EP1263583B1 - Method for production of a sound-absorbing element - Google Patents

Method for production of a sound-absorbing element Download PDF

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Publication number
EP1263583B1
EP1263583B1 EP01925480A EP01925480A EP1263583B1 EP 1263583 B1 EP1263583 B1 EP 1263583B1 EP 01925480 A EP01925480 A EP 01925480A EP 01925480 A EP01925480 A EP 01925480A EP 1263583 B1 EP1263583 B1 EP 1263583B1
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EP
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Prior art keywords
layer
sound
barrier layer
soundproofing
absorbing material
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EP01925480A
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German (de)
French (fr)
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EP1263583A1 (en
Inventor
Helmut Ruffer
Uwe Statter
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Plastocell Kunststoff GmbH
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Plastocell Kunststoff GmbH
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    • 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
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • the invention relates to a method for producing a sound insulation element according to the features specified in the preamble of claim 1.
  • a sound insulation element which as a self-supporting Soundproofing plate is formed and as an effective sound absorption medium Layer of rigid polyurethane, phenolic or melamine rigid foam with very low density having.
  • Layer of rigid polyurethane, phenolic or melamine rigid foam with very low density having to protect this plastic foam layer from damage and a To achieve self-supporting sandwich structure is the plastic foam layer on both Laminated sides with dimensionally stable fabrics.
  • fabrics are cross-linked synthetic fiber fleece or block foam layers hewn on the outside as polyurethane foam intended.
  • These block foam layers can also be Glass or synthetic fiber fleece be reinforced, which occurs when the block foam layer is thermally digested is melted into the skin.
  • Soundproofing elements primarily in engine compartments of commercial vehicles, buses, municipal vehicles, Construction machinery and the like.
  • Other areas of application include general machine industry, soundproof booths, shields, partitions or the Boat building, whereby there is in no way a limitation due to the exemplary mention.
  • Such sound insulation elements have the problem that volatile substances, such as water, Oil, diesel fuel, gasoline, dust or the like adversely penetrate. Therefore in the past, such soundproofing elements were laminated with an aluminum foil, but as a result of sound reflections or lack of sound permeability the effectiveness has been significantly reduced.
  • the self-supporting Soundproofing plate is made up of the sound absorption medium or the soundproofing material from a rigid foam, so that an additional effort for the shaping and adaptation to the contour of the component to be insulated. Furthermore point such foams have a substantial porosity and thus absorption capacity for volatile Fabrics so that especially when oil, diesel fuel or petrol penetrate considerable safety risk with regard to ignition with explosive combustion given is.
  • the object of the invention is to use the aforementioned method Manufacturing a soundproofing element in such a way that a simple and Cost-effective production enables and nevertheless a firm and permanent connection of the Layers is achieved.
  • the proposed method enables the in a simple manner and with little effort Production of the sound insulation element, the barrier layer immediately after its production applied while still warm to the surface of the layer of nonwoven and is connected to this. It becomes a direct, fixed connection of the sound-absorbing Fleece layer reached with the barrier layer and the soundproofing element meets the acoustic requirements Requirements without restrictions over a long period of many years.
  • the soundproofing fleece layer goes with the still warm thermoplastic barrier layer a direct connection and due to the existing between the fibers of the fleece Open spaces that are largely connected to each other can possibly penetrate volatile substances emerge without problems and are not stored.
  • barrier layer of a thermoplastic material essentially prevents penetration, especially of volatile substances such as water, oil, diesel fuel, gasoline, dust and the like in particular when exposed to temperature and / or pressure.
  • the barrier layer consists of polypropylene or other thermoplastic materials and is directly connected to the soundproofing material.
  • the Barrier layer in a particularly advantageous manner immediately after production, in particular by means of an extruder, still warm on the surface of the sound-absorbing material applied, so that a "heat connection" with the sound-absorbing material is obtained.
