Printed circuit techniques for polyethylene surfaces
First Claim
1. The method to apply an electrically conductive circuit into a polyethylene surface which comprises:
- a. forming a transfer by printing onto a flexible sheet carrier a coating with the electrically conductive circuit defined by a mixture consisting essentially of from 30 to 55 weight percent electrically conductive metal flakes and from 45 to 70 weight percent of a member selected from the group consisting of hydrocarbon waxes and high density polyethylene powder;
b. transferring the coating from the sheet carrier to the polyethylene surface and heating the surface to the melting temperature of the polyethylene surface to fuse and permanently incorporate the coating into the polyethylene surface.
2 Assignments
0 Petitions
Accused Products
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.
34 Citations
10 Claims
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1. The method to apply an electrically conductive circuit into a polyethylene surface which comprises:
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a. forming a transfer by printing onto a flexible sheet carrier a coating with the electrically conductive circuit defined by a mixture consisting essentially of from 30 to 55 weight percent electrically conductive metal flakes and from 45 to 70 weight percent of a member selected from the group consisting of hydrocarbon waxes and high density polyethylene powder;
b. transferring the coating from the sheet carrier to the polyethylene surface and heating the surface to the melting temperature of the polyethylene surface to fuse and permanently incorporate the coating into the polyethylene surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification