Woven bags, also known as snake skin bags, are a type of plastic bag used for packaging. They are typically made from various chemical plastic materials such as polyethylene and polypropylene. The color of woven bags in Shijiazhuang is usually white or light gray, odorless, and non-toxic, causing minimal harm to the human body. Despite being manufactured from various chemical plastics, they have strong environmental friendliness and high recycling efforts. Woven bags have a wide range of applications, mainly used for the packaging and assembly of various items, with extensive use in the industrial sector. They are produced by extruding and stretching polypropylene resin into flat filaments, which are then woven and made into bags. Composite plastic woven bags are made by laminating plastic woven fabric using the extrusion lamination method. They are used for packaging powdery or granular solid materials and flexible items. Composite plastic woven bags are categorized into two-in-one bags and three-in-one bags based on their main material composition.