Foamed composite panel with improved acoustics and durability

Details Foamed composite panel with improved acoustics and durability Foamed composite panel with improved acoustics and durability

B - Operations, Transporting

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B

B32B 3/12 (2006.01) B32B 5/22 (2006.01) C04B 26/02 (2006.01) E04B 1/86 (2006.01) G10K 11/162 (2006.01) B29C 67/24 (2006.01) E04B 1/84 (2006.01)

Patent

CA 2323340

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 50µm to about 250µm. The acoustic panel achieves very high sound absorption properties without the need for additional surface perforations, while maintaining a very high surface hardness.

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