Process for dry spinning spandex

Details Process for dry spinning spandex Process for dry spinning spandex

1993-04-02

1994-11-08

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26421112, D01D 504, D01F 678

Patent

active

053624327

ABSTRACT:
A process is provided for dry spinning a segmented polyurethaneurea at speeds as high as 900 meters/min. The process includes chain-extending an isocyanate-capped polyether glycol with a mixture of ethylenediamine and 1,2-diaminopropane, the 1,2-diaminopropane amounting to 8 to 17 mole % of the diamine mixture. The resultant spandex is particularly suited for use in women's hosiery.

REFERENCES:
patent: 3111368 (1963-11-01), Romano
patent: 4973647 (1990-11-01), Bretches et al.
patent: 5000899 (1991-03-01), Dreibelbis et al.
Translation of Japan 58-194,915 (Published Nov. 14, 1983).
Translation of Japan 3-279,415 (Published Dec. 10, 1991).

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