An experimental investigation on the laser cure of thermosetting powder: An empirical model for the local coating

作者：Simone Giuseppina^*

来源：Progress in Organic Coatings, 2010, 68(4): 340-346.

DOI：10.1016/j.porgcoat.2010.02.010

• Laser curing
• Adhesion
• Process map

We report an in-depth experimental study to evaluate a process for achieving a local coating of thermosetting powder on metallic substrate. Laser cure is a fast and smart process for achieving local, bound, and fixed coating.
Moreover, the wastage of raw materials is reduced, thus providing a significant impact on the environment.
As part of the analysis of the adhesion of polymer coating, the influence of the output power from the source, the focal length, and the scan speed have been investigated. The extreme limits of the parameters have been defined through a preliminary study to furnish the conditions that yield either an uncured or degraded coating.
The extent of polymerization was investigated using thermal analysis.
In the range analyzed, both the adhesion and the curing of the polymer were found to correspond with the same operative conditions. Therefore, we have been able to optimize the adhesion index to guarantee a high performance of the process.
On the basis of the experimental findings, an empirical model has been proposed and a map of the process has been built up. The 3D map constitutes a practical tool for technicians in industrial applications, and for scientists, it contributes to an understanding of the influence of the various parameters on the process.

• 出版日期2010-8