Activated Carbon Fiber Felt

Activated Carbon Fiber Felt is a non-woven carbon fiber material developed for applications where a porous carbon structure, conductive layer or functional carbon surface is required. Its fiber form, thickness, dimensions and surface characteristics need to match the intended process and finished product. Yuruis supplies standard widths of 1 m and 1.25 m, with customized dimensions and thicknesses available for specific production requirements.

Application and Material Selection

The first specification to define is the intended application.

A filtration system may focus on contact with a gas or liquid stream. A composite manufacturer may need a carbon felt that fits a particular layup and resin process. An electrical component may require a defined resistance or conductive path.

These applications do not require the same material configuration. The treated medium, operating temperature, processing method and finished dimensions are therefore useful information when selecting the felt.

For a new project, providing the actual use and basic process conditions at the quotation stage gives a clearer basis for selecting dimensions and material properties.

Material Structure

Activated Carbon Fiber Felt is made from PAN-based carbon fiber in a non-woven structure. The fibers are chopped and distributed through the felt rather than woven into continuous warp and weft yarns.

This structure gives the material a different form from woven carbon fiber fabric. It can be supplied as sheet or roll material and processed by cutting, layering or integration into a larger assembly.

Activation is relevant when the carbon surface is required for adsorption or other surface-related functions. Pore development is influenced by the precursor fiber and activation process, so these properties need to be defined for the particular grade rather than assumed from the carbon fiber material alone.

For composite use, the important factors may instead include fiber distribution, thickness, surface condition and resin compatibility. The material configuration therefore follows the construction and process of the finished product.

Material Configuration

Typical Applications

Filtration and Adsorption

The porous carbon structure is relevant to gas and liquid treatment where adsorption or carbon-surface interaction is part of the process.

Material selection is closely related to the treated medium, flow rate, temperature, humidity and target contaminants. In a complete filter, the support structure and pressure drop also affect the working performance.

Chemical Treatment

Carbon fiber felt can be incorporated into selected filtration components and chemical-treatment assemblies.

For corrosive service, the chemical concentration, temperature and exposure conditions are important. Compatibility should be checked for the complete assembly rather than the carbon material alone.

Electrochemical Components

The combination of a carbon fiber structure and electrical conductivity makes the material relevant to selected electrochemical and fuel-cell-related components.

Typical specification factors include electrical resistance, thickness, pore characteristics and the surrounding chemical environment.

Electronic and Shielding Structures

Carbon fiber can provide a conductive layer in selected electronic and shielding applications.

For electromagnetic or RF shielding, the finished structure needs to be tested because substrate, thickness, electrical connections and surrounding materials can influence the measured result.

Composite Manufacturing

The felt can be cut, layered and impregnated with resin in selected composite processes. Its chopped-fiber, non-woven structure differs from woven carbon fabric and provides a different way of distributing carbon fiber through a part.

Resin viscosity, wet-out, curing conditions and the position of the felt in the laminate are relevant during process development.

Dimensions and Customization

Standard widths are 1 m and 1.25 m. Custom dimensions can be discussed for filter assemblies, composite layups, cutting patterns and other downstream requirements.

Thickness

Thickness is customized according to the intended construction and processing method. The required value is normally determined together with the fiber distribution and finished-part design.

Length

Length can be supplied according to the production requirement and customer request. Packaging can be discussed when the material is supplied in longer lengths or prepared for regular production.

Surface

The available surface options are Glossy, Matte and 50% Glossy. The appropriate finish depends on the intended processing and the surface requirement of the finished product.

Technical Properties to Check

Activated carbon performance is affected by the precursor fiber and activation process. A general carbon fiber specification therefore does not define adsorption performance by itself.

Depending on the application, relevant test items may include:

· BET specific surface area

· Total pore volume

· Micropore volume

· Iodine adsorption

· Adsorption capacity

· Electrical resistance

These properties are grade-specific and should be confirmed using the applicable test method when they are part of the product requirement.

For purchasing and production control, an agreed test method and acceptance range provide a more useful reference than a general industry value.

Processing Considerations

The final behavior of the felt can change after it is incorporated into another product.

In a resin composite, resin penetration can cover part of the carbon surface and affect electrical or adsorption behavior. In a filtration system, support material, compression, flow direction and pressure drop can influence the result.

Testing with the actual resin, filter structure, electrical configuration or operating medium gives a more relevant reference for production than testing the material only as a standalone sheet.

For a quotation, the intended application, dimensions, thickness, quantity and main processing conditions are useful starting information.

Frequently Asked Questions

What is Activated Carbon Fiber Felt?

It is a non-woven carbon fiber material made from chopped carbon fibers. Depending on its specification and processing, it can be incorporated into filtration, adsorption, conductive, shielding and composite applications.

How is it different from woven carbon fiber fabric?

Woven carbon fiber fabric uses continuous fibers arranged in defined directions. Activated carbon fiber felt uses chopped fibers distributed through a non-woven structure, giving the two materials different physical forms and processing characteristics.

What applications can use this material?

Application areas include filtration and adsorption systems, selected chemical-treatment components, electrochemical assemblies, electronic or shielding structures and resin-based composite components.

Can the width and thickness be customized?

Yes. Standard widths are 1 m and 1.25 m. Dimensions, thickness and length can be discussed according to the production requirement.

Does the material have adsorption properties?

Activation creates a porous carbon structure that can provide adsorption functionality. Actual performance varies with the material grade and activation process and should be confirmed by testing.

Can it be used with resin?

Yes. The felt can be incorporated into selected resin-based composite processes. Resin type, viscosity, wet-out and curing conditions affect the behavior of the finished composite.

Can it be used in corrosive environments?

It can be considered for selected chemical-service applications. Compatibility depends on the chemical, concentration, temperature and exposure conditions, so the complete assembly should be evaluated before use.

What information is needed for a quotation?

The intended application, width, thickness, dimensions, length, required quantity and main processing conditions are useful. Drawings, existing specifications or samples can also help with non-standard requirements.

Can Yuruis provide samples?

Sample requirements can be discussed according to the intended application and specification. The required dimensions and test conditions are useful when preparing a sample for evaluation.