In today’s post we will be breaking down different fabric treatments for baghouse filters and how these pretreatment processes effect your filter medium.
- Calendering: High pressure pressing of the fabric by rollers to flatten or smooth the material.
- Napping: This is the scraping of the filter surface across metal points or burrs on a revolving cylinder.
- Singeing: This is done by passing the filter material over an open flame, removing any straggly surface fibers.
- Glazing: High pressure pressing of the fiber at elevated temperatures. The fibers are fused to the body of the filter medium.
- Coating: Involves immersing the filter material in natural or synthetic resin such as polyvinyl chloride, cellulose acetate, or urea-phenol.
Some of the results and reasons to use these pretreatments are:
- Calendering: Result is that it flattens, smooths or decorated the filter medium. This can increase surface life, dimensional stability, and provides a more uniform fabric surface.
- Napping: The result is that it raises surface fibers, which can provide extra areas for interception and diffusion.
- Singeing: Removes straggly fibers and provides a uniform surface area.
- Glazing: Fibers are fused to the filter medium as a result. This improves mechanical stability.
- Coating: This helps to lubricate woven fibers. Coating helps provide high temperature durability as well as chemical resistance for various fabric material.