Process for making hollow fibers

Details Process for making hollow fibers Process for making hollow fibers

1975-05-06

1977-11-01

Lowe, James B.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156229, 156269, 264159, 264173, 264DIG47, B32B 3108, B32B 3118, B29D 724, D01D 524

Patent

active

040564185

ABSTRACT:
Process and apparatus for the manufacture of hollow fibers are disclosed in which at least two layers of molecularly orientable thermoplastic material are together passed through a pressure nip between two rollers, each of which has in its periphery annular grooves with lands therebetween, the grooves in the respective rollers being accurately aligned, whereby the layers are caused to form at least the boundaries of enlarged portions which are connected by thin integral portions or completely severed from each other. Any interconnected enlarged portions are then separated by mechanical means.

REFERENCES:
patent: 1349560 (1920-08-01), Cobb
patent: 3158181 (1964-11-01), Gore
patent: 3273771 (1966-09-01), Beaumont
patent: 3470685 (1969-10-01), Hall et al.
patent: 3494522 (1970-02-01), Kim et al.
patent: 3530029 (1970-09-01), Lemelson
patent: 3574804 (1971-04-01), Joonase
patent: 3919377 (1975-11-01), Dow et al.

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