CA2280424A1 - Composite membrane and its use for noise reduction - Google Patents

Composite membrane and its use for noise reduction Download PDF

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Publication number
CA2280424A1
CA2280424A1 CA002280424A CA2280424A CA2280424A1 CA 2280424 A1 CA2280424 A1 CA 2280424A1 CA 002280424 A CA002280424 A CA 002280424A CA 2280424 A CA2280424 A CA 2280424A CA 2280424 A1 CA2280424 A1 CA 2280424A1
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Canada
Prior art keywords
membrane
composite membrane
layer
iso
composite
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
CA002280424A
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French (fr)
Inventor
Richard Theoret
Alain Poirier
Robert Ducharme
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Individual
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Soleno Textiles Techniques Inc
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Priority to CA002280424A priority Critical patent/CA2280424A1/en
Publication of CA2280424A1 publication Critical patent/CA2280424A1/en
Abandoned legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Electromagnetism (AREA)
  • Floor Finish (AREA)
  • Laminated Bodies (AREA)

Description

MEMBRANE COMPOSITE ET
USAGE DE CELLE-CI POUR ATTÉNUER LES BRUITS
DOMAINE TECHNIQUE DE L'INVENTION
La présente invention a pour objet une nouvelle membrane composite et son usage avec les revêtements durs, notamment des planchers résidentiels et commerciaux, dans le but d'atténuer les bruits et plus particulièrement le bruit d'impact. Un autre objet de la présente invention est un procédé d'isolation phonique consistant à disposer ladite membrane composite sous la surface à
protéger.
ART ANTÉRIEUR
Des matériaux permettant de réduire le bruit d'impact sont actuellement offerts sur le marché. II s'agit notamment de produits fabriqués à partir de caoutchouc recyclé
ou de liège.
Ces produits notamment ceux commercialisés sous les marques de commerce Enkasonic~ et Acousti-mat offrent des performances acceptables mais sont d'un coût de fabrication élevé et difficiles à installer sur le lieu à protéger.
EXPOSÉ DU PROBL~ME TECHNIQUE Ä RÉSOUDRE
L'augmentation de la densité de population en milieu urbain est une des principales raisons à l'origine de la construction de logements et de bureaux d'une taille de plus en plus réduite.
Ainsi, les occupants de ces logements et bureaux sont de plus en plus exposés aux bruits générés par des sources sonores multiples : télévision, bruits d'enfants, systèmes de son, outillage électrique, téléphone et bruits de circulation. COMPOSITE MEMBRANE AND
USING IT TO REDUCE NOISE
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a new composite membrane and its use with hard coatings, including residential floors and commercial, in order to attenuate the noises and more particularly the noise impact. Another object of the present invention is a method of insulation phonic consisting in placing said composite membrane under the surface to protect.
PRIOR ART
Materials to reduce impact noise are currently offered on the market. These include products made from rubber recycled or cork.
These products, in particular those marketed under trademarks Enkasonic ~ and Acousti-mat offer acceptable performance but are of a high manufacturing cost and difficult to install on the place to be protected.
EXPLANATION OF THE TECHNICAL PROBLEM TO BE SOLVED
The increase in population density in urban areas is one of the main reasons behind the construction of housing and offices of a more and more reduced size.
As a result, the occupants of these dwellings and offices are increasingly exposed noise generated by multiple sound sources: television, noise children, sound systems, power tools, telephone and traffic noise.

