Copolymers of ethylene and acrylic acids that have been neutralized to some degree to form metal salts. The dramatic bond strength from the most commercial brand, Surlyn® from DuPont, results from an ion which shares orbits with adjacent molecules.

Freezes bagged meat or vegetables rapidly by exposing it to blast of air at approximately -40° F. To avoid cracking at sub-freezing temperatures, either a very low density metallocene or some EVA should be a component of the PE blend. Visit our IQF page for more information.