In a Vertical Form Fill Seal (VFFS) machine, maintaining proper film alignment and tension is key to ensuring smooth operation and consistent package quality. Poor tracking can cause wrinkles, uneven seals, or wasted material. At Unified Flex, our VFFS systems use servo-controlled pulling belts to keep a steady film feed and precise tracking through the forming collar. Some models also include pneumatic film locking, which helps stabilize film rolls during production for improved accuracy. Together, these features help achieve clean seals and uniform bag formation across production runs
