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FAQs & Troubleshooting

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Common Solutions, Tips, and Recommndations

PROBABLE CAUSES:
Too low power setting for line speed
Removing closure too soon after induction sealing
Air space too wide
Induction sealing equipment off
Wrong sealing face on liner for that type of container
‘On-Torque’ from capper too low setting
PROBABLE CAUSES:
Closure having too low on torque
Induction sealing head alignment not parallel, centered and level to closure
Land area not level
Product touching liner when being induction sealed
Part of land area contaminated with product, flame treated or chemical treated
PROBABLE CAUSES:
Liner too thick or rigid for closure to apply consistent pressure on the land area
Closure not turning a full 360°
Container finish has saddle, ridges, flashing, parting line or narrow land area
Closure is too large for neck of container
Closure should be designed to have raised pressure bead to cover majority of land area to ensure consistent and complete seals
Land area not level
Part of land area contaminated with product, flame treated or chemical treated
Inconsistency in required on torque
Closure not designed to accommodate the overhang of liner
PROBABLE CAUSES:
Oversize liner (overhang) interfering with uniform pressure
In unscrewed closure most times the overhang is in the same location so leakers could be at the overhang or opposite to it
Closure not turning a full 360°
Check both parting lines
PROBABLE CAUSES:
Excessive exposure time (low conveyor speed)
Too high power setting on induction equipment
Too high on-torque
Closure and container threads not properly matched
Tri-Tabs sticking to side wall and threads of closure
Liner’s overhang is sticking to side wall and threads of closure
With excessive power, the primary liner will stick to the PE secondary liner on the outside edges
PROBABLE CAUSES:
Product touching liner when being induction sealed
Too high on-torque
Insufficient exposure time (conveyor too fast)
Insufficient induction field strength (low power)
Improper coil height
Insufficient hot melt adhesive
Hot melt off center and squeezes up threads
Liner disk undersized. Plastic from container finish squeezing and bonding to closure pulp backing
PROBABLE CAUSES:
Excessive application torque and stripping of threads
Excessive power setting degradation of pulp backing
Closure applied too lightly (very little on-torque before sealing)
PROBABLE CAUSES:
Induction sealing head alignment not parallel, centered and level to closure
Excessive exposure time (low conveyor time)
Excessive power setting (field strength too high)
Bottle jamming under induction head
Closure not fully torqued-on (no heat sink from containers and closure)
PROBABLE CAUSES:
Part of land area contaminated with product, flame treated or chemical treated
Wrong material for application
Excessive exposure time (low conveyor speed)
Too high power setting on induction equipment
PROBABLE CAUSES:
Melt point conflict between backing and closure
Incorrect backing for application
Excessive power setting (field strength too high)
PROBABLE CAUSES:
Excessive exposure time (low conveyor speed)
Part of land area contaminated with product, flame treated or chemical treated
Excessive power setting (field strength too high)
PROBABLE CAUSES:
Wax not completely absorbed into pulpboard
Retorquing too soon after induction sealing

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