EP1952385A2 - Sound absorbing material - Google Patents

Sound absorbing material

Info

Publication number
EP1952385A2
EP1952385A2 EP06806346A EP06806346A EP1952385A2 EP 1952385 A2 EP1952385 A2 EP 1952385A2 EP 06806346 A EP06806346 A EP 06806346A EP 06806346 A EP06806346 A EP 06806346A EP 1952385 A2 EP1952385 A2 EP 1952385A2
Authority
EP
European Patent Office
Prior art keywords
sound
flame
retardant
absorbing material
film
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.)
Withdrawn
Application number
EP06806346A
Other languages
German (de)
French (fr)
Inventor
Rolf Pfeifer
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.)
Cellofoam GmbH and Co KG
Original Assignee
Cellofoam GmbH and Co KG
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 Cellofoam GmbH and Co KG filed Critical Cellofoam GmbH and Co KG
Publication of EP1952385A2 publication Critical patent/EP1952385A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • 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
    • B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/18—Internal lining, e.g. insulating
    • B61D17/185—Internal lining, e.g. insulating for sound insulating
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered

Definitions

  • the invention relates to sound-absorbing material, the z. B. is used as a lining of the engine compartment of vehicles, especially in public transport. Such sound absorbing material is also used for railcar wagon walls and aircraft fuselage areas.
  • Porous foam material can be sealed by means of films.
  • Be thin sound-transparent films such. As polyurethane films, so you can indeed solve the acoustic requirements, but not the fire safety requirements, because these films burn in the prescribed fire test RL 95/28 EC bright lights.
  • non-flammable films There are non-flammable films. If some classified as non-combustible films on porous foam such. B. melamine resin foam, which is incombustible, are applied, the film burns due to the porosity of the foam. It is known that individual incombustible materials still burn in combination due to mutual catalyst action. The In fact, even in combination with non-flammable foam material, they are all sound-proof and stiff in their nature, so that they are not usable in terms of sound insulation.
  • the invention has the object of providing sound-absorbing material in such a way that it meets the requirements of sound insulation on the one hand and fire protection on the other hand.
  • Fig. 1 shows schematically in a cross section a foam layer with a powder coating under a foil cover
  • Fig. 2 shows a modified embodiment in section.
  • a layer 1 of sound-absorbing material is at least on the part of the surface to be protected against fire, sprinkled with flame-retardant material 2 in powder form or coated by spraying.
  • the sound-absorbing material 1 is preferably made of melamine resin foam, but may also consist of polyurethane foam, fleece, felt or mineral fiber layers.
  • a flame-retardant material 2 marketable products such as expanded graphite and / or based on nitrogen and phosphorus products can be used, which withdraw oxygen or heat under the influence of temperature of the environment and thus prevent a flame development on the surface of the absorber material.
  • Denoted by 3 is a transparent transparent film which is disposed over the layer of flame retardant powder 2 or a corresponding sprayed solution.
  • the film 3 can in Fire itself burning, but by the present between the film 3 and absorber surface flame retardant powder 2 but a triggered by the film flame is stifled.
  • foams set to be flame retardant are used.
  • the film 3 would still burn, the flame is stifled by the flame retardant coating material 2.
  • the powder can be mixed with an adhesive before application.
  • the flame-retardant powder 2 can also be fixed by melting the surface of the film and / or the absorber 1.
  • the grain size of the flame-retardant powder 2 is preferably chosen so that it can not readily penetrate into the pores of the foam material. If the sound-absorbing material z. B. is used in the engine compartment of a vehicle, it is exposed to vibrations through which the flame-retardant powder 2 could penetrate into the pores of the absorber material 1, so that it loses its flame retardant effect on the surface. To prevent this, the grain size of the powder in relation to the porosity of the absorber material can be chosen so that penetration into the pores is prevented. Additionally or alternatively, the powder material is fixed for example by an adhesive or by melting on the surface of the absorber material or on the surface of the film 3 so that no vibration of the powder material can result. In this case, it is not necessary for the flame-retardant powder 2 to form a closed layer.
  • the absorber material 1 sprinkled with flame-retardant powder 2 or sprayed with an appropriate solution can be stamped, cut or otherwise formed in accordance with the molding requirements, so that it can be used as a lining in, for example, an engine compartment can be used. Because of the different and sometimes very complicated shape for the lining of an engine compartment, for example, a three-dimensional deformation, such as a concave or convex or provided with a paragraph shaping of the sound absorber is often required so that it can be adapted to the given shape.
