| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the joining strength and reliability of a molding by a method wherein the joining surfaces to be welded are welded after the joining surfaces to be welded are treated with a surface treating agent having a lubricity. SOLUTION: A resin molding is produced by adding additives such as a crystalline nucleating agent such as a talc, a kaolin, an organic phosphor compound or the like, a color protective agent, an antioxidant or the like to one kind or more of a resin selected from the group consisting of a polyamide resin, the major constituent components of which are amino acid, a lactam or a diamine, a dicarboxylic acid, an aromatic polyester resin, a polyphenylene sulfide resin. The surfaces of joining surfaces, through which two or more of these resin moldings are welded together, are treated by applying or spraying a surface treating agent having a lubricity selected from the group consisting of a plasticizer, a lubricant and a lubricating oil and diluting with an organic solvent such as methanol, acetone, methyl ethyl ketone. The surface- treated joining surfaces of resin moldings are joint to each other through the melting by a vibrational welding, a spin welding or the like. Thereby the joining strength and reliability of the joining can be improved.</p> |
