Open or uneven seals and scorched film can increase packaging waste. Causes may involve the film, equipment, settings or product positioning, so record each symptom separately.
Initial inspection
Check sealing jaws for cleanliness and wear in accordance with equipment safety instructions. Look for film-feed wrinkles, product contact in the sealing area and incorrect roll positioning.
Change one variable at a time
Within machine and film supplier recommendations, change only one of temperature, contact time or pressure. After cooling, inspect seal integrity and record adjustments, line speed and waste. Consult the equipment and film suppliers if the problem persists.