Method of making side by side conjugate fiber with no crimp

Abstract

Abstract PURPOSE:A crystalline polypropylene and a high-density polyethylene, both of which have specific intrinsic viscosities respectively, are melt spun into side by side conjugate fibers and drawn, thus producing fine-denier fibers by simple processes with high stable operability and increasing the efficiency. CONSTITUTION:(A) A crystalline polypropylene of 1.45-2.10 intrinsic viscosity and (B) a high-density polyethylene of 0.85-1.10 intrinsic viscosity are melt spun with a usual spinning device so as to satisfy the equation VXD>5000 (V is take-up speed m/min; D is denier of taken-up undrawn yarns) into side by side conjugate yarns. The resulting undrawn yarns are drawn at a temperature over 90 deg.C and lower than that begins to cause the fusion between fibers at 3-5 draw ratio with a usual drawing device, thus producing the objective side by side conjugate fibers. The spinning temperatures are preferably 200-350 deg.C at the side of component A and 170-300 deg.C at component B. EFFECT:The products are substantially crimp-free and not splittable. They are suitably used to make dry or wet nonwoven fabrics.

Inventors

• 👤 Takayoshi Nakajima
• 👤 Susumu Tomioka

Bibliographic Details