Widely used in the packaging field, as flower wrapping, gift packing, stationery, and for flexible packaging like the lamination film used in extrusion coating or dry lamination. Or, with vacuum metallization to replace the aluminum foil for flexible packaging purposes or as decoration flim with full color print. Three layer structure as A/B/C to save the cost for those high value polymers on the sealing or lamination layer (top and bottom) and at the same time, using the low cost materials as well as the trimmed edge and waste as the middle layer.