The influence of stretching ratio

The stretching process of primary fibers is to destroy the original structural morphology of primary fibers and generate new ordered structures. Under the action of tensile stress and thermal effects, the activity of macromolecular chain segments increases, various structural units slide along the fiber axis and aggregate, rearranging and adding new binding points, putting more molecular chains in a particularly good stress bearing state, and producing three-dimensional structural regularity (i.e. crystallization). The fiber density increases with the increase of stretching ratio.

As the stretching ratio increases, the strength of the fiber increases, and the stretching ratio contributes significantly to the strength of the fiber.