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WO1994020292A1 - Improvements relating to bonded panel structures - Google Patents

Improvements relating to bonded panel structures Download PDF

Info

Publication number
WO1994020292A1
WO1994020292A1 PCT/GB1994/000424 GB9400424W WO9420292A1 WO 1994020292 A1 WO1994020292 A1 WO 1994020292A1 GB 9400424 W GB9400424 W GB 9400424W WO 9420292 A1 WO9420292 A1 WO 9420292A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
panel structure
bonded
bonded panel
structure according
Prior art date
Application number
PCT/GB1994/000424
Other languages
French (fr)
Inventor
Henry Bernard Gray
Kunio Cho
Mitsugoshi Ogata
Original Assignee
Eften Europa B.V.
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 Eften Europa B.V. filed Critical Eften Europa B.V.
Priority to GB9517783A priority Critical patent/GB2290749A/en
Priority to AU61473/94A priority patent/AU6147394A/en
Publication of WO1994020292A1 publication Critical patent/WO1994020292A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard 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
    • 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
    • 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
    • B32B29/08—Corrugated 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
    • 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
    • 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
    • B32B3/28—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 a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B60R13/0212—Roof or head liners
    • B60R13/0225—Roof or head liners self supporting head liners
    • 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
    • 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
    • B32B2038/042—Punching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/26—All layers being made of paper or paperboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • 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
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • 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
    • B32B2607/00—Walls, panels
    • 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

Definitions

  • This invention is concerned with improvements relating to bonded panel structures.
  • a conventional bonded panel comprises a corrugated or fluted core, conventionally of heavy-duty paper such as Kraft, and inner and outer layers, conventionally also of heavy-duty paper such Kraft, bonded to the core by a heat-softenable adhesive such as polyethylene.
  • a conventional bonded panel may be moulded by the application of heat and pressure, the inner and/or outer layers slipping over the core whilst the moulding takes place, and the adhesive sets on cooling with the panel in its moulded configuration.
  • Such a bonded panel is conventionally used on the interior of motor vehicles, the inner layer being attached, such as by the use of adhesive, by ties, by clips or simple press-fitting as is disclosed in the above-mentioned patent specifications, to the vehicle body surface, and the outer layer being covered by a decorative layer.
  • a bonded panel structure comprising a corrugated or fluted core layer, and inner and outer layers on ⁇ opposite sides of the core, being bonded to the core by adhesive, wherein the iv outer layer is provided with a plurality of acoustic apertures.
  • the apertures are in the form of holes, typically having a diameter no less than 1mm (i.e. larger than the prickle holes conventionally provided in such a panel for the escape of hot gases on the interior of the panel during moulding), and preferably being no greater than 8mm, a range of 2 to 5mm being desirable.
  • the panel structure after being moulded to a desirable shape is secured within a vehicle body (e.g. the interior of the roof) noise within the body enters the interior of the bonded panel structure through the acoustic apertures, and is so muffled.
  • a vehicle body e.g. the interior of the roof
  • the invention is particularly beneficial to bonded panel structures of the type comprising layers of heavy duty paper (such as Kraft, having a weight typically in the order of 100 to 200 grams per square metre) affording a significant part of the core, inner and outer layers.
  • heavy duty paper such as Kraft, having a weight typically in the order of 100 to 200 grams per square metre
  • the bonded panel structure comprises a decorative layer (e.g. of fabric) bonded to the outer layer, preferably by a heat softenable adhesive in the form of an open mesh or web.
  • a decorative layer e.g. of fabric
  • the adhesive does not flow to any great extent into or over the acoustic holes.
  • the decorative covering may be secured to the outer surface of the outer layer by a thin layer of adhesive, the adhesive extending over the acoustic holes, and behaving like a drum skin, and in such a configuration the acoustic holes nonetheless carry out a significant degree of acoustic damping.
  • the corrugated layer may comprise a layer of aluminium foil on the outer side thereof (that is, on the side thereof adjacent to the outer layer). In this manner the corrugated layer may be protected, in circumstances where moist warm air enters the interior of the cavity through the acoustic holes.
  • the bonded panel structure shown in the accompanying drawings comprises a core layer C, bonded between inner and outer layers A, B respectively, a decorative covering D being secured to the outer side of the layer B.
  • the panel structure is secured, such as to a vehicle roof, with the layer A secured adjacent to the vehicle body, such as by the use of adhesive or ties, the layer D facing the interior of the vehicle.
  • each of the layers A B and C comprises, as its major constituent, a layer of Kraft, typically having a weight of about 150 grams per square metre, although it will be appreciated that other similar materials may be used.
  • a layer of Kraft typically having a weight of about 150 grams per square metre, although it will be appreciated that other similar materials may be used.
  • the layer 6 of Kraft having on the surface adjacent to the core a layer 7 of polyethylene, and having a layer 8 of a lighter weight paper-like material such as Kraft paper 8 secured to the opposite side of the layer 6 by a layer of polyethylene adhesive 9.
  • the layer 7 of adhesive is facing the core, with the layer of lighter weight material 8 affording the outwardly facing surface.
  • the core layer B comprises simply a layer 6c of heavy duty paper and bonded thereto on the side adjacent to the layer B a lighter weight paper-like material 8c.
  • a plurality of acoustic holes 10 conveniently being provided by a punching operation, having a diameter of about 3mm, and provided at a spacing of between 5mm to 20mm.
  • the layer D of decorative material is secured to the outer surface of layer 8b_ by adhesive in the form of an open mesh or web 12, whereby the decorative layer D may be secured in position without any significant degree of blocking of the holes 10.
  • the noise absorption factor is increased significantly across the range of frequencies found to be objectionable, specifically in the range 1000 - 2000 hz.
  • the acoustic holes 10 are provided in the layer B during manufacture thereof and prior to the bonding of the layer to the core layer C, it will be appreciated that the acoustic holes 10, although being significantly larger than the prickle holes conventionally used, may nonetheless serve the function as the prickle holes, and additional prickle holes need not be provided.
  • the core layer C may comprise a layer of aluminium foil, having a thickness within the range 6 to 50 microns, preferably 12 to 28 microns, and desirably about 18 microns, so as to protect the layer 6c. of Kraft from the deleterious effect of such an atmosphere.
  • the layer of aluminium is interposed between the layers 6c . and 8c.

