GAS DIFFUSER MEMBRANE WITH COATED SUBSTRATE AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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app pub date -
Oct 15, 2010
filing date -
Jul 3, 2006
priority date (Note) -
Abandoned
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Abstract
A flexible diffuser membrane for diffusing gas into a liquid includes a substrate covered wholly or partially by a thin coating. The substrate is formed by a mold or extruder and is of an elevated temperature upon exiting the mold or extruder. The coating may be applied directly to a selected surface of the substrate just after it exits the mold or extruder and while the substrate is at an elevated temperature and before it may become contaminated by foreign materials. The membrane's manufacturing process may be a substantially continuous process wherein the substrate is continuously formed by an extruder and the coating is applied to the substrate in a continuous manner as the substrate exits the extruder.
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