  • the thermoplastic barrier layer and the soundproofing material no adhesive available.
  • the soundproofing material and preferably also the barrier layer are in expediently flexible, so that the attachment and attachment Components of any external contour is easily possible.
  • the fibers and / or the Material components of the nonwoven material have at least approximately none Absorption capacity for any that have penetrated into the sound-absorbing material other substances, so that their storage or retention essentially is prevented.
  • the soundproofing material also contains thermoplastic Components and is designed as a thermoplastic fleece. Furthermore, the sound-absorbing material can contain carbon fibers or even completely Carbon fibers are made. Furthermore, the soundproofing element heat-stable in a temperature range up to more than + 200 ° C, even over one longer period. It should also be noted that the soundproofing element and / or the surface material withstands an open flame for a longer period of time. Furthermore, the sound insulation element can be flat or as a plane Track or be designed as a three-dimensional body. Because of the direct Thermal connection of the thermoplastic barrier layer with the soundproofing Material becomes the fear of detachment when it is used when using adhesives of steam or water or the like, even if this happens under pressure, avoided.
  • Fig. 1 shows schematically a section through the surface product and / or Soundproofing element, containing a layer 2 of soundproofing material, which is formed as a fiber material, in particular as a thermoplastic fleece.
  • the Layer 2 preferably contains or consists of carbon fibers, but can other acoustically active fiber materials can also be provided.
  • the surface of layer 2 or the thermoplastic is sound-absorbing Materials arranged a barrier layer 4, which is made of a thermoplastic Material, in particular made of polypropylene.
  • the barrier layer 4 is immediate bonded to the surface of layer 2.
  • the barrier layer 4 is a thin film made of thermoplastic material.
  • the thermoplastic barrier layer 4 is during production, still in the warm state, especially as a flexible web provided layer 2 applied, for example by means of a roller arrangement or the like, which the layer 2 of soundproofing material and the in the warm state barrier layer 4 are fed together. It exists thus a direct, permanent connection between layer 2 and the barrier layer 4.
  • the thin barrier layer 4 advantageously avoids unwanted sound reflections and ensures unimpeded passage of sound.
  • the outer surface of the barrier layer facing away from layer 2 can also expediently 4 may be provided with an additional thin layer 3, which in particular has been applied by vapor deposition.
  • This additional thin layer 3 consists of advantageously made of aluminum, or an aluminum alloy or ceramic or from a material that can be applied by vapor deposition. Because of this additional thin layer 3, the thickness of which is substantially smaller than the thickness of the barrier layer improves their surface quality and / or hardness in a particularly expedient manner, so that the risk of damage to the barrier layer is significantly reduced.
  • the sound insulation element as a three-dimensional body be formed, one surface of which the barrier layer 4 made of thermoplastic Has material.
  • Fig. 2 an embodiment of the soundproofing element is shown, the soundproofing Layer 2 is provided on both sides with a barrier layer 4, 5.
  • barrier layer 4 applies correspondingly to the second barrier layer 5th
  • FIG. 3 schematically shows the sound insulation element made of the sound insulation layer 2 and the barrier layer 4 in combination with additional sound insulation material 6.
  • Das Soundproofing material 6 can be made in a known manner as a foamed or nonwoven Material or the like may be formed.
  • the barrier layer 4 reliably prevents the penetration of particularly volatile materials such as water, oil or other Substances.
  • the soundproofing material 6 can be provided with self-adhesive equipment be with the soundproofing element and / or for example the sheet metal of an engine compartment, the wall of a soundproof cabin or the like in a simple manner to be connectable.
  • FIG. 4 basically corresponds to the embodiment 3, but with the surface element according to the invention on the additional sound insulation material 6 is arranged that the layer 2 of sound absorbing Material directly on the surface of the additional sound insulation material 6 is arranged.
  • the barrier layer lying on top according to the drawing 4 be provided on the free surface with the vapor-coated layer 3, as is the case is explained with reference to FIG. 1.

