公开(公告)号：DE69613609T2

公开(公告)日：2002-05-08

申请号：DE69613609

申请日：1996-03-01

Applicant: TORAY INDUSTRIES

Inventor： OCHI TAKASHI ,  KISHIRO AKIRA ,  FUKUHARA MOTOTADA ,  TANIGUCHI ATSUSHI ,  KIKUTANI TAKESHI

IPC: D01F8/14

Abstract: Highly oriented undrawn polyester fibers show a diffraction peak, due to crystals of the polyester, observable in a wide angle x-ray diffraction image of the fibers and having a birefringence of 0.015 to 0.05. A process for preparing highly oriented undrawn core-sheath type conjugated polyester fibers which may have such diffraction and birefringence properties comprises the step of spinning a polyester as the sheath polymer and a polymer having a gradient of elongational viscosity with temperature larger than that of the sheath polymer, at a spinning speed of 4000 to 12000 m/min. The fibers may be falsetwisted to obtain a textured yarn.

公开(公告)号：DE69613609D1

公开(公告)日：2001-08-09

申请号：DE69613609

申请日：1996-03-01

Applicant: TORAY INDUSTRIES

Inventor： OCHI TAKASHI ,  KISHIRO AKIRA ,  FUKUHARA MOTOTADA ,  TANIGUCHI ATSUSHI ,  KIKUTANI TAKESHI

IPC: D01F8/14

Abstract: Highly oriented undrawn polyester fibers show a diffraction peak, due to crystals of the polyester, observable in a wide angle x-ray diffraction image of the fibers and having a birefringence of 0.015 to 0.05. A process for preparing highly oriented undrawn core-sheath type conjugated polyester fibers which may have such diffraction and birefringence properties comprises the step of spinning a polyester as the sheath polymer and a polymer having a gradient of elongational viscosity with temperature larger than that of the sheath polymer, at a spinning speed of 4000 to 12000 m/min. The fibers may be falsetwisted to obtain a textured yarn.