WO2001057301A1 - Materiau fibreux a effet acoustique - Google Patents

Materiau fibreux a effet acoustique Download PDF

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Publication number
WO2001057301A1
WO2001057301A1 PCT/EP2001/001192 EP0101192W WO0157301A1 WO 2001057301 A1 WO2001057301 A1 WO 2001057301A1 EP 0101192 W EP0101192 W EP 0101192W WO 0157301 A1 WO0157301 A1 WO 0157301A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibrous layer
layer according
layer
hollow bodies
thickness
Prior art date
Application number
PCT/EP2001/001192
Other languages
German (de)
English (en)
Inventor
Dieter Schuster
Original Assignee
Sai Automotive Sal 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 Sai Automotive Sal Gmbh filed Critical Sai Automotive Sal Gmbh
Priority to AU2001237364A priority Critical patent/AU2001237364A1/en
Publication of WO2001057301A1 publication Critical patent/WO2001057301A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/55—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
    • 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
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • 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
    • G10K11/165—Particles in a matrix
    • 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
    • E04B1/76—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 heat only
    • E04B2001/7687—Crumble resistant fibrous blankets or panels using adhesives or meltable fibres
    • 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
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling

Definitions

  • the invention relates to a fibrous layer for use as a noise-reducing lining in vehicle interiors, for example for use as a floor covering, headlining or trunk lining.
  • multilayer sound insulation has been used in the automotive industry for a long time. These are primarily designed as a mass / spring system, in which the spring layer consists of non-woven fabrics or soft foam and the mass is formed by a compact, mostly containing bitumen heavy layer.
  • Floor insulation and trunk linings mostly still have a carpeting on the visible side, which can also contribute to improving the acoustics.
  • Such layered composite systems are naturally difficult.
  • the basis weight of such an insulation and damping system is several re kilograms per square meter. Modifications to the spring / mass / system have been proposed to reduce weight, if possible without loss of acoustic effectiveness.
  • EP-A-0 334 178 discloses designing the spring layer from soft foam and the mass layer from the same material, the mass layer area being consolidated by fleece or cut foam inserts and being compacted almost airtight. As usual, this system also includes a decorative cover like a layer of carpet. According to WO 98/18657, the heavy layer of the layer composite can be replaced by a microporous stiffening layer with a low basis weight, with the result of improved acoustic properties.
  • the spring layer is either an open-pore lightweight foam or a likewise open-pore fiber fleece made from natural organo or mineral fibers, possibly a fleece made from mixtures of these fibers.
  • the open porosity also causes a certain damping of the high frequencies of the Storschalles if the decor cover is also open port.
  • the basis weight of the fiber layer is thus only about a fourth of the basis weight of the commercial product, with only about a third of its thickness. Furthermore, it was found that in the frequency range between 400 Hz and 1 KHz, the fiber layer examined with hollow bodies had significantly better absorption values than the commercial product. Since several square meters of insulation material are usually used in a vehicle, the layered composite material according to the invention results in considerable weight and space savings potential.
  • the thickness of the nonwoven fabric can be less than 20 mm, preferably in the range between 5 and 10 mm.
  • the proportion of the hollow body in the volume of the entire fiber layer is at least 10%.
  • the hollow bodies preferably have a spherical shape. Balls of this type are available as expandable precursors, for example under the trade name Expancel from Akzo (these are small polymer particles which are filled with a gas which expands when heated). Dispersed in water, they can be introduced into a fleece made of 2-component polyester fibers (bico fibers), for example, by soaking or spraying.
  • Such nonwovens can be thermally consolidated, ie the outer component of the bico fibers, which has a lower melting point than the core fibers. it melts during thermal consolidation and glues the fibers of the fleece at their crossing points. This thermal process can also be used to inflate the unexpanded preliminary product and thus produce the elastic hollow bodies in the nonwoven fabric.
