The filling and unloading of container bags are carried out through the top and bottom loading ports and the bottom loading port, and the sealing can be completed. In addition to closed container bags, open container bags are more convenient for filling, but they cannot be sealed and need to be stacked more carefully. To unload the container bag, lift the container bag and open the discharge port at the bottom. Because of the woven bag characteristics of container bags, empty bags can be folded for storage. Compared with containers and pallets, they take up less space and are convenient for storage.
What should you pay attention to when transporting container bags? Do not stand under the container bag during hoisting operations. The hanging hook should be hung on the sling or rope. Do not hang the container bag diagonally, single-sided, or diagonally. Do not conflict with other items, hook or bump the container bag during operation. Do not pull the sling outward in the opposite direction. When using a forklift to operate a container bag, please do not allow the fork to contact or penetrate the bag body to avoid puncturing the container bag. When moving in the workshop, try to use pallets and avoid using slings to hook the container bags and move them while shaking. Keep the FIBC upright during loading, unloading, and stacking. Do not hold the FIBC upright and do not drag the FIBC on the ground or concrete. When it is necessary to store the container outdoors, the container bag should be placed on the shelf, and the container bag must be tightly covered with opaque shed cloth. After use, wrap the container bag in paper or opaque shed cloth and store it in a ventilated place.
Container bags are different from ordinary plastic woven bags because their carrying capacity is much larger than ordinary packaging, so the stitching of each part of the container bag is also very important, not as simple as ordinary plastic bags. Heat sealing is enough, but it needs to be combined with other components through multiple processes. This policy is a critical policy for container bags. In the plastic braiding specification GB/T8946 and the composite plastics GB/T8947 national specification, the tensile load in the seam edge direction and the seam bottom direction are clarified. The main factors that affect the stitching strength are the type and type of suture, stitch size, stitches, standard of hemming or hemming suture to bag edge, hot and cold cutting methods, etc.
Generally speaking, internal control policies should be developed for these influencing factors. For container bags, national standards stipulate that the tensile strength of the main connection part must reach more than 67% of the basic strength, and the tensile strength of the bottom connection part must reach more than 42% of the basic strength. Regarding the top seal of the spout cement bag, it is recommended to treat it as the bottom seam strength. Regarding the bottom seam strength of the paper bag, it usually cannot meet the policy, so it is recommended to change it to a bottom bag. For laminated cold-cut bags, it is recommended to use curling processing, because the sutures on the cold-cut edges may be torn out from the warp and weft. For woven bags that do not require strength, the upper edge of the bag can be overlocked, the stitch length can be dense, and the thread can be thin.