APEX - 4J Stretch
APEX - 4J Fiber (Lubrizol X4zol™-J), a thermoplastic polyurethane (TPU), is a new elastomeric monofilament that is manufactured differently from spandex, resulting in unique qualities that provide comfort above and beyond traditional stretch fibers. APEX - 4J 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.
