Du Pont Toray Company Limited

Fujitsu Corporation

Tokai Senko K.k.

Takeshi Hatano

Kazuhiko Kosuge

Iori Nakabayashi

Mitsuhiko Tanahashi

Takayuki Hasebe

Seigo Kotani

Ryota Akiyama

Takaoki Sasaki

Shiro Sakamoto

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

A file processing unit comprises a first signature information producing unit that produces first signature information in accordance with a predetermined rule utilizing the data of a file designated by a file close request issued in an application used in a computer system, and a signature information storage control unit that stores the first signature information, correlated with the file designated by the file close request, in a storage unit.

File processing unit

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

A dyeable polyparaphenylene terephthalamide fiber which has been wound once after spinning and has not been dyed yet, characterized in that it has a tensile strength of 15 g/denier or more and a crystal size (110 direction) of 30 to 55 angstroms and has no history of a treatment drying to have a water content of 8% or less, and a method for producing the same. A polyparaphenylene terephthalamide fiber which can be dyed while its properties of high strength and high modulus elasticity are maintained, and textile products made of the fiber which are dyed in a variety of colors, can be provided.

Polyparaphenylene terephthalamide fiber and method for producing the same

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Tokyo, Japan

Takeshi Hatano