Composite Filter Media

Many filters use multiple layers of filter media in filtering particles from fluids. The filter media layers are each selected for a specific purpose in the overall filtration process.

Some layers add strength and act as processing aids to protect the media as it is pleated into the final filter element, while other layers are placed in the filter media structure to remove particles of specific sizes in selected areas of the filter. In many cases, these multiple media are combined by lamination into single composite filtration materials that are used to construct the final filter element.

Composite media have the advantage of allowing media companies to sell higher value products that meet customer needs from their own media production lines. They purchase a roll good from another media company and combine it with their own products to create a filter material that will meet a specific customer requirement.

Composite media are used in both liquid and air applications such as heavy duty oil and fuel filters, aviation fuel separators, HVAC filters, and vacuum cleaner bags, for example. Because they are more specialized, composite filter media are in many cases more difficult to copy and give their producers and users a real head start in the marketplace.

Composite Stratapore Liquid Filter Media Courtesy of Fleetguard Inc.

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