Sekisui Chemical Co., Ltd.

Ayaka Kitagawa

Hiroaki Kondou

Kouzou Makino

Tsuyoshi Katou

Amiko Sakamoto

An electrofusion joint includes a tubular main body, a stopper portion, a first heat generation section, and a second heat generation section. The tubular main body includes a joint receiving portion. The stopper portion projects inwardly on an inner surface of the tubular main body. The first heat generation section includes a first heater wire wound and arranged at the joint receiving portion. The second heat generation section includes a second heater wire wound so that wound parts of the second heater wire are adjacent to each other and the second heater wire is in the stopper portion. The first heat generation section includes at least one heat generation portion in which the first heater wire is wound so that wound parts of the first heater wire are adjacent to each other.

Electrofusion joint and fusion method

An electrofusion joint includes a main body and a heating wire. The main body is configured to be connected to a resin pipe containing a thermoplastic resin. The heating wire is in the main body. The heating wire includes a conducting wire and an insulating cover film that is around the conducting wire. The insulating cover film has a melting point of at least 230 degrees.

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Kyoto, Japan

Ayaka Kitagawa