Toray Industries, Inc.

Kunihiko Ueda

Takao Sano

Shuko Arakane

Katsumi Hasegawa

Yuhei Maeda

Teruaki Saijo

Tetsuhiko Endo

Tadashi Kohara

Koji Hashimoto

Hiroshi Ohtani

Shinji Shimizu

Hiroshi Kato

Nobuyuki Kuriyama

Kanji Saito

Hiroki Furuta

Toshio Nishitani

A melt spinning pack, including a pack case, a spinneret having many spinning holes positioned at the bottom of the case, a pack cap having a polymer introducing hole at the center positioned at the top of the case, and a flow arranging plate having many flow arranging holes with restricted portions reduced in cross sectional area compared to the inlets of the holes positioned between the spinneret and the pack cap, satisfying the requirement that the contraction percentage R be 50% or less, respectively contained in the case.

Melt spinning pack and synthetic fiber manufacturing method

Heat treatment apparatus for yarn

Method and apparatus for producing polyester fiber

A system for producing a drawn yarn having a durable mechanical and thermal stability in practical use from a fiber-forming polymer by means of a single continuous process is disclosed. A yarn extruded from a spinneret is first introduced into a liquid bath for cooling and subsequently to a hot chamber filled with a pressurized steam for heat-treatment, in which the yarn is drawn against a resistance caused by the liquid bath. The vessel of the liquid bath is provided with a yarn exit path adapted to allow the passage of the yarn but inhibit the leakage of the liquid and to remove a concomitant liquid from the yarn. The hot chamber is provided with inlet and outlet paths for the yarn also adapted to allow the passage of the yarn but inhibit the leakage of the steam. The system is suitable for producing for industrial use a yarn composed of thicker individual filaments.

Method for producing thermoplastic synthetic yarn

A process and an apparatus for simultaneously drawing and false-twisting a thermoplastic synthetic yarn, in or by which an undrawn or a partially drawn yarn is drawn under a dry hot condition in a condition of the yarn being false-twisted by twist transmitted from a false-twister and immediately thereafter heat-set under a wet hot condition prior to untwisting. The apparatus includes a yarn heater, which comprises a dry heater disposed on the side of a feeding device for the undrawn or partially drawn yarn and a wet heater on the side of a false-twister along the yarn passing direction.

Process and apparatus for simultaneously drawing and false-twisting

Growing community of inventors

Otsu, Japan

Kunihiko Ueda