Landscapes

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

Abstract

A bonded panel structure comprises a core layer (C) bonded between inner and outer layers (B), a decorative covering (D) being secured to the outer layer by a layer of adhesive. In use the panel structure is secured, such as to a vehicle roof, with the layer (A) adjacent to the vehicle body, such as by the use of adhesive or ties, the layer (D) facing the interior of the vehicle. Provided in the layer (B) are a plurality of acoustic holes (10), provided by a punching operation, having a diameter of 3 mm, and a spacing of between 5 mm to 20 mm. If desired the core may be provided with a layer of aluminium.

Description

Title: Improvements relating to bonded panel structures Description of Invention
This invention is concerned with improvements relating to bonded panel structures.
A conventional bonded panel comprises a corrugated or fluted core, conventionally of heavy-duty paper such as Kraft, and inner and outer layers, conventionally also of heavy-duty paper such Kraft, bonded to the core by a heat-softenable adhesive such as polyethylene. Such a conventional bonded panel may be moulded by the application of heat and pressure, the inner and/or outer layers slipping over the core whilst the moulding takes place, and the adhesive sets on cooling with the panel in its moulded configuration.
Examples of such conventional bonded panel structures may be found in British Patent Specification Nos. 2004810, 2038707, 2029755, 1576396, 1558150, 1575663, 1582539, 1548807, 1532762, 1554073, 1576546, 1576142, 1555882, 1501027.
Such a bonded panel is conventionally used on the interior of motor vehicles, the inner layer being attached, such as by the use of adhesive, by ties, by clips or simple press-fitting as is disclosed in the above-mentioned patent specifications, to the vehicle body surface, and the outer layer being covered by a decorative layer.
Increasing attention is being given to noise suppression within automotive vehicles, and it is one of the various objects of this invention to provide a bonded panel structure which may be utilised within the body of a vehicle which suppresses noise to a greater extent than has heretofore been attained.
According to this invention there is provided a bonded panel structure comprising a corrugated or fluted core layer, and inner and outer layers on ^ opposite sides of the core, being bonded to the core by adhesive, wherein the iv outer layer is provided with a plurality of acoustic apertures.
Preferably the apertures are in the form of holes, typically having a diameter no less than 1mm (i.e. larger than the prickle holes conventionally provided in such a panel for the escape of hot gases on the interior of the panel during moulding), and preferably being no greater than 8mm, a range of 2 to 5mm being desirable.
Thus where the panel structure after being moulded to a desirable shape is secured within a vehicle body (e.g. the interior of the roof) noise within the body enters the interior of the bonded panel structure through the acoustic apertures, and is so muffled.
The invention is particularly beneficial to bonded panel structures of the type comprising layers of heavy duty paper (such as Kraft, having a weight typically in the order of 100 to 200 grams per square metre) affording a significant part of the core, inner and outer layers.
Preferably the bonded panel structure comprises a decorative layer (e.g. of fabric) bonded to the outer layer, preferably by a heat softenable adhesive in the form of an open mesh or web. In this manner the adhesive does not flow to any great extent into or over the acoustic holes. However surprisingly it has been found that the decorative covering may be secured to the outer surface of the outer layer by a thin layer of adhesive, the adhesive extending over the acoustic holes, and behaving like a drum skin, and in such a configuration the acoustic holes nonetheless carry out a significant degree of acoustic damping.
