EP3956528A1 - Acoustic insulation product comprising a backing layer - Google Patents

Acoustic insulation product comprising a backing layer

Info

Publication number
EP3956528A1
EP3956528A1 EP20716795.8A EP20716795A EP3956528A1 EP 3956528 A1 EP3956528 A1 EP 3956528A1 EP 20716795 A EP20716795 A EP 20716795A EP 3956528 A1 EP3956528 A1 EP 3956528A1
Authority
EP
European Patent Office
Prior art keywords
kpa
sound insulation
insulation product
layer
mpa
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.)
Pending
Application number
EP20716795.8A
Other languages
German (de)
French (fr)
Inventor
Benjamin SOURCIS
Pierre Leroy
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.)
Saint Gobain Isover SA France
Saint Gobain Placo SAS
Original Assignee
Saint Gobain Isover SA France
Saint Gobain Placo SAS
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 Saint Gobain Isover SA France, Saint Gobain Placo SAS filed Critical Saint Gobain Isover SA France
Publication of EP3956528A1 publication Critical patent/EP3956528A1/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B1/86Sound-absorbing elements slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/04Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
    • E04B9/045Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like being laminated
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/22Connection of slabs, panels, sheets or the like to the supporting construction
    • E04B9/24Connection of slabs, panels, sheets or the like to the supporting construction with the slabs, panels, sheets or the like positioned on the upperside of, or held against the underside of the horizontal flanges of the supporting construction or accessory means connected thereto
    • E04B9/241Connection of slabs, panels, sheets or the like to the supporting construction with the slabs, panels, sheets or the like positioned on the upperside of, or held against the underside of the horizontal flanges of the supporting construction or accessory means connected thereto with the slabs, panels, sheets or the like positioned on the upperside of the horizontal flanges of the supporting construction
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8263Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
    • E04B2001/8281Flat elements mounted parallel to a supporting surface with an acoustically active air gap between the elements and the mounting surface
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8461Solid slabs or blocks layered
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8476Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element

