Patent · US Expired

Hemodialysis membrane and process and apparatus for using same in hemodialysis

US4354938A · kind A · utility

8Cited by

11References

12Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Axel Walch · Baldham, DE
Max Bytzek · Naurod, DE
Jurgen Wildhardt · Wallrabenstein, DE
Klaus-Dieter Hammer · Mainz, DE

Key dates

Filing date	Aug 10, 1978
Grant date	Oct 19, 1982
Priority date	—
Expiry date	Aug 10, 1998

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D67/00113
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Disclosed is a viscose membrane suitable for hemodialysis, comprising a viscose membrane substantially equally oriented in the longitudinal and in the transverse directions, having in the dry state a birefringence in each direction of not more than about 6.times.10.sup.-3 and a phase difference of not more than about 150 nm, and wherein during transition from a dry into a wet state, the membrane undergoes a shrinkage of between about 0.5 and 10 percent both in the longitudinal and in the transverse directions. The membrane is produced by a process which is characterized in that the membrane is transversely stretched by 40 to 120% prior to drying.

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