GB2292786A - Acoustic sheet material - Google Patents
Acoustic sheet material Download PDFInfo
- Publication number
- GB2292786A GB2292786A GB9417327A GB9417327A GB2292786A GB 2292786 A GB2292786 A GB 2292786A GB 9417327 A GB9417327 A GB 9417327A GB 9417327 A GB9417327 A GB 9417327A GB 2292786 A GB2292786 A GB 2292786A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acoustic
- sheet material
- acoustic sheet
- layer
- polymeric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 33
- 239000006260 foam Substances 0.000 claims abstract description 14
- 230000004888 barrier function Effects 0.000 claims abstract description 10
- 239000011888 foil Substances 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 239000005030 aluminium foil Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
- Laminated Bodies (AREA)
Abstract
An acoustic sheet material comprising an absorption foam layer (10) profiled in two dimensions with corrugations (12) on its inside face, a layer of polymeric acoustic barrier material (14) adhesively bonded to the flat outer face of the foam layer, and a metallic foil facing (16) adhesively bonded to the in the manner of an egg-box cover. The foam layer (10) is corrugated in the manner of an egg-box cover. The metallic foil (16) may be glass-reinforced aluminum foil. <IMAGE>
Description
Acoustic Sheet Material
This invention relates to a sheet material providing an acoustic barrier and suitable, for example, for wrapping around noisy ductwork or other items giving rise to the generation of unwanted noise.
Sheet material of this kind, incorporating a layer of acoustically absorbent material such as plastics foam or non-woven glass or mineral fibres, are already known.
One of the problems encountered with the known acoustic sheet materials is difficulty in bending or otherwise shaping the material around the item to be covered. The acoustic layer has a tendency to crack or tear when bent, especially if folded around a sharp corner for example.
In order to prevent this, it has been usual to bond a fabric or cloth scrim to the acoustic layer, at least on the face which will be innermost in use. Typically the outer face of the acoustic layer also has a scrim bonded thereto, over which is bonded a metallic foil facing.
It has been suggested that this known composite sheet material should be bonded by use of heat and pressure.
According to the invention, there is provided an acoustic sheet material comprising a layer of absorption foam profiled on one face with corrugations in two directions, in the manner of an egg-box cover, a polymeric acoustic barrier material bonded to the other flat face of the acoustic foam layer and a metallic foil bonded to the polymeric acoustic barrier material.
The three layers are preferab'y adhesively bonded.
The sheet material in accordance with the invention is intended to be used with the profiled face on the inside, with the advantage that the material can be readily bent and folded around an item to be covered without risk of cracking or tearing of the absorbent foamed material, even though the scrim is omitted.
The acoustic sheet material in accordance with the invention is further described with reference to the accompanying drawing, the single figure of which shows a portion of the material in perspective.
Referring to the drawing, the illustrated acoustic sheet material comprises an inner layer of absorption foam 10 profiled with corrugations 12 in two directions of its inside face, in the manner of an egg box cover. One suitable foam for this inner layer is that sold under the Trade Mark "Melatech".
The thickness of the foam layer, including the corrugations, may range from about 20 mm up to nearly 50 mm, depending on the intended application.
Adhesively bonded to the flat outer face cf the foam layer is a layer of polymeric acoustic barrier material 14, which typically may have a density of 5 or 10 kg/m2.
Adhesively bonded to the acoustic barrier material 14 is a glass-reinforced aluminium foil facing 16.
The illustrated acoustic sheet material can readily be bent and folded, corrugated face inwards, around noisy ducting or other items to be covered, without risk of the foam layer cracking or tearing. Moreover, the composite material is simple to manufacture, bonding by use of heat and pressure being unnecessary.
Claims (7)
1. An acoustic sheet material comprising a layer of absorption foam profiled on one face with corrugations in two directions, in the manner of an egg-box cover, a polymeric acoustic barrier material bonded to the other flat face of the acoustic foam layer and a metallic foil bonded to the polymeric acoustic barrier material.
