[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CA2319355A1 - Multilayer insulation element - Google Patents

Multilayer insulation element Download PDF

Info

Publication number
CA2319355A1
CA2319355A1 CA002319355A CA2319355A CA2319355A1 CA 2319355 A1 CA2319355 A1 CA 2319355A1 CA 002319355 A CA002319355 A CA 002319355A CA 2319355 A CA2319355 A CA 2319355A CA 2319355 A1 CA2319355 A1 CA 2319355A1
Authority
CA
Canada
Prior art keywords
layer
insulating element
layers
cellular material
element according
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.)
Abandoned
Application number
CA002319355A
Other languages
French (fr)
Inventor
Rainer Arndt
Hans-Rudolf Czerny
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.)
Illbruck GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2319355A1 publication Critical patent/CA2319355A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/88Insulating elements for both heat and sound
    • E04B1/90Insulating elements for both heat and sound slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B2001/742Use of special materials; Materials having special structures or shape
    • E04B2001/747Corrugated materials
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, 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
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8461Solid slabs or blocks layered
    • E04B2001/8471Solid slabs or blocks layered with non-planar interior transition surfaces between layers, e.g. faceted, corrugated
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, 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
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8476Solid slabs or blocks with acoustical cavities, with or without acoustical filling

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Microwave Amplifiers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention relates to a multilayer insulation element (1) comprising a non-woven material layer (4, 6) and a cellular material layer (5). Said layers are arranged on top of each other. According to the invention, the cellular material layer (5) consists of uneven, three-dimensional structured polyimide cellular material in order to meet the requirements such as high sound absorption or sound insulation and/or high heat insulation and/or low liquid water formation at high temperature gradients and/or low surface weight and/or good handleability as fitting elements.