Definitions

  • the invention relates to an acoustic insulation product intended to be used in particular as a suspended ceiling tile.
  • Suspended ceilings are widely used in the tertiary sector to conceal technical equipment above rooms.
  • the space above a suspended ceiling is called the plenum. From an acoustic point of view, suspended ceilings serve two main functions:
  • Suspended ceiling tiles are often made of a fiber-based panel such as mineral wool, or other porous material, on which are attached:
  • the invention provides a sound insulation product comprising:
  • a panel made of porous material, in particular based on foam or fibers comprising a first face, called the rear face, intended to be turned towards a wall such as a ceiling or a wall, and a second face, called the front face, located opposite the rear face,
  • the rear layer which adheres to or is bonded or coupled at least in part to the rear face of the panel made of porous material, the rear layer having an air flow resistance which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
  • the rear layer is a fibrous web in woven or non-woven fabric, a paint layer or even a layer of compressed mineral wool, or even a plastic film, or any other material in the form of a membrane or film.
  • the rear layer has a thickness less than or equal to 1 cm, preferably less than or equal to 1 mm.
  • the rear layer is micro-perforated.
  • the panel of porous material is a panel of mineral and / or vegetable and / or synthetic wool, a panel of open porosity foam or else a panel of agglomerated fibers obtained. wet.
  • the panel of porous material has a surface density of between 0.8 kg / m 2 and 10 kg / m 2 .
  • the panel of porous material has an air flow resistivity of between 30 kPa.s / m 2 and 120 kPa.s / m 2 , preferably between 50 kPa.s / m 2 and 110 kPa.s / m2, or even between 50 kPa.s / m 2 and 100 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 90 kPa.s / m 2 , or even between 50 kPa.s / m 2 / m 2 and 80 kPa.s / m 2
  • the panel made of porous material has a Young's modulus of between 0.1 MPa and 4 MPa, preferably between 0.5 and 4 MPa, even more preferably between 0.8 and 4 MPa, or even between 1, 2 MPa and 4 MPa, or else between 1, 5 MPa and 4 MPa, or between 2 MPa and 4 MPa.
  • the panel of porous material has a thickness of between 10 mm and 60 mm.
  • the sound insulation product further comprises a second layer, called the front layer, in the form of a veil, a membrane, a film, a paint or a coating of plaster, bonded or glued to the front face of the panel of porous material, this front layer having a resistance to air flow less than or equal to 1 kPa.s / m, preferably less than or equal to 0.5 kPa.s / m.
  • the front layer in the form of a veil, a membrane, a film, a paint or a coating of plaster, bonded or glued to the front face of the panel of porous material, this front layer having a resistance to air flow less than or equal to 1 kPa.s / m, preferably less than or equal to 0.5 kPa.s / m.
  • the sound insulation product is intended for use as an acoustic ceiling tile on a frame suspended from a ceiling with a plenum between the sound insulation product and the ceiling.
  • the sound insulation product can also fulfill a thermal insulating function, in particular in the case of ceiling systems or of furthermoregulating (heating and / or cooling). This embodiment is also included in the invention.
  • the invention also relates to an acoustic insulation system suspended from a ceiling or in front of a wall, comprising a structure for suspending an insulating facing away from the ceiling or from the wall wall, in which the facing comprises at least one sound insulation product according to the invention, the rear layer being oriented towards the ceiling or the wall wall.
  • the invention also relates to a use of the acoustic insulation product according to the invention as an acoustic ceiling tile on a frame suspended from a ceiling with a plenum between the acoustic insulation product and the ceiling, the rear layer being oriented. towards the ceiling or wall.
  • Fig. 1 shows a sectional view of an acoustic insulation product according to the invention
  • Fig. 2 shows a sectional view of an acoustic insulation product in its use as a suspended ceiling tile.
  • the invention relates to an acoustic insulation product comprising:
  • a panel made of porous material, in particular based on foam or fibers comprising a first face, called the rear face, intended to be turned towards a wall such as a ceiling or a wall, and a second face, called the front face, located opposite the back side,
  • the rear layer which adheres to or is bonded or coupled at least in part to the rear face of the panel made of porous material, the rear layer having an air flow resistance which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
  • the air flow resistance measurement is performed according to ISO 9053.
  • the resistance to air flow of the back layer is representative of a limited capacity for air to pass through it, which may be linked to the presence of small pores in layer.
  • the resistance to air flow of the rear layer being between 5 kPa.s / m and 20 kPa.s / m, it introduces an energy dissipation by viscous friction of the air set in motion by the acoustic wave.
  • the acoustic waves not dissipated in the panel of porous material and in the back layer pass into the plenum, they undergo multiple reflections.
  • the invention also overcomes a cross section of the sealed rear wings of the prior art which, by forming an almost perfectly reflective face for acoustic waves, amplifies the energy of the resonance modes in the plenum.
  • the resistance to air flow of the rear layer according to the invention allows part of the acoustic waves to pass through it.
  • the sound insulation between the room and the plenum is therefore slightly degraded.
  • the resistance to air flow of the rear layer is chosen so as not to degrade the sound insulation, that is to say to keep the inert effects of the porous material panel. .
  • the intensity of the acoustic waves which is reflected in the plenum is less and the sound insulation between two neighboring rooms is improved.
  • the dissipation provided in the plenum by the rear layer reduces the propagation of waves in this same plenum.
  • the sound insulation product according to the invention indeed makes it possible to improve both sound insulation and sound absorption.
  • FIG. 1 shows a sectional view of a sound insulation product according to the invention.
  • the sound insulation product 5 comprises a panel made of porous material 1, in particular based on foam or fibers.
  • the panel of porous material 1 is for example a panel of mineral and / or vegetable and / or synthetic wool, a panel of foam with open porosity or else a panel of agglomerated fibers obtained by the wet process such as mineral fibers and / or. or cellulose shaped by suspension with an inorganic or organic binder.
  • the porous material panel has a first main face, called the rear face 20, intended to face a wall, which may be a ceiling (7 in FIG. 2) or a wall, and a second face, called the front face 30, located opposite the rear face 20.
  • the front face is intended to face the interior of a room, a room (4 in FIG. 2) or even a corridor.
  • the sound insulation product 5 further comprises a layer, called the rear layer 2, which adheres to or is bonded or coupled at least in part to the rear face 20 of the panel made of porous material 1.
  • the bond or adhesion is made from preferably by gluing, for example in the form of spots or lines of glue.
  • the entire surface of the back layer is not necessarily coated with glue.
