Interior wall lining for acoustic insulation

Abstract

The invention relates to an acoustic lining (1) intended to be placed against an interior surface (3) of at least one wall (4) of a room (5), characterised in that it comprises at least two acoustic panels (2) in lateral contact with one another and in that each panel (2) comprises: -an outer layer (6) which is visible from inside the room (5) and which is made up of a high-density layer of between 450 kg / m3 and 950 kg / m3, -an inner layer (8) which is intended to be in contact with the interior surface (3) of the wall (4) and which is made up of a high-density layer of between 450 kg / m3 and 950 kg / m3, -an intermediate layer (7) which is inserted between the outer layer (6) and the inner layer (8), and which is made up of a sound-absorbing material.

Description

Description Title of the invention: INTERIOR WALL COVERING FOR ACOUSTIC INSULATION

[0001] The present invention relates to an interior covering for acoustic insulation.

[0002] Such a covering is used to cover a wall of a room, which could for example be a ceiling, a wall or a floor. The term "room" refers to any enclosed space in which people can move around, and can therefore refer to, for example, an apartment, a house, an industrial facility, a public establishment. This covering aims to reduce noise pollution in these rooms in order to improve the comfort of the occupants of said rooms.

[0003] This type of coating must meet at least four requirements: -it must be able to be mounted easily and quickly on the target wall, -it must be truly effective in reducing noise, -it must be thinner than current solutions, -it must have a robust hold on this wall, without risk of positioning drift or degradation over time.

[0004] A coating according to the invention meets the above-mentioned requirements.

[0005] The invention relates to a soundproofing coating, intended to be applied against an interior surface of at least one wall of a room.

[0006] According to the invention, the covering comprises at least two soundproofing panels in lateral contact with each other, and each panel comprises: - an external layer which is intended to be visible from inside the room and which is made up of a high density layer, between 450kg / m 3 and 950 kg / m 3 , - an internal layer which is intended to be in contact with the interior surface of the wall and which is made up of a high density layer, between 450kg / m 3 and 950 kg / m 3 , -an intermediate layer which is inserted between the outer layer and the inner layer and which is made of a sound-absorbing material. The sound-absorbing coating according to the invention is made up of several individual panels, each comprising two high-density layers framing a layer of a soundproofing material. These panels are intended to be affixed to the interior surface of the room wall. The term "affixed" implies contact between the panel and the interior surface of the wall, with an extended interface plane, and also fixing said panel to said interior surface. Indeed, each panel can be fixed to said interior surface by any means, in particular by gluing. As the high-density inner layer of a panel is required to be in contact with the interior surface of the room wall, it must have a certain strength to ensure good mechanical strength of the panel against said interior surface. This outer layer represents the part of the panel that will be visible from inside the room, and is therefore likely to be covered with paint, wallpaper or any other finishing coating.The room can for example represent an apartment, a house, an industrial facility, a public establishment, etc. The wall can for example be a vertical wall, a ceiling, an inclined face, a floor, etc. To avoid any ambiguity, the soundproofing coating is intended to be found inside the room. The soundproofing coating creates an extra thickness that will allow people present in the room to be isolated from outside noise. The soundproofing material located between the two high-density layers can for example be made of mineral wool, glass or rock wool, cork, bio-sourced wool, etc. When it comes to mineral wool, it can be new or recycled. The soundproofing panels can be joined together by any means, to form a single-layer and continuous soundproofing coating.

[0007] According to a possible feature of the invention, the intermediate layer comprises a glass or rock mineral wool. This mineral wool can be new or recycled. The intermediate layer is preferably fibrous. In other words, it is not packed to its maximum to maintain an airy appearance and thus differentiate itself from a solid and hard layer which would tend to transmit sound waves rather than dampen them.

[0008] According to a possible characteristic of the invention, the density of the intermediate layer is less than 250kg / m3. This low density demonstrates the airy side of the intermediate layer, so as to play its role as a sound absorber with maximum efficiency.

[0009] According to a possible characteristic of the invention, the thickness of each panel is between 15mm and 50mm. These panels are not very thick and can therefore be affixed to any type of internal surface, including those which are difficult to access, i.e. those which do not have a large clearance space.

