable oven.

Le grammage de la nappe 4 en question est de préférence
2 compris entre 500 et 1500 g/m2. The grammage of the ply 4 in question is preferably
2 between 500 and 1500 g / m2.

La feuille de garnissage 5 est avantageusement constituée, elle aussi, de l'une des manières qui ont été décrites dans le brevet ci-dessus, c'est-à-dire notamment par un mélange de fibres synthétiques, par exemple en polyester, et d'une résine thermodurcissable, par exemple phénolique, l'ensemble étant encore polymérisé, au moins en partie, par son passage dans un four
Le grammage de cette feuille 5 est avantageusement compris entre 50 et 300 g/m2.The lining sheet 5 is advantageously also made up in one of the ways which have been described in the above patent, that is to say in particular by a mixture of synthetic fibers, for example polyester, and a thermosetting resin, for example phenolic, the whole being still polymerized, at least in part, by its passage through an oven
The grammage of this sheet 5 is advantageously between 50 and 300 g / m2.

Les épaisseurs respectives des différentes couches sont de préférence comprises
- entre 0,3 et 1 mm pour la feuille 1 en carton ou analogue,
- entre 10 et 50 mm pour la structure 2 en nid d'abeilles,
- entre 5 et 10 mm pour la nappe de feutre 4 dans les zones non comprimées de cette nappe, c'est-à-dire non disposées en regard des tranches des cloisons 3, l'épaisseur de ladite nappe dans les zones écrasées par lesdites tranches pouvant etre réduite à 1 ou 2 mm,
- et enfin entre 0,5 et 1,5 mm pour la feuille microporeuse 5.The respective thicknesses of the different layers are preferably included
- between 0.3 and 1 mm for sheet 1 of cardboard or the like,
- between 10 and 50 mm for the honeycomb structure 2,
- between 5 and 10 mm for the felt ply 4 in the uncompressed areas of this ply, that is to say not arranged facing the edges of the partitions 3, the thickness of said ply in the areas crushed by said slices which can be reduced to 1 or 2 mm,
- and finally between 0.5 and 1.5 mm for the microporous sheet 5.

Le carton constitutif de la structure en nid d'abeilles est lui-meme de préférence choisi d'une épaisseur relativement faible, par exemple de l'ordre de 0,1 mm. The cardboard constituting the honeycomb structure is itself preferably chosen with a relatively small thickness, for example of the order of 0.1 mm.

Les alvéoles prismatiques à.base hexagonale ou "en nid d'abeilles" composant cette structure sont de préférence formés par collage mutuel de bandes de carton de largeur constante déformées selon des ondulations brisées, comme bien visible sur la figure 2, le collage mutuel de ces bandes étant assuré le long de pans plans longitudinaux 6 de celles-ci correspondant respectivement aux fonds et aux sommets des ondulations, pans qui sont raccordés entre eux par d'autres pans plans 7 inclinés alternativement dans deux sens opposés. The prismatic cells with a hexagonal or "honeycomb" base making up this structure are preferably formed by mutual bonding of strips of cardboard of constant width deformed according to broken corrugations, as clearly visible in FIG. 2, the mutual bonding of these strips being provided along longitudinal flat sections 6 thereof corresponding respectively to the bottoms and tops of the corrugations, sections which are connected together by other flat sections 7 inclined alternately in two opposite directions.

La section droite des alvéoles en nid d'abeilles délimi tés par les cloisons 3 formées par ces pans 6 et 7 peut être relativement grande et présenter notamment une largeur 1 de l'ordre de 2 cm et une longueur L de l'ordre de 3 cm. The cross section of the honeycomb cells delimited by the partitions 3 formed by these panels 6 and 7 can be relatively large and in particular have a width 1 of the order of 2 cm and a length L of the order of 3 cm.

Dans un mode de réalisation préféré, on prévoit en outre une cinquième couche constituée par une nappe de feutre 8 interposée entre la feuille peu extensible 1 et la structure en nid d'abeilles 2 : cette nappe 8 est avantageusement identique à la nappe 4. In a preferred embodiment, a fifth layer is also provided, consisting of a felt ply 8 interposed between the slightly stretchy sheet 1 and the honeycomb structure 2: this ply 8 is advantageously identical to the ply 4.

Le complexe composite ainsi défini est avantageusement accolé contre un élément de cloison rigide tel qu'une tôle 9, notamment par collage et/ou agrafage. The composite complex thus defined is advantageously placed against a rigid partition element such as a sheet 9, in particular by gluing and / or stapling.