2 Afin de préserver la santé des occupants de ces logements et bureaux, de nouvelles normes ont vu le jour. Ces normes environnementales relatives au seuil sonore tolérable par un individu ainsi que la recherche d'une diminution du coût des matériaux utilisés dans la construction ont rendu nécessaire la mise au point de matériaux isolants hautement performants.
II existe par conséquent un besoin pour un nouveau matériau d'un faible coût de revient, d'une pose facile et doté d'une bonne efficacité dans l'atténuation des bruits et plus particulièrement dans l'atténuation du bruit d'impact.
RÉSUMÉ DE L'INVENTION
La membrane composite selon l'invention comprend une première couche plane faite d'un produit de synthèse non-tissé aiguilleté et une deuxième couche plane constituée par un film polymérique, ces deux couches étant solidarisées au niveau de leur surface de contact.
La membrane composite selon l'invention s'applique facilement sur les surfaces que l'on souhaite protéger du bruit.
La membrane composite selon l'invention et son usage en vue d'atténuer les bruits apportent une solution aux problèmes ci-dessus mentionnés.
PRÉSENTATION DES DESSINS
Dans les dessins, la Figure 1 est une vue en perspective d'une membrane composite selon l'invention et la Figure 2 est une coupe de la même membrane composite de la Figure 1 selon le plan vertical II-II'.
Comme il apparaît sur la Figure 1, la première couche (1) de forme parallélépipédique est constituée d'un produit de synthèse non-tissé
aiguilleté. La deuxième couche est constituée d'un film polymérique (2), de préférence d'un film de polyéthylène. 2 In order to protect the health of the occupants of these dwellings and offices, new standards have emerged. These environmental standards relating to threshold sound tolerable by an individual as well as the search for a decrease in cost materials used in construction made it necessary to point high performance insulating materials.
There is therefore a need for a new material of low cost of returns, easy to install and has good attenuation effectiveness of noises and more particularly in the attenuation of impact noise.
SUMMARY OF THE INVENTION
The composite membrane according to the invention comprises a first planar layer made of a needled nonwoven synthetic product and a second layer plane consisting of a polymer film, these two layers being secured to the level of their contact surface.
The composite membrane according to the invention is easily applied to surfaces that we want to protect from noise.
The composite membrane according to the invention and its use in order to reduce the noises provide a solution to the above-mentioned problems.
PRESENTATION OF THE DRAWINGS
In the drawings, Figure 1 is a perspective view of a membrane composite according to the invention and Figure 2 is a section of the same membrane composite of Figure 1 along the vertical plane II-II '.
As shown in Figure 1, the first layer (1) of shape parallelepipedic consists of a non-woven synthetic product needled. The second layer consists of a polymer film (2), preferably a movie polyethylene.

3 Le film de polyéthylène (2) qui est au contact de la surface supérieure (5) est percé de préférence de façon uniforme par des orifices (4).
Le film polymérique (2) est solidarisé à la couche (1) en produit de synthèse non-tissé par les brins (3) du composant non-tissé aiguilleté (1) qui traversent le film (2) par les orifices (4).
DESCRIPTION DÉTAILLÉE DE L'INVENTION
La membrane selon l'invention est essentiellement constituée - d'une première couche plane d'un produit de synthèse non-tissé aiguilleté;
- d'une deuxième couche plane préférentiellement constituée d'un film polymérique comportant des orifices, ladite deuxième couche plane étant au contact de la surface supérieure de la première couche;
- de brins du composant non-tissé aiguilleté de la première couche, traversant les orifices du film polymérique et assurant la cohésion des deux couches de la membrane composite;
La couche non-tissée aiguilletée est préférentiellement faite à partir de fils de polypropylène et/ou de polyester et son poids peut varier de 500 g/m2 à
2000 g/m2~
Le film polymérique qui recouvre la couche d'un produit de synthèse non-tissé
aiguilleté est de préférence fait de polyéthylène et a une épaisseur qui est de préférence comprise entre 25 ~m et 100 gym.
Le film polymérique solidarisé avec la couche non-tissée par aiguilletage a une densité des trous d'aiguilletage dans le film de polyéthylène qui est comprise de préférence entre 200 à 5000 pénétrations par cm2. 3 The polyethylene film (2) which is in contact with the upper surface (5) East preferably drilled uniformly through holes (4).
The polymer film (2) is joined to the layer (1) in synthetic product no-woven by the strands (3) of the needled nonwoven component (1) which pass through the film (2) through the holes (4).
DETAILED DESCRIPTION OF THE INVENTION
The membrane according to the invention essentially consists - a first flat layer of a needled nonwoven synthetic product;
- a second planar layer preferably consisting of a film polymer having orifices, said second planar layer being at contact of the upper surface of the first layer;
- strands of the needled nonwoven component of the first layer, passing through the orifices of the polymer film and ensuring the cohesion of the two layers of the composite membrane;
The needled nonwoven layer is preferably made from threads of polypropylene and / or polyester and its weight can vary from 500 g / m2 to 2000 g / m2 ~
The polymeric film which covers the layer of a nonwoven synthetic product needled is preferably made of polyethylene and has a thickness which is of preferably between 25 ~ m and 100 gym.
The polymeric film secured to the nonwoven layer by needling has a density of the needle holes in the polyethylene film which is included of preferably between 200 to 5000 penetrations per cm2.

