abstract |
OLEFIN/VINYL ALCOHOL COPOLYMERS ARE PREPARED BY A SPECIAL PROCESS TO GIVE COPOLYMERS THAT HAVE A NARROW OLEFIN DISTRIBUTION AND WHICH ARE SUBSTANTIALLY FREE OF HOMOPOLYMER SEGMENTS. THESE NOVEL COPOLYMERS ARE THEN FORMED INTO PACKAGING MATERIALS WHICH ARE CHARACTERIZED BY HAVING GOOD THERMAL PROCESSING CHARACTERISTICS AND LOW PERMEABILITY TO OXYGEN AND WATER VAPOR. |