PROBLEM TO BE SOLVED: To provide a microwave heating drying method by which coating film quality is improved by fully suppressing pinhole growth, smoothness of the coating film can be made very good, process time can be greatly shortened and drying of the coating film can be finished only by a process of microwave heating.;SOLUTION: The microwave heating drying method for drying the coating film by irradiating the coating film 31 on a surface of an object to be coated 17 with microwave after application of a coating material on the object to be coated 17, comprises a setting process 41 in which the object to be coated and the coating film are left as they are at room temperature, a heating up process 42 in which the coating film is irradiated with the microwave 32 to heat up the object and the coating film till coating film viscosity lowers and then begins to rise and a hardening process 43 in which irradiation of the coating film with the microwave is continued to further raise the coating film viscosity to harden the coating film.;COPYRIGHT: (C)2007,JPO&INPIT
展开▼