2. An acoustic sheet material according to claim 1, wherein the three layers are adhesively bonded.
3. An acoustic sheet material according to claim 1 or claim 2, wherein the thickness of the foam layer, including corrugations, lies between 20 mm and 50 mm.
4. An acoustic sheet material according to any of claims 1 to 3, wherein the polymeric acoustic barrier material has a density in the range 5 to 10 kg/m2.
5. An acoustic sheet material according to any of claims 1 to 4, wherein the metallic foil is glass- reinfcrced aluminium foil.
6. An acoustic barrier provided by the acoustic sheet material of any of claims 1 to 5, said acoustic sheet material being wrapped around an item generating unwanted noise with its profile face on the inside.
7. An acoustic sheet material substantially as hereinbefore described with reference to the accoimpanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9417327A GB2292786B (en) | 1994-08-27 | 1994-08-27 | Acoustic sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9417327A GB2292786B (en) | 1994-08-27 | 1994-08-27 | Acoustic sheet material |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9417327D0 GB9417327D0 (en) | 1994-10-19 |
| GB2292786A true GB2292786A (en) | 1996-03-06 |
| GB2292786B GB2292786B (en) | 1997-10-22 |
Family
ID=10760491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9417327A Expired - Fee Related GB2292786B (en) | 1994-08-27 | 1994-08-27 | Acoustic sheet material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2292786B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095267A2 (en) * | 2002-05-08 | 2003-11-20 | Johnson Controls Technology Company | Sound absorbing panel for a vehicle and its method of manufacture |
| WO2014206168A1 (en) * | 2013-06-25 | 2014-12-31 | The Hong Kong University Of Science And Technology | Acoustic and vibrational energy absorption metamaterials |
| US20150343965A1 (en) * | 2014-06-02 | 2015-12-03 | Ford Global Technologies, Llc | Truck cab liner with noise absorber |
| US9362799B2 (en) * | 2014-04-14 | 2016-06-07 | Cummins Power Generation Ip, Inc. | Acoustic covering for a generator set enclosure with pressure sensitive adhesive |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867271A (en) * | 1987-01-07 | 1989-09-19 | Irbit Research & Consulting Ag | Acoustic insulation board consisting of foam |
-
1994
- 1994-08-27 GB GB9417327A patent/GB2292786B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867271A (en) * | 1987-01-07 | 1989-09-19 | Irbit Research & Consulting Ag | Acoustic insulation board consisting of foam |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003095267A2 (en) * | 2002-05-08 | 2003-11-20 | Johnson Controls Technology Company | Sound absorbing panel for a vehicle and its method of manufacture |
| WO2003095267A3 (en) * | 2002-05-08 | 2004-01-15 | Johnson Controls Tech Co | Sound absorbing panel for a vehicle and its method of manufacture |
| WO2014206168A1 (en) * | 2013-06-25 | 2014-12-31 | The Hong Kong University Of Science And Technology | Acoustic and vibrational energy absorption metamaterials |
| US9520121B2 (en) | 2013-06-25 | 2016-12-13 | The Hong Kong University Of Science And Technology | Acoustic and vibrational energy absorption metamaterials |
| US9362799B2 (en) * | 2014-04-14 | 2016-06-07 | Cummins Power Generation Ip, Inc. | Acoustic covering for a generator set enclosure with pressure sensitive adhesive |
| US20150343965A1 (en) * | 2014-06-02 | 2015-12-03 | Ford Global Technologies, Llc | Truck cab liner with noise absorber |
| RU2689666C2 (en) * | 2014-06-02 | 2019-05-28 | ФОРД ГЛОУБАЛ ТЕКНОЛОДЖИЗ, ЭлЭлСи | Vehicle body with passenger cabin and exhaust fan system for vehicle cabin |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2292786B (en) | 1997-10-22 |
| GB9417327D0 (en) | 1994-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990827 |