Device for the production of bi-component yarns

Details Device for the production of bi-component yarns Device for the production of bi-component yarns

1979-05-29

1981-12-29

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

4253822, 425463, D01D 300

Patent

active

043080049

ABSTRACT:
The present invention relates to a process and a device for the production of bi-component yarns containing bilaminar and multilaminar filaments.
Two polymer compositions are spun after feeding through a dichotomic mixer possessing tubes of identical internal diameter (5 to 25 mm), inside which 4 to 9 helical elements are placed in series, the leading edge of each of the elements being placed at 90.degree. relative to the trailing edge of the previous element. The process and device according to the invention can be used for all types of spinning, namely solution spinning, melt spinning, semi-melt spinning and the like. The yarns obtained contain only a minor proportion of monolaminar filaments.

REFERENCES:
patent: 3420267 (1969-01-01), Veazey
patent: 3559237 (1971-02-01), Biggelaar et al.
patent: 3577308 (1971-05-01), Drunen et al.
patent: 3608148 (1971-09-01), Sluiters
patent: 3641232 (1972-02-01), Fontijn et al.
patent: 3672802 (1972-06-01), Matsui et al.
patent: 3700545 (1972-10-01), Matsui et al.
patent: 3701619 (1972-10-01), Aurledoorn et al.
patent: 3800985 (1974-04-01), Grout et al.
patent: 3950476 (1976-04-01), Fontijn
patent: 3968307 (1976-07-01), Matsui et al.
patent: 4035441 (1977-07-01), Endo et al.

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