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US 9,896,807 B2Granted
Acoustical ceiling tile
AssigneeUSG Interiors, Inc.
InventorsMark H. Englert, William A. Frank
Life of this patent
Estimating the term…
Abstract
An acoustical tile including: 8 to 25 wt % mineral wool, 9 to 15 wt % starch binder, 9 to 15 wt % cellulosic fiber, wherein preferably the cellulosic fiber is newsprint, and 40 to 65 wt % perlite, wherein the weight ratio of the starch to the cellulosic fiber is 0.6 to 1.3:1; and a process for making the acoustical tile.
Claims19
An acoustical tile comprising:
- 15.0 to 20.0 wt % mineral wool,
- 9.5 to 10.5 wt % starch binder,
- 12.0 to 14.0 wt % cellulosic fiber, wherein said cellulosic fiber is newsprint, and
- 55.0 to 65.0 wt % perlite,
- wherein the acoustical tile has:
- an absence of glass beads, an absence of clay, an absence of vermiculite, an absence of gypsum, an absence of calcium carbonate, an absence of magnesium carbonate, and an absence of Zinc pyrithione, and
- wherein a weight ratio of the starch to the cellulosic fiber is 0.7-0.9:1.0.
4 more elements
Dependencies are inferred from the claim text.