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Leak Proofing Fabric Seams: Heat Seaming & Seam Sealing

When filtering fine non-agglomerating particles such as titanium dioxide, carbon black or silica, leakage through the needle holes of a filter can become a significant issue. This leakage loads up expensive absolute filters downstream of production equipment. In laboratories, leakage can reduce assay of retained product leading to inconclusive results and repeats. In other instances, leakages may be a hazard in the workspace or to the environment.

Using state-of-the-art equipment, Filter Holdings is able to heat seam fabrics on their longitudinal seam, eliminating needle holes. For other seams, an FDA compliant sealant can be applied to seal the needle holes.

Commonly used on filters with our Unipore membrane surface treatment, our seam sealing techniques assure that all product material is captured. This helps to improve profitability, eliminates the need for downstream filters, and limits the often expensive and time consuming need to clean up the production environment.

Seam Sealing, Leak Proofing

Surface Release Coating SRC

Surface Release Coating (SRC)

MaxClad II

MaxClad II spanning between fibers


Unipore surface -1000X magnification

Aramid Fiber

Standard Felt Aramid Fiber