| 摘要 |
PURPOSE: A manufacturing method of a buoy for fishing net and buoy for fishing net produced by the same method are provided, which can reduce the whole manufacturing cost by reducing mold manufacturing cost. CONSTITUTION: A manufacturing method of a buoy for fishing net is as follows. Thermoplastic resin is uniformly mixed with a cross-linking agent, a foaming agent, zinc oxide, a pigment, and zinc stearate. A sphere main body(10a) having the internal space is formed by injection molding the mixed composition under the temperature that foaming and cross linkage don't occur. The hard reinforcement having the space part is inserted into the main body. The main body is expanded by cross linkage and foaming.
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