  • the rear layer 2 is for example a fibrous web in woven or non-woven fabric, a layer of paint or even a layer of compressed mineral wool, or even a plastic film or any type of material in the form of a film or a membrane. .
  • the rear layer 2 is a layer of paint, the latter is deposited on the panel made of porous material 1 in liquid form and left to dry. There is then no bonding step, but a coating step with a primer can take place.
  • the paint can optionally contain a pore-forming agent to provide adequate resistance to the passage of air.
  • the back layer 2 has an air flow resistance which is between 5 kPa.s / m and 20 kPa.s / m to allow improvement in both sound absorption, especially at bass frequencies, and sound insulation, as explained above. It is this well chosen range of resistance to air flow which enables this technical effect. Indeed, below 5 kPa.s / m, the sound insulation is degraded. Above 20 kPa.s / m, there is no longer any gain in absorption. Preferably the resistance to air flow is included between 7 kPa.s / m and 15 kPa.s / m, which further improves sound absorption and sound insulation.
  • the air flow resistance measurement is carried out according to ISO 9053.
  • the rear layer has for example a thickness less than or equal to 1 cm, preferably less than or equal to 1 mm.
  • the rear layer 2 can be micro-perforated, that is to say that micro-perforations 4 are pierced through the rear layer 2.
  • These micro-perforations 4 can be perforated. for example, be drilled in a rear layer 2 already in place on the porous material panel 1, which has the advantage of not blocking the micro-perforations 4 when bonding the rear layer 2 on the porous material panel 1
  • the micro-perforations 4 can be produced in a rear layer 2 made up of a so-called impermeable veil of fibers (having a resistance to the flow of air before perforation of greater than 50 kPa.
  • s / m so as to give it a resistance to air flow after perforation which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
  • oL denotes the airflow resistance of the micro-perforated back layer and h the dynamic viscosity of air.
  • the back layer can be pierced with multi-diameter micro-perforations.
  • the panel made of porous material 1 preferably has a surface density of between 0.8 kg / m 2 and 10 kg / m 2 , so as to have sufficient mechanical strength for application as a ceiling tile while at the same time not being too heavy.
  • the panel made of porous material 1 preferably has an air flow resistivity of between 30 kPa.s / m 2 and 120 kPa.s / m 2 so as to absorb acoustic waves.
  • the panel made of porous material 1 has an air flow resistance of between 50 kPa.s / m 2 and 110 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 100 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 90 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 80 kPa.s / m 2 , to improve sound absorption.
  • the airflow resistivity measurement is obtained by dividing the airflow resistance of the panel by its thickness.
  • the panel of porous material 1 also preferably has a Young's modulus of between 0.1 MPa and 4 MPa so as to provide sound insulation.
  • the panel made of porous material 1 has a Young's modulus of between 0.5 MPa and 4 MPa, even more preferably between 0.8 MPa and 4 MPa, or even between 1.2 MPa and 4 MPa, or alternatively between 1.5 MPa and 4 MPa, or between 2 MPa and 4 MPa to improve its sound insulation.
  • the Young's modulus is measured according to the ISO 18437 standard and according to the article by C. Langlois, R. Panneton and N. Atalla: Polynomial relations for quasi-static mechanical characterization of isotropy poroelastic materials, J. Acoust . Soc. Am., 110: 3032-3040, 2001.
  • the porous material panel 1 further preferably has a thickness of between 10 mm and 60 mm. This range of thickness allows a good mechanical shade of the panel and sufficient absorption of acoustic waves for a ceiling tile application.
  • the sound insulation product 5 further preferably comprises a second layer, called the front layer 3, in the form of a veil, a membrane, a film, a paint or a plaster coating, bound or glued to the front face 30 of the panel made of porous material 1.
  • This front layer has a decorative function above all. It has an air flow resistance which is less than or equal to 1 kPa.s / m, preferably less than or equal to 0.5 kPa.s / m, so as to allow sufficient air to enter in the porous material panel 1 in order to allow absorption and sound insulation by the porous material panel 1 and by the rear layer 2.
  • the sound insulation product 5 also preferably provides thermal insulation.
  • the benchmark sound insulation product tested includes a mineral wool panel with a surface density of 5 kg / m 2 , thickness 50 mm, Young's modulus 0.65 MPa and a flow resistivity of air of 85 kPa.s / m, a rear non-woven glass fiber web having an air flow resistance of 70 kPa.s / m and a thickness of 0.6 mm, and a front web having an air flow resistance of 0.5 kPa.s / m.
  • the acoustic insulation product according to the invention is the same product, in which the rear wall has also been pierced with micro-perforations of 0.18 mm diameter, with a perforation rate of 0.15%. The resistance to air flow of the micro-perforated rear wall was measured at 7.5 kPa.s / m.
  • Sound absorption and sound insulation were measured on both products.
  • the sound absorption is measured according to the ISO 354 standard.
  • the aw indicator is then calculated according to the ISO 11654 standard. Throughout the application, the measurements were carried out with a plenum of 200 mm in construction height.
  • D nf is then calculated according to the ISO 717-1 standard. Throughout the request, the measurements were carried out with a plenum of 700 mm in construction height.
  • a gain in sound absorption (as and aw) of 0.05 was observed over the entire frequency range between 100 Hz and 5000 Hz and an insulation gain of approximately +1 dB on the D nf, w between the product of sound insulation according to the invention, of which the rear wall has an air flow resistance of 7.5 kPa.s / m, and the reference sound insulation product, of which the rear wall has a resistance to air flow of 100 kPa.s / m.
  • the acoustic insulation product according to the invention does indeed improve both the acoustic insulation and the acoustic absorption.
  • the sound insulation product 5 is preferably intended for use as a suspended ceiling tile. It can also be used as an acoustic cladding on any other wall, for example on a wall. A plenum between the sound insulation product and the wall allows optimal use of it.
  • Figure 2 shows a sectional view of a sound insulation product in use as a suspended ceiling tile.
  • FIG. 2 shows a suspended ceiling comprising a metal frame 7 fixed to a ceiling wall and provided at its lower end with a ledge 9 on which the ceiling tiles rest, each ceiling tile being formed of a acoustic insulation product 5 according to the invention.
  • a plenum 6 is present between the wall 7 of the ceiling and the upper surface of the sound insulation product 5, namely the rear layer 2.
  • the rear face 20 of the sound insulation product 5, covered with the rear layer 2 is oriented towards the wall 7 of the ceiling.
  • the face front 30 of the soundproofing product 5, covered here with a front panel 3, is oriented towards the interior of a room 4.
  • the invention also relates to a use of the acoustic insulation product 5 as an acoustic ceiling tile on a frame 8 suspended from a ceiling 7 with a plenum 6 between the acoustic insulation product 5 and the ceiling 7, as well as a corresponding sound insulation system.
  • the invention also relates to a wall sound insulation system.

