Abstract
In order to secure the best conditions of plastic welding, two kinds of plastics, polyvinylchloride and polyethylene which are widely used in the industry, were choosen. They were welded in several conditions of welding. temperature, welding velocity and welding gas pressure. The tensile test have been done with these specimens. The results of these experiments are comsidured to show that these plastics has a tendency to have maximum strength at certain temperature and gas pressure, as shown in Fig. 2, 3.
As to the effects of acid and irradiation in various welding conditions, polyvinyl chloride has been affected more than polyethylene.
