About X4zol™-J Fiber

X4zol^™-J fiber, a thermoplastic polyurethane (TPU), is a relatively new elastomeric monofilament that is manufactured differently from elastane, resulting in unique qualities that provide comfort above and beyond traditional stretch fibers. X4zol^™-J fiber is produced through a process of melt extrusion, which does not require the use of solvents. The melt extrusion process is cleaner; resulting in a finer and stronger monofilament than traditional spandex, exhibiting a superior stretch.

Spandex vs. X4zol^™-J Fiber

Most spandex fibers exhibit a steeper stress/strain curve, illustrating low initial resistance to stretch, or elongation; and then a rapid increase in resistance to the point of full elongation, or breakage (see spandex weft curve in chart).

The stress/strain curve of the X4zol^™-J fiber illustrates a softer, more consistent stretch up to the point of full elongation—tracing a J-shape that translates into comfortable compression for the wearer (see X4zol^™-J weft curve in chart.)