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

Abstract

The invention relates to an acoustic insulation product (5) comprising a panel (1) made of porous material, based on foam or fibres, comprising a first face, referred to as back face (20), intended to face towards a wall, and a second face, referred to as front face (30), situated on the opposite side to the back face (20), and a layer, referred to as backing layer (2), which adheres to or is linked or coupled at least in part to the back face (20) of the panel (1) made of porous material, the backing layer (2) having an airflow resistance of between 5 kPa.s/m and 20 kPa.s/m, preferably between 7 kPa.s/m and 15 kPa.s/m. The acoustic insulation product according to the invention is able to improve both acoustic insulation and noise absorption.

Description

DESCRIPTION DESCRIPTION
TITRE : PRODUIT D’ISOLATION ACOUSTIQUE COMPRENANT UNE COUCHE TITLE: ACOUSTIC INSULATION PRODUCT INCLUDING A LAYER
ARRIERE BACK
L’invention concerne un produit d’isolation acoustique destiné à être utilisé en particulier comme dalle de plafond suspendu. The invention relates to an acoustic insulation product intended to be used in particular as a suspended ceiling tile.
Les plafonds suspendus sont très largement utilisés dans le secteur tertiaire pour dissimuler les équipements techniques au-dessus des salles. L’espace situé au-dessus d’un plafond suspendu s’appelle le plénum. D’un point de vue acous tique, les plafonds suspendus remplissent deux fonctions principales: Suspended ceilings are widely used in the tertiary sector to conceal technical equipment above rooms. The space above a suspended ceiling is called the plenum. From an acoustic point of view, suspended ceilings serve two main functions:
- assurer une bonne absorption des ondes acoustiques (ce qui est fonda mental pour le confort acoustique), - ensure good absorption of acoustic waves (which is fundamental for acoustic comfort),
- et, éventuellement, réaliser l’isolation acoustique entre deux pièces voisines connectées par un plénum se situant au-dessus du plafond suspendu. - and possibly achieve sound insulation between two adjoining rooms connected by a plenum located above the suspended ceiling.
Les dalles de plafonds suspendus sont souvent composées d’un panneau à bases de fibres tel qu’en laine minérale, ou en autre matériau poreux, sur lequel sont rapportés : Suspended ceiling tiles are often made of a fiber-based panel such as mineral wool, or other porous material, on which are attached:
- un voile avant assurant une fonction esthétique et une correction acoustique pour l’absorption, et - a front veil providing an aesthetic function and acoustic correction for absorption, and
- un voile arrière assurant l’étanchéité à l’air entre la salle et le plénum. - a rear veil ensuring airtightness between the room and the plenum.
Ces systèmes acoustiques ont essentiellement deux travers : These acoustic systems have two main features:
- faible absorption acoustique aux basses fréquences, et - low sound absorption at low frequencies, and
- des phénomènes de résonance dans le plénum, qui propagent le son par le plafond, ce qui a un impact négatif sur l’isolation acoustique. - resonance phenomena in the plenum, which propagate sound through the ceiling, which has a negative impact on sound insulation.
Il y a donc un besoin pour un produit d’isolation acoustique, qui permette d’améliorer à la fois l’isolation acoustique et l’absorption acoustique. There is therefore a need for a sound insulation product, which improves both sound insulation and sound absorption.
Pour cela, l’invention propose un produit d’isolation acoustique comprenant : For this, the invention provides a sound insulation product comprising:
- un panneau en matériau poreux, notamment à base de mousse ou de fibres, comprenant une première face, dite face arrière, destinée à être tournée vers une paroi telle qu’un plafond ou un mur, et une deuxième face, dite face avant, située à l’opposé de la face arrière, - a panel made of porous material, in particular based on foam or fibers, comprising a first face, called the rear face, intended to be turned towards a wall such as a ceiling or a wall, and a second face, called the front face, located opposite the rear face,
- une couche, dite couche arrière, qui adhère ou est liée ou couplée au moins en partie à la face arrière du panneau en matériau poreux, la couche arrière ayant une résistance à l’écoulement de l’air qui est comprise entre 5 kPa.s/m et 20 kPa.s/m, de préférence entre 7 kPa.s/m et 15 kPa.s/m. a layer, called the rear layer, which adheres to or is bonded or coupled at least in part to the rear face of the panel made of porous material, the rear layer having an air flow resistance which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
Selon une autre particularité, la couche arrière est un voile fibreux en tissé ou non-tissé, une couche de peinture ou encore une couche de laine minérale com- pressée, voire un film plastique, ou tout autre matériau sous forme de membrane ou film. According to another particular feature, the rear layer is a fibrous web in woven or non-woven fabric, a paint layer or even a layer of compressed mineral wool, or even a plastic film, or any other material in the form of a membrane or film.
Selon une autre particularité, la couche arrière a une épaisseur inférieure ou égale à 1 cm, de préférence inférieure ou égale à 1 mm. According to another feature, the rear layer has a thickness less than or equal to 1 cm, preferably less than or equal to 1 mm.
Selon une autre particularité, la couche arrière est micro-perforée. According to another feature, the rear layer is micro-perforated.
Selon une autre particularité, la couche arrière micro-perforée a, pour une épaisseur L, un taux de perforation f et un diamètre de perforation D tels que fϋ2 = 32h c L/(oL), où oL désigne la résistance à l’écoulement de l’air de la couche arrière micro-perforée et h la viscosité dynamique de l’air. According to another feature, the micro-perforated back layer has, for a thickness L, a perforation rate f and a perforation diameter D such that fϋ 2 = 32h c L / (oL), where oL denotes the resistance to air flow of the micro-perforated back layer and h the dynamic viscosity of the air.
Selon une autre particularité, le panneau en matériau poreux, à base de mousse ou de fibres, est un panneau en laine minérale et/ou végétale et/ou synthé tique, un panneau en mousse à porosité ouverte ou encore un panneau de fibres agglomérées obtenu par voie humide. According to another particular feature, the panel of porous material, based on foam or fibers, is a panel of mineral and / or vegetable and / or synthetic wool, a panel of open porosity foam or else a panel of agglomerated fibers obtained. wet.
Selon une autre particularité, le panneau en matériau poreux a une densité de surface comprise entre 0,8 kg/m2 et 10 kg/m2. According to another feature, the panel of porous material has a surface density of between 0.8 kg / m 2 and 10 kg / m 2 .
Selon une autre particularité, le panneau en matériau poreux a une résistivité à l’écoulement d’air comprise entre 30 kPa.s/m2 et 120 kPa.s/m2, de préférence entre 50 kPa.s/m2 et 110 kPa.s/m2, voire entre 50 kPa.s/m2 et 100 kPa.s/m2, ou en core entre 50 kPa.s/m2 et 90 kPa.s/m2, voire entre 50 kPa.s/m2 et 80 kPa.s/m2 According to another feature, the panel of porous material has an air flow resistivity of between 30 kPa.s / m 2 and 120 kPa.s / m 2 , preferably between 50 kPa.s / m 2 and 110 kPa.s / m2, or even between 50 kPa.s / m 2 and 100 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 90 kPa.s / m 2 , or even between 50 kPa.s / m 2 / m 2 and 80 kPa.s / m 2
Selon une autre particularité, le panneau en matériau poreux a un module d’Young compris entre 0,1 MPa et 4 MPa, de préférence entre 0,5 et 4 MPa, de façon encore plus préférée entre 0,8 et 4 MPa, voire entre 1 ,2 MPa et 4 MPa, ou encore entre 1 ,5 MPa et 4 MPa, ou entre 2 MPa et 4 MPa. According to another feature, the panel made of porous material has a Young's modulus of between 0.1 MPa and 4 MPa, preferably between 0.5 and 4 MPa, even more preferably between 0.8 and 4 MPa, or even between 1, 2 MPa and 4 MPa, or else between 1, 5 MPa and 4 MPa, or between 2 MPa and 4 MPa.
Selon une autre particularité, le panneau en matériau poreux a une épaisseur comprise entre 10 mm et 60 mm. According to another feature, the panel of porous material has a thickness of between 10 mm and 60 mm.
Selon une autre particularité, le produit d’isolation acoustique comprend en outre une deuxième couche, dite couche avant, sous forme d’un voile, d’une mem brane, d’un film, d’une peinture ou d’un enduit de plâtre, liée ou collée sur la face avant du panneau en matériau poreux, cette couche avant ayant une résistance à l’écoulement de l’air inférieure ou égale à 1 kPa.s/m, de préférence inférieure ou égale à 0,5 kPa.s/m. According to another feature, the sound insulation product further comprises a second layer, called the front layer, in the form of a veil, a membrane, a film, a paint or a coating of plaster, bonded or glued to the front face of the panel of porous material, this front layer having a resistance to air flow less than or equal to 1 kPa.s / m, preferably less than or equal to 0.5 kPa.s / m.
Selon une autre particularité, le produit d’isolation acoustique est destiné à être utilisé comme dalle de plafond acoustique sur une armature suspendue à un plafond avec un plénum entre le produit d’isolation acoustique et le plafond. According to another feature, the sound insulation product is intended for use as an acoustic ceiling tile on a frame suspended from a ceiling with a plenum between the sound insulation product and the ceiling.
