GB1481163A - Sound absorbing material - Google Patents

Sound absorbing material

Info

Publication number
GB1481163A
GB1481163A GB29768/73A GB2976873A GB1481163A GB 1481163 A GB1481163 A GB 1481163A GB 29768/73 A GB29768/73 A GB 29768/73A GB 2976873 A GB2976873 A GB 2976873A GB 1481163 A GB1481163 A GB 1481163A
Authority
GB
United Kingdom
Prior art keywords
layer
foamed
approximately
sound absorbing
absorbing material
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.)
Expired
Application number
GB29768/73A
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.)
Fastbac Research Ltd
Original Assignee
Fastbac Research Ltd
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 Fastbac Research Ltd filed Critical Fastbac Research Ltd
Priority to GB29768/73A priority Critical patent/GB1481163A/en
Publication of GB1481163A publication Critical patent/GB1481163A/en
Expired legal-status Critical Current

Links

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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • 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 form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/14—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side
    • 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 form; Layered products 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 form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0336—Noise absorbers by means of sound-absorbing materials
    • 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
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0264—Polyester
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption

Abstract

1481163 Coated products FASTBAC RESEARCH Ltd 26 June 1974 [22 June 1973] 29768/73 Heading B2E [Also in Division B5] A sound absorbing material comprises a first layer of foamed flexible plastics material, e.g. of polyether or polyester material, and a second layer secured thereto without the use of a separately applied adhesive, the second layer being of non-foamed elastomeric material and being applied to the first layer in a manner such that predetermined areas of the face of the first layer are exposed through apertures extending directly through the second layer. The surface area of the foam exposed through the second layer may be approximately 10- 25% of the total area of the surface of the foam. The second layer may be formed of a plurality of straight parallel strips, each strip may have a width of approximately 0.1 inch, the spacing between the strips being approximately 0.025 inch. The sound absorbing material may be made by a continuous process in which the reacting elastomer mixture is deposited on to a moving belt formed with indentations against which a sheet of foamed plastics material is pressed. Alternatively the second layer may be sprayed or otherwise coated over the foamed layer using a mask or grid, or extruded thereon in the form of individual strips. The second layer may also be formed by providing the first layer with a continuous coating and pressing a mask or grid thereagainst to form the coating into a perforate layer or scraping portions of the continuous coating from the face of the first layer to provide the second layer.
GB29768/73A 1974-06-26 1974-06-26 Sound absorbing material Expired GB1481163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB29768/73A GB1481163A (en) 1974-06-26 1974-06-26 Sound absorbing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29768/73A GB1481163A (en) 1974-06-26 1974-06-26 Sound absorbing material

Publications (1)

Publication Number Publication Date
GB1481163A true GB1481163A (en) 1977-07-27

Family

ID=10296877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29768/73A Expired GB1481163A (en) 1974-06-26 1974-06-26 Sound absorbing material

Country Status (1)

Country Link
GB (1) GB1481163A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259131A (en) * 1991-08-24 1993-03-03 Edinburgh Acoustical Co Ltd Sound deadening in panels and like building structural parts
FR2685528A1 (en) * 1991-12-20 1993-06-25 Thomson Csf Acoustic absorption device, especially for low frequency, capable of being submerged
WO2001054897A1 (en) * 2000-01-28 2001-08-02 Stankiewicz Gmbh Damping foil consisting of several layers and a method for producing same
US20160303922A1 (en) * 2013-10-24 2016-10-20 Bentley Motors Limited Tyre cavity noise absorber

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259131A (en) * 1991-08-24 1993-03-03 Edinburgh Acoustical Co Ltd Sound deadening in panels and like building structural parts
GB2259131B (en) * 1991-08-24 1995-06-14 Edinburgh Acoustical Co Ltd Sound deadening in floor constructions
FR2685528A1 (en) * 1991-12-20 1993-06-25 Thomson Csf Acoustic absorption device, especially for low frequency, capable of being submerged
WO2001054897A1 (en) * 2000-01-28 2001-08-02 Stankiewicz Gmbh Damping foil consisting of several layers and a method for producing same
US6953105B2 (en) 2000-01-28 2005-10-11 Stankiewicz Gmbh Damping foil consisting of several layers and a method for producing same
US20160303922A1 (en) * 2013-10-24 2016-10-20 Bentley Motors Limited Tyre cavity noise absorber
US11186126B2 (en) * 2013-10-24 2021-11-30 Bentley Motors Limited Tyre cavity noise absorber

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee