Speaking about plastics means referring to derivatives from very different chemical compositions, which influence the performance of the processes applied to them, including laser marking.
The different laser sources and the great specialization of modern laser technology today allow us to mark all types of plastic, although the reactions due to color pigments and other additives are very different.
The most popular lasers for plastic applications are the famous UV laser, the green wave FlyPeak laser by LASIT and the traditional green light Laser, with fiber optic source. In most cases, we recommend using a MOPA laser, meaning with variable pulse: thanks to the pulse duration control, this laser ensures maximum performance in the most difficult applications.
The most common processes of laser marking on plastic are carbonization, color change, foaming and engraving.
As a first approach for verifying the effect of marking on a new plastic material, it is advisable to use:
In most cases pressing too much when marking can be counterproductive and can decrease the final contrast, so it is better to start with 1 repetition and gradually increase them.
Below we have identified the 3 most common plastic materials in our experience, describing their characteristics and the best parameters for marking them.For full reports and further insights, we recommend downloading the Guide.
This material, if not additivated, can be marked fairly well with an Infrared FiberFly laser, well with an Infrared FiberFly laser, well with a FlyAIR Green Wave green light laser and perfectly with a UV FlyUV laser. The latter provides a Photochemical reaction of the material, achieving a high, constant and absolutely indelible contrast, leaving the surface smooth to the touch.