| 摘要 |
PROBLEM TO BE SOLVED: To uniformly disperse conductive particles, and favorably weld a connected member, by forming a low crystalline copolymer comprising crystalline polyolefins, α-olefins having specific, number of carbons and the other α-olefins, and a heating element for an electrically welded coupling comprising conductive particles. SOLUTION: An electric welding coupling 10 comprises an inner layer sheet 1, a ringlike electrode 2 and a coupling main body 3. The coupling main body 3 has a heating element 31 formed by kneading conductive particles with thermoplastic resins, and an outer layer 32 formed of shape memory resins, arranged on the outer surface of this heating element 31, and the heating element 31 comprises low crystalline copolymer comprising crystalline polyolephines, α- olefins having two or three carbons and the other α-olefins, and conductive particles. This heating element 31 uses preferably 50 to 95wt.% of crystal polyolefins, 65 to 85wt.% of a resin mixture comprising 50 to 5wt.% low crystalline copolymer and a composition comprising 35 to 15wt.% of conductive particle. |
