United States Patent Number 5,250,344
October 5, 1993
Informative
Cast material with encapsulated lubricant
Patent Abstract
A slippery orthopedic cast tape produced by depositing onto a substrate a
layer of microencapsulated lubricating or friction-reducing material. The
substrate is impregnated with a material which is hardenable upon exposure
to an activating agent. The coating of each one of the microgranules is formed
of a material which is removable upon the application thereto of a removing
stimulus. The microencapsulated lubricious material is applied to the inner
end of a rolled cast tape so that it will be adjacent the outer layers of
a formed cast. In one embodiment, the microgranules are formed of a water-insoluble
polymeric coating over a polyethoxylated surfactant which serves as the lubricious
material, the polymeric coating being rupturable upon the application of pressure
in order to release the lubricious material.
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