Tribological study of kinetic friction coefficient of high-tenacity PA6 multifilaments against ceramics and metals using a custom-developed frictiometer

This research focuses on the tribological behavior of high-tenacity polyamide 6 (HTPA6) multifilaments when interacting with ceramic and coated metal parts, employing a custom-designed apparatus created for this study. The variables analyzed included yarn count, the types of ceramic and metallic materials, and the testing speed, whereas other conditions such as initial tension, length of the tested section, repetitions, temperature, and humidity were kept constant. It was observed that both the yarn count and the number of filaments affect the contact surface and pressure, resulting in a reduction in the coefficient of friction with multifilaments with higher counts and number of filaments. In contrast, increased processing speeds result in a higher friction coefficient. Furthermore, the finish of the ceramic surfaces and the lubrication of the yarns are essential factors in lowering the friction coefficient.