Le produit d’isolation acoustique peut également remplir une fonction d’iso lation thermique, notamment dans le cas de systèmes de plafond ou de murthermo- régulant (chauffant et/ou rafraîchissant). Cette forme de réalisation est également comprise dans l’invention. The sound insulation product can also fulfill a thermal insulating function, in particular in the case of ceiling systems or of furthermoregulating (heating and / or cooling). This embodiment is also included in the invention.
L’invention concerne également un système d’isolation acoustique suspendu sous un plafond ou en avant d’une paroi murale, comprenant une structure de sus pension d’un parement isolant à distance du plafond ou de la paroi murale, dans lequel le parement comprend au moins un produit d’isolation acoustique selon l’in vention, la couche arrière étant orientée vers le plafond ou la paroi murale. The invention also relates to an acoustic insulation system suspended from a ceiling or in front of a wall, comprising a structure for suspending an insulating facing away from the ceiling or from the wall wall, in which the facing comprises at least one sound insulation product according to the invention, the rear layer being oriented towards the ceiling or the wall wall.
L’invention concerne également une utilisation du produit d’isolation acous tique selon l’invention comme dalle de plafond acoustique sur une armature sus pendue à un plafond avec un plénum entre le produit d’isolation acoustique et le plafond, la couche arrière étant orientée vers le plafond ou la paroi murale. The invention also relates to a use of the acoustic insulation product according to the invention as an acoustic ceiling tile on a frame suspended from a ceiling with a plenum between the acoustic insulation product and the ceiling, the rear layer being oriented. towards the ceiling or wall.
D’autres caractéristiques et avantages de l’invention vont à présent être dé- crits en regard des dessins sur lesquels : Other features and advantages of the invention will now be described with reference to the drawings in which:
• La Fig. 1 représente une vue en coupe d’un produit d’isolation acous tique selon l’invention ; • Fig. 1 shows a sectional view of an acoustic insulation product according to the invention;
• La Fig. 2 représente une vue en coupe d’un produit d’isolation acous tique dans son utilisation comme dalle de plafond suspendu. • Fig. 2 shows a sectional view of an acoustic insulation product in its use as a suspended ceiling tile.
Les numéros de référence qui sont identiques sur les différentes figures re présentent des éléments similaires ou identiques. The reference numbers which are identical in the various figures show similar or identical elements.
L’invention se rapporte à un produit d’isolation acoustique comprenant : The invention relates to an acoustic insulation product comprising:
- un panneau en matériau poreux, notamment à base de mousse ou de fibres comprenant une première face, dite face arrière, destinée à être tournée vers une paroi telle qu’un plafond ou un mur, et une deuxième face, dite face avant, située à l’opposé de la face arrière, a panel made of porous material, in particular based on foam or fibers comprising a first face, called the rear face, intended to be turned towards a wall such as a ceiling or a wall, and a second face, called the front face, located opposite the back side,
- une couche, dite couche arrière, qui adhère ou est liée ou couplée au moins en partie à la face arrière du panneau en matériau poreux, la couche arrière ayant une résistance à l’écoulement de l’air qui est comprise entre 5 kPa.S/m et 20 kPa.s/m, de préférence entre 7 kPa.s/m et 15 kPa.s/m. a layer, called the rear layer, which adheres to or is bonded or coupled at least in part to the rear face of the panel made of porous material, the rear layer having an air flow resistance which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
La mesure de la résistance à l’écoulement d’air est réalisée selon la norme ISO 9053. The air flow resistance measurement is performed according to ISO 9053.
La résistance à l’écoulement de l’air de la couche arrière selon l’invention est représentative d’une capacité limitée de passage de l’air à travers celle-ci, qui peut être liée à la présence de pores de petite taille dans la couche. La résistance à l’écoulement de l’air de la couche arrière étant comprise entre 5 kPa.s/m et 20 kPa.s/m, elle introduit une dissipation d’énergie par frottement visqueux de l’air mis en mouvement par l’onde acoustique. Lorsque les ondes acoustiques non dis sipées dans le panneau en matériau poreux et dans la couche arrière passent dans le plénum, elles subissent des réflexions multiples. Lors de ces réflexions multiples, une partie des ondes acoustiques est réfléchie sur la couche arrière et est absorbée par cette dernière grâce à la résistance à l’écoulement de la couche arrière, contrai- rement au cas où la couche arrière serait étanche. Ainsi, l’absorption est fortement améliorée, notamment à basses fréquences. The resistance to air flow of the back layer according to the invention is representative of a limited capacity for air to pass through it, which may be linked to the presence of small pores in layer. The resistance to air flow of the rear layer being between 5 kPa.s / m and 20 kPa.s / m, it introduces an energy dissipation by viscous friction of the air set in motion by the acoustic wave. When the acoustic waves not dissipated in the panel of porous material and in the back layer pass into the plenum, they undergo multiple reflections. During these multiple reflections, some of the acoustic waves are reflected on the back layer and are absorbed by the latter thanks to the flow resistance of the back layer, unlike in the case where the back layer is waterproof. Thus, absorption is greatly improved, especially at low frequencies.
L’invention surmonte également un travers des voiles arrières étanche de l’art antérieur qui, en formant une face presque parfaitement réfléchissante pour les ondes acoustiques, amplifient l’énergie des modes de résonance dans le plénum. The invention also overcomes a cross section of the sealed rear wings of the prior art which, by forming an almost perfectly reflective face for acoustic waves, amplifies the energy of the resonance modes in the plenum.
Au contraire, la résistance à l’écoulement de l’air de la couche arrière selon l’invention autorise une partie des ondes acoustiques à passer à travers celle-ci. L’isolation acoustique entre la salle et le plénum est donc légèrement dégradé. Tou tefois, la résistance à l’écoulement de l’air de la couche arrière est choisie de ma nière à ne pas dégrader l’isolation acoustique, c’est-à-dire à garder les effets iner- tiels du panneau en matériau poreaux. En outre, comme une partie des ondes acoustiques est dissipée dans la couche arrière, l’intensité des ondes acoustiques qui est réfléchie dans le plénum, est moindre et l’isolation acoustique entre deux salles voisines est améliorée. La dissipation apportée dans le plénum par la couche arrière réduit la propagation des ondes dans ce même plénum. Ce phénomène compense la perte d’effet inertiel dû au passage dans la couche arrière et permet, quand la résistance à l’écoulement de la couche arrière est avantageusement choi sie dans la gamme selon l’invention, d’améliorer l’isolation acoustique Dnf d’une pièce à l’autre. Ainsi, le produit d’isolation acoustique selon l’invention permet bien d’amélio rer à la fois l’isolation acoustique et l’absorption acoustique. On the contrary, the resistance to air flow of the rear layer according to the invention allows part of the acoustic waves to pass through it. The sound insulation between the room and the plenum is therefore slightly degraded. However, the resistance to air flow of the rear layer is chosen so as not to degrade the sound insulation, that is to say to keep the inert effects of the porous material panel. . In addition, as part of the acoustic waves are dissipated in the back layer, the intensity of the acoustic waves which is reflected in the plenum is less and the sound insulation between two neighboring rooms is improved. The dissipation provided in the plenum by the rear layer reduces the propagation of waves in this same plenum. This phenomenon compensates for the loss of inertial effect due to the passage through the rear layer and makes it possible, when the flow resistance of the rear layer is advantageously chosen from the range according to the invention, to improve the sound insulation D nf from one room to another. Thus, the sound insulation product according to the invention indeed makes it possible to improve both sound insulation and sound absorption.
La figure 1 représente une vue en coupe d’un produit d’isolation acoustique selon l’invention. Le produit d’isolation acoustique 5 comprend un panneau en ma- tériau poreux 1 , notamment à base de mousse ou de fibres. Ainsi, le panneau en matériau poreux 1 est par exemple un panneau en laine minérale et/ou végétale et/ou synthétique, un panneau en mousse à porosité ouverte ou encore un panneau de fibres agglomérées obtenu par voie humide tel que des fibres minérales et/ou de cellulose mises en forme par suspension avec un liant minéral ou organique. Figure 1 shows a sectional view of a sound insulation product according to the invention. The sound insulation product 5 comprises a panel made of porous material 1, in particular based on foam or fibers. Thus, the panel of porous material 1 is for example a panel of mineral and / or vegetable and / or synthetic wool, a panel of foam with open porosity or else a panel of agglomerated fibers obtained by the wet process such as mineral fibers and / or. or cellulose shaped by suspension with an inorganic or organic binder.
