Du Pont Toray Company Limited

Tokai Senko K.k.

Mitsuhiko Tanahashi

Kazuhiko Kosuge

Takeshi Hatano

Iori Nakabayashi

Taku Konaka

Takahiro Ito

Minoru Yamada

The present invention relates to a method for producing a heat-resistant crimped yarn comprising: twisting yarn of a heat-resistant high functional fiber; twist-setting this twisted yarn by heat treatment; and untwisting this twist-set yarn, wherein a snarl value of the twist-set yarn is not more than 6.5.

Method of producing heat-resistant crimped yarn

The invention provides heat-resistant crimped yarn, of which the constituent heat-resistant high-functional fibers are prevented as much as possible from being deteriorated under heat in the process of producing the yarn. Not losing excellent properties of heat resistance and flame retardancy intrinsic to the heat-resistant high-functional fibers, the crimped yarn has a good elongation percentage in stretch, a good stretch modulus of elasticity and a good appearance, and it fluffs little and releases little dust. The heat-resistant crimped yarn comprises heat-resistant high-functional fibers, and is characterized in that it does not deteriorate under heat, and that its elongation percentage in stretch is at least 6%, its stretch modulus of elasticity is at least 40%, and its tenacity falls between 0.15 and 3.5 N/tex.

Heat-resistant crimped yarn

Growing community of inventors

Gifu, Japan

Mitsuhiko Tanahashi