公开(公告)号：EP0886576A1

公开(公告)日：1998-12-30

申请号：EP96925362

申请日：1996-07-18

申请人： MINNESOTA MINING & MFG

发明人： CARTER BRANDT K ,  LUCKING RAYMOND L ,  KLEIN JAMES A ,  ISRAEL SHELDON J

IPC分类号： B29C55/02 ,  B29K67/00 ,  B29L9/00 ,  B32B27/36 ,  B29C71/02 ,  B32B31/26

CPC分类号： B32B27/08 ,  B29C55/023 ,  B29K2067/00 ,  B32B27/36 ,  B32B2038/0028 ,  B32B2307/52 ,  B32B2367/00

摘要： A multilayer polyester film, and a method for making the same, is provided. The film consists of alternating layers of polyethylene terephthalate and polyethylene naphthalate. Biaxial orientation and subsequent restrained heat setting of these materials results in thin films with tensile moduli in both stretch directions well in excess of the values obtained with monolithic films of either material. In some embodiments, a slippery surface is imparted to the film without the use of conventional slip agents.