Inventors:
Claude C. Hobbs - Waco TX
Assignee:
Hobbs Bonded Fibers - Groesbeck TX
International Classification:
B01F 304, B32B 100, B32B 300
Abstract:
An evaporative cooler pad has opposing faces and is formed from a substantially noncompressible batt of substantially uniformly distributed natural cellulosic lightweight elongate segments such as aspen wood shavings. The segments are oriented in generally horizontal planes and extend in various directions with respect to each other to form interconnecting interstices and passageways throughout the pad. A preformed hydrophilic foam directly coats substantially all the surfaces of the individual segments. The coating is substantially less than the thickness of the segments so as to increase the cross-section of the segments without interconnecting the segments to each other and without bridging between the segments so that the interstices and passageways throughout the batt remain substantially intact. The foam has a minute cellular structure so that when contacted by water, the foam serves to wick the water along the surfaces of the pad and significantly increase the evaporative efficiency of the pad.