What does your plug do for you?

To avoid scratching issues associated with syntactic
foam, solid engineered polymers have been used as plug
assist materials for forming transparent polypropylene. A
new class of syntactic foam with a copolymer epoxy base
has been designed to minimize scratching and improve
clarity when forming transparent materials. The
performance of copolymer syntactic foams for forming
transparent polypropylene was evaluated and compared to
the performance of engineered solid polymer and a
traditional grade of thermoplastic syntactic foam.