Blog Details

Polyurethane foam filter

Polyurethane foam filter

Reticulated foam is available in two primary types, polyether and polyester and a range of densities and colors. A fine porosity, 100 PPI (pores per inch) reticulated foam is used in a wide variety of applications such as:

  • Sound absorber in anechoic chambers
  • Microphones
  • Windscreens
  • Filters
  • Face masks
  • Wiping pads and applicators

When reticulated foam is compressed, the material takes on a new set of properties ideal for other applications requiring high void volumes, uniform porosity, non-directional characteristics, exceptional breathability and uniform texture. Reticulated foam is often compressed and used for creating ink rollers, blood filters, and other products requiring wicking properties.

Polyester Foam
Reticulated polyester urethane foams have a three-dimensional skeletal strand structure that minimizes the possibility of open channels and provides excellent filtration properties. Polyester foam is a flexible, open-cell type of polyurethane foam that is porous and has a uniform cell structure. It has an evenly spaced cell structure with a high proportion of closed cells or “windows” that reflect light. The large amount of windows makes polyester foam ideal for sealing as it naturally prohibits the flow of air. The uniform cell structure inherent in polyester foam also makes it ideal for the reticulation process. Polyester foam can be easily compressed, forming sheets with a fixed, desirable thickness. Additives introduced during manufacturing can transform the foam properties making it flame retardant, anti-microbial, anti-static, conductive and/or electrostatic dissipative (ESD). Felted polyester filter foam has a highly restrictive cell structure and is largely used for air and liquid filtration.

Polyether Foam
Reticulated polyether urethane foams were developed for increased hydrostatic stability. Polyether foam is a flexible, compressed, open-cell type of polyurethane foam that is smooth in texture.  Polyether foam is manufactured by mixing polyether polyols with catalysts and a blowing agent, forming a free-rising, foamy froth that solidifies within minutes resulting in a slab stock bun of polyether foam ready for fabrication. The protective and cushioning properties of polyester foam make it an ideal material for packaging applications. It has a high viscosity rate, superior solvency qualities and is resistant to abrasion and cutting. It is used widely in the medical, apparel and sports industries.