EP0820623A1 - Element d'amortissement plat magnetisable et adhesif s'utilisant notamment dans des mats antisoniques - Google Patents

Element d'amortissement plat magnetisable et adhesif s'utilisant notamment dans des mats antisoniques

Info

Publication number
EP0820623A1
EP0820623A1 EP96910931A EP96910931A EP0820623A1 EP 0820623 A1 EP0820623 A1 EP 0820623A1 EP 96910931 A EP96910931 A EP 96910931A EP 96910931 A EP96910931 A EP 96910931A EP 0820623 A1 EP0820623 A1 EP 0820623A1
Authority
EP
European Patent Office
Prior art keywords
damping element
adhesive
element according
magnetic particles
magnetizable
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
EP96910931A
Other languages
German (de)
English (en)
Other versions
EP0820623B1 (fr
Inventor
Thomas Ruhe
Max Wagner
Stefan Lahner
Manfred Roller
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.)
Faist Automotive GmbH and Co KG
Original Assignee
M Faist 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 M Faist GmbH and Co KG filed Critical M Faist GmbH and Co KG
Publication of EP0820623A1 publication Critical patent/EP0820623A1/fr
Application granted granted Critical
Publication of EP0820623B1 publication Critical patent/EP0820623B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • Magnetizable flat damping element and adhesive especially for use with anti-drumming mats
  • the invention relates to a magnetizable flat damping element of the type mentioned in the preamble of claim 1 and to an adhesive.
  • Such magnetizable damping element are already known (DE-37 11 810 AI, DE-AS 12 09 319, US-PS 4 010 818). They are used in particular as so-called "anti-drumming foils" in motor vehicle technology for the anti-drumming of the sheets covered with them, in particular body panels, and also for the purpose of damping structure-borne noise.
  • magnetisable particles barium ferrites are arranged together with bitumen in the damping or insulating insulation layer, which has to fulfill the "deadening task".
  • the underside of the insulating layer containing the magnetizable particles is provided with an adhesive layer which contains a hotmelt, ie a hate which becomes adhesive when heat is applied, or a pressure sensitive adhesive. ie has a self-adhesive adhesive.
  • an adhesive layer which contains a hotmelt, ie a hate which becomes adhesive when heat is applied, or a pressure sensitive adhesive. ie has a self-adhesive adhesive.
  • Magnetic tape composite layers with non-magnetic foils are also known.
  • the proportion of magnetizable particles, namely barium ferrite, in the flat damping element is more than 50% by weight. percent, as a result of which the acoustic properties with regard to sound insulation or sound absorption are impaired by the bitumen layer.
  • the invention is based on the object of improving a magnetizable flat damping element of the type mentioned at the outset such that it is likewise simple and inexpensive to produce! is simple and easy to permanently attach to the object in question and in addition, the damping or insulating properties are essentially not affected.
  • the invention with regard to the magnetizable flat damping element is characterized in claim 1. Thereafter, the magnetizable particles are not integrated in the insulation layer, but in the adhesive layer using binders. Because the layer relevant for the insulation and damping purposes is no longer "loaded” with magnetizable particles, the acoustic properties can be better controlled, which is particularly beneficial for a broader frequency spectrum of the waves to be damped or damped. In addition, however, it has also been shown that by introducing the magnetizable particles, only one additional important layer is added to the adhesive layer Advantage. The magnetic effectiveness is significantly improved, although less and even less expensive magnetizable material can be used. When comparing with the thickness, there is a quantitative advantage with regard to the total amount of ferrite.
  • barium and / or strontium ferrite are preferred.
  • iron oxide powders such as flfFe “0_, and / or FeC” Fe “0, can also be used.
  • the average particle size is expediently in the narrow range between 0.1 and 0.4 mm without too great a scatter.
  • the adhesive layer It is advisable to choose a small thickness for the adhesive layer.
  • a layer thickness between 0.5 and 1.5 mm is preferred.
  • the usual layer thickness margin that is not provided with magnetic particles can be maintained. Since there are no magnetizable particles embedded therein, it is also not necessary to compensate for the impairment of the insulating / damping effect by the magnetizable particles by increasing the layer thickness. In this respect, the total thickness of the magnetizable flat damping element is also comparatively small, so that it is also possible to lay it in only narrow spaces without significantly compressing the damping element.
