Tech Info

PROBABLE CAUSE

1. Wrong sealing face on liner for that type of container
2. Induction sealing equipment off
3. Air space too wide
4. Removing closure too soon after induction sealing
5. Too low power setting for line speed

1. Closure having too low on torque
2. Induction head not centered above container
3. Induction head not level
4. Land area having high areas or low areas
5. Land area not level
6. Product touching liner when being induction sealed
7. Part of land area contaminated with product, flame treated, or chemical treated

1. Inconsistency in required on torque
2. Land area not flat or level
3. Land area contaminated with product
4. Closure not designed to accommodate the overhang of liner
5. Liner too thick or rigid for closure to apply consistent pressure on
6. the land area
7. Closure not turning a full 360°
8. Container finish has saddle, ridges, flashing, parting line or narrow
9. land area
10. Closure is too large for neck of container
11. Closure should be designed to have raised pressure bead to cover
12. majority of land area to ensure consistent and complete seals

1. Closure not turning a full 360°
2. Check both parting lines
3. Oversize liner (overhang) interfering with uniform pressure
4. In unscrewed closure most times the overhang is in the same
5. location so leakers could be at the overhang or opposite to it.

1. Insufficient exposure time (conveyor too fast)
2. Insufficient induction field strength (low power)
3. Improper coil height
4. Insufficient hot melt adhesive
5. Hot melt off centre and squeezes up threads
6. Liner disk undersized. Plastic from container finish squeezing and
7. bonding to closure pulp backing
8. Too high on-torque application
9. Product touching liner when being induction sealed

1. Excessive exposure time (low conveyor time)
2. Excessive power setting (field strength too high)
3. Bottle jamming under induction head
4. Closure not fully torqued-on (no heat sink from containers and closure)
5. Induction sealing head alignment not parallel, centred and level to closure

1. Closure applied too lightly (very little on-torque before sealing)
2. Excessive power setting degradation of pulp backing
3. Excessive application torque and stripping of threads