Title: Knitted or woven ion exchange fabric containing low denier filaments

Abstract: A woven or knitted fabric to be employed for ion exchange purposes comprises filaments of a fluorinated polymer with sulfonyl containing pendant side chains either in ionic or nonionic form whereby the filaments are supported by higher strength material prior to a weaving or knitting operation. Thereafter the supporting material is desirably removed. The final fabric may be woven so that the fabric is essentially impermeable to passage of fluids through fiber interstices or in an alternate manner is woven or knitted to allow controlled passage of liquid through fiber interstices. The polymer employed in the fabric possesses permselectivity giving desirable performance in electrolytic as well as membrane ion exchange and reverse osmosis devices.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Grot, Walther Gustav (Chadds Ford, PA, US)

Application Number: 483570
Filing Date: 1974-06-27
Publication_date: 1976-03-02
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Class(es): 57/238 521/27, 521/31, 521/33
Other Classes:
US Patent Ref:

2716049	Aug, 1955	Latour	28/76.
3179618	Apr, 1965	Roberts	264/184.
3282875	Nov, 1966	Connolly et al.	260/79.
3344596	Oct, 1967	Spicer et al.	57/140.
3350488	Oct, 1967	Breen	57/140.
3784399	Jan, 1974	Grot	260/79.

Other Refs:
Primary Examiner: Watkins, Donald E.
Assistant Examiner:
Attorney: