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US 2015/0129355 A1Published application
Composite sound absorber
AssigneeZephyros, Inc.
InventorsMichael William Coates, Marek Kierzkowski, Philip John Gibbons
Life of this patent
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Abstract
A sound absorbing material comprising a nonwoven fibrous acoustic insulation material and a flow resistive nonwoven facing, wherein the flow resistive nonwoven facing is bonded to the insulation material and has an air flow resistance of from about 600 to about 1800 Rayls and a surface mass of from about 20 to about 150 g/m2.
Claims21
A sound absorbing material comprising:
- a nonwoven fibrous acoustic insulation material comprising a fibrous web formed by air laying or carding;
- and
- a flow resistive nonwoven facing,
- wherein the flow resistive nonwoven facing is bonded to the insulation material by a powderized adhesive, and
- wherein the flow resistive nonwoven facing has a smaller average fiber size than an average fiber size of the the fibrous acoustic insulation material to enhance the sound absorption of the sound absorbing material.
2 more elements
(canceled)
A method of forming a sound absorbing material comprising:
- scatter coating a powderized adhesive onto one side of a nonwoven fibrous acoustic insulation material;
- laminating a flow resistive nonwoven facing to the one side of the nonwoven fibrous acoustic insulation material,
- wherein the nonwoven fibrous acoustic insulation material includes a pressure sensitive adhesive (PSA) substance on an opposite side of the nonwoven fibrous acoustic insulation material,
- wherein the PSA substance allows the sound absorbing material to be adhered to a target surface.
1 more element
Dependencies are inferred from the claim text.