Process for the production of bi-component yarns

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

1978-12-20

1981-12-22

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

4251315, 428373, B29F 310

Patent

active

043070540

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), Sluijter
patent: 3701619 (1972-10-01), Appeldoorn et al.
patent: 3800985 (1974-04-01), Grout et al.
patent: 3801429 (1974-04-01), Schrenk et al.
patent: 3950476 (1976-04-01), Fontija
patent: 3968307 (1976-07-01), Matsui et al.
patent: 4035441 (1977-07-01), Endo et al.
428 373;374

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