The packing speed and bag-making length can be adjusted stepless in an extra range.

According to the raw materials, the valve pocket can be divided into: PP valve pocket, PE valve pocket, paper and plastic compound valve pocket, kraft paper valve pocket and multi-layer kraft paper valve pocket. PP valve pocket is made of polypropylene woven cloth upper valve port or lower valve port, than the general PP woven bag can improve the packaging power; PE valve pocket is made of polyethylene woven cloth valve port; Paper-plastic compound valve pocket is a plastic woven bag (cloth) as the base material, the flow method is made of composite (cloth/film composite for two in one, cloth/film/paper composite for three in one); The raw material of kraft paper valve pocket is mainly kraft paper, which is divided into imported kraft paper and domestic kraft paper. According to the opening, the valve pocket can be divided into: the upper opening valve pocket, the lower opening valve pocket, the upper and lower opening valve pocket. The use of valve pocket valve pocket is mainly used for packaging food powder, chemical powder, fertilizer, synthetic materials, explosives, food, salt, minerals and other powder or granular solid materials and flexible items. Especially suitable for export enterprises to use, can improve the packaging grade of products. With the rapid development of China's economy, the purchasing power level of domestic residents will gradually increase their willingness to slow consumption, and the consumption concept will tend to further improve the quality of life. The market demand for liquid food such as beverage, wine, edible oil and condiments will also grow steadily with the development of economy and the improvement of people's living standards.