Appliances – Air Permeability

Air Permeability and Venting

Venting tape covers holes to prevent the PU foam from squeezing out during injection while still allowing air flow.

A venting tape can be used to cover all holes on an appliance during injection in order to prevent PU foam from squeezing out. Venting tape covers holes sufficiently while still allowing air flow. This ensures that an excess of pressure is avoided.

The tape used should have a backing that allows sufficient air flow. Furthermore, it should be hand tearable and available as die cuts.