Awi Licensing Company

Armstrong World Industries, Inc.

James L Work

Kenneth G Caldwell

Anthony L Wiker

Dean L Putt

An acoustically absorbent porous panel with a layer constructed from a substantially continuous open-celled porous material comprising a cured foamed cementitious material including a first face and a second face. The first face has a surface with a substantially planar profile and the second face has a substantially geometric pattern of depressions formed therein comprising approximately 50% to approximately 90% of the layer by volume.

Acoustical panel having a honeycomb structure and method of making the same

Using a combination of relatively coarse filler and latex binder, a high solids coating which has a minimum solids content of about 60% by volume, can be produced with a relatively low working viscosity. These very high solids coatings can be applied in thick single layers and oven cured without cracking. They maintain more than 80% of their original wet thickness. The resulting coating provides an extremely hard and durable surface, even on relatively soft mineral fiber board ceiling tiles or wall panels.

High solids, low shrinkage coating

Mineral paper is provided which comprises a wet-laid sheet of 1) fibers, 2) a floc of a silicate selected from the group consisting of mica and vermiculite, the said floc having a cationic polymeric flocculant having a molecular weight in the range of from about 10,000 to about 1,000,000, and 3) a non-ionic polymeric flocculant having a molecular weight of from about 2,000,000 to about 10,000,000. A process is described herein for the preparation of the paper using the two flocculants by first flocculating with the cationic polymeric flocculant and then flocculating in another step with the non-ionic polymeric flocculant to obtain an easily drained flocculated mixture which is dewatered to obtain the mineral paper.

Growing community of inventors

Lancaster, PA, United States of America

James L Work