Toray Industries, Inc.

Hiyoshi Matsuda

Kiyoshi Nakagawa

Masatoshi Mineo

Ken-ichiro Oka

Shigeo Ohno

Yasuo Takagi

A process for producing a highly oriented polyester undrawn yarn comprising melt-spinning a polyester from a spinneret, solidifying the melt-spun yarn and taking up a solidified yarn at a take-up velocity from 2,500 to 4,500 m/min, wherein the spinning length is set within a specific range in accordance with the take-up velocity, yarn denier and maximum allowable tension of the yarn.

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Mishima, Japan

Hiyoshi Matsuda