Benny S. Yam - Holmdel NJ Kenneth S. Colbert - Princeton Junction NJ
Assignee:
Church & Dwight Co., Inc. - Princeton NJ
International Classification:
B08B 700 B24D 300
US Classification:
134 7
Abstract:
A method and abrasive blast medium for cleaning contaminants from electronic hardware. The abrasive blast medium is a pure, water soluble alkaline salt of bicarbonates and carbonates. The particle size of the alkaline salts range from about 20 to no larger than about 300 microns in diameter. The Mohs hardness of the alkaline salt particles is no greater than about 5. The blast cleaning conditions employed to clean the electronic hardware are mild. Blast air pressures range from about 10 to about 50 psi and the medium flow rate ranges from about 1 to about 10 lbs/min.
Sodium bicarbonate can safely remove paint, grease, oil and smoke residue, decreasing workers' exposure to harsh chemicals and eliminating much of the hazardous waste associated with other cleaners. "Sodium bicarbonate is able to clean in areas where other substances pose fire hazards, because baking soda is a natural fire extinguisher," says Kenneth Colbert, a general manager for Arm & Hammer.