EP2318606B1 - Plaque acoustique - Google Patents

Plaque acoustique Download PDF

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Publication number
EP2318606B1
EP2318606B1 EP09800105.0A EP09800105A EP2318606B1 EP 2318606 B1 EP2318606 B1 EP 2318606B1 EP 09800105 A EP09800105 A EP 09800105A EP 2318606 B1 EP2318606 B1 EP 2318606B1
Authority
EP
European Patent Office
Prior art keywords
tile
advantageously
nonwoven material
acoustic
composition
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.)
Not-in-force
Application number
EP09800105.0A
Other languages
German (de)
English (en)
Other versions
EP2318606A1 (fr
Inventor
Joseph Dussaud
Pierrick Girard
Jean-Michel Santarella
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.)
Ahlstrom Corp
Original Assignee
Ahlstrom Corp
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Filing date
Publication date
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Publication of EP2318606A1 publication Critical patent/EP2318606A1/fr
Application granted granted Critical
Publication of EP2318606B1 publication Critical patent/EP2318606B1/fr
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    • 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
    • E04B1/86—Sound-absorbing elements slab-shaped
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet
    • Y10T428/24331—Composite web or sheet including nonapertured component

Definitions

  • the object of the invention is a new perforated acoustic tile that presents the advantage of ensuring air pollution removal under visible and ultraviolet light irradiation, particularly by photocatalysis.
  • Acoustic tiles are well known products that are intended to be applied to walls or ceilings.
  • the acoustic tiles related to the invention are perforated acoustic tile supports that are covered on their entire rear surface, that is, their non-visible face, with a nonwoven material.
  • the support may vary and generally is most often in the form of plaster boards, but also, in certain cases, in the form of metal boards, wood boards or PVC boards and, more generally, in any type of material.
  • the boards of the invention have numerous applications, particularly in public buildings, train stations, airports, hospitals, nurseries, offices, etc.
  • the principle of photocatalysis consisting of destroying various organic pollutants in air is also a well known principle.
  • the photocatalytic reaction is initiated by activating a semi-conductive solid and particularly TiO 2 by UV radiation with a wavelength of less than 380 nm or visible radiation (depending on the characteristics of the TiO 2 ), causing electronic changes within the semiconductor and leading to, in the presence of air, the creation of oxygenated radicals at the surface of the semiconductor.
  • These radicals attack the organic compounds adsorbed on the semiconductor and, by a succession of chemical reactions involving water and oxygen from the air, degrade the organic compounds until the carbon from the carbon chains is completely transformed into carbon dioxide.
  • Document DE-U1-20102074 describes an acoustic tile consisting of a perforated support to the reverse face of which a continuous sheet of plastic or aluminum is applied and the front side of which is provided with a waterproof sheet capable of receiving an 'acoustic treatment'.
  • the nature of the treatment or the sheet itself is not discussed. In any case, due to the waterproof character of the sheet, it cannot be a nonwoven support.
  • Document US-A-5 674 594 discloses an acoustic tile comprising a perforated support wherein one of the surfaces is covered on its entire surface with a nonwoven material, wherein the nonwoven material is covered on at least one face by a photocatalytic composition comprising at least one photocatalyst agent.
  • the Applicant is focused on the development of an acoustic tile that removes pollution by the photocatalysis phenomenon, which does not present the disadvantages of the tiles described in document WO-A1-99/51345 .
  • the aim of the invention is to provide an acoustic tile that can be painted without losing its cleaning capacity.
  • the Applicant has observed that in a completely surprising manner, the application of TiO 2 directly onto the nonwoven material of the tile confers a particularly effective pollution removing activity to said tile.
  • the object of the invention is an acoustic tile comprising a perforated support in which one of the faces is covered by a nonwoven material over its entire surface and the face of the nonwoven material facing the perforated support being covered with a photocatalytic composition.
  • the tile is characterized in that at least the face of the nonwoven material facing the perforated support is covered by a photocatalytic composition comprising at least one photocatalytic agent.