  • the sprinkled with flame-retardant powder or sprayed with a flame-retardant solution absorbent material 1, which is tailored to the requirements, is surrounded on the front and expediently also at the edges by a deformable sound-transparent film, preferably made of polyurethane.
  • a flame-retardant coating 2 is preferably provided in the entire area, which is covered by the film 3. If the absorber material 1 covered in this way by a film 3 is adhered to, for example, a non-combustible carrier material, for example a metal wall, the back side of the absorber material 1 can remain free of a coating 2 and / or a film covering.
  • the absorber material for example, only inserted into the wall paneling of a vehicle, so the absorber material 1 is coated on all sides of the film 3. Because of the risk that the film itself could burn, a flame-retardant coating 2 is also provided on the back side between the film and the absorber material, i. H. in the entire area, which is covered by the film. Due to the complete coverage of the absorber material, oil or fuel can not penetrate the absorber material from either side.
  • the film is applied by heat shrinking on the absorber material, wherein a three-dimensional deformation can be made.
  • the absorber material In the case of an absorber material 1 completely encased by a sound-transparent film 3, the dew point problem is also solved since the surfaces are tightly closed. Thus, the absorber material meets all requirements for fire protection, sound insulation and thermal properties.
  • the flame-retardant powder 2 or a sprayed-on solution on the outside of the film 3, in addition to a coating 2 between the film 3 and absorber material 1 or instead of the provided between the film 3 and the absorber material 1 2 coating.
  • a coating or a sheet-like structure can be provided, which foams or heat when exposed to temperature and forms an insulating layer.
  • the absorber material 1 may be provided with a surface structuring, for example with mutually offset concave and convex areas.
  • the film may straddle the concave portions of the surface structure, preferably fixing the flame-retardant material 2 to the film.
  • FIG. 2 shows an embodiment in which a fleece 4 is arranged between the flame retardant 2 and the foam material 1.
  • a fleece 4 can be provided between the film 3 and the flame retardant 2.
  • a fleece 4 on one side and / or the other side of the layer of flame-retardant material 2 a further improvement of the soundproofing and fire retardant properties can be achieved.
  • the flame-retardant material 2 can also be incorporated into the fleece.
  • the embodiment according to the invention can be used in a variety of ways in various absorber materials, such as felt or fleece and a wide variety of shapes, not only in public transport.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Multimedia (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention concerns a sound absorbing material, particularly in the form of open-cell foam, in which the requirements with regard to fire protection, are met without impairing the acoustic properties. To this end, at least a portion of the surface is covered with a flame-retarding powder or sprayed with a flame-retarding solution on the sound absorbing material that is covered by an acoustically transparent film.

Description

Schallabsorbierendes Material Sound absorbing material
Die Erfindung betrifft schallabsorbierendes Material, das z. B. als Auskleidung des Motorraums von Fahrzeugen verwendet wird, insbesondere bei öffentlichen Verkehrsmitteln. Derartiges schallabsorbierendes Material wird auch für Waggonwände von Schienenfahrzeugen und im Rumpfbereich von Flugzeugen eingesetzt.The invention relates to sound-absorbing material, the z. B. is used as a lining of the engine compartment of vehicles, especially in public transport. Such sound absorbing material is also used for railcar wagon walls and aircraft fuselage areas.
Es ist bekannt, für die Schallpegelminderung im Motorraum von Fahrzeugen offenporiges Schaumstoffmaterial zu verwenden. Dicke und Materialeigenschaften wie Porosität bestimmen die zu erreichende Schallpegelminderung.It is known to use for the noise reduction in the engine compartment of vehicles open-cell foam material. Thickness and material properties such as porosity determine the sound level reduction to be achieved.
Nach neueren Richtlinien muss schalldämmendes Material insbesondere in öffentlichen Verkehrsmitteln strenge Auflagen hinsichtlich Brandschutz erfüllen und häufig wird auch eine thermisch isolierende Eigenschaft gefordert, wobei Taupunktprobleme besondere Schwierigkeiten bereiten, die mit offenporigen Schaumstoffen nicht gelöst werden können.According to recent guidelines, soundproofing material must meet stringent fire protection requirements, especially on public transport, and thermal insulation is often required, with dew point problems posing particular difficulties that can not be solved with open cell foams.
