Method for making multi-filament yarn

Details Method for making multi-filament yarn Method for making multi-filament yarn

1986-08-29

1988-09-27

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

2642102, 2642105, 2642106, 2642107, 2642108, 26421114, 26421117, 26421122, 2642896, 2642905, D01D 516

Patent

active

047740426

ABSTRACT:
A method is disclosed for melt spinning man-made filaments, and wherein the filaments are formed into yarn components which are subsequently combined to form a composite yarn. The method and apparatus include provision for selectively modifying the physical properties of the yarn components, so that the physical properties may be either the same or different from each other in the resulting composite yarn. In the illustrated embodiments, a polymer is extruded through a spinneret to form a plurality of separate groups of advancing filaments, and the physical properties of at least one of the groups is modified in relation to the physical properties of the other groups. The modification of the physical properties may be effected by drawing each of the groups so that all of the groups are subjected to the same total draw ratio, but with the drawing process being conducted in sequential steps which are different between at least two groups of filaments. The modification of the physical properties may also be effected by different heat treatments of the advancing groups of filaments in conjunction with the drawing step. Where different shrinkage properties are imparted to the yarn components, the resulting composite yarn may be subjected to a heat treatment, which serves to texturize the yarn by the shrinkage of the components having the greater shrinkage tendency.

REFERENCES:
patent: 3039171 (1962-06-01), Hume et al.
patent: 3199281 (1965-08-01), Maerov et al.
patent: 3423809 (1969-01-01), Schmitt
patent: 3705225 (1972-12-01), Taylor
patent: 4185064 (1980-01-01), Schippers

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