Abstract

The invention relates to a sound-absorbing element containing a layer (2) made of a sound-absorbing material, to whose at least one surface an impervious layer (4) is applied. The aim of the invention is to further develop the sound-absorbing element in order to prevent the penetration of, in particular, volatile substances while, at the same time, attaining favorable acoustic properties. To this end, the invention provides that the layer (2) made of a sound-absorbing material is provided in the form of a fibrous material, and the impervious layer (4) is provided in the form of a thermoplastic material.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Schalldämmelements gemäß der im Oberbegriff des Patentanspruchs 1 angegebenen Merkmale.The invention relates to a method for producing a sound insulation element according to the features specified in the preamble of claim 1.

Aus der US 5 298 694 A ist ein derartiges Verfahren bekannt, demgemäß auf eine Gazeschicht das Vlies in situ aufgebracht wird. Nachfolgend wird auf die freie Oberfläche eine Sperrschicht bzw. Folie durch konventionelles Walzen oder Ultraschallschweißen aufgebracht. Ferner wird erläutert, daß alternativ die Schichten mittels Klebemittel oder doppelseitigen Klebebändem verbunden werden können. Das derart gefertigte Laminat wird nachfolgend in einem geeigneten Formgebungswerkzeug unter Einsatz von Druck und Temperatur in Randbereichen warm verformt. Durch eine derartige Warmverformung entsteht ein Formteil, welches beispielsweise als Wandverkleidung einer Kfz-Tür eingesetzt werden kann. Der hierfür erforderliche apparative Aufwand sowie die erforderliche Druckmittel- und Temperaturzufuhr bedingen einen erheblichen Fertigungsaufwand.Such a method is known from US Pat. No. 5,298,694 A, accordingly on a gauze layer the fleece is applied in situ. Then a barrier layer is applied to the free surface or film applied by conventional rolling or ultrasonic welding. Furthermore, explains that alternatively the layers by means of adhesive or double-sided adhesive tapes can be connected. The laminate produced in this way is subsequently in a suitable Shaping tool using pressure and temperature in peripheral areas hot deformed. Such a thermoforming produces a molded part, which, for example can be used as a wall covering of a motor vehicle door. The one required for this Equipment expenditure as well as the necessary pressure medium and temperature supply require one considerable manufacturing effort.

Des weiteren ist aus der DE 198 21 532 A eine wärme- und schalldämmende Verkleidung bekannt, welche eine duroplastische Schaumschicht und eine akustisch isolierende Schicht aus Kunststoffschaum, Partikelverbundschaum oder Faservlies enthält. Diese Verkleidungen werden in der Weise hergestellt, daß die beiden genannten Schichten sowie weitere Schichten unter Einwirkung von gegenüber Raumtemperatur erhöhter Temperatur und gegenüber dem Normaldruck erhöhten Druck verpreßt werden. Auch gemäß dieses Verfahrens werden somit die bereits vorhandenen Schichten in einem zusätzlichen Verfahrensschritt unter Zufuhr von Energie zwecks Erhöhung der Temperatur und des Drucks miteinander verbunden.Furthermore, from DE 198 21 532 A is a heat and sound insulating lining known, which has a thermosetting foam layer and an acoustically insulating layer Contains plastic foam, particle composite foam or non-woven fabric. These disguises are produced in such a way that the two layers mentioned and further layers under the influence of a temperature that is higher than room temperature and that of Normal pressure increased pressure to be pressed. Also according to this procedure the existing layers in an additional process step with the addition of Energy combined to increase temperature and pressure.

Ferner ist aus der DE 35 34 690 A ein Schalldämmelement bekannt, welches als eine selbsttragende Schalldämmplatte ausgebildet ist und als wirksames Schallabsorptionsmedium eine Schicht aus steifem Polyurethan-, Phenol- oder Melaminhartschaum mit sehr geringer Dichte aufweist. Um diese Kunststoff-Schaumschicht vor Beschädigung zu schützen und um eine selbsttragende Sandwichstruktur zu erreichen, ist die Kunststoff-Schaumschicht auf beiden Seiten mit dimensionsstabilen Flächengebilden kaschiert. Als derartige Flächengebilde sind vernetzte Kunstfaservliese oder außenseitig verhautete Blockschaumschichten als Polyurethanschaum vorgesehen. Auch diese Blockschaumschichten können durch ein Mineral-, Glas- oder Kunstfaservlies verstärkt sein, welches beim thermischen Verhauten der Blockschaumschicht in die Haut eingeschmolzen wird. Furthermore, from DE 35 34 690 A a sound insulation element is known, which as a self-supporting Soundproofing plate is formed and as an effective sound absorption medium Layer of rigid polyurethane, phenolic or melamine rigid foam with very low density having. To protect this plastic foam layer from damage and a To achieve self-supporting sandwich structure is the plastic foam layer on both Laminated sides with dimensionally stable fabrics. As such fabrics are cross-linked synthetic fiber fleece or block foam layers hewn on the outside as polyurethane foam intended. These block foam layers can also be Glass or synthetic fiber fleece be reinforced, which occurs when the block foam layer is thermally digested is melted into the skin.