  • a further part of the invention is characterized in claim 13, according to which magnetic particles are dispersed in an adhesive according to the invention, which is used in particular in anti-drumming mats, in a binder which is itself particularly effective as an adhesive and / or contains adhesives.
  • this adhesive is a liquid mass in the form of a dispersion, which, when heated to a certain degree, dries between 20 and 180 ° C under the influence of air, but then still has sufficient adhesive or adhesive properties.
  • this pressure-sensitive adhesive in conjunction with a rigid carrier (e.g.
  • a bitumen-impregnated cardboard, a metal foil and / or coated paper or the like, in particular made of aluminum) has a very high level of structure-borne noise absorption, which is due to the viscoelastic behavior of the adhesive. That Here one can achieve a very good broadband of the so-called loss factor, which e.g. is not possible with conventional magnetic foils due to the high ferrite content.
  • the adhesive according to the invention allows counter stands in which both the adhesive and the magnetic adhesive effect are used together. This makes it possible to make objects magnetizable when the adhesive is attached to the object. If the adhesive effect is undesirable, the proportion or type of binder can be selected so that after the adhesive mass has been applied, curing takes place in such a way that the "magnet" sticks well to the object and to the other - free one - Side of this magnetizable coating of the object but a surface that is no longer adhesive remains.
  • a preferred example of the use of the adhesive according to the invention is the coating of foam, for example polyurethane foam, which can be magnetically applied as a mat or layer, for example on the headlining in the motor vehicle. Separation is also very easy for better recycling.
  • the adhesive according to the invention is in particular pourable, rollable and / or doctorable. It is expediently constructed on a solvent-free aqueous dispersion basis.
  • Resin "tackifier” 5.0 - - 30.0% by weight
  • Crosslinking agent 0.0 ⁇ - 0.9% by weight
  • Auxiliaries 0.0 - 0.9% by weight
  • ferrites e.g. to coat lithium stearate, which promotes drying.
  • lithium stearate which promotes drying.
  • Pure acrylate which can also be replaced by carboxyl group-containing acrylic ester copolymers or the like, and after drying, self-adhesive or adhesive material.
  • Polyurethane-based thickeners lead to the viscosity desired for processing.
  • Products based on paraffinic petroleum products are used as defoamers.
  • biostabilizers are used.
  • As an aid e.g. Sodium gluconate used.
  • crosslinking agents such as isocyanate, are used to bind part of the water.
  • a non-blocking dispersion after drying such as acrylate, vinyl acetate copolymer, propionate or the like.
  • the mass can contain thickeners, defoamers and bio-stabilizers in addition to the magnetizable ones « , ⁇ ⁇ ⁇ « ⁇ ⁇ « PCT / EP96 / 01326
  • the adhesive composition should remain liquid or pasty at room temperature before being applied to the objects in question.
  • FIG. 1 shows a schematic partial section through the magnetizable and flat damping element according to the invention
  • Fig. 2 shows a section of part of the adhesive layer or a layer of adhesive
  • FIG 3 shows a schematic cross section through the use of the damping element according to the invention in a car body panel.
  • the damping element 1 has an insulating layer 5 that dampens or dampens the acoustic waves, e.g. following material on:
  • this insulation layer 5 On the underside of this insulation layer 5 there is an adhesive layer 2, which is provided with magnetizable particles 3.
  • the magnetizable particles 3 made of barium ferrite and / or strontium ferrite and / or iron oxide powder in the adhesive layer 2 are finely dispersed in the binder 4, which at the same time retains self-adhesive properties after drying.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Laminated Bodies (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne un élément d'amortissement plat magnétisable, qui comporte une couche isolante (5) qui amortit ou arrête les ondes acoustiques, une couche adhésive (2) liée à la précédente et servant à fixer par collage l'élément d'amortissement à d'autres objets (6), et des particules (3) magnétisables, contenues dans ledit élément d'amortissement. Les particules magnétisables sont intégrées dans la couche adhésive (2) à l'aide d'un liant (4).
EP96910931A 1995-04-11 1996-03-26 Element d'amortissement plat magnetisable Expired - Lifetime EP0820623B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29506265U 1995-04-11
DE29506265U DE29506265U1 (de) 1995-04-11 1995-04-11 Magnetisierbares flächiges Dämpfungselement und Klebstoff insbesondere zur Anwendung bei Entdröhnmatten
PCT/EP1996/001326 WO1996032709A1 (fr) 1995-04-11 1996-03-26 Element d'amortissement plat magnetisable et adhesif s'utilisant notamment dans des mats antisoniques