If desired, to avoid damage to the corrugated layer whilst subjected to high humidity and high temperature for extensive periods of time (as may be encountered during environmental testing) the corrugated layer may comprise a layer of aluminium foil on the outer side thereof (that is, on the side thereof adjacent to the outer layer). In this manner the corrugated layer may be protected, in circumstances where moist warm air enters the interior of the cavity through the acoustic holes.
There will now be given a detailed description, to be read with reference to the accompanying drawings, of a bonded panel structure which is a preferred embodiment of this invention, having been selected for the purposes of illustrating the invention by way of example. The accompanying drawing is a schematic perspective view of part of the bonded panel structure which is the preferred embodiment of the invention.
The bonded panel structure shown in the accompanying drawings comprises a core layer C, bonded between inner and outer layers A, B respectively, a decorative covering D being secured to the outer side of the layer B.
In use the panel structure is secured, such as to a vehicle roof, with the layer A secured adjacent to the vehicle body, such as by the use of adhesive or ties, the layer D facing the interior of the vehicle.
In the preferred embodiment each of the layers A B and C comprises, as its major constituent, a layer of Kraft, typically having a weight of about 150 grams per square metre, although it will be appreciated that other similar materials may be used. Thus, for the inner and outer layers A, B, there is provided the layer 6 of Kraft, having on the surface adjacent to the core a layer 7 of polyethylene, and having a layer 8 of a lighter weight paper-like material such as Kraft paper 8 secured to the opposite side of the layer 6 by a layer of polyethylene adhesive 9.
In both inner and outer layers the layer 7 of adhesive is facing the core, with the layer of lighter weight material 8 affording the outwardly facing surface.
Conversely, the core layer B comprises simply a layer 6c of heavy duty paper and bonded thereto on the side adjacent to the layer B a lighter weight paper-like material 8c.
Provided in the layer B are a plurality of acoustic holes 10, conveniently being provided by a punching operation, having a diameter of about 3mm, and provided at a spacing of between 5mm to 20mm.
The layer D of decorative material is secured to the outer surface of layer 8b_ by adhesive in the form of an open mesh or web 12, whereby the decorative layer D may be secured in position without any significant degree of blocking of the holes 10. In this manner it has been found that, by the provision of acoustic holes 10 as described above, the noise absorption factor is increased significantly across the range of frequencies found to be objectionable, specifically in the range 1000 - 2000 hz.
Nonetheless it has been found that, when the decorative layer D is secured to the outer side of the layer 8b_ by a continuous film of adhesive, a significant degree of attenuation is obtained, the film of adhesive extending over the holes 10 and acting as drum skins, in attenuating sound.
Since the acoustic holes 10 are provided in the layer B during manufacture thereof and prior to the bonding of the layer to the core layer C, it will be appreciated that the acoustic holes 10, although being significantly larger than the prickle holes conventionally used, may nonetheless serve the function as the prickle holes, and additional prickle holes need not be provided.
However where it is desired that the panel withstand the effects of high humidity and high temperature for significant periods of time, the core layer C may comprise a layer of aluminium foil, having a thickness within the range 6 to 50 microns, preferably 12 to 28 microns, and desirably about 18 microns, so as to protect the layer 6c. of Kraft from the deleterious effect of such an atmosphere. In such a construction, conveniently the layer of aluminium is interposed between the layers 6c. and 8c.
It is to be appreciated that the accompanying drawing is for the purposes of illustrating the invention, and is not to scale.
The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims

