EP0095125A2 - Plane element for sound-wave absorption - Google Patents

Plane element for sound-wave absorption Download PDF

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Publication number
EP0095125A2
EP0095125A2 EP83104841A EP83104841A EP0095125A2 EP 0095125 A2 EP0095125 A2 EP 0095125A2 EP 83104841 A EP83104841 A EP 83104841A EP 83104841 A EP83104841 A EP 83104841A EP 0095125 A2 EP0095125 A2 EP 0095125A2
Authority
EP
European Patent Office
Prior art keywords
film
foam
hump
sound
flat element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83104841A
Other languages
German (de)
French (fr)
Other versions
EP0095125A3 (en
EP0095125B1 (en
Inventor
Walter Machholz
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.)
Metzeler Schaum GmbH
Original Assignee
Metzeler Schaum GmbH
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 Metzeler Schaum GmbH filed Critical Metzeler Schaum GmbH
Publication of EP0095125A2 publication Critical patent/EP0095125A2/en
Publication of EP0095125A3 publication Critical patent/EP0095125A3/en
Application granted granted Critical
Publication of EP0095125B1 publication Critical patent/EP0095125B1/en
Expired legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24496—Foamed or cellular component
    • Y10T428/24504—Component comprises a polymer [e.g., rubber, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24562—Interlaminar spaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components

Definitions

  • the invention relates to a flat element for airborne sound absorption, consisting of a flexible, open-cell foam layer and a closed cover layer in the form of a film.
  • the invention has for its object to provide an element and a material for airborne sound absorption, the damping is improved compared to known arrangements and that can also be easily adapted to the respective requirements in a wide range.
  • the foam layer has a hump-like profiled surface at least on one side, and the flat plastic film is only selectively attached to the hump-like profile tips.
  • the film has a thickness of less than 50 p. Foil and foam are advantageously joined together by flame lamination.
  • the foam sheet 1 has a profiled surface with staggered rows of bumps 2 and 3.
  • a polyurethane foam with a bulk density of 16 to about 80 kg / m 3 can expediently be used as the material.
  • a thin plastic film 4 is then laminated onto the bump-like tips, such that the film 4 is connected to the foam 1 only at the tips 5 and 6.
  • the connection is advantageously made by Flame lamination so that no additional material, such as glue, impairs the damping.
  • the film is expediently thinner than 50 pm and can consist of polyurethane, polyethylene or PVC.
  • the film 4 is connected to the foam only at relatively small points 5 and 6 which are far apart in relation to the fastening surface. This results in a large effective area of exposed film areas, which can vibrate freely like a membrane and thereby extract energy from the impinging sound waves, so that optimal damping is achieved.
  • Such a construction dampens in particular low to medium frequencies.
  • the damping is essentially dependent on the film thickness in the sense that when the film becomes thicker, the lower frequencies are damped. In principle, attenuation to lower frequencies is possible by reinforcing the film and / or foam.
  • Another possible variation of the damping consists in changing the shape or the depth of the profile.
  • the film-like absorber or its upstream mass is optimally coupled to the foam mass with simultaneous adhesion of the film to the foam without additives.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)

Abstract

Die Erfindung betrifft ein flächiges Element zur Luftschall-Absorption, bestehend aus einer flexiblen, offenzelligen Schaumstoffschicht und einer geschlossenen Deckschicht in Form einer Folie. Dabei weist die Schaumstoffschicht (1) zumindest einseitig eine höckerartig profilierte Oberfläche (2,3) auf, auf der die ebene Kunststoff-Folie (4) nur punktuell auf den höckerartigen Profilspitzen (5, 6) befestigt ist.The invention relates to a flat element for airborne sound absorption, consisting of a flexible, open-cell foam layer and a closed cover layer in the form of a film. The foam layer (1) has, at least on one side, a hump-like profiled surface (2, 3) on which the flat plastic film (4) is only selectively attached to the hump-like profile tips (5, 6).

Description

Die Erfindung betrifft ein flächiges Element zur Luftschall-Absorption, bestehend aus einer flexiblen, offenzelligen Schaumstoffschicht und einer geschlossenen Deckschicht in Form einer Folie.The invention relates to a flat element for airborne sound absorption, consisting of a flexible, open-cell foam layer and a closed cover layer in the form of a film.

Bei diesen bekannten Luftschall-Absorptionsmaterialien wird im allgemeinen eine dünne Folie lose auf Absorptionsmaterialien aufgelegt oder aber Schaumstofflaminate werden ganzflächig mit einer Folie fest verbunden. Derartige folienkaschierte Schaumstoffe können dabei die Charakteristik von Feder-Masse-Systemen annehmen, wodurch eine relativ gute Dämpfung (Absorption) in einem relativ schmalen Frequenzbereich erreicht wird.In these known airborne sound absorption materials, a thin film is generally placed loosely on absorption materials, or else foam laminates are firmly connected to a film over the entire surface. Such foil-clad foams can take on the characteristics of spring-mass systems, as a result of which a relatively good damping (absorption) is achieved in a relatively narrow frequency range.

