St. Petersburg Mining University, St. Petersburg, Russia:

E. I. Pryakhin, Dr. Eng., Prof., Head of the Dept. of Materials Science and Technology of Art Products, e-mail: e.p.mazernbc@yandex.ru
E. Yu. Troshina, Postgraduate Student, Dept. of Materials Science and Technology of Art Products, e-mail: ivan.grey.90@mail.ru

In industrial enterprises, imported acrylic-based polymer films are usually used for laser marking of equipment and machinery with surfaces made of ferrous and non-ferrous alloys. Since these films are marked and engraved with lasers, they are called laser films in the market environment and in production. Laser films play the role of flexible nameplates: they are marked and pasted on products and products in the form of labels. But acrylic foreign films have a limited operating temperature and cannot be used on products and workpieces experiencing heating above 300 °C. Due to Western sanctions, their import into Russia is limited. The new Russian composite film of the LP series based on organosilicon compounds acts as a domestic alternative to foreign analogues, and also surpasses their temperature resistance characteristics. An important characteristic of the laser film is not only temperature resistance, but also the possibility of obtaining high-quality contrast markings with high resolution, since modern markings include not only alphanumeric information, but also dense two-matrix barcodes. In this regard, in this paper, a comparative study of the laser sensitivity of the German acrylic film tesa 6930 and the Russian organosilicon film of the LP series is carried out. Technological modes of marking are determined. The high temperature resistance of the LP series film is also demonstrated at different temperature ranges from 300 to 1000 °C. Laser exposure to the film is carried out on a pulsed nanosecond system common among manufacturing companies with an infrared radiation wavelength of 1,064 microns and an average output power of 20 watts. The film is fixed on the surface of steel grade 0,1C18Cr9Ni, imitating products. The samples are tested for temperature resistance in a chamber-type thermal furnace.

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