Description

2.FUG.2002 14:22 RN'~IRLTSKRNZ'~EI RIEDER & P1RTNER NR.24S S.2i'_2 Multi-la er insulating elea~ient The invention relates in the first instance to a multi-layer insulating element with a layer of nonwoven material and a layer of cellular material, which are provided in layers arranged one on top of the other.
Insulating elements of this type are already known in various forms. However, these are not satisfactory in every respect with regard to various requirements, which are generally to be accomplished in combination. Anong these requirements are high sound absorption and/or sound insulation, which in particular allows curve characteristics with regard to a sound absorption curve and a sound-insulation measuring curve in a frequency band between 10 and 20, 000 Hz. Further requirements are, a high 'thermal insulation and a low level of liquid water formation when there are great tempera~ure gradvent~~ and great atmospheric humidity grad=ents, iy at all possible also combined with comparatively low weights per unit area and good suitability for handling as a fitted element.
The invention is therefore concerned with the technical problems involved in specifying an insulating element of the type in question which is distinguished by meeting one or more of the aforementioned requirements t~ a high degree o~ satisfaction.
These technical problems are initially and essentia'.:ly solved by the subject-matter of Claim 1, based on the idea that the layer of cellular material consists of non-flats, three-dimensionally structured polyimide foam. As a result of this configuration, a layer of the insulating element which is distinguished by low weight with a comparatively large volume is created. This layer of polyimide foam is structured in i such a way that, when. viewed in the extent of its plane, .t extends in a Third dimension, i.e. toward the 1 Translator's Note: optionally "non-planar" or "undulating".
FUG-02-2020 09:32 -49 202 732057 92~ P.02 2.AUG.2a00 14:23 RNwRLTSKRNZLEI RIEDER & PRRTNER NR.243 S.3i12 WO 00/3943 pCT/Ep99/09509 layer of nonwoven material.arranged above this layer or away from the layer of nonwoven material arranged below this layer, for example by means of elevations in certain. regions. These may be further formed for example by wave-like or pit-like elevations or formations. In this respect, a mould-foamed polyimide foam can also be used. The non-flat structure of the polyimide foam, formed on an upper side, may also be reproduced in negative on the underside, so that according to the invention both surfaces are non-flat, three-dimensionally structured, to increase the overall surface area of the layer of cellular material.
Furthermore, the invention also relates to a multi-layer insulating element with two layers of cellular material which are provided in layers arranged one on too of tl:e other, the invention being based here on the idea that one layer of cellular material consists of non-flat, three-aimensionayly structured polyimide oam. Irrespective o' the ~'~ayered structure, which is c0 a matter of choice, that is a layer o.nonwoven material with a layer of cellular material or two layers of cellular material, in a preferred configuration of the subject-matter of the invention it is provided that the layer of cellular material consists of a cut foam. It is particularly preferred in this respect that the layer of cellular material runs in a zigzag fo~m, the path it follows extending in the plane of the layer of cellular material.
Accordingly, the elevations formed by the zigzag form extend in tre direction of the layer arranged above it and/or below it. As a result, the layer (layer of nonwoven material or further layer of cellular n,ater~~al) arranged above and/or below the layer of cellular mater_al formed according to the invention is spaced from the ':.ayer of polyimide foam, cavities approximately v-shaped in cross section being formed in the interstices of the zigzag form. It proves to be particularly advantageous in this respect for a desired sound absorption behaviour to be set by means of the PUG-02-2000 08:33 +4S 202 732057 92i P.03 '~ 2.FUG.2000 14:25 ANWALTSKANZLEI RIEDER & PARTNER NR.245 S.4i12 g _ thickness ard/er the angular path of the zigzag webs relative to the perpendicular. As a consequence of this configuration, the scund absorption behaviour can be pre-set dur,_r.g the production of the layer of ce'_lular material according to the invention by choosing the material thickness and/or the path followed by the zigzag structure. In a further embodiment of the subject-matter of the invention, it is provided that the layer of cellular material is covered on the uppsr side and underside by a layer of nonwoven material_ This may in each case be a needled.
condensed or mechanically compacted nonwoven.
urthermore, melofil fibres may also be used here in a proportion of 10-'70~, preferably 50~. It is also conceivable to form the upper layer of nonwoven :~.aterial, preferably facing the noise source, as a r~.elt-blown nonwoven and to form the lower layer as a thermally bonded volume r.onwoven. Furthermore, there is also the possib~.'~,yt~r or using a blend of melamine 2C fibres and basofl fibres for producing a three-dimensional framework. In addition, with an arrangement of at least two layers of cellular material lying one on top of the other, there is (the possibility] of forming each layer of cellular material prom polyimide, the non-flat, three-dimensionally structured, preferably zigzag-structured layer of polyimide foam being covered on the upper side and underside with a M at layer of polyimide foam that is relatively thin in relation to the layer of structured 3C cellular material. In addition, two layers of cellular material :nay also be provided, with a layer of nonwoven material provided between them. Preferred ir_ this respect is a configuration in which both layers of cellular material are designed in a way corresponding 3~ to the configurations described above in a non-flat, three-dimensionally structured manner as layers of polvimide foam and the interposed layer of nonwoven material is a melt-blown nonwoven. Tre layers of the insulating element a.re, furthermore, sheathed by a AUG-02-2000 0G:33 +49 202 ?3205? 92X P.04 2.AUG.2a02 14:25 ANWALTSKANZLEI RIEDER & PARTNER NR.245 S.5~12 _ q Film. Tn particular, this sheathing film comprises two =~llm layers, which are further preferred to be outer layers. These fil~,; layers sheath the layers of insulation arranged one on top of the other to form a compact, mufti-layer insulating element. The film layers may also be additionally provided as intermediate layers. Tt is further preferred for the cuter films to be edge-welded, but all or some of the layers of nonwoven and/or cellular material may be integrated into the weld, for instance by a layer of nonwoven and/or cellular material edge-compressed to virtually nethirg. Such edge compression may also be used for shaping the component. Fastening elements may also be integrated into such a weld. The joining together of the outer films is suitably provided in th_s case by the complete composite structure being :geld together just by the edge-welded films and possibly layers ef nonwoven and/or cellular material.
