Patent ID: 7105216
Filing Date: 2006-09-12
Classification: B29C,B29K,B29L,B32B,F16L,Y10S,Y10T

Abstract:
1. A conductive-resin-coated steel pipe, characterized in that a coating of reprocessed resin ( 3 ) comprising polyethylene, ABS, AAS, or polypropylene, is formed on an entire outer circumferential surface of a steel pipe ( 2 ) and a coating of conductive resin ( 4 ), said conductive resin comprising polyethylene, ABS, AAS, or polypropylene, which said conductive resin is combined with a filler, is formed on an entire outer circumferential surface of said coating of reprocessed resin ( 3 ), wherein said coating of conductive resin consists of plural thinner-and-wider layer-portions ( 4 a ) and plural thicker-and-narrower layer-portions ( 4 b ) to exhibit electrical conductivity, which said portions alternate along said entire outer circumferential surface of said coating of reprocessed resin and arranged in a circumferential direction of said pipe, and said coating of reprocessed resin and said coating of conductive resin form a two-layer coating that covers the entire outer circumferential surface of said steel pipe, provides a smooth outermost circumferential surface and has a uniform cross-section in an axial direction of said pipe.