EP1922716A2 - Panneau d'isolation - Google Patents

Panneau d'isolation

Info

Publication number
EP1922716A2
EP1922716A2 EP06764288A EP06764288A EP1922716A2 EP 1922716 A2 EP1922716 A2 EP 1922716A2 EP 06764288 A EP06764288 A EP 06764288A EP 06764288 A EP06764288 A EP 06764288A EP 1922716 A2 EP1922716 A2 EP 1922716A2
Authority
EP
European Patent Office
Prior art keywords
layer
panel
thickness
panel according
areas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06764288A
Other languages
German (de)
English (en)
Other versions
EP1922716B1 (fr
Inventor
Paolo Scudieri
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.)
Adler Plastic SpA
Original Assignee
Adler Plastic SpA
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 Adler Plastic SpA filed Critical Adler Plastic SpA
Priority to PL06764288T priority Critical patent/PL1922716T3/pl
Publication of EP1922716A2 publication Critical patent/EP1922716A2/fr
Application granted granted Critical
Publication of EP1922716B1 publication Critical patent/EP1922716B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • the present invention relates to an insulation panel, specifically a sound-proofing and sound-insulating insulation panel, which is adaptable and capable of perfectly coupling to the surfaces to be mechanically dampened and acoustically insulated.
  • an insulation panel specifically a sound-proofing and sound-insulating insulation panel, which is adaptable and capable of perfectly coupling to the surfaces to be mechanically dampened and acoustically insulated.
  • first layer having constant thickness, capable of absorbing even the highest intensity peaks of the sound waves.
  • peaks are ob- served only at some areas of the surface on which the panel is applied
  • the known panels have the disadvantage of exhibiting a first layer or "mass" having greater thickness than that required to absorb the sound waves hitting these, even in areas of the panel where there is no need, therefore causing a waste of material that results in being more expensive than the foam used as second layer to complete the panel itself.
  • the EPDM film may directly be produced in the mould by injection of liquid EPDM and subsequent cross-linking.
  • the attempts carried out to simultaneously obtain an improvement of the performance of such insulation panels and a decrease in the manufacturing costs have not resulted in the expected outcomes. For instance, to obtain panels having low thickness, there have been used materials having high density and therefore resulting in a weight increase, or limited insulation performance and soundproofing or poor mechanical characteristics have simply been accepted. Thus, there is the need to obtain a new insulation panel that allows to overcome all of the above said drawbacks. Summary of the invention
  • the present invention intends to achieve the above discussed objects by obtaining a sound-insulating panel defining a distinctive extension plane and a distinctive thickness, wherein the plane has a greater extension as compared to thickness, which, according to claim 1 , comprises a first layer in the direction of thickness made of a first non-expanded compact material and a second layer made of a second expanded material, wherein said first layer comprises one or more first areas having physical and/or size characteristics such that a higher sound absorption is obtained than by one or more second areas of the same first layer.
  • the panel of the present invention exhibits a lower weight and size as compared to any panel of the known art having the same predetermined sound performances, by means of the differentiation in different areas of the first layer, or "mass" or base, of size characteristics, as thickness and surface extension, and/or of physical characteristics, as the density of the material. Instead, having the same weight, the panel of the invention has far better soundproofing and sound-insulating characteristics.
  • the objects of the invention are achieved by means of a manufacturing process for such sound-insulation panels that, according to claim 13, comprises the following steps: a) spraying, adjusted by control means, of a first non-expanded compact material on an inner surface of a mould to produce the first layer of the panel, b) injecting a second expanded material inside the mould to produce the second layer of the panel, wherein, before step a), there is defined a mapping of the first and second areas of the first layer, on the basis of which said control means is programmed to adjust spraying of the first compact material.
  • the differentiation of the "mass" of the panel is obtained by a simple spraying operation of the material forming the first layer, preferably polyure- thane, on the surface of one of the two parts of the mould.
  • a spraying operation is programmed depending on predetermined physical and/or size characteristics of the different areas of the first layer of the panel.
  • Figure 1 represents a longitudinal section of part of a panel according to the present invention
  • Figure 2 represents a longitudinal section of part of a variant of the panel of Figure 1.