too adhesive bonding, l~aminaticn or the like ef 2~ individual layers is required and is preferably also not provided. The payers arQ simply laid one on top of 'he ether - at least outside the edge region. This produces as it were a cushion with a sheath formed by the outer films. Partial compressed portions, brought about by welding operations, in particular in the edge region, can play a part in accommodating fastening elements and/or reinforcements of the component. The plurality of layers !layers ef nonwoven and/or cellular material) lead to a kind of swollen filling. It is 3C also of signirica:~ce for the sub=ect-matter that the formation of liqu~ld water in the component is reduced.
The films used, both tl~_e outer films and possibly also intermediate films, have different water permeability, it being preferred for water-vapour-permeable membrane films to be used. Preferably used are also films which have direction-active water vapour permeabilities.
Films which have moisture-dependent and/or temperature-dependent water vapour permeabilities may also be used.
FLrthermore, these films may also be fibre-reinforced, AUG-02-2000 0x:34 +49 202 732057 92i P.05 2.AU6.2a00 14:24 ANWALTSKANZLEI RIEDER & PARTNER NR.24S S.6i12 =t being further preferred in this respect for these fibres to be provided on the inside of the film.
The invention is~ further explained in mere detail be'~ow w;th reference to the attached drawing, w~:_ch however merely represents one exemplary e~.bodiment and in which:
Figure 1 shows a par~ially sectioned perspective representation of a mufti-layer insulating element according to the invention;
1C Figure 2 shows a greatly enlarged representation o' the section along the line II-II in Figure i.
With reference to Figure 1, an insulating element 1 which comprises a lower outer film 2 and an upper outer film 3 and three middle layers 4, 5 and 6 is represented.
:he layers of nonwoven material 4 and 6, of a flat form, are formed from identical or non-identical nonwoven material. The fibres of the nonwoven material 2C consist of a polymer; such as for example PPS or a blend of PPS and copolyester and other organic or inorganic fibres, the weights per unit area of the layers of nonwoven material 4 and 6 lying between 50 and 800 g/m2. Moreover, the upper layer of nonwoven ~.aterial 6, preferably facing a noise source, may consist of a melt-blown nonwoven and the lower layer of nonwoven material 4 may consist of a thermally bonded volume nonwoven and/or a layer of cellular material.
The fibres are thermoplastic and inherently f'_ame-retardant. The granules from which the nonwoven fibres are obtained have a specific melt viscosity.
The nonwovens are also resistant to hydrolysis.
Mcreover, they are acoustically absorbent and ;nsulating. yn addition, they have a thermally ,insulating effect. They may also be intumescer:t in order to influence the fire behaviour (favourably).
The middle layer 5 is designed as a layer of cellular material, in particular as a layer of polyimide foam wzich, as can be seen in particular from PUG-02-2000 08 34 +49 202 732057 92i P.06 ?.AUG.2000 14:24 aNWAUTSKANZLEI RIEDER & PRRTNER NR.24S S.7i12 w0 00/3d943 PCT/EP99/09509 _ 5 _ the sectiona= representa~ion in Figure 2, is non-flat, ~:zree-dimensionally structured. In fact, the design is chosen such that the layer.of cellular material runs in a zigzag form in the extent of its plane. The choice o' a polyimide foam creates a very lightweight middle ~.ayer with a comparatively large volume for the Formation of the ,:.nsulating element 1.
The layer of cellular material consists o~ a cut polyimide foam, the thickness and/or angular path of the zigzag webs 7 relative to the perpendicular a_lowirg a desired sound absorption behaviour to be set. ~n the exemplary embodiment shown, a material thickness d of approximately 8 mm has been chosen, with a total height h of the zigzag-shaped layer of cellular material 5 of approximately 24 mm. Consequently, a ratio of material thickness d to layer height h of approximately 1 . 3 has been set. A further preferred material thickness d is 35 mm, with a height h of 60 m~~. ~_'his gives a ratio of, 1 . 1.7.
Furthermore, an angle alpha of the webs 7 relative to the perpendicular of 45-60°, for example 55°
is chosen.
he thicknesses of the layers of nonwoven materia'; 4 and 6 are - in the non-compressed state approximately one third to one tenth of the thickness of the middle layer (layer of cellular material 5). The thicknesses of the layers of nonwoven material 4 and 6, seen i:~ absolute terms, lie in the range from 0.5 to 5 rte.
The a.:ranaerr.ent of the individual layers 4 to 6 one on top of the other has the effect of producing V-shaped cavities 3, covered by the respectively assigned layer of nonwcven material 4 or 6, in the region of the interstices formed by the zigzag form of the middle layer of cellular mat erial 5. Furthermore, this rnay have the result that each layer of nonwoven material 4, 6 has a slightly corrugated structure in the extent of ~~ts plane, according to the cross-sectional representation ir. F~~.gure 2; it is accordingly not AUG-02-6000 05:35 ~49 ~0~ 732057 92i P.07 ?.RUG.2a02 14:25 qNwALTSKANZUEI RIEDER & PARTNER NR.243 S.8~12 w0 00/34943 PCT/EP99/09509 -stretched taut over the middle layer of cellular material 5.
The film layers 2 and 3 are fibre-reinforced films of very small thickness, The thickness lies be~ween 10 and 15 Vim. preferably around 20 Eun. The density lies around approximately 0.9 to 1.4 g/cm'.
The films are likewise thermoplastic and resistant to hydrolysis. In particular, they also have water-vapour permeabilities matching one another.
In terms of material, inherently flame-retardant polymers may be concerned. As fibres, glass fibres, but also melamine resin fibres, may be lamira~ed on for example. In the exemplary embodiment represented, only the lower outer film layer 2 is fibre-reinfo:Yced, the fibres 9 being provided on the i.~.side ef this film 2. .he fibres 9 are indicated in Figure 1 by a arid on the lower outer layer of film 2.
In the cross-sectional representation according to Figure 2, the criss-cross arrangement of the fibres 9 is represented on an exaggerated scale.
It is preferred for the fibres 9 to be provided only on one side of the film. The grid lies between approxima:ely i and 5 mm. Fibres respectively running transversely in relation to one another are provided.
The outer film layers 2, 3 are edge-welded, it also being conceivable to taJce the exemplary embodiment represented a stage further and integrate all or some of the layers of nonwoven and/or cellular material 4 to E into the weld 10, this bei:~g accomplished for 3~ instance by an edge compression of the layers of noawoven and/or cellular material 9 to 6 going to virtually noth,'~ng.
T:ze edge compression may be used for shaping the component. Fastening elements may also be integrated into such a weld 10.
.he cor.:plete composite struc*~ure is held together just by the edge-bonded or edge-welded films 2, 3, possibly with the layers of nonwoven and/or cellular material 4 to 6 being incorporated.
FUG-e2-~~ee e8:35 ~a~ 2~2 732e57 92i P.~e ?.AUG.ca02 14:25 ANWALTSKANZ_EI RIECER & PARTNER ~' NR.243 S.9i12 - g _ The layers 4 to E are simply laid one on top of the other - at least cutside the edge region. This produces as it were a cushion with a sheath formed by tce outer films 2, 3. ' A';1 features disclosed are material to the ~.~ventien. The full content of the disclosure of the associated/attached priority documents (copy of the prior application) is hereby incorporated in the disclosure of the application, also ;or the purpose of "~C including features of these documents in claims of the present application.
AUG-22-2028 02:35 +49 2D2 '3275? 92i P.09

Claims (16)

- 9 -
1. Multi-layer insulating element (1) with a layer of nonwoven material (4, 6) and a layer of cellular material (5), which are provided in layers arranged one on top of the other, characterized in that the layer of cellular material (5) consists of non-flat, three-dimensionally structured polyimide foam.
2. Multi-layer insulating element (1) with two layers of cellular material which are provided in layers arranged one on top of the other, characterized in that a layer of cellular material (5) consists of non-flat, three-dimensionally structured polyimide foam.
3. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the layer of cellular material (5) consists of a cut foam.
4. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the layer of cellular material runs in a zigzag form.
5. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that a desired sound absorption behaviour is set by means of the thickness (d) and/or the angular path (angle alpha) of the zigzag webs (7) relative to the perpendicular.
6. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the layer of cellular material (5) is covered on the upper side and underside by a layer of nonwoven material (4, 6).
7. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that two layers of cellular material (5) are provided and a layer of nonwoven material is provided between the layers of cellular material (5).
8. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the layers (4 to 6) of the insulating element (1) are sheathed by a film.
9. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the sheathing film comprises two film layers (2, 3).
10. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the film layers (2, 3) are outer layers.
11. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the outer film layers (2, 3) are edge-welded and in that the complete composite structure is held together as a result.
12. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the film layers (2, 3) are water-vapour-permeable membrane films.
13. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that one film (2, 3) is fibre-reinforced.
14. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the fibres (9) are provided on the inside of the film (2, 3).
15. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the film layers (2, 3) are intermediate layers.
16. Insulating element according to one or more of the preceding claims or in particular according thereto, characterized in that the sound insulating behaviour of the insulating element is set with regard to a specific degree of sound insulation by means of the thickness and/or the weight per unit area and/or the thickness and/or the material of the film.
CA002319355A 1998-12-07 1999-12-06 Multilayer insulation element Abandoned CA2319355A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19856377A DE19856377A1 (en) 1998-12-07 1998-12-07 Multi-layer insulation element
DE19856377.9 1998-12-07
PCT/EP1999/009509 WO2000034943A1 (en) 1998-12-07 1999-12-06 Multilayer insulation element

