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US 2017/0089014 A1Published application
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.
Claims20
An acoustical tile comprising:
- 8 to 25 wt % mineral wool,
- 9 to 15 wt % starch binder,
- 9 to 15 wt % cellulosic fiber, and
- 40 to 65 wt % perlite,
- wherein a weight ratio of the starch to the cellulosic fiber is 0.6 to 1.3:1.
2 more elements
A process for manufacturing acoustical tile in a water-felting process, comprising:
- mixing an aqueous slurry comprising water and, ingredients comprising on a water free-basis:
- 8 to 25 wt % mineral wool,
- 9 to 15 wt % starch binder,
- 9 to 15 wt % cellulosic fiber, and
- 40 to 65 wt % perlite,
- wherein a weight ratio of the starch to the cellulosic fiber is 0.6 to 1.3:1.0;
- continuously flowing the slurry onto a moving foraminous support wire to form a cake;
- dewatering the cake to form a base mat such that the cake has a drain time of less than 20 seconds;
- and
- drying the base mat to produce the acoustical tile.
7 more elements
Dependencies are inferred from the claim text.