Versiegelte bzw. dichte Schaumstoffe dämmen den Schall zwar, dämpfen bzw. mindern den Schall aber nicht und sind somit für den Motorraum schalltechnisch ungeeignet. Andererseits wird für den Brandschutz die Forderung nach dichteren Oberflächen gestellt, die weder Brandbeschleuniger wie Öl oder Treibstoff durchlassen noch an der Oberfläche festhalten.Sealed or impervious foams insulate the sound, but do not attenuate or reduce the sound and are therefore not suitable for the engine compartment in terms of sound technology. On the other hand, the demand for denser surfaces is made for fire protection, let neither fire accelerators such as oil or fuel pass through or hold on to the surface.
Poröses Schaumstoffmaterial kann mittels Folien abgedichtet werden. Werden dünne schalltransparente Folien, wie z. B. Polyurethanfolien, verwendet, so kann man zwar die akustischen Anforderungen lösen, nicht aber die brandtechnischen Anforderungen, weil diese Folien im vorgeschriebenen Brandtest RL 95/28 EG lichterloh brennen.Porous foam material can be sealed by means of films. Be thin sound-transparent films such. As polyurethane films, so you can indeed solve the acoustic requirements, but not the fire safety requirements, because these films burn in the prescribed fire test RL 95/28 EC bright lights.
Es gibt nicht brennbare Folien. Wenn manche als nichtbrennbar klassifizierte Folien auf porösem Schaumstoff wie z. B. Melaminharzschaum, der unbrennbar ist, aufgebracht werden, brennt die Folie dennoch aufgrund der Porosität des Schaumstoffs. Es ist bekannt, dass einzelne unbrennbare Materialien in Kombination aufgrund gegenseitiger Katalysatorwirkung dennoch brennen. Die tatsächlich auch in einer Kombination mit Schaumstoffmaterial nicht brennbaren Folien sind in ihrer Beschaffenheit aber allesamt schalldicht und steif, sodass sie hinsichtlich Schallschutz nicht brauchbar sind.There are non-flammable films. If some classified as non-combustible films on porous foam such. B. melamine resin foam, which is incombustible, are applied, the film burns due to the porosity of the foam. It is known that individual incombustible materials still burn in combination due to mutual catalyst action. The In fact, even in combination with non-flammable foam material, they are all sound-proof and stiff in their nature, so that they are not usable in terms of sound insulation.
Insgesamt werden damit an schallabsorbierendes Material Anforderungen gestellt, die sich gegenseitig ausschließen.Overall, requirements are made of sound-absorbing material that exclude each other.
Der Erfindung liegt die Aufgabe zugrunde, schallabsorbierendes Material so auszubilden, dass es den Anforderungen an Schallschutz einerseits und Brandschutz andererseits gerecht wird.The invention has the object of providing sound-absorbing material in such a way that it meets the requirements of sound insulation on the one hand and fire protection on the other hand.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Anspruch 1 gelöst. Dadurch, dass das poröse Absorbermaterial, vorzugsweise Melaminharzschaum, an der Oberfläche mit einem flammhemmenden Pulver bestreut oder mit einer flammhemmenden Lösung besprüht ist, wird ein wirksamer Brandschutz erreicht, ohne dass die schallabsorbierenden Eigenschaften des Materials beeinträchtigt werden, wobei durch die schalltransparente Folie ein Eindringen von Kraftstoff oder dergleichen brennbarem Material in den Absorber verhindert wird..This object is achieved by the features in claim 1. The fact that the porous absorber material, preferably melamine resin foam, sprinkled on the surface with a flame-retardant powder or sprayed with a flame-retardant solution, an effective fire protection is achieved without affecting the sound-absorbing properties of the material, wherein the sound-transparent film penetration of Fuel or the like combustible material is prevented in the absorber ..
Die Erfindung wird beispielsweise anhand der Zeichnung näher erläutert.The invention will be explained in more detail for example with reference to the drawing.
