Mineral aggregate (perlite) acoustical board

Details Mineral aggregate (perlite) acoustical board Mineral aggregate (perlite) acoustical board

1974-05-07

1976-04-27

Hix, L. T.

Acoustics

Auditorium

252 62, E04B 199

Patent

active

039528308

ABSTRACT:
Monolithic acoustical panels are provided including relatively coarse particles of expanded volcanic glass, such as perlite, and mineral fiber. The panel provides a highly porous structure that possesses desirable noise suppression characteristics, and comprises by weight 45 to 75% of an expanded volcanic glass of which 65-100% will pass an 8 mesh U.S. Standard screen and will be retained on a 50 mesh U.S. Standard screen; 10 to 30% of mineral fiber; 10 to 20% of nongelatinous cellulosic fiber having lengths in the range of about 0.5 to 3.5 mm.; and a total of 10 to 25% of binder and sizing agent.

REFERENCES:
patent: 2884380 (1959-04-01), Cook
patent: 3244632 (1966-04-01), Schulz
patent: 3379609 (1968-04-01), Roberts
patent: 3408316 (1968-10-01), Mueller
patent: 3445253 (1969-05-01), Lee
patent: 3522067 (1970-07-01), McArthur
patent: 3623938 (1971-11-01), Jenkins
patent: 3629116 (1971-12-01), Gartner
patent: 3655564 (1972-04-01), Barrington
patent: 3658564 (1972-04-01), Gerow
patent: 3769065 (1973-10-01), Dunn

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