Insbesondere in der Automobilindustrie besteht ein erheblicher Bedarf für den Einsatz von Schalldämmelementen, vornehmlich in Motorräumen von Nutzfahrzeugen, Bussen, Kommunalfahrzeugen, Baumaschinen und dergleichen. Weitere Einsatzgebiete sind beispielsweise die allgemeine Maschinenindustrie, Schallschutzkabinen, Abschirmungen, Trennwände oder der Bootsbau, wobei durch die beispietshafte Nennung keineswegs eine Beschränkung erfolgt. Bei derartigen Schalldämmelementen besteht die Problematik, daß flüchtige Stoffe, wie Wasser, Öl, Dieselkraftstoff, Benzin, Staub oder ähnliches in nachteiliger Weise eindringen. Daher wurden in der Vergangenheit derartige Schalldämmelemente mit einer Aluminiumfolie kaschiert, wodurch aber in Folge von Schallreflektionen oder mangelnder Schalldurchlässigkeit die Wirksamkeit nicht unerheblich reduziert wurde. Bei der oben erwähnten, selbsttragenden Schalldämmplatte besteht das Schallabsorptionsmedium bzw. das schalldämmende Material aus einem steifen Schaum, so daß ein zusätzlicher Aufwand für die Formgebung und Anpassung an die Kontur des zu dämmenden Bauteils erforderlich ist. Des weiteren weisen derartige Schaumstoffe eine erhebliche Porösität und somit Aufnahmefähigkeit für flüchtige Stoffe auf, so daß insbesondere beim Eindringen von Öl, Dieselkraftstoff oder Benzin ein beträchtliches Sicherheitsrisiko hinsichtlich der Entzündung mit explosionsartiger Verbrennung gegeben ist.In the automotive industry in particular, there is a considerable need for the use of Soundproofing elements, primarily in engine compartments of commercial vehicles, buses, municipal vehicles, Construction machinery and the like. Other areas of application include general machine industry, soundproof booths, shields, partitions or the Boat building, whereby there is in no way a limitation due to the exemplary mention. at Such sound insulation elements have the problem that volatile substances, such as water, Oil, diesel fuel, gasoline, dust or the like adversely penetrate. Therefore in the past, such soundproofing elements were laminated with an aluminum foil, but as a result of sound reflections or lack of sound permeability the effectiveness has been significantly reduced. With the self-supporting Soundproofing plate is made up of the sound absorption medium or the soundproofing material from a rigid foam, so that an additional effort for the shaping and adaptation to the contour of the component to be insulated. Furthermore point such foams have a substantial porosity and thus absorption capacity for volatile Fabrics so that especially when oil, diesel fuel or petrol penetrate considerable safety risk with regard to ignition with explosive combustion given is.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, das genannte Verfahren zur Herstellung eines Schalldämmelements dahingehend auszubilden, daß eine einfache und kostengünstige Fertigung ermöglicht und gleichwohl eine feste und dauerhafte Verbindung der Schichten erreicht wird.Proceeding from this, the object of the invention is to use the aforementioned method Manufacturing a soundproofing element in such a way that a simple and Cost-effective production enables and nevertheless a firm and permanent connection of the Layers is achieved.

Die Lösung erfolgt gemäß der Merkmale des Patentanspruchs 1.The solution is in accordance with the features of claim 1.