Fig. 1 zeigt schematisch in einem Querschnitt eine Schaumstofflage mit einer Pulverbeschichtung unter einer Folienabdeckung, und Fig. 2 eine abgewandelte Ausführungsform im Schnitt.Fig. 1 shows schematically in a cross section a foam layer with a powder coating under a foil cover, and Fig. 2 shows a modified embodiment in section.
In Fig. 1 ist eine Lage 1 aus schallabsorbierendem Material zumindest auf dem Teil der Oberfläche, der gegen Brandentwicklung geschützt werden soll, mit flammhemmendem Material 2 in Pulverform bestreut oder durch Aufsprühen beschichtet. Das schallabsorbierende Material 1 besteht vorzugsweise aus Melaminharzschaum, kann aber auch aus Polyurethanschaum, Vlies-, Filz- oder Mineralfaserlagen bestehen. Als flammhemmendes Material 2 können marktgängige Produkte wie Blähgraphit und/oder auf Stickstoff und Phosphor basierende Produkte eingesetzt werden, die bei Temperatureinwirkung der Umgebung Sauerstoff oder Wärme entziehen und damit eine Flammentwicklung auf der Oberfläche des Absorbermaterials verhindern.In Fig. 1, a layer 1 of sound-absorbing material is at least on the part of the surface to be protected against fire, sprinkled with flame-retardant material 2 in powder form or coated by spraying. The sound-absorbing material 1 is preferably made of melamine resin foam, but may also consist of polyurethane foam, fleece, felt or mineral fiber layers. As a flame-retardant material 2 marketable products such as expanded graphite and / or based on nitrogen and phosphorus products can be used, which withdraw oxygen or heat under the influence of temperature of the environment and thus prevent a flame development on the surface of the absorber material.
Mit 3 ist eine schalltransparente Folie bezeichnet, die über der Lage aus flammhemmendem Pulver 2 oder einer entsprechenden aufgesprühten Lösung angeordnet ist. Die Folie 3 kann im Brandfall selbst brennen, durch das zwischen Folie 3 und Absorberoberfläche vorhandene flammhemmende Pulver 2 wird aber eine durch die Folie ausgelöste Flamme erstickt.Denoted by 3 is a transparent transparent film which is disposed over the layer of flame retardant powder 2 or a corresponding sprayed solution. The film 3 can in Fire itself burning, but by the present between the film 3 and absorber surface flame retardant powder 2 but a triggered by the film flame is stifled.
Dadurch, dass eine schalltransparente Folie 3 verwendet wird, bleiben die schallabsorbierenden Eigenschaften des porösen Absorbermaterials 1 erhalten. Durch Wahl der Folienart können die schalltechnischen Eigenschaften noch eingestellt werden. Das auf der Absorberoberfläche aufgebrachte flammhemmende Pulver 2 beeinträchtigt die schalltechnischen Eigenschaften des Absorbermaterials nicht.Characterized in that a sound transparent film 3 is used, the sound-absorbing properties of the porous absorber material 1 are retained. By selecting the type of foil, the acoustic properties can still be adjusted. The applied on the absorber surface flame retardant powder 2 does not affect the sound properties of the absorber material.
Vorzugsweise werden an sich schwer entflammbar eingestellte Folien verwendet. Wenn aber aufgrund einer Katalysatorwirkung durch das poröse schallabsorbierende Material 1 die Folie 3 dennoch brennen würde, wird die Flamme durch das flammhemmendes Beschichtungsmaterial 2 erstickt.Preferably, foams set to be flame retardant are used. However, if due to a catalytic effect by the porous sound absorbing material 1, the film 3 would still burn, the flame is stifled by the flame retardant coating material 2.
Um das Pulvermaterial an der Schaumstoffoberfläche zu fixieren, kann das Pulver vor dem Aufbringen mit einem Klebstoff vermischt werden. Nach einer anderen Ausführungsform kann das flammhemmende Pulver 2 auch durch Anschmelzen der Oberfläche der Folie und/oder des Absorbers 1 fixiert werden.In order to fix the powder material to the foam surface, the powder can be mixed with an adhesive before application. According to another embodiment, the flame-retardant powder 2 can also be fixed by melting the surface of the film and / or the absorber 1.
