Thermoplastic hollow fiber membrane module and method of manufac

Details Thermoplastic hollow fiber membrane module and method of manufac Thermoplastic hollow fiber membrane module and method of manufac

1994-07-01

1997-12-09

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

95 54, 96 8, 96 10, 156 69, 156187, 156192, 15624412, 15624413, 15624422, 156296, 21032161, 2103218, 21032189, 21050023, 2105101, 210654, B29C 4702

Patent

active

056957025

ABSTRACT:
A hollow fiber membrane module and its method of manufacture are disclosed wherein the module is fabricated utilizing superior hollow fiber materials, namely high molecular weight (i.e. molecular weight>500,000 Daltons) polymers. In a preferred embodiment, the hollow fibers are fabricated from ultra-high molecular weight polyethylene (UPE). An array of UPE hollow fiber membranes is contacted with an extrusion of molten thermoplastic polymer at a contact temperature which is higher than the UPE membrane polymer. This high temperature application of sealing polymer does not collapse or otherwise deform the lumen of the hollow fiber, while assuring that the polymer can thus be applied with sufficiently low viscosity to provide adequate penetration around the individual fibers of the array to form an integral seal thereabout.

REFERENCES:
patent: 4231871 (1980-11-01), Lipps et al.
patent: 4770778 (1988-09-01), Yokoyama et al.
patent: 4778601 (1988-10-01), Lopatin et al.
patent: 5284584 (1994-02-01), Huang et al.

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