Ever wondered how to achieve airtight, sift-proof closures for multi-wall sacks? This video demonstrates the complete working process of our Multifunctional Heavy Duty Bag Closing Machine. You'll see a high-speed sewing and heat-sealing system in action, closing paper or polypropylene bags with inner PE liners. Watch as it seamlessly stitches the bag mouth and immediately applies hot-melt adhesive tape over the seam for superior protection.