Induction Sealing: What Is It?
The induction sealing process bonds a foil
laminate inner seal to the lip of a container. After the
container has been filled and capped with an induction-lined
closure, it passes underneath the induction sealing system. The
non-contact heating process welds the liner to the container
creating a hermetic seal. The FDA regards induction sealing to
be an effective method of tamper evidence.
Why Choose Induction Sealing?
When properly applied, induction lined caps
provide a hermetic, leak proof, and tamper evident seal. Using
an induction sealing system is ideal for extending product shelf
life, preserving freshness, preventing costly leaks and
enhancing your product's value.
How Induction Sealing Works
An induction sealing machine features two
standard components: the power supply and sealing head. The
sealing head consists of a coiled conductor covered by plastic
housing. When the power supply energizes the inductive coil, it
produces an electro magnetic current, called an eddy current.
When a container fitted with an induction lined cap passes
through this current, the foil from the inner-seal is heated.
This melts the foil's outer polymer coating, which forms a bond
with the lip of the container.
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