Toray Industries, Inc.

Mototada Fukuhara

Takashi Ochi

Takeshi Kikutani

Akira Kishiro

Atsushi Taniguchi

Ken-ichi Morita

Masaru Suzuki

Kenji Tsunashima

Keizo Ono

Shigeru Fujii

Katsumasa Osaki

A process for preparing highly oriented undrawn core-sheath type conjugated polyester fibers including the step of spinning a polyester as the sheath polymer and a polymer having a larger gradient of elongational viscosity with the temperature than that of the sheath polymer as a core polymer at a spinning speed of about 4000 to 12000 m/min.

Process for producing highly oriented undrawn polyester fibers

A highly oriented undrawn polyester fiber which is crystalline such that the fiber is capable of exhibiting a diffraction peak observable in a wide angle X-ray diffraction image of the fiber and has a birefringence of 0.015 to 0.05. A process for preparing highly oriented undrawn core-sheath type conjugated polyester fibers including the step of spinning a polyester as the sheath polymer and a polymer having the larger gradient of elongational viscosity with the temperature than that of the sheath polymer at a spinning speed of about 4000 to 12000 m/min. A textured yarn made of said highly oriented undrawn polyester fibers and a process for preparing the textured yarn.

Highly oriented undrawn polyester fibers and process for producing the

Heat-sensitive mimeograph stencil

An improved electric resistance heating element made of a carbon material, provided around its surface with a layer essentially comprising carbon fiber, and an improved electric resistance heating furnace using the heating element.

Electric resistance heating element and electric resistance heating

A process for producing a carbon fabric wherein a fabric, which is made of an acrylonitrile polymer fiber having a fusing temperature (T.sub.f) of at least 310.degree. C. and exhibits a free areal shrinkage of not larger than 50%, is heated in an active gas atmosphere under conditions such that shrinkage of the fabric is permitted, thereby to be stablized, and then, the fabric is carbonized in an inactive gas atmosphere.

Process for producing carbon fabric

Growing community of inventors

Shizuoka, Japan

Mototada Fukuhara