Le panneau en matériau poreux a une première face principale, dite face arrière 20, destinée à être tournée vers une paroi, qui peut être un plafond (7 sur la figure 2) ou un mur, et une deuxième face, dite face avant 30, située à l’opposé de la face arrière 20. La face avant est destinée à être tournée vers l’intérieur d’une salle, d’une pièce (4 sur la figure 2) ou encore d’un couloir. The porous material panel has a first main face, called the rear face 20, intended to face a wall, which may be a ceiling (7 in FIG. 2) or a wall, and a second face, called the front face 30, located opposite the rear face 20. The front face is intended to face the interior of a room, a room (4 in FIG. 2) or even a corridor.
Le produit d’isolation acoustique 5 comprend en outre une couche, dite couche arrière 2, qui adhère ou est liée ou couplée au moins en partie à la face arrière 20 du panneau en matériau poreux 1. La liaison ou l’adhésion est réalisée de préférence par collage, par exemple sous forme de plots ou de traits de colle. L’ensemble de la surface de la couche arrière n’est pas nécessairement enduite de colle. La couche arrière 2 est par exemple un voile fibreux en tissé ou non-tissé, une couche de peinture ou encore une couche de laine minérale compressée, voire un film plastique ou tout type de matériau sous forme d’un film ou d’un membrane. Lorsque la couche arrière 2 est une couche de peinture, celle-ci est déposée sur le panneau en matériau poreux 1 sous forme liquide et mise à sécher. Il n’y a alors pas d’étape de collage, mais une étape d’enduction par un primaire peut avoir lieu La peinture peut éventuellement contenir un agent porogène pour procurer la résis tance au passage de l’air adéquate. The sound insulation product 5 further comprises a layer, called the rear layer 2, which adheres to or is bonded or coupled at least in part to the rear face 20 of the panel made of porous material 1. The bond or adhesion is made from preferably by gluing, for example in the form of spots or lines of glue. The entire surface of the back layer is not necessarily coated with glue. The rear layer 2 is for example a fibrous web in woven or non-woven fabric, a layer of paint or even a layer of compressed mineral wool, or even a plastic film or any type of material in the form of a film or a membrane. . When the rear layer 2 is a layer of paint, the latter is deposited on the panel made of porous material 1 in liquid form and left to dry. There is then no bonding step, but a coating step with a primer can take place. The paint can optionally contain a pore-forming agent to provide adequate resistance to the passage of air.
La couche arrière 2 a une résistance à l’écoulement de l’air qui est comprise entre 5 kPa.s/m et 20 kPa.s/m pour permettre l’amélioration à la fois de l’absorption acoustique, en particulier aux basses fréquences, et de l’isolation acoustique, comme expliqué plus haut. C’est cette gamme bien choisie de la résistance à l’écou lement de l’air qui permet cet effet technique. En effet, en dessous de 5 kPa.s/m, l’isolation acoustique est dégradée. Au-dessus de 20 kPa.s/m, il n’y a plus de gain en absorption. De préférence, la résistance à l’écoulement de l’air est comprise entre 7 kPa.s/m et 15 kPa.s/m, ce qui permet d’améliorer encore plus l’absorption acoustique et l’isolation acoustique. La mesure de la résistance à l’écoulement d’air est réalisée selon la norme ISO 9053. The back layer 2 has an air flow resistance which is between 5 kPa.s / m and 20 kPa.s / m to allow improvement in both sound absorption, especially at bass frequencies, and sound insulation, as explained above. It is this well chosen range of resistance to air flow which enables this technical effect. Indeed, below 5 kPa.s / m, the sound insulation is degraded. Above 20 kPa.s / m, there is no longer any gain in absorption. Preferably the resistance to air flow is included between 7 kPa.s / m and 15 kPa.s / m, which further improves sound absorption and sound insulation. The air flow resistance measurement is carried out according to ISO 9053.
La couche arrière a par exemple une épaisseur inférieure ou égale à 1 cm, de préférence inférieure ou égale à 1 mm. The rear layer has for example a thickness less than or equal to 1 cm, preferably less than or equal to 1 mm.
Dans un mode de réalisation particulier représenté sur la figure 1 , la couche arrière 2 peut être micro-perforée, c’est-à-dire que des micro-perforations 4 sont percées à travers la couche arrière 2. Ces micro-perforations 4 peuvent par exemple être percées dans une couche arrière 2 déjà en place sur le panneau en matériau poreux 1 , ce qui a l’avantage de ne pas obturer les micro-perforations 4 lors du collage de la couche arrière 2 sur le panneau en matériau poreux 1. Dans ce mode de réalisation, les micro-perforations 4 peuvent être réalisées dans une couche ar rière 2 constituée d’un voile de fibres dit étanche (ayant une résistance à l’écoule ment de l’air avant perforation supérieure à 50 kPa.s/m) de façon à lui donner une résistance à l’écoulement de l’air après perforation qui soit comprise entre 5 kPa.s/m et 20 kPa.s/m, de préférence entre 7 kPa.s/m et 15 kPa.s/m. In a particular embodiment shown in FIG. 1, the rear layer 2 can be micro-perforated, that is to say that micro-perforations 4 are pierced through the rear layer 2. These micro-perforations 4 can be perforated. for example, be drilled in a rear layer 2 already in place on the porous material panel 1, which has the advantage of not blocking the micro-perforations 4 when bonding the rear layer 2 on the porous material panel 1 In this embodiment, the micro-perforations 4 can be produced in a rear layer 2 made up of a so-called impermeable veil of fibers (having a resistance to the flow of air before perforation of greater than 50 kPa. s / m) so as to give it a resistance to air flow after perforation which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
Lorsque la couche arrière 2 est micro-perforée, elle a par exemple, pour une épaisseur L, un taux de perforation f et un diamètre de perforation D tels que : fϋ2 = 32h x U (oL) When the rear layer 2 is micro-perforated, it has for example, for a thickness L, a perforation rate f and a perforation diameter D such that: fϋ 2 = 32h x U (oL)
où oL désigne la résistance à l’écoulement de l’air de la couche arrière micro- perforée et h la viscosité dynamique de l’air. where oL denotes the airflow resistance of the micro-perforated back layer and h the dynamic viscosity of air.
En variante, la couche arrière peut être percée de micro-perforations multi- diamètres. As a variant, the back layer can be pierced with multi-diameter micro-perforations.
En outre, le panneau en matériau poreux 1 a de préférence une densité de surface comprise entre 0,8 kg/m2 et 10 kg/m2, de façon à avoir une tenue méca nique suffisante pour une application en dalle de plafond tout en n’étant pas trop lourd. In addition, the panel made of porous material 1 preferably has a surface density of between 0.8 kg / m 2 and 10 kg / m 2 , so as to have sufficient mechanical strength for application as a ceiling tile while at the same time not being too heavy.
Le panneau en matériau poreux 1 a de préférence une résistivité à l’écoule ment d’air comprise entre 30 kPa.s/m2 et 120 kPa.s/m2 de façon à absorber les ondes acoustiques. De façon préférée, le panneau en matériau poreux 1 a une ré sistivité à l’écoulement d’air comprise entre 50 kPa.s/m2 et 110 kPa.s/m2, voire entre 50 kPa.s/m2 et 100 kPa.s/m2, ou encore entre 50 kPa.s/m2 et 90 kPa.s/m2, voire entre 50 kPa.s/m2 et 80 kPa.s/m2, pour améliorer son absorption acoustique. La mesure de la résistivité à l’écoulement d’air est obtenue en divisant la résistance à l’écoulement de l’air du panneau par son épaisseur. The panel made of porous material 1 preferably has an air flow resistivity of between 30 kPa.s / m 2 and 120 kPa.s / m 2 so as to absorb acoustic waves. Preferably, the panel made of porous material 1 has an air flow resistance of between 50 kPa.s / m 2 and 110 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 100 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 90 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 80 kPa.s / m 2 , to improve sound absorption. The airflow resistivity measurement is obtained by dividing the airflow resistance of the panel by its thickness.
Le panneau en matériau poreux 1 a également de préférence un module d’Young compris entre 0,1 MPa et 4 MPa de façon à apporter une isolation acous- tique. De façon préférée, le panneau en matériau poreux 1 a un module d’Young compris entre 0,5 MPa et 4 MPa, de façon encore plus préférée entre 0,8 MPa et 4 MPa, voire entre 1 ,2 MPa et 4 MPa, ou encore entre 1 ,5 MPa et 4 MPa, ou entre 2 MPa et 4 MPa pour améliorer son isolation acoustique. La mesure du module d’Young est réalisée selon la norme ISO 18437 et selon l’article de C. Langlois, R. Panneton et N. Atalla : Polynomial relations for quasi-static mechanical characteri- zation of isotropie poroelastic materials, J. Acoust. Soc. Am., 110:3032-3040, 2001. The panel of porous material 1 also preferably has a Young's modulus of between 0.1 MPa and 4 MPa so as to provide sound insulation. Preferably, the panel made of porous material 1 has a Young's modulus of between 0.5 MPa and 4 MPa, even more preferably between 0.8 MPa and 4 MPa, or even between 1.2 MPa and 4 MPa, or alternatively between 1.5 MPa and 4 MPa, or between 2 MPa and 4 MPa to improve its sound insulation. The Young's modulus is measured according to the ISO 18437 standard and according to the article by C. Langlois, R. Panneton and N. Atalla: Polynomial relations for quasi-static mechanical characterization of isotropy poroelastic materials, J. Acoust . Soc. Am., 110: 3032-3040, 2001.