4 La solidité de l'assemblage augmente avec la quantité de fils traversant les orifices et de façon plus générale avec les paramètres d'aiguilletage.
La membrane composite selon l'invention est fabriquée de la façon suivante :
des fibres de polypropylène et/ou de polyester de longueur égale, de préférence, à
environ 4 pouces et d'une taille comprise de préférence entre 5 et 6 deniers sont introduits sous forme d'un tapis de fibres dans un dispositif de cardage.
Ä la sortie du dispositif de cardage un voile de carde est récupéré. Ce voile est étalé en couches superposées. L'ensemble des couches superposées est alors soumis à un aiguilletage, de préférence à trois étapes d'aiguilletage. Au cours de la dernière étape d'aiguilletage, un film de polyéthylène est déposé sur la surface du voile de corde aiguilletée et l'ensemble de ces deux matériaux est soumis à
un aiguilletage perpendiculairement au plan du film de polyéthylène. Au cours de cette étape, la feuille de polyéthylène est solidarisée à la partie non-tissée grâce aux fils de polypropylène et/ou de polyester qui remontent au travers des orifices percés par les aiguilles dans le film de polyéthylène.
Le polyéthylène peut être supprimé dans le cas où la membrane ne nécessite pas d'imperméabilisation par exemple dans le cas d'une utilisation sous des tuiles dures de céramiques elles mêmes imperméabilisées. La membrane acoustique est alors simplement composée de fibres de polypropylène et/ou de polyester fabriquées à partir d'un procédé non-tissé aiguilleté.
Différents additifs ou composants peuvent être incorporés dans le constituant non-tissé de la membrane ou à sa surface afin d'optimiser les propriétés notamment les propriétés mécaniques et/ou thermiques et/ou esthétiques de cette dernière. A titre illustratif, une feuille d'aluminium pourrait être placée sur la surface du constituant non-tissé.
L'épaisseur de la membrane dans le cadre des applications habituelles dans le domaine résidentiel et commercial est comprise entre 3 et 15 mm.

Le procédé d'isolation phonique selon l'invention consiste à appliquer la membrane, après son découpage à la forme de la surface de plancher à protéger, sous la surface à protéger. Le découpage se fait avantageusement à l'aide de ciseaux à moquettes ou à l'aide d'un couteau à lame rétractable du type Extracto~. La membrane peut aussi être simplement posée ou collée sous la surface à protéger à différents niveaux entre la structure porteuse et la surface finie. Les meilleurs résultats sont obtenus lorsque la surface que l'on souhaite isoler phonétiquement est « traitée » par une seule pièce de la membrane selon l'invention .
A titre non limitatif les deux exemples suivants d'un procédé d'isolation phonique utilisant la membrane selon I 'invention.
Surface en béton destinée à être recouverte de céramique : la membrane selon l'invention est déposée sur la surface en béton et s'y appuie au niveau de la surface inférieure de la première couche constitutive de la membrane composite selon l'invention. Puis une couche de contreplaqué est déposée sur la surface supérieure du film polymérique constitutif de la deuxième couche de la membrane composite selon l'invention. Le panneau de contreplaqué est alors recouvert de céramique selon une des méthodes habituelles.
Sol sur lequel sont disposées des poutres : la membrane composite selon l'invention est déposée et fixée sur les poutres et s'y appuie au niveau de la surface inférieure de la première couche constitutive d'une membrane composite selon l'invention. Puis des lattes de bois sont disposées sur la surface supérieure du film constitutif de la deuxième couche de matériau composite, perpendiculairement aux poutres. L'espacement entre les lattes est tel qu'il permet la pose traditionnelle d'un plancher sur le support constitué par lesdites lattes.

