QuietPro

Water Resistant Sound andVibration Absorbing Panel

QuietPro is a lightweight, 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 wet- ting) areas. It is also used as an energy absorbing treatment to dampen sound and vibration on thin boat panels, and as a light for boat weight thermal treat- ment that does not absorb condensation.This product is madeof expanded polypropy- lene pellets formed into rigid boat boards. The technol- ogy 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 for boat. These chemistry modifi- cations also enhance its unique sound absorption and damping properties.The material is moldedusing a process of expanding polypropylene beads with hollow cavi- ties. The expanded beads are non-porous, but the hollow cores and cracksbetween 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.QuietPro in 2" thick-ness achieves an NRC value of 0.50. This value provides good sound absorption in moist applications, where fibrous or cellular foam materials cannot be used.The structural stabilityof QuietPro combined with its sound and ener- gy absorbing properties make it an ideal core material for wall panels. A comparison of wall panels using 1.75” core with .625” skin showed that QuietPro increased the sound transmission coefficient by 9dB due to its excellent mechanical energy absorption characteristics.Because of its excel-lent mechanical energy absorption characteris- tics QuietPro is an ideal light weight vibration damper. Quiet Pro
This innovative, water resistant, sound andvibration absorbing product is made ofexpanded polypropylene pellets formed intorigid boards.