The production of cloth packaging bags involves multiple processes: First, plastic granules are melted and drawn into flat filaments using an extruder, then heat-set and stretched to form high-strength fibers. Next, the fibers are woven into a fabric base using a loom, with different structures such as plain weave, bias weave, or warp knitting chosen according to requirements. Finally, the finished product is completed through cutting, sewing, and printing.
Among these processes, weaving density and coating technology are key factors affecting the bag's performance-higher density results in greater tensile strength; coating thickness and material directly determine water resistance and corrosion resistance. For example, PVC-coated cloth packaging bags can withstand temperatures ranging from -30℃ to 70℃, while uncoated products are more suitable for short-term storage in dry environments.
