| abstract |
Dissimilar materials are joined to each other with simple equipment at low cost and avoiding occurrence of peeling. A water repellent film is formed on a first bonding surface of a first member made of a polymer material, a metal material, or an inorganic material, and the water repellent film is subjected to an activation treatment. The surface is modified to have a high hydrophilicity and a nylon-6 contact angle of less than 25 °. The second bonding surface 18 of the second member 14 containing at least a thermoplastic resin (excluding the same resin as the polymer material) is superimposed on the first bonding surface 16 on which this film is formed, and heated. Then, the second member 14 is melted. Thereafter, the melted second member 14 is cooled and solidified, and the first joining surface 16 and the second joining surface 18 are joined. At this time, a transcrystal is generated in the vicinity of the interface with the first bonding surface 16 at the second bonding surface 18. [Selection] Figure 2 |