POLYSTYRENE LABELING METHOD Russian patent published in 2023 - IPC B41M5/40 C08L25/06 

FIELD: labeling.

SUBSTANCE: laser methods for labeling products, in particular methods for micro-labeling with high spatial resolution of products made of optically transparent plastic, and more specifically, products made of high-quality polystyrene used in the manufacture of cultural plastic, in particular Petri dishes, culture plates and vials. The creation of a method for micro-labeling of optically transparent polystyrene with high-resolution infrared laser radiation, which makes it possible to use labeled polystyrene in the field of biology and medicine when conducting immunoenzymometric assay for localization and identification of living cells in the process of their development and growth. To achieve a technical result in the method of labeling polystyrene, which consists in irradiating the surface of polystyrene with pulsed laser radiation, according to the invention, before irradiation, polystyrene is placed in a vacuum chamber, in which a layer of copper with a thickness of 50-200 nm is applied to the polystyrene by magnetron sputtering, irradiation is carried out by choosing a speed movement of the laser beam in the range from 500 mm/s to 1000 mm/s and a pulse repetition rate in the range from 500 kHz to 1000 kHz so that the distance between the centers of the pulses does not exceed the diameter of the laser beam, and after irradiation, the copper layer is chemically removed from polystyrene surface. In this case, laser radiation with a wavelength of 1064 nm and a pulse duration of 4 ns is used.

EFFECT: obtaining micro-labeling with high spatial resolution with the possibility of forming a pattern from lines with a thickness of at least 40 μm with a distance between lines of at least 50 μm while simplifying the method.

2 cl, 7 dwg