[0010] According to a possible characteristic of the invention, the thickness of each panel is between 25mm and 30mm. This is an optimal thickness, which is in no way limiting within the scope of the present invention.

[0011] According to a possible characteristic of the invention, each panel comprises at least one clip and one complementary clip, so that two successive panels are fixed to each other by an interaction between a clip of one of the panels and a complementary clip of the other panel. This type of interaction between panels will ensure high cohesion of the soundproofing coating. Indeed, these “clip / complementary clip” type interactions will ensure homogeneous and solid connections between the panels, preventing the position of these panels from drifting over time, and therefore ensuring good positional stability of the soundproofing coating. Thanks to this type of interaction, the soundproofing coating will give an impression of geometric continuity.

[0012] According to a possible characteristic of the invention, the clip and the complementary clip are made in the external layer of each panel. This external layer being the only one of the three layers of the panels not to have a particular function, it is logical that the means of attaching said panels to each other are transferred to it.

[0013] According to a possible characteristic of the invention, the clip is constituted by a projection of the external layer which projects from the panel, and the complementary clip is constituted by an end zone of the external layer which does not project from the panel, the clip and the complementary clip having complementary shapes which fit into each other. These clipping means are particularly suitable for fixing the soundproofing panels of a soundproofing covering according to the invention, but are in no way limiting within the scope of the present invention. Other types of clips and complementary clips may be envisaged.

[0014] The panels can also be mechanically held together by gluing, nailing or facing a male and female shape on the side portion.

[0015] Another subject of the invention is a room comprising at least one wall provided with an interior surface.

[0016] According to the invention, said inner surface is lined with several soundproofing panels of a soundproofing coating according to the invention, the inner layers of said panels being in contact with the inner surface of the wall, said panels being secured to said inner surface by gluing by means of a layer of adhesive inserted between said inner surface and the inner layers of said panels, two successive panels being fixed to each other by clipping. The adhesive layer can be directly integrated into the panel by being constitutive of the inner layer and protected before its use by a thin peelable layer. The soundproofing coating of a room according to the invention is robust and homogeneous, due to a double level of fixing: - fixing of the soundproofing panels to the inner surface of the wall by gluing, - fixing the soundproofing panels together by clipping.

[0017] In this way, such a soundproofing coating does not risk changing over time due to gradual movement of the panels.

[0018] Another subject of the invention is a method of depositing a soundproofing coating according to the invention, on an interior surface of a wall of a room, said coating comprising several soundproofing panels.

[0019] According to the invention, the method comprises the following steps: -a step of coating an external surface of the internal layer of a first soundproofing panel with an adhesive, said first panel comprising a clip, - a step of gluing said first panel to the interior surface of the wall of the room, - a step of coating an external surface of the internal layer of a second soundproofing panel with the adhesive, said second panel comprising a complementary clip, - a step of clipping the second panel to the first panel, by means of an interaction between the clip and the complementary clip, - a step of gluing said second panel onto the inner surface of the wall of the room, - a step of repeating the previous steps depending on the number of soundproofing panels to be fixed to the interior surface of the room wall.

[0020] A soundproofing coating according to the invention has the advantage of being able to be implemented progressively by means of several soundproofing panels, allowing precise and well-controlled assembly of this soundproofing coating. It also has the advantage of being homogeneous and of having good positional stability, thanks to a first fixing of the soundproofing panels on the internal surface of a wall of a room, and thanks to a second fixing of said panels between them. Finally, it has the advantage of having a particularly reduced thickness compared to that of existing acoustic lining systems, making it possible to limit the loss of available volume in the room in which it is intended to be installed and allowing easier handling of the panels which compose it.