  • the insulation panel object of the present invention, comprises a first layer 1 made of a compact polyurethane resin or any other equivalent material carrying a uniformly dispersed neutrally charged material, coupled to a second layer 2 made of an expanded viscoelastic polyurethane resin or any other equivalent material, the latter also carrying a uniformly dispersed neutrally charged material.
  • Said second layer 2 of the insulation panel is preferably made of an expanded viscoelastic polyurethane resin prepared in a known way by reacting together (i) at least one compound selected from ethylene oxides and propylene oxides, named compound A, and (ii) one isocyanic compound, named compound B, an inert mi- cronized compound, named compound C, being uniformly dispersed in said polyurethane resin and being selected from glass fibres, artificial and natural textile fibres, silica, silicates, carbonates and the like, neat or mixed together.
  • ethylene oxides and propylene oxides have molecular weight in the range from 300 to 8000, preferably from 350 to 6500, with a hydroxyl number in the range from 20 to 1000, preferably from 20 to 800, and functionality in the range from 3 to 8.
  • Such compounds are used neat (only ethylene oxides or only propylene oxides) or mixed together, according to what is known.
  • the isocyanic compound is selected from the group com- prising toluene diisocyanate, polymethylene-polyphenyl-isocyanates, diphenyliso- cyanates, having molecular weight in the range from 300 to 7500, preferably from 350 to 6000.
  • the micronized material exhibits size in the range from 10 to 500 ⁇ m, preferably from 50 to 200 ⁇ m; in any case, possible particle size distribution is in the range from 10 to 50 ⁇ m, preferably from 10 to 30 ⁇ m.
  • compound A is in a weight percentage in the range from 30 to 75%
  • compound B is in a weight percentage in the range from 20 to 65%
  • compound C is in a weight percentage in the range from 5 to 50%.
  • Such second layer has a thickness in the range from 2 to 500 mm, preferably from 5 to 400 mm and a specific weight in the range from 30 to 200 Kg/m 3 , preferably from 30 to 150 Kg/m 3 .
  • the material forming first layer 1 is a compact polyurethane resin in- stead, also prepared in a known way by reacting the same above-described compounds A, B, and C together.
  • ethylene oxides and propylene oxides have molecular weight in the range from 300 to 8000, preferably from 350 to 6500, with a hydroxyl number in the range from 20 to 1000, preferably from 25 to 700, and functionality in the range from 3 to 8.
  • Such compounds are used neat (only ethylene oxides or only propylene oxides) or mixed together, according to what is known.
  • the isocyanic compound B has a molecular weight in the range from 350 and 7000, preferably from 400 to 6000.
  • the micronized material has size in the range from 10 to 500 ⁇ m, preferably from 50 to 300 ⁇ m; in any case, possible particle size distribution is in the range from 10 to 50 ⁇ m and from 10 to 30 ⁇ m.
  • compound A is in a weight percentage in the range from 30 to 75%
  • compound B in a percentage in the range from 30 to 55%
  • compound C in a percentage from 10 to 60 %.
  • This first layer has a thickness in the range from 2 to 50 mm, and a basic weight in the range from 1 to 10 Kg/m 2 .
  • said first layer 1 has an uneven thickness with first areas 3 having greater thickness as compared to that of second areas 4, in which said greater thickness defines higher sound absorption characteristics.
  • the position, the thickness and the surface extension of first areas 3 is determined depending on the sound intensity peaks detected on the surface to coat with the panel, previously to the production of the panel.
  • Second layer 2 comprises in turn distinctive first 4' and second 3' areas having thickness and/or sur- face extension complementary to those of corresponding second and first areas 4, 3 of first layer 1 of the panel, at the joining surface of the first and second layers.
  • second layer 2 adhering to the first layer, has a constant thickness for the whole of its surface extension, as shown in Figure 2.
  • second layer 2 comprises distinctive first and second areas 4', 3' having thickness such that the total thickness of the panel is constant for the whole of its surface extension.
  • a further advantageous embodiment of the panel of the invention provides instead that the higher sound absorption characteristics of first areas 3 as compared to second areas 4 of the first layer are defined by a different density of the material sprayed in these areas.
  • first and second areas 3, 4 of first layer 1 of the panel may or may not have the same thickness.
  • the last advantageous embodiment of the panel provides that the different sound absorption characteristics of the different areas of the first layer are defined by the combination of the different density of the material sprayed in these areas and of the different size characteristics, i.e. thickness and surface extension.
  • the panel, comprising said first and second layers has an overall thickness in the range from 4 to 550 mm, preferably from 5 to 400 mm, and a specific weight in the range from 40 to 250 Kg/m 3 .
