Thermoforming panel discusses material innovation


Clear, thermoformed food packaging used to be mainly polystyrene and PET, but newer materials -- barrier layer plastics, polypropylene and bioresins such as polylactic acid -- make it more complex, according to panel members at the Society of Plastics Engineers’ Thermoforming Conference.

“When you’re processing all five different clear materials, it can be a real challenge to keep them separately,” said Rick Esser, who is in charge of thermoforming at Plastic Ingenuity Inc. of Cross Plains, Wis. “We spend a lot of time separating the materials from the beginning.”

Esser said Plastic Ingenuity also carefully cleans grinders and tubing for material handling....
Read more