公开(公告)号：US3576938A

公开(公告)日：1971-05-04

申请号：US3576938D

申请日：1969-11-07

Applicant: GEN ELECTRIC

Inventor： CAPOTOSTO FRANK A ,  KLINT ROBERT V

IPC: B29C33/60 ,  B29C37/00 ,  B29C65/00 ,  B29C70/84 ,  H01B17/38 ,  H01B17/14

CPC classification number: B29C66/74 ,  B29C33/60 ,  B29C37/0082 ,  B29C66/71 ,  B29C66/73161 ,  B29C66/7461 ,  B29C70/84 ,  B29K2709/02 ,  B29L2031/3412 ,  H01B17/38 ,  B29K2063/00

Abstract: Discloses an electrical insulator that comprises an improved joint for attaching the insulator hardware to the porcelain body of the insulator. The porcelain has a roughened surface, and the joint comprises a thin release coating of solid polymeric material on the roughened surface, a thicker coating of a polymer filled with a dry lubricant overlying the release coating but unbonded thereto, and a filled polymer in the space between the hardware and thicker coating that is bonded to both the thicker coating and the hardware. The release coating prevents the thicker coating from adhering to the roughened surface of the porcelain but is so thin that the thicker coating is still able to mechanically interlock with the roughened surface.