EXEMPLE DE RÉALISATION DE L'INVENTION
L'exemple qui suit illustre l'invention sans toutefois la limiter.
Une membrane acoustique dénommée Tech-1600~ a été réalisée à partir - d'un polyéthylène de 50 pm d'épaisseur et de couleur jaune, et - de fibres non-tissées constituées de 100% de polypropylène.
La membrane composite testée a la structure représentée sur les Figures 1 et 2.
Cette membrane a une épaisseur de 6 mm et un poids de 1000 g/m2.
Cette membrane a été testée par le Laboratoire Acoustique Architectural 3D
selon les normes - ASTM E-336-90 : Mesure de l'isolement au bruit aérien dans les bâtiments;
- ASTM E-413-87 : Détermination de l'indice STC;
- ASTM E-1007-90 : Mesure de l'isolement au bruit de choc dans les bâtiments;
- ASTM E-989-89 : Détermination de l'indice IIC; et - ISO 3382 : 1975 : Mesure de la durée de la réverbération des auditoriums.
Les normes relatives à l'instrumentation utilisée sont les normes CEI 225 (1966) filtres de bandes d'octave, de demi-octave et de tiers d'octave destinés à
l'analyse des bruits et des vibrations.
Les caractéristiques des appareils utilisés sont rassemblées dans le tableau ci-joint portant le titre Instrumentation.

Description Modle Normes Analyseur d'acoustique Brel & Kjaer # ISO 140-1 8 : 1978 architecturale ISO 140-9 : 1985 ISO 717-1 3 : 1982 ISO 354 : 1985 ISO 3382 : 1975 ISO 3741 : 1988 ISO 3742 : 1988 Imprimante alphanumrique Brel & Kjaer #

Source sonore Brel & Kjaer # ASTM E 597-87 Machine frapper Brel & Kjaer # ISO 140-1 8 : 1978 ISO 140-9 : 1985 Pramplificateur de microphoneBrel & Kjaer #

Microphones 1/2" Brel & Kjaer #

Source sonore talon Brel & Kjaer #

Les instruments mentionnés ci-haut permettent d'appliquer les méthodes d'analyse stipulées par les normes ISO (International Standards and Recommendations) et ASTM (American Society for Testing and Materials).
Les tests acoustiques ont été réalisés suivant les normes précédemment définies dans un environnement contrôlé répondant aux normes et standards en vigueur à
ce jour du point de vue acoustique.
RÉSULTATS DES MESURES
Les résultats résultent de la mesure des performances acoustiques retrouvées sur une dalle définies de la façon suivante - finition de bois, - fourrures de bois, - membrane acoustique Tech-1600~ (posée), - dalle de béton de 8 po, Le FSTC est d'environ 58 et le FIIC est d'environ 63.
Ces résultats acoustiques montrent que la membrane selon l'invention est supérieure aux différents produits sur le marché à savoir notamment Enkasonic~
et Acousti-mat.
Outre un prix de mise sur le marché nettement inférieur à celui des produits concurrents, il est à signaler - une très grande facilité de pose, la membrane livrée sous forme de rouleau peut être facilement découpée à l'aide de ciseaux à moquettes, même en des formes complexes; et - une faible densité en poids et une durabilité.
CONCLUSION
La nouvelle membrane selon l'invention remplit toutes les caractéristiques techniques et économiques nécessaires pour prendre rapidement une part importante du marché croissant des revêtements durs pour surfaces résidentielles et commerciales pour lesquelles on souhaite notamment un pouvoir élevé de réduction du bruit d'impact et une très bonne durabilité. L'utilisation de la membrane selon l'invention est particulièrement avantageuse en raison des très bons coefficients d'isolation relevés et le maintien d'un seuil élevé de performance pendant une période de temps extrêmement longue.
Le procédé d'isolation phonique selon l'invention qui met en oeuvre la membrane composite selon l'invention est simple à utiliser méme par un non professionnel et ne nécessite qu'un temps très court de pose. 4 The strength of the assembly increases with the quantity of wires passing through the orifices and more generally with the needling parameters.
The composite membrane according to the invention is produced in the following manner:
of polypropylene and / or polyester fibers of length preferably equal to about 4 inches and a size preferably between 5 and 6 denier are introduced in the form of a fiber mat into a carding device.
At the exit of the carding device, a card veil is recovered. This veil East spread out in superimposed layers. The set of superimposed layers is then subject to needling, preferably three needling steps. At during the last needling step, a polyethylene film is deposited on the area needled cord veil and all of these two materials are subjected to a needling perpendicular to the plane of the polyethylene film. During this step, the polyethylene sheet is secured to the non-woven part thanks polypropylene and / or polyester threads which go up through orifices pierced by needles in the polyethylene film.
Polyethylene can be removed in case the membrane does not require waterproofing for example in the case of use under tiles hard ceramic tiles themselves. The acoustic membrane is then simply composed of polypropylene and / or polyester fibers made from a needled nonwoven process.
Different additives or components can be incorporated into the constituent non-woven membrane or on its surface to optimize the properties in particular the mechanical and / or thermal and / or aesthetic properties of this last. As an illustration, an aluminum sheet could be placed on the surface of the nonwoven component.
The thickness of the membrane in the context of usual applications in the residential and commercial area is between 3 and 15 mm.

The soundproofing method according to the invention consists in applying the membrane, after cutting to the shape of the floor surface to be protected, under the surface to be protected. Cutting is advantageously done using carpet scissors or a retractable knife type Extracto ~. The membrane can also be simply laid or glued under the surface to be protected at different levels between the supporting structure and the area finished. The best results are obtained when the surface that is wish isolating phonetically is "treated" by a single piece of membrane according to the invention.
Without limitation the following two examples of an isolation process phonic using the membrane according to the invention.
Concrete surface intended to be covered with ceramic: the membrane according to the invention is deposited on the concrete surface and is based thereon at the level of the lower surface of the first constituent layer of the composite membrane according to the invention. Then a layer of plywood is deposited on the surface upper of the polymeric film constituting the second layer of the membrane composite according to the invention. The plywood panel is then covered with ceramic according to one of the usual methods.
Floor on which beams are placed: the composite membrane according to the invention is deposited and fixed on the beams and is supported there on the level of the lower surface of the first layer constituting a composite membrane according to the invention. Then wooden slats are placed on the surface superior of the film constituting the second layer of composite material, perpendicular to the beams. The spacing between the slats is such that allows the traditional laying of a floor on the support formed by said slats.

