Patent · US Expired

Hollow fibre membrane extrusion

US5395570A · kind A · utility

12Cited by

15References

18Claims

0Family size

Assignee

Memtec LLC · AU

Inventors

Clinton V. Kopp · Bismarck, US
Robert J. W. Streeton · Richmond, AU
Paul Soo-Hock KHOO · Parramatta, AU

Key dates

Filing date	Feb 5, 1993
Grant date	Mar 7, 1995
Priority date	—
Expiry date	Feb 5, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2201/052
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Extrusion of hollow membranes is improved by coextruding a coating fluid layer about the extrudate of heated polymer solution with its interior lumen forming extrudate. The coating fluid is disposed between the forming hollow fiber and a cooling fluid, and controls the rate of heat transfer to afford superior control over the structure and form of the hollow fiber produced in the invention. The coating fluid is typically the same material as the cooling fluid, and often is the same material as the solvent for the polymer in the heated polymer solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.