Open Cell Aluminum Foam Sheet for Sound Absorption, Filtration and Heat Exchange

Product Description

Open Cell Aluminum Foam Sheet for Sound Absorption, Filtration and Heat Exchange

Open cell aluminum foam sheet is selected when a component requires a metal-based porous structure for sound absorption, fluid filtration or heat exchange.

·  Porous Structure: Matched by pore size, porosity and open-cell rate.

·  Application Matching: Selected for sound absorption, filtration and heat exchange components.

·  Project Configuration: Cell size, open surface and sheet dimensions reviewed against project requirements.

Product Description

Open Cell Aluminum Foam Product Definition

Open cell aluminum foam is a single foam sheet with interconnected pores, not a foam core bonded between dense face sheets. Its pore network admits sound waves and allows gases or liquids to pass through, supporting acoustic, filtration and heat transfer duties.
Sound absorption is not the same as sound insulation. Open cell aluminum foam absorbs sound by allowing acoustic waves to enter the interconnected pores, while sound insulation mainly relies on blocking or reflecting transmission. Projects focused on transmission loss should evaluate a closed-cell or sandwich construction.

Open Cell vs. Closed Cell vs. Sandwich Panel

Choose open-cell foam when an interconnected flow path is required; use a different construction for transmission blocking or a faced structural assembly.

Product	Cell / Layer Structure	Fluid Passage	Primary Selection Intent	Typical Form
Open cell foam sheet	Connected pores	Yes	Sound absorption, filtration and heat exchange	Single foam sheet
Closed cell foam sheet	Independent sealed cells	No	Sound insulation, energy absorption and impact-related uses	Single foam sheet
Foam sandwich panel	Foam core with bonded face sheets	Depends on core and facing design	Composite structural, thermal or acoustic project requirements	Face sheet + foam core + face sheet

Key Specifications and Supply Options

Large, middle and small cell products can be opened on one or both sides; middle- and small-cell surfaces are exposed by blasting away the skin.
Acoustic reference: a sound absorption coefficient of 0.52-0.85 is listed for a 20 mm open-cell plate at 2,000 Hz. Do not extend it to other thicknesses, pore structures, frequencies or installations without validation.

Selection Parameter	Available Information
Open-cell structure	Interconnected pores; large, middle and small cell configurations are described
Pore diameter	0.5-10 mm
Porosity / voidage	60%-70%
Open-cell rate	>=92%
Density	0.25-1.05 g/cm3
Thickness and sheet size	Specified for the project and confirmed in the quotation

How to Select for Sound Absorption, Filtration or Heat Exchange

· Sound Absorption
Match frequency range, thickness, pore structure and installation space. Backing, air gap, mounting area and surrounding construction also affect the result, so select the sheet as part of the acoustic system.

· Filtration
For gas or liquid filtration, specify the medium, particle size, flow rate, allowable pressure drop and cleaning method. Filtration efficiency and resistance must be matched to the pore characteristics and operating system.

· Heat Exchange
The interconnected network increases contact between a flowing medium and the aluminum framework. Specify fluid, temperature, flow, corrosion environment, required surface area and connection method; heat transfer capacity remains a system result.

Processing, Customization and Validation

Large, middle or small cells and one- or two-sided open surfaces are available. The material can be saw-cut; specify cut dimensions, edge condition and any painted-surface requirement.

1.   Define the duty: Provide the function and operating conditions.

2.   Match the structure: Confirm pore diameter, porosity, open-cell rate, density and open surface.

3.   Validate: Evaluate the selected structure under the intended mounting, flow or temperature condition when performance must be demonstrated.

4.   Lock the order: Record structure, dimensions, acceptance items and packaging in the order specification.

Applications

Architectural Acoustic Panels

Open cell aluminum foam sheets can be used in acoustic ceilings, wall panels and other architectural sound-absorbing structures. Pore structure, sheet thickness, backing space and installation method should be matched to the target acoustic environment.

Noise-Control Structures

Open cell aluminum foam can be integrated into transportation and industrial noise-control structures as a sound-absorbing porous metal layer. Selection should consider frequency range, panel thickness, backing construction and mounting conditions.

Industrial Acoustic Structures

Open cell aluminum foam can be used in industrial acoustic screens, equipment enclosures and machinery noise-control structures. Selection should consider the target frequency range, pore structure, sheet thickness, backing space and mounting method.

Inspection, Packaging and Batch Delivery

Batch acceptance should focus on the structure and dimensions that control the intended function:
·   Structure: Cell configuration, open surface, pore diameter, porosity, open-cell rate and density.
·   Dimensions: Thickness, sheet size, cut dimensions and edge condition.
·   Validation: Agreed acoustic, flow or heat-transfer evaluation for the defined condition when required.
·   Delivery: Protection for porous faces and edges, sheet separation, batch labels and agreed documents.
Production MOQ is 7,000 kg. Confirm packaging, batch division and timing against dimensions, quantity and validation requirements.
Processing, Customization and Validation
Send the application conditions, target pore structure, sheet dimensions, quantity and validation requirements to Henan Chalco Aluminum for specification review and quotation.

RFQ Input	Information to Provide
Function and conditions	Application; frequency, medium, flow, temperature and installation
Pore structure	Pore diameter, porosity, open-cell rate, density and open surface
Sheet configuration	Thickness, width, length, cut size and edge requirement
Validation	Sample purpose, test condition, acceptance item and report format
Commercial	Quantity, batch plan, packaging and destination

Company Profile

Production Capability

Henan Chalco specializes in aluminum solutions for industrial and engineering projects, combining aluminum material production with downstream processing, inspection, and project-based supply support. Our manufacturing capabilities cover rolling, extrusion, forging, precision machining, and surface treatment.

Customer Cooperation and Feedback

We have established cooperative relationships with customers from different industries and markets. Our product quality, specification consistency, responsive communication and delivery coordination have received positive feedback, helping build trusted and lasting partnerships.

FAQ

FAQ

1. What is open cell aluminum foam?
It is aluminum foam with interconnected pores that admit sound waves and allow fluid passage.

2. Is open cell aluminum foam used for sound absorption or sound insulation?
Its primary acoustic role is sound absorption. Evaluate closed-cell or sandwich constructions when transmission loss is the main target.

3. How should pore size and porosity be selected?
Match them to frequency and installation for acoustics, or to medium, particle size, flow and pressure drop for filtration.

4. Can aluminum foam sheets be customized for filtration or heat exchange applications?
Pore structure, density, open surface, dimensions and cutting can be reviewed against the component and operating conditions.

5. What information is needed for quotation and sample evaluation?
Provide application, pore structure, dimensions, quantity and operating conditions. Production MOQ is 7,000 kg; sample requirements depend on the requested configuration.