公开(公告)号：EP1525080A1

公开(公告)日：2005-04-27

申请号：EP03784042.8

申请日：2003-07-23

申请人： Alcan Deutschland Holdings GmbH & Co. KG

发明人： SCHUBERT, Günter ,  GRAFMÜLLER, Uli ,  BOIRON, Guy

IPC分类号： B29C33/68 ,  B29C37/00 ,  B29C70/50 ,  B32B27/18 ,  B32B31/30 ,  B32B27/20 ,  B65D65/40 ,  B32B27/10 ,  D03D27/00

CPC分类号： B32B27/08 ,  B29C33/68 ,  B29C37/0075 ,  B29C70/504 ,  B32B27/10 ,  B32B27/18 ,  B32B27/20 ,  B32B37/153 ,  Y10T428/31725 ,  Y10T428/31786

摘要： The invention relates to a sealing film comprising a substrate (2), a primer layer (3), and at least one extruded functional layer (6). The aim of the invention is to improve one such sealing film in terms of the migration freedom of constituents thereof. To this end, an extruded barrier layer (4) preventing at least the migration of constituents of the primer layer (3) and/or the functional layer (6) is provided between the primer layer (3) and the extruded functional layer (6).