Das vorgeschlagene Verfahren ermöglicht in einfacher Weise und mit geringem Aufwand die Herstellung des Schalldämmelements, wobei die Sperrschicht unmittelbar nach deren Fertigung noch in warmem Zustand auf die Oberfläche der Schicht aus Vlies direkt aufgebracht und mit dieser verbunden wird. Es wird eine unmittelbare feste Verbindung der schalldämmenden Vliesschicht mit der Sperrschicht erreicht und das Schalldämmelement erfüllt die schalltechnischen Anforderungen ohne Einschränkungen über einen langen Zeitraum von vielen Jahren. Die schalldämmende Vliesschicht geht mit der noch warmen thermoplastischen Sperrschicht eine unmittelbare Verbindung ein und aufgrund der zwischen den Fasern des Vlies vorhandenen Freiräume, welche weitestgehend miteinander in Verbindung stehen, können ggfs. eingedrungene flüchtige Stoffe problemlos wieder heraustreten und werden nicht gespeichert. Die auf einer Oberfläche des schalldämmenden Materials angeordnete Sperrschicht aus einem thermoplastischen Werkstoff verhindert im wesentlichen das Eindringen, insbesondere von flüchtigen Stoffen, wie Wasser, Öl, Dieselkraftstoff, Benzin, Staub und dergleichen und zwar auch insbesondere bei Temperatureinwirkung und/oder Druck. Die Sperrschicht besteht aus Polypropylen oder anderen thermoplastischen Werkstoffen und ist direkt mit dem schalldämmenden Material verbunden. Hierzu wird die Sperrschicht in besonders vorteilhafter Weise unmittelbar nach der Fertigung, insbesondere mittels eines Extruders, noch im warmen Zustand auf die Oberfläche des schalldämmenden Materials aufgebracht, so daß eine "Wärmeverbindung" mit dem schalldämmenden Material erhalten wird. In bevorzugter Weise sind somit zwischen der thermoplastischen Sperrschicht und dem schalldämmenden Material keine Klebemittel vorhanden. Das schalldämmende Material und bevorzugt auch die Sperrschicht sind in zweckmäßiger Weise flexibel ausgebildet, so daß die Anbringung und Befestigung an Bauelementen beliebiger Außenkontur problemlos möglich ist. Die Fasern und/oder die Materialbestandteile des Vlieswerkstoffes besitzen zumindest näherungsweise kein Aufnahmevermögen für gegebenenfalls in das schalldämmende Material eingedrungene sonstige Stoffe, so daß insgesamt deren Speicherung oder Festhalten im wesentlichen unterbunden ist.The proposed method enables the in a simple manner and with little effort Production of the sound insulation element, the barrier layer immediately after its production applied while still warm to the surface of the layer of nonwoven and is connected to this. It becomes a direct, fixed connection of the sound-absorbing Fleece layer reached with the barrier layer and the soundproofing element meets the acoustic requirements Requirements without restrictions over a long period of many years. The soundproofing fleece layer goes with the still warm thermoplastic barrier layer a direct connection and due to the existing between the fibers of the fleece Open spaces that are largely connected to each other can possibly penetrate volatile substances emerge without problems and are not stored. The on a surface of the sound absorbing material arranged barrier layer of a thermoplastic material essentially prevents penetration, especially of volatile substances such as water, oil, diesel fuel, gasoline, dust and the like in particular when exposed to temperature and / or pressure. The barrier layer consists of polypropylene or other thermoplastic materials and is directly connected to the soundproofing material. For this, the Barrier layer in a particularly advantageous manner immediately after production, in particular by means of an extruder, still warm on the surface of the sound-absorbing material applied, so that a "heat connection" with the sound-absorbing material is obtained. Are therefore preferably between the thermoplastic barrier layer and the soundproofing material no adhesive available. The soundproofing material and preferably also the barrier layer are in expediently flexible, so that the attachment and attachment Components of any external contour is easily possible. The fibers and / or the Material components of the nonwoven material have at least approximately none Absorption capacity for any that have penetrated into the sound-absorbing material other substances, so that their storage or retention essentially is prevented.

Das schalldämmende Material enthält gleichfalls thermoplastische Bestandteile und ist als ein thermoplastisches Vlies ausgebildet. Ferner kann das schalldämmende Material Kohlefasern enthalten oder auch völlig aus Kohlefasern gefertigt sein. Des weiteren ist das Schalldämmelement in einem Temperaturbereich bis größer +200° C wärmestabil, und zwar auch über einen längeren Zeitraum. Weiterhin sei festgehalten, daß das Schalldämmelement und/oder das Oberflächenmaterial über einen längeren Zeitraum einer offenen Flamme standhält. Des weiteren kann das Schalldämmelement plan bzw. als ebene Bahn oder auch als ein dreidimensionaler Körper ausgebildet sein. Aufgrund der direkten Wärmeverbindung der thermoplastischen Sperrschicht mit dem schalldämmenden Material wird das bei Einsatz von Klebestoffen zu befürchtende Ablösen beim Einwirken von Dampf oder Wasser oder dergleichen, selbst wenn dies unter Druck geschieht, vermieden.The soundproofing material also contains thermoplastic Components and is designed as a thermoplastic fleece. Furthermore, the sound-absorbing material can contain carbon fibers or even completely Carbon fibers are made. Furthermore, the soundproofing element heat-stable in a temperature range up to more than + 200 ° C, even over one longer period. It should also be noted that the soundproofing element and / or the surface material withstands an open flame for a longer period of time. Furthermore, the sound insulation element can be flat or as a plane Track or be designed as a three-dimensional body. Because of the direct Thermal connection of the thermoplastic barrier layer with the soundproofing Material becomes the fear of detachment when it is used when using adhesives of steam or water or the like, even if this happens under pressure, avoided.

Weiterbildungen und besondere Ausgestaltungen der Erfindung sind in den Unteransprüchen sowie der weiteren Beschreibung angegeben.Further developments and special refinements of the invention are in the subclaims as well as the further description.

