What should I do if the strength is not enough during ultrasonic welding?

What should I do if the ultrasonic welding strength is not enough, is the product firm after welding? If we want to understand the strength of ultrasonic welding, we first need to know that the strength of ultrasonic welding operation can never reach the strength of integrated molding, it can only be said to be close to the strength of integrated molding, and its welding strength requirements must depend on some coordination, coordination what is it?

Plastic material: The mutual fusion effect of ABS and ABS is definitely stronger than the mutual fusion strength of ABS and PC, because the melting point of two different materials will not be the same, of course, the melting strength cannot be the same, although we discussed ABS and PC. Can materials be welded to each other? Our answer is yes, but is the combined power what we want? uncertain! On the other hand, what if ABS melts with nylon, PP, PE? If the ultrasonic horn emits heat energy of 150 degrees in an instant, the ABS material has melted, but nylon, PVC, PP and PE will only soften. We continue to increase the temperature to above 270 degrees, at this time, nylon, PVC, PP, PE have reached the ultrasonic welding temperature, but the ABS material has been decomposed into another molecular structure! Three conclusions can be drawn from the above discussion:

1. The melting strength of plastic materials with the same melting point is stronger.

2. The larger the melting point difference of the plastic material, the smaller the welding strength.

3. The higher the density of the plastic material (hard), the lower the welding strength (high toughness)