  • the spherical shape of the hollow bodies is not indispensable for the acoustic effectiveness: elongated hollow bodies, for example in the form of hollow fiber sections closed at the ends, serve the same purpose.
  • the good acoustic effectiveness of the fibrous layers with embedded hollow bodies enables a very simple layer composite in many cases: A uniform core made of the fibrous material is arranged between two cover layers, of which the back can be, for example, a moisture barrier, while the visible lamination after stress and / or aesthetic criteria is chosen. In many cases, the visible side is, for example, carpet lamination.
  • such a fibrous layer can also be used as a component in more complicated sound absorption systems, for example as a spring layer in a mass / spring system. In this case, the acoustic effectiveness of the composite system is further improved.
  • thermally bonded polyester fleece explains a manufacturing process that is particularly favorable in terms of production technology.
  • Other fibers from the organic mineral and bio sector, with which nonwovens can be formed, are just as suitable for realizing the invention as mixed fiber nonwovens. Possibly. thermal bonding is not necessary and can be replaced by needling.
  • Expandable precursors can also be used in such nonwovens can be developed into corresponding hollow bodies by thermal post-treatment of the needled fleece.
  • Fig. 1 shows a schematic representation of a
  • Fig. 2 shows the absorption curves of a commercial product and a fibrous layer with embedded hollow bodies.
  • 1 denotes a volume section of a nonwoven fabric.
  • 2 are the biko-polyester fibers which are glued together at the crossing points 5 by thermal solidification.
  • the spherical cavities 3 are enclosed by the elastic polymer shells 4 forming the hollow bodies, which accumulate between the fibers 2 and are also selectively connected to the outer shell of the fibers 2 during thermal consolidation after expansion.
  • the diameter of the hollow body is between approximately one hundredth of a millimeter and one millimeter; it is primarily dependent on the fiber thickness in which the hollow bodies are to be embedded. Diameters between 0.02 mm and 0.1 mm are preferred.
  • 6 denotes the area-related frequency curve of a nonwoven fabric with embedded elastic hollow bodies (thickness: 4.5 mm, area weight: 300 g / m 2 ), which corresponds to the corresponding curve for the commercially available insulation material Sommold (thickness: 15 mm, area chengmeaning: 1200 g / m 2 ), which is denoted by 7.
  • the sensation-relevant fre- frequency ranges between 0.4 KHz and 1 KHz the nonwoven fabric with hollow bodies is clearly superior to the commercial product, despite its reduced thickness and, above all, its lower basis weight, in the range between 2 KHZ and 5 KHz, i.e. in the range for the
  • the fiber fleece does not have as great an absorbency as the commercial product, but still values that guarantee good speech intelligibility in the interior with sufficient reduction of the noise level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Textile Engineering (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Multimedia (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

La présente invention concerne une couche de matériau fibreux (1), destinée à être utilisée comme revêtement d'insonorisation dans des habitacles de véhicules, dans laquelle est noyée une pluralité de corps creux élastiques (4). Les dimensions des corps creux sont comprises entre le centième de millimètre et le millimètre, de préférence de 0,02 à 0,1 mm, et ils représentent en volume au moins 10 % du volume de la couche de matériau fibreux. La couche de matériau fibreux a également une masse volumique de 150 kg/m3 maximum.
PCT/EP2001/001192 2000-02-03 2001-02-05 Materiau fibreux a effet acoustique WO2001057301A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001237364A AU2001237364A1 (en) 2000-02-03 2001-02-05 Acoustically effective fibrous material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10004859A DE10004859A1 (de) 2000-02-03 2000-02-03 Akustisch wirksamer Schichtverbundwerkstoff
DE10004859.5 2000-02-03

Publications (1)

Publication Number Publication Date
WO2001057301A1 true WO2001057301A1 (fr) 2001-08-09

Family

ID=7629773

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/001192 WO2001057301A1 (fr) 2000-02-03 2001-02-05 Materiau fibreux a effet acoustique

Country Status (3)

Country Link
AU (1) AU2001237364A1 (fr)
DE (1) DE10004859A1 (fr)
WO (1) WO2001057301A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003069030A1 (fr) * 2002-01-18 2003-08-21 Honeywell International Inc. Support fibreux de non tisse en forme charge de microspheres de polymere expanse
EP2444537A1 (fr) * 2010-09-13 2012-04-25 eswegee Vliesstoff GmbH Non-tissé pour applications acoustiques ayant des caractéristiques d'absorption du bruit améliorées
DE102016101816A1 (de) * 2016-02-02 2017-08-03 Claus Schierz Schichtmaterial
CN117107934A (zh) * 2023-10-24 2023-11-24 中国建筑西南设计研究院有限公司 一种双孔隙吸声增强复合材料及其制备方法和应用

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20004753U1 (de) 2000-03-15 2001-07-26 Lear Corp Gmbh & Co Kg Innenverkleidungsteil
DE10248191A1 (de) * 2002-10-16 2004-05-06 Hepp, Rainer, Dr. Vorrichtung zur Absorbtion mechanischer Energie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524529A (en) * 1982-08-27 1985-06-25 Helmut Schaefer Insole for shoes
US4595622A (en) * 1984-03-07 1986-06-17 J. H. Bemecke Gmbh Felting
US4820575A (en) * 1985-11-15 1989-04-11 Koelzer Klaus K Reinforcing material
US5391424A (en) * 1991-02-05 1995-02-21 Kolzer; Klaus Lightweight filler and a process for its manufacture
US5571592A (en) * 1993-09-21 1996-11-05 Mcgregor; Gordon L. Puffed insulative material
US5698289A (en) * 1994-11-15 1997-12-16 Kolzer; Klaus Compressed light filler material for reinforced duroplastic composites and process for producing it

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3809980C2 (de) * 1988-03-24 1998-02-19 Stankiewicz Gmbh Aufbau zur Schallisolation, Verfahren zu seiner Herstellung und seine Verwendung
WO1998018656A1 (fr) * 1996-10-29 1998-05-07 Rieter Automotive (International) Ag Assemblage de materiaux ultraleger, multifonctionnel et insonorisant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524529A (en) * 1982-08-27 1985-06-25 Helmut Schaefer Insole for shoes
US4595622A (en) * 1984-03-07 1986-06-17 J. H. Bemecke Gmbh Felting
US4820575A (en) * 1985-11-15 1989-04-11 Koelzer Klaus K Reinforcing material
US5391424A (en) * 1991-02-05 1995-02-21 Kolzer; Klaus Lightweight filler and a process for its manufacture
US5571592A (en) * 1993-09-21 1996-11-05 Mcgregor; Gordon L. Puffed insulative material
US5698289A (en) * 1994-11-15 1997-12-16 Kolzer; Klaus Compressed light filler material for reinforced duroplastic composites and process for producing it

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003069030A1 (fr) * 2002-01-18 2003-08-21 Honeywell International Inc. Support fibreux de non tisse en forme charge de microspheres de polymere expanse
EP2444537A1 (fr) * 2010-09-13 2012-04-25 eswegee Vliesstoff GmbH Non-tissé pour applications acoustiques ayant des caractéristiques d'absorption du bruit améliorées
DE102016101816A1 (de) * 2016-02-02 2017-08-03 Claus Schierz Schichtmaterial
CN117107934A (zh) * 2023-10-24 2023-11-24 中国建筑西南设计研究院有限公司 一种双孔隙吸声增强复合材料及其制备方法和应用
CN117107934B (zh) * 2023-10-24 2024-01-23 中国建筑西南设计研究院有限公司 一种双孔隙吸声增强复合材料及其制备方法和应用

Also Published As

Publication number Publication date
DE10004859A1 (de) 2001-09-27
AU2001237364A1 (en) 2001-08-14

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