Container bag is also known as flexible container bag, ton bag, space bag, space bag, ton bag, etc., is a kind of container unit equipment, with a crane or forklift, you can achieve unit transportation, it is suitable for the shipment of bulk powder granular materials. Container bag is a kind of flexible transportation packaging container, space bag is widely used in food, grain, medicine, chemical, mineral products and other powdery, granular, block items transportation packaging, developed countries generally use container bags as transportation, storage packaging products. Generally polypropylene or polyethylene as the main raw material, after extrusion film, cutting, drawing, and then by weaving, cutting, sewing. This kind of space package is not only conducive to improving the efficiency of loading and unloading, especially suitable for the packaging of bulk powder and granular goods, conducive to promoting the normalization and serialization of bulk goods packaging, reducing transportation costs, but also has the advantages of convenient packaging, storage and low cost. Especially suitable for mechanized operation, it is an ideal choice for storage, packaging and transportation, and can be widely used in the road, railway and sea transportation of bulk materials such as cement, fertilizer, salt, sugar, chemical raw materials, ores and so on. Therefore, in recent years, all countries in the world have widely used container bags to transport powder goods. The appearance and use of the container bag is a qualitative revolution in the way of loading powder and particle goods.