Polyester made in a thermoplastic form is used for food containers and wraps; and in a thermoset form used for bathroom fixtures and counters, and microwave cookware. In the thermoset form, various fillers are added. One filler added is fiberglass for making bath fixtures. It is rigid and durable. In cookware it resists heat up to 400 F.

This article was written by Anne Field, Extension Specialist, Emeritus, with references from Ohio Extension bulletins Choosing and Using Microwave Utensils and Accessories and other Plastics handouts.



MSU 2003