The effects of weld geometry on the weld strength of thermoplastic resins,
as determined by tests on vibration welds of bisphenol-A polycarbonate and
poly(butylene terephthalate), are evaluated by tests on three weld geometri
es: butt welds, butt welds between specimens of different thicknesses, and
T-welds. It is shown that only butt welds provide a true measure of the inh
erent weldability of resins. (C) 2000 Kluwer Academic Publishers.