How is EPS Expanded?
EPS arrives at APTCO as small beads in 2,205 lb containers. When controlled heat is applied to the beads they expand to the required density. How much and how long heat is applied determines the final density of the expanded beads. APTCO takes special care in this part of the process to try and make every bead the same density by controlling the process and minimizing variation in the process. If this is not done properly heavy boxes and light boxes will result from the same mold. APTCO knows that its customers count on every box to be capable to handle full load of three pallets of grapes, so we precisely control the weight of the box.