Lorsque la surface de contact entre le complexe et un tel élément de cloison rigide 9 n'est pas plane (voir figure 3), il est particulièrement avantageux de mettre préalablement en forme ce complexe par moulage de manière qu'il puisse ensuite épouser jointivement ledit élément par sa simple pose contre cet élément sans autre déformation au cours de la pose elle-même. When the contact surface between the complex and such a rigid partition element 9 is not planar (see FIG. 3), it is particularly advantageous to shape this complex beforehand by molding so that it can then join said joint element by its simple laying against this element without further deformation during the laying itself.

Un tel moulage est notamment assuré par compression à chaud du complexe dans une presse composée d'un moule et d'un contre-moule ou couvercle appliqué sous pression contre le moule, par exemple en présence de vapeur surchauffée, vapeur introduite dans l'enceinte de moulage à l'aidewde buses d'injection appropriées. Such molding is in particular ensured by hot compression of the complex in a press composed of a mold and a counter mold or cover applied under pressure against the mold, for example in the presence of superheated steam, steam introduced into the enclosure. molding using suitable injection nozzles.

Cette mise en forme préalable du complexe se traduit par des déformations inélastiques de celui-ci en flexion et/ou en compression transversale, entrainant la création irréversible de plis ou cassures 10 dans les cloisons 3 : après avoir subi la mise en forme en question, le complexe obtenu, pratiquement autoportant, conserve sa forme. This prior shaping of the complex results in inelastic deformations of the latter in bending and / or in transverse compression, causing the irreversible creation of folds or breaks 10 in the partitions 3: after having undergone the shaping in question, the complex obtained, practically self-supporting, retains its shape.

Comme montré sur la figure 4, la tôle 9 incurvée en question est avantageusement un pavillon de voiture automobile et des zones creuses ou cuvettes 11 sont ménagées dans le complexe considéré aux emplacements disposés au-dessus des tetes 12 des passagers, de façon à augmenter le volume intérieur de l'habitacle en ces emplacements et/ou de réduire la hauteur totale du véhicule : la formation de ces cuvettes est obtenue par des compressions locales irréversibles du complexe aux emplacements correspondants, notamment au cours d'une opération de moula ge ou matriçage antérieure à la mise en place du genre de celles décrites ci-dessus. As shown in FIG. 4, the curved sheet 9 in question is advantageously a motor vehicle roof and hollow zones or bowls 11 are provided in the complex in question at the locations arranged above the heads 12 of the passengers, so as to increase the interior volume of the passenger compartment at these locations and / or to reduce the total height of the vehicle: the formation of these bowls is obtained by local irreversible compressions of the complex at the corresponding locations, in particular during a molding or forging operation prior to the establishment of the kind of those described above.

I1 est à noter qu'une telle opération de moulage ou matri çage préalable peut être utilisée à d'autres fins que les mises en forme ci-dessus décrites, notamment en vue d'imprimer dans le complexe des rainures de raidissement. It should be noted that such a prior molding or stamping operation can be used for purposes other than the shapings described above, in particular with a view to printing in the complex stiffening grooves.

En suite de quoi, et quel que soit le mode de réalisation adopté, on dispose finalement d'un complexe composite d'insonorisation dont la constitution et la mise en oeuvre résultent suffisamment de ce qui précède. As a result of this, and whatever the embodiment adopted, there is finally a composite soundproofing complex whose constitution and implementation result sufficiently from the above.