Publications (2)

Publication Number Publication Date
EP0820623A1 true EP0820623A1 (fr) 1998-01-28
EP0820623B1 EP0820623B1 (fr) 2001-08-29

Family

ID=8006767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96910931A Expired - Lifetime EP0820623B1 (fr) 1995-04-11 1996-03-26 Element d'amortissement plat magnetisable

Country Status (10)

Country Link
US (1) US5984043A (fr)
EP (1) EP0820623B1 (fr)
JP (1) JPH11505623A (fr)
KR (1) KR19980703688A (fr)
AT (1) ATE205008T1 (fr)
CZ (1) CZ295897A3 (fr)
DE (2) DE29506265U1 (fr)
HU (1) HUP0100359A2 (fr)
PL (1) PL322282A1 (fr)
WO (1) WO1996032709A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20011742A1 (it) * 2001-08-09 2003-02-09 Ilpea Ind Spa Metodo per formare un foglio o pannello smorzante delle vibrazioni, ed articoli con esso ottenuti
US7094478B1 (en) 2002-09-13 2006-08-22 Material Sciences Corporation, Engineered Materials And Solutions Group, Inc. Magnetic damping
WO2005042857A2 (fr) * 2003-09-26 2005-05-12 Magnum Magnetics Corporation Traitement de paroi d'attenuation sonore magnetique
US7172800B2 (en) * 2003-11-03 2007-02-06 Material Sciences Corporation Sheet molding compound damper component, and methods for making and using the same
US7199970B2 (en) * 2003-11-03 2007-04-03 Material Sciences Corporation Damped disc drive assembly, and method for damping disc drive assembly
KR20070114288A (ko) * 2005-03-17 2007-11-30 가부시키가이샤 쇼와 전선 디바이스 테크놀로지 흡음재 및 이를 이용한 구조체
CA2936255A1 (fr) 2015-07-16 2017-01-16 Hydra Heating Industries, LLC Dispositifs de fermeture magnetique destines a l'isolation des tuyaux
US9868268B2 (en) 2015-08-06 2018-01-16 Hydra Heating Industries, Llc. Magnetic clasps for insulation
US9914284B2 (en) 2015-08-06 2018-03-13 Hydra Heating Industries, LLC Magnetic insulation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1209319B (de) * 1963-06-06 1966-01-20 Matec Holding Verfahren und Mittel zur Herstellung von UEberzuegen auf Metallflaechen zwecks Entdroehnung und Abdichtung
CH418664A (de) * 1963-06-06 1966-08-15 Matec Holding Ag Entdröhnungs- und Abdichtungsmittel
DE1594052A1 (de) * 1964-08-11 1969-09-04 Interkeller Ag Verfahren zur Herstellung eines UEberzuges aus einer schmelzbaren bituminoesen Masse auf einer Flaeche mit ferromagnetischen Eigenschaften
US3424270A (en) * 1965-05-12 1969-01-28 Us Plywood Champ Papers Inc Viscoelastic sound-blocking material with filler of high density particles
US4010818A (en) * 1975-06-10 1977-03-08 E. I. Du Pont De Nemours And Company Flexible noise barrier material
JPS60166545A (ja) * 1984-02-10 1985-08-29 Fuji Heavy Ind Ltd 熱融着性防振シ−トの取付方法
DE3711810A1 (de) * 1987-04-08 1988-10-27 Ruetgerswerke Ag Magnetisch haftende daempfungsfolie
US5300355A (en) * 1991-05-31 1994-04-05 Nichias Corporation Vibration damping material
JPH0835538A (ja) * 1994-07-25 1996-02-06 Lintec Corp 制振・補強シート

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9632709A1 *

Also Published As

Publication number Publication date
KR19980703688A (ko) 1998-12-05
EP0820623B1 (fr) 2001-08-29
HUP0100359A2 (hu) 2001-06-28
WO1996032709A1 (fr) 1996-10-17
DE29506265U1 (de) 1996-08-14
PL322282A1 (en) 1998-01-19
CZ295897A3 (cs) 1998-05-13
ATE205008T1 (de) 2001-09-15
US5984043A (en) 1999-11-16
DE59607584D1 (de) 2001-10-04
JPH11505623A (ja) 1999-05-21

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