CLAIMS:
1. A bonded panel structure comprising a corrugated or fluted core layer (C) and inner and outer layers (A, B) on opposite sides of the core being bonded to the core by adhesive, wherein the outer layer is provided with a plurality of acoustic apertures (10).
2. A bonded panel structure according to Claim 1 wherein the apertures (10) are in the form of holes.
3. A bonded panel structure according to one of Claims 1 and 2 wherein the apertures have a diameter of less than 1mm, preferably being no greater than 8mm, and desirably lying within the range of 2mm to 5mm.
4. A bonded panel structure according to any one of Claims 2 and 3 wherein the holes are provided at a spacing of between 5mm and 20mm.
5. A bonded panel structure according to any one of the preceding claims comprising layers (9) of heavy duty paper having a weight within the range 100 to 200 grams per square metre affording a significant part of the core, in and outer layers.
6. A bonded panel structure according to any one of the preceding claims comprising a decorative layer (10) bonded to the outer layer by a heat softenable adhesive.
7. A bonded panel structure according to Claim 6 wherein the adhesive is in the form of an open mesh or web (12).
8. A bonded panel structure according to any one of the preceding claims wherein the corrugated layer comprises a layer of aluminium foil on the outer side thereof.
9. A bonded panel structure according to Claim 8 wherein the aluminium foil has a thickness which lies within in the range 6 to 50 microns, preferably between 12 and 28 microns, preferably about 18 microns.
10. A bonded panel structure constructed and arranged substantially as hereinbefore described with reference to the accompanying drawing:
PCT/GB1994/000424 1993-03-04 1994-03-04 Improvements relating to bonded panel structures WO1994020292A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9517783A GB2290749A (en) 1993-03-04 1994-03-04 Improvements relating to bonded panel structures
AU61473/94A AU6147394A (en) 1993-03-04 1994-03-04 Improvements relating to bonded panel structures

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939304453A GB9304453D0 (en) 1993-03-04 1993-03-04 Improvements relating to bonded panel structures
GB9304453.5 1993-03-04

Publications (1)

Publication Number Publication Date
WO1994020292A1 true WO1994020292A1 (en) 1994-09-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/000424 WO1994020292A1 (en) 1993-03-04 1994-03-04 Improvements relating to bonded panel structures

Country Status (3)

Country Link
AU (1) AU6147394A (en)
GB (2) GB9304453D0 (en)
WO (1) WO1994020292A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096151A1 (en) * 2000-06-09 2001-12-20 Collins & Aikman Automotive Systems Limited Absorptive automobile coverings
EP1264943A1 (en) * 2001-06-07 2002-12-11 Josef Dipl.-Ing Aichholzer Wall, ceiling and sound proofing element
US6595321B1 (en) 2002-03-28 2003-07-22 Collins & Aikman Products Co. Floor mats having peripheral apertures with acoustic absorbing material
WO2006056351A1 (en) * 2004-11-24 2006-06-01 Fritz Egger Gmbh & Co. Cover layer and panel with sound-absorption properties and method for producing said layer and panel
DE102005016654A1 (en) * 2005-04-12 2006-10-19 Airbus Deutschland Gmbh Sandwich structure for sound absorbtion in vehicle especially in aircraft with a structured vented layer between two cover layers on top of a sound damping support layer
WO2007134626A1 (en) * 2006-05-24 2007-11-29 Airbus Deutschland Gmbh Sandwich element for the sound-absorbing inner cladding of means of transport, especially for the sound-absorbing inner cladding of aircraft
AT510130B1 (en) * 2010-06-18 2014-12-15 Bayerische Motoren Werke Ag INTERIOR COVERING PART FOR A VEHICLE ROOF
FR3031077A1 (en) * 2014-12-31 2016-07-01 Faurecia Automotive Ind STRUCTURING FLOOR OF A MOTOR VEHICLE, AND METHOD OF MANUFACTURING THE SAME

