Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1988-05-17
1990-05-01
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
156 49, 156 86, 219535, 264 36, 264105, 264249, B29C 6102
Patent
active
049216481
ABSTRACT:
A method of joining a substrate, particularly a polymeric pipe for transporting fluids, e.g. natural gas and water, to an article which is not heat-recoverable and which comprises a conductive polymer composition. The article is heated by passing electrical current through the conductive polymer. The heated article makes direct contact with and fuses to the substrate, and is preferably a coupler which is used to join two pipes together. The conductive polymer preferably comprises carbon black dispersed in a sintered polymer, particularly ultra high molecular weight polyethylene, or carbon black dispersed in a very high molecular weight polymer, particularly polyethylene having a molecular weight greater than 150,000.
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Rosenzweig Nachum
Soni Pravin L.
Burkard Herbert G.
Gerstner Marguerite E.
Raychem Corporation
Richardson Timothy H. P.
Thurlow Jeffery
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