OPP bag: Biaxially oriented polypropylene bag; substrate: polypropylene film is made by biaxially stretching process.

PE bag full name: polyethylene bag; substrate: polyethylene resin blown or cast film.

By two or more different properties of plastic film (or with aluminum foil, paper, etc.) by dry composite, extrusion composite, co-extrusion composite process together made of packaging bags. It is not a single material, but a combination of multiple materials.

Cushioning bags are used everywhere in life. Their main function is to absorb shock and vibration energy and prevent products from being damaged by collision, drop and extrusion during transportation, storage and handling.