Laser welding between two opaque black plastics can be challenging because absorption of laser light by the black plastic can lead to increased complexity in the welding process. However, some specific laser welding technologies and methods can overcome these challenges and make welding between black plastics possible. Here are some possible approaches:
Increase laser power:
Because black plastic has a greater ability to absorb light energy, it may be necessary to increase the laser power to provide sufficient heat for welding.
Use lasers of different wavelengths:
Certain laser wavelengths may be better suited for penetrating black plastic, such as infrared lasers. Selecting the appropriate laser wavelength can improve welding efficiency.
Use appropriate fillers:
In some cases, adding appropriate fillers or additives can improve the adhesion and welding performance between black plastics.
Adjust welding parameters:
Laser welding parameters such as focal length, scanning speed and laser beam diameter were optimized to suit the characteristics of black plastic.
Preheating or preprocessing:
Before welding, preheating or pretreating black plastic can improve its surface adhesion and welding performance.
Despite these challenges, laser welding between black plastics is still possible in some cases with the proper technology and methods. In practical applications, it is recommended to conduct sufficient experiments and tests to determine the best welding scheme and ensure the quality and stability of the welding.
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