If not used in food containers, the inner layer can also use recycled materials to save costs. Zero pollution process conforming to ISO14001-1996 standard. The hollow molding process is similar to PP panel and can be directly produced.

The basic conditions for manufacturing PP three-layer foam board with good structure. The advantage of recycling is that the inner layer (in contact with food) is suitable for FDA food grade PP materials, the middle layer uses recycled materials for foam, and the outer layer uses printable PP materials. This can save costs.