Polyolefin Packing Materials Shi-Long polyolefin packing products include PE thermal shrinkable films or tubing，and PP, OPP, POF or CPP membranes and bags. With a complete variety of the products with outstanding performance, they are widely used in industries of refrigerators, power supply, hardware, electron equipment, decoration, food, beverages and pharmaceuticals, and have been exported to Europe, U.S.A., South East Asia and other regions.