Die Korngröße des flammhemmenden Pulvers 2 wird vorzugsweise so gewählt, dass sie nicht ohne weiteres in die Poren des Schaumstoffmaterials eindringen kann. Wenn das schallabsorbierende Material z. B. im Motorraum eines Fahrzeugs eingesetzt wird, ist es Vibrationen ausgesetzt, durch die das flammhemmende Pulver 2 in die Poren des Absorbermaterials 1 eindringen könnte, sodass es seine flammhemmende Wirkung an der Oberfläche verliert. Um dies zu verhindern, kann die Korngröße des Pulvers im Verhältnis zur Porosität des Absorbermaterials so gewählt werden, dass ein Eindringen in die Poren verhindert wird. Zusätzlich oder als Alternative wird das Pulvermaterial beispielsweise durch einen Kleber oder durch Anschmelzen an der Oberfläche des Absorbermaterials oder auch an der Oberfläche der Folie 3 so fixiert, dass sich bei Vibrationen keine Verlagerung des Pulvermaterials ergeben kann. Hierbei ist es nicht erforderlich, dass das flammhemmende Pulver 2 eine geschlossene Schicht bildet.The grain size of the flame-retardant powder 2 is preferably chosen so that it can not readily penetrate into the pores of the foam material. If the sound-absorbing material z. B. is used in the engine compartment of a vehicle, it is exposed to vibrations through which the flame-retardant powder 2 could penetrate into the pores of the absorber material 1, so that it loses its flame retardant effect on the surface. To prevent this, the grain size of the powder in relation to the porosity of the absorber material can be chosen so that penetration into the pores is prevented. Additionally or alternatively, the powder material is fixed for example by an adhesive or by melting on the surface of the absorber material or on the surface of the film 3 so that no vibration of the powder material can result. In this case, it is not necessary for the flame-retardant powder 2 to form a closed layer.
Das mit flammhemmendem Pulver 2 bestreute oder mit einer entsprechenden Lösung besprühte Absorbermaterial 1 kann entsprechend den Formerfordernissen gestanzt, geschnitten oder in anderer Weise geformt werden, sodass es als Auskleidung beispielsweise in einem Motorraum verwendet werden kann. Wegen der unterschiedlichen und teilweise sehr komplizierten Formgebung für die Auskleidung beispielsweise eines Motorraums wird oft eine dreidimensionale Verformung, beispielsweise eine konkave bzw. konvexe oder mit einem Absatz versehene Formgebung, des Schallabsorbers gefordert, damit er der vorgegebenen Form angepasst werden kann.The absorber material 1 sprinkled with flame-retardant powder 2 or sprayed with an appropriate solution can be stamped, cut or otherwise formed in accordance with the molding requirements, so that it can be used as a lining in, for example, an engine compartment can be used. Because of the different and sometimes very complicated shape for the lining of an engine compartment, for example, a three-dimensional deformation, such as a concave or convex or provided with a paragraph shaping of the sound absorber is often required so that it can be adapted to the given shape.
Das mit flammhemmendem Pulver bestreute oder mit einer flammhemmenden Lösung besprühte Absorbermaterial 1 , das entsprechend den Anforderungen zugeschnitten ist, wird auf der Vorderseite und zweckmäßigerweise auch an den Kanten durch eine verformbare schalltransparente Folie vorzugsweise aus Polyurethan umgeben. Hierbei wird eine flammhemmende Beschichtung 2 vorzugsweise in dem ganzen Bereich vorgesehen, der von der Folie 3 abgedeckt wird. Wenn das auf diese Weise von einer Folie 3 abgedeckte Absorbermaterial 1 beispielsweise an einem nichtbrennbarem Trägermaterial, beispielsweise einer Blechwand, festgeklebt wird, so kann die Rückseite des Absorbermaterials 1 frei von einer Beschichtung 2 und/oder einer Folienabdeckung bleiben. Wird aber das Absorbermaterial beispielsweise in die Wandverkleidung eines Fahrzeugs nur eingelegt, so wird das Absorbermaterial 1 allseitig von der Folie 3 ummantelt. Wegen der Gefahr, dass die Folie selbst brennen könnte, wird auch auf der Rückseite zwischen Folie und Absorbermaterial eine flammhemmende Beschichtung 2 vorgesehen, d. h. im gesamten Bereich, der durch die Folie abgedeckt ist. Durch die vollständige Abdeckung des Absorbermaterials kann von keiner Seite aus Öl oder Kraftstoff in das Absorbermaterial eindringen. Vorzugsweise wird die Folie durch Warmschrumpfen auf dem Absorbermaterial aufgebracht, wobei eine dreidimensionale Verformung vorgenommen werden kann.The sprinkled with flame-retardant powder or sprayed with a flame-retardant solution absorbent material 1, which is tailored to the requirements, is surrounded on the front and expediently also at the edges by a deformable sound-transparent film, preferably made of polyurethane. Here, a flame-retardant coating 2 is preferably provided in the entire area, which is covered by the film 3. If the absorber material 1 covered in this way by a film 3 is adhered to, for example, a non-combustible carrier material, for example a metal wall, the back side of the absorber material 1 can remain free of a coating 2 and / or a film covering. But if the absorber material, for example, only inserted into the wall paneling of a vehicle, so the absorber material 1 is coated on all sides of the film 3. Because of the risk that the film itself could burn, a flame-retardant coating 2 is also provided on the back side between the film and the absorber material, i. H. in the entire area, which is covered by the film. Due to the complete coverage of the absorber material, oil or fuel can not penetrate the absorber material from either side. Preferably, the film is applied by heat shrinking on the absorber material, wherein a three-dimensional deformation can be made.