  • the invention consists of applying the photocatalytic composition not on the front face of the tile, directly on the support, but on the face of the nonwoven material arranged onto the rear face of the tile.
  • the photocatalytic composition is not on the front face of the tile, directly on the support, but on the face of the nonwoven material arranged onto the rear face of the tile.
  • the radiation spectrum is comprised of UV and visible light allowing the photocatalysis phenomenon to be activated.
  • application of the photocatalytic composition on the sheet material instead of the tile does not affect in any way the acoustic properties of the tile only existing due to presence of the holes.
  • composition based on at least one photocatalytic agent is applied on at least one of the material faces.
  • the composition is applied to the surface of the nonwoven material facing the support.
  • the composition is applied at a rate of 2 to 50 g/m 2 , advantageously on the order of 4 to 12 g/m 2 .
  • Application of the layer is particularly carried out by coating, spraying or an equivalent method.
  • the composition is applied to the two faces of the nonwoven material, in particular by impregnation or an equivalent method.
  • the photocatalytic composition is applied at a rate of 2 to 100 g/m 2 , advantageously between 8 and 20 g/m 2 .
  • this contains, in addition to the photocatalytic agent, at least one binding agent, in particular an inorganic binding agent.
  • the photocatalytic agent is particularly chosen from the group comprising metallic oxides, alkaline-earth oxides, actinide oxides and rare earth oxides.
  • the photocatalytic agent is titanium dioxide (TiO 2 ), preferably anatase.
  • the titanium dioxide particles have a diameter of between 10 and 30 nm.
  • the TiO 2 has a specific surface area greater than 225 m 2 /g and a particle size on the order of 15 nm.
  • the TiO 2 is the TiO 2 sold by the Kronos company under the brand KRONOS® VLP 7000.
  • the photocatalytic composition contains, in addition, adsorbent particles such as, for example, zeolite.
  • adsorbent particles such as, for example, zeolite represent in practice between 1 and 50% by weight of the photocatalytic composition, advantageously between 5 and 25%.
  • the inorganic binder it is advantageously present in the form of an aqueous colloidal dispersion of silicon dioxide comprising silica particles able to be bound to one another after having coated the photocatalytic agent.
  • aqueous colloidal dispersion of silicon dioxide SiO 2 refers to a negatively charged dispersion of amorphous silica particles, with a high specific surface area, in water.
  • the specific surface area of the silica particles is greater than 80 m 2 /g, advantageously 100 m 2 /g for a particle size of between 25 and 30 nm. Furthermore, it is greater than 300 m 2 /g, advantageously 350 m 2 /g for a particle size of between 4 and 6 nm.
  • the silica particles present OH groups and OH - ions, which form a double electric layer, conferring self-bonding properties to said particles.
  • the particles of SiO 2 represent from 20 to 50% by weight of the aqueous colloidal dispersion and have a diameter of between 10 and 50 nm, preferably of between 20 and 30 nm.
  • a photocatalytic composition containing from 10 to 60 parts (dry), advantageously 50 dry parts of an aqueous colloidal dispersion of SiO 2 containing between 20 and 50% by weight of SiO 2 with a size of between 10 and 50 nm, advantageously of between 20 and 30 nm, the complement to 100% being constituted of TiO 2 and, if necessary, of adsorbent particles.
  • the complement to 100% is constituted of 25 to 45 parts of TiO 2 and from 5 to 25 parts of adsorbent particles, such as, in particular, zeolite.
  • the photocatalytic composition may also contain pigments, particularly black pigments.
  • the perforated support is advantageously a plaster support. It may also, nevertheless, be present in the form of a wooden board, a metal board or a PVC board.
  • the nonwoven material designates materials comprising artificial and/or synthetic and/or natural fibers.
  • the expression 'artificial and/or synthetic fibers' designates fibers chosen from a group comprising, among artificial fibers, viscose fibers, and among synthetic fibers, polyester, polypropylene, polyamide, polyacrylic, polyvinyl alcohol, and polyethylene fibers, alone or in mixture.
  • the expression 'natural fibers' designates especially cellulose fibers.
  • Figures 1 a is a schematical partial cross section of an acoustic tile in accordance with a preferred embodiment of the present invention.
  • the acoustic tile 10 of Fig. 1 a comprises a tile support 12 with holes 14, and a nonwoven material 16 covering one face of the tile support 12, and being fastened thereon.
