Process for the continuous shrinking of yarns

Details Process for the continuous shrinking of yarns Process for the continuous shrinking of yarns

1979-05-17

1981-05-26

Mackey, Robert

Textiles: manufacturing

Thread finishing

Surface modification of running length

81491, 68DIG5, D02J 122

Patent

active

042689414

ABSTRACT:
A process for the continuous shrinking of textiles includes initially exposing the material to the effect of a hot treatment liquid prior to placing the material on a curved support, and then, to obtain complete shrinkage, allowing the same treatment medium to flow through the material, disposed loosely on the support, and thereafter drying the material and setting the material on a sieve drum under a suction draft. In this process a plurality of twisted yarn threads are shrunk in the wet state together in parallel, side-by-side relationship at temperatures of about 85.degree.-95.degree. C.; the threads are then cooled by cold water and, subsequently, are deposited without tension on a sieve drum subjected to a throughflow of a heated gas to further develop the thus-obtained shrinkage. During this heating step, the threads are initially gradually dried in a cooling temperature range of from 50.degree.-60.degree., compressed, optionally by differences in the speeds of successive sieve drums. Then shrinkage is set, by gas being drawn through the threads, which are further guided in parallel to one another at a temperature of 180.degree.-200.degree.C.

REFERENCES:
patent: 3374646 (1968-03-01), Fleissner
patent: 3728076 (1973-04-01), Fleissner
patent: 3785017 (1974-01-01), Jacob et al.
patent: 3833975 (1974-09-01), Cahnman et al.
patent: 3835490 (1974-09-01), Fleissner
patent: 3936918 (1976-02-01), List et al.
patent: 3949453 (1976-04-01), List et al.
patent: 3965511 (1976-06-01), Fleissner

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