Bei einem durch eine schalltransparente Folie 3 vollständig ummantelten Absorbermaterial 1 wird auch das Taupunktproblem gelöst, da die Oberflächen dicht geschlossen sind. Damit wird das Absorbermaterial allen Anforderungen an Brandschutz, Schallschutz und hinsichtlich thermischen Eigenschaften gerecht.In the case of an absorber material 1 completely encased by a sound-transparent film 3, the dew point problem is also solved since the surfaces are tightly closed. Thus, the absorber material meets all requirements for fire protection, sound insulation and thermal properties.
Es ist auch möglich, das flammhemmende Pulver auf einer schalltransparenten Folie durch einen Kleber oder durch Anschmelzen aufzubringen, bevor diese auf dem schallabsorbierenden Material 1 aufgebracht wird.It is also possible to apply the flame-retardant powder on a sound-transparent film by an adhesive or by melting before it is applied to the sound-absorbing material 1.
Nach einer Abwandlung ist es auch möglich, das flammhemmende Pulver 2 bzw. eine aufgesprühte Lösung auf der Außenseite der Folie 3 aufzubringen, zusätzlich zu einer Beschichtung 2 zwischen Folie 3 und Absorbermaterial 1 oder anstelle der zwischen Folie 3 und Absorbermaterial 1 vorgesehenen Beschichtung 2.According to a modification, it is also possible to apply the flame-retardant powder 2 or a sprayed-on solution on the outside of the film 3, in addition to a coating 2 between the film 3 and absorber material 1 or instead of the provided between the film 3 and the absorber material 1 2 coating.
Als flammhemmendes Material 2 kann auch eine Beschichtung oder ein flächiges Gebilde vorgesehen werden, die bzw. welches bei Temperatureinwirkung aufschäumt und eine Dämmschicht bildet.As a flame-retardant material 2, a coating or a sheet-like structure can be provided, which foams or heat when exposed to temperature and forms an insulating layer.
Das Absorbermaterial 1 kann mit einer Oberflächenstrukturierung versehen sein, beispielsweise mit zueinander versetzten konkaven und konvexen Bereichen. Bei einem solchen Material mit Oberflächenstruktur kann die Folie die konkaven Bereiche der Oberflächenstruktur überspannen, wobei vorzugsweise das flammhemmende Material 2 an der Folie fixiert wird.The absorber material 1 may be provided with a surface structuring, for example with mutually offset concave and convex areas. In such a material having a surface structure, the film may straddle the concave portions of the surface structure, preferably fixing the flame-retardant material 2 to the film.
Fig. 2 zeigt eine Ausführungsform, bei der zwischen Flammschutzmittel 2 und Schaumstoffmaterial 1 ein Vlies 4 angeordnet ist. Bei einer anderen Ausführungsform kann zwischen Folie 3 und Flammschutzmittel 2 ein Vlies 4 vorgesehen werden.FIG. 2 shows an embodiment in which a fleece 4 is arranged between the flame retardant 2 and the foam material 1. In another embodiment, a fleece 4 can be provided between the film 3 and the flame retardant 2.