  • the surface of the nonwoven material 16 facing the tile support 12 is coated by a photocatalytic composition 18.
  • the acoustic tile is, in accordance with a preferred embodiment of the invention, manufactured such that the tile support 12 is produced, for example from plaster, and holes 14 being arranged in the tile support.
  • the nonwoven material 16 is manufactured separately, and a photocatalytic composition 18 is applied on one face of the nonwoven material 16.
  • the final manufacture of the actual acoustic tile 10 takes place, for instance, such that an appropriate binder is applied on one face of the tile support 12, and the nonwoven material 16 is laid and pressed on the tile support such that the photocatalytic composition layer 18 is positioned against the tile support 12.
  • the acoustic tile of Fig. 1a functions such that the holes 14 of the tile 10 are blinded by the photocatalytic composition layer 18, whereby the pollutants in the air are able to reach the photocatalytic composition at the bottoms of the holes and be photocatalytically degraded such that carbon from the carbon chains is converted into carbon dioxide.
  • Fig. 1 b is a schematical partial cross section of an acoustic tile in accordance with another preferred embodiment of the present invention.
  • the only exception compared to the acoustic tile of Fig. 1 a can be seen in the structure of the nonwoven material 16.
  • both surfaces of the nonwoven material 16 are coated with photocatalytic composition 18 and 20.
  • the manufacture of the acoustic tile is similar to the one discussed above.
  • the function of the acoustic tile 10 is substantially the same, but now it is possible to utilize the photocatalytic composition 20 arranged on the upper face (provided that it is a question of an acoustic tile used as a ceiling material) of the acoustic tile provided that polluted air is allowed to enter the space above the acoustic tile 10.
  • One option is to arrange the nonwoven material 16 of the acoustic tile 10 porous such that air is able to pass through the hole 14 and the nonwoven material 16 to the upper side of the acoustic tile 10.
  • Another option would be to arrange specific openings in the acoustic tile 10 via which polluted air could enter the cavity above the acoustic tile, or to arrange corresponding openings to the sides of the ceiling.
  • an appropriate light source should be provided in the cavity facing the photocatalytic composition layer 20 on the upper surface of the acoustic tile.
  • the pollution removal efficiency of a tile of the invention in UV or visible light, is compared to that of an acoustic tile sold by the KNAUF company under the CLEANEO brand and to standard tiles.
  • Figure 2 represents a photocatalysis loop in which the tests are performed.
  • the photocatalysis loop is comprised of a tunnel 1 with a volume equal to 0.1 m 3 in which the pulsed air circulates, coming from the inlet 2 by means of a ventilator 3 with a flow of 150 m 3 /h.
  • the tunnel contains three 24W UV lamps 4 or a lamp emitting in the visible range positioned near the acoustic tile to be tested 5.
  • Injection of a polluting agent, in practice toluene is done at the inlet 6 while the formed carbon dioxide coming out at end 7 is detected by infrared light by a means 8, the information then being analyzed by a computer 9.
  • the tile of the invention is the tile that degrades toluene most effectively and that generates the most CO 2 by photocatalysis, and that, thanks to the combined action of zeolite, attaches the pollutant near the TiO 2 , which acts by photocatalysis.
  • the CLEANEO product also attaches the pollutant thanks to the presence of zeolite.
  • the very low generation of CO 2 is probably due to the fact that the plaster boards are not constituted of pure calcium carbonates and that the board produces a carbonation phenomenon with UV contact. This cannot be a photocatalysis phenomenon under any circumstances.
  • the LAFARGE standard boards/tiles with and without nonwoven material and lacking the photocatalyst agent and zeolite have an insignificant pollution removal activity.
  • Figure 4 shows that in the absence of UV light, the efficiency of the tile of the invention is greater than that of the CLEANEO tile. In other words, even in the absence of light, the pollution removal phenomenon subsists.
  • UV radiation was replaced by visible light whose spectrum was between 400 and 700 nm.
  • the tile of the invention presents very good pollution removal efficiency still with the same principle, a combination of the adsorbent effect of zeolite with the photocatalyst effect of TiO 2 .
  • the tile of the invention may be used in offices in daylight or artificial light, these two sources comprising both UV (in low proportion) and visible (in high proportion) radiation.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Catalysts (AREA)