Le panneau en matériau poreux 1 en outre de préférence a une épaisseur comprise entre 10 mm et 60 mm. Cette gamme d’épaisseur permet une bonne te nue mécanique du panneau et une absorption suffisante des ondes acoustiques pour une application en dalle de plafond. The porous material panel 1 further preferably has a thickness of between 10 mm and 60 mm. This range of thickness allows a good mechanical shade of the panel and sufficient absorption of acoustic waves for a ceiling tile application.
Le produit d’isolation acoustique 5 comprend en outre de préférence une deuxième couche, dite couche avant 3, sous forme d’un voile, d’une membrane, d’un film, d’une peinture ou d’un enduit de plâtre, liée ou collée sur la face avant 30 du panneau en matériau poreux 1. Cette couche avant a une fonction décor avant tout. Elle a une résistance à l’écoulement de l’air qui est inférieure ou égale à 1 kPa.s/m, de préférence inférieure ou égale à 0,5 kPa.s/m, de façon à laisser suf fisamment d’air entrer dans le panneau en matériau poreux 1 afin de permettre une absorption et une isolation acoustique par le panneau en matériau poreux 1 et par la couche arrière 2. The sound insulation product 5 further preferably comprises a second layer, called the front layer 3, in the form of a veil, a membrane, a film, a paint or a plaster coating, bound or glued to the front face 30 of the panel made of porous material 1. This front layer has a decorative function above all. It has an air flow resistance which is less than or equal to 1 kPa.s / m, preferably less than or equal to 0.5 kPa.s / m, so as to allow sufficient air to enter in the porous material panel 1 in order to allow absorption and sound insulation by the porous material panel 1 and by the rear layer 2.
Le produit d’isolation acoustique 5 procure également, de préférence, une isolation thermique. The sound insulation product 5 also preferably provides thermal insulation.
Deux produits d’isolation acoustique ont été testés en absorption acoustique et en isolation acoustique : un produit de référence et un produit selon l’invention. Two sound insulation products have been tested for sound absorption and sound insulation: a reference product and a product according to the invention.
Le produit d’isolation acoustique de référence testé comprend un panneau en laine minérale de densité de surface 5 kg/m2, d’épaisseur 50 mm, de module d’Young 0,65 MPa et une résistivité à l’écoulement de l’air de 85 kPa.s/m, un voile arrière en fibres de verre non-tissé ayant une résistance à l’écoulement de l’air de 70 kPa.s/m et une épaisseur de 0,6 mm, et un voile avant ayant une résistance à l’écoulement de l’air de 0,5 kPa.s/m. Le produit d’isolation acoustique selon l’invention est le même produit, dans lequel le voile arrière a en outre été percé de micro-perforations de diamètre 0,18 mm, avec un taux de perforation de 0,15 %. La résistance à l’écoulement de l’air du voile arrière micro-perforé a été mesurée à 7,5 kPa.s/m. The benchmark sound insulation product tested includes a mineral wool panel with a surface density of 5 kg / m 2 , thickness 50 mm, Young's modulus 0.65 MPa and a flow resistivity of air of 85 kPa.s / m, a rear non-woven glass fiber web having an air flow resistance of 70 kPa.s / m and a thickness of 0.6 mm, and a front web having an air flow resistance of 0.5 kPa.s / m. The acoustic insulation product according to the invention is the same product, in which the rear wall has also been pierced with micro-perforations of 0.18 mm diameter, with a perforation rate of 0.15%. The resistance to air flow of the micro-perforated rear wall was measured at 7.5 kPa.s / m.
L’absorption acoustique et l’isolation acoustique ont été mesurées sur les deux produits. L’absorption acoustique est mesurée selon la norme ISO 354. L’in dicateur aw est ensuite calculé selon la norme ISO 11654. Dans toute la demande, les mesures ont été réalisées avec un plénum de 200 mm en hauteur de construc tion. Sound absorption and sound insulation were measured on both products. The sound absorption is measured according to the ISO 354 standard. The aw indicator is then calculated according to the ISO 11654 standard. Throughout the application, the measurements were carried out with a plenum of 200 mm in construction height.
L’isolation acoustique est mesurée selon la norme ISO 10848-1. L’indicateur Sound insulation is measured according to ISO 10848-1. The indicator
Dnf est ensuite calculé selon la norme ISO 717-1. Dans toute la demande, les me sures ont été réalisées avec un plénum de 700 mm en hauteur de construction. D nf is then calculated according to the ISO 717-1 standard. Throughout the request, the measurements were carried out with a plenum of 700 mm in construction height.
Il a été observé un gain en absorption acoustique (as et aw) de 0,05 sur toute la gamme de fréquences comprise entre 100 Hz et 5000 Hz et un gain en isolation de +1 dB environ sur le Dnf,w entre le produit d’isolation acoustique selon l’invention, dont le voile arrière une résistance à l’écoulement de l’air de 7,5 kPa.s/m, et le pro duit d’isolation acoustique de référence, dont le voile arrière une résistance à l’écou lement de l’air de 100 kPa.s/m. A gain in sound absorption (as and aw) of 0.05 was observed over the entire frequency range between 100 Hz and 5000 Hz and an insulation gain of approximately +1 dB on the D nf, w between the product of sound insulation according to the invention, of which the rear wall has an air flow resistance of 7.5 kPa.s / m, and the reference sound insulation product, of which the rear wall has a resistance to air flow of 100 kPa.s / m.
Il a donc été mis en évidence que le produit d’isolation acoustique selon l’in- vention permet bien d’améliorer à la fois l’isolation acoustique et l’absorption acous tique. It has therefore been demonstrated that the acoustic insulation product according to the invention does indeed improve both the acoustic insulation and the acoustic absorption.
Le produit d’isolation acoustique 5 est de préférence destiné à être utilisé comme dalle de plafond suspendu. Il peut aussi être utilisé comme parement acous tique sur n’importe quelle autre paroi, par exemple sur un mur. Un plénum entre le produit d’isolation acoustique et la paroi permet une utilisation optimale de celui-ci. The sound insulation product 5 is preferably intended for use as a suspended ceiling tile. It can also be used as an acoustic cladding on any other wall, for example on a wall. A plenum between the sound insulation product and the wall allows optimal use of it.
La figure 2 représente une vue en coupe d’un produit d’isolation acoustique dans son utilisation comme dalle de plafond suspendu. Figure 2 shows a sectional view of a sound insulation product in use as a suspended ceiling tile.
La figure 2 représente un plafond suspendu comprenant une armature mé tallique 7 fixée à une paroi de plafond et munie à son extrémité inférieure d’un re- bord 9 sur lequel reposent les dalles de plafond, chaque dalle de plafond étant for mée d’un produit d’isolation acoustique 5 selon l’invention. Un plénum 6 est présent entre la paroi 7 du plafond et la surface supérieure du produit d’isolation acoustique 5, à savoir la couche arrière 2. La face arrière 20 du produit d’isolation acoustique 5, recouverte de la couche arrière 2, est orientée vers la paroi 7 du plafond. La face avant 30 du produit d’isolation acoustique 5, recouverte ici d’un voile avant 3, est orientée vers l’intérieur d’une salle 4. FIG. 2 shows a suspended ceiling comprising a metal frame 7 fixed to a ceiling wall and provided at its lower end with a ledge 9 on which the ceiling tiles rest, each ceiling tile being formed of a acoustic insulation product 5 according to the invention. A plenum 6 is present between the wall 7 of the ceiling and the upper surface of the sound insulation product 5, namely the rear layer 2. The rear face 20 of the sound insulation product 5, covered with the rear layer 2, is oriented towards the wall 7 of the ceiling. The face front 30 of the soundproofing product 5, covered here with a front panel 3, is oriented towards the interior of a room 4.
L’invention concerne également une utilisation du produit d’isolation t acous tique 5 comme dalle de plafond acoustique sur une armature 8 suspendue à un plafond 7 avec un plénum 6 entre le produit d’isolation acoustique 5 et le plafond 7, ainsi qu’un système d’isolation acoustique correspondant. L’invention concerne également u système d’isolation acoustique mural. The invention also relates to a use of the acoustic insulation product 5 as an acoustic ceiling tile on a frame 8 suspended from a ceiling 7 with a plenum 6 between the acoustic insulation product 5 and the ceiling 7, as well as a corresponding sound insulation system. The invention also relates to a wall sound insulation system.

