PURPOSE: To enhance the peel strength of a conductor strip and a strip like insulator to a large extent by continuously and thinly applying a thermosetting adhesive to the under surface of the conductor strip.
CONSTITUTION: In subjecting a strip like insulator 2 to extrusion coating, a thermosetting adhesive 12 capable of being bonded to conductor strips 6, 8 and the insulator 2 by the heat at the time of the extrusion coating of the insulator 2 is continuously and thinly applied to the under surfaces of the conductor strips 6, 8. The insulator 2 is composed of heat-resistant polyvinyl chloride and each of the strips 6, 8 is composed of a horizontal stainless steel tape having no slope and the adhesive 12 is pref. a vinyl acetate type adhesive. Since the strips 6, 8 can be formed from copper or tin plated copper and the insulator 2 can be formed using polyethylene, as the adhesive 12, the optimum one is selected according to a material. In the water leak detection wire 1a thus prepared, the strips 6, 8 are not peeled off by peeling force of below about 300gf even if they are pulled from the insulator 2 in a vertical direction.
OKITA HIROSHI
SONE SEIICHIRO
| JPS5813062A | 1983-01-25 | |||
| JPS5813057A | 1983-01-25 | |||
| JPS57163557A | 1982-10-07 | |||
| JPS57203541A | 1982-12-13 |