Thermoformable acoustic product

a technology of acoustic products and acoustic components, applied in the field of sound absorption materials, can solve the problems of application similarly not addressing the practicality of achieving effective sound absorption solutions, and the prior art does not address the practicality of achieving effective sound absorption solutions, and achieves enhanced and consistent acoustic properties, favorable aesthetic appearance, and low cost

Inactive Publication Date: 2006-05-04
ZEPHYROS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0035] The present invention, as detailed above, provides the advantages of a multi-purpose clean, energy efficient, low cost, recyclable material as a thermo-formable acoustic sheet with enhanced and consistent acoustical properties while providing a favorable aesthetic appearance in preferred embodiments. A further advantage is that the present invention provides an insulation that provides a lower resonance than current systems, has superior resilience and predictable mechanical properties.

Problems solved by technology

Flow resistive thermo-formable materials have been provided, however such prior art does not address the practicality of achieving an effective sound absorbing solution.
In particular, environmental, manufacturing and cost issues are a concern, whilst retaining the ability to vary the mechan

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0084] A compressed flow resistive sheet comprising both high melt and low melt bicomponent polyester fibers was formed in accordance with PCT / AU01 / 00880. The sheet comprised 70% 4 denier low melt bicomponent fibers, and 30% 6-denier high melt polyester staple fibers. The total mass of the flow resistive sheet was 1000 g / m2.

[0085] A vertically-lapped spacer web made from 30% 2-denier bicomponent polyester fibers, 20% 12-denier and 50% 6-denier polyester staple fibers was laminated to the flow resistive sheet with heat reactivated hot melt powder applied at a rate of 30 g / m2. The total mass of the spacer layer was 800 g / m2.

[0086] The resultant product had a total flow resistance of 3200 Rayls and was 23 mm thick.

[0087] The composite was tested in an alpha cabin, using Toyota test specification TSL 0600G—Test method for acoustic materials, for sound absorption and transmission loss and the results were compared with a target specification based on the prior art, with the same total...

example 2

[0088] Three samples of spacer layers similar to the spacer layer formed in Example 1 were formed using 2.5, 3.7 and 6 denier average fiber size except that the spacer layer had a total mass of 600 gsm. A plot of the sound absorption coefficient versus frequency of the three samples is shown in FIG. 8.

example 3

[0089] A similar product was formed to the product formed in Example 1 except that the spacer layer was 13 mm thick and had a total mass of 400 gsm. FIGS. 9 and 10 show the effect of the thickness of the spacer layer on the sound absorption coefficient and the transmission loss at frequencies between 200 Hz and 6300 Hz.

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PUM

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Abstract

A thermo-formed acoustic product formed from an acoustic sheet with a relatively high flow resistance, and a layer of porous flow resistive spacer material attached to one side of the acoustic sheet and having a flow resistance substantially smaller than the acoustic sheet. The acoustic product has locally reactive acoustic behavior and an overall air flow resistance of between 2800 Rayls and 8000 Rayls. A decorative facing can be applied to the acoustic sheet.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to materials for sound absorption. More particularly it relates to thermo-formable acoustic products that have enhanced sound absorption properties and can be decoratively faced. [0003] 2. Description of the Related Art [0004] Sound absorption provides a useful means for noise reduction in a wide variety of industrial, commercial, and domestic applications. To achieve the optimum degree of sound absorption, it is desirable to use a composite assembly of different layers, such that the maximum sound absorption is achieved in the minimal possible space, with the lowest possible mass appropriate for the application. [0005] The sound absorption of a porous material is known to be a function of fundamental material properties, including thickness, air flow resistance, mass, stiffness, porosity, tortuosity etc, and application parameters, such as any air space behind the material, or alternatively, ...

Claims

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Application Information

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IPC IPC(8): E04B1/82G10K11/162G10K11/168
CPCG10K11/162G10K11/168
Inventor COATES, MICHAEL WILLIAMKIERZKOWSKI, MAREK HENRYKSIMMONS, JOHN CAMPBELLGASCOIGNE, BRUCE REGINALDGIBBONS, PHILIP JOHN
Owner ZEPHYROS INC
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