Incorporation of the antioxidant in the bulk of the
polymeric matrix by extrusion technologies
The incorporation and mixing of the agent with the
melted polymer during the extrusion process has also
been explored and it is currently used in the manufacture
of active packages. This technique is preferred by many
converters since most conventional packaging structures
are manufactured completely or partially by extrusion processes.
The critical issue to be considered is whether the
active substance is degraded by severe thermo-mechanical
treatment.