Polypropylene foam.

摘要

Foamed polypropylene sheets and articles thermoformed therefrom are suitable for microwaving and are produced by providing a polypropylene composition exhibiting uniform melt draw properties, heating the composition, injecting a blowing agent, preferably carbon dioxide or a carbon dioxide hydrocarbon blend, and extruding the blend into a sheet which may then be thermoformed into articles such as trays.