High noise reduction coefficient, low density acoustical tiles
AssigneeUSG Interiors, Inc.
InventorsWei XU, Thomas M. MAYERS, Scott C. BAKKEN
Life of this patent
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Abstract
Acoustical tile including a dried base mat of: about 70 to about 90 wt % mineral wool; about 5 to about 15 wt % perlite; 0 to about 10 wt % starch; about 3 to about 10 wt % latex; 0 to about 5 wt % gypsum; and less than 5 wt % water. The dried base mat without including glass fibers and without a laminate layer or coating and without perforations has a NRC of about 0.70 or greater, a density of about 10 pcf to about 12 pcf, and a thickness of about ½ to about 1 inch. The acoustical tile can further include a back coating at a surface weight of about 5 grams per square foot (gsf) to about 40 gsf to the dried base mat, wherein the acoustical tile has the CAC rating of about 30 to about 35.
Claims20
An acoustical tile comprising a dried base mat comprising:
- about 70 wt % to about 90 wt % mineral wool;
- about 5 wt % to about 15 wt % perlite;
- 0 wt % to about 10 wt % starch;
- about 3 wt % to about 10 wt % latex;
- 0 wt % to about 5 wt % gypsum;
- and
- less than 5 wt % water, wherein the dried base mat has an absence of glass fibers;
- and
- wherein the dried base mat without a laminate layer, without a coating, and without perforations has a noise reduction coefficient (NRC) of about 0.70 or greater, a density of about 10 pounds per square foot (pcf) to about 12 pcf, and a thickness of about ½ inch to about 1 inch.
An acoustical tile comprising a dried base mat comprising:
- about 60 wt % to about 90 wt % mineral wool;
- about 5 wt % to about 15 wt % perlite;
- 0 wt % to about 10 wt % starch;
- about 3 wt % to about 10 wt % latex;
- 0 wt % to about 5 wt % gypsum about 0.5% to about 10% glass fibers;
- and
- less than 5 wt % water;
- and
- wherein the dried base mat without a laminate layer, without a coating and without perforations has a noise reduction coefficient (NRC) of about 0.75 or greater, a density of about 10 pounds per square foot (pcf) to about 12 pcf, and a thickness of about ½ inch to about 1 inch.
Dependencies are inferred from the claim text.