Das Schalldämmelement wird nachfolgend anhand der in der Zeichnung dargestellten Ausführungsbeispiele erläutert, ohne daß insoweit eine Beschränkung erfolgt. Es zeigen:

Fig. 1
schematisch einen Schnitt durch das Schalldämmelement,
Fig. 2
Fig. 2 schematisch einen Schnitt durch das auf beiden Oberflächen mit einer Sperrschicht versehene Schalldämmelement,
Fig. 3
schematisch einen Schnitt durch das Schalldämmelement in Kombination mit einem zusätzlichen akustisch wirksamen Werkstoff,
Fig. 4
schematisch einen Schnitt ähnlich Fig. 3, wobei jedoch die Sperrschicht an der Außenseite angeordnet ist.
The soundproofing element is explained below with reference to the exemplary embodiments shown in the drawing, without there being any limitation. Show it:
Fig. 1
schematically a section through the soundproofing element,
Fig. 2
2 schematically shows a section through the soundproofing element provided on both surfaces with a barrier layer,
Fig. 3
schematically a section through the soundproofing element in combination with an additional acoustically active material,
Fig. 4
schematically shows a section similar to FIG. 3, but with the barrier layer being arranged on the outside.

Fig. 1 zeigt schematisch einen Schnitt durch das Oberlächenprodukt und/oder das Schalldämmelement, enthaltend eine Schicht 2 aus schalldämmendem Material, welches als Faserwerkstoff, insbesondere als thermoplastisches Vlies ausgebildet ist. Die Schicht 2 enthält oder besteht in bevorzugter Weise aus Kohlefasern, doch können gleichermaßen auch andere akustisch wirksame Faserwerkstoffe vorgesehen sein. Ferner ist an einer Oberfläche der Schicht 2 bzw. des thermoplastischen, schalldämmenden Materials eine Sperrschicht 4 angeordnet, welche aus einem thermoplastischen Werkstoff, insbesondere aus Polypropylen, besteht. Die Sperrschicht 4 ist unmittelbar mit der Oberfläche der Schicht 2 verbunden. Die Sperrschicht 4 ist als eine dünne Folie aus thermoplastischem Werkstoff ausgebildet. Die thermoplastische Sperrschicht 4 ist während der Fertigung noch im warmen Zustand auf die insbesondere als flexible Bahn bereitgestellte Schicht 2 aufgebracht, beispielsweise mittels einer Walzenanordnung oder dergleichen, welcher die Schicht 2 aus schalldämmendem Material und die noch im warmen Zustand befindliche Sperrschicht 4 gemeinsam zugeführt werden. Es besteht somit eine direkte, dauerhafte Verbindung zwischen der Schicht 2 und der Sperrschicht 4. Die dünne Sperrschicht 4 vermeidet in vorteilhafter Weise unerwünschte Schallreflektionen und gewährleistet einen ungehinderten Schalldurchtritt. In besonders zweckmäßiger Weise kann ferner die der Schicht 2 abgewandte Außenfläche der Sperrschicht 4 mit einer zusätzlichen dünnen Schicht 3 versehen sein, welche insbesondere durch Bedampfen aufgebracht worden ist. Diese zusätzliche dünne Schicht 3 besteht in vorteilhafter Weise aus Aluminium, oder einer Aluminiumlegierung oder aus Keramik oder aus einem durch Bedampfen aufbringbaren Material. Aufgrund dieser zusätzlichen dünnen Schicht 3, deren Dicke wesentlich kleiner ist als die Dicke der Sperrschicht, wird in besonders zweckmäßiger Weise deren Oberflächengüte und/oder Härte verbessert, so daß die Gefahr von Beschädigungen der Sperrschicht wesentlich reduziert wird. Fig. 1 shows schematically a section through the surface product and / or Soundproofing element, containing a layer 2 of soundproofing material, which is formed as a fiber material, in particular as a thermoplastic fleece. The Layer 2 preferably contains or consists of carbon fibers, but can other acoustically active fiber materials can also be provided. Furthermore, the surface of layer 2 or the thermoplastic is sound-absorbing Materials arranged a barrier layer 4, which is made of a thermoplastic Material, in particular made of polypropylene. The barrier layer 4 is immediate bonded to the surface of layer 2. The barrier layer 4 is a thin film made of thermoplastic material. The thermoplastic barrier layer 4 is during production, still in the warm state, especially as a flexible web provided layer 2 applied, for example by means of a roller arrangement or the like, which the layer 2 of soundproofing material and the in the warm state barrier layer 4 are fed together. It exists thus a direct, permanent connection between layer 2 and the barrier layer 4. The thin barrier layer 4 advantageously avoids unwanted sound reflections and ensures unimpeded passage of sound. Especially The outer surface of the barrier layer facing away from layer 2 can also expediently 4 may be provided with an additional thin layer 3, which in particular has been applied by vapor deposition. This additional thin layer 3 consists of advantageously made of aluminum, or an aluminum alloy or ceramic or from a material that can be applied by vapor deposition. Because of this additional thin layer 3, the thickness of which is substantially smaller than the thickness of the barrier layer improves their surface quality and / or hardness in a particularly expedient manner, so that the risk of damage to the barrier layer is significantly reduced.

