Open-pored PUR foam materials based on polyester or polyether are typically used for the filtration of gases and liquids.
Filters are used—similar to a sieve—to separate out solids from a gas or liquid flow. The medium to be filtered flows through a filter material that creates a resistance to the particles of the medium. Even smaller particles are captured in addition to those that are larger than the filter cell size.
In this case, special open-pored PUR flexible foam materials are used. These filter foam materials have so-called “controlled pores”, i.e. a defined, uniform cell size that can differ depending on the application. Special chemical or physical methods can further increase the open cellular structure.
Inserts made of PUR filter foam. The combo inserts consist of a top and bottom part and are used for air filtration in the intake area of gas-powered forklifts.
Filter foam materials have a defined, uniform cell size, typically measured in PPI (pores per inch). Different cell sizes are recommended based on the application and the medium to be filtered. Ester foam materials range from 10 to 90 and ether foam materials from 10 to 55 PPI.
The top and bottom parts are die-cut to exact contours at low cost and precisely glued together with a self-adhesive that is applied to the top part.
Available as flame-retardant per MVSS 302 upon customer request.
Inserts made of reticulated PUR-ester foam for filtering out coarse to fine dirt particles from the air. Moreover, combo filters made of foam materials with different cell sizes are also used, e.g. for the construction of switch cabinets.
Foam materials based on polyesters are distinguished by their very regular cellular structure and high resistance to oils and greases.
Cut to size or die-cut to exact contours at low cost for larger series; alternatively water jet-cut or cut to shape. Also available as sheets.
Foam materials with different cell sizes can be glued together with open, air-permeable adhesive non-woven.
Inserts made of reticulated PUR-ether foam for waste water filtration in small filter systems or septic tanks. Moreover, combo filters made of foam materials with different cell sizes are also used.
Filter foam materials are typically reticulated, but can also be non-reticulated. Reticulating refers to a physical process for increasing the open cellular structure and therefore the permeability of foam materials.
Cut to size or die-cut to exact contours at low cost; alternatively water jet-cut or cut to shape.
Foam materials with different cell sizes can be glued together with open, water-permeable filter non-woven.