US Patent:
20130299418, Nov 14, 2013
Inventors:
Satishkumar Chamyvelumani - Wallingford CT, US
Thomas L. Wood - Hudson WI, US
Keith D. Solomon - Cheshire CT, US
Edward M. Czausz - Meriden CT, US
Aleksander Medved - Shoreview MN, US
Assignee:
3M INNOVATIVE PROPERTIES COMPANY - ST. PAUL MN
International Classification:
B01D 29/00
US Classification:
210504, 264414, 4251748 R
Abstract:
A method of forming a filter element is disclosed comprising introducing a mixture into a feeder, the mixture comprising a plurality of susceptor particles and a plurality of polymeric binder particles. The mixture is advanced through the feeder and into a die comprising an excitation portion where eddy currents are induced in the susceptor particles by subjecting the mixture to a high-frequency electromagnetic field, the eddy currents being sufficient to elevate the temperature of the susceptor particles to cause adjacent polymeric binder particles to be heated to at least a softening point. The susceptor particles bind with the heated polymeric binder particles in the die to form a coherent mass. The coherent mass is advanced out of the die and cooled to form the filter element.
