Electricity: motor control systems – Specific feedback condition or device – Load or torque
Patent
1996-10-18
1998-06-09
Mai, Ngoclan
Electricity: motor control systems
Specific feedback condition or device
Load or torque
134 4, 134 42, 427 5, 427 6, 427156, 976DIG376, G21F 900
Patent
active
057637342
ABSTRACT:
A method for containing or removing contamination from a substrate includes applying a material such as a polyurea elastomer to the contaminated substrate. Preferably, the material sets in less than about 1 hour and is substantially unaffected by exposure to radiation. The contaminants can be contained or shielded on the substrate by the material to reduce exposure to the contaminants. In one preferred embodiment, this invention relates to the encapsulation of objects or surfaces to shield persons in the area from contamination. Alternatively, the material can be removed from the substrate to remove contaminants. Preferably, the material provides a Decontamination Factor of at least about 10. In another preferred embodiment, the material is applied hot to the contaminated substrate to increase its effectiveness in removing contaminants. The present method can also prevent contamination of an uncontaminated substrate. The invention also provides a decontamination material including a polyurea elastomer and a wax.
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Greer Harold B.
Hull John H.
Nachtman Thomas J.
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