公开(公告)号：EP1123190B1

公开(公告)日：2006-06-21

申请号：EP99949241.6

申请日：1999-10-18

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： BECKERS, Stefan, D. ,  WEIGEL, Peter ,  FINK, Hans-Peter ,  DOSZ, Michael ,  PURZ, Hans-Joachim

IPC分类号： B29C47/00 ,  B29C47/10 ,  B29C55/28 ,  B01D71/10 ,  C08B1/00 ,  C08J5/18

CPC分类号： C08J5/18 ,  B01D67/0011 ,  B01D67/0025 ,  B01D69/04 ,  B01D69/06 ,  B01D71/10 ,  B01D2325/022 ,  B29C47/0026 ,  B29C47/0057 ,  B29C47/0059 ,  B29C47/8895 ,  B29C55/00 ,  B29K2001/00 ,  B29K2995/0072 ,  C08J2301/02

摘要： A process and apparatus used in cellulose extrusion is disclosed. In particular, the process discloses using an inert gas blanket above a cellulose solution wherein the inert gas blanket reduces any undesirable colour variations in the extruded product. Furthermore, the apparatus discloses draw means positioned downstream of the extrusion means to continuously draw the extruded cellulose film from the extrusion means. Apparatus is also disclosed wherein a tubular member is used to receive an extruded blown tube. The product formed using the process and apparatus described herein which has a substantially uniform distribution of fine pores throughout its cross-section is also discussed.