Induction sealing is a non-contact heating process that welds a foil laminate (called an inner-seal) to the lip of jars and bottles. The sealing process takes place after the filling and capping operation. Capped containers pass under an induction cap sealer mounted over a conveyor.
How does a heat induction sealer work?
The system's sealing head produces an electromagnetic field that heats up the foil liner inside the cap. The hot foil in turn melts the polymer coating on the inner-seal. The heat, coupled with the pressure of the cap, causes the inner-seal to bond to the lip of the container resulting in a hermetic seal.
How do you use an induction heat seal?
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What is a heat induction seal liner?
An induction liner, also known as a heat seal liner, is named after the process used to attach the seal to containers. The seal itself consists of three layers: a heat seal, a foil middle, and a backing piece. Induction liners are added inside the cap so that you can seal your containers after they're filled.Aug 28, 2019
How do you test an induction seal?
A simpler method is simply to remove the closure from the sealed container, turn it upside down, or on its side and squeeze. This is a good test to get a feel for the strength of the seal. However, you may have a microscopic leak that will not be detected with this method.
What is heat sealing process?
Heat sealing is the process of sealing one thermoplastic to another similar thermoplastic using heat and pressure. The direct contact method of heat sealing utilizes a constantly heated die or sealing bar to apply heat to a specific contact area or path to seal or weld the thermoplastics together.
What is Lift N Peel?
Lift 'n' Peel™ heat induction seals are suitable for dry and wet products and seal to all container materials with varying degrees of adhesion. The single use foil seal peels easily from container, indicates tamper evidence, and provides an air and watertight, hermetic seal that prevents leakage.