Method utilizing ultrasonically induced cavitation to impregnate porous sheet passing through a resin bath
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United States of America Patent
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-
Nov 12, 1985
Grant Date -
N/A
app pub date -
Apr 9, 1984
filing date -
Apr 9, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of impregnating a flexible, porous cellulosic sheet material involves passing the sheet through a low viscosity resin and across the resonant vibrating surface and through a cavitated zone in close proximity to at least one completely immersed ultrasonic wave generator, operating at a frequency and radiated power level effective to provide a combination vibratory pressure on the resin and cavitation effect causing degassing and heating of the resin, followed by passing the impregnated sheet through a drying means.
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