Process for producing foam fiber

Details Process for producing foam fiber Process for producing foam fiber

1990-03-07

1992-06-23

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264165, 521 79, 521 81, 521 92, 521 97, 521138, 521182, B28B 1118, C08J 908

Patent

active

051240980

ABSTRACT:
There is described a process for producing polyester foam fiber where sodium carbonate and citric acid are added as blowing agent before spinning together with polycarbonate. The proportion of blowing agent is from 0.15 to 0.80 percent by weight of the polyester and the proportion of polycarbonate is from 0.5 to 2 percent by weight of the polyester. The process of the invention makes it possible to produce foam fiber, i.e. filament or staple fiber with discontinuous voids, which may be used for example as carpet fiber and filling fiber for blankets and cushions or as a lining material for winter clothing.

REFERENCES:
patent: 3884030 (1975-05-01), Baxter et al.
patent: 4164603 (1979-08-01), Siggel et al.
patent: 4425443 (1984-01-01), Georlette et al.
patent: 4544594 (1985-10-01), Li et al.
patent: 4572740 (1986-02-01), Kretzschmann et al.
patent: 4588754 (1986-05-01), Liu

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