  • the first and second layers of the panel, object of the present invention are directly coupled in the mould by means of a manufacturing process comprising the following steps:
  • spraying is carried out in an open mould, preferably with an opening of about 90°, by means of an anthropomorphic robot controlling the displacement of the spray gun.
  • a displacement and spraying is programmed depending on the intensity of the sound waves hitting the surface to be insulated. Therefore, the thickness and surface extension of the areas of first layer 1 of the panel may e.g. be differentiated by stopping the spray gun longer on the areas of the mould which correspond to the surface parts for which the sound intensity peaks are predicted to be higher, more or less wide, visible from a predetermined intensimetric mapping.
  • the even thickness of the first layer is determined with reference to the highest intensity peak, resulting in an enormous waste of material and an increase of weight of the whole panel, generally having a basic weight of about 6 kg/m 2 .
  • a second step follows, in which expanded polyurethane is injected in the mould, which is then closed.
  • the expanded polyurethane resin further expands until it "grips" or adheres to said first layer, thus producing the second layer.
  • the mould is opened and the end product is extracted.
  • a preferred composition of the end panel comprises a layer of expanded viscoe- lastic polyurethane resin having density in the range from 30 to 150 Kg/m 3 , pref- erably 40-100 Kg/m 3 , containing the prescribed quantities of micronized material, in a weight percentage in the range from 10 to 50%, preferably from 15 to 45 %, and a layer of compact polyurethane resin having basic weight in the range from 1 to 10 Kg/m 2 , preferably from 2 to 8 Kg/m 2 , containing the prescribed amounts of micronized material in a weight percentage in the range from 10 to 50%, prefera- bly from 20 to 50%.
  • said panel has both sides provided with imprints having generally curved, preferably circular, oval or elliptic profile, and having maximum transverse size in the range from 5 to 15 mm, preferably from 7 to 13 mm, depth in the range from 1 to 10 mm, preferably from 2 to 6 mm, and distance between centres in the range from 1 ,10 to 1 ,80 times said maximum transverse size.
  • the sides of the panel may take the most various shapes so as to conform to different surface configurations in order to acoustically isolate e.g. parts of a car body or engine compartments.
  • the sides of the panel of the invention may therefore also have uneven surfaces and surfaces complementary to complex shape surfaces to be isolated.
  • Example 1 The technical results obtained with some panels according to the present invention, subjected to sound-proofing experiments are shown in the following exam- pies. Such examples are indicated by mere way of example and not by way of limitation of the objects and of the extent of the invention itself.
  • Example 1
  • Panels comprising a second layer made of an expanded polyurethane material obtained by reacting a mixture comprised of 40% of a material named SPECFLEX NS 747 (manufactured by DOW CHEMICAL), 50% SPECFLEX Ns 540, 10% carbonate, having density equivalent to 50 Kg/m 3 , coupled to a first layer made of compact polyurethane material obtained by reacting a mixture comprised of 40% SPECFLEX Ns 768 (manufactured by DOW CHEMICAL), 20% SPECFLEX Ns 540, 40% carbonate, having basic weight equivalent to 5 Kg/m 2 , and thickness of respectively 20, 30, 45 mm, have been subjected to transmission loss soundproofing experiments according to ASTM E1050-90 and ASTM C384-95. The results obtained, in decibels, at different frequencies, are summarised in the following table:
  • Panels comprising a second layer made of an expanded polyurethane material obtained by reacting a mixture comprised of 40% of a material named SPECFLEX Ns 747 (manufactured by DOW CHEMICAL), 50% SPECFLEX Ns 540, 10% carbonate having density of 50 Kg/m 3 , coupled to a first layer made of a compact polyurethane material obtained by reacting a mixture comprised of 40% SPECFLEX Ns 768, 20% SPECFLEX Ns 540, 40% carbonate, having basic weight equivalent to 3 Kg/m 2 , and thickness of respectively 20, 30, 45 mm, have been subjected to transmission loss sound-proofing experiments according to ASTM E1050-90 and ASTM C384-95. The results obtained, in decibels, at different frequencies, are summarised in the following table
  • differential mass panels according to the present invention exhibit higher sound-proofing performance as compared to those obtained with known panels.
  • the difference experimentally found is considerable and is equivalent to about 2 ⁇ 4 dB at the different frequencies.
  • the insulation panel of the invention Compared with an equal weight and size of other similar products, the insulation panel of the invention thus diminishes noise considerably better or, performance being equal, the panel exhibits a lighter weight.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)

