US6376396B1
Expired / Lapsed
US
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Soundproofing material and the use thereof
Assignee: Beloh Beteiligungsgesellschaft mbH
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Filing: 1998-02-09
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Granted: 2002-04-23
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Expires: 2018-02-09
Abstract
Abstract A soundproofing material made of nonwoven materials containing thermoplastic fibers for the acoustic frequency range of 100 to 5000 Hz is characterized in that the nonwoven material is permanently compacted to a specific flow resistance of RS=800-1400 Ns/m 3 in two stages by a mechanical compaction process and a subsequent pressure/heat treatment.
Inventors
- 👤 Udo Thorn
- 👤 Gholam Reza Sinambari
- 👤 Wolfgang Riediger
- 👤 Georg Jochim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:14
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; D04H1/44; D04H1/46; D04H1/48; D04H1/485; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2721; Y10T442/60; Y10T442/682; Y10T442/697
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
48 words
Soundproofing material for the acoustic frequency range of 100 to 5000 Hz comprising a nonwoven material containing thermoplastic fibres wherein the nonwoven material is permanently compacted to a specific flow resistance of Rs=800-1400 Ns/m 3 in two stages by a mechanical compaction process and a subsequent pressure/heat treatment.
Claim 2
Dependent Claim
48 words
Soundproofing material for the acoustic frequency range of 100 to 5000 Hz comprising a nonwoven material containing thermoplastic fibres wherein the nonwoven material is permanently compacted to a specific flow resistance of Rs=800-1400 Ns/m 3 in two stages by a mechanical compaction process and a subsequent pressure/heat treatment.
Claim 3
Dependent Claim
29 words
The soundproofing material of claim 1 wherein the nonwoven material comprises primary fibres and 10-90% by weight thermoplastic secondary fibres having a softening range of at least 5° C.
Claim 4
Dependent Claim
31 words
The soundproofing material of claim 2 wherein the primary and secondary fibres are those having linear densities of 0.5 to 17 to dtex and staple lengths of 20 to 80 mm.
Claim 5
Dependent Claim
20 words
The soundproofing material of claim 2 wherein the primary fibres are polyethyleneterephthalate fibres and the secondary fibres are copolyester fibres.
Claim 6
Dependent Claim
28 words
The soundproofing material of claim 1 wherein the nonwoven material has a thickness of 0.3 to 3.0. mm and a density of 250 to 500 kg/m 3 .
Claim 7
Dependent Claim
23 words
The soundproofing material of claim 1 wherein the first stage of the compaction of the nonwoven material is implemented by a needling process.
Claim 8
Dependent Claim
30 words
The soundproofing material of claim 1 wherein the second stage of compaction is implemented within the softening range of the secondary fibres at line pressures of 0.5 to 3.0. KN/cm.
Claim 9
Dependent Claim
21 words
The soundproofing material of claim 1 wherein the compacted nonwoven material has a specific flow resistance of 1100±150 Ns/m 3 .
Claim 10
Dependent Claim
34 words
The soundproofing material of claim 1 wherein the nonwoven material has a flame-retardant finish resulting from application thereto of a composition comprising at least one of metal hydroxides, ammonium polyphosphates, melamine and red phosphorous.
Claim 11
Independent Claim
64 words
A method of achieving a broadband sound-absorbing effect for indoor soundproofing by a combination of resonator and porous absorption mechanisms, comprising providing a layer of a soundproofing material according to any one of claims 1 to 9 in conjunction with an air gap whose width depends on the lowest frequency to be countered, said air gap being behind the layer of the soundproofing material.
Claim 12
Dependent Claim
38 words
The method of claim 10 , further comprising providing at least one additional layer of the soundproofing material spaced from the other layer, whereby dips in the degree of absorption in the frequency range of interest are avoided.
Claim 13
Independent Claim
24 words
A method for secondary soundproofing indoors comprising covering a surface with a soundproofing material according to any one of claims 1 to 9 .
Claim 14
Independent Claim
55 words
A method of making soundproofing material for the acoustic frequency range of 100 to 5000 Hz comprising permanently compacting a nonwoven material comprising thermoplastic fibers to a specific flow resistance Rs=800-1400 Ns/m 3 by first mechanically compacting the nonwoven material and then subjecting the mechanically compacted nonwoven material to a combination of pressure and heat.
Claim 15
Independent Claim
55 words
A method of making soundproofing material for the acoustic frequency range of 100 to 5000 Hz comprising permanently compacting a nonwoven material comprising thermoplastic fibers to a specific flow resistance Rs=800-1400 Ns/m 3 by first mechanically compacting the nonwoven material and then subjecting the mechanically compacted nonwoven material to a combination of pressure and heat.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-04-22 | 2005-10-22 | 2006-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-22 | 2009-10-22 | 2010-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-22 | 2013-10-22 | 2014-04-23 | $7700.00 | Window Closed / Lapsed |