Teijin Limited

Katsutoshi Taniguchi

Shoji Makino

Masaaki Yanagihara

Shigeru Takahashi

Tetsuya Akamatsu

Masakazu Fujita

Yoji Kuroda

Masahiro Muramatsu

Muneaki Awata

Katsuhiko Murase

A high speed process for producing polyester filaments, in which process the formation of fluffs and the occurrence of filament breakage are very slight and a package having a good winding appearance can be stably obtained, by melt spinning polyester filaments at a taking-up speed of 3000 m/minute or more, while applying an aqueous emulsion of an oiling agent to the filaments, the oiling agent includes 50% by weight or more of a monobasic acid ester of a C.sub.10-18 aliphatic monocarboxylic acid with a C.sub.4-18 aliphatic monohydric alcohol and having an average molecular weight of 300 to 500; 1 to 15% by weight of a polyoxyalkylene glycol copolymer having an average molecular weight of 1,000 to 30,000; and 0.1 to 3% by weight of an organic siloxane compound and/or a fluoroalkyl (C.sub.3-18) group-containing compound.

High speed process for producing polyester filaments

Fabric material useful for wind-filling sporting goods

Level-dyeable mix-spun false-twisted yarn

Worsted yarn-like false-twisted yarn

Disclosed is a friction false-twisting device comprising three parallel rotatable shafts disposed at vertexes of a regular triangle and a plurality of friction discs having a yarn contacting surface made of ceramic disposed on the rotatable shafts. Each friction disc comprises a pair of parallel end surfaces, having a large distance T(mm) between the end surfaces in a range between 5 and 8 mm, a curved surface disposed at a position between said parallel end surfaces having a large radius of curvature R(mm) in a range between 5 and 8 mm and a pair of connecting surfaces formed between the end surfaces and the curved surface having a small radius of curvature r(mm) in a range between 1/6 R and 1/2 R. The surface roughness of the yarn contacting surface is formed in a range between 1.sup.s and 6.sup.s, defined by Japanese Industrial Standard. The friction discs and the shafts are arranged so that, when utilizing this false-twisting device, yarn can be false-twisted at a speed higher than 400 m/min, yarn breakages and fluffs in the textured yarn are decreased, and the yarn quality of the textured yarn is high and uniform.

Friction false-twisting device

After doffing a full size yarn package from a bobbin holder of a takeup apparatus, a fresh bobbin is mounted thereon. A supplying thread via a thread guide is then sucked into an aspirator disposed adjacent to the takeup unit. Next, a portion of the thread upstream from the aspirator is caught by a cut-out groove at a free end of the bobbin holder and a helical winding is formed from the groove to a position on the fresh bobbin where the distance from the thread guide is minimum, and an initial bunch winding is formed at this position. Thereafter, the helical winding is eliminated by forming an additional bunch winding from a part thereof while the remaining part is sucked into the aspirator. The above method is applied to a takeup unit with a bobbin holder capable of mounting a plurality of bobbins so as to simultaneously form yarn packages from continuously supplied supplying threads. The bunch winding forming operation is carried out separately and sequentially from a bobbin furthest from the free end of the bobbin holder and, after a bunch winding is formed on each of the fresh bobbins all supplying threads are simultaneously introduced into respective traverse guides and normal takeup operation of the takeup unit is commenced.

Method and device for forming a bunch winding on a fresh bobbin at the

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Matsuyama, Japan

Katsutoshi Taniguchi