Anstelle des dargestellten planen oder als Bahn ausgebildeten Schalldämmelements kann erfindungsgemäß das Schalldämmelement auch als dreidimensionaler Körper ausgebildet sein, wobei eine Oberfläche desselben die Sperrschicht 4 aus thermoplastischem Werkstoff aufweist.Instead of the plan shown or designed as a soundproofing element can according to the invention the sound insulation element as a three-dimensional body be formed, one surface of which the barrier layer 4 made of thermoplastic Has material.

In Fig. 2 ist eine Ausführungsform des Schalldämmelements dargestellt, dessen schalldämmende Schicht 2 beidseitig jeweils mit einer Sperrschicht 4, 5 versehen ist. Die vorstehenden Erläuterungen zur Sperrschicht 4 gelten entsprechend zur zweiten Sperrschicht 5.In Fig. 2 an embodiment of the soundproofing element is shown, the soundproofing Layer 2 is provided on both sides with a barrier layer 4, 5. The The above explanations for barrier layer 4 apply correspondingly to the second barrier layer 5th

Fig. 3 zeigt schematisch das Schalldämmelement aus der schalldämmenden Schicht 2 und der Sperrschicht 4 in Kombination mit zusätzlichem Schalldämm-Material 6. Das Schalldämm-Material 6 kann in bekannter Weise als geschäumter oder vliesgefertigter Werkstoff oder dergleichen ausgebildet sein. Die Sperrschicht 4 verhindert zuverlässig das Eindringen von insbesondere flüchtigen Werkstoffen, wie Wasser, Öl oder sonstigen Stoffen. Das Schalldämm-Material 6 kann mit einer Selbstklebeausrüstung versehen sein, um mit dem Schalldämmelement und/oder beispielsweise dem Blech eines Motorraumes, der Wand einer Schallschutzkabine oder dergleichen in einfacher Weise verbindbar zu sein.3 schematically shows the sound insulation element made of the sound insulation layer 2 and the barrier layer 4 in combination with additional sound insulation material 6. Das Soundproofing material 6 can be made in a known manner as a foamed or nonwoven Material or the like may be formed. The barrier layer 4 reliably prevents the penetration of particularly volatile materials such as water, oil or other Substances. The soundproofing material 6 can be provided with self-adhesive equipment be with the soundproofing element and / or for example the sheet metal of an engine compartment, the wall of a soundproof cabin or the like in a simple manner to be connectable.

Die in Fig. 4 dargestellte Ausführungsform entspricht grundsätzlich der Ausführungsform gemäß Fig. 3, wobei jedoch das erfindungsgemäße Oberflächenelement derart auf dem zusätzlichen Schalldämm-Material 6 angeordnet ist, daß die Schicht 2 aus schalldämmendem Material direkt auf der Oberfläche des zusätzlichen Schalldämm-Materials 6 angeordnet ist. In bevorzugter Weise kann die gemäß Zeichnung obenliegende Sperrschicht 4 an der freien Oberfläche mit der bedampften Schicht 3 versehen sein, wie es anhand von Fig. 1 erläutert ist.The embodiment shown in FIG. 4 basically corresponds to the embodiment 3, but with the surface element according to the invention on the additional sound insulation material 6 is arranged that the layer 2 of sound absorbing Material directly on the surface of the additional sound insulation material 6 is arranged. In a preferred manner, the barrier layer lying on top according to the drawing 4 be provided on the free surface with the vapor-coated layer 3, as is the case is explained with reference to FIG. 1.

Claims (8)

