QuietPro is a light weight, water resistant, sound and energy absorbing panel system. It has principal uses as an acoustic liner within air inlet trunks and other sea water exposed (occasional splash wetting) areas. It is also used
as an energy absorbing treatment to dampen sound and vibration on thin panels, and as a light weight thermal treatment that does not absorb condensation.
This product is made of expanded polypropylene pellets formed into rigid boards. The technology is based on recent developments related to energy absorbing plastics used for automobile crash protection. The material exhibits high chemical and moisture resistance derived from the special chemistry of
the polypropylene resin. These chemistry modifications also enhance its
unique sound absorption and damping properties. The material is molded using a process of expanding polypropylene beads with hollow cavities. The expanded beads are non-porous, but the hollow cores and cracks between adjacent beads
allow sound into a labrynth-like path where energy is absorbed. The hydrophobic nature of QuietPro allows sound absorption from a material that holds much less water than fiber based acoustic materials.