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Aramid-Nylon (AR-NY) Hybrids:
The mechanical and thermal properties of Aramid and Nylon fibres highly differ from each other. The cord mechanical properties can be engineered within the area between Aramid and Nylon by changing the cord forming properties such as
dtex, twist, etc. Consequently it is possible to have cord mechanical properties varying between Aramid and Nylon properties.

AR-NY hybrids offer improved fatigue resistance compared to Aramid only cords. Increasing Nylon 6.6 content in the hybrid structure positively affects the fatigue resistance of the hybrid cord (Hybrid B, C and F, G). Increasing the Aramid cord twist level also positively affects the fatigue performance of the hybrid. In order to have improved fatigue performance of hybrid cords, Aramid and Nylon's single
and cable twist levels must be optimized. Usually a low twist level of Aramid gives higher breaking strength and lower elongations but shows low fatigue performance. Retained adhesion of hybrid cords after fatigue tests (dynamic adhesion) is also acceptable and at similar levels compared to single material cords.