Entscheidend für den Absorptionsverlauf, nämlich Anstieg, Resonanzstelle und breitbandige Dämpfung ist dabei die Abstimmung zwischen Folie und Schaumstoffmasse, d.h. ihre gegenseitige.Zuordnung , Befestigung und Massenverhältnisse. Wesentlich dabei ist auch, daß keine zusätzlichen Befestigungsmittel in Form von Fremdstoffen verwendet werden, die die Dämpfung negativ beeinflussen würden.Crucial for the absorption process, namely rise, resonance point and broadband damping, is the coordination between film and foam mass, i.e. their mutual.assignment, fortification and mass ratios. It is also essential that no additional fasteners in the form of foreign substances are used that would negatively influence the damping.

Ausgehend von diesem Stande der Technik liegt der Erfindung die Aufgabe zugrunde, ein Element und ein Material zur Luftschall-Absorption zu schaffen, dessen Dämpfung gegenüber bekannten Anordnungen noch verbessert ist und daß darüber hinaus in weiten Bereich den jeweiligen Anforderungen leicht angepaßt werden kann.Based on this prior art, the invention has for its object to provide an element and a material for airborne sound absorption, the damping is improved compared to known arrangements and that can also be easily adapted to the respective requirements in a wide range.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß die Schaumstoffschicht zumindest einseitig eine höckerartig profilierte Oberfläche aufweist, und die ebene Kunststoff-Folie nur punktuell auf den höckerartigen Profilspitzen befestigt ist.To achieve this object, it is provided according to the invention that the foam layer has a hump-like profiled surface at least on one side, and the flat plastic film is only selectively attached to the hump-like profile tips.

Dabei ist es zweckmäßig, wenn die Folie eine Dicke von weniger als 50 p aufweist. Folie und Schaumstoff sind dabei vorteilhaft durch Flammkaschierung miteinander verbunden.It is advantageous if the film has a thickness of less than 50 p. Foil and foam are advantageously joined together by flame lamination.

Durch die entsprechende höckerartige Profilierung des Schaumstoffes und die nur punktuelle Befestigung der Folie wird erreicht, daß die Folie praktisch wie eine frei gespannte Membran frei schwingen kann und dadurch eine besonders gute Dämpfung gewährleistet.The corresponding hump-like profiling of the foam and the only selective attachment of the film ensures that the film can practically swing freely like a freely stretched membrane, thereby ensuring particularly good damping.

Anhand einer schematischen Zeichnung sind Aufbau und Wirkungsweise eines Ausführungsbeispiels nach der Erfindung näher erläutert. Dabei zeigen:

  • Fig. 1 einen Längsschnitt durch bin Luftschall-Absorptionselement und
  • Fig. 2 eine Aufsicht auf dieses Element mit den spe- . ziellen Verbindungspunkten.
The structure and mode of operation of an exemplary embodiment according to the invention are explained in more detail with reference to a schematic drawing. Show:
  • Fig. 1 shows a longitudinal section through airborne sound absorption element and
  • Fig. 2 is a plan view of this element with the spe-. connection points.

Wie aus Fig. 1 zu ersehen ist, weist die Schaumstoffbahn 1 eine profilierte Oberfläche mit zueinander versetzten Reihen von Höckern 2 und 3 auf. Als Material kann dabei zweckmäßigerweise ein Polyurethanschaum mit einer Rohdichte von.16 bis etwa 80 kg/m3 verwendet werden. Auf die höckerartigen Spitzen ist dann eine dünne Kunststoff-folie 4 aufkaschiert,derart, daß die Folie 4 nur an den Spitzen 5 und 6 mit dem Schaumstoff 1 verbunden ist. Die Verbindung erfolgt dabei zweckmäßigerweise durch Flammkaschierung, damit kein zusätzliches Material, wie beispielsweise Klebstoff, die Dämpfung behindert. Die Folie ist dabei zweckmäßigerweise dünner als 50 pm und kann aus Polyurethan, Polyethylen oder PVC bestehen.As can be seen from Fig. 1, the foam sheet 1 has a profiled surface with staggered rows of bumps 2 and 3. A polyurethane foam with a bulk density of 16 to about 80 kg / m 3 can expediently be used as the material. A thin plastic film 4 is then laminated onto the bump-like tips, such that the film 4 is connected to the foam 1 only at the tips 5 and 6. The connection is advantageously made by Flame lamination so that no additional material, such as glue, impairs the damping. The film is expediently thinner than 50 pm and can consist of polyurethane, polyethylene or PVC.