[0021] A detailed description of a preferred embodiment of a coating according to the invention is given below, with reference to the following figures:

[0022] [Fig. 1] Figure 1 is a schematic sectional view of a soundproofing coating according to the invention,

[0023] [Fig. 2] Figure 2 is a sectional view of the junction between two soundproofing panels of a soundproofing covering according to the invention,

[0024] [Fig. 3] Figure 3 is a sectional view of an area of ​​a soundproofing panel of a soundproofing covering according to the invention, showing the evolution of a sound wave through said panel,

[0025] [Fig. 4] Figure 4 is a perspective view of an area of ​​a soundproofing panel of a soundproofing covering according to the invention and carrying a clip,

[0026] [Fig. 5] Figure 5 is a perspective view of an area of ​​a soundproofing panel of a soundproofing covering according to the invention and carrying a complementary clip,

[0027] [Fig. 6] Figure 6 is a perspective view of two successive panels of a soundproofing covering according to the invention, one of the two panels carrying a clip and the other panel carrying a complementary clip, the two panels being oriented in space so as to show their interaction,

[0028] [Fig. 7] Figure 7 is a perspective view of a soundproofing covering according to the invention, for which each panel extends over the entire height of the walls to be covered,

[0029] Referring to Figure 1, a soundproofing covering 1 according to the invention comprises several separate soundproofing panels 2, and intended to be placed against an interior surface 3 of a wall 4 of a room 5 which may for example be an apartment, a house, an industrial installation or a public establishment. More generally, such a room 5 represents any closed place in which people are likely to move around. The wall 4 on which a soundproofing covering 1 according to the invention can be affixed, can indifferently be represented by a vertical wall, a horizontal or inclined ceiling, a floor, etc. As an example, let us assume that the initial panels A are all identical and have the same length.Some of these panels A may be placed as is on the interior surface 3 of the wall 4 of the room, and some other panels B will have to be cut into two parts to complete a vertical strip of soundproofing covering so that it extends over the entire height of said interior surface 3. The other part of the cut panel B may then start another vertical strip of soundproofing covering 1.

[0030] Referring to Figures 2 and 3, all the panels 2 of the same soundproofing covering 1 consist of a stack of three layers, namely: - an external layer 6 which is visible from inside room 5 and which is composed of a high density layer, between 450kg / m 3 and 950kg / m 3 . It can be solid wood, chipboard, compacted wood, composite wood or even plasterboard. This outer layer 6, since it is visible from the inside of the room 5, is likely to be covered with paint, coating, wallpaper or any other decorative coating to improve the aesthetics of the soundproofing coating 1, -an inner layer 8 which is intended to be in contact with the inner surface 3 of the wall 4 of the room 5, and which is composed of a high density layer, between 450 and 950 kg / m3. The choice of a high density material for this inner layer allows this layer to be of low thickness and to ensure that the soundproofing panels 2 have good mechanical strength against the inner surface 3 of the wall 4 of the room 5. Preferably the thickness of the inner layer 8 is less than or equal to that of the outer layer 6. -an intermediate layer 7 which is inserted between the outer layer 6 and the inner layer 8 and which is made of a sound-absorbing material. Such a material can advantageously be materialized by mineral, glass or rock wool. This intermediate layer 7 constitutes the heart of the panel 2, since it is essentially through it that said panel 2 will ensure the spring function of the acoustic complex. The mineral fiber is not packed to its maximum so as not to constitute a solid layer, which would be likely to transmit the sound waves and not to dampen them. The mineral wool therefore appears in fibrous form giving the intermediate layer a rather airy appearance, the density of which is typically less than or equal to 250 kg / m 3 .

[0031] The thickness of a soundproofing panel 2 of a soundproofing covering 1 according to the invention is between 15mm and 50mm, and preferably between 25 and 30mm.

[0032] Referring to Figure 3, a panel 2 of a soundproofing coating according to the invention uses the principle of “mass-spring-mass” acoustic insulation. A sound wave 9 arrives against the high-density outer layer 6 of a panel 2. A majority fraction 10 of this sound wave passes through this outer layer 6, while a minority fraction 11 is reflected out of said panel 2. Arriving in the intermediate layer 7, the majority fraction 10 of the sound wave 9 which has passed through the outer layer 6 diffracts in all directions, subdividing into several components 12, 13, 14, 15 of low intensity each. This diffraction greatly dampens the initial sound wave. One 15 of these components manages to pass through the inner layer 8 with a very low intensity. Between the incident sound wave 9 having a certain intensity, and the low intensity component 25 of said sound wave 9 managing to exit the internal layer 8 of the panel 2.A soundproofing coating according to the invention thus manages to reduce airborne noise by 2 to 10 dB when installed as a lining on a wall and by 20 to 35 dB when partitioned. The values ​​vary depending on the total thickness of the panel and the nature of its constituents.

