| abstract |
(57) [Problem] To uniformly permeate and disperse a sublimable organic compound which has an affinity with the above-mentioned resin on the surface of a resin molded product, Modification and / or coloring of the resin surface layer is performed. SOLUTION: A resin molded product and an organic compound having an affinity for and sublimation with the resin are placed in a closed container, and the internal pressure and temperature are adjusted to bring the organic compound into a saturated sublimation pressure state. By arranging, the organic compound vapor uniformly adheres to the surface of the resin molded product, and further penetrates and disperses inside, so that the resin surface layer can be modified and / or colored. In addition, functionality can be imparted by modifying the resin surface layer. |