Claims (11)

  1. Dalle acoustique (10) dotées d'un support perforé (12), dans laquelle l'une des faces est couverte sur toute sa surface d'un voile non tissé (16), dans laquelle le voile non tissé (16) est couverte sur au moins une face par une composition photocatalytique (18) comprenant au moins un agent photocatalyseur, caractérisée en ce que la composition photocatalytique (18) est appliquée sur la face du voile non tissé (16) faisant face au support (12).
  2. Dalle (10) selon la revendication 1, caractérisée en ce que la composition photocatalytique (18) est appliquée sur une face à un taux de 2 à 50 g/m2, de préférence de l'ordre de 4 à 12 g/m2.
  3. Dalle (10) selon la revendication 1, caractérisée en ce que la composition photocatalytique (18) est appliquée sur deux faces du voile (16).
  4. Dalle (10) selon la revendication 3, caractérisée en ce que la composition photocatalytique (18) est imprégnée sur le voile (16) à un taux de 2 à 100 g/m2, de préférence de l'ordre de 8 à 20 g/m2.
  5. Dalle (10) selon l'une des revendications précédentes, caractérisée en ce que l'agent photocatalyseur (18) est du TiO2 ayant une surface spécifique supérieure à 225 m2/g et une taille de particule de l'ordre de 15 nm.
  6. Dalle (10) selon l'une des précédentes revendications, caractérisée en ce que la composition photocatalytique (18) contient en outre des particules adsorbantes.
  7. Dalle (10) selon la revendication 6, caractérisée en ce que les particules adsorbantes représentent entre 1 et 50 % en poids de la composition photocatalytique, (18) de préférence entre 5 et 25 %.
  8. Dalle (10) selon l'une des précédentes revendications, caractérisée en ce que la composition photocatalytique (18) contient, comme agent de liaison, une dispersion colloïdale aqueuse de SiO2 contenant entre 20 et 50 % en poids de SiO2 avec une taille de l'ordre de 10 à 50 nm, de préférence l'ordre de 20 à 30 nm.
  9. Dalle (10) selon la revendication 1, caractérisée en ce que la composition photocatalytique (18) contient de 10 à 60 parts (en sec), de préférence 50 parts sèches d'une dispersion colloïdale aqueuse de SiO2 contenant entre 20 et 50 % en poids de SiO2 avec une taille de l'ordre de 10 et 50 nm, de préférence de l'ordre de 20 et 30 nm, le complément à 100 % étant constitué de TiO2 et éventuellement par des particules adsorbantes.
  10. Dalle (10) selon la revendication 9, caractérisée en ce que le complément à 100 % est constitué de 25 à 45 parts de TiO2 et 5 à 25 parts des particules adsorbantes, telles que, en particulier, la zéolithe.
  11. Dalle (10) selon la revendication précédente, caractérisée en ce que le support (12) est en plâtre, bois, métal ou PVC.
EP09800105.0A 2008-07-22 2009-07-17 Plaque acoustique Not-in-force EP2318606B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0854997A FR2934283B1 (fr) 2008-07-22 2008-07-22 Dalle acoustique perforee depolluante
PCT/FI2009/050632 WO2010010231A1 (fr) 2008-07-22 2009-07-17 Carreau acoustique

Publications (2)

Publication Number Publication Date
EP2318606A1 EP2318606A1 (fr) 2011-05-11
EP2318606B1 true EP2318606B1 (fr) 2013-06-26

Family

ID=40263324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09800105.0A Not-in-force EP2318606B1 (fr) 2008-07-22 2009-07-17 Plaque acoustique

Country Status (4)

Country Link
US (1) US20110300332A1 (fr)
EP (1) EP2318606B1 (fr)
FR (1) FR2934283B1 (fr)
WO (1) WO2010010231A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014018799A1 (de) * 2014-12-19 2016-06-23 Bayerisches Zentrum für Angewandte Energieforschung e.V. Feuchtespeicherndes Stoffgemisch und Bauplatte daraus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ307426B6 (cs) * 2010-06-11 2018-08-15 Eoxolit Sprl Způsob vytváření kompozitní soustavy s fotokatalytickou funkcí
FR3004130B1 (fr) 2013-04-08 2015-12-11 Ecole Norm Superieure Lyon Procede de depot d'un revetement photocatalytique, revetements, materiaux textiles et utilisation en photocatalyse associes
CN105220856A (zh) * 2015-10-21 2016-01-06 桂林风范装饰工程有限公司 一种光触媒天花板

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8705270U1 (de) * 1987-04-09 1987-07-02 Stotmeister GmbH, 7894 Stühlingen Schallabsorbierende Vorsatzschale für Decken und Wände
US5674594A (en) * 1994-08-24 1997-10-07 Armstrong World Industries, Inc. Plain surface acoustical product
FR2775696B1 (fr) * 1998-03-05 2000-04-14 Saint Gobain Vitrage Substrat a revetement photocatalytique
FR2776944B1 (fr) * 1998-04-03 2000-05-12 Ahlstrom Paper Group Research Composition photocatalytique
DE20102074U1 (de) * 2001-02-07 2001-08-09 Nohlen Wolfgang Akustikplatte Scherff Rondo/Quadro
ES2355557T3 (es) * 2004-09-29 2011-03-28 Eurovia Composiciones de revestimiento para paramentos antirruido descontaminantes.
DE202007004823U1 (de) * 2007-04-02 2007-08-02 Geipel, Udo Lochplattenanordnung zur Luftreinhaltung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014018799A1 (de) * 2014-12-19 2016-06-23 Bayerisches Zentrum für Angewandte Energieforschung e.V. Feuchtespeicherndes Stoffgemisch und Bauplatte daraus

Also Published As

Publication number Publication date
FR2934283A1 (fr) 2010-01-29
WO2010010231A1 (fr) 2010-01-28
FR2934283B1 (fr) 2010-09-24
US20110300332A1 (en) 2011-12-08
EP2318606A1 (fr) 2011-05-11

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