Laser plastic joining is a kind of transmission welding technology, which applies laser beam with high energy to melt two plastic parts to finish joining under pressure. For laser plastic welding, one parts must be with at least 17% IR (infra-red light) transmittance while the other one must be IR absorptive or coating at the interface to be IR absorptive. During laser plastic welding, the two parts are close under pressure while the laser beam is moving along the joining line in fixed speed. The laser beam passes the transmissive part and be absorbed by the other parts at the welding interface to generate heat and soften the two parts at the interface, then permanent plastic welding is resulted under pressure.
MP Sonic laser welding machine for plastic material applies semiconductor laser system to realize joining to thermoplastic parts. Semiconductor laser wave length is from 800nm to 1000nm.