Durch ein Vlies 4 auf der einen und/oder der anderen Seite der Schicht aus flammhemmenden Material 2 kann eine weitere Verbesserung der schallschutztechnischen und brandhemmenden Eigenschaften erzielt werden. Hierbei kann das flammhemmende Material 2 auch in das Vlies eingelagert werden.By a fleece 4 on one side and / or the other side of the layer of flame-retardant material 2, a further improvement of the soundproofing and fire retardant properties can be achieved. In this case, the flame-retardant material 2 can also be incorporated into the fleece.
Die erfindungsgemäße Ausgestaltung ist bei verschiedenen Absorbermaterialien wie Filz oder Vlies und unterschiedlichster Formgebung vielfältig einsetzbar, nicht nur in öffentlichen Verkehrsmitteln. The embodiment according to the invention can be used in a variety of ways in various absorber materials, such as felt or fleece and a wide variety of shapes, not only in public transport.

Claims

Ansprüche claims
1. Schallabsorbierendes Material, insbesondere in der Form von offenporigem Schaumstoff, der von einer schalltransparenten Folie (3) abgedeckt ist, wobei zumindest ein Teil der Oberfläche des schallabsorbierenden Materials mit einem flammhemmenden Pulver (2) belegt oder mit einer flammhemmenden Lösung besprüht ist.1. Sound-absorbing material, in particular in the form of open-pored foam, which is covered by a sound-transparent film (3), wherein at least a part of the surface of the sound-absorbing material is coated with a flame-retardant powder (2) or sprayed with a flame-retardant solution.
2. Schallabsorbierendes Material nach Anspruch 1, wobei das flammhemmende Pulver mit einem Klebstoff durchmischt ist.2. A sound absorbing material according to claim 1, wherein the flame retardant powder is mixed with an adhesive.
3. Schallabsorbierendes Material nach Anspruch 1 oder 2, wobei die Folie (3) das Absorbermaterial (1) vollständig ummantelt.3. Sound-absorbing material according to claim 1 or 2, wherein the film (3) the absorber material (1) completely sheathed.
4. Schallabsorbierendes Material nach einem der vorhergehenden Ansprüche, wobei die Lage aus flammhemmendem Material (2) zwischen der schalltransparenten Folie (3) und dem Absorbermaterial (1) angeordnet ist.4. Sound-absorbing material according to one of the preceding claims, wherein the layer of flame-retardant material (2) between the sound-transparent film (3) and the absorber material (1) is arranged.
5. Schallabsorbierendes Material nach einem der Ansprüche 1 bis 3, wobei die flammhemmende Beschichtung (2) auf der Außenseite der schalltransparenten Folie (3) aufgebracht ist.5. Sound-absorbing material according to one of claims 1 to 3, wherein the flame-retardant coating (2) on the outside of the sound-transparent film (3) is applied.
6. Schallabsorbierendes Material nach Anspruch 4 oder 5, wobei ein Vlies (4) auf der einen und/oder der anderen Seite der Lage aus flammhemmenden Material (2) angeordnet ist.6. Sound-absorbing material according to claim 4 or 5, wherein a non-woven (4) on one and / or the other side of the layer of flame-retardant material (2) is arranged.
7. Schallabsorbierendes Material nach einem der Ansprüche 1 bis 3, wobei das flammhemmende Material (2) in ein Vlies (4) eingelagert ist, das zwischen der schalltransparenten Folie (3) und Schaumstoffmaterial (1) angeordnet ist. 7. Sound-absorbing material according to one of claims 1 to 3, wherein the flame-retardant material (2) is embedded in a non-woven (4) which is arranged between the sound-transparent film (3) and foam material (1).
EP06806346A 2005-10-17 2006-10-17 Sound absorbing material Withdrawn EP1952385A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005049570A DE102005049570B3 (en) 2005-10-17 2005-10-17 Sound absorbing material e.g. melamine resin foam, for e.g. carriage wall of rail vehicle, has surface with portion coated with flame retardant powder or sprinkled with retardant solution, where material is covered by sound transparent film
PCT/EP2006/010021 WO2007045446A2 (en) 2005-10-17 2006-10-17 Sound absorbing material

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US20100170745A1 (en) 2010-07-08
WO2007045446A3 (en) 2007-07-26
DE102005049570B3 (en) 2007-04-05
WO2007045446A2 (en) 2007-04-26

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