Abstract
Weldability of polysulfone had been studied and possibility of the welding had been already clarified.Namely, it was made clear that welding strength of P.S.F. was expected to be twice as much of adhesion strength by self-curing resin, and that a welding method to prevent occurrence of bubbles should be developed, since considerable number of bubbles existed in the weld of P.S.F. Study to develop a welding method whereby occurrence of bubbles is suppressed has been made, and satisfactory result of the study is reported hereunder. As a means of bubble-free welding, preparative drying was adopted.Specimens in the size of 10×10×2 mm. were cut out of P.1700 NT made by Nissan Chemical Co. Specimens were adjusted to condition at 20℃ for 48 hours, either in a desiccator or in saline solution;thence they were preparatively dried for 0.5-24 hours at 100-160℃ by a fixed temperature blower-dryer (DK 42 type made by Yamato Kagaku). These results lead to the conclusions as follows:It was found that occurrence of bubbles at the weld of P.S.F. can be prevented by preparative drying at 160℃ for 3-3.5 hours.
