| Abstract: | The weldabilities of polyamide 6 (PA‐6), polyamide 6,6 (PA‐6,6), 33 wt% glass‐filled PA‐6,6 (33‐GF‐PA‐6,6), and amorphous polyamide (PA‐A) are assessed through 120 Hz vibration welds. Weld strengths equal to those of the base resins can easily be obtained in vibration welds of both undried and dried PA‐6 and PA‐6,6. Relative weld strengths in the range of 54–57% are demonstrated for 120 Hz welds of 33‐GF‐PA‐6.6. Relative weld strengths in the range of 90–97% are demonstrated for dried PA‐A. The highest relative weld strengths obtained in hot‐tool welds of undried and dried PA‐6,6 are only 57% and 54% respectively. |
