B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
B08B 7/04 (2006.01) B08B 3/00 (2006.01) B08B 3/04 (2006.01) B08B 7/00 (2006.01) D06F 43/00 (2006.01)
Patent
CA 2139952
The invention provides a cleaning method in which a solvent such as densified carbon dioxide can be used for rapid and efficient cleaning, but with decreased damage to solid components such as buttons. The method comprises contacting a substrate to be cleaned with a first fluid, removing the first fluid from contact with the substrate while replacing with a second fluid, and recovering the substrate substantially free of the first and second fluids and from the contaminant. The first fluid is a densified gas while the second fluid is a compressed gas. A preferred embodiment of the method includes the use of a pretreatment designed for compatibility with the densified first fluid.
Carty Daniel T.
Iliff Robert J.
Kong Stephen B.
Latham James R.
Mitchell James D.
Clorox Company (the)
North Carolina State University
Riches Mckenzie & Herbert Llp
The University Of North Carolina At Chapel Hill
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