Carbon black (CB)/polypropylene (PP) compounds were marked using a 532 nm Nd:YAG laser. Generally, the presence of a small amount of CB in PP led to a dramatic decrease in ablation threshold. Both thermophysical and photochemical reactions were found cooperative during laser processing of conventional polymers. Discoloration was basically the mechanism operative during laser marking polymer compounds.
ASJC Scopus subject areas
- Materials Science (all)