Berkshire FAQ: 5 Things to Know About Swab Construction

by Michelle R. on April 18, 2014

With so many material options, density variances, absorbency capacities and more, selecting the right swab for your application can be a challenge. Here, Berkshire breaks down some of their most commonly asked questions about swab construction.

  1. What does PPI mean? A standard measure of foam density, the PPI of a swab refers to the number of cells per cubic inch in the foam membrane.
  2. What are reticulated or open cell foam swabs? The cell windows in these structures have been removed by either chemical or thermal means. These swabs typically exhibit excellent particle entrapment and liquid retention capabilities.
  3. What are non-reticulated or closed cell foam swabs? Entirely sealed with cell windows intact, non-reticulated or closed cell foam swabs feature higher density and durability, yet a lower absorption capacity than open cell foams.
  4. What are knitted polyester swabs? Engineered for chemical resistance, knitted polyester cleanroom swabs offer exceptional purity, durability and absorbency with low ionic contamination levels.
  5. What are non-woven polyester swabs? Compatible with most solvents, these swabs are absorbent and non-abrasive with low contamination and NVR levels.

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