Method of false twist texturing and a false twist texturing mach

Details Method of false twist texturing and a false twist texturing mach Method of false twist texturing and a false twist texturing mach

1994-08-10

1995-04-11

Stodola, Daniel P.

Textiles: spinning, twisting, and twining

Apparatus and processes

Twist setting

57284, 57336, 57351, D01H 746, D01H 142

Patent

active

054047064

ABSTRACT:
Method and apparatus for high speed false twist texturing of yarns, which makes it possible to perform false twist texturing smoothly at a yarn speed of 1,000 m/min or higher. The number of false-twists inserted per meter of yarn is determined by Equation 1, while the yarn is false-twisted at a yarn speed satisfying Equation 2 and at a short yarn path length satisfying Equation 3: ##EQU1## wherein T is the number of false-twists inserted per meter of yarn, V is the yarn speed of false twist texturing (m/sec), L is the yarn path length from teed rollers to a false twister (m), and A is a cross sectional area of the yarn (m.sup.2), which is obtained by dividing the denier of the yarn by the density of the yarn. The false-twist texturing apparatus includes feed rollers feeding yarn to a false-twisting zone, a heating device bringing the yarn into direct contact with steam, a cooling device bringing the yarn into direct contact with water, a false twister and delivery rollers, in this order.

REFERENCES:
patent: 4138840 (1979-02-01), Greenway et al.
patent: 4173861 (1979-11-01), Norris et al.
patent: 4398386 (1983-08-01), Endo et al.

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