Effects of different heating strategies on infrared-heated polyphthalamides

Infrared welding is one of the contactless joining procedures and is very suitable for welding technical thermoplastics. In this respect, the material is plastified by radiation. Above all, the heating strategy can be defined differently with regard to the power and the time since both gentle and intensive heating methods exhibit individual advantages. These different approaches exert significant effects on the material. In the case of infrared welding, the heating may result in material damage which may have negative effects on the mechanical load-bearing capacity of the joint, primarily with high-temperature thermoplastics. The investigations portrayed here show one approach for the visual and analytical assessment of different heating strategies and their influences on the plastic.