The Heat is On

Retort pouches are made up of multiple layers. “Traditionally, this has been between three and five, however some companies now are pushing to reduce costs by asking that desired objectives be met with two layers,” reports Hass. Various materials that make up these layers include PET, foil, nylon, polypropylene, and specialty materials such as aluminum oxide, silica oxide, polyacrylic acid, or nanocomposite coated films.