公开(公告)号：DE19704275A1

公开(公告)日：1998-08-06

申请号：DE19704275

申请日：1997-02-05

Applicant: BASF AG

Inventor： NIESNER NORBERT DR ,  KNOLL KONRAD DR ,  SKUPIN GABRIEL ,  BEUMELBURG CHRISTOPH

IPC: B32B27/08 ,  B65B25/00 ,  C08L53/00 ,  C08L53/02 ,  B29C47/12 ,  B65B25/06 ,  B65B31/00 ,  B65B41/00 ,  B65B61/02 ,  B65D65/40 ,  B65D81/18 ,  C08J5/18 ,  C08L25/10

Abstract: The invention relates to a transparent, stretchable film, especially for modified atmosphere food packaging, comprising at least three levels A,B,C and possibly D, wherein A is composed of a polymer P1 or a mixture of P1 and P2 and P1 is a rubber elastic block copolymer of styrene and a special softening phase of styrene and butadiene; the second layer B is made of a polymer P2 exhibiting a water vapour permeability Pw of less than 8; the third layer C is made of a polymer with an oxygen permeability Po of less than 1000; and optionally a fourth layer D made of a polymer without any limitation of permeability. The invention also relates to the use of the above-mentioned film as food packaging and to a method of packing food in particular, especially one using said film in a standard packing machine.