Poly Bag Manufacturing Process
MANUFACTURING DESIGNS BOTTOM SEAL: These bags are cut individually from seamless tubing and are sealed at the bottom of both flat and gusset bags. This is the strongest seal available and is suggested for bags with heavy-duty uses. SIDE SEAL (SIDE WELD): These bags are made from folded polyethylene sheeting, sealed on each side. This seal (or weld) can be used on at and gusset bags and is suggested for retail uses. BAGS ON PERFORATED ROLLS: These bags are made on a continuous roll of seamless tubing perforated at specified intervals for ease in tearing the bag off the roll. The "top" opening can be above or below the perforation. This storage configuration takes minimum storage space and is routinely used for bin liners, pallet covers and very long bags. Pre-opened bags are suitable for automated bag-filling machines. BACK SEAL: For these bags, polyethylene sheeting is folded and sealed along the backside of the bag to form a tube. The bags are cut and bottom-sealed and a