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB531059A (en) * 1939-07-11 1940-12-27 Ardor Engineering Company Ltd Improvements in or relating to insulating material
US3991848A (en) * 1974-08-16 1976-11-16 Frigitemp Acoustical board
FR2369868A1 (en) * 1976-11-08 1978-06-02 Bepro Bv PELLET AND PROCESS FOR THE MANUFACTURE OF PELLETS
DE8714436U1 (en) * 1987-10-30 1988-02-11 HDW-Isoliertechnik GmbH, 24149 Kiel Filling plate made of sound-absorbing and heat-insulating material
EP0341652A2 (en) * 1988-05-10 1989-11-15 Manville Corporation Corrugated paperboard automative liner
US5022943A (en) * 1989-08-25 1991-06-11 Eften, Inc. Method of making thermoformably shaped fibreboard sandwich structures
DE4141855A1 (en) * 1991-12-18 1993-06-24 Rex Patent THERMAL AND ACOUSTIC INSULATED LAMINATE

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB531059A (en) * 1939-07-11 1940-12-27 Ardor Engineering Company Ltd Improvements in or relating to insulating material
US3991848A (en) * 1974-08-16 1976-11-16 Frigitemp Acoustical board
FR2369868A1 (en) * 1976-11-08 1978-06-02 Bepro Bv PELLET AND PROCESS FOR THE MANUFACTURE OF PELLETS
DE8714436U1 (en) * 1987-10-30 1988-02-11 HDW-Isoliertechnik GmbH, 24149 Kiel Filling plate made of sound-absorbing and heat-insulating material
EP0341652A2 (en) * 1988-05-10 1989-11-15 Manville Corporation Corrugated paperboard automative liner
US5022943A (en) * 1989-08-25 1991-06-11 Eften, Inc. Method of making thermoformably shaped fibreboard sandwich structures
DE4141855A1 (en) * 1991-12-18 1993-06-24 Rex Patent THERMAL AND ACOUSTIC INSULATED LAMINATE

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096151A1 (en) * 2000-06-09 2001-12-20 Collins & Aikman Automotive Systems Limited Absorptive automobile coverings
EP1264943A1 (en) * 2001-06-07 2002-12-11 Josef Dipl.-Ing Aichholzer Wall, ceiling and sound proofing element
US6595321B1 (en) 2002-03-28 2003-07-22 Collins & Aikman Products Co. Floor mats having peripheral apertures with acoustic absorbing material
WO2006056351A1 (en) * 2004-11-24 2006-06-01 Fritz Egger Gmbh & Co. Cover layer and panel with sound-absorption properties and method for producing said layer and panel
DE102005016654A1 (en) * 2005-04-12 2006-10-19 Airbus Deutschland Gmbh Sandwich structure for sound absorbtion in vehicle especially in aircraft with a structured vented layer between two cover layers on top of a sound damping support layer
DE102005016654B4 (en) * 2005-04-12 2008-11-20 Airbus Deutschland Gmbh Sandwich element for sound-absorbing interior lining of means of transport, in particular for the sound-absorbing inner lining of aircraft
WO2007134626A1 (en) * 2006-05-24 2007-11-29 Airbus Deutschland Gmbh Sandwich element for the sound-absorbing inner cladding of means of transport, especially for the sound-absorbing inner cladding of aircraft
AT510130B1 (en) * 2010-06-18 2014-12-15 Bayerische Motoren Werke Ag INTERIOR COVERING PART FOR A VEHICLE ROOF
FR3031077A1 (en) * 2014-12-31 2016-07-01 Faurecia Automotive Ind STRUCTURING FLOOR OF A MOTOR VEHICLE, AND METHOD OF MANUFACTURING THE SAME

Also Published As

Publication number Publication date
GB2290749A (en) 1996-01-10
GB9517783D0 (en) 1995-11-15
AU6147394A (en) 1994-09-26
GB9304453D0 (en) 1993-04-21

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