[0033] Each of the panels 2 of a soundproofing covering 1 according to the invention has two fixing means: -a first means of attachment to the inner surface 3 of the wall 4 of the room 5. Preferably, this first means of attachment is achieved by gluing. A layer of an adhesive is deposited on an outer surface of the inner layer 8 of the panel 2, then the panel 2 is glued to the inner surface 3 of the wall 4 of the room 5 by means of this layer of adhesive. In this way, the inner layer 8 of the panel 2 is in contact with the inner surface 3 of the wall 4 of the room 5, and the outer layer 6 of said panel 2 constitutes the layer furthest from said inner surface 3. The adhesive can for example be an adhesive mortar or mastic glue. - a second means of attachment to an adjacent soundproofing panel 2. Referring to Figures 4, 5 and 6, the attachment of a first panel 2 to an adjacent second panel 2 is carried out by clipping. The first panel 2 comprises a clip 16 and the second panel 2 comprises a complementary clip 17 intended to cooperate with the clip 16 of the first panel 2, to ensure attachment between the two panels 2.

[0034] Referring to Figure 4, the clip 16 of a first panel 2 is constituted by an extension 18 of the outer layer 6 which projects from the panel 2. This extension 18 is flat and is of lesser thickness than that of said outer layer 6. It extends an outermost zone of said outer layer 6. This extension 18 extends over the entire width of the outer layer 6 and comprises a rounded groove 19 extending over the entire width of said extension 18.

[0035] Referring to Figure 5, the complementary clip 17 of a second adjacent panel 2 is constituted by an end zone 20 of the outer layer 6, which does not protrude from the panel 2. This end zone 20 is flat and is of lesser thickness than that of said outer layer 6. It extends an innermost zone of said outer layer 6. This end zone 20 extends over the entire width of the outer layer 6 and comprises a rounded rib 21 extending over the entire width of said end zone 20.

[0036] Referring to Figure 6, the clipping between the first panel and the second panel 2 is achieved by means of inserting the rounded rib 21 of the complementary clip 17 of one of the two panels 2, into the rounded groove 19 of the clip 16 of the other panel 2, the intermediate layers 8 and the internal layers 7 of the two panels 2 coming into contact with each other. during this insertion. The two adjacent panels 2 will thus give the impression of perfect continuity between them.

[0037] When implementing a soundproofing covering according to the invention, certain soundproofing panels 2 may have been cut beforehand, to enable the surface of the soundproofing covering 1 to be adapted to the dimensions of the interior surface 3 of the wall 4 of the room 5 to be covered.

[0038] In the context of the present invention, two different types of panels 2 should be distinguished: -elongated panels 2 covering by themselves the entire height (or length) of a wall on which they are intended to be affixed, as illustrated in Figure 7. These panels 2 are rectangular in shape and the two large parallel sides of these panels 2 have approximately the same height as that of said wall. For this particular configuration, these panels 2 have only one clip 16 extending along one of the two large sides and a single complementary clip 17 extending along the other large side, - panels 2 of smaller dimension as illustrated in figure 1, and which are each brought to interact by clipping on four sides with other panels 2 of smaller dimension and located around. These panels 2 have two first parallel sides, one of which comprises a clip 16 and the other comprises a complementary clip 17, and two second parallel sides, one of which comprises a clip 16 and the other comprises a complementary clip 17.

[0039] A method of depositing a soundproofing coating according to the invention, on an interior surface 3 of a wall 4 of a room 5, comprises the following steps: - a step of coating an external surface of the internal layer 8 of a first soundproofing panel 2 with an adhesive, said first panel 2 comprising at least one clip 16 and at least one complementary clip 17, - a step of gluing said first panel 2 onto the interior surface 3 of the wall 4 of the room 5, - a step of coating an external surface of the internal layer 8 of a second soundproofing panel 2 with the adhesive, said second panel 2 comprising at least one clip 16 and a complementary clip 17, - a step of clipping the second panel 2 to the first panel 2 by making the clip 16 and the complementary clip 17 of each of said panels 2 cooperate, - a step of gluing said second panel 2 onto the interior surface 3 of the wall 4 of the room 5.

