Polyesters are a class of polymers that include PET (polyethylene terephthalate), PET-G and Mylar®. Laser processing of polyesters can be performed with either a 9.3 or 10.6 micron CO2 laser. Polyesters do not readily absorb the energy from the 1.06 micron fiber laser and is not recommended for this material. Laser cutting of polyesters with a CO2 laser results in clean edges free of discoloration and limited melting. Laser engraving of polyesters with a CO2 laser results in depth, high contrast, and limited melt back at the point of ablation. Laser marking of polyesters with a CO2 is not recommend as the wavelength will not make a contrasting mark.
Applicable Laser Processes for Polyester