Abstract

Panneau d'isolation sonore constitué par deux couches différentes: une première couche en matériau de polyuréthanne compact non expansé, désignée 'masse', et une deuxième couche en polyuréthanne expansé, désignée 'mousse'. Ce panneau atténue le bruit considérablement mieux que d'autres produits analogues ou, si ses performances sont similaires, il présente un poids plus léger par rapport à ces autres produits. Ceci est rendu possible par la répartition différentielle de l'épaisseur et/ou de la densité de la 'masse' de ce panneau dans des zones déterminées, ce qui signifie une économie en termes de matériau. Son procédé de fabrication est également particulièrement avantageux.
EP06764288.4A 2005-08-05 2006-08-02 Panneau d'isolation acoustique Active EP1922716B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06764288T PL1922716T3 (pl) 2005-08-05 2006-08-02 Płyta izolacji akustycznej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000429A ITRM20050429A1 (it) 2005-08-05 2005-08-05 Pannello di isolamento.
PCT/EP2006/064929 WO2007017422A2 (fr) 2005-08-05 2006-08-02 Panneau d'isolation

Publications (2)

Publication Number Publication Date
EP1922716A2 true EP1922716A2 (fr) 2008-05-21
EP1922716B1 EP1922716B1 (fr) 2014-03-12

Family

ID=37603208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06764288.4A Active EP1922716B1 (fr) 2005-08-05 2006-08-02 Panneau d'isolation acoustique

Country Status (4)

Country Link
EP (1) EP1922716B1 (fr)
IT (1) ITRM20050429A1 (fr)
PL (1) PL1922716T3 (fr)
WO (1) WO2007017422A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110305865A1 (en) 2009-03-04 2011-12-15 Dow Global Technologies Inc. (Formerly Known as Dow Global Technologies Inc.) Sound-dampening polyurethane-based composite
TWI504655B (zh) 2009-04-10 2015-10-21 Saint Gobain Performance Plast 含有彈性體微粒之聲阻尼組合物
WO2010118358A2 (fr) 2009-04-10 2010-10-14 Saint-Gobain Performance Plastics Corporation Compositions d'amortissement acoustique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607895C2 (de) * 1996-03-01 1999-02-04 Goesele Karl Schalldämmplatte sowie schalldämmende Verkleidung mit einer Schalldämmplatte
DE19909046B4 (de) * 1999-03-02 2005-04-14 Faist Automotive Gmbh & Co. Kg Akustischer Mehrschichtenabsorber, Verfahren zu dessen Herstellung und dessen Verwendung
US6705268B2 (en) * 2001-09-21 2004-03-16 Basf Aktiengesellschaft Engine noise barrier
FR2848904B1 (fr) * 2002-12-23 2006-09-08 Faurecia Automotive Ind Procede pour realiser une piece d'insonorisation d'epaisseur variable.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007017422A2 *

Also Published As

Publication number Publication date
PL1922716T3 (pl) 2014-09-30
WO2007017422A3 (fr) 2007-04-26
ITRM20050429A1 (it) 2007-02-06
WO2007017422A2 (fr) 2007-02-15
EP1922716B1 (fr) 2014-03-12

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