Wie insbesondere aus Fig. 2 zu ersehen ist, ist die Folie 4 nur an relativ kleinen und im Verhältnis zur Befestigungsfläche weit auseinanderliegenden Punkten 5 und 6 mit dem Schaumstoff verbunden. Dadurch ergibt sich eine große wirksame Fläche von freiliegenden Folienbereichen, die wie eine Membran frei schwingen können und dadurch den auftreffenden Schallwellen Energie entziehen, so daß eine optimale Dämpfung erreicht wird.As can be seen in particular from FIG. 2, the film 4 is connected to the foam only at relatively small points 5 and 6 which are far apart in relation to the fastening surface. This results in a large effective area of exposed film areas, which can vibrate freely like a membrane and thereby extract energy from the impinging sound waves, so that optimal damping is achieved.

Durch einen derartigen Aufbau werden insbesondere tiefe bis-mittlere Frequenzen gedämpft. Die Dämpfung ist dabei wesentlich abhängig von der Foliendicke in dem Sinne, daß bei dicker werdender Folie auch um so tiefere Frequenzen gedämpft werden. Grundsätzlich ist eine Dämpfung nach tieferen Frequenzen durch eine Verstärkung von Folie und/oder Schaumstoff möglich. Eine weitere Variationsmöglichkeit der Dämpfung besteht in einer Änderung der Form bzw. der Tiefe der Profilierung.Such a construction dampens in particular low to medium frequencies. The damping is essentially dependent on the film thickness in the sense that when the film becomes thicker, the lower frequencies are damped. In principle, attenuation to lower frequencies is possible by reinforcing the film and / or foam. Another possible variation of the damping consists in changing the shape or the depth of the profile.

Die besonderen Vorteile der erfindungsgemäßen Ausbildung liegen dabei darin, daß der foliehartige Absorber bzw. dessen vorgeschaltete Masse optimal zur Schaumstoffmasse unter gleichzeitiger Haftung der Folie zum Schaumstoff ohne Zusatzmittel angekoppelt ist.The particular advantages of the design according to the invention are that the film-like absorber or its upstream mass is optimally coupled to the foam mass with simultaneous adhesion of the film to the foam without additives.

Als Hauptanwendungsgebiete für derartige flächige Elemente können schallabsorbierende Auskleidungen von Ma-schinengehäusen oder Motorenkapselungen bzw. entsprechende Kabinen gelten.As main applications of such surface elements of sound absorbing linings M can a-schin housings or apply Motorenkapselungen or corresponding cabins.

Claims (3)

1. Flächiges Element zur Luftschall-Absorption, bestehend aus einer flexiblen, offenzelligen Schaumstoffschicht und einer geschlossenen Deckschicht in Form einer Folie, dadurch gekennzeichnet , daß die Schaumstoffschicht (1) zumindest einseitig eine höckerartig profilierte Oberfläche (2, 3) aufweist, und die ebene Kunststoff-Folie (4) nur punktuell auf den höckerartigen Profilspitzen (5, 6) befestigt ist.1. Flat element for airborne sound absorption, consisting of a flexible, open-cell foam layer and a closed cover layer in the form of a film, characterized in that the foam layer (1) has a hump-like profiled surface (2, 3) at least on one side, and the plane Plastic film (4) is only selectively attached to the bump-like profile tips (5, 6). 2. Flächiges Element nach Anspruch 1, dadurch gekennzeichnet, daß die Folie (4) eine Dicke von weniger als 50 pm aufweist.2. Flat element according to claim 1, characterized in that the film (4) has a thickness of less than 50 pm. 3. Flächiges Element nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Folie (4) und Schaumstoff (1) durch Flammkaschierung miteinander verbunden sind.3. Flat element according to claim 1 or 2, characterized in that film (4) and foam (1) are interconnected by flame lamination.
EP83104841A 1982-05-22 1983-05-17 Plane element for sound-wave absorption Expired EP0095125B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3219339 1982-05-22
DE3219339A DE3219339C1 (en) 1982-05-22 1982-05-22 Flat element for airborne sound absorption

Publications (3)

Publication Number Publication Date
EP0095125A2 true EP0095125A2 (en) 1983-11-30
EP0095125A3 EP0095125A3 (en) 1984-09-26
EP0095125B1 EP0095125B1 (en) 1987-05-20

Family

ID=6164288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104841A Expired EP0095125B1 (en) 1982-05-22 1983-05-17 Plane element for sound-wave absorption

Country Status (5)