EXAMPLE OF IMPLEMENTATION OF THE INVENTION
The example which follows illustrates the invention without however limiting it.
An acoustic membrane called Tech-1600 ~ was made from - a polyethylene 50 µm thick and yellow in color, and - non-woven fibers made of 100% polypropylene.
The composite membrane tested has the structure shown in Figures 1 and 2.
This membrane has a thickness of 6 mm and a weight of 1000 g / m2.
This membrane has been tested by the 3D Architectural Acoustic Laboratory according to standards - ASTM E-336-90: Measurement of airborne sound insulation in buildings;
- ASTM E-413-87: Determination of the STC index;
- ASTM E-1007-90: Measurement of impact noise insulation in buildings;
- ASTM E-989-89: Determination of the IIC index; and - ISO 3382: 1975: Measurement of the reverberation time of auditoriums.
The standards relating to the instrumentation used are the IEC 225 standards (1966) octave, half-octave and third-octave band filters for analysis noises and vibrations.
The characteristics of the devices used are collated in the table this-seal bearing the title Instrumentation.

Description Model Standards Brel & Kjaer Acoustic Analyzer # ISO 140-1 8: 1978 ISO 140-9: 1985 ISO 717-1 3: 1982 ISO 354: 1985 ISO 3382: 1975 ISO 3741: 1988 ISO 3742: 1988 Brel & Kjaer # alphanumeric printer Brel & Kjaer sound source # ASTM E 597-87 Brel & Kjaer hitting machine # ISO 140-1 8: 1978 ISO 140-9: 1985 Microphone amplifierBrel & Kjaer #

1/2 "Brel & Kjaer # Microphones Brel & Kjaer # heel sound source The instruments mentioned above allow the methods to be applied of analysis stipulated by ISO standards (International Standards and Recommendations) and ASTM (American Society for Testing and Materials).
Acoustic tests were carried out according to the standards previously defined in a controlled environment meeting the norms and standards in force at this day from an acoustic point of view.
MEASUREMENT RESULTS
The results result from the measurement of the acoustic performance found sure a slab defined as follows - wood finish, - wood furs, - Tech-1600 ~ acoustic membrane (installed), - 8 '' concrete slab, The FSTC is around 58 and the FIIC is around 63.
These acoustic results show that the membrane according to the invention is superior to the various products on the market, namely in particular Enkasonic ~
and Acousti-mat.
In addition to a marketing price significantly lower than that of the products competitors it should be noted - very easy installation, the membrane delivered in roll form can be easily cut using carpet scissors, even in complex shapes; and - low density by weight and durability.
CONCLUSION
The new membrane according to the invention fulfills all the characteristics techniques and economics necessary to quickly take a share importance of the growing market for hard surface coatings residential and commercial for which we particularly want a high power of impact noise reduction and very good durability. The use of membrane according to the invention is particularly advantageous because of the very good insulation coefficients and maintaining a high threshold of performance for an extremely long period of time.
The sound insulation process according to the invention which implements the membrane composite according to the invention is simple to use even with a no professional and requires only a very short exposure time.

CA002280424A 1999-08-17 1999-08-17 Composite membrane and its use for noise reduction Abandoned CA2280424A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2396362A (en) * 2002-12-18 2004-06-23 Proctor Group Ltd A Sound absorbing floor construction comprising non-woven material with vertical fibres
WO2005065933A1 (en) * 2003-12-23 2005-07-21 Carcoustics Tech Center Gmbh Light multilayer sound-absorbing component, in particular for motor vehicles
FR2912203A1 (en) * 2007-02-01 2008-08-08 France Systemes Multilayer composite insulation, useful e.g. in buildings, comprises perforated flexible film and flexible non-woven mat with fibers passing through the perforations

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2396362A (en) * 2002-12-18 2004-06-23 Proctor Group Ltd A Sound absorbing floor construction comprising non-woven material with vertical fibres
GB2396362B (en) * 2002-12-18 2006-05-17 Proctor Group Ltd A Floor construction
WO2005065933A1 (en) * 2003-12-23 2005-07-21 Carcoustics Tech Center Gmbh Light multilayer sound-absorbing component, in particular for motor vehicles
FR2912203A1 (en) * 2007-02-01 2008-08-08 France Systemes Multilayer composite insulation, useful e.g. in buildings, comprises perforated flexible film and flexible non-woven mat with fibers passing through the perforations

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