Polymer composites (PCs) occupy leading positions among other structural materials in modern mechanical engineering. It is known that according to BBC Research Report Overview “Engineering Resins, Polymer Alloys and Blends: Global Markets” by April 2022, the global market of structural polymers and composites based on them will increase from $70.7 billion in 2021 to $94.0 billion by 2026. Taking into account a number of unique properties (low level of density with fairly high strength values, resistance to the action of aggressive environments, the possibility of working in friction and sealing units without and with insufficient oiling, etc.) PCs are especially often used in friction and sealing units of technological equipment [1-3]. It is known [4] that friction and sealing units make the greatest contribution to the reliability and durability of technological equipment.