公开(公告)号：DE50002729D1

公开(公告)日：2003-08-07

申请号：DE50002729

申请日：2000-01-05

Applicant: UNIVERSITEIT TWENTE ENSCHEDE D

Inventor： KRAUSE BERND ,  WESSLING MATTHIAS ,  STRATHMANN HEINER

IPC: B01D67/00 ,  B01D69/08 ,  B01D71/50 ,  B01D71/68 ,  B29C44/50 ,  D01D5/247

Abstract: The invention relates to a membrane that is produced by shaping a polymer or a polymer blend into the desired shape, charging it with a gas at hyperbaric pressure prior or after shaping it, expanding the polymer charged with gas above the glass transition temperature of the polymer/gas mixture and then cooling and stabilizing the expanded structure. The inventive method is characterized in that the polymer charged with gas is expanded with 0.05 to 4.5 wt.- % of a fluid dissolving or expanding the polymer. The inventive membrane is preferably used for medical purposes.