Publications (1)

Publication Number Publication Date
CA2319355A1 true CA2319355A1 (en) 2000-06-15

Family

ID=7890238

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002319355A Abandoned CA2319355A1 (en) 1998-12-07 1999-12-06 Multilayer insulation element

Country Status (6)

Country Link
EP (1) EP1053543B1 (en)
AT (1) ATE288612T1 (en)
CA (1) CA2319355A1 (en)
DE (2) DE19856377A1 (en)
ES (1) ES2237964T3 (en)
WO (1) WO2000034943A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8662448B2 (en) 2011-06-06 2014-03-04 The Boeing Company System and method for insulating frame member
CN109836773A (en) * 2017-11-27 2019-06-04 海洋化工研究院有限公司 A kind of underwater sound composite material and manufacturing method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20213228U1 (en) 2002-08-23 2002-10-31 Carcoustics Tech Center GmbH & Co.KG, 51381 Leverkusen Multi-layer sound and heat insulation part
DE202004005948U1 (en) * 2004-04-13 2005-08-25 Carcoustics Tech Center Gmbh Sandwich-type airborne sound absorber
US8899519B2 (en) 2011-03-15 2014-12-02 The Boeing Company Method and system for insulating frame member
CN103903608B (en) * 2012-12-27 2018-12-25 浙江艾迪雅汽车部件新材料有限公司 A kind of efficient acoustic material and preparation method thereof
CN106223537B (en) * 2016-08-30 2018-11-16 广东裕铧建材有限公司 Partition panel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4690847A (en) * 1986-06-26 1987-09-01 Burlington Industries, Inc. Cold weather garment structure
DE9414943U1 (en) * 1994-09-14 1996-01-18 M. Faist GmbH & Co KG, 86381 Krumbach Foil resonance absorber
DE19616340C2 (en) * 1996-04-24 1999-12-30 Freudenberg Carl Fa Soundproofing element and a method for its production

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8662448B2 (en) 2011-06-06 2014-03-04 The Boeing Company System and method for insulating frame member
CN109836773A (en) * 2017-11-27 2019-06-04 海洋化工研究院有限公司 A kind of underwater sound composite material and manufacturing method
CN109836773B (en) * 2017-11-27 2020-08-18 海洋化工研究院有限公司 Underwater acoustic composite material and manufacturing method thereof

Also Published As

Publication number Publication date
EP1053543B1 (en) 2005-02-02
WO2000034943A1 (en) 2000-06-15
DE19856377A1 (en) 2000-06-08
EP1053543A1 (en) 2000-11-22
ATE288612T1 (en) 2005-02-15
DE59911555D1 (en) 2005-03-10
ES2237964T3 (en) 2005-08-01

Similar Documents

Publication Publication Date Title
US6220388B1 (en) Acoustical insulation panel
US7820573B2 (en) Low porosity facings for acoustic applications
US7000729B2 (en) Five-layer sound absorbing pad: improved acoustical absorber
AU2008356694B2 (en) Sound absorption material and method of manufacturing sound absorption material
US4414265A (en) Insulation board
US4094380A (en) Multi layer sound-proofing structure
EP3297821B1 (en) Multi-impedance composite
CA2584932A1 (en) Multi-layer thermal insulation system
US11820102B2 (en) Nonpermeable composite material
JPWO2009125742A1 (en) Composite sound absorbing structure
US20210162702A1 (en) Nonwoven composite for air flow applications
US20230085014A1 (en) Architectural flooring underlayment
CA2319355A1 (en) Multilayer insulation element
CA2378427A1 (en) Insulating element
JPH0887279A (en) Sound absorbing body
JP2007034254A (en) Porous material-based sound absorbing material with improved sound absorbing performance
KR102388493B1 (en) Electric vehicle engine room sound-absorbing panel and its manufacturing method
JP2004122545A (en) Thermoformable core material and interior finish material for car using the core material
WO2017192529A1 (en) Skinned fibrous composite
CA2107822A1 (en) Heat-insulating element
CN117098651A (en) Multi-layer fibrous structure for thermo-acoustic applications

Legal Events

Date Code Title Description
FZDE Discontinued
FZDE Discontinued

Effective date: 20041206