Country Link
US (1) US4469736A (en)
EP (1) EP0095125B1 (en)
JP (1) JPS58209792A (en)
DE (2) DE3219339C1 (en)
ES (1) ES272335Y (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113375A (en) * 1983-11-24 1985-06-19 Mitsubishi Plastics Ind Ltd Floppy disk jacket
IN170733B (en) * 1986-06-26 1992-05-09 Burlington Industries Inc
US4690847A (en) * 1986-06-26 1987-09-01 Burlington Industries, Inc. Cold weather garment structure
US4863791A (en) * 1987-04-06 1989-09-05 United Technologies Automotive, Inc. Sound absorption in foam core panels
FR2675936B1 (en) * 1991-04-24 1993-08-20 Noisetec Sa SOUNDPROOFING DEVICE, PARTICULARLY FOR VENTILATION SYSTEMS.
DE9110552U1 (en) * 1991-08-26 1992-12-24 Irbit Research + Consulting Ag, Freiburg/Fribourg Engine compartment capsule element
JPH081114U (en) * 1991-11-20 1996-07-02 株式会社ダイウレ Sound insulation
US5858283A (en) * 1996-11-18 1999-01-12 Burris; William Alan Sparger
JPH1167402A (en) * 1997-08-08 1999-03-09 Harness Sogo Gijutsu Kenkyusho:Kk Sound absorbing material, and cable reel provided with the sound absorbing material
GB9727469D0 (en) * 1997-12-30 1998-02-25 Sugden Kurt D Fabric material
DE10358595A1 (en) * 2003-12-15 2005-07-21 Cellofoam Gmbh & Co. Kg Sound-absorbing sheet-like foam material
DE10358593A1 (en) * 2003-12-15 2005-07-14 Cellofoam Gmbh & Co. Kg Sound-absorbing sheet-like foam material
JP2005283703A (en) * 2004-03-29 2005-10-13 Inoac Corp Sound absorbing material
DE502008002271D1 (en) 2007-10-23 2011-02-24 Retro Flex Ag Porous sound insulation films, sound insulation system and method for producing a porous soundproofing foil
CN103069086B (en) * 2010-07-13 2015-11-25 贝尔马克斯声学有限公司 Multilayer acoustic panel
GB2486714A (en) * 2010-12-23 2012-06-27 Levolux At Ltd Acoustic louvre having sound energy absorption element encased by a watertight element
WO2014055991A1 (en) * 2012-10-05 2014-04-10 Leonard Michael R Layered insulation system
US9362799B2 (en) * 2014-04-14 2016-06-07 Cummins Power Generation Ip, Inc. Acoustic covering for a generator set enclosure with pressure sensitive adhesive
RU2593401C1 (en) * 2015-02-25 2016-08-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный архитектурно-строительный университет" Sound-absorbing panel
RU185081U1 (en) * 2017-07-12 2018-11-21 Общество с ограниченной ответственностью "ШиКор" SOUND INSULATION MATERIAL

Citations (3)

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US2984312A (en) * 1959-04-24 1961-05-16 Owens Corning Fiberglass Corp Acoustical wall board
DE2246621A1 (en) * 1972-09-22 1974-03-28 Albert Schrey Sound insulating panel of soft polyurethane foam - resistant to mechanical stress, esp ball impact, for gymnasium use
GB1579897A (en) * 1976-06-03 1980-11-26 Becker Ab Wilheim Sound absorber

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US3360423A (en) * 1961-09-21 1967-12-26 Gen Tire & Rubber Co Flexible structural foam sandwich construction
US3356562A (en) * 1964-06-22 1967-12-05 Cincinnati Ind Inc Materials and methods for the production of stereotype mats
JPS5112856B1 (en) * 1967-05-09 1976-04-22
US3712846A (en) * 1971-06-23 1973-01-23 Carpenter L & Co Acoustical panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984312A (en) * 1959-04-24 1961-05-16 Owens Corning Fiberglass Corp Acoustical wall board
DE2246621A1 (en) * 1972-09-22 1974-03-28 Albert Schrey Sound insulating panel of soft polyurethane foam - resistant to mechanical stress, esp ball impact, for gymnasium use
GB1579897A (en) * 1976-06-03 1980-11-26 Becker Ab Wilheim Sound absorber

Also Published As

Publication number Publication date
DE3219339C1 (en) 1983-02-03
EP0095125A3 (en) 1984-09-26
ES272335Y (en) 1984-07-01
EP0095125B1 (en) 1987-05-20
JPS58209792A (en) 1983-12-06
JPH0444279B2 (en) 1992-07-21
DE3371615D1 (en) 1987-06-25
US4469736A (en) 1984-09-04
ES272335U (en) 1983-11-16

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