Method and article for microwave bonding of splice closure

A microwave heating tubular closure for receiving one end of a cable having a plurality of wires and for protecting a splice of wires, the closure having a top member and a bottom member, both of said members begin formed of a thermoplastic material and each having an essentially semicircular cross-section, said members being longitudinally attached by a hinge defining two sealing edge generally diametrically opposite said hinge, a first edge of said sealing edges begin on said top member and a second edge of said sealing edges being on said bottom member, wherein the improvement comprises:

• a strip of composite bonding material formed of a plurality of susceptor particles dispersed in a matrix, each of said susceptor particles being constructed of a substrate which is essentially non-reflective of microwave energy, and a coating surrounding said substrate, said coating being substantially absorptive of microwave energy, said coating having a thickness in the range of 1-100 Angstroms and having an electrical conductivity in the range of 10.sup.-6 to 10.sup.7 .OMEGA.-cm, resulting in said susceptor particles having a bulk resistivity in the range of 10.sup.-2 to 10.sup.8 .OMEGA.-cm, and said matrix comprising a thermoplastic material which is miscible with said thermoplastic material of said members, said strip being placed between said sealing edges.