Process for producing hollow fibers having a non-uniform wall th

Details Process for producing hollow fibers having a non-uniform wall th Process for producing hollow fibers having a non-uniform wall th

1980-07-14

1982-06-08

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling fluid pressure in direct contact with molding...

264 41, 264541, 264167, 2642091, B29C 1702

Patent

active

043339069

ABSTRACT:
Hollow fibers, particularly useful as semipermeable membranes in separatory devices such as blood dialyzers, having a non-uniform cross-sectional area along the length thereof. The fibers have recurring points of maximum outside diameter and minimum outside diameter and such points may recur on a regular basis or at random. Fiber wall thicknesses may be substantially uniform or non-uniform. Methods and apparatus for making the fibers are disclosed.

REFERENCES:
patent: 3046178 (1962-07-01), Tupper
patent: 3312766 (1967-04-01), Stevens
patent: 3400189 (1968-09-01), Nacke
patent: 3421873 (1969-01-01), Burgman et al.
patent: 3674404 (1972-07-01), Burlis et al.
patent: 3712782 (1973-01-01), Burlis
patent: 4138457 (1979-02-01), Rudd et al.

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