Alpek is depolymerizing polyethylene terephthalate (PET) and incorporating the monomers into a product line of Octal polyester sheet, a company director for the Mexican producer said.
Because Alpek is using monomers extracted from recycled PET, the resulting Octal sheet is virtually indistinguishable from virgin material. Recycled content gives Octal another way to stand out.
Unlike other PET sheet technologies, Octal sheet does not require a pellet step, said Alejandro Sanchez, senior director, sales and marketing, North America, PET sheet, Alpek Polyester. He made his comments on the sidelines of the Plastimagen plastic trade show in Mexico.
Instead, it has only a polymerization step and a sheet calendering step, according to Alpek. It is then ready to be shipped to thermoformers. The lack of a pellet step means that Octal PET sheet has a shorter heat history, Sanchez said. That makes it easier for the material to be recycled, since the shorter heating history prevents further degradation of properties.
Sanchez noted other benefits of the material. It has better clarity and better gauge control than polyester sheets made with different technologies. Gauge control allows Octal sheets to have more uniform thickness, he said. That, in turn, allows longer cycles and more efficient operations.
About 85% of Octal's market is in the food packaging business, he said. Some material is used in medical packaging. Alpek completed the acquisition of Octal in 2022.
mrchub.com