CA2319355A1 - Multilayer insulation element - Google Patents
Multilayer insulation element Download PDFInfo
- 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
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 70
- 230000001413 cellular effect Effects 0.000 claims abstract description 45
- 239000004642 Polyimide Substances 0.000 claims abstract description 15
- 229920001721 polyimide Polymers 0.000 claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000005755 formation reaction Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000004750 melt-blown nonwoven Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- E04B1/88—Insulating elements for both heat and sound
- E04B1/90—Insulating elements for both heat and sound slab-shaped
-
- 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
- E04B2001/742—Use of special materials; Materials having special structures or shape
- E04B2001/747—Corrugated materials
-
- 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
- E04B2001/8461—Solid slabs or blocks layered
- E04B2001/8471—Solid slabs or blocks layered with non-planar interior transition surfaces between layers, e.g. faceted, corrugated
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Microwave Amplifiers (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
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)
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.
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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20213228U1 (en) * | 2002-08-23 | 2002-10-31 | Carcoustics Tech Ct Gmbh & Co | 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)
| 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 | Faist M Gmbh & Co Kg | Foil resonance absorber |
| DE19616340C2 (en) * | 1996-04-24 | 1999-12-30 | Freudenberg Carl Fa | Soundproofing element and a method for its production |
-
1998
- 1998-12-07 DE DE19856377A patent/DE19856377A1/en not_active Withdrawn
-
1999
- 1999-12-06 CA CA002319355A patent/CA2319355A1/en not_active Abandoned
- 1999-12-06 EP EP99967927A patent/EP1053543B1/en not_active Expired - Lifetime
- 1999-12-06 ES ES99967927T patent/ES2237964T3/en not_active Expired - Lifetime
- 1999-12-06 DE DE59911555T patent/DE59911555D1/en not_active Expired - Lifetime
- 1999-12-06 WO PCT/EP1999/009509 patent/WO2000034943A1/en active IP Right Grant
- 1999-12-06 AT AT99967927T patent/ATE288612T1/en not_active IP Right Cessation
Cited By (3)
| 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 |
|---|---|
| ATE288612T1 (en) | 2005-02-15 |
| EP1053543B1 (en) | 2005-02-02 |
| DE19856377A1 (en) | 2000-06-08 |
| DE59911555D1 (en) | 2005-03-10 |
| WO2000034943A1 (en) | 2000-06-15 |
| EP1053543A1 (en) | 2000-11-22 |
| 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 | |
| EP1819509B1 (en) | Multi-layer thermal insulation system | |
| EP3297821B1 (en) | Multi-impedance composite | |
| US20200230909A1 (en) | Nonpermeable composite material | |
| CA2319355A1 (en) | Multilayer insulation element | |
| US20210162702A1 (en) | Nonwoven composite for air flow applications | |
| JP2007034254A (en) | Porous material-based sound absorbing material with improved sound absorbing performance | |
| US20230085014A1 (en) | Architectural flooring underlayment | |
| US6770350B2 (en) | Insulating element | |
| KR102388493B1 (en) | Electric vehicle engine room sound-absorbing panel and its manufacturing method | |
| JP3678320B2 (en) | Composite board | |
| WO2017192529A1 (en) | Skinned fibrous composite | |
| JP2003316366A (en) | Acoustic material and method for manufacturing the same | |
| RU2023084C1 (en) | Multilayer sound-absorbing material | |
| 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 |