Ce complexe présente simultanément un certain nombre de qualités remarquables et en particulier les suivantes
- il est particulièrement léger : c'est ainsi que le poids d'une pièce constituée en un tel complexe et prévue pour insonoriser le pavillon d'une berline de tourisme peut être de l'ordre de 2 kg seulement, alors qu'avec les réalisations antérieurement connues assurant une absorption acoustique comparable, les poids correspondants sont généralement supérieurs à 3 et même à 4 kg,
- son efficacité d'absorption acoustique est excellente même pour les fréquences relativement élevées : c'est ainsi que le sandwich selon l'invention présente un coefficient d'absorption acoustique moyen légèrement supérieur à celui d'un feutre de même épaisseur et de même poids spécifique moyen pour les fréquences basses (100-500 Hz) et élevées (1500-2000 Hz) et pratiquement identique à celui dudit feutre pour les fréquences moyennes (500-1500 Hz),
- le complexe en question présente une grande rigidité mécanique, son module d'élasticité (ou module d'Young) étant par exemple de l'ordre de 80 kg/cm2 pour une épaisseur totale de l'ordre de 40 mm et un poids spécifique de 2,4 kg/m2, au lieu de 0,01 kg/cm2 pour un feutre de même épaisseur et de même poids spécifique : par suite, après collage d'un tel complexe contre une tôle, la rigidité de l'ensemble complexe-tôle ainsi obtenu, et en particulier sa résistance à la flexion, au flambage et aux vibrations, sont nettement supérieures à celles de la tôle seule, à tel point que l'épaisseur et le poids de cette tôle peuvent être réduits pour une résistance donnée de celle-ci,
- le complexe en question est pratiquement autoportant, ce qui facilite considérablement sa mise en place sur une tôle ou autre cloison rigide, plane ou non, et permet même de l'utiliser directement comme un panneau d'insonorisation sans support complémentaire,
- ledit complexe présente une grande capacité d'absorption des chocs localisés, puisque ces chocs peuvent se traduire par la déformation inélastique d'un petit nombre d'alvéoles de la structure en nid d'abeilles sans déformation des autres alvéoles de cette structure.This complex simultaneously presents a certain number of remarkable qualities and in particular the following
- It is particularly light: this is how the weight of a room made up of such a complex and designed to soundproof the roof of a passenger sedan can be around 2 kg only, whereas with the previously known embodiments ensuring comparable sound absorption, the corresponding weights are generally greater than 3 and even 4 kg,
- its sound absorption efficiency is excellent even at relatively high frequencies: this is how the sandwich according to the invention has an average sound absorption coefficient slightly higher than that of a felt of the same thickness and the same weight specific medium for low (100-500 Hz) and high frequencies (1500-2000 Hz) and practically identical to that of said felt for medium frequencies (500-1500 Hz),
- The complex in question has great mechanical rigidity, its elastic modulus (or Young's modulus) being for example of the order of 80 kg / cm2 for a total thickness of the order of 40 mm and a specific weight 2.4 kg / m2, instead of 0.01 kg / cm2 for a felt of the same thickness and the same specific weight: as a result, after gluing such a complex against a sheet, the rigidity of the complex as a whole sheet metal thus obtained, and in particular its resistance to bending, to buckling and to vibrations, are clearly greater than those of sheet metal alone, so much so that the thickness and the weight of this sheet metal can be reduced for a given resistance of it,
the complex in question is practically self-supporting, which considerably facilitates its installation on a sheet metal or other rigid partition, flat or not, and even allows it to be used directly as a soundproofing panel without additional support,
- Said complex has a high capacity for absorbing localized shocks, since these shocks can result in the inelastic deformation of a small number of cells of the honeycomb structure without deformation of the other cells of this structure.

Comme il va de soi, et comme il résulte d'ailleurs déjà de ce qui précède, l'invention ne se limite nullement à ceux de ses modes d'application et de réalisation qui ont été plus spécialement envisagés ; elle en embrasse, au contraire, toutes les variantes. As goes without saying, and as it already follows from the above, the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; on the contrary, it embraces all its variants.

En particulier, on pourrait envisager pour certaines applications de superposer deux complexes du genre de ceux décrits ci-dessus, avec éventuellement interposition d'au moins une cou- - che intercalaire, ou encore mise en commun de l'une des couches extérieures de ces complexes : c'est ainsi que la feuille résistant à la traction pourrait constituer le couche centrale d'un complexe composite autoportant délimité sur ses deux faces extérieures par deux couches microporeuses. In particular, it could be envisaged for certain applications to superimpose two complexes of the kind described above, possibly with the interposition of at least one intermediate layer, or even the pooling of one of the outer layers of these complex: this is how the tensile-resistant sheet could constitute the central layer of a self-supporting composite complex delimited on its two external faces by two microporous layers.

Claims (9)

