Electrically conductive article and method of making the same
OwnerErnest P. Meederinventor
Life of this patent
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Abstract
An electrically conductive article comprises an insulating material, preferably polyurethane or a similar plastic material, with a plurality of thinly coated electrically conductive fibers dispersed randomly and uniformly therethrough. The fibers are thinly coated with a lubricating cohesive silicone oil or equivalent material which adheres to the fibers and repels the insulating material, thereby preventing encapsulation of the fibers and rendering the coated fibers mutually attractive to define conductive paths through the article even at extremely low fiber loadings.
Claims17
An electrically conductive article which is effectively incapable of holding a static electric charge, comprising:
- a flexible mass of resilient insulating material having resilient conductive filaments distributed randomly and effectively uniformly therethrough to define a plurality of continuously conductive paths entirely through said mass, and a thin coating on each said filament of a cohesive lubricating material which is adherent to said filaments and repellant to said insulating material.
A flexible, electrically conductive article which is effectively incapable of holding a static electric charge, comprising:
- a flexible mass of resilient polyurethane;
- and,
- a plurality of carbon yarn filaments dispersed randomly and effectively uniformly through said polyurethane mass to define a plurality of continuously conductive paths entirely through said mass, each said filament being between about 1/20" and 1/8" in length and between about 2-13 microns in diameter, and a thin coating on each said filament of an organopolysiloxane oil.
A method of making a flexible, electrically conductive article of a synthetic resin which has resilient filaments of conductive material dispersed therethrough and which is effectively incapable of holding a static electric charge, said method comprising the steps of:
- (a) thinly coating each of a plurality of said resilient filaments of conductive material with a cohesive lubricating material which adheres to the material of said filaments and repels said synthetic resin;
- (b) blending said plurality of coated filaments with a non-conductive starting material or precursor in a liquid state to obtain an effectively uniform random dispersion of said filaments through said starting material or precursor to provide a mixture;
- and
- (c) forming a flexible, substantially solid mass from said mixture.
Dependencies are inferred from the claim text.