The square bottom valve bag was born in the idea of convenient freight transportation and has a history of 100 years. It can be closed by itself at the valve bag after filling material, and the appearance is brick-shaped. Shows the unparalleled advantages of other bags in the transportation of goods. For example, it can realize bag picking by manipulator, automatic quantitative canning, self-closing valve bag, automatic palletizing, saving storage space, square appearance, clear sign, and improving the working environment of canning, especially for powder products, which greatly improves the working environment. The advantages.
The materials for making square bottom valve bags first started from paper, then developed to paper-plastic composite bags, and then to film-coated plastic woven bags. The evolution of these materials is a product derived from the market environment and market demand.
The square bottom valve bag is especially suitable for filling powder and granular products. Its valve bag technology includes: inner valve bag, outer valve bag, and extended valve bag, and the customization is flexible and changeable; it also solves the storage problem for many years, making the Its stacking is higher, which saves more storage space, and is beautiful and tidy.
Plastic woven square bottom valve bag performance
Plastic woven square bottom valve bag can effectively improve the quality of cement, it has anti-drop, anti-leakage, moisture-proof and other properties. With the continuous deepening of the industrial automation process of cement enterprises and the further emphasis on the quality of cement packaging bags, the quality and performance requirements of plastic-woven square bottom valve bag cement bags are getting higher and higher, mainly in: mechanical properties, that is, strong Strong, anti-dropping, and able to handle long-distance transportation. Such as moisture resistance and good sealing performance, ensure that the product will not be damp during storage and transportation, the product will not leak, and will not cause cement loss.
In terms of automation function, it can be filled efficiently, quickly and accurately. At present, the all-plastic square bottom valve bag has been widely used in cement enterprises at home and abroad. It is characterized by fast filling, neat and beautiful appearance, good sealing performance, exquisite printing, large packaging volume, and stand-up packaging, which is very suitable for stacking. transport operations. With the automatic filling of the packaging machine, the valve port on the top can achieve the effect of automatic sealing after the cement is filled, saving time and effort.
Advantages of plastic woven square bottom valve bags
The plastic woven square bottom valve bag is produced by a special square bottom valve bag making machine. It is produced by heat sealing, using pp woven bag tube with lamination, and is a low-cost square bottom valve bag suitable for automatic packaging processed by heat sealing production process. The upper and lower sealing of this square bottom valve bag does not require any sewing. Wire. Instead, a stable heat-sealing is performed with the coating layer of the woven cloth. The film on the bottom of the bag, as well as the film on the valve flap and back cover, are softened by hot air and then heat sealed together by pressure. The square bottom valve bag production line changes the four separate production and processing processes of cutting, printing, valve opening, and sewing, improves production efficiency and product quality, and saves a lot of manpower and materials.
No sewing is required in the production process, which not only reduces the production process, but also saves the sewing thread and the kraft paper seam. Fundamentally avoid the seam head and paper edge entering the cement concrete, ensure the construction quality, and keep the site environment clean. It is beneficial to the recycling and utilization of packaging bags after use and the requirements of protecting the ecological environment.
Using the latest punching method and micro-hole punching technology, the hole diameter is small, and the density of the hole is relatively large. The hole diameter and density can be adjusted according to the canned exhaust conditions to reduce the problem of excessive loss of bag body strength caused by punching. . In the filling and transportation process, the phenomenon of ash spraying and ash leakage is greatly reduced, the filling site and the loading and transportation environment are improved, the loss and waste of cement are reduced, and the development requirements of energy saving and environmental protection are met. The square bottom valve bag packs cement, making the filled bag square, improving the stacking shape, which can improve the level of product packaging, good appearance and quality, and is conducive to expanding the market influence of my country’s cement products.
In fact, the most important thing is that the plastic-woven square bottom valve bag can help cement enterprises to realize that the cement filling, stacking, storage, loading and transportation processes are all automated mechanical operations, which can reduce a lot of human resources and save costs.