  1. Method for producing a sound-absorbing element comprising a layer (2) made of a sound-absorbing material, which is configured as a nonwoven, and comprising an impervious layer (4) made of a thermoplastic material, characterised in that immediately after the impervious layer (4) has been produced, while it is still warm, it is applied directly to the surface of the layer (2) made of a nonwoven, and is connected thereto.
  2. Method according to claim 1, characterised in that a thermoplastic nonwoven is used for the layer (2) made of a sound-absorbing material.
  3. Method according to claim 1 or claim 2, characterised in that a nonwoven made entirely or partially of carbon fibres is used for the layer (2) made of a sound-absorbing material.
  4. Method according to any one of claims 1 to 3, characterised in that a flexible material is used for the layer (2) made of a sound-absorbing material.
  5. Method according to any one of claims 1 to 4, characterised in that the sound-absorbing element is arranged on a sound-absorbing material (6), which, in particular, is configured as a foamed or nonwoven material.
  6. Method according to claim 5, characterised in that a sound-absorbing material (6) provided with a self-adhesive finish is used.
  7. Method according to any one of claims 1 to 6, characterised in that a thin layer (3) is applied to the surface of the impervious layer (4) that is remote from the layer (2), in particular by vaporisation.
  8. Method according to claim 7, characterised in that aluminium, an aluminium alloy or ceramics are used to apply the thin layer (3).
EP01925480A 2000-03-16 2001-03-16 Method for production of a sound-absorbing element Expired - Lifetime EP1263583B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20004796U 2000-03-16
DE20004796U DE20004796U1 (en) 2000-03-16 2000-03-16 Soundproofing element
PCT/EP2001/003047 WO2001070499A1 (en) 2000-03-16 2001-03-16 Sound-absorbing element

Publications (2)

Publication Number Publication Date
EP1263583A1 EP1263583A1 (en) 2002-12-11
EP1263583B1 true EP1263583B1 (en) 2004-09-29

Family

ID=7938801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01925480A Expired - Lifetime EP1263583B1 (en) 2000-03-16 2001-03-16 Method for production of a sound-absorbing element

Country Status (10)

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EP (1) EP1263583B1 (en)
AT (1) ATE277759T1 (en)
AU (1) AU2001252215A1 (en)
DE (2) DE20004796U1 (en)
DK (1) DK1263583T3 (en)
ES (1) ES2227175T3 (en)
PL (1) PL358099A1 (en)
PT (1) PT1263583E (en)
TR (1) TR200402578T4 (en)
WO (1) WO2001070499A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017701A1 (en) * 2004-04-10 2005-10-27 Saurer Gmbh & Co. Kg Spindle cover, especially for a twisting machine, comprises damping plates attached to a flexible sheet that also acts as a hinge
DE202007007323U1 (en) 2007-05-23 2007-08-16 Gummi-Welz Gmbh U. Co. Kg Gummi-Kunststofftechnik-Schaumstoffe Isolating unit for constructing/isolating e.g. engine compartment lining, has foamed material layers that are made of high and low heat-resistant closed porous foamed materials, and connected to each other
ES2335253B1 (en) * 2007-06-11 2011-05-16 Gea 21, S.A. ACOUSTIC INSULATION AND PROCEDURE FOR OBTAINING.
ES2339418B1 (en) * 2008-11-18 2011-06-09 Gea 21, S.A. IMPROVEMENTS INTRODUCED IN THE PATENT OF INVENTION P200701600 BY ACOUSTIC INSULATION AND PROCEDURE FOR OBTAINING IT.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2946892A1 (en) * 1979-11-21 1981-06-04 Erste Deutsche Basaltwolle Kg A. Messler, 8712 Volkach Heat and sound insulation - for metal structures by fibre mat covering plastic layer with filler
DE3539146A1 (en) * 1985-11-05 1987-05-14 Ford Werke Ag WHEEL HOUSING LINING FOR MOTOR VEHICLES
DE9114103U1 (en) * 1991-11-13 1992-02-06 Johann Borgers Gmbh & Co Kg, 4290 Bocholt, De
US5298694A (en) * 1993-01-21 1994-03-29 Minnesota Mining And Manufacturing Company Acoustical insulating web
DE9408097U1 (en) * 1994-05-17 1995-09-14 Faist M Gmbh & Co Kg Soundproofing component
IT239745Y1 (en) * 1996-05-27 2001-03-13 San Valeriano S P A WHEELHOUSE COVER PANEL FOR VEHICLES.
DE19821532A1 (en) * 1998-05-14 1999-11-25 Hp Chemie Pelzer Res & Dev Lower cost, heat and noise absorbing shroud, manufacturing method and use of shroud in an engine vehicle compartment
DE29903908U1 (en) * 1999-03-05 1999-07-08 Cww Gerko Akustik Gmbh & Co Kg Insulation part

Also Published As

Publication number Publication date
AU2001252215A1 (en) 2001-10-03
ES2227175T3 (en) 2005-04-01
PL358099A1 (en) 2004-08-09
EP1263583A1 (en) 2002-12-11
DE20004796U1 (en) 2000-07-06
DK1263583T3 (en) 2004-12-20
PT1263583E (en) 2005-01-31
ATE277759T1 (en) 2004-10-15
DE50103877D1 (en) 2004-11-04
WO2001070499A1 (en) 2001-09-27
TR200402578T4 (en) 2004-12-21

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