Inventors:
Chester W. Hallett - North East MD
John Felegi, Jr. - Lancaster PA
William F. Fry - Columbia PA
Robert D. Lewis - Landisville PA
Alfred H. Adey - East Petersburg PA
Assignee:
AWI Licensing Company - Wilmington DE
International Classification:
B32B 522
US Classification:
4283179, 4283155, 4283157, 4282921, 4282951, 4282974, 181284, 181286, 181288, 181294, 521 68, 521134, 521138, 521 841
Abstract:
An acoustical panel formed from a fibrous, open-celled material comprised of up to about 50% by weight fibers, between about 3% and about 10% by weight binder, between about 20% and about 75% by weight filler and about 0. 01% to about 2. 0% by weight surfactant. Additionally, voids are formed within the panel having an average distribution size diameter of about 50 m to about 250 m. The acoustic panel achieves very high sound absorption properties without the need for additional surface perforations, while maintaining a very high surface hardness.