[0040] The previous steps will be repeated as many times as there are 2 soundproofing panels to be fixed.

[0041] It should be noted that the clip 16 and the complementary clip 17 detailed in the detailed description above are purely illustrative and are in no way limiting within the scope of the present invention. The clip 16 and the complementary clip 17 are configured to provide a male / female type interaction between them. The clip 16 and the complementary clip 17 can either extend over the entire length or width of the panel 2 to provide an extended interaction in space, or be more punctual so as to provide a limited interaction in space.

Claims

Demands

1. Soundproofing covering (1), intended to be affixed to an interior surface (3) of at least one wall (4) of a room (5), characterized in that it comprises at least two soundproofing panels (2) in lateral contact with each other, and in that each panel (2) comprises: -an outer layer (6) which is intended to be visible from inside the room (5) and which consists of a high-density layer, between 450 kg / m 3 and 950 kg / m 3 -an inner layer (8) which is intended to be in contact with the inner surface (3) of the wall (4) and which consists of a high-density layer, between 450 kg / m 3 and 950 kg / m 3 , -an intermediate layer (7) which is inserted between the outer layer (6) and the inner layer (8) and which is made of a sound-absorbing material.

2. Sound-absorbing coating according to claim 1, characterized in that the intermediate layer (7) comprises a glass or rock mineral wool,

3. Sound-absorbing coating according to claim 2, characterized in that the density of the intermediate layer (7) is less than 250 kg / m³ 3 .

4. Soundproofing coating according to any one of claims 1 to 3, characterized in that the thickness of each panel (2) is between 15mm and 50mm.

5. Soundproofing coating according to claim 4, characterized in that the thickness of each panel (2) is between 25mm and 30mm.

6. Soundproofing coating according to any one of claims 1 to 5, characterized in that each panel (2) comprises at least one clip (16) and one complementary clip (17), such that two successive panels (2) are fixed to each other by an interaction between a clip (16) of one of the panels (2) and a complementary clip (17) of the other panel (2).

7. Soundproofing coating according to claim 6, characterized in that the clip (16) and the complementary clip (17) are made in the outer layer (6) of each panel (2).

8. Soundproofing coating according to claim 7, characterized in that the clip (16) is constituted by an advance (18) of the outer layer (6) which protrudes from the panel (2), and in that the complementary clip (17) is constituted by an end zone (20) said outer layer (6) not protruding from the panel (2), the clip (16) and the complementary clip (17) having complementary shapes which fit into each other.

9. A room (5) comprising at least one wall (4) having an interior surface (3), characterized in that said interior surface (3) is lined with several soundproofing panels (2) of a soundproofing coating (1) according to any one of claims 6 to 8, characterized in that the inner layers (8) of said panels (2) are in contact with the interior surface (3) of the wall (4), and in that said panels (2) are attached to said interior surface (3) by bonding by means of a layer of adhesive inserted between said interior surface (3) and the inner layers (8) of said panels (2), two successive panels (2) being fixed to each other by clipping.

10. A method for depositing a sound-absorbing coating (1) according to any one of claims 1 to 8 on an interior surface (3) of a wall (4) of a room (5), said coating (1) comprising several sound-absorbing panels (2), characterized in that it comprises the following steps: -a step of coating an external surface of the inner layer (8) of a first sound-absorbing panel (2) with an adhesive, said first panel comprising a clip (16) -a step of gluing said first panel (2) onto the inner surface (3) of the wall (4) of the room (5), -a step of coating an external surface of the internal layer (8) of a second soundproofing panel (2) with the adhesive, said second panel (2) comprising an additional clip (17), -a step of clipping the second panel (2) to the first panel (2), by means of an interaction between the clip (16) and the complementary clip (17) -a step of gluing said second panel (2) onto the inner surface (3) of the wall (4) of the room (5), -a step of repeating the previous steps depending on the number of soundproofing panels (2) to be fixed to the inner surface (3) of the wall (4) of the room (5).

Images