Claims

REVENDICATIONS
1 . Produit d’isolation acoustique (5) comprenant : 1. Sound insulation product (5) comprising:
- un panneau en matériau poreux (1 ), notamment à base de mousse ou de fibres, comprenant une première face, dite face arrière (20), destinée à être tournée vers une paroi telle qu’un plafond ou un mur, et une deuxième face, dite face avant (30), située à l’opposé de la face arrière (20), - a panel of porous material (1), in particular based on foam or fibers, comprising a first face, called the rear face (20), intended to face a wall such as a ceiling or a wall, and a second face, called the front face (30), located opposite the rear face (20),
- une couche, dite couche arrière (2), qui adhère ou est liée ou couplée au moins en partie à la face arrière (20) du panneau en matériau poreux (1 ), la couche arrière (2) ayant une résistance à l’écoulement de l’air qui est comprise entre 5 kPa.s/m et 20 kPa.s/m, de préférence entre 7 kPa.s/m et 15 kPa.s/m. - a layer, called the rear layer (2), which adheres to or is bonded or coupled at least in part to the rear face (20) of the panel made of porous material (1), the rear layer (2) having a resistance to air flow which is between 5 kPa.s / m and 20 kPa.s / m, preferably between 7 kPa.s / m and 15 kPa.s / m.
2. Produit d’isolation acoustique (5) selon la revendication 1 , dans lequel la couche arrière (2) est un voile fibreux en tissé ou non-tissé, une couche de peinture ou encore une couche de laine minérale compressée, voire un film plastique ou tout matériau sous forme d’un film ou d’une membrane. 2. Sound insulation product (5) according to claim 1, wherein the rear layer (2) is a fibrous web in woven or non-woven fabric, a paint layer or a layer of compressed mineral wool, or even a film. plastic or any material in the form of a film or membrane.
3. Produit d’isolation acoustique (5) selon la revendication 1 ou 2, dans lequel la couche arrière (2) a une épaisseur inférieure ou égale à 1 cm, de préférence inférieure ou égale à 1 mm. 3. Sound insulation product (5) according to claim 1 or 2, wherein the rear layer (2) has a thickness less than or equal to 1 cm, preferably less than or equal to 1 mm.
4. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 3, dans lequel la couche arrière (2) est micro-perforée. 4. Sound insulation product (5) according to one of claims 1 to 3, wherein the back layer (2) is micro-perforated.
5. Produit d’isolation acoustique (5) selon la revendication 4, dans lequel la couche arrière (2) micro-perforée a, pour une épaisseur L, un taux de perforation f et un diamètre de perforation D tels que fϋ2 = 32h c L/(oL), où oL désigne la résis tance à l’écoulement de l’air de la couche arrière micro-perforée et h la viscosité dynamique de l’air. 5. Sound insulation product (5) according to claim 4, wherein the rear layer (2) has micro-perforated, for a thickness L, a perforation rate f and a perforation diameter D such that fϋ 2 = 32h c L / (oL), where oL denotes the resistance to air flow of the micro-perforated back layer and h the dynamic viscosity of the air.
6. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 5, dans lequel le panneau en matériau poreux (1 ), à base de mousse ou de fibres, est un panneau en laine minérale et/ou végétale et/ou synthétique, un panneau en mousse à porosité ouverte ou encore un panneau de fibres agglomérées obtenu par voie humide. 6. Sound insulation product (5) according to one of claims 1 to 5, wherein the panel of porous material (1), based on foam or fibers, is a panel of mineral wool and / or vegetable and / or synthetic, an open porosity foam panel or else an agglomerated fiber panel obtained by wet process.
7. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 6, dans lequel le panneau en matériau poreux (1 ) a une densité de surface comprise entre 0,8 kg/m2 et 10 kg/m2. 7. Sound insulation product (5) according to one of claims 1 to 6, wherein the panel of porous material (1) has a surface density of between 0.8 kg / m 2 and 10 kg / m 2 .
8. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 7, dans lequel le panneau en matériau poreux (1 ) a une résistivité à l’écoulement d’air comprise entre 30 kPa.s/m2 et 120 kPa.s/m2, de préférence entre 50 kPa.s/m2 et 110 kPa.s/m2, voire entre 50 kPa.s/m2 et 100 kPa.s/m2, ou encore entre 50 kPa.s/m2 et 90 kPa.s/m2, voire entre 50 kPa.s/m2 et 80 kPa.s/m2 8. Sound insulation product (5) according to one of claims 1 to 7, wherein the panel of porous material (1) has a resistivity to the air flow of between 30 kPa.s / m 2 and 120 kPa.s / m 2 , preferably between 50 kPa.s / m 2 and 110 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 100 kPa.s / m 2 , or alternatively between 50 kPa .s / m 2 and 90 kPa.s / m 2 , or even between 50 kPa.s / m 2 and 80 kPa.s / m 2
9. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 8, dans lequel le panneau en matériau poreux (1 ) a un module d’Young compris entre9. Sound insulation product (5) according to one of claims 1 to 8, wherein the panel of porous material (1) has a Young's modulus of between
0,1 MPa et 4 MPa, de préférence entre 0,5 MPa et 4 MPa, de façon encore plus préférée entre 0,8 MPa et 4 MPa, voire entre 1 ,2 MPa et 4 MPa, ou encore entre0.1 MPa and 4 MPa, preferably between 0.5 MPa and 4 MPa, even more preferably between 0.8 MPa and 4 MPa, or even between 1.2 MPa and 4 MPa, or alternatively between
I ,5 MPa et 4 MPa, ou entre 2 MPa et 4 MPa. I, 5 MPa and 4 MPa, or between 2 MPa and 4 MPa.
10. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 9, dans lequel le panneau en matériau poreux (1 ) a une épaisseur comprise entre10. Sound insulation product (5) according to one of claims 1 to 9, wherein the panel of porous material (1) has a thickness between
10 mm et 60 mm. 10 mm and 60 mm.
11. Produit d’isolation acoustique (5) selon l’une des revendications 1 à 10, comprenant en outre une deuxième couche, dite couche avant (3), sous forme d’un voile, d’une membrane, d’un film, d’une peinture ou d’un enduit de plâtre, liée ou collée sur la face avant (30) du panneau en matériau poreux (1 ), cette couche avant (3) ayant une résistance à l’écoulement de l’air inférieure ou égale à 1 kPa.s/m, de préférence inférieure ou égale à 0,5 kPa.s/m. 11. Sound insulation product (5) according to one of claims 1 to 10, further comprising a second layer, said front layer (3), in the form of a web, a membrane, a film. , a paint or a plaster coating, bonded or glued to the front face (30) of the panel made of porous material (1), this front layer (3) having a lower resistance to air flow or equal to 1 kPa.s / m, preferably less than or equal to 0.5 kPa.s / m.
12. Produit d’isolation acoustique (5) selon l’une des revendications 1 à12. Sound insulation product (5) according to one of claims 1 to
I I , destiné à être utilisé comme dalle de plafond acoustique sur une armature (8) suspendue à un plafond (7) avec un plénum (6) entre le produit d’isolation acous tique (5) et le plafond (7). I I, intended for use as an acoustic ceiling tile on a frame (8) suspended from a ceiling (7) with a plenum (6) between the sound insulation product (5) and the ceiling (7).
13. Système d’isolation acoustique suspendu sous un plafond ou en avant d’une paroi murale comprenant une structure de suspension d’un parement isolant à distance du plafond (7) ou de la paroi murale, dans lequel le parement comprend au moins un produit d’isolation acoustique (5) selon l’une des revendications 1 à 12, la couche arrière (2) étant orientée vers le plafond (7) ou la paroi murale. 13. Sound insulation system suspended under a ceiling or in front of a wall comprising a structure for suspending an insulating facing away from the ceiling (7) or from the wall wall, in which the facing comprises at least one Sound insulation product (5) according to one of claims 1 to 12, the rear layer (2) being oriented towards the ceiling (7) or the wall wall.
14. Utilisation du produit d’isolation acoustique selon l’une des revendica tions 1 à 12 comme dalle de plafond acoustique sur une armature (8) suspendue à un plafond (7) avec un plénum (6) entre le produit d’isolation acoustique (5) et le plafond (7), la couche arrière (2) étant orientée vers le plafond (7). 14. Use of the sound insulation product according to one of claims 1 to 12 as an acoustic ceiling tile on a frame (8) suspended from a ceiling (7) with a plenum (6) between the sound insulation product (5) and the ceiling (7), the rear layer (2) facing the ceiling (7).
EP20716795.8A 2019-04-16 2020-04-06 Acoustic insulation product comprising a backing layer Pending EP3956528A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19169606.1A EP3725968A1 (en) 2019-04-16 2019-04-16 Acoustic insulation product comprising a rear layer
PCT/EP2020/059729 WO2020212177A1 (en) 2019-04-16 2020-04-06 Acoustic insulation product comprising a backing layer

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EP3956528A1 true EP3956528A1 (en) 2022-02-23

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EP20716795.8A Pending EP3956528A1 (en) 2019-04-16 2020-04-06 Acoustic insulation product comprising a backing layer

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EP (2) EP3725968A1 (en)
AU (1) AU2020259716A1 (en)
BR (1) BR112021020187A2 (en)
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FR3128903B1 (en) 2021-11-10 2024-04-26 Saint Gobain Vehicle glazing adapted for acoustic emission and/or reception

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US11814836B2 (en) 2023-11-14
CA3132360A1 (en) 2020-10-22
EP3725968A1 (en) 2020-10-21
WO2020212177A1 (en) 2020-10-22
AU2020259716A1 (en) 2021-11-04
BR112021020187A2 (en) 2021-12-21
US20220195723A1 (en) 2022-06-23

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