REVENDICATIONS 1. Complexe destiné à l'insonorisation, caractérisé en ce qu'il comprend au moins les quatre couches suivantes, superposées jointivement et adhérées les unes contre les autres de proche en proche : une feuille mince (1) résistant à la traction' notamment en carton ; une structure en nid d'abeilles (2) réalisée en carton ou matériau analogue, structure constituée par des cloisons (3) s'étendant perpendiculairement aux surfaces moyennes des différentes couches superposées ; une nappe de feutre (4) présentant une faible masse volumique ; et une couche d'habillage microporeuse (5) offrant une faible résistance au passage de l'air. 1. Complex intended for soundproofing, characterized in that it comprises at least the following four layers, overlapped contiguously and adhered against each other step by step: a thin sheet (1) resistant to traction 'in particular by cardboard; a honeycomb structure (2) made of cardboard or similar material, structure constituted by partitions (3) extending perpendicular to the average surfaces of the various superimposed layers; a felt sheet (4) having a low density; and a microporous covering layer (5) offering a low resistance to the passage of air. 2. Complexe d'insonorisation selon la revendication 1, caractérisé en ce qu'il comprend une cinquième couche constituée par une seconde nappe de feutre (8) interposée entre la feuille résistant à la traction et la structure en nid d'abeilles. 2. Soundproofing complex according to claim 1, characterized in that it comprises a fifth layer consisting of a second felt sheet (8) interposed between the tensile-resistant sheet and the honeycomb structure. 3. Complexe d'insonorisation selon l'une quelconque des revendications 1 et 2, caractérisé en ce que la hauteur des cloisons (3) constituant la structure en nid d'abeilles (1), comptée selon la direction perpendiculaire aux surfaces moyennes des couches superposées, est de l'ordre de 3 cm, alors que les hauteur et longueur des sections droites des alvéoles formés par ces cloisons sont de l'ordre respectivement de 2 et de 3 cm. 3. Soundproofing complex according to any one of claims 1 and 2, characterized in that the height of the partitions (3) constituting the honeycomb structure (1), counted in the direction perpendicular to the average surfaces of the layers superimposed, is of the order of 3 cm, while the height and length of the straight sections of the cells formed by these partitions are of the order of 2 and 3 cm respectively. 4. Complexe d'insonorisation selon l'une quelconque des précédentes revendications, caractérisé en ce qu il est mis en forme par moulage, au prix de déformations irréversibles (10) de certaines de ses cloisons (3).  4. Soundproofing complex according to any one of the preceding claims, characterized in that it is shaped by molding, at the cost of irreversible deformations (10) of some of its partitions (3). 5. Complexe d'insonorisation, caractérisé en ce qu'il est composé de deux complexes multicouches selon l'une quelconque des précédentes revendications, accolés l'un contre l'autre. 5. Soundproofing complex, characterized in that it is composed of two multilayer complexes according to any one of the preceding claims, joined against one another. 6. Complexe selon la revendication 5, caractérisé en ce que les deux complexes sont accolés avec mise en commun de leur feuille résistant à la traction. 6. Complex according to claim 5, characterized in that the two complexes are joined with the pooling of their tensile-resistant sheet. 7. Panneau insonorisé et éventuellement préformé, caractérisé en ce que la feuille résistant à la traction d'un complexe selon l'une quelconque des revendications 1 à 4 est rapportée contre ce panneau de manière à en épouser jointivement la forme. 7. Soundproofed and optionally preformed panel, characterized in that the tensile-resistant sheet of a complex according to any one of claims 1 to 4 is attached against this panel so as to conform to its shape. 8. Panneau insonorisé et préformé selon la revendication 7, caractérisé en ce qu'il constitue un pavillon de véhicule.  8. Soundproof and preformed panel according to claim 7, characterized in that it constitutes a vehicle roof. 9. Pavillon selon la revendication 8, caractérisé en ce que des réductions d'épaisseur sont prévues aux emplacements (11) destinés à être disposés au-dessus des têtes des passagers du véhicule.  9. Pavilion according to claim 8, characterized in that thickness reductions are provided at the locations (11) intended to be arranged above the heads of the passengers of the vehicle.
FR7929565A 1979-11-30 1979-11-30 Self supporting structural panel - with open celled carrier layer enclosed in fibre mats with resin binder Granted FR2470679A1 (en)

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FR7929565A FR2470679A1 (en) 1979-11-30 1979-11-30 Self supporting structural panel - with open celled carrier layer enclosed in fibre mats with resin binder
DE19803035449 DE3035449A1 (en) 1979-11-30 1980-09-19 SELF-SUPPORTING AREA COMPONENT
JP16400180A JPS5680450A (en) 1979-11-30 1980-11-20 Selfferecting flat structure element
IT26235/80A IT1134460B (en) 1979-11-30 1980-11-26 Self supporting structural panel

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WO2011075046A1 (en) * 2009-12-14 2011-06-23 Design Force Ab A laminate
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JPH0349749B2 (en) 1991-07-30
DE3035449A1 (en) 1981-06-11
FR2470679B1 (en) 1982-11-26
DE3035449C2 (en) 1993-01-28
JPS5680450A (en) 1981-07-01

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