Printed circuit techniques for polyethylene surfaces
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United States of America Patent
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Mar 9, 2004
Grant Date -
Mar 20, 2003
app pub date -
Sep 17, 2001
filing date -
Sep 17, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Electrical circuit elements such as electrically conductive strips are permanently applied to the surface of polyolefin parts, such as polyethylene parts which are manufactured by rotational molding, by use of a transfer which can be applied to the interior surface of a rotational mold at the start of the molding cycle or can be applied to the molded part after its formation. The transfer comprises a carrier sheet on which the conductive circuit elements are printed with a mixture of wax or polyethylene powders containing from 30 to about 60 weight percent of conductive particles, preferably metal flakes. After application, the carrier sheet is removed and the conductive circuit elements are permanently incorporated into the surface of the polyethylene part by heating, either during the rotational molding cycle or by post-cycle heating of the formed part.
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